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) 2018-2022 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/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 if (local->rx_mcast_action_reg) 68 new_flags |= FIF_MCAST_ACTION; 69 70 spin_lock_bh(&local->filter_lock); 71 changed_flags = local->filter_flags ^ new_flags; 72 73 mc = drv_prepare_multicast(local, &local->mc_list); 74 spin_unlock_bh(&local->filter_lock); 75 76 /* be a bit nasty */ 77 new_flags |= (1<<31); 78 79 drv_configure_filter(local, changed_flags, &new_flags, mc); 80 81 WARN_ON(new_flags & (1<<31)); 82 83 local->filter_flags = new_flags & ~(1<<31); 84 } 85 86 static void ieee80211_reconfig_filter(struct work_struct *work) 87 { 88 struct ieee80211_local *local = 89 container_of(work, struct ieee80211_local, reconfig_filter); 90 91 ieee80211_configure_filter(local); 92 } 93 94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 95 { 96 struct ieee80211_sub_if_data *sdata; 97 struct cfg80211_chan_def chandef = {}; 98 u32 changed = 0; 99 int power; 100 u32 offchannel_flag; 101 102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 103 104 if (local->scan_chandef.chan) { 105 chandef = local->scan_chandef; 106 } else if (local->tmp_channel) { 107 chandef.chan = local->tmp_channel; 108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 109 chandef.center_freq1 = chandef.chan->center_freq; 110 chandef.freq1_offset = chandef.chan->freq_offset; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 116 chandef.chan->center_freq, chandef.chan->freq_offset, 117 chandef.width, chandef.center_freq1, chandef.freq1_offset, 118 chandef.center_freq2); 119 120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 122 else 123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 124 125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 126 127 if (offchannel_flag || 128 !cfg80211_chandef_identical(&local->hw.conf.chandef, 129 &local->_oper_chandef)) { 130 local->hw.conf.chandef = chandef; 131 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 132 } 133 134 if (!conf_is_ht(&local->hw.conf)) { 135 /* 136 * mac80211.h documents that this is only valid 137 * when the channel is set to an HT type, and 138 * that otherwise STATIC is used. 139 */ 140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 141 } else if (local->hw.conf.smps_mode != local->smps_mode) { 142 local->hw.conf.smps_mode = local->smps_mode; 143 changed |= IEEE80211_CONF_CHANGE_SMPS; 144 } 145 146 power = ieee80211_chandef_max_power(&chandef); 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 150 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 151 continue; 152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 153 continue; 154 if (sdata->vif.bss_conf.txpower == INT_MIN) 155 continue; 156 power = min(power, sdata->vif.bss_conf.txpower); 157 } 158 rcu_read_unlock(); 159 160 if (local->hw.conf.power_level != power) { 161 changed |= IEEE80211_CONF_CHANGE_POWER; 162 local->hw.conf.power_level = power; 163 } 164 165 return changed; 166 } 167 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 169 { 170 int ret = 0; 171 172 might_sleep(); 173 174 if (!local->use_chanctx) 175 changed |= ieee80211_hw_conf_chan(local); 176 else 177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 178 IEEE80211_CONF_CHANGE_POWER | 179 IEEE80211_CONF_CHANGE_SMPS); 180 181 if (changed && local->open_count) { 182 ret = drv_config(local, changed); 183 /* 184 * Goal: 185 * HW reconfiguration should never fail, the driver has told 186 * us what it can support so it should live up to that promise. 187 * 188 * Current status: 189 * rfkill is not integrated with mac80211 and a 190 * configuration command can thus fail if hardware rfkill 191 * is enabled 192 * 193 * FIXME: integrate rfkill with mac80211 and then add this 194 * WARN_ON() back 195 * 196 */ 197 /* WARN_ON(ret); */ 198 } 199 200 return ret; 201 } 202 203 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 204 BSS_CHANGED_IDLE |\ 205 BSS_CHANGED_IBSS |\ 206 BSS_CHANGED_ARP_FILTER |\ 207 BSS_CHANGED_SSID) 208 209 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 210 u64 changed) 211 { 212 struct ieee80211_local *local = sdata->local; 213 214 might_sleep(); 215 216 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 217 return; 218 219 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 220 BSS_CHANGED_BEACON_ENABLED) && 221 sdata->vif.type != NL80211_IFTYPE_AP && 222 sdata->vif.type != NL80211_IFTYPE_ADHOC && 223 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 224 sdata->vif.type != NL80211_IFTYPE_OCB)) 225 return; 226 227 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 228 sdata->vif.type == NL80211_IFTYPE_NAN || 229 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 230 !sdata->vif.bss_conf.mu_mimo_owner && 231 !(changed & BSS_CHANGED_TXPOWER)))) 232 return; 233 234 if (!check_sdata_in_driver(sdata)) 235 return; 236 237 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 238 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 239 240 trace_drv_vif_cfg_changed(local, sdata, changed); 241 if (local->ops->vif_cfg_changed) 242 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 243 } 244 245 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 246 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 247 248 /* FIXME: should be for each link */ 249 trace_drv_link_info_changed(local, sdata, 0, changed); 250 if (local->ops->link_info_changed) 251 local->ops->link_info_changed(&local->hw, &sdata->vif, 252 0, ch); 253 } 254 255 if (local->ops->bss_info_changed) 256 local->ops->bss_info_changed(&local->hw, &sdata->vif, 257 &sdata->vif.bss_conf, changed); 258 trace_drv_return_void(local); 259 } 260 261 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 262 u64 changed) 263 { 264 struct ieee80211_local *local = sdata->local; 265 266 