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) 2018-2023 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/dropreason.h> 26 #include <net/cfg80211.h> 27 #include <net/addrconf.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wep.h" 34 #include "led.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_allmultis)) 44 new_flags |= FIF_ALLMULTI; 45 46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 48 new_flags |= FIF_BCN_PRBRESP_PROMISC; 49 50 if (local->fif_probe_req || local->probe_req_reg) 51 new_flags |= FIF_PROBE_REQ; 52 53 if (local->fif_fcsfail) 54 new_flags |= FIF_FCSFAIL; 55 56 if (local->fif_plcpfail) 57 new_flags |= FIF_PLCPFAIL; 58 59 if (local->fif_control) 60 new_flags |= FIF_CONTROL; 61 62 if (local->fif_other_bss) 63 new_flags |= FIF_OTHER_BSS; 64 65 if (local->fif_pspoll) 66 new_flags |= FIF_PSPOLL; 67 68 if (local->rx_mcast_action_reg) 69 new_flags |= FIF_MCAST_ACTION; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96 { 97 struct ieee80211_sub_if_data *sdata; 98 struct cfg80211_chan_def chandef = {}; 99 u32 changed = 0; 100 int power; 101 u32 offchannel_flag; 102 103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 104 105 if (local->scan_chandef.chan) { 106 chandef = local->scan_chandef; 107 } else if (local->tmp_channel) { 108 chandef.chan = local->tmp_channel; 109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 110 chandef.center_freq1 = chandef.chan->center_freq; 111 chandef.freq1_offset = chandef.chan->freq_offset; 112 } else 113 chandef = local->_oper_chandef; 114 115 WARN(!cfg80211_chandef_valid(&chandef), 116 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 117 chandef.chan->center_freq, chandef.chan->freq_offset, 118 chandef.width, chandef.center_freq1, chandef.freq1_offset, 119 chandef.center_freq2); 120 121 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 122 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 123 else 124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 125 126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 127 128 if (offchannel_flag || 129 !cfg80211_chandef_identical(&local->hw.conf.chandef, 130 &local->_oper_chandef)) { 131 local->hw.conf.chandef = chandef; 132 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 133 } 134 135 if (!conf_is_ht(&local->hw.conf)) { 136 /* 137 * mac80211.h documents that this is only valid 138 * when the channel is set to an HT type, and 139 * that otherwise STATIC is used. 140 */ 141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 142 } else if (local->hw.conf.smps_mode != local->smps_mode) { 143 local->hw.conf.smps_mode = local->smps_mode; 144 changed |= IEEE80211_CONF_CHANGE_SMPS; 145 } 146 147 power = ieee80211_chandef_max_power(&chandef); 148 if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 149 power = min(local->user_power_level, power); 150 151 rcu_read_lock(); 152 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 153 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 154 continue; 155 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 156 continue; 157 if (sdata->vif.bss_conf.txpower == INT_MIN) 158 continue; 159 power = min(power, sdata->vif.bss_conf.txpower); 160 } 161 rcu_read_unlock(); 162 163 if (local->hw.conf.power_level != power) { 164 changed |= IEEE80211_CONF_CHANGE_POWER; 165 local->hw.conf.power_level = power; 166 } 167 168 return changed; 169 } 170 171 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 172 { 173 int ret = 0; 174 175 might_sleep(); 176 177 if (!local->use_chanctx) 178 changed |= ieee80211_hw_conf_chan(local); 179 else 180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 181 IEEE80211_CONF_CHANGE_POWER | 182 IEEE80211_CONF_CHANGE_SMPS); 183 184 if (changed && local->open_count) { 185 ret = drv_config(local, changed); 186 /* 187 * Goal: 188 * HW reconfiguration should never fail, the driver has told 189 * us what it can support so it should live up to that promise. 190 * 191 * Current status: 192 * rfkill is not integrated with mac80211 and a 193 * configuration command can thus fail if hardware rfkill 194 * is enabled 195 * 196 * FIXME: integrate rfkill with mac80211 and then add this 197 * WARN_ON() back 198 * 199 */ 200 /* WARN_ON(ret); */ 201 } 202 203 return ret; 204 } 205 206 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 207 BSS_CHANGED_IDLE |\ 208 BSS_CHANGED_PS |\ 209 BSS_CHANGED_IBSS |\ 210 BSS_CHANGED_ARP_FILTER |\ 211 BSS_CHANGED_SSID) 212 213 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 214 u64 changed) 215 { 216 struct ieee80211_local *local = sdata->local; 217 218 might_sleep(); 219 220 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)); 221 222 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 223 return; 224 225 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 226 BSS_CHANGED_BEACON_ENABLED) && 227 sdata->vif.type != NL80211_IFTYPE_AP && 228 sdata->vif.type != NL80211_IFTYPE_ADHOC && 229 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 230 sdata->vif.type != NL80211_IFTYPE_OCB)) 231 return; 232 233 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 234 sdata->vif.type == NL80211_IFTYPE_NAN || 235 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 236 !sdata->vif.bss_conf.mu_mimo_owner && 237 !(changed & BSS_CHANGED_TXPOWER)))) 238 return; 239 240 if (!check_sdata_in_driver(sdata)) 241 return; 242 243 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 244 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 245 246 trace_drv_vif_cfg_changed(local, sdata, changed); 247 if (local->ops->vif_cfg_changed) 248 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 249 } 250 251 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 252 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 253 254 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 255 changed); 256 if (local->ops->link_info_changed) 257 local->ops->link_info_changed(&local->hw, &sdata->vif, 258 &sdata->vif.bss_conf, ch); 259 } 260 261 if (local->ops->bss_info_changed) 262 local->ops->bss_info_changed(&local->hw, &sdata->vif, 263 &sdata->vif.bss_conf, changed); 264 trace_drv_return_void(local); 265 } 266 267 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 268 u64 changed) 269 { 270 struct ieee80211_local *local = sdata->local; 