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 BSS_CHANGED_MLD_VALID_LINKS) 212 213 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 214 u64 changed) 215 { 216 struct ieee80211_local *local = sdata->local; 217 218 might_sleep(); 219 220 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 /* FIXME: should be for each link */ 253 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 254 changed); 255 if (local->ops->link_info_changed) 256 local->ops->link_info_changed(&local->hw, &sdata->vif, 257 &sdata->vif.bss_conf, ch); 258 } 259 260 if (local->ops->bss_info_changed) 261 local->ops->bss_info_changed(&local->hw, &sdata->vif, 262 &sdata->vif.bss_conf, changed); 263 trace_drv_return_void(local); 264 } 265 266 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 267 u64 changed) 268 { 269 struct ieee80211_local *local = sdata->local; 270 271 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 272 273 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 274 return; 275 276 drv_vif_cfg_changed(local, sdata, changed); 277 } 278 279 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 280 struct ieee80211_link_data *link, 281 u64 changed) 282 { 283 struct ieee80211_local *local = sdata->local; 284 285 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 286 287 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 288 return; 289 290 if (!check_sdata_in_driver(sdata)) 291 return; 292 293 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 294 } 295 296 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 297 { 298 sdata->vif.bss_conf.use_cts_prot = false; 299 sdata->vif.bss_conf.use_short_preamble = false; 300 sdata->vif.bss_conf.use_short_slot = false; 301 return BSS_CHANGED_ERP_CTS_PROT | 302 BSS_CHANGED_ERP_PREAMBLE | 303 BSS_CHANGED_ERP_SLOT; 304 } 305 306 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 307 { 308 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 309 struct sk_buff *skb; 310 311 while ((skb = skb_dequeue(&local->skb_queue)) || 312 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 313 switch (skb->pkt_type) { 314 case IEEE80211_RX_MSG: 315 /* Clear skb->pkt_type in order to not confuse kernel 316 * netstack. */ 317 skb->pkt_type = 0; 318 ieee80211_rx(&local->hw, skb); 319 break; 320 case IEEE80211_TX_STATUS_MSG: 321 skb->pkt_type = 0; 322 ieee80211_tx_status_skb(&local->hw, skb); 323 break; 324 default: 325 WARN(1, "mac80211: Packet is of unknown type %d\n", 326 skb->pkt_type); 327 dev_kfree_skb(skb); 328 break; 329 } 330 } 331 } 332 333 static void ieee80211_restart_work(struct work_struct *work) 334 { 335 struct ieee80211_local *local = 336 container_of(work, struct ieee80211_local, restart_work); 337 struct ieee80211_sub_if_data *sdata; 338 int ret; 339 340 flush_workqueue(local->workqueue); 341 342 rtnl_lock(); 343 /* we might do interface manipulations, so need both */ 344 wiphy_lock(local->hw.wiphy); 345 wiphy_work_flush(local->hw.wiphy, NULL); 346 347 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 348 "%s called with hardware scan in progress\n", __func__); 349 350 list_for_each_entry(sdata, &local->interfaces, list) { 351 /* 352 * XXX: there may be more work for other vif types and even 353 * for station mode: a good thing would be to run most of 354 * the iface type's dependent _stop (ieee80211_mg_stop, 355 * ieee80211_ibss_stop) etc... 356 * For now, fix only the specific bug that was seen: race 357 * between csa_connection_drop_work and us. 358 */ 359 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 360 /* 361 * This worker is scheduled from the iface worker that 362 * runs on mac80211's workqueue, so we can't be 363 * scheduling this worker after the cancel right here. 364 * The exception is ieee80211_chswitch_done. 365 * Then we can have a race... 366 */ 367 wiphy_work_cancel(local->hw.wiphy, 368 &sdata->u.mgd.csa_connection_drop_work); 369 if (sdata->vif.bss_conf.csa_active) 370 ieee80211_sta_connection_lost(sdata, 371 WLAN_REASON_UNSPECIFIED, 372 false); 373 } 374 wiphy_delayed_work_flush(local->hw.wiphy, 375 &sdata->dec_tailroom_needed_wk); 376 } 377 ieee80211_scan_cancel(local); 378 379 /* make sure any new ROC will consider local->in_reconfig */ 380 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 381 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 382 383 /* wait for all packet processing to be done */ 384 synchronize_net(); 385 386 ret = ieee80211_reconfig(local); 387 wiphy_unlock(local->hw.wiphy); 388 389 if (ret) 390 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 391 392 rtnl_unlock(); 393 } 394 395 void ieee80211_restart_hw(struct ieee80211_hw *hw) 396 { 397 struct ieee80211_local *local = hw_to_local(hw); 398 399 trace_api_restart_hw(local); 400 401 wiphy_info(hw->wiphy, 402 "Hardware restart was requested\n"); 403 404 /* use this reason, ieee80211_reconfig will unblock it */ 405 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 406 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 407 false); 408 409 /* 410 * Stop all Rx during the reconfig. We don't want state changes 411 * or driver callbacks while this is in progress. 