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 BSS_CHANGED_MLD_TTLM) 213 214 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 215 u64 changed) 216 { 217 struct ieee80211_local *local = sdata->local; 218 219 might_sleep(); 220 221 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 222 return; 223 224 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 225 BSS_CHANGED_BEACON_ENABLED) && 226 sdata->vif.type != NL80211_IFTYPE_AP && 227 sdata->vif.type != NL80211_IFTYPE_ADHOC && 228 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 229 sdata->vif.type != NL80211_IFTYPE_OCB)) 230 return; 231 232 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 233 sdata->vif.type == NL80211_IFTYPE_NAN || 234 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 235 !sdata->vif.bss_conf.mu_mimo_owner && 236 !(changed & BSS_CHANGED_TXPOWER)))) 237 return; 238 239 if (!check_sdata_in_driver(sdata)) 240 return; 241 242 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 243 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 244 245 trace_drv_vif_cfg_changed(local, sdata, changed); 246 if (local->ops->vif_cfg_changed) 247 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 248 } 249 250 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 251 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 252 253 /* FIXME: should be for each link */ 254 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 255 changed); 256 if (local->ops->link_info_changed) 257 local->ops->link_info_changed(&local->hw, &sdata->vif, 258 &sdata->vif.bss_conf, ch); 259 } 260 261 if (local->ops->bss_info_changed) 262 local->ops->bss_info_changed(&local->hw, &sdata->vif, 263 &sdata->vif.bss_conf, changed); 264 trace_drv_return_void(local); 265 } 266 267 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 268 u64 changed) 269 { 270 struct ieee80211_local *local = sdata->local; 271 272 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 273 274 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 275 return; 276 277 drv_vif_cfg_changed(local, sdata, changed); 278 } 279 280 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 281 struct ieee80211_link_data *link, 282 u64 changed) 283 { 284 struct ieee80211_local *local = sdata->local; 285 286 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 287 288 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 289 return; 290 291 if (!check_sdata_in_driver(sdata)) 292 return; 293 294 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 295 } 296 297 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 298 { 299 sdata->vif.bss_conf.use_cts_prot = false; 300 sdata->vif.bss_conf.use_short_preamble = false; 301 sdata->vif.bss_conf.use_short_slot = false; 302 return BSS_CHANGED_ERP_CTS_PROT | 303 BSS_CHANGED_ERP_PREAMBLE | 304 BSS_CHANGED_ERP_SLOT; 305 } 306 307 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 308 { 309 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 310 struct sk_buff *skb; 311 312 while ((skb = skb_dequeue(&local->skb_queue)) || 313 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 314 switch (skb->pkt_type) { 315 case IEEE80211_RX_MSG: 316 /* Clear skb->pkt_type in order to not confuse kernel 317 * netstack. */ 318 skb->pkt_type = 0; 319 ieee80211_rx(&local->hw, skb); 320 break; 321 case IEEE80211_TX_STATUS_MSG: 322 skb->pkt_type = 0; 323 ieee80211_tx_status_skb(&local->hw, skb); 324 break; 325 default: 326 WARN(1, "mac80211: Packet is of unknown type %d\n", 327 skb->pkt_type); 328 dev_kfree_skb(skb); 329 break; 330 } 331 } 332 } 333 334 static void ieee80211_restart_work(struct work_struct *work) 335 { 336 struct ieee80211_local *local = 337 container_of(work, struct ieee80211_local, restart_work); 338 struct ieee80211_sub_if_data *sdata; 339 int ret; 340 341 flush_workqueue(local->workqueue); 342 343 rtnl_lock(); 344 /* we might do interface manipulations, so need both */ 345 wiphy_lock(local->hw.wiphy); 346 wiphy_work_flush(local->hw.wiphy, NULL); 347 348 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 349 "%s called with hardware scan in progress\n", __func__); 350 351 list_for_each_entry(sdata, &local->interfaces, list) { 352 /* 353 * XXX: there may be more work for other vif types and even 354 * for station mode: a good thing would be to run most of 355 * the iface type's dependent _stop (ieee80211_mg_stop, 356 * ieee80211_ibss_stop) etc... 357 * For now, fix only the specific bug that was seen: race 358 * between csa_connection_drop_work and us. 359 */ 360 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 361 /* 362 * This worker is scheduled from the iface worker that 363 * runs on mac80211's workqueue, so we can't be 364 * scheduling this worker after the cancel right here. 365 * The exception is ieee80211_chswitch_done. 366 * Then we can have a race... 367 */ 368 wiphy_work_cancel(local->hw.wiphy, 369 &sdata->u.mgd.csa_connection_drop_work); 370 if (sdata->vif.bss_conf.csa_active) 371 ieee80211_sta_connection_lost(sdata, 372 WLAN_REASON_UNSPECIFIED, 373 false); 374 } 375 wiphy_delayed_work_flush(local->hw.wiphy, 376 &sdata->dec_tailroom_needed_wk); 377 } 378 ieee80211_scan_cancel(local); 379 380 /* make sure any new ROC will consider local->in_reconfig */ 381 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 382 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 383 384 /* wait for all packet processing to be done */ 385 synchronize_net(); 386 387 ret = ieee80211_reconfig(local); 388 wiphy_unlock(local->hw.wiphy); 389 390 if (ret) 391 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 392 393 rtnl_unlock(); 394 } 395 396 void ieee80211_restart_hw(struct ieee80211_hw *hw) 397 { 398 struct ieee80211_local *local = hw_to_local(hw); 399 400 trace_api_restart_hw(local); 401 402 wiphy_info(hw->wiphy, 403 "Hardware restart was requested\n"); 404 405 /* use this reason, ieee80211_reconfig will unblock it */ 406 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 407 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 408 false); 409 410 /* 411 * Stop all Rx during the reconfig. We don't want state changes 412 * or driver callbacks while this is in progress. 