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_PS |\ 206 BSS_CHANGED_IBSS |\ 207 BSS_CHANGED_ARP_FILTER |\ 208 BSS_CHANGED_SSID) 209 210 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 211 u64 changed) 212 { 213 struct ieee80211_local *local = sdata->local; 214 215 might_sleep(); 216 217 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 218 return; 219 220 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 221 BSS_CHANGED_BEACON_ENABLED) && 222 sdata->vif.type != NL80211_IFTYPE_AP && 223 sdata->vif.type != NL80211_IFTYPE_ADHOC && 224 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 225 sdata->vif.type != NL80211_IFTYPE_OCB)) 226 return; 227 228 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 229 sdata->vif.type == NL80211_IFTYPE_NAN || 230 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 231 !sdata->vif.bss_conf.mu_mimo_owner && 232 !(changed & BSS_CHANGED_TXPOWER)))) 233 return; 234 235 if (!check_sdata_in_driver(sdata)) 236 return; 237 238 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 239 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 240 241 trace_drv_vif_cfg_changed(local, sdata, changed); 242 if (local->ops->vif_cfg_changed) 243 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 244 } 245 246 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 247 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 248 249 /* FIXME: should be for each link */ 250 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 251 changed); 252 if (local->ops->link_info_changed) 253 local->ops->link_info_changed(&local->hw, &sdata->vif, 254 &sdata->vif.bss_conf, ch); 255 } 256 257 if (local->ops->bss_info_changed) 258 local->ops->bss_info_changed(&local->hw, &sdata->vif, 259 &sdata->vif.bss_conf, changed); 260 trace_drv_return_void(local); 261 } 262 263 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 264 u64 changed) 265 { 266 struct ieee80211_local *local = sdata->local; 267 268 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 269 270 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 271 return; 272 273 drv_vif_cfg_changed(local, sdata, changed); 274 } 275 276 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 277 struct ieee80211_link_data *link, 278 u64 changed) 279 { 280 struct ieee80211_local *local = sdata->local; 281 282 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 283 284 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 285 return; 286 287 if (!check_sdata_in_driver(sdata)) 288 return; 289 290 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 291 } 292 293 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 294 { 295 sdata->vif.bss_conf.use_cts_prot = false; 296 sdata->vif.bss_conf.use_short_preamble = false; 297 sdata->vif.bss_conf.use_short_slot = false; 298 return BSS_CHANGED_ERP_CTS_PROT | 299 BSS_CHANGED_ERP_PREAMBLE | 300 BSS_CHANGED_ERP_SLOT; 301 } 302 303 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 304 { 305 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 306 struct sk_buff *skb; 307 308 while ((skb = skb_dequeue(&local->skb_queue)) || 309 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 310 switch (skb->pkt_type) { 311 case IEEE80211_RX_MSG: 312 /* Clear skb->pkt_type in order to not confuse kernel 313 * netstack. */ 314 skb->pkt_type = 0; 315 ieee80211_rx(&local->hw, skb); 316 break; 317 case IEEE80211_TX_STATUS_MSG: 318 skb->pkt_type = 0; 319 ieee80211_tx_status(&local->hw, skb); 320 break; 321 default: 322 WARN(1, "mac80211: Packet is of unknown type %d\n", 323 skb->pkt_type); 324 dev_kfree_skb(skb); 325 break; 326 } 327 } 328 } 329 330 static void ieee80211_restart_work(struct work_struct *work) 331 { 332 struct ieee80211_local *local = 333 container_of(work, struct ieee80211_local, restart_work); 334 struct ieee80211_sub_if_data *sdata; 335 int ret; 336 337 /* wait for scan work complete */ 338 flush_workqueue(local->workqueue); 339 flush_work(&local->sched_scan_stopped_work); 340 flush_work(&local->radar_detected_work); 341 342 rtnl_lock(); 343 /* we might do interface manipulations, so need both */ 344 wiphy_lock(local->hw.wiphy); 345 346 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 347 "%s called with hardware scan in progress\n", __func__); 348 349 list_for_each_entry(sdata, &local->interfaces, list) { 350 /* 351 * XXX: there may be more work for other vif types and even 352 * for station mode: a good thing would be to run most of 353 * the iface type's dependent _stop (ieee80211_mg_stop, 354 * ieee80211_ibss_stop) etc... 355 * For now, fix only the specific bug that was seen: race 356 * between csa_connection_drop_work and us. 357 */ 358 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 359 /* 360 * This worker is scheduled from the iface worker that 361 * runs on mac80211's workqueue, so we can't be 362 * scheduling this worker after the cancel right here. 363 * The exception is ieee80211_chswitch_done. 364 * Then we can have a race... 365 */ 366 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 367 if (sdata->vif.bss_conf.csa_active) { 368 sdata_lock(sdata); 369 ieee80211_sta_connection_lost(sdata, 370 WLAN_REASON_UNSPECIFIED, 371 false); 372 sdata_unlock(sdata); 373 } 374 } 375 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 376 } 