412 */ 413 local->in_reconfig = true; 414 barrier(); 415 416 queue_work(system_freezable_wq, &local->restart_work); 417 } 418 EXPORT_SYMBOL(ieee80211_restart_hw); 419 420 #ifdef CONFIG_INET 421 static int ieee80211_ifa_changed(struct notifier_block *nb, 422 unsigned long data, void *arg) 423 { 424 struct in_ifaddr *ifa = arg; 425 struct ieee80211_local *local = 426 container_of(nb, struct ieee80211_local, 427 ifa_notifier); 428 struct net_device *ndev = ifa->ifa_dev->dev; 429 struct wireless_dev *wdev = ndev->ieee80211_ptr; 430 struct in_device *idev; 431 struct ieee80211_sub_if_data *sdata; 432 struct ieee80211_vif_cfg *vif_cfg; 433 struct ieee80211_if_managed *ifmgd; 434 int c = 0; 435 436 /* Make sure it's our interface that got changed */ 437 if (!wdev) 438 return NOTIFY_DONE; 439 440 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 441 return NOTIFY_DONE; 442 443 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 444 vif_cfg = &sdata->vif.cfg; 445 446 /* ARP filtering is only supported in managed mode */ 447 if (sdata->vif.type != NL80211_IFTYPE_STATION) 448 return NOTIFY_DONE; 449 450 idev = __in_dev_get_rtnl(sdata->dev); 451 if (!idev) 452 return NOTIFY_DONE; 453 454 ifmgd = &sdata->u.mgd; 455 456 /* 457 * The nested here is needed to convince lockdep that this is 458 * all OK. Yes, we lock the wiphy mutex here while we already 459 * hold the notifier rwsem, that's the normal case. And yes, 460 * we also acquire the notifier rwsem again when unregistering 461 * a netdev while we already hold the wiphy mutex, so it does 462 * look like a typical ABBA deadlock. 463 * 464 * However, both of these things happen with the RTNL held 465 * already. Therefore, they can't actually happen, since the 466 * lock orders really are ABC and ACB, which is fine due to 467 * the RTNL (A). 468 * 469 * We still need to prevent recursion, which is accomplished 470 * by the !wdev->registered check above. 471 */ 472 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 473 __acquire(&local->hw.wiphy->mtx); 474 475 /* Copy the addresses to the vif config list */ 476 ifa = rtnl_dereference(idev->ifa_list); 477 while (ifa) { 478 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 479 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 480 ifa = rtnl_dereference(ifa->ifa_next); 481 c++; 482 } 483 484 vif_cfg->arp_addr_cnt = c; 485 486 /* Configure driver only if associated (which also implies it is up) */ 487 if (ifmgd->associated) 488 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 489 490 wiphy_unlock(local->hw.wiphy); 491 492 return NOTIFY_OK; 493 } 494 #endif 495 496 #if IS_ENABLED(CONFIG_IPV6) 497 static int ieee80211_ifa6_changed(struct notifier_block *nb, 498 unsigned long data, void *arg) 499 { 500 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 501 struct inet6_dev *idev = ifa->idev; 502 struct net_device *ndev = ifa->idev->dev; 503 struct ieee80211_local *local = 504 container_of(nb, struct ieee80211_local, ifa6_notifier); 505 struct wireless_dev *wdev = ndev->ieee80211_ptr; 506 struct ieee80211_sub_if_data *sdata; 507 508 /* Make sure it's our interface that got changed */ 509 if (!wdev || wdev->wiphy != local->hw.wiphy) 510 return NOTIFY_DONE; 511 512 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 513 514 /* 515 * For now only support station mode. This is mostly because 516 * doing AP would have to handle AP_VLAN in some way ... 517 */ 518 if (sdata->vif.type != NL80211_IFTYPE_STATION) 519 return NOTIFY_DONE; 520 521 drv_ipv6_addr_change(local, sdata, idev); 522 523 return NOTIFY_OK; 524 } 525 #endif 526 527 /* There isn't a lot of sense in it, but you can transmit anything you like */ 528 static const struct ieee80211_txrx_stypes 529 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 530 [NL80211_IFTYPE_ADHOC] = { 531 .tx = 0xffff, 532 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 533 BIT(IEEE80211_STYPE_AUTH >> 4) | 534 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 535 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 536 }, 537 [NL80211_IFTYPE_STATION] = { 538 .tx = 0xffff, 539 /* 540 * To support Pre Association Security Negotiation (PASN) while 541 * already associated to one AP, allow user space to register to 542 * Rx authentication frames, so that the user space logic would 543 * be able to receive/handle authentication frames from a 544 * different AP as part of PASN. 545 * It is expected that user space would intelligently register 546 * for Rx authentication frames, i.e., only when PASN is used 547 * and configure a match filter only for PASN authentication 548 * algorithm, as otherwise the MLME functionality of mac80211 549 * would be broken. 550 */ 551 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 552 BIT(IEEE80211_STYPE_AUTH >> 4) | 553 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 554 }, 555 [NL80211_IFTYPE_AP] = { 556 .tx = 0xffff, 557 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 558 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 559 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 560 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 561 BIT(IEEE80211_STYPE_AUTH >> 4) | 562 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 563 BIT(IEEE80211_STYPE_ACTION >> 4), 564 }, 565 [NL80211_IFTYPE_AP_VLAN] = { 566 /* copy AP */ 567 .tx = 0xffff, 568 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 569 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 570 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 571 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 572 BIT(IEEE80211_STYPE_AUTH >> 4) | 573 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 574 BIT(IEEE80211_STYPE_ACTION >> 4), 575 }, 576 [NL80211_IFTYPE_P2P_CLIENT] = { 577 .tx = 0xffff, 578 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 579 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 580 }, 581 [NL80211_IFTYPE_P2P_GO] = { 582 .tx = 0xffff, 583 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 