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 wiphy *wiphy, 88 struct wiphy_work *work) 89 { 90 struct ieee80211_local *local = 91 container_of(work, struct ieee80211_local, reconfig_filter); 92 93 ieee80211_configure_filter(local); 94 } 95 96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 97 { 98 struct ieee80211_sub_if_data *sdata; 99 struct cfg80211_chan_def chandef = {}; 100 u32 changed = 0; 101 int power; 102 u32 offchannel_flag; 103 104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 105 106 if (local->scan_chandef.chan) { 107 chandef = local->scan_chandef; 108 } else if (local->tmp_channel) { 109 chandef.chan = local->tmp_channel; 110 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 111 chandef.center_freq1 = chandef.chan->center_freq; 112 chandef.freq1_offset = chandef.chan->freq_offset; 113 } else 114 chandef = local->_oper_chandef; 115 116 WARN(!cfg80211_chandef_valid(&chandef), 117 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 118 chandef.chan->center_freq, chandef.chan->freq_offset, 119 chandef.width, chandef.center_freq1, chandef.freq1_offset, 120 chandef.center_freq2); 121 122 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 123 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 124 else 125 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 126 127 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 128 129 if (offchannel_flag || 130 !cfg80211_chandef_identical(&local->hw.conf.chandef, 131 &local->_oper_chandef)) { 132 local->hw.conf.chandef = chandef; 133 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 134 } 135 136 if (!conf_is_ht(&local->hw.conf)) { 137 /* 138 * mac80211.h documents that this is only valid 139 * when the channel is set to an HT type, and 140 * that otherwise STATIC is used. 141 */ 142 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 143 } else if (local->hw.conf.smps_mode != local->smps_mode) { 144 local->hw.conf.smps_mode = local->smps_mode; 145 changed |= IEEE80211_CONF_CHANGE_SMPS; 146 } 147 148 power = ieee80211_chandef_max_power(&chandef); 149 150 rcu_read_lock(); 151 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 152 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 153 continue; 154 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 155 continue; 156 if (sdata->vif.bss_conf.txpower == INT_MIN) 157 continue; 158 power = min(power, sdata->vif.bss_conf.txpower); 159 } 160 rcu_read_unlock(); 161 162 if (local->hw.conf.power_level != power) { 163 changed |= IEEE80211_CONF_CHANGE_POWER; 164 local->hw.conf.power_level = power; 165 } 166 167 return changed; 168 } 169 170 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 171 { 172 int ret = 0; 173 174 might_sleep(); 175 176 if (!local->use_chanctx) 177 changed |= ieee80211_hw_conf_chan(local); 178 else 179 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 180 IEEE80211_CONF_CHANGE_POWER | 181 IEEE80211_CONF_CHANGE_SMPS); 182 183 if (changed && local->open_count) { 184 ret = drv_config(local, changed); 185 /* 186 * Goal: 187 * HW reconfiguration should never fail, the driver has told 188 * us what it can support so it should live up to that promise. 189 * 190 * Current status: 191 * rfkill is not integrated with mac80211 and a 192 * configuration command can thus fail if hardware rfkill 193 * is enabled 194 * 195 * FIXME: integrate rfkill with mac80211 and then add this 196 * WARN_ON() back 197 * 198 */ 199 /* WARN_ON(ret); */ 200 } 201 202 return ret; 203 } 204 205 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 206 BSS_CHANGED_IDLE |\ 207 BSS_CHANGED_PS |\ 208 BSS_CHANGED_IBSS |\ 209 BSS_CHANGED_ARP_FILTER |\ 210 BSS_CHANGED_SSID) 211 212 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 213 u64 changed) 214 { 215 struct ieee80211_local *local = sdata->local; 216 217 might_sleep(); 218 219 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 220 return; 221 222 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 223 BSS_CHANGED_BEACON_ENABLED) && 224 sdata->vif.type != NL80211_IFTYPE_AP && 225 sdata->vif.type != NL80211_IFTYPE_ADHOC && 226 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 227 sdata->vif.type != NL80211_IFTYPE_OCB)) 228 return; 229 230 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 231 sdata->vif.type == NL80211_IFTYPE_NAN || 232 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 233 !sdata->vif.bss_conf.mu_mimo_owner && 234 !(changed & BSS_CHANGED_TXPOWER)))) 235 return; 236 237 if (!check_sdata_in_driver(sdata)) 238 return; 239 240 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 241 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 242 243 trace_drv_vif_cfg_changed(local, sdata, changed); 244 if (local->ops->vif_cfg_changed) 245 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 246 } 247 248 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 249 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 250 251 /* FIXME: should be for each link */ 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 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 306 { 307 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 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_restart_work(struct work_struct *work) 333 { 334 struct ieee80211_local *local = 335 container_of(work, struct ieee80211_local, restart_work); 336 struct ieee80211_sub_if_data *sdata; 337 int ret; 338 339 flush_workqueue(local->workqueue); 340 341 rtnl_lock(); 342 /* we might do interface manipulations, so need both */ 343 wiphy_lock(local->hw.wiphy); 344 wiphy_work_flush(local->hw.wiphy, NULL); 345 346 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 347 "%s called with hardware scan in progress\n", __func__); 348 349 list_for_each_entry(sdata, &local->interfaces, list) { 350 /* 351 * XXX: there may be more work for other vif types and even 352 * for station mode: a good thing would be