413 */ 414 local->in_reconfig = true; 415 barrier(); 416 417 queue_work(system_freezable_wq, &local->restart_work); 418 } 419 EXPORT_SYMBOL(ieee80211_restart_hw); 420 421 #ifdef CONFIG_INET 422 static int ieee80211_ifa_changed(struct notifier_block *nb, 423 unsigned long data, void *arg) 424 { 425 struct in_ifaddr *ifa = arg; 426 struct ieee80211_local *local = 427 container_of(nb, struct ieee80211_local, 428 ifa_notifier); 429 struct net_device *ndev = ifa->ifa_dev->dev; 430 struct wireless_dev *wdev = ndev->ieee80211_ptr; 431 struct in_device *idev; 432 struct ieee80211_sub_if_data *sdata; 433 struct ieee80211_vif_cfg *vif_cfg; 434 struct ieee80211_if_managed *ifmgd; 435 int c = 0; 436 437 /* Make sure it's our interface that got changed */ 438 if (!wdev) 439 return NOTIFY_DONE; 440 441 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 442 return NOTIFY_DONE; 443 444 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 445 vif_cfg = &sdata->vif.cfg; 446 447 /* ARP filtering is only supported in managed mode */ 448 if (sdata->vif.type != NL80211_IFTYPE_STATION) 449 return NOTIFY_DONE; 450 451 idev = __in_dev_get_rtnl(sdata->dev); 452 if (!idev) 453 return NOTIFY_DONE; 454 455 ifmgd = &sdata->u.mgd; 456 457 /* 458 * The nested here is needed to convince lockdep that this is 459 * all OK. Yes, we lock the wiphy mutex here while we already 460 * hold the notifier rwsem, that's the normal case. And yes, 461 * we also acquire the notifier rwsem again when unregistering 462 * a netdev while we already hold the wiphy mutex, so it does 463 * look like a typical ABBA deadlock. 464 * 465 * However, both of these things happen with the RTNL held 466 * already. Therefore, they can't actually happen, since the 467 * lock orders really are ABC and ACB, which is fine due to 468 * the RTNL (A). 469 * 470 * We still need to prevent recursion, which is accomplished 471 * by the !wdev->registered check above. 472 */ 473 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 474 __acquire(&local->hw.wiphy->mtx); 475 476 /* Copy the addresses to the vif config list */ 477 ifa = rtnl_dereference(idev->ifa_list); 478 while (ifa) { 479 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 480 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 481 ifa = rtnl_dereference(ifa->ifa_next); 482 c++; 483 } 484 485 vif_cfg->arp_addr_cnt = c; 486 487 /* Configure driver only if associated (which also implies it is up) */ 488 if (ifmgd->associated) 489 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 490 491 wiphy_unlock(local->hw.wiphy); 492 493 return NOTIFY_OK; 494 } 495 #endif 496 497 #if IS_ENABLED(CONFIG_IPV6) 498 static int ieee80211_ifa6_changed(struct notifier_block *nb, 499 unsigned long data, void *arg) 500 { 501 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 502 struct inet6_dev *idev = ifa->idev; 503 struct net_device *ndev = ifa->idev->dev; 504 struct ieee80211_local *local = 505 container_of(nb, struct ieee80211_local, ifa6_notifier); 506 struct wireless_dev *wdev = ndev->ieee80211_ptr; 507 struct ieee80211_sub_if_data *sdata; 508 509 /* Make sure it's our interface that got changed */ 510 if (!wdev || wdev->wiphy != local->hw.wiphy) 511 return NOTIFY_DONE; 512 513 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 514 515 /* 516 * For now only support station mode. This is mostly because 517 * doing AP would have to handle AP_VLAN in some way ... 518 */ 519 if (sdata->vif.type != NL80211_IFTYPE_STATION) 520 return NOTIFY_DONE; 521 522 drv_ipv6_addr_change(local, sdata, idev); 523 524 return NOTIFY_OK; 525 } 526 #endif 527 528 /* There isn't a lot of sense in it, but you can transmit anything you like */ 529 static const struct ieee80211_txrx_stypes 530 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 531 [NL80211_IFTYPE_ADHOC] = { 532 .tx = 0xffff, 533 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 534 BIT(IEEE80211_STYPE_AUTH >> 4) | 535 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 536 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 537 }, 538 [NL80211_IFTYPE_STATION] = { 539 .tx = 0xffff, 540 /* 541 * To support Pre Association Security Negotiation (PASN) while 542 * already associated to one AP, allow user space to register to 543 * Rx authentication frames, so that the user space logic would 544 * be able to receive/handle authentication frames from a 545 * different AP as part of PASN. 546 * It is expected that user space would intelligently register 547 * for Rx authentication frames, i.e., only when PASN is used 548 * and configure a match filter only for PASN authentication 549 * algorithm, as otherwise the MLME functionality of mac80211 550 * would be broken. 