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 267 268 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 269 return; 270 271 drv_vif_cfg_changed(local, sdata, changed); 272 } 273 274 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 275 int link_id, u64 changed) 276 { 277 struct ieee80211_local *local = sdata->local; 278 279 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 280 281 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 282 return; 283 284 if (!check_sdata_in_driver(sdata)) 285 return; 286 287 drv_link_info_changed(local, sdata, link_id, changed); 288 } 289 290 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 291 { 292 sdata->vif.bss_conf.use_cts_prot = false; 293 sdata->vif.bss_conf.use_short_preamble = false; 294 sdata->vif.bss_conf.use_short_slot = false; 295 return BSS_CHANGED_ERP_CTS_PROT | 296 BSS_CHANGED_ERP_PREAMBLE | 297 BSS_CHANGED_ERP_SLOT; 298 } 299 300 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 301 { 302 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 303 struct sk_buff *skb; 304 305 while ((skb = skb_dequeue(&local->skb_queue)) || 306 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 307 switch (skb->pkt_type) { 308 case IEEE80211_RX_MSG: 309 /* Clear skb->pkt_type in order to not confuse kernel 310 * netstack. */ 311 skb->pkt_type = 0; 312 ieee80211_rx(&local->hw, skb); 313 break; 314 case IEEE80211_TX_STATUS_MSG: 315 skb->pkt_type = 0; 316 ieee80211_tx_status(&local->hw, skb); 317 break; 318 default: 319 WARN(1, "mac80211: Packet is of unknown type %d\n", 320 skb->pkt_type); 321 dev_kfree_skb(skb); 322 break; 323 } 324 } 325 } 326 327 static void ieee80211_restart_work(struct work_struct *work) 328 { 329 struct ieee80211_local *local = 330 container_of(work, struct ieee80211_local, restart_work); 331 struct ieee80211_sub_if_data *sdata; 332 int ret; 333 334 /* wait for scan work complete */ 335 flush_workqueue(local->workqueue); 336 flush_work(&local->sched_scan_stopped_work); 337 flush_work(&local->radar_detected_work); 338 339 rtnl_lock(); 340 /* we might do interface manipulations, so need both */ 341 wiphy_lock(local->hw.wiphy); 342 343 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 344 "%s called with hardware scan in progress\n", __func__); 345 346 list_for_each_entry(sdata, &local->interfaces, list) { 347 /* 348 * XXX: there may be more work for other vif types and even 349 * for station mode: a good thing would be to run most of 350 * the iface type's dependent _stop (ieee80211_mg_stop, 351 * ieee80211_ibss_stop) etc... 352 * For now, fix only the specific bug that was seen: race 353 * between csa_connection_drop_work and us. 354 */ 355 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 356 /* 357 * This worker is scheduled from the iface worker that 358 * runs on mac80211's workqueue, so we can't be 359 * scheduling this worker after the cancel right here. 360 * The exception is ieee80211_chswitch_done. 361 * Then we can have a race... 362 */ 363 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 364 if (sdata->vif.bss_conf.csa_active) { 365 sdata_lock(sdata); 366 ieee80211_sta_connection_lost(sdata, 367 WLAN_REASON_UNSPECIFIED, 368 false); 369 sdata_unlock(sdata); 370 } 371 } 372 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 373 } 374 ieee80211_scan_cancel(local); 375 376 /* make sure any new ROC will consider local->in_reconfig */ 377 flush_delayed_work(&local->roc_work); 378 flush_work(&local->hw_roc_done); 379 380 /* wait for all packet processing to be done */ 381 synchronize_net(); 382 383 ret = ieee80211_reconfig(local); 384 wiphy_unlock(local->hw.wiphy); 385 386 if (ret) 387 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 388 389 rtnl_unlock(); 390 } 391 392 void ieee80211_restart_hw(struct ieee80211_hw *hw) 393 { 394 struct ieee80211_local *local = hw_to_local(hw); 395 396 trace_api_restart_hw(local); 397 398 wiphy_info(hw->wiphy, 399 "Hardware restart was requested\n"); 400 401 /* use this reason, ieee80211_reconfig will unblock it */ 402 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 403 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 404 false); 405 406 /* 407 * Stop all Rx during the reconfig. We don't want state changes 408 * or driver callbacks while this is in progress. 409 */ 410 local->in_reconfig = true; 411 barrier(); 412 413 queue_work(system_freezable_wq, &local->restart_work); 414 } 415 EXPORT_SYMBOL(ieee80211_restart_hw); 416 417 #ifdef CONFIG_INET 418 static int ieee80211_ifa_changed(struct notifier_block *nb, 419 unsigned long data, void *arg) 420 { 421 struct in_ifaddr *ifa = arg; 422 struct ieee80211_local *local = 423 container_of(nb, struct ieee80211_local, 424 ifa_notifier); 425 struct net_device *ndev = ifa->ifa_dev->dev; 426 struct wireless_dev *wdev = ndev->ieee80211_ptr; 427 struct in_device *idev; 428 struct ieee80211_sub_if_data *sdata; 429 struct ieee80211_vif_cfg *vif_cfg; 430 struct ieee80211_if_managed *ifmgd; 431 int c = 0; 432 433 /* Make sure it's our interface that got changed */ 434 if (!wdev) 435 return NOTIFY_DONE; 436 437 if (wdev->wiphy != local->hw.wiphy) 438 return NOTIFY_DONE; 439 440 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 441 vif_cfg = &sdata->vif.cfg; 442 443 /* ARP filtering is only supported in managed mode */ 444 if (sdata->vif.type != NL80211_IFTYPE_STATION) 445 return NOTIFY_DONE; 446 447 idev = __in_dev_get_rtnl(sdata->dev); 448 if (!idev) 449 return NOTIFY_DONE; 450 451 ifmgd = &sdata->u.mgd; 452 sdata_lock(sdata); 453 454 /* Copy the addresses to the vif config list */ 455 ifa = rtnl_dereference(idev->ifa_list); 456 while (ifa) { 457 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 458 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 459 ifa = rtnl_dereference(ifa->ifa_next); 460 c++; 461 } 462 463 vif_cfg->arp_addr_cnt = c; 464 465 /* Configure