584 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 585 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 586 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 587 BIT(IEEE80211_STYPE_AUTH >> 4) | 588 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 589 BIT(IEEE80211_STYPE_ACTION >> 4), 590 }, 591 [NL80211_IFTYPE_MESH_POINT] = { 592 .tx = 0xffff, 593 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 594 BIT(IEEE80211_STYPE_AUTH >> 4) | 595 BIT(IEEE80211_STYPE_DEAUTH >> 4), 596 }, 597 [NL80211_IFTYPE_P2P_DEVICE] = { 598 .tx = 0xffff, 599 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 600 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 601 }, 602 }; 603 604 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 605 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 606 IEEE80211_HT_AMPDU_PARM_DENSITY, 607 608 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 609 IEEE80211_HT_CAP_MAX_AMSDU | 610 IEEE80211_HT_CAP_SGI_20 | 611 IEEE80211_HT_CAP_SGI_40 | 612 IEEE80211_HT_CAP_TX_STBC | 613 IEEE80211_HT_CAP_RX_STBC | 614 IEEE80211_HT_CAP_LDPC_CODING | 615 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 616 .mcs = { 617 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 618 0xff, 0xff, 0xff, 0xff, 0xff, }, 619 }, 620 }; 621 622 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 623 .vht_cap_info = 624 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 625 IEEE80211_VHT_CAP_SHORT_GI_80 | 626 IEEE80211_VHT_CAP_SHORT_GI_160 | 627 IEEE80211_VHT_CAP_RXSTBC_MASK | 628 IEEE80211_VHT_CAP_TXSTBC | 629 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 630 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 631 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 632 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 633 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 634 .supp_mcs = { 635 .rx_mcs_map = cpu_to_le16(~0), 636 .tx_mcs_map = cpu_to_le16(~0), 637 }, 638 }; 639 640 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 641 const struct ieee80211_ops *ops, 642 const char *requested_name) 643 { 644 struct ieee80211_local *local; 645 int priv_size, i; 646 struct wiphy *wiphy; 647 bool use_chanctx; 648 649 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 650 !ops->add_interface || !ops->remove_interface || 651 !ops->configure_filter || !ops->wake_tx_queue)) 652 return NULL; 653 654 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 655 return NULL; 656 657 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 658 (ops->link_info_changed && ops->bss_info_changed))) 659 return NULL; 660 661 /* check all or no channel context operations exist */ 662 i = !!ops->add_chanctx + !!ops->remove_chanctx + 663 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 664 !!ops->unassign_vif_chanctx; 665 if (WARN_ON(i != 0 && i != 5)) 666 return NULL; 667 use_chanctx = i == 5; 668 669 /* Ensure 32-byte alignment of our private data and hw private data. 670 * We use the wiphy priv data for both our ieee80211_local and for 671 * the driver's private data 672 * 673 * In memory it'll be like this: 674 * 675 * +-------------------------+ 676 * | struct wiphy | 677 * +-------------------------+ 678 * | struct ieee80211_local | 679 * +-------------------------+ 680 * | driver's private data | 681 * +-------------------------+ 682 * 683 */ 684 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 685 686 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 687 688 if (!wiphy) 689 return NULL; 690 691 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 692 693 wiphy->privid = mac80211_wiphy_privid; 694 695 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 696 WIPHY_FLAG_4ADDR_AP | 697 WIPHY_FLAG_4ADDR_STATION | 698 WIPHY_FLAG_REPORTS_OBSS | 699 WIPHY_FLAG_OFFCHAN_TX; 700 701 if (!use_chanctx || ops->remain_on_channel) 702 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 703 704 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 705 NL80211_FEATURE_SAE | 706 NL80211_FEATURE_HT_IBSS | 707 NL80211_FEATURE_VIF_TXPOWER | 708 NL80211_FEATURE_MAC_ON_CREATE | 709 NL80211_FEATURE_USERSPACE_MPM | 710 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 711 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 712 wiphy_ext_feature_set(wiphy, 713 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 714 wiphy_ext_feature_set(wiphy, 715 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 716 wiphy_ext_feature_set(wiphy, 717 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 718 wiphy_ext_feature_set(wiphy, 719 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 720 wiphy_ext_feature_set(wiphy, 721 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 722 723 if (!ops->hw_scan) { 724 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 725 NL80211_FEATURE_AP_SCAN; 726 /* 727 * if the driver behaves correctly using the probe request 728 * (template) from mac80211, then both of these should be 729 * supported even with hw scan - but let drivers opt in. 730 */ 731 wiphy_ext_feature_set(wiphy, 732 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 733 wiphy_ext_feature_set(wiphy, 734 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 735 } 736 737 if (!ops->set_key) 738 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 739 740 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 741 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 742 743 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 744 745 local = wiphy_priv(wiphy); 746 747 if (sta_info_init(local)) 748 goto err_free; 749 750 local->hw.wiphy = wiphy; 751 752 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 753 754 local->ops = ops; 755 local->use_chanctx = use_chanctx; 756 757 /* 758 * We need a bit of data queued to build aggregates properly, so 759 * instruct the TCP stack to allow more than a single ms of data 760 * to be queued in the stack. The value is a bit-shift of 1 761 * second, so 7 is ~8ms of queued data. Only affects local TCP 762 * sockets. 