551 */ 552 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 553 BIT(IEEE80211_STYPE_AUTH >> 4) | 554 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 555 }, 556 [NL80211_IFTYPE_AP] = { 557 .tx = 0xffff, 558 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 559 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 560 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 561 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 562 BIT(IEEE80211_STYPE_AUTH >> 4) | 563 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 564 BIT(IEEE80211_STYPE_ACTION >> 4), 565 }, 566 [NL80211_IFTYPE_AP_VLAN] = { 567 /* copy AP */ 568 .tx = 0xffff, 569 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 570 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 571 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 572 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 573 BIT(IEEE80211_STYPE_AUTH >> 4) | 574 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 575 BIT(IEEE80211_STYPE_ACTION >> 4), 576 }, 577 [NL80211_IFTYPE_P2P_CLIENT] = { 578 .tx = 0xffff, 579 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 580 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 581 }, 582 [NL80211_IFTYPE_P2P_GO] = { 583 .tx = 0xffff, 584 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 585 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 586 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 587 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 588 BIT(IEEE80211_STYPE_AUTH >> 4) | 589 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 590 BIT(IEEE80211_STYPE_ACTION >> 4), 591 }, 592 [NL80211_IFTYPE_MESH_POINT] = { 593 .tx = 0xffff, 594 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 595 BIT(IEEE80211_STYPE_AUTH >> 4) | 596 BIT(IEEE80211_STYPE_DEAUTH >> 4), 597 }, 598 [NL80211_IFTYPE_P2P_DEVICE] = { 599 .tx = 0xffff, 600 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 601 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 602 }, 603 }; 604 605 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 606 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 607 IEEE80211_HT_AMPDU_PARM_DENSITY, 608 609 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 610 IEEE80211_HT_CAP_MAX_AMSDU | 611 IEEE80211_HT_CAP_SGI_20 | 612 IEEE80211_HT_CAP_SGI_40 | 613 IEEE80211_HT_CAP_TX_STBC | 614 IEEE80211_HT_CAP_RX_STBC | 615 IEEE80211_HT_CAP_LDPC_CODING | 616 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 617 .mcs = { 618 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 619 0xff, 0xff, 0xff, 0xff, 0xff, }, 620 }, 621 }; 622 623 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 624 .vht_cap_info = 625 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 626 IEEE80211_VHT_CAP_SHORT_GI_80 | 627 IEEE80211_VHT_CAP_SHORT_GI_160 | 628 IEEE80211_VHT_CAP_RXSTBC_MASK | 629 IEEE80211_VHT_CAP_TXSTBC | 630 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 631 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 632 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 633 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 634 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 635 .supp_mcs = { 636 .rx_mcs_map = cpu_to_le16(~0), 637 .tx_mcs_map = cpu_to_le16(~0), 638 }, 639 }; 640 641 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 642 const struct ieee80211_ops *ops, 643 const char *requested_name) 644 { 645 struct ieee80211_local *local; 646 int priv_size, i; 647 struct wiphy *wiphy; 648 bool use_chanctx; 649 650 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 651 !ops->add_interface || !ops->remove_interface || 652 !ops->configure_filter || !ops->wake_tx_queue)) 653 return NULL; 654 655 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 656 return NULL; 657 658 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 659 (ops->link_info_changed && ops->bss_info_changed))) 660 return NULL; 661 662 /* check all or no channel context operations exist */ 663 i = !!ops->add_chanctx + !!ops->remove_chanctx + 664 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 665 !!ops->unassign_vif_chanctx; 666 if (WARN_ON(i != 0 && i != 5)) 667 return NULL; 668 use_chanctx = i == 5; 669 670 /* Ensure 32-byte alignment of our private data and hw private data. 671 * We use the wiphy priv data for both our ieee80211_local and for 672 * the driver's private data 673 * 674 * In memory it'll be like this: 675 * 676 * +-------------------------+ 677 * | struct wiphy | 678 * +-------------------------+ 679 * | struct ieee80211_local | 680 * +-------------------------+ 681 * | driver's private data | 682 * +-------------------------+ 683 * 684 */ 685 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 686 687 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 688 689 if (!wiphy) 690 return NULL; 691 692 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 693 694 wiphy->privid = mac80211_wiphy_privid; 695 696 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 697 WIPHY_FLAG_4ADDR_AP | 698 WIPHY_FLAG_4ADDR_STATION | 699 WIPHY_FLAG_REPORTS_OBSS | 700 WIPHY_FLAG_OFFCHAN_TX; 701 702 if (!use_chanctx || ops->remain_on_channel) 703 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 704 705 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 706 NL80211_FEATURE_SAE | 707 NL80211_FEATURE_HT_IBSS | 708 NL80211_FEATURE_VIF_TXPOWER | 709 NL80211_FEATURE_MAC_ON_CREATE | 710 NL80211_FEATURE_USERSPACE_MPM | 711 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 712 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 713 wiphy_ext_feature_set(wiphy, 714 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 715 wiphy_ext_feature_set(wiphy, 716 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 717 wiphy_ext_feature_set(wiphy, 718 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 719 wiphy_ext_feature_set(wiphy, 720 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 721 wiphy_ext_feature_set(wiphy, 722 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 723 724 if (!ops->hw_scan) { 725 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 726 NL80211_FEATURE_AP_SCAN; 727 /* 728 * if the driver behaves correctly using the probe request 729 * (template) from mac80211, then both of these should be 730 * supported even with hw scan - but let drivers opt in. 731 */ 732 wiphy_ext_feature_set(wiphy, 733 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 734 wiphy_ext_feature_set(wiphy, 735 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 736 } 