377 ieee80211_scan_cancel(local); 378 379 /* make sure any new ROC will consider local->in_reconfig */ 380 flush_delayed_work(&local->roc_work); 381 flush_work(&local->hw_roc_done); 382 383 /* wait for all packet processing to be done */ 384 synchronize_net(); 385 386 ret = ieee80211_reconfig(local); 387 wiphy_unlock(local->hw.wiphy); 388 389 if (ret) 390 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 391 392 rtnl_unlock(); 393 } 394 395 void ieee80211_restart_hw(struct ieee80211_hw *hw) 396 { 397 struct ieee80211_local *local = hw_to_local(hw); 398 399 trace_api_restart_hw(local); 400 401 wiphy_info(hw->wiphy, 402 "Hardware restart was requested\n"); 403 404 /* use this reason, ieee80211_reconfig will unblock it */ 405 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 406 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 407 false); 408 409 /* 410 * Stop all Rx during the reconfig. We don't want state changes 411 * or driver callbacks while this is in progress. 412 */ 413 local->in_reconfig = true; 414 barrier(); 415 416 queue_work(system_freezable_wq, &local->restart_work); 417 } 418 EXPORT_SYMBOL(ieee80211_restart_hw); 419 420 #ifdef CONFIG_INET 421 static int ieee80211_ifa_changed(struct notifier_block *nb, 422 unsigned long data, void *arg) 423 { 424 struct in_ifaddr *ifa = arg; 425 struct ieee80211_local *local = 426 container_of(nb, struct ieee80211_local, 427 ifa_notifier); 428 struct net_device *ndev = ifa->ifa_dev->dev; 429 struct wireless_dev *wdev = ndev->ieee80211_ptr; 430 struct in_device *idev; 431 struct ieee80211_sub_if_data *sdata; 432 struct ieee80211_vif_cfg *vif_cfg; 433 struct ieee80211_if_managed *ifmgd; 434 int c = 0; 435 436 /* Make sure it's our interface that got changed */ 437 if (!wdev) 438 return NOTIFY_DONE; 439 440 if (wdev->wiphy != local->hw.wiphy) 441 return NOTIFY_DONE; 442 443 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 444 vif_cfg = &sdata->vif.cfg; 445 446 /* ARP filtering is only supported in managed mode */ 447 if (sdata->vif.type != NL80211_IFTYPE_STATION) 448 return NOTIFY_DONE; 449 450 idev = __in_dev_get_rtnl(sdata->dev); 451 if (!idev) 452 return NOTIFY_DONE; 453 454 ifmgd = &sdata->u.mgd; 455 sdata_lock(sdata); 456 457 /* Copy the addresses to the vif config list */ 458 ifa = rtnl_dereference(idev->ifa_list); 459 while (ifa) { 460 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 461 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 462 ifa = rtnl_dereference(ifa->ifa_next); 463 c++; 464 } 465 466 vif_cfg->arp_addr_cnt = c; 467 468 /* Configure driver only if associated (which also implies it is up) */ 469 if (ifmgd->associated) 470 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 471 472 sdata_unlock(sdata); 473 474 return NOTIFY_OK; 475 } 476 #endif 477 478 #if IS_ENABLED(CONFIG_IPV6) 479 static int ieee80211_ifa6_changed(struct notifier_block *nb, 480 unsigned long data, void *arg) 481 { 482 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 483 struct inet6_dev *idev = ifa->idev; 484 struct net_device *ndev = ifa->idev->dev; 485 struct ieee80211_local *local = 486 container_of(nb, struct ieee80211_local, ifa6_notifier); 487 struct wireless_dev *wdev = ndev->ieee80211_ptr; 488 struct ieee80211_sub_if_data *sdata; 489 490 /* Make sure it's our interface that got changed */ 491 if (!wdev || wdev->wiphy != local->hw.wiphy) 492 return NOTIFY_DONE; 493 494 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 495 496 /* 497 * For now only support station mode. This is mostly because 498 * doing AP would have to handle AP_VLAN in some way ... 499 */ 500 if (sdata->vif.type != NL80211_IFTYPE_STATION) 501 return NOTIFY_DONE; 502 503 drv_ipv6_addr_change(local, sdata, idev); 504 505 return NOTIFY_OK; 506 } 507 #endif 508 509 /* There isn't a lot of sense in it, but you can transmit anything you like */ 510 static const struct ieee80211_txrx_stypes 511 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 512 [NL80211_IFTYPE_ADHOC] = { 513 .tx = 0xffff, 514 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 515 BIT(IEEE80211_STYPE_AUTH >> 4) | 516 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 517 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 518 }, 519 [NL80211_IFTYPE_STATION] = { 520 .tx = 0xffff, 521 /* 522 * To support Pre Association Security Negotiation (PASN) while 523 * already associated to one AP, allow user space to register to 524 * Rx authentication frames, so that the user space logic would 525 * be able to receive/handle authentication frames from a 526 * different AP as part of PASN. 527 * It is expected that user space would intelligently register 528 * for Rx authentication frames, i.e., only when PASN is used 529 * and configure a match filter only for PASN authentication 530 * algorithm, as otherwise the MLME functionality of mac80211 531 * would be broken. 