763 * This is the default, anyhow - drivers may need to override it 764 * for local reasons (longer buffers, longer completion time, or 765 * similar). 766 */ 767 local->hw.tx_sk_pacing_shift = 7; 768 769 /* set up some defaults */ 770 local->hw.queues = 1; 771 local->hw.max_rates = 1; 772 local->hw.max_report_rates = 0; 773 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 774 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 775 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 776 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 777 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 778 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 779 IEEE80211_RADIOTAP_MCS_HAVE_GI | 780 IEEE80211_RADIOTAP_MCS_HAVE_BW; 781 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 782 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 783 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 784 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 785 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 786 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 787 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 788 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 789 790 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 791 792 wiphy->extended_capabilities = local->ext_capa; 793 wiphy->extended_capabilities_mask = local->ext_capa; 794 wiphy->extended_capabilities_len = 795 ARRAY_SIZE(local->ext_capa); 796 797 INIT_LIST_HEAD(&local->interfaces); 798 INIT_LIST_HEAD(&local->mon_list); 799 800 __hw_addr_init(&local->mc_list); 801 802 mutex_init(&local->iflist_mtx); 803 spin_lock_init(&local->filter_lock); 804 spin_lock_init(&local->rx_path_lock); 805 spin_lock_init(&local->queue_stop_reason_lock); 806 807 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 808 INIT_LIST_HEAD(&local->active_txqs[i]); 809 spin_lock_init(&local->active_txq_lock[i]); 810 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 811 local->aql_txq_limit_high[i] = 812 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 813 atomic_set(&local->aql_ac_pending_airtime[i], 0); 814 } 815 816 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 817 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 818 atomic_set(&local->aql_total_pending_airtime, 0); 819 820 spin_lock_init(&local->handle_wake_tx_queue_lock); 821 822 INIT_LIST_HEAD(&local->chanctx_list); 823 824 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 825 826 INIT_WORK(&local->restart_work, ieee80211_restart_work); 827 828 wiphy_work_init(&local->radar_detected_work, 829 ieee80211_dfs_radar_detected_work); 830 831 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 832 local->smps_mode = IEEE80211_SMPS_OFF; 833 834 wiphy_work_init(&local->dynamic_ps_enable_work, 835 ieee80211_dynamic_ps_enable_work); 836 wiphy_work_init(&local->dynamic_ps_disable_work, 837 ieee80211_dynamic_ps_disable_work); 838 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 839 840 wiphy_work_init(&local->sched_scan_stopped_work, 841 ieee80211_sched_scan_stopped_work); 842 843 spin_lock_init(&local->ack_status_lock); 844 idr_init(&local->ack_status_frames); 845 846 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 847 skb_queue_head_init(&local->pending[i]); 848 atomic_set(&local->agg_queue_stop[i], 0); 849 } 850 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 851 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 852 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 853 854 skb_queue_head_init(&local->skb_queue); 855 skb_queue_head_init(&local->skb_queue_unreliable); 856 857 ieee80211_alloc_led_names(local); 858 859 ieee80211_roc_setup(local); 860 861 local->hw.radiotap_timestamp.units_pos = -1; 862 local->hw.radiotap_timestamp.accuracy = -1; 863 864 return &local->hw; 865 err_free: 866 wiphy_free(wiphy); 867 return NULL; 868 } 869 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 870 871 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 872 { 873 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 874 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 875 int r = 0, w = 0; 876 u32 *suites; 877 static const u32 cipher_suites[] = { 878 /* keep WEP first, it may be removed below */ 879 WLAN_CIPHER_SUITE_WEP40, 880 WLAN_CIPHER_SUITE_WEP104, 881 WLAN_CIPHER_SUITE_TKIP, 882 WLAN_CIPHER_SUITE_CCMP, 883 WLAN_CIPHER_SUITE_CCMP_256, 884 WLAN_CIPHER_SUITE_GCMP, 885 WLAN_CIPHER_SUITE_GCMP_256, 886 887 /* keep last -- depends on hw flags! */ 888 WLAN_CIPHER_SUITE_AES_CMAC, 889 WLAN_CIPHER_SUITE_BIP_CMAC_256, 890 WLAN_CIPHER_SUITE_BIP_GMAC_128, 891 WLAN_CIPHER_SUITE_BIP_GMAC_256, 892 }; 893 894 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 895 local->hw.wiphy->cipher_suites) { 896 /* If the driver advertises, or doesn't support SW crypto, 897 * we only need to remove WEP if necessary. 