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