737 738 if (!ops->set_key) { 739 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 740 wiphy_ext_feature_set(wiphy, 741 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT); 742 } 743 744 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 745 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 746 747 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 748 749 local = wiphy_priv(wiphy); 750 751 if (sta_info_init(local)) 752 goto err_free; 753 754 local->hw.wiphy = wiphy; 755 756 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 757 758 local->ops = ops; 759 local->use_chanctx = use_chanctx; 760 761 /* 762 * We need a bit of data queued to build aggregates properly, so 763 * instruct the TCP stack to allow more than a single ms of data 764 * to be queued in the stack. The value is a bit-shift of 1 765 * second, so 7 is ~8ms of queued data. Only affects local TCP 766 * sockets. 767 * This is the default, anyhow - drivers may need to override it 768 * for local reasons (longer buffers, longer completion time, or 769 * similar). 770 */ 771 local->hw.tx_sk_pacing_shift = 7; 772 773 /* set up some defaults */ 774 local->hw.queues = 1; 775 local->hw.max_rates = 1; 776 local->hw.max_report_rates = 0; 777 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 778 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 779 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 780 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 781 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 782 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 783 IEEE80211_RADIOTAP_MCS_HAVE_GI | 784 IEEE80211_RADIOTAP_MCS_HAVE_BW; 785 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 786 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 787 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 788 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 789 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 790 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 791 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 792 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 793 794 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 795 796 wiphy->extended_capabilities = local->ext_capa; 797 wiphy->extended_capabilities_mask = local->ext_capa; 798 wiphy->extended_capabilities_len = 799 ARRAY_SIZE(local->ext_capa); 800 801 INIT_LIST_HEAD(&local->interfaces); 802 INIT_LIST_HEAD(&local->mon_list); 803 804 __hw_addr_init(&local->mc_list); 805 806 mutex_init(&local->iflist_mtx); 807 spin_lock_init(&local->filter_lock); 808 spin_lock_init(&local->rx_path_lock); 809 spin_lock_init(&local->queue_stop_reason_lock); 810 811 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 812 INIT_LIST_HEAD(&local->active_txqs[i]); 813 spin_lock_init(&local->active_txq_lock[i]); 814 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 815 local->aql_txq_limit_high[i] = 816 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 817 atomic_set(&local->aql_ac_pending_airtime[i], 0); 818 } 819 820 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 821 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 822 atomic_set(&local->aql_total_pending_airtime, 0); 823 824 spin_lock_init(&local->handle_wake_tx_queue_lock); 825 826 INIT_LIST_HEAD(&local->chanctx_list); 827 828 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 829 830 INIT_WORK(&local->restart_work, ieee80211_restart_work); 831 832 wiphy_work_init(&local->radar_detected_work, 833 ieee80211_dfs_radar_detected_work); 834 835 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 836 local->smps_mode = IEEE80211_SMPS_OFF; 837 838 wiphy_work_init(&local->dynamic_ps_enable_work, 839 ieee80211_dynamic_ps_enable_work); 840 wiphy_work_init(&local->dynamic_ps_disable_work, 841 ieee80211_dynamic_ps_disable_work); 842 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 843 844 wiphy_work_init(&local->sched_scan_stopped_work, 845 ieee80211_sched_scan_stopped_work); 846 847 spin_lock_init(&local->ack_status_lock); 848 idr_init(&local->ack_status_frames); 849 850 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 851 skb_queue_head_init(&local->pending[i]); 852 atomic_set(&local->agg_queue_stop[i], 0); 853 } 854 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 855 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 856 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 857 858 skb_queue_head_init(&local->skb_queue); 859 skb_queue_head_init(&local->skb_queue_unreliable); 860 861 ieee80211_alloc_led_names(local); 862 863 ieee80211_roc_setup(local); 864 865 local->hw.radiotap_timestamp.units_pos = -1; 866 local->hw.radiotap_timestamp.accuracy = -1; 867 868 return &local->hw; 869 err_free: 870 wiphy_free(wiphy); 871 return NULL; 872 } 873 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 874 875 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 876 { 877 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 878 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 879 int r = 0, w = 0; 880 u32 *suites; 881 static const u32 cipher_suites[] = { 882 /* keep WEP first, it may be removed below */ 883 WLAN_CIPHER_SUITE_WEP40, 884 WLAN_CIPHER_SUITE_WEP104, 885 WLAN_CIPHER_SUITE_TKIP, 886 WLAN_CIPHER_SUITE_CCMP, 887 WLAN_CIPHER_SUITE_CCMP_256, 888 WLAN_CIPHER_SUITE_GCMP, 889 WLAN_CIPHER_SUITE_GCMP_256, 890 891 /* keep last -- depends on hw flags! */ 892 WLAN_CIPHER_SUITE_AES_CMAC, 893 WLAN_CIPHER_SUITE_BIP_CMAC_256, 894 WLAN_CIPHER_SUITE_BIP_GMAC_128, 895 WLAN_CIPHER_SUITE_BIP_GMAC_256, 896 }; 897 898 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 899 local->hw.wiphy->cipher_suites) { 900 /* If the driver advertises, or doesn't support SW crypto, 901 * we only need to remove WEP if necessary. 