898 */ 899 if (have_wep) 900 return 0; 901 902 /* well if it has _no_ ciphers ... fine */ 903 if (!local->hw.wiphy->n_cipher_suites) 904 return 0; 905 906 /* Driver provides cipher suites, but we need to exclude WEP */ 907 suites = kmemdup(local->hw.wiphy->cipher_suites, 908 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 909 GFP_KERNEL); 910 if (!suites) 911 return -ENOMEM; 912 913 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 914 u32 suite = local->hw.wiphy->cipher_suites[r]; 915 916 if (suite == WLAN_CIPHER_SUITE_WEP40 || 917 suite == WLAN_CIPHER_SUITE_WEP104) 918 continue; 919 suites[w++] = suite; 920 } 921 } else { 922 /* assign the (software supported and perhaps offloaded) 923 * cipher suites 924 */ 925 local->hw.wiphy->cipher_suites = cipher_suites; 926 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 927 928 if (!have_mfp) 929 local->hw.wiphy->n_cipher_suites -= 4; 930 931 if (!have_wep) { 932 local->hw.wiphy->cipher_suites += 2; 933 local->hw.wiphy->n_cipher_suites -= 2; 934 } 935 936 /* not dynamically allocated, so just return */ 937 return 0; 938 } 939 940 local->hw.wiphy->cipher_suites = suites; 941 local->hw.wiphy->n_cipher_suites = w; 942 local->wiphy_ciphers_allocated = true; 943 944 return 0; 945 } 946 947 int ieee80211_register_hw(struct ieee80211_hw *hw) 948 { 949 struct ieee80211_local *local = hw_to_local(hw); 950 int result, i; 951 enum nl80211_band band; 952 int channels, max_bitrates; 953 bool supp_ht, supp_vht, supp_he, supp_eht; 954 struct cfg80211_chan_def dflt_chandef = {}; 955 956 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 957 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 958 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 959 return -EINVAL; 960 961 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 962 (!local->ops->tdls_channel_switch || 963 !local->ops->tdls_cancel_channel_switch || 964 !local->ops->tdls_recv_channel_switch)) 965 return -EOPNOTSUPP; 966 967 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 968 !local->ops->set_frag_threshold)) 969 return -EINVAL; 970 971 if (WARN_ON(local->hw.wiphy->interface_modes & 972 BIT(NL80211_IFTYPE_NAN) && 973 (!local->ops->start_nan || !local->ops->stop_nan))) 974 return -EINVAL; 975 976 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 977 /* 978 * For drivers capable of doing MLO, assume modern driver 979 * or firmware facilities, so software doesn't have to do 980 * as much, e.g. monitoring beacons would be hard if we 981 * might not even know which link is active at which time. 982 */ 983 if (WARN_ON(!local->use_chanctx)) 984 return -EINVAL; 985 986 if (WARN_ON(!local->ops->link_info_changed)) 987 return -EINVAL; 988 989 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 990 return -EINVAL; 991 992 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 993 return -EINVAL; 994 995 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 996 return -EINVAL; 997 998 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 999 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1000 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1001 return -EINVAL; 1002 1003 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1004 return -EINVAL; 1005 1006 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1007 return -EINVAL; 1008 1009 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1010 return -EINVAL; 1011 1012 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1013 return -EINVAL; 1014 1015 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1016 return -EINVAL; 1017 1018 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1019 return -EINVAL; 1020 } 1021 1022 #ifdef CONFIG_PM 1023 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1024 return -EINVAL; 1025 #endif 1026 1027 if (!local->use_chanctx) { 1028 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1029 const struct ieee80211_iface_combination *comb; 1030 1031 comb = &local->hw.wiphy->iface_combinations[i]; 1032 1033 if (comb->num_different_channels > 1) 1034 return -EINVAL; 1035 } 1036 } else { 1037 /* DFS is not supported with multi-channel combinations yet */ 1038 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1039 const struct ieee80211_iface_combination *comb; 1040 1041 comb = &local->hw.wiphy->iface_combinations[i]; 1042 1043 if (comb->radar_detect_widths && 1044 comb->num_different_channels > 1) 1045 return -EINVAL; 1046 } 1047 } 1048 1049 /* Only HW csum features are currently compatible with mac80211 */ 1050 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1051 return -EINVAL; 1052 1053 if (hw->max_report_rates == 0) 1054 hw->max_report_rates = hw->max_rates; 1055 1056 local->rx_chains = 1; 1057 1058 /* 1059 * generic code guarantees at least one band, 1060 * set this very early because much code assumes 1061 * that hw.conf.channel is assigned 1062 */ 1063 channels = 0; 1064 max_bitrates = 0; 1065 supp_ht = false; 1066 supp_vht = false; 1067 supp_he = false; 1068 supp_eht = false; 1069 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1070 const struct ieee80211_sband_iftype_data *iftd; 1071 struct ieee80211_supported_band *sband; 1072 1073 sband = local->hw.wiphy->bands[band]; 1074 if (!sband) 1075 continue; 1076 1077 if (!dflt_chandef.chan) { 1078 /* 1079 * Assign the first enabled channel to dflt_chandef 1080 * from the list of channels 1081 */ 1082 for (i = 0; i < sband->n_channels; i++) 1083 if (!(sband->channels[i].flags & 1084 IEEE80211_CHAN_DISABLED)) 1085 break; 1086 /* if none found then use the first anyway */ 1087 if (i == sband->n_channels) 1088 i = 0; 1089 cfg80211_chandef_create(&dflt_chandef, 1090 &sband->channels[i], 1091 NL80211_CHAN_NO_HT); 1092 /* init channel we're on */ 1093 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1094 local->hw.conf.chandef = dflt_chandef; 1095 local->_oper_chandef = dflt_chandef; 1096 } 1097 local->monitor_chandef = dflt_chandef; 1098 } 1099 1100 channels += sband->n_channels; 1101 1102 /* 1103 * Due to the way the aggregation code handles this and it 1104 * being an HT capability, we can't really support delayed 1105 * BA in MLO (yet). 