driver only if associated (which also implies it is up) */ 466 if (ifmgd->associated) 467 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 468 469 sdata_unlock(sdata); 470 471 return NOTIFY_OK; 472 } 473 #endif 474 475 #if IS_ENABLED(CONFIG_IPV6) 476 static int ieee80211_ifa6_changed(struct notifier_block *nb, 477 unsigned long data, void *arg) 478 { 479 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 480 struct inet6_dev *idev = ifa->idev; 481 struct net_device *ndev = ifa->idev->dev; 482 struct ieee80211_local *local = 483 container_of(nb, struct ieee80211_local, ifa6_notifier); 484 struct wireless_dev *wdev = ndev->ieee80211_ptr; 485 struct ieee80211_sub_if_data *sdata; 486 487 /* Make sure it's our interface that got changed */ 488 if (!wdev || wdev->wiphy != local->hw.wiphy) 489 return NOTIFY_DONE; 490 491 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 492 493 /* 494 * For now only support station mode. This is mostly because 495 * doing AP would have to handle AP_VLAN in some way ... 496 */ 497 if (sdata->vif.type != NL80211_IFTYPE_STATION) 498 return NOTIFY_DONE; 499 500 drv_ipv6_addr_change(local, sdata, idev); 501 502 return NOTIFY_OK; 503 } 504 #endif 505 506 /* There isn't a lot of sense in it, but you can transmit anything you like */ 507 static const struct ieee80211_txrx_stypes 508 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 509 [NL80211_IFTYPE_ADHOC] = { 510 .tx = 0xffff, 511 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 512 BIT(IEEE80211_STYPE_AUTH >> 4) | 513 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 514 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 515 }, 516 [NL80211_IFTYPE_STATION] = { 517 .tx = 0xffff, 518 /* 519 * To support Pre Association Security Negotiation (PASN) while 520 * already associated to one AP, allow user space to register to 521 * Rx authentication frames, so that the user space logic would 522 * be able to receive/handle authentication frames from a 523 * different AP as part of PASN. 524 * It is expected that user space would intelligently register 525 * for Rx authentication frames, i.e., only when PASN is used 526 * and configure a match filter only for PASN authentication 527 * algorithm, as otherwise the MLME functionality of mac80211 528 * would be broken. 529 */ 530 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 531 BIT(IEEE80211_STYPE_AUTH >> 4) | 532 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 533 }, 534 [NL80211_IFTYPE_AP] = { 535 .tx = 0xffff, 536 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 537 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 538 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 539 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 540 BIT(IEEE80211_STYPE_AUTH >> 4) | 541 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 542 BIT(IEEE80211_STYPE_ACTION >> 4), 543 }, 544 [NL80211_IFTYPE_AP_VLAN] = { 545 /* copy AP */ 546 .tx = 0xffff, 547 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 548 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 549 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 550 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 551 BIT(IEEE80211_STYPE_AUTH >> 4) | 552 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 553 BIT(IEEE80211_STYPE_ACTION >> 4), 554 }, 555 [NL80211_IFTYPE_P2P_CLIENT] = { 556 .tx = 0xffff, 557 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 558 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 559 }, 560 [NL80211_IFTYPE_P2P_GO] = { 561 .tx = 0xffff, 562 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 563 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 564 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 565 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 566 BIT(IEEE80211_STYPE_AUTH >> 4) | 567 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 568 BIT(IEEE80211_STYPE_ACTION >> 4), 569 }, 570 [NL80211_IFTYPE_MESH_POINT] = { 571 .tx = 0xffff, 572 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 573 BIT(IEEE80211_STYPE_AUTH >> 4) | 574 BIT(IEEE80211_STYPE_DEAUTH >> 4), 575 }, 576 [NL80211_IFTYPE_P2P_DEVICE] = { 577 .tx = 0xffff, 578 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 579 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 580 }, 581 }; 582 583 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 584 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 585 IEEE80211_HT_AMPDU_PARM_DENSITY, 586 587 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 588 IEEE80211_HT_CAP_MAX_AMSDU | 589 IEEE80211_HT_CAP_SGI_20 | 590 IEEE80211_HT_CAP_SGI_40 | 591 IEEE80211_HT_CAP_TX_STBC | 592 IEEE80211_HT_CAP_RX_STBC | 593 IEEE80211_HT_CAP_LDPC_CODING | 594 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 595 .mcs = { 596 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 597 0xff, 0xff, 0xff, 0xff, 0xff, }, 598 }, 599 }; 600 601 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 602 .vht_cap_info = 603 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 604 IEEE80211_VHT_CAP_SHORT_GI_80 | 605 IEEE80211_VHT_CAP_SHORT_GI_160 | 606 IEEE80211_VHT_CAP_RXSTBC_MASK | 607 IEEE80211_VHT_CAP_TXSTBC | 608 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 609 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 610 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 611 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 612 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 613 .supp_mcs = { 614 .rx_mcs_map = cpu_to_le16(~0), 615 .tx_mcs_map = cpu_to_le16(~0), 616 }, 617 }; 618 619 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 620 const struct ieee80211_ops *ops, 621 const char *requested_name) 622 { 623 struct ieee80211_local *local; 624 int priv_size, i; 625 struct wiphy *wiphy; 626 bool use_chanctx; 627 628 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 