to run most of 353 * the iface type's dependent _stop (ieee80211_mg_stop, 354 * ieee80211_ibss_stop) etc... 355 * For now, fix only the specific bug that was seen: race 356 * between csa_connection_drop_work and us. 357 */ 358 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 359 /* 360 * This worker is scheduled from the iface worker that 361 * runs on mac80211's workqueue, so we can't be 362 * scheduling this worker after the cancel right here. 363 * The exception is ieee80211_chswitch_done. 364 * Then we can have a race... 365 */ 366 wiphy_work_cancel(local->hw.wiphy, 367 &sdata->u.mgd.csa_connection_drop_work); 368 if (sdata->vif.bss_conf.csa_active) 369 ieee80211_sta_connection_lost(sdata, 370 WLAN_REASON_UNSPECIFIED, 371 false); 372 } 373 wiphy_delayed_work_flush(local->hw.wiphy, 374 &sdata->dec_tailroom_needed_wk); 375 } 376 ieee80211_scan_cancel(local); 377 378 /* make sure any new ROC will consider local->in_reconfig */ 379 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 380 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 381 382 /* wait for all packet processing to be done */ 383 synchronize_net(); 384 385 ret = ieee80211_reconfig(local); 386 wiphy_unlock(local->hw.wiphy); 387 388 if (ret) 389 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 390 391 rtnl_unlock(); 392 } 393 394 void ieee80211_restart_hw(struct ieee80211_hw *hw) 395 { 396 struct ieee80211_local *local = hw_to_local(hw); 397 398 trace_api_restart_hw(local); 399 400 wiphy_info(hw->wiphy, 401 "Hardware restart was requested\n"); 402 403 /* use this reason, ieee80211_reconfig will unblock it */ 404 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 405 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 406 false); 407 408 /* 409 * Stop all Rx during the reconfig. We don't want state changes 410 * or driver callbacks while this is in progress. 411 */ 412 local->in_reconfig = true; 413 barrier(); 414 415 queue_work(system_freezable_wq, &local->restart_work); 416 } 417 EXPORT_SYMBOL(ieee80211_restart_hw); 418 419 #ifdef CONFIG_INET 420 static int ieee80211_ifa_changed(struct notifier_block *nb, 421 unsigned long data, void *arg) 422 { 423 struct in_ifaddr *ifa = arg; 424 struct ieee80211_local *local = 425 container_of(nb, struct ieee80211_local, 426 ifa_notifier); 427 struct net_device *ndev = ifa->ifa_dev->dev; 428 struct wireless_dev *wdev = ndev->ieee80211_ptr; 429 struct in_device *idev; 430 struct ieee80211_sub_if_data *sdata; 431 struct ieee80211_vif_cfg *vif_cfg; 432 struct ieee80211_if_managed *ifmgd; 433 int c = 0; 434 435 /* Make sure it's our interface that got changed */ 436 if (!wdev) 437 return NOTIFY_DONE; 438 439 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 440 return NOTIFY_DONE; 441 442 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 443 vif_cfg = &sdata->vif.cfg; 444 445 /* ARP filtering is only supported in managed mode */ 446 if (sdata->vif.type != NL80211_IFTYPE_STATION) 447 return NOTIFY_DONE; 448 449 idev = __in_dev_get_rtnl(sdata->dev); 450 if (!idev) 451 return NOTIFY_DONE; 452 453 ifmgd = &sdata->u.mgd; 454 455 /* 456 * The nested here is needed to convince lockdep that this is 457 * all OK. Yes, we lock the wiphy mutex here while we already 458 * hold the notifier rwsem, that's the normal case. And yes, 459 * we also acquire the notifier rwsem again when unregistering 460 * a netdev while we already hold the wiphy mutex, so it does 461 * look like a typical ABBA deadlock. 462 * 463 * However, both of these things happen with the RTNL held 464 * already. Therefore, they can't actually happen, since the 465 * lock orders really are ABC and ACB, which is fine due to 466 * the RTNL (A). 467 * 468 * We still need to prevent recursion, which is accomplished 469 * by the !wdev->registered check above. 470 */ 471 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 472 __acquire(&local->hw.wiphy->mtx); 473 474 /* Copy the addresses to the vif config list */ 475 ifa = rtnl_dereference(idev->ifa_list); 476 while (ifa) { 477 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 478 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 479 ifa = rtnl_dereference(ifa->ifa_next); 480 c++; 481 } 482 483 vif_cfg->arp_addr_cnt = c; 484 485 /* Configure driver only if associated (which also implies it is up) */ 486 if (ifmgd->associated) 487 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 488 489 wiphy_unlock(local->hw.wiphy); 490 491 return NOTIFY_OK; 492 } 493 #endif 494 495 #if IS_ENABLED(CONFIG_IPV6) 496 static int ieee80211_ifa6_changed(struct notifier_block *nb, 497 unsigned long data, void *arg) 498 { 499 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 500 struct inet6_dev *idev = ifa->idev; 501 struct net_device *ndev = ifa->idev->dev; 502 struct ieee80211_local *local = 503 container_of(nb, struct ieee80211_local, ifa6_notifier); 504 struct wireless_dev *wdev = ndev->ieee80211_ptr; 505 struct ieee80211_sub_if_data *sdata; 506 507 /* Make sure it's our interface that got changed */ 508 if (!wdev || wdev->wiphy != local->hw.wiphy) 509 return NOTIFY_DONE; 510 511 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 512 513 /* 514 * For now only support station mode. This is mostly because 515 * doing AP would have to handle AP_VLAN in some way ... 