532 */ 533 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 534 BIT(IEEE80211_STYPE_AUTH >> 4) | 535 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 536 }, 537 [NL80211_IFTYPE_AP] = { 538 .tx = 0xffff, 539 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 540 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 541 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 542 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 543 BIT(IEEE80211_STYPE_AUTH >> 4) | 544 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 545 BIT(IEEE80211_STYPE_ACTION >> 4), 546 }, 547 [NL80211_IFTYPE_AP_VLAN] = { 548 /* copy AP */ 549 .tx = 0xffff, 550 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 551 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 552 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 553 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 554 BIT(IEEE80211_STYPE_AUTH >> 4) | 555 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 556 BIT(IEEE80211_STYPE_ACTION >> 4), 557 }, 558 [NL80211_IFTYPE_P2P_CLIENT] = { 559 .tx = 0xffff, 560 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 561 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 562 }, 563 [NL80211_IFTYPE_P2P_GO] = { 564 .tx = 0xffff, 565 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 566 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 567 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 568 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 569 BIT(IEEE80211_STYPE_AUTH >> 4) | 570 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 571 BIT(IEEE80211_STYPE_ACTION >> 4), 572 }, 573 [NL80211_IFTYPE_MESH_POINT] = { 574 .tx = 0xffff, 575 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 576 BIT(IEEE80211_STYPE_AUTH >> 4) | 577 BIT(IEEE80211_STYPE_DEAUTH >> 4), 578 }, 579 [NL80211_IFTYPE_P2P_DEVICE] = { 580 .tx = 0xffff, 581 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 582 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 583 }, 584 }; 585 586 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 587 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 588 IEEE80211_HT_AMPDU_PARM_DENSITY, 589 590 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 591 IEEE80211_HT_CAP_MAX_AMSDU | 592 IEEE80211_HT_CAP_SGI_20 | 593 IEEE80211_HT_CAP_SGI_40 | 594 IEEE80211_HT_CAP_TX_STBC | 595 IEEE80211_HT_CAP_RX_STBC | 596 IEEE80211_HT_CAP_LDPC_CODING | 597 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 598 .mcs = { 599 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 600 0xff, 0xff, 0xff, 0xff, 0xff, }, 601 }, 602 }; 603 604 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 605 .vht_cap_info = 606 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 607 IEEE80211_VHT_CAP_SHORT_GI_80 | 608 IEEE80211_VHT_CAP_SHORT_GI_160 | 609 IEEE80211_VHT_CAP_RXSTBC_MASK | 610 IEEE80211_VHT_CAP_TXSTBC | 611 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 612 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 613 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 614 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 615 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 616 .supp_mcs = { 617 .rx_mcs_map = cpu_to_le16(~0), 618 .tx_mcs_map = cpu_to_le16(~0), 619 }, 620 }; 621 622 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 623 const struct ieee80211_ops *ops, 624 const char *requested_name) 625 { 626 struct ieee80211_local *local; 627 int priv_size, i; 628 struct wiphy *wiphy; 629 bool use_chanctx; 630 631 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 632 !ops->add_interface || !ops->remove_interface || 633 !ops->configure_filter)) 634 return NULL; 635 636 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 637 return NULL; 638 639 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 640 (ops->link_info_changed && ops->bss_info_changed))) 641 return NULL; 642 643 /* check all or no channel context operations exist */ 644 i = !!ops->add_chanctx + !!ops->remove_chanctx + 645 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 646 !!ops->unassign_vif_chanctx; 647 if (WARN_ON(i != 0 && i != 5)) 648 return NULL; 649 use_chanctx = i == 5; 650 651 /* Ensure 32-byte alignment of our private data and hw private data. 652 * We use the wiphy priv data for both our ieee80211_local and for 653 * the driver's private data 654 * 655 * In memory it'll be like this: 656 * 657 * +-------------------------+ 658 * | struct wiphy | 659 * +-------------------------+ 660 * | struct ieee80211_local | 661 * +-------------------------+ 662 * | driver's private data | 663 * +-------------------------+ 664 * 665 */ 666 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 667 668 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 669 670 if (!wiphy) 671 return NULL; 672 673 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 674 675 wiphy->privid = mac80211_wiphy_privid; 676 677 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 678 WIPHY_FLAG_4ADDR_AP | 679 WIPHY_FLAG_4ADDR_STATION | 680 WIPHY_FLAG_REPORTS_OBSS | 681 WIPHY_FLAG_OFFCHAN_TX; 682 683 if (!use_chanctx || ops->remain_on_channel) 684 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 685 686 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 687 NL80211_FEATURE_SAE | 688 NL80211_FEATURE_HT_IBSS | 689 NL80211_FEATURE_VIF_TXPOWER | 690 NL80211_FEATURE_MAC_ON_CREATE | 691 NL80211_FEATURE_USERSPACE_MPM | 692 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 693 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 694 wiphy_ext_feature_set(wiphy, 695 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 696 wiphy_ext_feature_set(wiphy, 697 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 