629 !ops->add_interface || !ops->remove_interface || 630 !ops->configure_filter)) 631 return NULL; 632 633 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 634 return NULL; 635 636 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 637 (ops->link_info_changed && ops->bss_info_changed))) 638 return NULL; 639 640 /* check all or no channel context operations exist */ 641 i = !!ops->add_chanctx + !!ops->remove_chanctx + 642 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 643 !!ops->unassign_vif_chanctx; 644 if (WARN_ON(i != 0 && i != 5)) 645 return NULL; 646 use_chanctx = i == 5; 647 648 /* Ensure 32-byte alignment of our private data and hw private data. 649 * We use the wiphy priv data for both our ieee80211_local and for 650 * the driver's private data 651 * 652 * In memory it'll be like this: 653 * 654 * +-------------------------+ 655 * | struct wiphy | 656 * +-------------------------+ 657 * | struct ieee80211_local | 658 * +-------------------------+ 659 * | driver's private data | 660 * +-------------------------+ 661 * 662 */ 663 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 664 665 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 666 667 if (!wiphy) 668 return NULL; 669 670 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 671 672 wiphy->privid = mac80211_wiphy_privid; 673 674 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 675 WIPHY_FLAG_4ADDR_AP | 676 WIPHY_FLAG_4ADDR_STATION | 677 WIPHY_FLAG_REPORTS_OBSS | 678 WIPHY_FLAG_OFFCHAN_TX; 679 680 if (!use_chanctx || ops->remain_on_channel) 681 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 682 683 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 684 NL80211_FEATURE_SAE | 685 NL80211_FEATURE_HT_IBSS | 686 NL80211_FEATURE_VIF_TXPOWER | 687 NL80211_FEATURE_MAC_ON_CREATE | 688 NL80211_FEATURE_USERSPACE_MPM | 689 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 690 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 691 wiphy_ext_feature_set(wiphy, 692 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 693 wiphy_ext_feature_set(wiphy, 694 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 695 wiphy_ext_feature_set(wiphy, 696 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 697 wiphy_ext_feature_set(wiphy, 698 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 699 700 if (!ops->hw_scan) { 701 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 702 NL80211_FEATURE_AP_SCAN; 703 /* 704 * if the driver behaves correctly using the probe request 705 * (template) from mac80211, then both of these should be 706 * supported even with hw scan - but let drivers opt in. 707 */ 708 wiphy_ext_feature_set(wiphy, 709 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 710 wiphy_ext_feature_set(wiphy, 711 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 712 } 713 714 if (!ops->set_key) 715 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 716 717 if (ops->wake_tx_queue) 718 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 719 720 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 721 722 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 723 724 local = wiphy_priv(wiphy); 725 726 if (sta_info_init(local)) 727 goto err_free; 728 729 local->hw.wiphy = wiphy; 730 731 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 732 733 local->ops = ops; 734 local->use_chanctx = use_chanctx; 735 736 /* 737 * We need a bit of data queued to build aggregates properly, so 738 * instruct the TCP stack to allow more than a single ms of data 739 * to be queued in the stack. The value is a bit-shift of 1 740 * second, so 7 is ~8ms of queued data. Only affects local TCP 741 * sockets. 742 * This is the default, anyhow - drivers may need to override it 743 * for local reasons (longer buffers, longer completion time, or 744 * similar). 745 */ 746 local->hw.tx_sk_pacing_shift = 7; 747 748 /* set up some defaults */ 749 local->hw.queues = 1; 750 local->hw.max_rates = 1; 751 local->hw.max_report_rates = 0; 752 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 753 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 754 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 755 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 756 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 757 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 758 IEEE80211_RADIOTAP_MCS_HAVE_GI | 759 IEEE80211_RADIOTAP_MCS_HAVE_BW; 760 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 761 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 762 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 763 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 764 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 765 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 766 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 767 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 768 769 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 770 771 wiphy->extended_capabilities = local->ext_capa; 772 wiphy->extended_capabilities_mask = local->ext_capa; 773 wiphy->extended_capabilities_len = 774 ARRAY_SIZE(local->ext_capa); 775 776 INIT_LIST_HEAD(&local->interfaces); 777 INIT_LIST_HEAD(&local->mon_list); 778 779 __hw_addr_init(&local->mc_list); 780 781 mutex_init(&local->iflist_mtx); 782 mutex_init(&local->mtx); 783 784 mutex_init(&local->key_mtx); 785 spin_lock_init(&local->filter_lock); 786 spin_lock_init(&local->rx_path_lock); 787 spin_lock_init(&local->queue_stop_reason_lock); 788 789 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 790 INIT_LIST_HEAD(&local->active_txqs[i]); 791 spin_lock_init(&local->active_txq_lock[i]); 792 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 793 local->aql_txq_limit_high[i] = 794 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 795 atomic_set(&local->aql_ac_pending_airtime[i], 0); 796 } 797 