1106 */ 1107 if (WARN_ON(sband->ht_cap.ht_supported && 1108 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1109 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1110 return -EINVAL; 1111 1112 if (max_bitrates < sband->n_bitrates) 1113 max_bitrates = sband->n_bitrates; 1114 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1115 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1116 1117 for_each_sband_iftype_data(sband, i, iftd) { 1118 supp_he = supp_he || iftd->he_cap.has_he; 1119 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1120 } 1121 1122 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1123 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1124 (supp_ht || supp_vht || supp_he))) 1125 return -EINVAL; 1126 1127 /* EHT requires HE support */ 1128 if (WARN_ON(supp_eht && !supp_he)) 1129 return -EINVAL; 1130 1131 if (!sband->ht_cap.ht_supported) 1132 continue; 1133 1134 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1135 local->rx_chains = 1136 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1137 local->rx_chains); 1138 1139 /* no need to mask, SM_PS_DISABLED has all bits set */ 1140 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1141 IEEE80211_HT_CAP_SM_PS_SHIFT; 1142 } 1143 1144 /* if low-level driver supports AP, we also support VLAN. 1145 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1146 * based on their support to transmit SW encrypted packets. 1147 */ 1148 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1149 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1150 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1151 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1152 } 1153 1154 /* mac80211 always supports monitor */ 1155 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1156 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1157 1158 /* mac80211 doesn't support more than one IBSS interface right now */ 1159 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1160 const struct ieee80211_iface_combination *c; 1161 int j; 1162 1163 c = &hw->wiphy->iface_combinations[i]; 1164 1165 for (j = 0; j < c->n_limits; j++) 1166 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1167 c->limits[j].max > 1) 1168 return -EINVAL; 1169 } 1170 1171 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1172 sizeof(void *) * channels, GFP_KERNEL); 1173 if (!local->int_scan_req) 1174 return -ENOMEM; 1175 1176 eth_broadcast_addr(local->int_scan_req->bssid); 1177 1178 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1179 if (!local->hw.wiphy->bands[band]) 1180 continue; 1181 local->int_scan_req->rates[band] = (u32) -1; 1182 } 1183 1184 #ifndef CONFIG_MAC80211_MESH 1185 /* mesh depends on Kconfig, but drivers should set it if they want */ 1186 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1187 #endif 1188 1189 /* if the underlying driver supports mesh, mac80211 will (at least) 1190 * provide routing of mesh authentication frames to userspace */ 1191 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1192 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1193 1194 /* mac80211 supports control port protocol changing */ 1195 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1196 1197 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1198 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1199 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1200 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1201 if (hw->max_signal <= 0) { 1202 result = -EINVAL; 1203 goto fail_workqueue; 1204 } 1205 } 1206 1207 /* Mac80211 and therefore all drivers using SW crypto only 1208 * are able to handle PTK rekeys and Extended Key ID. 1209 */ 1210 if (!local->ops->set_key) { 1211 wiphy_ext_feature_set(local->hw.wiphy, 1212 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1213 wiphy_ext_feature_set(local->hw.wiphy, 1214 NL80211_EXT_FEATURE_EXT_KEY_ID); 1215 } 1216 1217 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1218 wiphy_ext_feature_set(local->hw.wiphy, 1219 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1220 1221 /* 1222 * Calculate scan IE length -- we need this to alloc 1223 * memory and to subtract from the driver limit. It 1224 * includes the DS Params, (extended) supported rates, and HT 1225 * information -- SSID is the driver's responsibility. 1226 */ 1227 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1228 3 /* DS Params */; 1229 if (supp_ht) 1230 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1231 1232 if (supp_vht) 1233 local->scan_ies_len += 1234 2 + sizeof(struct ieee80211_vht_cap); 1235 1236 /* 1237 * HE cap element is variable in size - set len to allow max size */ 1238 if (supp_he) { 1239 local->scan_ies_len += 1240 3 + sizeof(struct ieee80211_he_cap_elem) + 1241 sizeof(struct ieee80211_he_mcs_nss_supp) + 1242 IEEE80211_HE_PPE_THRES_MAX_LEN; 1243 1244 if (supp_eht) 1245 local->scan_ies_len += 1246 3 + sizeof(struct ieee80211_eht_cap_elem) + 1247 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1248 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1249 } 1250 1251 if (!local->ops->hw_scan) { 1252 /* For hw_scan, driver needs to set these up. */ 1253 local->hw.wiphy->max_scan_ssids = 4; 1254 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1255 } 1256 1257 /* 1258 * If the driver supports any scan IEs, then assume the 1259 * limit includes the IEs mac80211 will add, otherwise 1260 * leave it at zero and let the driver sort it out; we 1261 * still pass our IEs to the driver but userspace will 1262 * not be allowed to in that case. 1263 */ 1264 if (local->hw.wiphy->max_scan_ie_len) 1265 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1266 1267 result = ieee80211_init_cipher_suites(local); 1268 if (result < 0) 1269 goto fail_workqueue; 1270 1271 if (!local->ops->remain_on_channel) 1272 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1273 1274 /* mac80211 based drivers don't support internal TDLS setup */ 1275 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1276 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1277 1278 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1279 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1280 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1281 1282 /* mac80211 supports multi BSSID, if the driver supports it */ 1283 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1284 local->hw.wiphy->support_mbssid = true; 1285 if (ieee80211_hw_check(&local->hw, 1286 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1287 local->hw.wiphy->support_only_he_mbssid = true; 1288 else 1289 local->ext_capa[2] |= 1290 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1291 } 1292 1293 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1294 1295 /* 1296 * We use the number of queues for feature tests (QoS, HT) internally 1297 * so restrict them appropriately. 1298 */ 1299 if (hw->queues > IEEE80211_MAX_QUEUES) 1300 hw->queues = IEEE80211_MAX_QUEUES; 1301 1302 local->workqueue = 1303 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1304 if (!local->workqueue) { 1305 result = -ENOMEM; 1306 goto fail_workqueue; 1307 } 1308 1309 /* 1310 * The hardware needs headroom for sending the frame, 1311 * and we need some headroom for passing the frame to monitor 1312 * interfaces, but never both at the same time. 1313 */ 1314 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1315 IEEE80211_TX_STATUS_HEADROOM); 1316 1317 /* 1318 * if the driver doesn't specify a max listen interval we 1319 * use 5 which should be a safe default 1320 */ 1321 if (local->hw.max_listen_interval == 0) 1322 local->hw.max_listen_interval = 5; 1323 1324 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1325 1326 local->dynamic_ps_forced_timeout = -1; 1327 1328 if (!local->hw.max_nan_de_entries) 1329 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1330 1331 if (!local->hw.weight_multiplier) 1332 local->hw.weight_multiplier = 1; 1333 1334 ieee80211_wep_init(local); 1335 1336 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1337 1338 ieee80211_led_init(local); 1339 1340 result = ieee80211_txq_setup_flows(local); 1341 if (result) 1342 goto fail_flows; 1343 1344 rtnl_lock(); 1345 result = ieee80211_init_rate_ctrl_alg(local, 1346 hw->rate_control_algorithm); 1347 rtnl_unlock(); 1348 if (result < 0) { 1349 wiphy_debug(local->hw.wiphy, 1350 "Failed to initialize rate control algorithm\n"); 1351 goto fail_rate; 1352 } 1353 1354 if (local->rate_ctrl) { 1355 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1356 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1357 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1358 } 1359 1360 /* 1361 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1362 * or have it when we don't, copy the sband structure and set/clear it. 1363 * This is necessary because rate scaling algorithms could be switched 1364 * and have different support values. 1365 * Print a message so that in the common case the reallocation can be 1366 * avoided. 1367 */ 1368 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1369 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1370 struct ieee80211_supported_band *sband; 1371 bool local_cap, ie_cap; 1372 1373 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1374 1375 sband = local->hw.wiphy->bands[band]; 1376 if (!sband || !sband->vht_cap.vht_supported) 1377 continue; 1378 1379 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1380 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1381 1382 if (local_cap == ie_cap) 1383 continue; 1384 1385 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1386 if (!sband) { 1387 result = -ENOMEM; 1388 goto fail_rate; 1389 } 1390 1391 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1392 band); 1393 1394 sband->vht_cap.vht_mcs.tx_highest ^= 1395 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1396 1397 local->hw.wiphy->bands[band] = sband; 1398 local->sband_allocated |= BIT(band); 1399 } 1400 1401 result = wiphy_register(local->hw.wiphy); 1402 if (result < 0) 1403 goto fail_wiphy_register; 1404 1405 debugfs_hw_add(local); 1406 rate_control_add_debugfs(local); 1407 1408 ieee80211_check_wbrf_support(local); 1409 1410 rtnl_lock(); 1411 wiphy_lock(hw->wiphy); 1412 1413 /* add one default STA interface if supported */ 1414 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1415 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1416 struct vif_params params = {0}; 1417 1418 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1419 NL80211_IFTYPE_STATION, ¶ms); 1420 if (result) 1421 wiphy_warn(local->hw.wiphy, 1422 "Failed to add default virtual iface\n"); 1423 } 1424 1425 wiphy_unlock(hw->wiphy); 1426 rtnl_unlock(); 1427 1428 #ifdef CONFIG_INET 1429 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1430 result = register_inetaddr_notifier(&local->ifa_notifier); 