271 272 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 273 274 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 275 return; 276 277 drv_vif_cfg_changed(local, sdata, changed); 278 } 279 280 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 281 struct ieee80211_link_data *link, 282 u64 changed) 283 { 284 struct ieee80211_local *local = sdata->local; 285 286 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 287 288 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 289 return; 290 291 if (!check_sdata_in_driver(sdata)) 292 return; 293 294 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 295 } 296 297 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 298 { 299 sdata->vif.bss_conf.use_cts_prot = false; 300 sdata->vif.bss_conf.use_short_preamble = false; 301 sdata->vif.bss_conf.use_short_slot = false; 302 return BSS_CHANGED_ERP_CTS_PROT | 303 BSS_CHANGED_ERP_PREAMBLE | 304 BSS_CHANGED_ERP_SLOT; 305 } 306 307 /* context: requires softirqs disabled */ 308 void ieee80211_handle_queued_frames(struct ieee80211_local *local) 309 { 310 struct sk_buff *skb; 311 312 while ((skb = skb_dequeue(&local->skb_queue)) || 313 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 314 switch (skb->pkt_type) { 315 case IEEE80211_RX_MSG: 316 /* Clear skb->pkt_type in order to not confuse kernel 317 * netstack. */ 318 skb->pkt_type = 0; 319 ieee80211_rx(&local->hw, skb); 320 break; 321 case IEEE80211_TX_STATUS_MSG: 322 skb->pkt_type = 0; 323 ieee80211_tx_status(&local->hw, skb); 324 break; 325 default: 326 WARN(1, "mac80211: Packet is of unknown type %d\n", 327 skb->pkt_type); 328 dev_kfree_skb(skb); 329 break; 330 } 331 } 332 } 333 334 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 335 { 336 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 337 338 ieee80211_handle_queued_frames(local); 339 } 340 341 static void ieee80211_restart_work(struct work_struct *work) 342 { 343 struct ieee80211_local *local = 344 container_of(work, struct ieee80211_local, restart_work); 345 struct ieee80211_sub_if_data *sdata; 346 int ret; 347 348 flush_workqueue(local->workqueue); 349 350 rtnl_lock(); 351 /* we might do interface manipulations, so need both */ 352 wiphy_lock(local->hw.wiphy); 353 354 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 355 "%s called with hardware scan in progress\n", __func__); 356 357 list_for_each_entry(sdata, &local->interfaces, list) { 358 /* 359 * XXX: there may be more work for other vif types and even 360 * for station mode: a good thing would be to run most of 361 * the iface type's dependent _stop (ieee80211_mg_stop, 362 * ieee80211_ibss_stop) etc... 363 * For now, fix only the specific bug that was seen: race 364 * between csa_connection_drop_work and us. 365 */ 366 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 367 /* 368 * This worker is scheduled from the iface worker that 369 * runs on mac80211's workqueue, so we can't be 370 * scheduling this worker after the cancel right here. 371 * The exception is ieee80211_chswitch_done. 372 * Then we can have a race... 373 */ 374 wiphy_work_cancel(local->hw.wiphy, 375 &sdata->u.mgd.csa_connection_drop_work); 376 if (sdata->vif.bss_conf.csa_active) { 377 sdata_lock(sdata); 378 ieee80211_sta_connection_lost(sdata, 379 WLAN_REASON_UNSPECIFIED, 380 false); 381 sdata_unlock(sdata); 382 } 383 } 384 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 385 } 386 ieee80211_scan_cancel(local); 387 388 /* make sure any new ROC will consider local->in_reconfig */ 389 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 390 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 391 392 /* wait for all packet processing to be done */ 393 synchronize_net(); 394 395 ret = ieee80211_reconfig(local); 396 wiphy_unlock(local->hw.wiphy); 397 398 if (ret) 399 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 400 401 rtnl_unlock(); 402 } 403 404 void ieee80211_restart_hw(struct ieee80211_hw *hw) 405 { 406 struct ieee80211_local *local = hw_to_local(hw); 407 408 trace_api_restart_hw(local); 409 410 wiphy_info(hw->wiphy, 411 "Hardware restart was requested\n"); 412 413 /* use this reason, ieee80211_reconfig will unblock it */ 414 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 415 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 416 false); 417 418 /* 419 * Stop all Rx during the reconfig. We don't want state changes 420 * or driver callbacks while this is in progress. 421 */ 422 local->in_reconfig = true; 423 barrier(); 424 425 queue_work(system_freezable_wq, &local->restart_work); 426 } 427 EXPORT_SYMBOL(ieee80211_restart_hw); 428 429 #ifdef CONFIG_INET 430 static int ieee80211_ifa_changed(struct notifier_block *nb, 431 unsigned long data, void *arg) 432 { 433 struct in_ifaddr *ifa = arg; 434 struct ieee80211_local *local = 435 container_of(nb, struct ieee80211_local, 436 ifa_notifier); 437 struct net_device *ndev = ifa->ifa_dev->dev; 438 struct wireless_dev *wdev = ndev->ieee80211_ptr; 439 struct in_device *idev; 440 struct ieee80211_sub_if_data *sdata; 441 struct ieee80211_vif_cfg *vif_cfg; 442 struct ieee80211_if_managed *ifmgd; 443 int c = 0; 444 445 /* Make sure it's our interface that got changed */ 446 if (!wdev) 447 return NOTIFY_DONE; 448 449 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 450 return NOTIFY_DONE; 451 452 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 453 vif_cfg = &sdata->vif.cfg; 454 455 /* ARP filtering is only supported in managed mode */ 456 if (sdata->vif.type != NL80211_IFTYPE_STATION) 457 return NOTIFY_DONE; 458 459 idev = __in_dev_get_rtnl(sdata->dev); 460 if (!idev) 461 return NOTIFY_DONE; 462 463 ifmgd = &sdata->u.mgd; 464 465 /* 466 * The nested here is needed to convince lockdep that this is 467 * all OK. Yes, we lock the wiphy mutex here while we already 468 * hold the notifier rwsem, that's the normal case. And yes, 469 * we also acquire the notifier rwsem again when unregistering 470 * a netdev while we already hold the wiphy mutex, so it does 471 * look like a typical ABBA deadlock. 472 * 473 * However, both of these things happen with the RTNL held 474 * already. Therefore, they can't actually happen, since the 475 * lock orders really are ABC and ACB, which is fine due to 476 * the RTNL (A). 