516 */ 517 if (sdata->vif.type != NL80211_IFTYPE_STATION) 518 return NOTIFY_DONE; 519 520 drv_ipv6_addr_change(local, sdata, idev); 521 522 return NOTIFY_OK; 523 } 524 #endif 525 526 /* There isn't a lot of sense in it, but you can transmit anything you like */ 527 static const struct ieee80211_txrx_stypes 528 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 529 [NL80211_IFTYPE_ADHOC] = { 530 .tx = 0xffff, 531 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 532 BIT(IEEE80211_STYPE_AUTH >> 4) | 533 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 534 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 535 }, 536 [NL80211_IFTYPE_STATION] = { 537 .tx = 0xffff, 538 /* 539 * To support Pre Association Security Negotiation (PASN) while 540 * already associated to one AP, allow user space to register to 541 * Rx authentication frames, so that the user space logic would 542 * be able to receive/handle authentication frames from a 543 * different AP as part of PASN. 544 * It is expected that user space would intelligently register 545 * for Rx authentication frames, i.e., only when PASN is used 546 * and configure a match filter only for PASN authentication 547 * algorithm, as otherwise the MLME functionality of mac80211 548 * would be broken. 549 */ 550 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 551 BIT(IEEE80211_STYPE_AUTH >> 4) | 552 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 553 }, 554 [NL80211_IFTYPE_AP] = { 555 .tx = 0xffff, 556 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 557 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 558 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 559 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 560 BIT(IEEE80211_STYPE_AUTH >> 4) | 561 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 562 BIT(IEEE80211_STYPE_ACTION >> 4), 563 }, 564 [NL80211_IFTYPE_AP_VLAN] = { 565 /* copy AP */ 566 .tx = 0xffff, 567 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 568 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 569 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 570 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 571 BIT(IEEE80211_STYPE_AUTH >> 4) | 572 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 573 BIT(IEEE80211_STYPE_ACTION >> 4), 574 }, 575 [NL80211_IFTYPE_P2P_CLIENT] = { 576 .tx = 0xffff, 577 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 578 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 579 }, 580 [NL80211_IFTYPE_P2P_GO] = { 581 .tx = 0xffff, 582 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 583 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 584 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 585 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 586 BIT(IEEE80211_STYPE_AUTH >> 4) | 587 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 588 BIT(IEEE80211_STYPE_ACTION >> 4), 589 }, 590 [NL80211_IFTYPE_MESH_POINT] = { 591 .tx = 0xffff, 592 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 593 BIT(IEEE80211_STYPE_AUTH >> 4) | 594 BIT(IEEE80211_STYPE_DEAUTH >> 4), 595 }, 596 [NL80211_IFTYPE_P2P_DEVICE] = { 597 .tx = 0xffff, 598 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 599 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 600 }, 601 }; 602 603 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 604 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 605 IEEE80211_HT_AMPDU_PARM_DENSITY, 606 607 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 608 IEEE80211_HT_CAP_MAX_AMSDU | 609 IEEE80211_HT_CAP_SGI_20 | 610 IEEE80211_HT_CAP_SGI_40 | 611 IEEE80211_HT_CAP_TX_STBC | 612 IEEE80211_HT_CAP_RX_STBC | 613 IEEE80211_HT_CAP_LDPC_CODING | 614 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 615 .mcs = { 616 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 617 0xff, 0xff, 0xff, 0xff, 0xff, }, 618 }, 619 }; 620 621 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 622 .vht_cap_info = 623 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 624 IEEE80211_VHT_CAP_SHORT_GI_80 | 625 IEEE80211_VHT_CAP_SHORT_GI_160 | 626 IEEE80211_VHT_CAP_RXSTBC_MASK | 627 IEEE80211_VHT_CAP_TXSTBC | 628 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 629 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 630 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 631 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 632 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 633 .supp_mcs = { 634 .rx_mcs_map = cpu_to_le16(~0), 635 .tx_mcs_map = cpu_to_le16(~0), 636 }, 637 }; 638 639 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 640 const struct ieee80211_ops *ops, 641 const char *requested_name) 642 { 643 struct ieee80211_local *local; 644 int priv_size, i; 645 struct wiphy *wiphy; 646 bool use_chanctx; 647 648 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 649 !ops->add_interface || !ops->remove_interface || 650 !ops->configure_filter || !ops->wake_tx_queue)) 651 return NULL; 652 653 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 654 return NULL; 655 656 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 657 (ops->link_info_changed && ops->bss_info_changed))) 658 return NULL; 659 660 /* check all or no channel context operations exist */ 661 i = !!ops->add_chanctx + !!ops->remove_chanctx + 662 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 663 !!ops->unassign_vif_chanctx; 664 if (WARN_ON(i != 0 && i != 5)) 665 return NULL; 666 use_chanctx = i == 5; 667 668 /* Ensure 32-byte alignment of our private data and hw private data. 669 * We use the wiphy priv data for both our ieee80211_local and for 670 * the driver's private data 671 * 672 * In memory it'll be like this: 673 * 674 * +-------------------------+ 675 * | struct wiphy | 676 * +-------------------------+ 677 * | struct ieee80211_local | 678 * +-------------------------+ 679 * | driver's private data | 680 * +-------------------------+ 681 * 682 */ 683 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 684 685 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 686 687 if (!wiphy) 688 return NULL; 689 690 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 691 692 wiphy->privid = mac80211_wiphy_privid; 693 694 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 695 WIPHY_FLAG_4ADDR_AP | 696 WIPHY_FLAG_4ADDR_STATION | 697 WIPHY_FLAG_REPORTS_OBSS | 698 WIPHY_FLAG_OFFCHAN_TX; 699 700 if (!use_chanctx || ops->remain_on_channel) 701 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 