798 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 799 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 800 atomic_set(&local->aql_total_pending_airtime, 0); 801 802 INIT_LIST_HEAD(&local->chanctx_list); 803 mutex_init(&local->chanctx_mtx); 804 805 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 806 807 INIT_WORK(&local->restart_work, ieee80211_restart_work); 808 809 INIT_WORK(&local->radar_detected_work, 810 ieee80211_dfs_radar_detected_work); 811 812 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 813 local->smps_mode = IEEE80211_SMPS_OFF; 814 815 INIT_WORK(&local->dynamic_ps_enable_work, 816 ieee80211_dynamic_ps_enable_work); 817 INIT_WORK(&local->dynamic_ps_disable_work, 818 ieee80211_dynamic_ps_disable_work); 819 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 820 821 INIT_WORK(&local->sched_scan_stopped_work, 822 ieee80211_sched_scan_stopped_work); 823 824 spin_lock_init(&local->ack_status_lock); 825 idr_init(&local->ack_status_frames); 826 827 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 828 skb_queue_head_init(&local->pending[i]); 829 atomic_set(&local->agg_queue_stop[i], 0); 830 } 831 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 832 833 if (ops->wake_tx_queue) 834 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 835 836 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 837 838 skb_queue_head_init(&local->skb_queue); 839 skb_queue_head_init(&local->skb_queue_unreliable); 840 841 ieee80211_alloc_led_names(local); 842 843 ieee80211_roc_setup(local); 844 845 local->hw.radiotap_timestamp.units_pos = -1; 846 local->hw.radiotap_timestamp.accuracy = -1; 847 848 return &local->hw; 849 err_free: 850 wiphy_free(wiphy); 851 return NULL; 852 } 853 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 854 855 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 856 { 857 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 858 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 859 int r = 0, w = 0; 860 u32 *suites; 861 static const u32 cipher_suites[] = { 862 /* keep WEP first, it may be removed below */ 863 WLAN_CIPHER_SUITE_WEP40, 864 WLAN_CIPHER_SUITE_WEP104, 865 WLAN_CIPHER_SUITE_TKIP, 866 WLAN_CIPHER_SUITE_CCMP, 867 WLAN_CIPHER_SUITE_CCMP_256, 868 WLAN_CIPHER_SUITE_GCMP, 869 WLAN_CIPHER_SUITE_GCMP_256, 870 871 /* keep last -- depends on hw flags! */ 872 WLAN_CIPHER_SUITE_AES_CMAC, 873 WLAN_CIPHER_SUITE_BIP_CMAC_256, 874 WLAN_CIPHER_SUITE_BIP_GMAC_128, 875 WLAN_CIPHER_SUITE_BIP_GMAC_256, 876 }; 877 878 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 879 local->hw.wiphy->cipher_suites) { 880 /* If the driver advertises, or doesn't support SW crypto, 881 * we only need to remove WEP if necessary. 882 */ 883 if (have_wep) 884 return 0; 885 886 /* well if it has _no_ ciphers ... fine */ 887 if (!local->hw.wiphy->n_cipher_suites) 888 return 0; 889 890 /* Driver provides cipher suites, but we need to exclude WEP */ 891 suites = kmemdup(local->hw.wiphy->cipher_suites, 892 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 893 GFP_KERNEL); 894 if (!suites) 895 return -ENOMEM; 896 897 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 898 u32 suite = local->hw.wiphy->cipher_suites[r]; 899 900 if (suite == WLAN_CIPHER_SUITE_WEP40 || 901 suite == WLAN_CIPHER_SUITE_WEP104) 902 continue; 903 suites[w++] = suite; 904 } 905 } else { 906 /* assign the (software supported and perhaps offloaded) 907 * cipher suites 908 */ 909 local->hw.wiphy->cipher_suites = cipher_suites; 910 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 911 912 if (!have_mfp) 913 local->hw.wiphy->n_cipher_suites -= 4; 914 915 if (!have_wep) { 916 local->hw.wiphy->cipher_suites += 2; 917 local->hw.wiphy->n_cipher_suites -= 2; 918 } 919 920 /* not dynamically allocated, so just return */ 921 return 0; 922 } 923 924 local->hw.wiphy->cipher_suites = suites; 925 local->hw.wiphy->n_cipher_suites = w; 926 local->wiphy_ciphers_allocated = true; 927 928 return 0; 929 } 930 931 int ieee80211_register_hw(struct ieee80211_hw *hw) 932 { 933 struct ieee80211_local *local = hw_to_local(hw); 934 int result, i; 935 enum nl80211_band band; 936 int channels, max_bitrates; 937 bool supp_ht, supp_vht, supp_he, supp_eht; 938 struct cfg80211_chan_def dflt_chandef = {}; 939 940 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 941 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 942 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 943 return -EINVAL; 944 945 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 946 (!local->ops->tdls_channel_switch || 947 !local->ops->tdls_cancel_channel_switch || 948 !local->ops->tdls_recv_channel_switch)) 949 return -EOPNOTSUPP; 950 951 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 952 !local->ops->set_frag_threshold)) 953 return -EINVAL; 954 955 if (WARN_ON(local->hw.wiphy->interface_modes & 956 BIT(NL80211_IFTYPE_NAN) && 957 (!local->ops->start_nan || !local->ops->stop_nan))) 958 return -EINVAL; 959 960 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 961 /* 962 * For drivers capable of doing MLO, assume modern driver 963 * or firmware facilities, so software doesn't have to do 964 * as much, e.g. monitoring beacons would be hard if we 965 * might not even know which link is active at which time. 966 */ 967 if (WARN_ON(!local->use_chanctx)) 968 return -EINVAL; 969 970 if (WARN_ON(!local->ops->link_info_changed)) 971 return -EINVAL; 972 973 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 974 return -EINVAL; 975 976 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 977 return -EINVAL; 978 979 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 980 return -EINVAL; 981 982 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 983 !ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS))) 984 return -EINVAL; 985 986 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 987 return -EINVAL; 988 989 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 990 return -EINVAL; 991 992 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 993 return -EINVAL; 994 995 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 996 return -EINVAL; 997 998 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 999 return -EINVAL; 1000 } 1001 1002 #ifdef CONFIG_PM 1003 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1004 return -EINVAL; 1005 #endif 1006 1007 if (!local->use_chanctx) { 1008 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1009 const struct ieee80211_iface_combination *comb; 1010 1011 comb = &local->hw.wiphy->iface_combinations[i]; 1012 1013 if (comb->num_different_channels > 1) 1014 return -EINVAL; 1015 } 1016 } else { 1017 /* DFS is not supported with multi-channel combinations yet */ 1018 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1019 const struct ieee80211_iface_combination *comb; 1020 1021 comb = &local->hw.wiphy->iface_combinations[i]; 1022 1023 if (comb->radar_detect_widths && 1024 comb->num_different_channels > 1) 1025 return -EINVAL; 1026 } 1027 } 1028 1029 /* Only HW csum features are currently compatible with mac80211 */ 1030 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1031 return -EINVAL; 1032 1033 if (hw->max_report_rates == 0) 1034 hw->max_report_rates = hw->max_rates; 1035 1036 local->rx_chains = 1; 1037 1038 /* 1039 * generic code guarantees at least one band, 1040 * set this very early because much code assumes 1041 * that hw.conf.channel is assigned 1042 */ 1043 channels = 0; 1044 max_bitrates = 0; 1045 supp_ht = false; 1046 supp_vht = false; 1047 supp_he = false; 1048 supp_eht = false; 1049 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1050 struct ieee80211_supported_band *sband; 1051 1052 sband = local->hw.wiphy->bands[band]; 1053 if (!sband) 1054 continue; 1055 1056 if (!dflt_chandef.chan) { 1057 /* 1058 * Assign the first enabled channel to dflt_chandef 1059 * from the list of channels 1060 */ 1061 for (i = 0; i < sband->n_channels; i++) 1062 if (!(sband->channels[i].flags & 1063 IEEE80211_CHAN_DISABLED)) 1064 break; 1065 /* if none found then use the first anyway */ 1066 if (i == sband->n_channels) 1067 i = 0; 1068 cfg80211_chandef_create(&dflt_chandef, 1069 &sband->channels[i], 1070 NL80211_CHAN_NO_HT); 1071 /* init channel we're on */ 1072 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1073 local->hw.conf.chandef = dflt_chandef; 1074 local->_oper_chandef = dflt_chandef; 1075 } 1076 local->monitor_chandef = dflt_chandef; 1077 } 1078 1079 channels += sband->n_channels; 1080 1081 if (max_bitrates < sband->n_bitrates) 1082 max_bitrates = sband->n_bitrates; 1083 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1084 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1085 1086 for (i = 0; i < sband->n_iftype_data; i++) { 1087 const struct ieee80211_sband_iftype_data *iftd; 1088 1089 iftd = &sband->iftype_data[i]; 1090 1091 supp_he = supp_he || iftd->he_cap.has_he; 1092 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1093 } 1094 1095 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1096 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1097 (supp_ht || supp_vht || supp_he))) 1098 return -EINVAL; 1099 1100 /* EHT requires HE support */ 1101 if (WARN_ON(supp_eht && !supp_he)) 1102 return -EINVAL; 1103 1104 if (!sband->ht_cap.ht_supported) 1105 continue; 1106 1107 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1108 local->rx_chains = 1109 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1110 local->rx_chains); 1111 1112 /* no need to mask, SM_PS_DISABLED has all bits set */ 1113 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1114 IEEE80211_HT_CAP_SM_PS_SHIFT; 1115 } 1116 1117 /* if low-level driver supports AP, we also support VLAN. 1118 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1119 * based on their support to transmit SW encrypted packets. 1120 */ 1121 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1122 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1123 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1124 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1125 } 1126 1127 /* mac80211 always supports monitor */ 1128 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1129 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1130 1131 /* mac80211 doesn't support more than one IBSS interface right now */ 1132 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1133 const struct ieee80211_iface_combination *c; 1134 int j; 1135 1136 c = &hw->wiphy->iface_combinations[i]; 1137 1138 for (j = 0; j < c->n_limits; j++) 1139 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1140 c->limits[j].max > 1) 1141 return -EINVAL; 1142 } 1143 1144 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1145 sizeof(void *) * channels, GFP_KERNEL); 1146 if (!local->int_scan_req) 1147 return -ENOMEM; 1148 1149 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1150 if (!local->hw.wiphy->bands[band]) 1151 continue; 1152 local->int_scan_req->rates[band] = (u32) -1; 1153 } 1154 1155 #ifndef CONFIG_MAC80211_MESH 1156 /* mesh depends on Kconfig, but drivers should set it if they want */ 1157 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1158 #endif 1159 1160 /* if the underlying driver supports mesh, mac80211 will (at least) 1161 * provide routing of mesh authentication frames to userspace */ 1162 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1163 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1164 1165 /* mac80211 supports control port protocol changing */ 1166 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1167 1168 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1169 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1170 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1171 