902 */ 903 if (have_wep) 904 return 0; 905 906 /* well if it has _no_ ciphers ... fine */ 907 if (!local->hw.wiphy->n_cipher_suites) 908 return 0; 909 910 /* Driver provides cipher suites, but we need to exclude WEP */ 911 suites = kmemdup(local->hw.wiphy->cipher_suites, 912 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 913 GFP_KERNEL); 914 if (!suites) 915 return -ENOMEM; 916 917 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 918 u32 suite = local->hw.wiphy->cipher_suites[r]; 919 920 if (suite == WLAN_CIPHER_SUITE_WEP40 || 921 suite == WLAN_CIPHER_SUITE_WEP104) 922 continue; 923 suites[w++] = suite; 924 } 925 } else { 926 /* assign the (software supported and perhaps offloaded) 927 * cipher suites 928 */ 929 local->hw.wiphy->cipher_suites = cipher_suites; 930 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 931 932 if (!have_mfp) 933 local->hw.wiphy->n_cipher_suites -= 4; 934 935 if (!have_wep) { 936 local->hw.wiphy->cipher_suites += 2; 937 local->hw.wiphy->n_cipher_suites -= 2; 938 } 939 940 /* not dynamically allocated, so just return */ 941 return 0; 942 } 943 944 local->hw.wiphy->cipher_suites = suites; 945 local->hw.wiphy->n_cipher_suites = w; 946 local->wiphy_ciphers_allocated = true; 947 948 return 0; 949 } 950 951 int ieee80211_register_hw(struct ieee80211_hw *hw) 952 { 953 struct ieee80211_local *local = hw_to_local(hw); 954 int result, i; 955 enum nl80211_band band; 956 int channels, max_bitrates; 957 bool supp_ht, supp_vht, supp_he, supp_eht; 958 struct cfg80211_chan_def dflt_chandef = {}; 959 960 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 961 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 962 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 963 return -EINVAL; 964 965 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 966 (!local->ops->tdls_channel_switch || 967 !local->ops->tdls_cancel_channel_switch || 968 !local->ops->tdls_recv_channel_switch)) 969 return -EOPNOTSUPP; 970 971 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 972 !local->ops->set_frag_threshold)) 973 return -EINVAL; 974 975 if (WARN_ON(local->hw.wiphy->interface_modes & 976 BIT(NL80211_IFTYPE_NAN) && 977 (!local->ops->start_nan || !local->ops->stop_nan))) 978 return -EINVAL; 979 980 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 981 /* 982 * For drivers capable of doing MLO, assume modern driver 983 * or firmware facilities, so software doesn't have to do 984 * as much, e.g. monitoring beacons would be hard if we 985 * might not even know which link is active at which time. 986 */ 987 if (WARN_ON(!local->use_chanctx)) 988 return -EINVAL; 989 990 if (WARN_ON(!local->ops->link_info_changed)) 991 return -EINVAL; 992 993 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 994 return -EINVAL; 995 996 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 997 return -EINVAL; 998 999 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 1000 return -EINVAL; 1001 1002 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 1003 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1004 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1005 return -EINVAL; 1006 1007 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1008 return -EINVAL; 1009 1010 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1011 return -EINVAL; 1012 1013 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1014 return -EINVAL; 1015 1016 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1017 return -EINVAL; 1018 1019 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1020 return -EINVAL; 1021 1022 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1023 return -EINVAL; 1024 } 1025 1026 #ifdef CONFIG_PM 1027 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1028 return -EINVAL; 1029 #endif 1030 1031 if (!local->use_chanctx) { 1032 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1033 const struct ieee80211_iface_combination *comb; 1034 1035 comb = &local->hw.wiphy->iface_combinations[i]; 1036 1037 if (comb->num_different_channels > 1) 1038 return -EINVAL; 1039 } 1040 } else { 1041 /* DFS is not supported with multi-channel combinations yet */ 1042 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1043 const struct ieee80211_iface_combination *comb; 1044 1045 comb = &local->hw.wiphy->iface_combinations[i]; 1046 1047 if (comb->radar_detect_widths && 1048 comb->num_different_channels > 1) 1049 return -EINVAL; 1050 } 1051 } 1052 1053 /* Only HW csum features are currently compatible with mac80211 */ 1054 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1055 return -EINVAL; 1056 1057 if (hw->max_report_rates == 0) 1058 hw->max_report_rates = hw->max_rates; 1059 1060 local->rx_chains = 1; 1061 1062 /* 1063 * generic code guarantees at least one band, 1064 * set this very early because much code assumes 1065 * that hw.conf.channel is assigned 1066 */ 1067 channels = 0; 1068 max_bitrates = 0; 1069 supp_ht = false; 1070 supp_vht = false; 1071 supp_he = false; 1072 supp_eht = false; 1073 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1074 const struct ieee80211_sband_iftype_data *iftd; 1075 struct ieee80211_supported_band *sband; 1076 1077 sband = local->hw.wiphy->bands[band]; 1078 if (!sband) 1079 continue; 1080 1081 if (!dflt_chandef.chan) { 1082 /* 1083 * Assign the first enabled channel to dflt_chandef 1084 * from the list of channels 1085 */ 1086 for (i = 0; i < sband->n_channels; i++) 1087 if (!(sband->channels[i].flags & 1088 IEEE80211_CHAN_DISABLED)) 1089 break; 1090 /* if none found then use the first anyway */ 1091 if (i == sband->n_channels) 1092 i = 0; 1093 cfg80211_chandef_create(&dflt_chandef, 1094 &sband->channels[i], 1095 NL80211_CHAN_NO_HT); 1096 /* init channel we're on */ 1097 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1098 local->hw.conf.chandef = dflt_chandef; 1099 local->_oper_chandef = dflt_chandef; 1100 } 1101 local->monitor_chandef = dflt_chandef; 1102 } 1103 1104 channels += sband->n_channels; 1105 1106 /* 1107 * Due to the way the aggregation code handles this and it 1108 * being an HT capability, we can't really support delayed 1109 * BA in MLO (yet). 