698 wiphy_ext_feature_set(wiphy, 699 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 700 wiphy_ext_feature_set(wiphy, 701 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 702 703 if (!ops->hw_scan) { 704 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 705 NL80211_FEATURE_AP_SCAN; 706 /* 707 * if the driver behaves correctly using the probe request 708 * (template) from mac80211, then both of these should be 709 * supported even with hw scan - but let drivers opt in. 710 */ 711 wiphy_ext_feature_set(wiphy, 712 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 713 wiphy_ext_feature_set(wiphy, 714 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 715 } 716 717 if (!ops->set_key) 718 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 719 720 if (ops->wake_tx_queue) 721 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 722 723 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 724 725 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 726 727 local = wiphy_priv(wiphy); 728 729 if (sta_info_init(local)) 730 goto err_free; 731 732 local->hw.wiphy = wiphy; 733 734 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 735 736 local->ops = ops; 737 local->use_chanctx = use_chanctx; 738 739 /* 740 * We need a bit of data queued to build aggregates properly, so 741 * instruct the TCP stack to allow more than a single ms of data 742 * to be queued in the stack. The value is a bit-shift of 1 743 * second, so 7 is ~8ms of queued data. Only affects local TCP 744 * sockets. 745 * This is the default, anyhow - drivers may need to override it 746 * for local reasons (longer buffers, longer completion time, or 747 * similar). 748 */ 749 local->hw.tx_sk_pacing_shift = 7; 750 751 /* set up some defaults */ 752 local->hw.queues = 1; 753 local->hw.max_rates = 1; 754 local->hw.max_report_rates = 0; 755 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 756 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 757 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 758 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 759 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 760 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 761 IEEE80211_RADIOTAP_MCS_HAVE_GI | 762 IEEE80211_RADIOTAP_MCS_HAVE_BW; 763 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 764 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 765 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 766 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 767 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 768 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 769 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 770 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 771 772 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 773 774 wiphy->extended_capabilities = local->ext_capa; 775 wiphy->extended_capabilities_mask = local->ext_capa; 776 wiphy->extended_capabilities_len = 777 ARRAY_SIZE(local->ext_capa); 778 779 INIT_LIST_HEAD(&local->interfaces); 780 INIT_LIST_HEAD(&local->mon_list); 781 782 __hw_addr_init(&local->mc_list); 783 784 mutex_init(&local->iflist_mtx); 785 mutex_init(&local->mtx); 786 787 mutex_init(&local->key_mtx); 788 spin_lock_init(&local->filter_lock); 789 spin_lock_init(&local->rx_path_lock); 790 spin_lock_init(&local->queue_stop_reason_lock); 791 792 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 793 INIT_LIST_HEAD(&local->active_txqs[i]); 794 spin_lock_init(&local->active_txq_lock[i]); 795 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 796 local->aql_txq_limit_high[i] = 797 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 798 atomic_set(&local->aql_ac_pending_airtime[i], 0); 799 } 800 801 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 802 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 803 atomic_set(&local->aql_total_pending_airtime, 0); 804 805 INIT_LIST_HEAD(&local->chanctx_list); 806 mutex_init(&local->chanctx_mtx); 807 808 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 809 810 INIT_WORK(&local->restart_work, ieee80211_restart_work); 811 812 INIT_WORK(&local->radar_detected_work, 813 ieee80211_dfs_radar_detected_work); 814 815 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 816 local->smps_mode = IEEE80211_SMPS_OFF; 817 818 INIT_WORK(&local->dynamic_ps_enable_work, 819 ieee80211_dynamic_ps_enable_work); 820 INIT_WORK(&local->dynamic_ps_disable_work, 821 ieee80211_dynamic_ps_disable_work); 822 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 823 824 INIT_WORK(&local->sched_scan_stopped_work, 825 ieee80211_sched_scan_stopped_work); 826 827 spin_lock_init(&local->ack_status_lock); 828 idr_init(&local->ack_status_frames); 829 830 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 831 skb_queue_head_init(&local->pending[i]); 832 atomic_set(&local->agg_queue_stop[i], 0); 833 } 834 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 835 836 if (ops->wake_tx_queue) 837 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 838 839 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 840 841 skb_queue_head_init(&local->skb_queue); 842 skb_queue_head_init(&local->skb_queue_unreliable); 843 844 ieee80211_alloc_led_names(local); 845 846 ieee80211_roc_setup(local); 847 848 