477 * 478 * We still need to prevent recursion, which is accomplished 479 * by the !wdev->registered check above. 480 */ 481 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 482 __acquire(&local->hw.wiphy->mtx); 483 sdata_lock(sdata); 484 485 /* Copy the addresses to the vif config list */ 486 ifa = rtnl_dereference(idev->ifa_list); 487 while (ifa) { 488 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 489 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 490 ifa = rtnl_dereference(ifa->ifa_next); 491 c++; 492 } 493 494 vif_cfg->arp_addr_cnt = c; 495 496 /* Configure driver only if associated (which also implies it is up) */ 497 if (ifmgd->associated) 498 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 499 500 sdata_unlock(sdata); 501 wiphy_unlock(local->hw.wiphy); 502 503 return NOTIFY_OK; 504 } 505 #endif 506 507 #if IS_ENABLED(CONFIG_IPV6) 508 static int ieee80211_ifa6_changed(struct notifier_block *nb, 509 unsigned long data, void *arg) 510 { 511 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 512 struct inet6_dev *idev = ifa->idev; 513 struct net_device *ndev = ifa->idev->dev; 514 struct ieee80211_local *local = 515 container_of(nb, struct ieee80211_local, ifa6_notifier); 516 struct wireless_dev *wdev = ndev->ieee80211_ptr; 517 struct ieee80211_sub_if_data *sdata; 518 519 /* Make sure it's our interface that got changed */ 520 if (!wdev || wdev->wiphy != local->hw.wiphy) 521 return NOTIFY_DONE; 522 523 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 524 525 /* 526 * For now only support station mode. This is mostly because 527 * doing AP would have to handle AP_VLAN in some way ... 528 */ 529 if (sdata->vif.type != NL80211_IFTYPE_STATION) 530 return NOTIFY_DONE; 531 532 drv_ipv6_addr_change(local, sdata, idev); 533 534 return NOTIFY_OK; 535 } 536 #endif 537 538 /* There isn't a lot of sense in it, but you can transmit anything you like */ 539 static const struct ieee80211_txrx_stypes 540 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 541 [NL80211_IFTYPE_ADHOC] = { 542 .tx = 0xffff, 543 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 544 BIT(IEEE80211_STYPE_AUTH >> 4) | 545 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 546 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 547 }, 548 [NL80211_IFTYPE_STATION] = { 549 .tx = 0xffff, 550 /* 551 * To support Pre Association Security Negotiation (PASN) while 552 * already associated to one AP, allow user space to register to 553 * Rx authentication frames, so that the user space logic would 554 * be able to receive/handle authentication frames from a 555 * different AP as part of PASN. 556 * It is expected that user space would intelligently register 557 * for Rx authentication frames, i.e., only when PASN is used 558 * and configure a match filter only for PASN authentication 559 * algorithm, as otherwise the MLME functionality of mac80211 560 * would be broken. 561 */ 562 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 563 BIT(IEEE80211_STYPE_AUTH >> 4) | 564 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 565 }, 566 [NL80211_IFTYPE_AP] = { 567 .tx = 0xffff, 568 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 569 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 570 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 571 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 572 BIT(IEEE80211_STYPE_AUTH >> 4) | 573 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 574 BIT(IEEE80211_STYPE_ACTION >> 4), 575 }, 576 [NL80211_IFTYPE_AP_VLAN] = { 577 /* copy AP */ 578 .tx = 0xffff, 579 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 580 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 581 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 582 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 583 BIT(IEEE80211_STYPE_AUTH >> 4) | 584 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 585 BIT(IEEE80211_STYPE_ACTION >> 4), 586 }, 587 [NL80211_IFTYPE_P2P_CLIENT] = { 588 .tx = 0xffff, 589 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 590 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 591 }, 592 [NL80211_IFTYPE_P2P_GO] = { 593 .tx = 0xffff, 594 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 595 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 596 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 597 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 598 BIT(IEEE80211_STYPE_AUTH >> 4) | 599 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 600 BIT(IEEE80211_STYPE_ACTION >> 4), 601 }, 602 [NL80211_IFTYPE_MESH_POINT] = { 603 .tx = 0xffff, 604 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 605 BIT(IEEE80211_STYPE_AUTH >> 4) | 606 BIT(IEEE80211_STYPE_DEAUTH >> 4), 607 }, 608 [NL80211_IFTYPE_P2P_DEVICE] = { 609 .tx = 0xffff, 610 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 611 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 612 }, 613 }; 614 615 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 616 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 617 IEEE80211_HT_AMPDU_PARM_DENSITY, 618 619 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 620 IEEE80211_HT_CAP_MAX_AMSDU | 621 IEEE80211_HT_CAP_SGI_20 | 622 IEEE80211_HT_CAP_SGI_40 | 623 IEEE80211_HT_CAP_TX_STBC | 624 IEEE80211_HT_CAP_RX_STBC | 625 IEEE80211_HT_CAP_LDPC_CODING | 626 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 627 .mcs = { 628 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 629 0xff, 0xff, 0xff, 0xff, 0xff, }, 630 }, 631 }; 632 633 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 634 .vht_cap_info = 635 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 636 IEEE80211_VHT_CAP_SHORT_GI_80 | 637 IEEE80211_VHT_CAP_SHORT_GI_160 | 638 IEEE80211_VHT_CAP_RXSTBC_MASK | 639 IEEE80211_VHT_CAP_TXSTBC | 640 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 641 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 642 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 643 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 644 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 645 .supp_mcs = { 646 .rx_mcs_map = cpu_to_le16(~0), 647 .tx_mcs_map = cpu_to_le16(~0), 648 }, 649 }; 650 651 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 652 const struct ieee80211_ops *ops, 653 