702 703 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 704 NL80211_FEATURE_SAE | 705 NL80211_FEATURE_HT_IBSS | 706 NL80211_FEATURE_VIF_TXPOWER | 707 NL80211_FEATURE_MAC_ON_CREATE | 708 NL80211_FEATURE_USERSPACE_MPM | 709 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 710 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 711 wiphy_ext_feature_set(wiphy, 712 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 713 wiphy_ext_feature_set(wiphy, 714 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 715 wiphy_ext_feature_set(wiphy, 716 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 717 wiphy_ext_feature_set(wiphy, 718 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 719 wiphy_ext_feature_set(wiphy, 720 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 721 722 if (!ops->hw_scan) { 723 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 724 NL80211_FEATURE_AP_SCAN; 725 /* 726 * if the driver behaves correctly using the probe request 727 * (template) from mac80211, then both of these should be 728 * supported even with hw scan - but let drivers opt in. 729 */ 730 wiphy_ext_feature_set(wiphy, 731 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 732 wiphy_ext_feature_set(wiphy, 733 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 734 } 735 736 if (!ops->set_key) 737 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 738 739 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 740 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 741 742 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 743 744 local = wiphy_priv(wiphy); 745 746 if (sta_info_init(local)) 747 goto err_free; 748 749 local->hw.wiphy = wiphy; 750 751 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 752 753 local->ops = ops; 754 local->use_chanctx = use_chanctx; 755 756 /* 757 * We need a bit of data queued to build aggregates properly, so 758 * instruct the TCP stack to allow more than a single ms of data 759 * to be queued in the stack. The value is a bit-shift of 1 760 * second, so 7 is ~8ms of queued data. Only affects local TCP 761 * sockets. 762 * This is the default, anyhow - drivers may need to override it 763 * for local reasons (longer buffers, longer completion time, or 764 * similar). 765 */ 766 local->hw.tx_sk_pacing_shift = 7; 767 768 /* set up some defaults */ 769 local->hw.queues = 1; 770 local->hw.max_rates = 1; 771 local->hw.max_report_rates = 0; 772 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 773 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 774 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 775 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 776 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 777 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 778 IEEE80211_RADIOTAP_MCS_HAVE_GI | 779 IEEE80211_RADIOTAP_MCS_HAVE_BW; 780 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 781 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 782 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 783 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 784 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 785 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 786 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 787 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 788 789 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 790 791 wiphy->extended_capabilities = local->ext_capa; 792 wiphy->extended_capabilities_mask = local->ext_capa; 793 wiphy->extended_capabilities_len = 794 ARRAY_SIZE(local->ext_capa); 795 796 INIT_LIST_HEAD(&local->interfaces); 797 INIT_LIST_HEAD(&local->mon_list); 798 799 __hw_addr_init(&local->mc_list); 800 801 mutex_init(&local->iflist_mtx); 802 spin_lock_init(&local->filter_lock); 803 spin_lock_init(&local->rx_path_lock); 804 spin_lock_init(&local->queue_stop_reason_lock); 805 806 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 807 INIT_LIST_HEAD(&local->active_txqs[i]); 808 spin_lock_init(&local->active_txq_lock[i]); 809 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 810 local->aql_txq_limit_high[i] = 811 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 812 atomic_set(&local->aql_ac_pending_airtime[i], 0); 813 } 814 815 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 816 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 817 atomic_set(&local->aql_total_pending_airtime, 0); 818 819 spin_lock_init(&local->handle_wake_tx_queue_lock); 820 821 INIT_LIST_HEAD(&local->chanctx_list); 822 823 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 824 825 INIT_WORK(&local->restart_work, ieee80211_restart_work); 826 827 wiphy_work_init(&local->radar_detected_work, 828 ieee80211_dfs_radar_detected_work); 829 830 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 831 local->smps_mode = IEEE80211_SMPS_OFF; 832 833 wiphy_work_init(&local->dynamic_ps_enable_work, 834 ieee80211_dynamic_ps_enable_work); 835 wiphy_work_init(&local->dynamic_ps_disable_work, 836 ieee80211_dynamic_ps_disable_work); 837 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 838 839 wiphy_work_init(&local->sched_scan_stopped_work, 840 ieee80211_sched_scan_stopped_work); 841 842 spin_lock_init(&local->ack_status_lock); 843 idr_init(&local->ack_status_frames); 844 845 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 846 skb_queue_head_init(&local->pending[i]); 847 atomic_set(&local->agg_queue_stop[i], 0); 848 } 849 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 850 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 851 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 852 853 skb_queue_head_init(&local->skb_queue); 854 skb_queue_head_init(&local->skb_queue_unreliable); 855 856 ieee80211_alloc_led_names(local); 857 858 ieee80211_roc_setup(local); 859 860 local->hw.radiotap_timestamp.units_pos = -1; 861 local->hw.radiotap_timestamp.accuracy = -1; 862 863 