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1172 if (hw->max_signal <= 0) { 1173 result = -EINVAL; 1174 goto fail_workqueue; 1175 } 1176 } 1177 1178 /* Mac80211 and therefore all drivers using SW crypto only 1179 * are able to handle PTK rekeys and Extended Key ID. 1180 */ 1181 if (!local->ops->set_key) { 1182 wiphy_ext_feature_set(local->hw.wiphy, 1183 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1184 wiphy_ext_feature_set(local->hw.wiphy, 1185 NL80211_EXT_FEATURE_EXT_KEY_ID); 1186 } 1187 1188 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1189 wiphy_ext_feature_set(local->hw.wiphy, 1190 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1191 1192 /* 1193 * Calculate scan IE length -- we need this to alloc 1194 * memory and to subtract from the driver limit. It 1195 * includes the DS Params, (extended) supported rates, and HT 1196 * information -- SSID is the driver's responsibility. 1197 */ 1198 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1199 3 /* DS Params */; 1200 if (supp_ht) 1201 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1202 1203 if (supp_vht) 1204 local->scan_ies_len += 1205 2 + sizeof(struct ieee80211_vht_cap); 1206 1207 /* 1208 * HE cap element is variable in size - set len to allow max size */ 1209 if (supp_he) { 1210 local->scan_ies_len += 1211 3 + sizeof(struct ieee80211_he_cap_elem) + 1212 sizeof(struct ieee80211_he_mcs_nss_supp) + 1213 IEEE80211_HE_PPE_THRES_MAX_LEN; 1214 1215 if (supp_eht) 1216 local->scan_ies_len += 1217 3 + sizeof(struct ieee80211_eht_cap_elem) + 1218 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1219 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1220 } 1221 1222 if (!local->ops->hw_scan) { 1223 /* For hw_scan, driver needs to set these up. */ 1224 local->hw.wiphy->max_scan_ssids = 4; 1225 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1226 } 1227 1228 /* 1229 * If the driver supports any scan IEs, then assume the 1230 * limit includes the IEs mac80211 will add, otherwise 1231 * leave it at zero and let the driver sort it out; we 1232 * still pass our IEs to the driver but userspace will 1233 * not be allowed to in that case. 1234 */ 1235 if (local->hw.wiphy->max_scan_ie_len) 1236 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1237 1238 result = ieee80211_init_cipher_suites(local); 1239 if (result < 0) 1240 goto fail_workqueue; 1241 1242 if (!local->ops->remain_on_channel) 1243 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1244 1245 /* mac80211 based drivers don't support internal TDLS setup */ 1246 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1247 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1248 1249 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1250 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1251 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1252 1253 /* mac80211 supports multi BSSID, if the driver supports it */ 1254 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1255 local->hw.wiphy->support_mbssid = true; 1256 if (ieee80211_hw_check(&local->hw, 1257 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1258 local->hw.wiphy->support_only_he_mbssid = true; 1259 else 1260 local->ext_capa[2] |= 1261 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1262 } 1263 1264 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1265 1266 /* 1267 * We use the number of queues for feature tests (QoS, HT) internally 1268 * so restrict them appropriately. 1269 */ 1270 if (hw->queues > IEEE80211_MAX_QUEUES) 1271 hw->queues = IEEE80211_MAX_QUEUES; 1272 1273 local->workqueue = 1274 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1275 if (!local->workqueue) { 1276 result = -ENOMEM; 1277 goto fail_workqueue; 1278 } 1279 1280 /* 1281 * The hardware needs headroom for sending the frame, 1282 * and we need some headroom for passing the frame to monitor 1283 * interfaces, but never both at the same time. 1284 */ 1285 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1286 IEEE80211_TX_STATUS_HEADROOM); 1287 1288 /* 1289 * if the driver doesn't specify a max listen interval we 1290 * use 5 which should be a safe default 1291 */ 1292 if (local->hw.max_listen_interval == 0) 1293 local->hw.max_listen_interval = 5; 1294 1295 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1296 1297 local->dynamic_ps_forced_timeout = -1; 1298 1299 if (!local->hw.max_nan_de_entries) 1300 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1301 1302 if (!local->hw.weight_multiplier) 1303 local->hw.weight_multiplier = 1; 1304 1305 ieee80211_wep_init(local); 1306 1307 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1308 1309 ieee80211_led_init(local); 1310 1311 result = ieee80211_txq_setup_flows(local); 1312 if (result) 1313 goto fail_flows; 1314 1315 rtnl_lock(); 1316 result = ieee80211_init_rate_ctrl_alg(local, 1317 hw->rate_control_algorithm); 1318 rtnl_unlock(); 1319 if (result < 0) { 1320 wiphy_debug(local->hw.wiphy, 1321 "Failed to initialize rate control algorithm\n"); 1322 goto fail_rate; 1323 } 1324 1325 if (local->rate_ctrl) { 1326 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1327 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1328 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1329 } 1330 1331 /* 1332 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1333 * or have it when we don't, copy the sband structure and set/clear it. 1334 * This is necessary because rate scaling algorithms could be switched 1335 * and have different support values. 1336 * Print a message so that in the common case the reallocation can be 1337 * avoided. 