const char *requested_name) 654 { 655 struct ieee80211_local *local; 656 int priv_size, i; 657 struct wiphy *wiphy; 658 bool use_chanctx; 659 660 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 661 !ops->add_interface || !ops->remove_interface || 662 !ops->configure_filter || !ops->wake_tx_queue)) 663 return NULL; 664 665 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 666 return NULL; 667 668 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 669 (ops->link_info_changed && ops->bss_info_changed))) 670 return NULL; 671 672 /* check all or no channel context operations exist */ 673 i = !!ops->add_chanctx + !!ops->remove_chanctx + 674 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 675 !!ops->unassign_vif_chanctx; 676 if (WARN_ON(i != 0 && i != 5)) 677 return NULL; 678 use_chanctx = i == 5; 679 680 /* Ensure 32-byte alignment of our private data and hw private data. 681 * We use the wiphy priv data for both our ieee80211_local and for 682 * the driver's private data 683 * 684 * In memory it'll be like this: 685 * 686 * +-------------------------+ 687 * | struct wiphy | 688 * +-------------------------+ 689 * | struct ieee80211_local | 690 * +-------------------------+ 691 * | driver's private data | 692 * +-------------------------+ 693 * 694 */ 695 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 696 697 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 698 699 if (!wiphy) 700 return NULL; 701 702 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 703 704 wiphy->privid = mac80211_wiphy_privid; 705 706 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 707 WIPHY_FLAG_4ADDR_AP | 708 WIPHY_FLAG_4ADDR_STATION | 709 WIPHY_FLAG_REPORTS_OBSS | 710 WIPHY_FLAG_OFFCHAN_TX; 711 712 if (!use_chanctx || ops->remain_on_channel) 713 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 714 715 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 716 NL80211_FEATURE_SAE | 717 NL80211_FEATURE_HT_IBSS | 718 NL80211_FEATURE_VIF_TXPOWER | 719 NL80211_FEATURE_MAC_ON_CREATE | 720 NL80211_FEATURE_USERSPACE_MPM | 721 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 722 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 723 wiphy_ext_feature_set(wiphy, 724 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 725 wiphy_ext_feature_set(wiphy, 726 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 727 wiphy_ext_feature_set(wiphy, 728 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 729 wiphy_ext_feature_set(wiphy, 730 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 731 wiphy_ext_feature_set(wiphy, 732 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 733 734 if (!ops->hw_scan) { 735 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 736 NL80211_FEATURE_AP_SCAN; 737 /* 738 * if the driver behaves correctly using the probe request 739 * (template) from mac80211, then both of these should be 740 * supported even with hw scan - but let drivers opt in. 741 */ 742 wiphy_ext_feature_set(wiphy, 743 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 744 wiphy_ext_feature_set(wiphy, 745 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 746 } 747 748 if (!ops->set_key) 749 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 750 751 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 752 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 753 754 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 755 756 local = wiphy_priv(wiphy); 757 758 if (sta_info_init(local)) 759 goto err_free; 760 761 local->hw.wiphy = wiphy; 762 763 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 764 765 local->ops = ops; 766 local->use_chanctx = use_chanctx; 767 768 /* 769 * We need a bit of data queued to build aggregates properly, so 770 * instruct the TCP stack to allow more than a single ms of data 771 * to be queued in the stack. The value is a bit-shift of 1 772 * second, so 7 is ~8ms of queued data. Only affects local TCP 773 * sockets. 774 * This is the default, anyhow - drivers may need to override it 775 * for local reasons (longer buffers, longer completion time, or 776 * similar). 777 */ 778 local->hw.tx_sk_pacing_shift = 7; 779 780 /* set up some defaults */ 781 local->hw.queues = 1; 782 local->hw.max_rates = 1; 783 local->hw.max_report_rates = 0; 784 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 785 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 786 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 787 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 788 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 789 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 790 IEEE80211_RADIOTAP_MCS_HAVE_GI | 791 IEEE80211_RADIOTAP_MCS_HAVE_BW; 792 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 793 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 794 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 795 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 796 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 797 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 798 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 799 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 800 801 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 802 803 wiphy->extended_capabilities = local->ext_capa; 804 wiphy->extended_capabilities_mask = local->ext_capa; 805 wiphy->extended_capabilities_len = 806 ARRAY_SIZE(local->ext_capa); 807 808 INIT_LIST_HEAD(&local->interfaces); 809 INIT_LIST_HEAD(&local->mon_list); 810 811 __hw_addr_init(&local->mc_list); 812 813 mutex_init(&local->iflist_mtx); 814 mutex_init(&local->mtx); 815 816 mutex_init(&local->key_mtx); 817 spin_lock_init(&local->filter_lock); 818 spin_lock_init(&local->rx_path_lock); 819 spin_lock_init(&local->queue_stop_reason_lock); 820 821 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 822 INIT_LIST_HEAD(&local->active_txqs[i]); 823 spin_lock_init(&local->active_txq_lock[i]); 824 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 825 local->aql_txq_limit_high[i] = 826 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 827 atomic_set(&local->aql_ac_pending_airtime[i], 0); 828 } 829 830 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 831 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 832 