return &local->hw; 864 err_free: 865 wiphy_free(wiphy); 866 return NULL; 867 } 868 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 869 870 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 871 { 872 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 873 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 874 int r = 0, w = 0; 875 u32 *suites; 876 static const u32 cipher_suites[] = { 877 /* keep WEP first, it may be removed below */ 878 WLAN_CIPHER_SUITE_WEP40, 879 WLAN_CIPHER_SUITE_WEP104, 880 WLAN_CIPHER_SUITE_TKIP, 881 WLAN_CIPHER_SUITE_CCMP, 882 WLAN_CIPHER_SUITE_CCMP_256, 883 WLAN_CIPHER_SUITE_GCMP, 884 WLAN_CIPHER_SUITE_GCMP_256, 885 886 /* keep last -- depends on hw flags! */ 887 WLAN_CIPHER_SUITE_AES_CMAC, 888 WLAN_CIPHER_SUITE_BIP_CMAC_256, 889 WLAN_CIPHER_SUITE_BIP_GMAC_128, 890 WLAN_CIPHER_SUITE_BIP_GMAC_256, 891 }; 892 893 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 894 local->hw.wiphy->cipher_suites) { 895 /* If the driver advertises, or doesn't support SW crypto, 896 * we only need to remove WEP if necessary. 897 */ 898 if (have_wep) 899 return 0; 900 901 /* well if it has _no_ ciphers ... fine */ 902 if (!local->hw.wiphy->n_cipher_suites) 903 return 0; 904 905 /* Driver provides cipher suites, but we need to exclude WEP */ 906 suites = kmemdup(local->hw.wiphy->cipher_suites, 907 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 908 GFP_KERNEL); 909 if (!suites) 910 return -ENOMEM; 911 912 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 913 u32 suite = local->hw.wiphy->cipher_suites[r]; 914 915 if (suite == WLAN_CIPHER_SUITE_WEP40 || 916 suite == WLAN_CIPHER_SUITE_WEP104) 917 continue; 918 suites[w++] = suite; 919 } 920 } else { 921 /* assign the (software supported and perhaps offloaded) 922 * cipher suites 923 */ 924 local->hw.wiphy->cipher_suites = cipher_suites; 925 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 926 927 if (!have_mfp) 928 local->hw.wiphy->n_cipher_suites -= 4; 929 930 if (!have_wep) { 931 local->hw.wiphy->cipher_suites += 2; 932 local->hw.wiphy->n_cipher_suites -= 2; 933 } 934 935 /* not dynamically allocated, so just return */ 936 return 0; 937 } 938 939 local->hw.wiphy->cipher_suites = suites; 940 local->hw.wiphy->n_cipher_suites = w; 941 local->wiphy_ciphers_allocated = true; 942 943 return 0; 944 } 945 946 int ieee80211_register_hw(struct ieee80211_hw *hw) 947 { 948 struct ieee80211_local *local = hw_to_local(hw); 949 int result, i; 950 enum nl80211_band band; 951 int channels, max_bitrates; 952 bool supp_ht, supp_vht, supp_he, supp_eht; 953 struct cfg80211_chan_def dflt_chandef = {}; 954 955 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 956 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 957 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 958 return -EINVAL; 959 960 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 961 (!local->ops->tdls_channel_switch || 962 !local->ops->tdls_cancel_channel_switch || 963 !local->ops->tdls_recv_channel_switch)) 964 return -EOPNOTSUPP; 965 966 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 967 !local->ops->set_frag_threshold)) 968 return -EINVAL; 969 970 if (WARN_ON(local->hw.wiphy->interface_modes & 971 BIT(NL80211_IFTYPE_NAN) && 972 (!local->ops->start_nan || !local->ops->stop_nan))) 973 return -EINVAL; 974 975 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 976 /* 977 * For drivers capable of doing MLO, assume modern driver 978 * or firmware facilities, so software doesn't have to do 979 * as much, e.g. monitoring beacons would be hard if we 980 * might not even know which link is active at which time. 981 */ 982 if (WARN_ON(!local->use_chanctx)) 983 return -EINVAL; 984 985 if (WARN_ON(!local->ops->link_info_changed)) 986 return -EINVAL; 987 988 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 989 return -EINVAL; 990 991 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 992 return -EINVAL; 993 994 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 995 return -EINVAL; 996 997 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 998 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 999 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1000 return -EINVAL; 1001 1002 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1003 return -EINVAL; 1004 1005 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1006 return -EINVAL; 1007 1008 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1009 return -EINVAL; 1010 1011 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1012 return -EINVAL; 1013 1014 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1015 return -EINVAL; 1016 1017 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1018 return -EINVAL; 1019 } 1020 1021 #ifdef CONFIG_PM 1022 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1023 return -EINVAL; 1024 #endif 1025 1026 if (!local->use_chanctx) { 1027 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1028 const struct ieee80211_iface_combination *comb; 1029 1030 comb = &local->hw.wiphy->iface_combinations[i]; 1031 1032 if (comb->num_different_channels > 1) 1033 return -EINVAL; 1034 } 1035 } else { 1036 /* DFS is not supported with multi-channel combinations yet */ 1037 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1038 const struct ieee80211_iface_combination *comb; 1039 1040 comb = &local->hw.wiphy->iface_combinations[i]; 1041 1042 if (comb->radar_detect_widths && 1043 comb->num_different_channels > 1) 1044 return -EINVAL; 1045 } 1046 } 1047 1048 /* Only HW csum features are currently compatible with mac80211 */ 1049 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1050 return -EINVAL; 1051 1052 if (hw->max_report_rates == 0) 1053 hw->max_report_rates = hw->max_rates; 1054 1055 local->rx_chains = 1; 1056 1057 /* 1058 * generic code guarantees at least one band, 1059 * set this very early because much code assumes 1060 * that hw.conf.channel is assigned 1061 */ 1062 channels = 0; 1063 max_bitrates = 0; 1064 supp_ht = false; 1065 supp_vht = false; 1066 supp_he = false; 1067 supp_eht = false; 1068 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1069 const struct ieee80211_sband_iftype_data *iftd; 1070 struct ieee80211_supported_band *sband; 1071 1072 sband = local->hw.wiphy->bands[band]; 1073 if (!sband) 1074 continue; 1075 1076 if (!dflt_chandef.chan) { 1077 /* 1078 * Assign the first enabled channel to dflt_chandef 1079 * from the list of channels 1080 */ 1081 for (i = 0; i < sband->n_channels; i++) 1082 if (!