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