atomic_set(&local->aql_total_pending_airtime, 0); 833 834 spin_lock_init(&local->handle_wake_tx_queue_lock); 835 836 INIT_LIST_HEAD(&local->chanctx_list); 837 mutex_init(&local->chanctx_mtx); 838 839 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 840 841 INIT_WORK(&local->restart_work, ieee80211_restart_work); 842 843 wiphy_work_init(&local->radar_detected_work, 844 ieee80211_dfs_radar_detected_work); 845 846 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 847 local->smps_mode = IEEE80211_SMPS_OFF; 848 849 INIT_WORK(&local->dynamic_ps_enable_work, 850 ieee80211_dynamic_ps_enable_work); 851 INIT_WORK(&local->dynamic_ps_disable_work, 852 ieee80211_dynamic_ps_disable_work); 853 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 854 855 wiphy_work_init(&local->sched_scan_stopped_work, 856 ieee80211_sched_scan_stopped_work); 857 858 spin_lock_init(&local->ack_status_lock); 859 idr_init(&local->ack_status_frames); 860 861 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 862 skb_queue_head_init(&local->pending[i]); 863 atomic_set(&local->agg_queue_stop[i], 0); 864 } 865 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 866 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 867 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 868 869 skb_queue_head_init(&local->skb_queue); 870 skb_queue_head_init(&local->skb_queue_unreliable); 871 872 ieee80211_alloc_led_names(local); 873 874 ieee80211_roc_setup(local); 875 876 local->hw.radiotap_timestamp.units_pos = -1; 877 local->hw.radiotap_timestamp.accuracy = -1; 878 879 return &local->hw; 880 err_free: 881 wiphy_free(wiphy); 882 return NULL; 883 } 884 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 885 886 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 887 { 888 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 889 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 890 int r = 0, w = 0; 891 u32 *suites; 892 static const u32 cipher_suites[] = { 893 /* keep WEP first, it may be removed below */ 894 WLAN_CIPHER_SUITE_WEP40, 895 WLAN_CIPHER_SUITE_WEP104, 896 WLAN_CIPHER_SUITE_TKIP, 897 WLAN_CIPHER_SUITE_CCMP, 898 WLAN_CIPHER_SUITE_CCMP_256, 899 WLAN_CIPHER_SUITE_GCMP, 900 WLAN_CIPHER_SUITE_GCMP_256, 901 902 /* keep last -- depends on hw flags! */ 903 WLAN_CIPHER_SUITE_AES_CMAC, 904 WLAN_CIPHER_SUITE_BIP_CMAC_256, 905 WLAN_CIPHER_SUITE_BIP_GMAC_128, 906 WLAN_CIPHER_SUITE_BIP_GMAC_256, 907 }; 908 909 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 910 local->hw.wiphy->cipher_suites) { 911 /* If the driver advertises, or doesn't support SW crypto, 912 * we only need to remove WEP if necessary. 913 */ 914 if (have_wep) 915 return 0; 916 917 /* well if it has _no_ ciphers ... fine */ 918 if (!local->hw.wiphy->n_cipher_suites) 919 return 0; 920 921 /* Driver provides cipher suites, but we need to exclude WEP */ 922 suites = kmemdup(local->hw.wiphy->cipher_suites, 923 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 924 GFP_KERNEL); 925 if (!suites) 926 return -ENOMEM; 927 928 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 929 u32 suite = local->hw.wiphy->cipher_suites[r]; 930 931 if (suite == WLAN_CIPHER_SUITE_WEP40 || 932 suite == WLAN_CIPHER_SUITE_WEP104) 933 continue; 934 suites[w++] = suite; 935 } 936 } else { 937 /* assign the (software supported and perhaps offloaded) 938 * cipher suites 939 */ 940 local->hw.wiphy->cipher_suites = cipher_suites; 941 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 942 943 if (!have_mfp) 944 local->hw.wiphy->n_cipher_suites -= 4; 945 946 if (!have_wep) { 947 local->hw.wiphy->cipher_suites += 2; 948 local->hw.wiphy->n_cipher_suites -= 2; 949 } 950 951 /* not dynamically allocated, so just return */ 952 return 0; 953 } 954 955 local->hw.wiphy->cipher_suites = suites; 956 local->hw.wiphy->n_cipher_suites = w; 957 local->wiphy_ciphers_allocated = true; 958 959 return 0; 960 } 961 962 int ieee80211_register_hw(struct ieee80211_hw *hw) 963 { 964 struct ieee80211_local *local = hw_to_local(hw); 965 int result, i; 966 enum nl80211_band band; 967 int channels, max_bitrates; 968 bool supp_ht, supp_vht, supp_he, supp_eht; 969 struct cfg80211_chan_def dflt_chandef = {}; 970 971 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 972 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 973 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 974 return -EINVAL; 975 976 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 977 (!local->ops->tdls_channel_switch || 978 !local->ops->tdls_cancel_channel_switch || 979 !local->ops->tdls_recv_channel_switch)) 980 return -EOPNOTSUPP; 981 982 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 983 !local->ops->set_frag_threshold)) 984 return -EINVAL; 985 986 if (WARN_ON(local->hw.wiphy->interface_modes & 987 BIT(NL80211_IFTYPE_NAN) && 988 (!local->ops->start_nan || !local->ops->stop_nan))) 989 return -EINVAL; 990 991 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 992 /* 993 * For drivers capable of doing MLO, assume modern driver 994 * or firmware facilities, so software doesn't have to do 995 * as much, e.g. monitoring beacons would be hard if we 996 * might not even know which link is active at which time. 997 */ 998 if (WARN_ON(!local->use_chanctx)) 999 return -EINVAL; 1000 1001 if (WARN_ON(!local->ops->link_info_changed)) 1002 return -EINVAL; 1003 1004 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 1005 return -EINVAL; 1006 1007 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 1008 return -EINVAL; 1009 1010 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 1011 return -EINVAL; 1012 1013 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 1014 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1015 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1016 return -EINVAL; 1017 1018 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1019 return -EINVAL; 1020 1021 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1022 return -EINVAL; 1023 1024 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1025 return -EINVAL; 1026 1027 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1028 return -EINVAL; 1029 1030 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1031 return -EINVAL; 1032 1033 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1034 return -EINVAL; 1035 } 1036 1037 #ifdef CONFIG_PM 1038 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1039 return -EINVAL; 1040 #endif 1041 1042 if (!local->use_chanctx) { 1043 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1044 const struct ieee80211_iface_combination *comb; 1045 1046 comb = &local->hw.wiphy->iface_combinations[i]; 1047 1048 if (comb->num_different_channels > 1) 1049 return -EINVAL; 1050 } 1051 } else { 1052 /* DFS is not supported with multi-channel combinations yet */ 1053 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1054 const struct ieee80211_iface_combination *comb; 1055 1056 comb = &local->hw.wiphy->iface_combinations[i]; 1057 1058 if (comb->radar_detect_widths && 1059 comb->num_different_channels > 1) 1060 return -EINVAL; 1061 } 1062 } 1063 1064 /* Only HW csum features are currently compatible with mac80211 */ 1065 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1066 return -EINVAL; 1067 1068 if (hw->max_report_rates == 0) 1069 hw->max_report_rates = hw->max_rates; 1070 1071 local->rx_chains = 1; 1072 1073 /* 1074 * generic code guarantees at least one band, 1075 * set this very early because much code assumes 1076 * that hw.conf.channel is assigned 1077 */ 1078 channels = 0; 1079 max_bitrates = 0; 1080 supp_ht = false; 1081 supp_vht = false; 1082 supp_he = false; 1083 supp_eht = false; 1084 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1085 struct ieee80211_supported_band *sband; 1086 1087 sband = local->hw.wiphy->bands[band]; 1088 if (!sband) 1089 continue; 1090 1091 if (!dflt_chandef.chan) { 1092 /* 1093 * Assign the first enabled channel to dflt_chandef 1094 * from the list of channels 1095 */ 1096 for (i = 0; i < sband->n_channels; i++) 1097 if (!(sband->channels[i].flags & 1098 IEEE80211_CHAN_DISABLED)) 1099 break; 1100 /* if none found then use the first anyway */ 1101 if (i == sband->n_channels) 1102 i = 0; 1103 cfg80211_chandef_create(&dflt_chandef, 1104 &sband->channels[i], 1105 NL80211_CHAN_NO_HT); 1106 /* init channel we're on */ 1107 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1108 local->hw.conf.chandef = dflt_chandef; 1109 local->_oper_chandef = dflt_chandef; 1110 } 1111 local->monitor_chandef = dflt_chandef; 1112 } 1113 1114 channels += sband->n_channels; 1115 1116 /* 1117 * Due to the way the aggregation code handles this and it 1118 * being an HT capability, we can't really support delayed 1119 * BA in MLO (yet). 1120 */ 1121 if (WARN_ON(sband->ht_cap.ht_supported && 1122 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1123 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1124 return -EINVAL; 1125 1126 if (max_bitrates < sband->n_bitrates) 1127 max_bitrates = sband->n_bitrates; 1128 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1129 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1130 1131 for (i = 0; i < sband->n_iftype_data; i++) { 1132 const struct ieee80211_sband_iftype_data *iftd; 1133 1134 iftd = &sband->iftype_data[i]; 1135 1136 supp_he = supp_he || iftd->he_cap.has_he; 1137 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1138 } 1139 1140 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1141 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1142 (supp_ht || supp_vht || supp_he))) 1143 return -EINVAL; 1144 1145 /* EHT requires HE support */ 1146 if (WARN_ON(supp_eht && !supp_he)) 1147 return -EINVAL; 1148 1149 if (!sband->ht_cap.ht_supported) 1150 continue; 1151 1152 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1153 local->rx_chains = 1154 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1155 local->rx_chains); 1156 1157 /* no need to mask, SM_PS_DISABLED has all bits set */ 1158 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1159 IEEE80211_HT_CAP_SM_PS_SHIFT; 1160 } 1161 1162 /* if low-level driver supports AP, we also support VLAN. 1163 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1164 * based on their support to transmit SW encrypted packets. 1165 */ 1166 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1167 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1168 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1169 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1170 } 1171 1172 /* mac80211 always supports monitor */ 1173 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1174 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1175 1176 /* mac80211 doesn't support more than one IBSS interface right now */ 1177 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1178 const struct ieee80211_iface_combination *c; 1179 int j; 1180 1181 c = &hw->wiphy->iface_combinations[i]; 1182 1183 for (j = 0; j < c->n_limits; j++) 1184 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1185 c->limits[j].max > 1) 1186 return -EINVAL; 1187 } 1188 1189 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1190 sizeof(void *) * channels, GFP_KERNEL); 1191 if (!local->int_scan_req) 1192 return -ENOMEM; 1193 1194 eth_broadcast_addr(local->int_scan_req->bssid); 1195 1196 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1197 if (!local->hw.wiphy->bands[band]) 1198 continue; 1199 local->int_scan_req->rates[band] = (u32) -1; 1200 } 1201 1202 #ifndef CONFIG_MAC80211_MESH 1203 /* mesh depends on Kconfig, but drivers should set it if they want */ 1204 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1205 #endif 1206 1207 /* if the underlying driver supports mesh, mac80211 will (at least) 1208 * provide routing of mesh authentication frames to userspace */ 1209 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1210 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1211 1212 /* mac80211 supports control port protocol changing */ 1213 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1214 1215 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1216 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1217 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1218 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1219 if (hw->max_signal <= 0) { 1220 result = -EINVAL; 1221 goto fail_workqueue; 1222 } 1223 } 1224 1225 /* Mac80211 and therefore all drivers using SW crypto only 1226 * are able to handle PTK rekeys and Extended Key ID. 1227 */ 1228 if (!local->ops->set_key) { 1229 wiphy_ext_feature_set(local->hw.wiphy, 1230 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1231 wiphy_ext_feature_set(local->hw.wiphy, 1232 NL80211_EXT_FEATURE_EXT_KEY_ID); 1233 } 1234 1235 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1236 wiphy_ext_feature_set(local->hw.wiphy, 1237 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1238 1239 /* 1240 * Calculate scan IE length -- we need this to alloc 1241 * memory and to subtract from the driver limit. It 1242 * includes the DS Params, (extended) supported rates, and HT 1243 * information -- SSID is the driver's responsibility. 