(sband->channels[i].flags & 1083 IEEE80211_CHAN_DISABLED)) 1084 break; 1085 /* if none found then use the first anyway */ 1086 if (i == sband->n_channels) 1087 i = 0; 1088 cfg80211_chandef_create(&dflt_chandef, 1089 &sband->channels[i], 1090 NL80211_CHAN_NO_HT); 1091 /* init channel we're on */ 1092 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1093 local->hw.conf.chandef = dflt_chandef; 1094 local->_oper_chandef = dflt_chandef; 1095 } 1096 local->monitor_chandef = dflt_chandef; 1097 } 1098 1099 channels += sband->n_channels; 1100 1101 /* 1102 * Due to the way the aggregation code handles this and it 1103 * being an HT capability, we can't really support delayed 1104 * BA in MLO (yet). 1105 */ 1106 if (WARN_ON(sband->ht_cap.ht_supported && 1107 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1108 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1109 return -EINVAL; 1110 1111 if (max_bitrates < sband->n_bitrates) 1112 max_bitrates = sband->n_bitrates; 1113 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1114 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1115 1116 for_each_sband_iftype_data(sband, i, iftd) { 1117 supp_he = supp_he || iftd->he_cap.has_he; 1118 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1119 } 1120 1121 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1122 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1123 (supp_ht || supp_vht || supp_he))) 1124 return -EINVAL; 1125 1126 /* EHT requires HE support */ 1127 if (WARN_ON(supp_eht && !supp_he)) 1128 return -EINVAL; 1129 1130 if (!sband->ht_cap.ht_supported) 1131 continue; 1132 1133 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1134 local->rx_chains = 1135 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1136 local->rx_chains); 1137 1138 /* no need to mask, SM_PS_DISABLED has all bits set */ 1139 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1140 IEEE80211_HT_CAP_SM_PS_SHIFT; 1141 } 1142 1143 /* if low-level driver supports AP, we also support VLAN. 1144 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1145 * based on their support to transmit SW encrypted packets. 1146 */ 1147 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1148 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1149 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1150 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1151 } 1152 1153 /* mac80211 always supports monitor */ 1154 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1155 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1156 1157 /* mac80211 doesn't support more than one IBSS interface right now */ 1158 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1159 const struct ieee80211_iface_combination *c; 1160 int j; 1161 1162 c = &hw->wiphy->iface_combinations[i]; 1163 1164 for (j = 0; j < c->n_limits; j++) 1165 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1166 c->limits[j].max > 1) 1167 return -EINVAL; 1168 } 1169 1170 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1171 sizeof(void *) * channels, GFP_KERNEL); 1172 if (!local->int_scan_req) 1173 return -ENOMEM; 1174 1175 eth_broadcast_addr(local->int_scan_req->bssid); 1176 1177 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1178 if (!local->hw.wiphy->bands[band]) 1179 continue; 1180 local->int_scan_req->rates[band] = (u32) -1; 1181 } 1182 1183 #ifndef CONFIG_MAC80211_MESH 1184 /* mesh depends on Kconfig, but drivers should set it if they want */ 1185 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1186 #endif 1187 1188 /* if the underlying driver supports mesh, mac80211 will (at least) 1189 * provide routing of mesh authentication frames to userspace */ 1190 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1191 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1192 1193 /* mac80211 supports control port protocol changing */ 1194 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1195 1196 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1197 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1198 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1199 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1200 if (hw->max_signal <= 0) { 1201 result = -EINVAL; 1202 goto fail_workqueue; 1203 } 1204 } 1205 1206 /* Mac80211 and therefore all drivers using SW crypto only 1207 * are able to handle PTK rekeys and Extended Key ID. 1208 */ 1209 if (!local->ops->set_key) { 1210 wiphy_ext_feature_set(local->hw.wiphy, 1211 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1212 wiphy_ext_feature_set(local->hw.wiphy, 1213 NL80211_EXT_FEATURE_EXT_KEY_ID); 1214 } 1215 1216 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1217 wiphy_ext_feature_set(local->hw.wiphy, 1218 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1219 1220 /* 1221 * Calculate scan IE length -- we need this to alloc 1222 * memory and to subtract from the driver limit. It 1223 * includes the DS Params, (extended) supported rates, and HT 1224 * information -- SSID is the driver's responsibility. 