1110 */ 1111 if (WARN_ON(sband->ht_cap.ht_supported && 1112 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1113 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1114 return -EINVAL; 1115 1116 if (max_bitrates < sband->n_bitrates) 1117 max_bitrates = sband->n_bitrates; 1118 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1119 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1120 1121 for_each_sband_iftype_data(sband, i, iftd) { 1122 u8 he_40_mhz_cap; 1123 1124 supp_he = supp_he || iftd->he_cap.has_he; 1125 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1126 1127 if (sband->band == NL80211_BAND_2GHZ) 1128 he_40_mhz_cap = 1129 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 1130 else 1131 he_40_mhz_cap = 1132 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; 1133 1134 /* currently no support for HE client where HT has 40 MHz but not HT */ 1135 if (iftd->he_cap.has_he && 1136 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | 1137 BIT(NL80211_IFTYPE_P2P_CLIENT)) && 1138 sband->ht_cap.ht_supported && 1139 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 1140 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) 1141 return -EINVAL; 1142 } 1143 1144 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1145 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1146 (supp_ht || supp_vht || supp_he))) 1147 return -EINVAL; 1148 1149 /* EHT requires HE support */ 1150 if (WARN_ON(supp_eht && !supp_he)) 1151 return -EINVAL; 1152 1153 if (!sband->ht_cap.ht_supported) 1154 continue; 1155 1156 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1157 local->rx_chains = 1158 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1159 local->rx_chains); 1160 1161 /* no need to mask, SM_PS_DISABLED has all bits set */ 1162 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1163 IEEE80211_HT_CAP_SM_PS_SHIFT; 1164 } 1165 1166 /* if low-level driver supports AP, we also support VLAN. 1167 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1168 * based on their support to transmit SW encrypted packets. 1169 */ 1170 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1171 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1172 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1173 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1174 } 1175 1176 /* mac80211 always supports monitor */ 1177 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1178 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1179 1180 /* mac80211 doesn't support more than one IBSS interface right now */ 1181 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1182 const struct ieee80211_iface_combination *c; 1183 int j; 1184 1185 c = &hw->wiphy->iface_combinations[i]; 1186 1187 for (j = 0; j < c->n_limits; j++) 1188 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1189 c->limits[j].max > 1) 1190 return -EINVAL; 1191 } 1192 1193 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1194 sizeof(void *) * channels, GFP_KERNEL); 1195 if (!local->int_scan_req) 1196 return -ENOMEM; 1197 1198 eth_broadcast_addr(local->int_scan_req->bssid); 1199 1200 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1201 if (!local->hw.wiphy->bands[band]) 1202 continue; 1203 local->int_scan_req->rates[band] = (u32) -1; 1204 } 1205 1206 #ifndef CONFIG_MAC80211_MESH 1207 /* mesh depends on Kconfig, but drivers should set it if they want */ 1208 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1209 #endif 1210 1211 /* if the underlying driver supports mesh, mac80211 will (at least) 1212 * provide routing of mesh authentication frames to userspace */ 1213 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1214 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1215 1216 /* mac80211 supports control port protocol changing */ 1217 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1218 1219 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1220 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1221 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1222 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1223 if (hw->max_signal <= 0) { 1224 result = -EINVAL; 1225 goto fail_workqueue; 1226 } 1227 } 1228 1229 /* Mac80211 and therefore all drivers using SW crypto only 1230 * are able to handle PTK rekeys and Extended Key ID. 1231 */ 1232 if (!local->ops->set_key) { 1233 wiphy_ext_feature_set(local->hw.wiphy, 1234 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1235 wiphy_ext_feature_set(local->hw.wiphy, 1236 NL80211_EXT_FEATURE_EXT_KEY_ID); 1237 } 1238 1239 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1240 wiphy_ext_feature_set(local->hw.wiphy, 1241 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1242 1243 /* 1244 * Calculate scan IE length -- we need this to alloc 1245 * memory and to subtract from the driver limit. It 1246 * includes the DS Params, (extended) supported rates, and HT 1247 * information -- SSID is the driver's responsibility. 