1244 */ 1245 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1246 3 /* DS Params */; 1247 if (supp_ht) 1248 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1249 1250 if (supp_vht) 1251 local->scan_ies_len += 1252 2 + sizeof(struct ieee80211_vht_cap); 1253 1254 /* 1255 * HE cap element is variable in size - set len to allow max size */ 1256 if (supp_he) { 1257 local->scan_ies_len += 1258 3 + sizeof(struct ieee80211_he_cap_elem) + 1259 sizeof(struct ieee80211_he_mcs_nss_supp) + 1260 IEEE80211_HE_PPE_THRES_MAX_LEN; 1261 1262 if (supp_eht) 1263 local->scan_ies_len += 1264 3 + sizeof(struct ieee80211_eht_cap_elem) + 1265 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1266 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1267 } 1268 1269 if (!local->ops->hw_scan) { 1270 /* For hw_scan, driver needs to set these up. */ 1271 local->hw.wiphy->max_scan_ssids = 4; 1272 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1273 } 1274 1275 /* 1276 * If the driver supports any scan IEs, then assume the 1277 * limit includes the IEs mac80211 will add, otherwise 1278 * leave it at zero and let the driver sort it out; we 1279 * still pass our IEs to the driver but userspace will 1280 * not be allowed to in that case. 1281 */ 1282 if (local->hw.wiphy->max_scan_ie_len) 1283 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1284 1285 result = ieee80211_init_cipher_suites(local); 1286 if (result < 0) 1287 goto fail_workqueue; 1288 1289 if (!local->ops->remain_on_channel) 1290 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1291 1292 /* mac80211 based drivers don't support internal TDLS setup */ 1293 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1294 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1295 1296 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1297 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1298 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1299 1300 /* mac80211 supports multi BSSID, if the driver supports it */ 1301 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1302 local->hw.wiphy->support_mbssid = true; 1303 if (ieee80211_hw_check(&local->hw, 1304 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1305 local->hw.wiphy->support_only_he_mbssid = true; 1306 else 1307 local->ext_capa[2] |= 1308 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1309 } 1310 1311 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1312 1313 /* 1314 * We use the number of queues for feature tests (QoS, HT) internally 1315 * so restrict them appropriately. 1316 */ 1317 if (hw->queues > IEEE80211_MAX_QUEUES) 1318 hw->queues = IEEE80211_MAX_QUEUES; 1319 1320 local->workqueue = 1321 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1322 if (!local->workqueue) { 1323 result = -ENOMEM; 1324 goto fail_workqueue; 1325 } 1326 1327 /* 1328 * The hardware needs headroom for sending the frame, 1329 * and we need some headroom for passing the frame to monitor 1330 * interfaces, but never both at the same time. 1331 */ 1332 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1333 IEEE80211_TX_STATUS_HEADROOM); 1334 1335 /* 1336 * if the driver doesn't specify a max listen interval we 1337 * use 5 which should be a safe default 1338 */ 1339 if (local->hw.max_listen_interval == 0) 1340 local->hw.max_listen_interval = 5; 1341 1342 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1343 1344 local->dynamic_ps_forced_timeout = -1; 1345 1346 if (!local->hw.max_nan_de_entries) 1347 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1348 1349 if (!local->hw.weight_multiplier) 1350 local->hw.weight_multiplier = 1; 1351 1352 ieee80211_wep_init(local); 1353 1354 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1355 1356 ieee80211_led_init(local); 1357 1358 result = ieee80211_txq_setup_flows(local); 1359 if (result) 1360 goto fail_flows; 1361 1362 rtnl_lock(); 1363 result = ieee80211_init_rate_ctrl_alg(local, 1364 hw->rate_control_algorithm); 1365 rtnl_unlock(); 1366 if (result < 0) { 1367 wiphy_debug(local->hw.wiphy, 1368 "Failed to initialize rate control algorithm\n"); 1369 goto fail_rate; 1370 } 1371 1372 if (local->rate_ctrl) { 1373 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1374 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1375 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1376 } 1377 1378 /* 1379 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1380 * or have it when we don't, copy the sband structure and set/clear it. 1381 * This is necessary because rate scaling algorithms could be switched 1382 * and have different support values. 1383 * Print a message so that in the common case the reallocation can be 1384 * avoided. 1385 */ 1386 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1387 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1388 struct ieee80211_supported_band *sband; 1389 bool local_cap, ie_cap; 1390 1391 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1392 1393 sband = local->hw.wiphy->bands[band]; 1394 if (!sband || !sband->vht_cap.vht_supported) 1395 continue; 1396 1397 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1398 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1399 1400 if (local_cap == ie_cap) 1401 continue; 1402 1403 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1404 if (!sband) { 1405 result = -ENOMEM; 1406 goto fail_rate; 1407 } 1408 1409 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1410 band); 1411 1412 sband->vht_cap.vht_mcs.tx_highest ^= 1413 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1414 1415 local->hw.wiphy->bands[band] = sband; 1416 local->sband_allocated |= BIT(band); 1417 } 1418 1419 result = wiphy_register(local->hw.wiphy); 1420 if (result < 0) 