local->hw.radiotap_timestamp.units_pos = -1; 849 local->hw.radiotap_timestamp.accuracy = -1; 850 851 return &local->hw; 852 err_free: 853 wiphy_free(wiphy); 854 return NULL; 855 } 856 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 857 858 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 859 { 860 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 861 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 862 int r = 0, w = 0; 863 u32 *suites; 864 static const u32 cipher_suites[] = { 865 /* keep WEP first, it may be removed below */ 866 WLAN_CIPHER_SUITE_WEP40, 867 WLAN_CIPHER_SUITE_WEP104, 868 WLAN_CIPHER_SUITE_TKIP, 869 WLAN_CIPHER_SUITE_CCMP, 870 WLAN_CIPHER_SUITE_CCMP_256, 871 WLAN_CIPHER_SUITE_GCMP, 872 WLAN_CIPHER_SUITE_GCMP_256, 873 874 /* keep last -- depends on hw flags! */ 875 WLAN_CIPHER_SUITE_AES_CMAC, 876 WLAN_CIPHER_SUITE_BIP_CMAC_256, 877 WLAN_CIPHER_SUITE_BIP_GMAC_128, 878 WLAN_CIPHER_SUITE_BIP_GMAC_256, 879 }; 880 881 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 882 local->hw.wiphy->cipher_suites) { 883 /* If the driver advertises, or doesn't support SW crypto, 884 * we only need to remove WEP if necessary. 885 */ 886 if (have_wep) 887 return 0; 888 889 /* well if it has _no_ ciphers ... fine */ 890 if (!local->hw.wiphy->n_cipher_suites) 891 return 0; 892 893 /* Driver provides cipher suites, but we need to exclude WEP */ 894 suites = kmemdup(local->hw.wiphy->cipher_suites, 895 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 896 GFP_KERNEL); 897 if (!suites) 898 return -ENOMEM; 899 900 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 901 u32 suite = local->hw.wiphy->cipher_suites[r]; 902 903 if (suite == WLAN_CIPHER_SUITE_WEP40 || 904 suite == WLAN_CIPHER_SUITE_WEP104) 905 continue; 906 suites[w++] = suite; 907 } 908 } else { 909 /* assign the (software supported and perhaps offloaded) 910 * cipher suites 911 */ 912 local->hw.wiphy->cipher_suites = cipher_suites; 913 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 914 915 if (!have_mfp) 916 local->hw.wiphy->n_cipher_suites -= 4; 917 918 if (!have_wep) { 919 local->hw.wiphy->cipher_suites += 2; 920 local->hw.wiphy->n_cipher_suites -= 2; 921 } 922 923 /* not dynamically allocated, so just return */ 924 return 0; 925 } 926 927 local->hw.wiphy->cipher_suites = suites; 928 local->hw.wiphy->n_cipher_suites = w; 929 local->wiphy_ciphers_allocated = true; 930 931 return 0; 932 } 933 934 int ieee80211_register_hw(struct ieee80211_hw *hw) 935 { 936 struct ieee80211_local *local = hw_to_local(hw); 937 int result, i; 938 enum nl80211_band band; 939 int channels, max_bitrates; 940 bool supp_ht, supp_vht, supp_he, supp_eht; 941 struct cfg80211_chan_def dflt_chandef = {}; 942 943 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 944 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 945 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 946 return -EINVAL; 947 948 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 949 (!local->ops->tdls_channel_switch || 950 !local->ops->tdls_cancel_channel_switch || 951 !local->ops->tdls_recv_channel_switch)) 952 return -EOPNOTSUPP; 953 954 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 955 !local->ops->set_frag_threshold)) 956 return -EINVAL; 957 958 if (WARN_ON(local->hw.wiphy->interface_modes & 959 BIT(NL80211_IFTYPE_NAN) && 960 (!local->ops->start_nan || !local->ops->stop_nan))) 961 return -EINVAL; 962 963 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 964 /* 965 * For drivers capable of doing MLO, assume modern driver 966 * or firmware facilities, so software doesn't have to do 967 * as much, e.g. monitoring beacons would be hard if we 968 * might not even know which link is active at which time. 969 */ 970 if (WARN_ON(!local->use_chanctx)) 971 return -EINVAL; 972 973 if (WARN_ON(!local->ops->link_info_changed)) 974 return -EINVAL; 975 976 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 977 return -EINVAL; 978 979 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 980 return -EINVAL; 981 982 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 983 return -EINVAL; 984 985 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 986 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 987 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 988 return -EINVAL; 989 990 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 991 return -EINVAL; 992 993 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 994 return -EINVAL; 995 996 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 997 return -EINVAL; 998 999 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1000 return -EINVAL; 1001 1002 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1003 return -EINVAL; 1004 1005 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1006 return -EINVAL; 1007 } 1008 1009 #ifdef CONFIG_PM 1010 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1011 return -EINVAL; 1012 #endif 1013 1014 if (!local->use_chanctx) { 1015 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1016 const struct ieee80211_iface_combination *comb; 1017 1018 comb = &local->hw.wiphy->iface_combinations[i]; 1019 1020 if (comb->num_different_channels > 1) 1021 return -EINVAL; 1022 } 1023 } else { 1024 /* DFS is not supported with multi-channel