1248 */ 1249 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1250 3 /* DS Params */; 1251 if (supp_ht) 1252 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1253 1254 if (supp_vht) 1255 local->scan_ies_len += 1256 2 + sizeof(struct ieee80211_vht_cap); 1257 1258 /* 1259 * HE cap element is variable in size - set len to allow max size */ 1260 if (supp_he) { 1261 local->scan_ies_len += 1262 3 + sizeof(struct ieee80211_he_cap_elem) + 1263 sizeof(struct ieee80211_he_mcs_nss_supp) + 1264 IEEE80211_HE_PPE_THRES_MAX_LEN; 1265 1266 if (supp_eht) 1267 local->scan_ies_len += 1268 3 + sizeof(struct ieee80211_eht_cap_elem) + 1269 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1270 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1271 } 1272 1273 if (!local->ops->hw_scan) { 1274 /* For hw_scan, driver needs to set these up. */ 1275 local->hw.wiphy->max_scan_ssids = 4; 1276 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1277 } 1278 1279 /* 1280 * If the driver supports any scan IEs, then assume the 1281 * limit includes the IEs mac80211 will add, otherwise 1282 * leave it at zero and let the driver sort it out; we 1283 * still pass our IEs to the driver but userspace will 1284 * not be allowed to in that case. 1285 */ 1286 if (local->hw.wiphy->max_scan_ie_len) 1287 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1288 1289 result = ieee80211_init_cipher_suites(local); 1290 if (result < 0) 1291 goto fail_workqueue; 1292 1293 if (!local->ops->remain_on_channel) 1294 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1295 1296 /* mac80211 based drivers don't support internal TDLS setup */ 1297 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1298 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1299 1300 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1301 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1302 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1303 1304 /* mac80211 supports multi BSSID, if the driver supports it */ 1305 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1306 local->hw.wiphy->support_mbssid = true; 1307 if (ieee80211_hw_check(&local->hw, 1308 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1309 local->hw.wiphy->support_only_he_mbssid = true; 1310 else 1311 local->ext_capa[2] |= 1312 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1313 } 1314 1315 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1316 1317 /* 1318 * We use the number of queues for feature tests (QoS, HT) internally 1319 * so restrict them appropriately. 1320 */ 1321 if (hw->queues > IEEE80211_MAX_QUEUES) 1322 hw->queues = IEEE80211_MAX_QUEUES; 1323 1324 local->workqueue = 1325 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1326 if (!local->workqueue) { 1327 result = -ENOMEM; 1328 goto fail_workqueue; 1329 } 1330 1331 /* 1332 * The hardware needs headroom for sending the frame, 1333 * and we need some headroom for passing the frame to monitor 1334 * interfaces, but never both at the same time. 1335 */ 1336 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1337 IEEE80211_TX_STATUS_HEADROOM); 1338 1339 /* 1340 * if the driver doesn't specify a max listen interval we 1341 * use 5 which should be a safe default 1342 */ 1343 if (local->hw.max_listen_interval == 0) 1344 local->hw.max_listen_interval = 5; 1345 1346 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1347 1348 local->dynamic_ps_forced_timeout = -1; 1349 1350 if (!local->hw.max_nan_de_entries) 1351 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1352 1353 if (!local->hw.weight_multiplier) 1354 local->hw.weight_multiplier = 1; 1355 1356 ieee80211_wep_init(local); 1357 1358 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1359 1360 ieee80211_led_init(local); 1361 1362 result = ieee80211_txq_setup_flows(local); 1363 if (result) 1364 goto fail_flows; 1365 1366 rtnl_lock(); 1367 result = ieee80211_init_rate_ctrl_alg(local, 1368 hw->rate_control_algorithm); 1369 rtnl_unlock(); 1370 if (result < 0) { 1371 wiphy_debug(local->hw.wiphy, 1372 "Failed to initialize rate control algorithm\n"); 1373 goto fail_rate; 1374 } 1375 1376 if (local->rate_ctrl) { 1377 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1378 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1379 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1380 } 1381 1382 /* 1383 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1384 * or have it when we don't, copy the sband structure and set/clear it. 1385 * This is necessary because rate scaling algorithms could be switched 1386 * and have different support values. 1387 * Print a message so that in the common case the reallocation can be 1388 * avoided. 1389 */ 1390 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1391 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1392 struct ieee80211_supported_band *sband; 1393 bool local_cap, ie_cap; 1394 1395 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1396 1397 sband = local->hw.wiphy->bands[band]; 1398 if (!sband || !sband->vht_cap.vht_supported) 1399 continue; 1400 1401 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1402 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1403 1404 if (local_cap == ie_cap) 1405 continue; 1406 1407 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1408 if (!sband) { 1409 result = -ENOMEM; 1410 goto fail_rate; 1411 } 1412 1413 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1414 band); 1415 1416 sband->vht_cap.vht_mcs.tx_highest ^= 1417 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1418 1419 local->hw.wiphy->bands[band] = sband; 1420 local->sband_allocated |= BIT(band); 1421 } 1422 1423 result = wiphy_register(local->hw.wiphy); 1424 if (result < 0) 1425 goto fail_wiphy_register; 1426 1427 debugfs_hw_add(local); 1428 rate_control_add_debugfs(local); 1429 1430 ieee80211_check_wbrf_support(local); 1431 1432 rtnl_lock(); 1433 wiphy_lock(hw->wiphy); 1434 1435 /* add one default STA interface if supported */ 1436 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1437 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1438 struct vif_params params = {0}; 1439 1440 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1441 NL80211_IFTYPE_STATION, ¶ms); 1442 if (result) 1443 wiphy_warn(local->hw.wiphy, 1444 "Failed to add default virtual