1421 goto fail_wiphy_register; 1422 1423 debugfs_hw_add(local); 1424 rate_control_add_debugfs(local); 1425 1426 rtnl_lock(); 1427 wiphy_lock(hw->wiphy); 1428 1429 /* add one default STA interface if supported */ 1430 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1431 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1432 struct vif_params params = {0}; 1433 1434 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1435 NL80211_IFTYPE_STATION, ¶ms); 1436 if (result) 1437 wiphy_warn(local->hw.wiphy, 1438 "Failed to add default virtual iface\n"); 1439 } 1440 1441 wiphy_unlock(hw->wiphy); 1442 rtnl_unlock(); 1443 1444 #ifdef CONFIG_INET 1445 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1446 result = register_inetaddr_notifier(&local->ifa_notifier); 1447 if (result) 1448 goto fail_ifa; 1449 #endif 1450 1451 #if IS_ENABLED(CONFIG_IPV6) 1452 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1453 result = register_inet6addr_notifier(&local->ifa6_notifier); 1454 if (result) 1455 goto fail_ifa6; 1456 #endif 1457 1458 return 0; 1459 1460 #if IS_ENABLED(CONFIG_IPV6) 1461 fail_ifa6: 1462 #ifdef CONFIG_INET 1463 unregister_inetaddr_notifier(&local->ifa_notifier); 1464 #endif 1465 #endif 1466 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1467 fail_ifa: 1468 #endif 1469 wiphy_unregister(local->hw.wiphy); 1470 fail_wiphy_register: 1471 rtnl_lock(); 1472 rate_control_deinitialize(local); 1473 ieee80211_remove_interfaces(local); 1474 rtnl_unlock(); 1475 fail_rate: 1476 fail_flows: 1477 ieee80211_led_exit(local); 1478 destroy_workqueue(local->workqueue); 1479 fail_workqueue: 1480 if (local->wiphy_ciphers_allocated) { 1481 kfree(local->hw.wiphy->cipher_suites); 1482 local->wiphy_ciphers_allocated = false; 1483 } 1484 kfree(local->int_scan_req); 1485 return result; 1486 } 1487 EXPORT_SYMBOL(ieee80211_register_hw); 1488 1489 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1490 { 1491 struct ieee80211_local *local = hw_to_local(hw); 1492 1493 tasklet_kill(&local->tx_pending_tasklet); 1494 tasklet_kill(&local->tasklet); 1495 1496 #ifdef CONFIG_INET 1497 unregister_inetaddr_notifier(&local->ifa_notifier); 1498 #endif 1499 #if IS_ENABLED(CONFIG_IPV6) 1500 unregister_inet6addr_notifier(&local->ifa6_notifier); 1501 #endif 1502 1503 rtnl_lock(); 1504 1505 /* 1506 * At this point, interface list manipulations are fine 1507 * because the driver cannot be handing us frames any 1508 * more and the tasklet is killed. 1509 */ 1510 ieee80211_remove_interfaces(local); 1511 1512 wiphy_lock(local->hw.wiphy); 1513 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1514 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1515 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1516 wiphy_unlock(local->hw.wiphy); 1517 rtnl_unlock(); 1518 1519 cancel_work_sync(&local->restart_work); 1520 cancel_work_sync(&local->reconfig_filter); 1521 1522 ieee80211_clear_tx_pending(local); 1523 rate_control_deinitialize(local); 1524 1525 if (skb_queue_len(&local->skb_queue) || 1526 skb_queue_len(&local->skb_queue_unreliable)) 1527 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1528 skb_queue_purge(&local->skb_queue); 1529 skb_queue_purge(&local->skb_queue_unreliable); 1530 1531 wiphy_unregister(local->hw.wiphy); 1532 destroy_workqueue(local->workqueue); 1533 ieee80211_led_exit(local); 1534 kfree(local->int_scan_req); 1535 } 1536 EXPORT_SYMBOL(ieee80211_unregister_hw); 1537 1538 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1539 { 1540 WARN_ONCE(1, "Have pending ack frames!\n"); 1541 kfree_skb(p); 1542 return 0; 1543 } 1544 1545 void ieee80211_free_hw(struct ieee80211_hw *hw) 1546 { 1547 struct ieee80211_local *local = hw_to_local(hw); 1548 enum nl80211_band band; 1549 1550 mutex_destroy(&local->iflist_mtx); 1551 mutex_destroy(&local->mtx); 1552 1553 if (local->wiphy_ciphers_allocated) { 1554 kfree(local->hw.wiphy->cipher_suites); 1555 local->wiphy_ciphers_allocated = false; 1556 } 1557 1558 idr_for_each(&local->ack_status_frames, 1559 ieee80211_free_ack_frame, NULL); 1560 idr_destroy(&local->ack_status_frames); 1561 1562 sta_info_stop(local); 1563 1564 ieee80211_free_led_names(local); 1565 1566 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1567 if (!(local->sband_allocated & BIT(band))) 1568 continue; 1569 kfree(local->hw.wiphy->bands[band]); 1570 } 1571 1572 wiphy_free(local->hw.wiphy); 1573 } 1574 EXPORT_SYMBOL(ieee80211_free_hw); 1575 1576 static const char * const drop_reasons_monitor[] = { 1577 #define V(x) #x, 1578 [0] = "RX_DROP_MONITOR", 1579 MAC80211_DROP_REASONS_MONITOR(V) 1580 }; 1581 1582 static struct drop_reason_list drop_reason_list_monitor = { 1583 .reasons = drop_reasons_monitor, 1584 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1585 }; 1586 1587 static const char * const drop_reasons_unusable[] = { 1588 [0] = "RX_DROP_UNUSABLE", 1589 MAC80211_DROP_REASONS_UNUSABLE(V) 1590 #undef V 1591 }; 1592 1593 static struct drop_reason_list drop_reason_list_unusable = { 1594 .reasons = drop_reasons_unusable, 1595 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1596 }; 1597 1598 static int __init ieee80211_init(void) 1599 { 1600 struct sk_buff *skb; 1601 int ret; 1602 1603 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1604 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1605 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1606 1607 ret = rc80211_minstrel_init(); 1608 if (ret) 1609 return ret; 1610 1611 ret = ieee80211_iface_init(); 1612 if (ret) 1613 goto err_netdev; 1614 1615 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1616 &drop_reason_list_monitor); 1617 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1618 &drop_reason_list_unusable); 1619 1620 return 0; 1621 err_netdev: 1622 rc80211_minstrel_exit(); 1623 1624 return ret; 1625 } 1626 1627 static void __exit ieee80211_exit(void) 1628 { 1629 rc80211_minstrel_exit(); 1630 1631 ieee80211s_stop(); 1632 1633 ieee80211_iface_exit(); 1634 1635 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1636 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1637 1638 rcu_barrier(); 1639 } 1640 1641 1642 subsys_initcall(ieee80211_init); 1643 module_exit(ieee80211_exit); 1644 1645 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1646 MODULE_LICENSE("GPL"); 1647