1431 if (result) 1432 goto fail_ifa; 1433 #endif 1434 1435 #if IS_ENABLED(CONFIG_IPV6) 1436 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1437 result = register_inet6addr_notifier(&local->ifa6_notifier); 1438 if (result) 1439 goto fail_ifa6; 1440 #endif 1441 1442 return 0; 1443 1444 #if IS_ENABLED(CONFIG_IPV6) 1445 fail_ifa6: 1446 #ifdef CONFIG_INET 1447 unregister_inetaddr_notifier(&local->ifa_notifier); 1448 #endif 1449 #endif 1450 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1451 fail_ifa: 1452 #endif 1453 wiphy_unregister(local->hw.wiphy); 1454 fail_wiphy_register: 1455 rtnl_lock(); 1456 rate_control_deinitialize(local); 1457 ieee80211_remove_interfaces(local); 1458 rtnl_unlock(); 1459 fail_rate: 1460 ieee80211_txq_teardown_flows(local); 1461 fail_flows: 1462 ieee80211_led_exit(local); 1463 destroy_workqueue(local->workqueue); 1464 fail_workqueue: 1465 if (local->wiphy_ciphers_allocated) { 1466 kfree(local->hw.wiphy->cipher_suites); 1467 local->wiphy_ciphers_allocated = false; 1468 } 1469 kfree(local->int_scan_req); 1470 return result; 1471 } 1472 EXPORT_SYMBOL(ieee80211_register_hw); 1473 1474 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1475 { 1476 struct ieee80211_local *local = hw_to_local(hw); 1477 1478 tasklet_kill(&local->tx_pending_tasklet); 1479 tasklet_kill(&local->tasklet); 1480 1481 #ifdef CONFIG_INET 1482 unregister_inetaddr_notifier(&local->ifa_notifier); 1483 #endif 1484 #if IS_ENABLED(CONFIG_IPV6) 1485 unregister_inet6addr_notifier(&local->ifa6_notifier); 1486 #endif 1487 1488 rtnl_lock(); 1489 1490 /* 1491 * At this point, interface list manipulations are fine 1492 * because the driver cannot be handing us frames any 1493 * more and the tasklet is killed. 1494 */ 1495 ieee80211_remove_interfaces(local); 1496 1497 ieee80211_txq_teardown_flows(local); 1498 1499 wiphy_lock(local->hw.wiphy); 1500 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1501 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1502 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1503 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1504 wiphy_unlock(local->hw.wiphy); 1505 rtnl_unlock(); 1506 1507 cancel_work_sync(&local->restart_work); 1508 1509 ieee80211_clear_tx_pending(local); 1510 rate_control_deinitialize(local); 1511 1512 if (skb_queue_len(&local->skb_queue) || 1513 skb_queue_len(&local->skb_queue_unreliable)) 1514 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1515 skb_queue_purge(&local->skb_queue); 1516 skb_queue_purge(&local->skb_queue_unreliable); 1517 1518 wiphy_unregister(local->hw.wiphy); 1519 destroy_workqueue(local->workqueue); 1520 ieee80211_led_exit(local); 1521 kfree(local->int_scan_req); 1522 } 1523 EXPORT_SYMBOL(ieee80211_unregister_hw); 1524 1525 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1526 { 1527 WARN_ONCE(1, "Have pending ack frames!\n"); 1528 kfree_skb(p); 1529 return 0; 1530 } 1531 1532 void ieee80211_free_hw(struct ieee80211_hw *hw) 1533 { 1534 struct ieee80211_local *local = hw_to_local(hw); 1535 enum nl80211_band band; 1536 1537 mutex_destroy(&local->iflist_mtx); 1538 1539 if (local->wiphy_ciphers_allocated) { 1540 kfree(local->hw.wiphy->cipher_suites); 1541 local->wiphy_ciphers_allocated = false; 1542 } 1543 1544 idr_for_each(&local->ack_status_frames, 1545 ieee80211_free_ack_frame, NULL); 1546 idr_destroy(&local->ack_status_frames); 1547 1548 sta_info_stop(local); 1549 1550 ieee80211_free_led_names(local); 1551 1552 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1553 if (!(local->sband_allocated & BIT(band))) 1554 continue; 1555 kfree(local->hw.wiphy->bands[band]); 1556 } 1557 1558 wiphy_free(local->hw.wiphy); 1559 } 1560 EXPORT_SYMBOL(ieee80211_free_hw); 1561 1562 static const char * const drop_reasons_monitor[] = { 1563 #define V(x) #x, 1564 [0] = "RX_DROP_MONITOR", 1565 MAC80211_DROP_REASONS_MONITOR(V) 1566 }; 1567 1568 static struct drop_reason_list drop_reason_list_monitor = { 1569 .reasons = drop_reasons_monitor, 1570 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1571 }; 1572 1573 static const char * const drop_reasons_unusable[] = { 1574 [0] = "RX_DROP_UNUSABLE", 1575 MAC80211_DROP_REASONS_UNUSABLE(V) 1576 #undef V 1577 }; 1578 1579 static struct drop_reason_list drop_reason_list_unusable = { 1580 .reasons = drop_reasons_unusable, 1581 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1582 }; 1583 1584 static int __init ieee80211_init(void) 1585 { 1586 struct sk_buff *skb; 1587 int ret; 1588 1589 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1590 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1591 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1592 1593 ret = rc80211_minstrel_init(); 1594 if (ret) 1595 return ret; 1596 1597 ret = ieee80211_iface_init(); 1598 if (ret) 1599 goto err_netdev; 1600 1601 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1602 &drop_reason_list_monitor); 1603 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1604 &drop_reason_list_unusable); 1605 1606 return 0; 1607 err_netdev: 1608 rc80211_minstrel_exit(); 1609 1610 return ret; 1611 } 1612 1613 static void __exit ieee80211_exit(void) 1614 { 1615 rc80211_minstrel_exit(); 1616 1617 ieee80211s_stop(); 1618 1619 ieee80211_iface_exit(); 1620 1621 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1622 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1623 1624 rcu_barrier(); 1625 } 1626 1627 1628 subsys_initcall(ieee80211_init); 1629 module_exit(ieee80211_exit); 1630 1631 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1632 MODULE_LICENSE("GPL"); 1633