1225 */ 1226 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1227 3 /* DS Params */; 1228 if (supp_ht) 1229 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1230 1231 if (supp_vht) 1232 local->scan_ies_len += 1233 2 + sizeof(struct ieee80211_vht_cap); 1234 1235 /* 1236 * HE cap element is variable in size - set len to allow max size */ 1237 if (supp_he) { 1238 local->scan_ies_len += 1239 3 + sizeof(struct ieee80211_he_cap_elem) + 1240 sizeof(struct ieee80211_he_mcs_nss_supp) + 1241 IEEE80211_HE_PPE_THRES_MAX_LEN; 1242 1243 if (supp_eht) 1244 local->scan_ies_len += 1245 3 + sizeof(struct ieee80211_eht_cap_elem) + 1246 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1247 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1248 } 1249 1250 if (!local->ops->hw_scan) { 1251 /* For hw_scan, driver needs to set these up. */ 1252 local->hw.wiphy->max_scan_ssids = 4; 1253 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1254 } 1255 1256 /* 1257 * If the driver supports any scan IEs, then assume the 1258 * limit includes the IEs mac80211 will add, otherwise 1259 * leave it at zero and let the driver sort it out; we 1260 * still pass our IEs to the driver but userspace will 1261 * not be allowed to in that case. 1262 */ 1263 if (local->hw.wiphy->max_scan_ie_len) 1264 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1265 1266 result = ieee80211_init_cipher_suites(local); 1267 if (result < 0) 1268 goto fail_workqueue; 1269 1270 if (!local->ops->remain_on_channel) 1271 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1272 1273 /* mac80211 based drivers don't support internal TDLS setup */ 1274 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1275 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1276 1277 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1278 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1279 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1280 1281 /* mac80211 supports multi BSSID, if the driver supports it */ 1282 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1283 local->hw.wiphy->support_mbssid = true; 1284 if (ieee80211_hw_check(&local->hw, 1285 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1286 local->hw.wiphy->support_only_he_mbssid = true; 1287 else 1288 local->ext_capa[2] |= 1289 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1290 } 1291 1292 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1293 1294 /* 1295 * We use the number of queues for feature tests (QoS, HT) internally 1296 * so restrict them appropriately. 1297 */ 1298 if (hw->queues > IEEE80211_MAX_QUEUES) 1299 hw->queues = IEEE80211_MAX_QUEUES; 1300 1301 local->workqueue = 1302 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1303 if (!local->workqueue) { 1304 result = -ENOMEM; 1305 goto fail_workqueue; 1306 } 1307 1308 /* 1309 * The hardware needs headroom for sending the frame, 1310 * and we need some headroom for passing the frame to monitor 1311 * interfaces, but never both at the same time. 1312 */ 1313 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1314 IEEE80211_TX_STATUS_HEADROOM); 1315 1316 /* 1317 * if the driver doesn't specify a max listen interval we 1318 * use 5 which should be a safe default 1319 */ 1320 if (local->hw.max_listen_interval == 0) 1321 local->hw.max_listen_interval = 5; 1322 1323 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1324 1325 local->dynamic_ps_forced_timeout = -1; 1326 1327 if (!local->hw.max_nan_de_entries) 1328 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1329 1330 if (!local->hw.weight_multiplier) 1331 local->hw.weight_multiplier = 1; 1332 1333 ieee80211_wep_init(local); 1334 1335 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1336 1337 ieee80211_led_init(local); 1338 1339 result = ieee80211_txq_setup_flows(local); 1340 if (result) 1341 goto fail_flows; 1342 1343 rtnl_lock(); 1344 result = ieee80211_init_rate_ctrl_alg(local, 1345 hw->rate_control_algorithm); 1346 rtnl_unlock(); 1347 if (result < 0) { 1348 wiphy_debug(local->hw.wiphy, 1349 "Failed to initialize rate control algorithm\n"); 1350 goto fail_rate; 1351 } 1352 1353 if (local->rate_ctrl) { 1354 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1355 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1356 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1357 } 1358 1359 /* 1360 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1361 * or have it when we don't, copy the sband structure and set/clear it. 1362 * This is necessary because rate scaling algorithms could be switched 1363 * and have different support values. 1364 * Print a message so that in the common case the reallocation can be 1365 * avoided. 1366 */ 1367 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1368 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1369 struct ieee80211_supported_band *sband; 1370 bool local_cap, ie_cap; 1371 1372 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1373 1374 sband = local->hw.wiphy->bands[band]; 1375 if (!sband || !sband->vht_cap.vht_supported) 1376 continue; 1377 1378 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1379 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1380 1381 if (local_cap == ie_cap) 1382 continue; 1383 1384 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1385 if (!sband) { 1386 result = -ENOMEM; 1387 goto fail_rate; 1388 } 1389 1390 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1391 band); 1392 1393 sband->vht_cap.vht_mcs.tx_highest ^= 1394 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1395 1396 local->hw.wiphy->bands[band] = sband; 1397 local->sband_allocated |= BIT(band); 1398 } 1399 1400 result = wiphy_register(local->hw.wiphy); 1401 if (result < 0) 1402 goto fail_wiphy_register; 1403 1404 debugfs_hw_add(local); 1405 rate_control_add_debugfs(local); 1406 1407 rtnl_lock(); 1408 wiphy_lock(hw->wiphy); 1409 1410 /* add one default STA interface if supported */ 1411 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1412 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1413 struct vif_params params = {0}; 1414 1415 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1416 NL80211_IFTYPE_STATION, ¶ms); 