combinations yet */ 1025 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1026 const struct ieee80211_iface_combination *comb; 1027 1028 comb = &local->hw.wiphy->iface_combinations[i]; 1029 1030 if (comb->radar_detect_widths && 1031 comb->num_different_channels > 1) 1032 return -EINVAL; 1033 } 1034 } 1035 1036 /* Only HW csum features are currently compatible with mac80211 */ 1037 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1038 return -EINVAL; 1039 1040 if (hw->max_report_rates == 0) 1041 hw->max_report_rates = hw->max_rates; 1042 1043 local->rx_chains = 1; 1044 1045 /* 1046 * generic code guarantees at least one band, 1047 * set this very early because much code assumes 1048 * that hw.conf.channel is assigned 1049 */ 1050 channels = 0; 1051 max_bitrates = 0; 1052 supp_ht = false; 1053 supp_vht = false; 1054 supp_he = false; 1055 supp_eht = false; 1056 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1057 struct ieee80211_supported_band *sband; 1058 1059 sband = local->hw.wiphy->bands[band]; 1060 if (!sband) 1061 continue; 1062 1063 if (!dflt_chandef.chan) { 1064 /* 1065 * Assign the first enabled channel to dflt_chandef 1066 * from the list of channels 1067 */ 1068 for (i = 0; i < sband->n_channels; i++) 1069 if (!(sband->channels[i].flags & 1070 IEEE80211_CHAN_DISABLED)) 1071 break; 1072 /* if none found then use the first anyway */ 1073 if (i == sband->n_channels) 1074 i = 0; 1075 cfg80211_chandef_create(&dflt_chandef, 1076 &sband->channels[i], 1077 NL80211_CHAN_NO_HT); 1078 /* init channel we're on */ 1079 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1080 local->hw.conf.chandef = dflt_chandef; 1081 local->_oper_chandef = dflt_chandef; 1082 } 1083 local->monitor_chandef = dflt_chandef; 1084 } 1085 1086 channels += sband->n_channels; 1087 1088 if (max_bitrates < sband->n_bitrates) 1089 max_bitrates = sband->n_bitrates; 1090 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1091 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1092 1093 for (i = 0; i < sband->n_iftype_data; i++) { 1094 const struct ieee80211_sband_iftype_data *iftd; 1095 1096 iftd = &sband->iftype_data[i]; 1097 1098 supp_he = supp_he || iftd->he_cap.has_he; 1099 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1100 } 1101 1102 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1103 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1104 (supp_ht || supp_vht || supp_he))) 1105 return -EINVAL; 1106 1107 /* EHT requires HE support */ 1108 if (WARN_ON(supp_eht && !supp_he)) 1109 return -EINVAL; 1110 1111 if (!sband->ht_cap.ht_supported) 1112 continue; 1113 1114 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1115 local->rx_chains = 1116 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1117 local->rx_chains); 1118 1119 /* no need to mask, SM_PS_DISABLED has all bits set */ 1120 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1121 IEEE80211_HT_CAP_SM_PS_SHIFT; 1122 } 1123 1124 /* if low-level driver supports AP, we also support VLAN. 1125 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1126 * based on their support to transmit SW encrypted packets. 1127 */ 1128 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1129 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1130 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1131 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1132 } 1133 1134 /* mac80211 always supports monitor */ 1135 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1136 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1137 1138 /* mac80211 doesn't support more than one IBSS interface right now */ 1139 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1140 const struct ieee80211_iface_combination *c; 1141 int j; 1142 1143 c = &hw->wiphy->iface_combinations[i]; 1144 1145 for (j = 0; j < c->n_limits; j++) 1146 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1147 c->limits[j].max > 1) 1148 return -EINVAL; 1149 } 1150 1151 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1152 sizeof(void *) * channels, GFP_KERNEL); 1153 if (!local->int_scan_req) 1154 return -ENOMEM; 1155 1156 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1157 if (!local->hw.wiphy->bands[band]) 1158 continue; 1159 local->int_scan_req->rates[band] = (u32) -1; 1160 } 1161 1162 #ifndef CONFIG_MAC80211_MESH 1163 /* mesh depends on Kconfig, but drivers should set it if they want */ 1164 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1165 #endif 1166 1167 /* if the underlying driver supports mesh, mac80211 will (at least) 1168 * provide routing of mesh authentication frames to userspace */ 1169 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1170 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1171 1172 /* mac80211 supports control port protocol changing */ 1173 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1174 1175 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1176 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1177 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1178 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1179 if (hw->max_signal <= 0) { 1180 result = -EINVAL; 1181 goto fail_workqueue; 1182 } 1183 } 1184 1185 /* Mac80211 and therefore all drivers using SW crypto only 1186 * are able to handle PTK rekeys and Extended Key ID. 1187 */ 1188 if (!local->ops->set_key) { 1189 wiphy_ext_feature_set(local->hw.wiphy, 1190 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1191 wiphy_ext_feature_set(local->hw.wiphy, 1192 NL80211_EXT_FEATURE_EXT_KEY_ID); 1193 } 1194 1195 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1196 wiphy_ext_feature_set(local->hw.wiphy, 1197 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1198 1199 /* 1200 * Calculate scan IE length -- we need this to alloc 1201 * memory and to subtract from the driver limit. It 1202 * includes the DS Params, (extended) supported rates, and HT 1203 * information -- SSID is the driver's responsibility. 