iface\n"); 1445 } 1446 1447 wiphy_unlock(hw->wiphy); 1448 rtnl_unlock(); 1449 1450 #ifdef CONFIG_INET 1451 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1452 result = register_inetaddr_notifier(&local->ifa_notifier); 1453 if (result) 1454 goto fail_ifa; 1455 #endif 1456 1457 #if IS_ENABLED(CONFIG_IPV6) 1458 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1459 result = register_inet6addr_notifier(&local->ifa6_notifier); 1460 if (result) 1461 goto fail_ifa6; 1462 #endif 1463 1464 return 0; 1465 1466 #if IS_ENABLED(CONFIG_IPV6) 1467 fail_ifa6: 1468 #ifdef CONFIG_INET 1469 unregister_inetaddr_notifier(&local->ifa_notifier); 1470 #endif 1471 #endif 1472 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1473 fail_ifa: 1474 #endif 1475 wiphy_unregister(local->hw.wiphy); 1476 fail_wiphy_register: 1477 rtnl_lock(); 1478 rate_control_deinitialize(local); 1479 ieee80211_remove_interfaces(local); 1480 rtnl_unlock(); 1481 fail_rate: 1482 ieee80211_txq_teardown_flows(local); 1483 fail_flows: 1484 ieee80211_led_exit(local); 1485 destroy_workqueue(local->workqueue); 1486 fail_workqueue: 1487 if (local->wiphy_ciphers_allocated) { 1488 kfree(local->hw.wiphy->cipher_suites); 1489 local->wiphy_ciphers_allocated = false; 1490 } 1491 kfree(local->int_scan_req); 1492 return result; 1493 } 1494 EXPORT_SYMBOL(ieee80211_register_hw); 1495 1496 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1497 { 1498 struct ieee80211_local *local = hw_to_local(hw); 1499 1500 tasklet_kill(&local->tx_pending_tasklet); 1501 tasklet_kill(&local->tasklet); 1502 1503 #ifdef CONFIG_INET 1504 unregister_inetaddr_notifier(&local->ifa_notifier); 1505 #endif 1506 #if IS_ENABLED(CONFIG_IPV6) 1507 unregister_inet6addr_notifier(&local->ifa6_notifier); 1508 #endif 1509 1510 rtnl_lock(); 1511 1512 /* 1513 * At this point, interface list manipulations are fine 1514 * because the driver cannot be handing us frames any 1515 * more and the tasklet is killed. 1516 */ 1517 ieee80211_remove_interfaces(local); 1518 1519 ieee80211_txq_teardown_flows(local); 1520 1521 wiphy_lock(local->hw.wiphy); 1522 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1523 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1524 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1525 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1526 wiphy_unlock(local->hw.wiphy); 1527 rtnl_unlock(); 1528 1529 cancel_work_sync(&local->restart_work); 1530 1531 ieee80211_clear_tx_pending(local); 1532 rate_control_deinitialize(local); 1533 1534 if (skb_queue_len(&local->skb_queue) || 1535 skb_queue_len(&local->skb_queue_unreliable)) 1536 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1537 skb_queue_purge(&local->skb_queue); 1538 skb_queue_purge(&local->skb_queue_unreliable); 1539 1540 wiphy_unregister(local->hw.wiphy); 1541 destroy_workqueue(local->workqueue); 1542 ieee80211_led_exit(local); 1543 kfree(local->int_scan_req); 1544 } 1545 EXPORT_SYMBOL(ieee80211_unregister_hw); 1546 1547 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1548 { 1549 WARN_ONCE(1, "Have pending ack frames!\n"); 1550 kfree_skb(p); 1551 return 0; 1552 } 1553 1554 void ieee80211_free_hw(struct ieee80211_hw *hw) 1555 { 1556 struct ieee80211_local *local = hw_to_local(hw); 1557 enum nl80211_band band; 1558 1559 mutex_destroy(&local->iflist_mtx); 1560 1561 if (local->wiphy_ciphers_allocated) { 1562 kfree(local->hw.wiphy->cipher_suites); 1563 local->wiphy_ciphers_allocated = false; 1564 } 1565 1566 idr_for_each(&local->ack_status_frames, 1567 ieee80211_free_ack_frame, NULL); 1568 idr_destroy(&local->ack_status_frames); 1569 1570 sta_info_stop(local); 1571 1572 ieee80211_free_led_names(local); 1573 1574 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1575 if (!(local->sband_allocated & BIT(band))) 1576 continue; 1577 kfree(local->hw.wiphy->bands[band]); 1578 } 1579 1580 wiphy_free(local->hw.wiphy); 1581 } 1582 EXPORT_SYMBOL(ieee80211_free_hw); 1583 1584 static const char * const drop_reasons_monitor[] = { 1585 #define V(x) #x, 1586 [0] = "RX_DROP_MONITOR", 1587 MAC80211_DROP_REASONS_MONITOR(V) 1588 }; 1589 1590 static struct drop_reason_list drop_reason_list_monitor = { 1591 .reasons = drop_reasons_monitor, 1592 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1593 }; 1594 1595 static const char * const drop_reasons_unusable[] = { 1596 [0] = "RX_DROP_UNUSABLE", 1597 MAC80211_DROP_REASONS_UNUSABLE(V) 1598 #undef V 1599 }; 1600 1601 static struct drop_reason_list drop_reason_list_unusable = { 1602 .reasons = drop_reasons_unusable, 1603 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1604 }; 1605 1606 static int __init ieee80211_init(void) 1607 { 1608 struct sk_buff *skb; 1609 int ret; 1610 1611 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1612 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1613 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1614 1615 ret = rc80211_minstrel_init(); 1616 if (ret) 1617 return ret; 1618 1619 ret = ieee80211_iface_init(); 1620 if (ret) 1621 goto err_netdev; 1622 1623 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1624 &drop_reason_list_monitor); 1625 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1626 &drop_reason_list_unusable); 1627 1628 return 0; 1629 err_netdev: 1630 rc80211_minstrel_exit(); 1631 1632 return ret; 1633 } 1634 1635 static void __exit ieee80211_exit(void) 1636 { 1637 rc80211_minstrel_exit(); 1638 1639 ieee80211s_stop(); 1640 1641 ieee80211_iface_exit(); 1642 1643 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1644 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1645 1646 rcu_barrier(); 1647 } 1648 1649 1650 subsys_initcall(ieee80211_init); 1651 module_exit(ieee80211_exit); 1652 1653 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1654 MODULE_LICENSE("GPL"); 1655