1417 if (result) 1418 wiphy_warn(local->hw.wiphy, 1419 "Failed to add default virtual iface\n"); 1420 } 1421 1422 wiphy_unlock(hw->wiphy); 1423 rtnl_unlock(); 1424 1425 #ifdef CONFIG_INET 1426 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1427 result = register_inetaddr_notifier(&local->ifa_notifier); 1428 if (result) 1429 goto fail_ifa; 1430 #endif 1431 1432 #if IS_ENABLED(CONFIG_IPV6) 1433 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1434 result = register_inet6addr_notifier(&local->ifa6_notifier); 1435 if (result) 1436 goto fail_ifa6; 1437 #endif 1438 1439 return 0; 1440 1441 #if IS_ENABLED(CONFIG_IPV6) 1442 fail_ifa6: 1443 #ifdef CONFIG_INET 1444 unregister_inetaddr_notifier(&local->ifa_notifier); 1445 #endif 1446 #endif 1447 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1448 fail_ifa: 1449 #endif 1450 wiphy_unregister(local->hw.wiphy); 1451 fail_wiphy_register: 1452 rtnl_lock(); 1453 rate_control_deinitialize(local); 1454 ieee80211_remove_interfaces(local); 1455 rtnl_unlock(); 1456 fail_rate: 1457 ieee80211_txq_teardown_flows(local); 1458 fail_flows: 1459 ieee80211_led_exit(local); 1460 destroy_workqueue(local->workqueue); 1461 fail_workqueue: 1462 if (local->wiphy_ciphers_allocated) { 1463 kfree(local->hw.wiphy->cipher_suites); 1464 local->wiphy_ciphers_allocated = false; 1465 } 1466 kfree(local->int_scan_req); 1467 return result; 1468 } 1469 EXPORT_SYMBOL(ieee80211_register_hw); 1470 1471 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1472 { 1473 struct ieee80211_local *local = hw_to_local(hw); 1474 1475 tasklet_kill(&local->tx_pending_tasklet); 1476 tasklet_kill(&local->tasklet); 1477 1478 #ifdef CONFIG_INET 1479 unregister_inetaddr_notifier(&local->ifa_notifier); 1480 #endif 1481 #if IS_ENABLED(CONFIG_IPV6) 1482 unregister_inet6addr_notifier(&local->ifa6_notifier); 1483 #endif 1484 1485 rtnl_lock(); 1486 1487 /* 1488 * At this point, interface list manipulations are fine 1489 * because the driver cannot be handing us frames any 1490 * more and the tasklet is killed. 1491 */ 1492 ieee80211_remove_interfaces(local); 1493 1494 ieee80211_txq_teardown_flows(local); 1495 1496 wiphy_lock(local->hw.wiphy); 1497 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1498 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1499 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1500 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1501 wiphy_unlock(local->hw.wiphy); 1502 rtnl_unlock(); 1503 1504 cancel_work_sync(&local->restart_work); 1505 1506 ieee80211_clear_tx_pending(local); 1507 rate_control_deinitialize(local); 1508 1509 if (skb_queue_len(&local->skb_queue) || 1510 skb_queue_len(&local->skb_queue_unreliable)) 1511 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1512 skb_queue_purge(&local->skb_queue); 1513 skb_queue_purge(&local->skb_queue_unreliable); 1514 1515 wiphy_unregister(local->hw.wiphy); 1516 destroy_workqueue(local->workqueue); 1517 ieee80211_led_exit(local); 1518 kfree(local->int_scan_req); 1519 } 1520 EXPORT_SYMBOL(ieee80211_unregister_hw); 1521 1522 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1523 { 1524 WARN_ONCE(1, "Have pending ack frames!\n"); 1525 kfree_skb(p); 1526 return 0; 1527 } 1528 1529 void ieee80211_free_hw(struct ieee80211_hw *hw) 1530 { 1531 struct ieee80211_local *local = hw_to_local(hw); 1532 enum nl80211_band band; 1533 1534 mutex_destroy(&local->iflist_mtx); 1535 1536 if (local->wiphy_ciphers_allocated) { 1537 kfree(local->hw.wiphy->cipher_suites); 1538 local->wiphy_ciphers_allocated = false; 1539 } 1540 1541 idr_for_each(&local->ack_status_frames, 1542 ieee80211_free_ack_frame, NULL); 1543 idr_destroy(&local->ack_status_frames); 1544 1545 sta_info_stop(local); 1546 1547 ieee80211_free_led_names(local); 1548 1549 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1550 if (!(local->sband_allocated & BIT(band))) 1551 continue; 1552 kfree(local->hw.wiphy->bands[band]); 1553 } 1554 1555 wiphy_free(local->hw.wiphy); 1556 } 1557 EXPORT_SYMBOL(ieee80211_free_hw); 1558 1559 static const char * const drop_reasons_monitor[] = { 1560 #define V(x) #x, 1561 [0] = "RX_DROP_MONITOR", 1562 MAC80211_DROP_REASONS_MONITOR(V) 1563 }; 1564 1565 static struct drop_reason_list drop_reason_list_monitor = { 1566 .reasons = drop_reasons_monitor, 1567 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1568 }; 1569 1570 static const char * const drop_reasons_unusable[] = { 1571 [0] = "RX_DROP_UNUSABLE", 1572 MAC80211_DROP_REASONS_UNUSABLE(V) 1573 #undef V 1574 }; 1575 1576 static struct drop_reason_list drop_reason_list_unusable = { 1577 .reasons = drop_reasons_unusable, 1578 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1579 }; 1580 1581 static int __init ieee80211_init(void) 1582 { 1583 struct sk_buff *skb; 1584 int ret; 1585 1586 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1587 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1588 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1589 1590 ret = rc80211_minstrel_init(); 1591 if (ret) 1592 return ret; 1593 1594 ret = ieee80211_iface_init(); 1595 if (ret) 1596 goto err_netdev; 1597 1598 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1599 &drop_reason_list_monitor); 1600 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1601 &drop_reason_list_unusable); 1602 1603 return 0; 1604 err_netdev: 1605 rc80211_minstrel_exit(); 1606 1607 return ret; 1608 } 1609 1610 static void __exit ieee80211_exit(void) 1611 { 1612 rc80211_minstrel_exit(); 1613 1614 ieee80211s_stop(); 1615 1616 ieee80211_iface_exit(); 1617 1618 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1619 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1620 1621 rcu_barrier(); 1622 } 1623 1624 1625 subsys_initcall(ieee80211_init); 1626 module_exit(ieee80211_exit); 1627 1628 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1629 MODULE_LICENSE("GPL"); 1630