1204 */ 1205 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1206 3 /* DS Params */; 1207 if (supp_ht) 1208 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1209 1210 if (supp_vht) 1211 local->scan_ies_len += 1212 2 + sizeof(struct ieee80211_vht_cap); 1213 1214 /* 1215 * HE cap element is variable in size - set len to allow max size */ 1216 if (supp_he) { 1217 local->scan_ies_len += 1218 3 + sizeof(struct ieee80211_he_cap_elem) + 1219 sizeof(struct ieee80211_he_mcs_nss_supp) + 1220 IEEE80211_HE_PPE_THRES_MAX_LEN; 1221 1222 if (supp_eht) 1223 local->scan_ies_len += 1224 3 + sizeof(struct ieee80211_eht_cap_elem) + 1225 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1226 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1227 } 1228 1229 if (!local->ops->hw_scan) { 1230 /* For hw_scan, driver needs to set these up. */ 1231 local->hw.wiphy->max_scan_ssids = 4; 1232 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1233 } 1234 1235 /* 1236 * If the driver supports any scan IEs, then assume the 1237 * limit includes the IEs mac80211 will add, otherwise 1238 * leave it at zero and let the driver sort it out; we 1239 * still pass our IEs to the driver but userspace will 1240 * not be allowed to in that case. 1241 */ 1242 if (local->hw.wiphy->max_scan_ie_len) 1243 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1244 1245 result = ieee80211_init_cipher_suites(local); 1246 if (result < 0) 1247 goto fail_workqueue; 1248 1249 if (!local->ops->remain_on_channel) 1250 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1251 1252 /* mac80211 based drivers don't support internal TDLS setup */ 1253 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1254 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1255 1256 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1257 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1258 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1259 1260 /* mac80211 supports multi BSSID, if the driver supports it */ 1261 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1262 local->hw.wiphy->support_mbssid = true; 1263 if (ieee80211_hw_check(&local->hw, 1264 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1265 local->hw.wiphy->support_only_he_mbssid = true; 1266 else 1267 local->ext_capa[2] |= 1268 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1269 } 1270 1271 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1272 1273 /* 1274 * We use the number of queues for feature tests (QoS, HT) internally 1275 * so restrict them appropriately. 1276 */ 1277 if (hw->queues > IEEE80211_MAX_QUEUES) 1278 hw->queues = IEEE80211_MAX_QUEUES; 1279 1280 local->workqueue = 1281 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1282 if (!local->workqueue) { 1283 result = -ENOMEM; 1284 goto fail_workqueue; 1285 } 1286 1287 /* 1288 * The hardware needs headroom for sending the frame, 1289 * and we need some headroom for passing the frame to monitor 1290 * interfaces, but never both at the same time. 1291 */ 1292 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1293 IEEE80211_TX_STATUS_HEADROOM); 1294 1295 /* 1296 * if the driver doesn't specify a max listen interval we 1297 * use 5 which should be a safe default 1298 */ 1299 if (local->hw.max_listen_interval == 0) 1300 local->hw.max_listen_interval = 5; 1301 1302 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1303 1304 local->dynamic_ps_forced_timeout = -1; 1305 1306 if (!local->hw.max_nan_de_entries) 1307 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1308 1309 if (!local->hw.weight_multiplier) 1310 local->hw.weight_multiplier = 1; 1311 1312 ieee80211_wep_init(local); 1313 1314 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1315 1316 ieee80211_led_init(local); 1317 1318 result = ieee80211_txq_setup_flows(local); 1319 if (result) 1320 goto fail_flows; 1321 1322 rtnl_lock(); 1323 result = ieee80211_init_rate_ctrl_alg(local, 1324 hw->rate_control_algorithm); 1325 rtnl_unlock(); 1326 if (result < 0) { 1327 wiphy_debug(local->hw.wiphy, 1328 "Failed to initialize rate control algorithm\n"); 1329 goto fail_rate; 1330 } 1331 1332 if (local->rate_ctrl) { 1333 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1334 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1335 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1336 } 1337 1338 /* 1339 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1340 * or have it when we don't, copy the sband structure and set/clear it. 1341 * This is necessary because rate scaling algorithms could be switched 1342 * and have different support values. 