1338 */ 1339 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1340 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1341 struct ieee80211_supported_band *sband; 1342 bool local_cap, ie_cap; 1343 1344 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1345 1346 sband = local->hw.wiphy->bands[band]; 1347 if (!sband || !sband->vht_cap.vht_supported) 1348 continue; 1349 1350 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1351 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1352 1353 if (local_cap == ie_cap) 1354 continue; 1355 1356 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1357 if (!sband) { 1358 result = -ENOMEM; 1359 goto fail_rate; 1360 } 1361 1362 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1363 band); 1364 1365 sband->vht_cap.vht_mcs.tx_highest ^= 1366 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1367 1368 local->hw.wiphy->bands[band] = sband; 1369 local->sband_allocated |= BIT(band); 1370 } 1371 1372 result = wiphy_register(local->hw.wiphy); 1373 if (result < 0) 1374 goto fail_wiphy_register; 1375 1376 debugfs_hw_add(local); 1377 rate_control_add_debugfs(local); 1378 1379 rtnl_lock(); 1380 wiphy_lock(hw->wiphy); 1381 1382 /* add one default STA interface if supported */ 1383 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1384 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1385 struct vif_params params = {0}; 1386 1387 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1388 NL80211_IFTYPE_STATION, ¶ms); 1389 if (result) 1390 wiphy_warn(local->hw.wiphy, 1391 "Failed to add default virtual iface\n"); 1392 } 1393 1394 wiphy_unlock(hw->wiphy); 1395 rtnl_unlock(); 1396 1397 #ifdef CONFIG_INET 1398 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1399 result = register_inetaddr_notifier(&local->ifa_notifier); 1400 if (result) 1401 goto fail_ifa; 1402 #endif 1403 1404 #if IS_ENABLED(CONFIG_IPV6) 1405 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1406 result = register_inet6addr_notifier(&local->ifa6_notifier); 1407 if (result) 1408 goto fail_ifa6; 1409 #endif 1410 1411 return 0; 1412 1413 #if IS_ENABLED(CONFIG_IPV6) 1414 fail_ifa6: 1415 #ifdef CONFIG_INET 1416 unregister_inetaddr_notifier(&local->ifa_notifier); 1417 #endif 1418 #endif 1419 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1420 fail_ifa: 1421 #endif 1422 wiphy_unregister(local->hw.wiphy); 1423 fail_wiphy_register: 1424 rtnl_lock(); 1425 rate_control_deinitialize(local); 1426 ieee80211_remove_interfaces(local); 1427 rtnl_unlock(); 1428 fail_rate: 1429 fail_flows: 1430 ieee80211_led_exit(local); 1431 destroy_workqueue(local->workqueue); 1432 fail_workqueue: 1433 if (local->wiphy_ciphers_allocated) 1434 kfree(local->hw.wiphy->cipher_suites); 1435 kfree(local->int_scan_req); 1436 return result; 1437 } 1438 EXPORT_SYMBOL(ieee80211_register_hw); 1439 1440 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1441 { 1442 struct ieee80211_local *local = hw_to_local(hw); 1443 1444 tasklet_kill(&local->tx_pending_tasklet); 1445 tasklet_kill(&local->tasklet); 1446 1447 #ifdef CONFIG_INET 1448 unregister_inetaddr_notifier(&local->ifa_notifier); 1449 #endif 1450 #if IS_ENABLED(CONFIG_IPV6) 1451 unregister_inet6addr_notifier(&local->ifa6_notifier); 1452 #endif 1453 1454 rtnl_lock(); 1455 1456 /* 1457 * At this point, interface list manipulations are fine 1458 * because the driver cannot be handing us frames any 1459 * more and the tasklet is killed. 1460 */ 1461 ieee80211_remove_interfaces(local); 1462 1463 rtnl_unlock(); 1464 1465 cancel_delayed_work_sync(&local->roc_work); 1466 cancel_work_sync(&local->restart_work); 1467 cancel_work_sync(&local->reconfig_filter); 1468 flush_work(&local->sched_scan_stopped_work); 1469 flush_work(&local->radar_detected_work); 1470 1471 ieee80211_clear_tx_pending(local); 1472 rate_control_deinitialize(local); 1473 1474 if (skb_queue_len(&local->skb_queue) || 1475 skb_queue_len(&local->skb_queue_unreliable)) 1476 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1477 skb_queue_purge(&local->skb_queue); 1478 skb_queue_purge(&local->skb_queue_unreliable); 1479 1480 wiphy_unregister(local->hw.wiphy); 1481 destroy_workqueue(local->workqueue); 1482 ieee80211_led_exit(local); 1483 kfree(local->int_scan_req); 1484 } 1485 EXPORT_SYMBOL(ieee80211_unregister_hw); 1486 1487 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1488 { 1489 WARN_ONCE(1, "Have pending ack frames!\n"); 1490 kfree_skb(p); 1491 return 0; 1492 } 1493 1494 void ieee80211_free_hw(struct ieee80211_hw *hw) 1495 { 1496 struct ieee80211_local *local = hw_to_local(hw); 1497 enum nl80211_band band; 1498 1499 mutex_destroy(&local->iflist_mtx); 1500 mutex_destroy(&local->mtx); 1501 1502 if (local->wiphy_ciphers_allocated) 1503 kfree(local->hw.wiphy->cipher_suites); 1504 1505 idr_for_each(&local->ack_status_frames, 1506 ieee80211_free_ack_frame, NULL); 1507 idr_destroy(&local->ack_status_frames); 1508 1509 sta_info_stop(local); 1510 1511 ieee80211_free_led_names(local); 1512 1513 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1514 if (!(local->sband_allocated & BIT(band))) 1515 continue; 1516 kfree(local->hw.wiphy->bands[band]); 1517 } 1518 1519 wiphy_free(local->hw.wiphy); 1520 } 1521 EXPORT_SYMBOL(ieee80211_free_hw); 1522 1523 static int __init ieee80211_init(void) 1524 { 1525 struct sk_buff *skb; 1526 int ret; 1527 1528 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1529 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1530 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1531 1532 ret = rc80211_minstrel_init(); 1533 if (ret) 1534 return ret; 1535 1536 ret = ieee80211_iface_init(); 1537 if (ret) 1538 goto err_netdev; 1539 1540 return 0; 1541 err_netdev: 1542 rc80211_minstrel_exit(); 1543 1544 return ret; 1545 } 1546 1547 static void __exit ieee80211_exit(void) 1548 { 1549 rc80211_minstrel_exit(); 1550 1551 ieee80211s_stop(); 1552 1553 ieee80211_iface_exit(); 1554 1555 rcu_barrier(); 1556 } 1557 1558 1559 subsys_initcall(ieee80211_init); 1560 module_exit(ieee80211_exit); 1561 1562 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1563 MODULE_LICENSE("GPL"); 1564