1343 * Print a message so that in the common case the reallocation can be 1344 * avoided. 1345 */ 1346 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1347 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1348 struct ieee80211_supported_band *sband; 1349 bool local_cap, ie_cap; 1350 1351 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1352 1353 sband = local->hw.wiphy->bands[band]; 1354 if (!sband || !sband->vht_cap.vht_supported) 1355 continue; 1356 1357 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1358 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1359 1360 if (local_cap == ie_cap) 1361 continue; 1362 1363 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1364 if (!sband) { 1365 result = -ENOMEM; 1366 goto fail_rate; 1367 } 1368 1369 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1370 band); 1371 1372 sband->vht_cap.vht_mcs.tx_highest ^= 1373 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1374 1375 local->hw.wiphy->bands[band] = sband; 1376 local->sband_allocated |= BIT(band); 1377 } 1378 1379 result = wiphy_register(local->hw.wiphy); 1380 if (result < 0) 1381 goto fail_wiphy_register; 1382 1383 debugfs_hw_add(local); 1384 rate_control_add_debugfs(local); 1385 1386 rtnl_lock(); 1387 wiphy_lock(hw->wiphy); 1388 1389 /* add one default STA interface if supported */ 1390 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1391 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1392 struct vif_params params = {0}; 1393 1394 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1395 NL80211_IFTYPE_STATION, ¶ms); 1396 if (result) 1397 wiphy_warn(local->hw.wiphy, 1398 "Failed to add default virtual iface\n"); 1399 } 1400 1401 wiphy_unlock(hw->wiphy); 1402 rtnl_unlock(); 1403 1404 #ifdef CONFIG_INET 1405 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1406 result = register_inetaddr_notifier(&local->ifa_notifier); 1407 if (result) 1408 goto fail_ifa; 1409 #endif 1410 1411 #if IS_ENABLED(CONFIG_IPV6) 1412 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1413 result = register_inet6addr_notifier(&local->ifa6_notifier); 1414 if (result) 1415 goto fail_ifa6; 1416 #endif 1417 1418 return 0; 1419 1420 #if IS_ENABLED(CONFIG_IPV6) 1421 fail_ifa6: 1422 #ifdef CONFIG_INET 1423 unregister_inetaddr_notifier(&local->ifa_notifier); 1424 #endif 1425 #endif 1426 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1427 fail_ifa: 1428 #endif 1429 wiphy_unregister(local->hw.wiphy); 1430 fail_wiphy_register: 1431 rtnl_lock(); 1432 rate_control_deinitialize(local); 1433 ieee80211_remove_interfaces(local); 1434 rtnl_unlock(); 1435 fail_rate: 1436 fail_flows: 1437 ieee80211_led_exit(local); 1438 destroy_workqueue(local->workqueue); 1439 fail_workqueue: 1440 if (local->wiphy_ciphers_allocated) 1441 kfree(local->hw.wiphy->cipher_suites); 1442 kfree(local->int_scan_req); 1443 return result; 1444 } 1445 EXPORT_SYMBOL(ieee80211_register_hw); 1446 1447 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1448 { 1449 struct ieee80211_local *local = hw_to_local(hw); 1450 1451 tasklet_kill(&local->tx_pending_tasklet); 1452 tasklet_kill(&local->tasklet); 1453 1454 #ifdef CONFIG_INET 1455 unregister_inetaddr_notifier(&local->ifa_notifier); 1456 #endif 1457 #if IS_ENABLED(CONFIG_IPV6) 1458 unregister_inet6addr_notifier(&local->ifa6_notifier); 1459 #endif 1460 1461 rtnl_lock(); 1462 1463 /* 1464 * At this point, interface list manipulations are fine 1465 * because the driver cannot be handing us frames any 1466 * more and the tasklet is killed. 1467 */ 1468 ieee80211_remove_interfaces(local); 1469 1470 rtnl_unlock(); 1471 1472 cancel_delayed_work_sync(&local->roc_work); 1473 cancel_work_sync(&local->restart_work); 1474 cancel_work_sync(&local->reconfig_filter); 1475 flush_work(&local->sched_scan_stopped_work); 1476 flush_work(&local->radar_detected_work); 1477 1478 ieee80211_clear_tx_pending(local); 1479 rate_control_deinitialize(local); 1480 1481 if (skb_queue_len(&local->skb_queue) || 1482 skb_queue_len(&local->skb_queue_unreliable)) 1483 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1484 skb_queue_purge(&local->skb_queue); 1485 skb_queue_purge(&local->skb_queue_unreliable); 1486 1487 wiphy_unregister(local->hw.wiphy); 1488 destroy_workqueue(local->workqueue); 1489 ieee80211_led_exit(local); 1490 kfree(local->int_scan_req); 1491 } 1492 EXPORT_SYMBOL(ieee80211_unregister_hw); 1493 1494 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1495 { 1496 WARN_ONCE(1, "Have pending ack frames!\n"); 1497 kfree_skb(p); 1498 return 0; 1499 } 1500 1501 void ieee80211_free_hw(struct ieee80211_hw *hw) 1502 { 1503 struct ieee80211_local *local = hw_to_local(hw); 1504 enum nl80211_band band; 1505 1506 mutex_destroy(&local->iflist_mtx); 1507 mutex_destroy(&local->mtx); 1508 1509 if (local->wiphy_ciphers_allocated) 1510 kfree(local->hw.wiphy->cipher_suites); 1511 1512 idr_for_each(&local->ack_status_frames, 1513 ieee80211_free_ack_frame, NULL); 1514 idr_destroy(&local->ack_status_frames); 1515 1516 sta_info_stop(local); 1517 1518 ieee80211_free_led_names(local); 1519 1520 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1521 if (!(local->sband_allocated & BIT(band))) 1522 continue; 1523 kfree(local->hw.wiphy->bands[band]); 1524 } 1525 1526 wiphy_free(local->hw.wiphy); 1527 } 1528 EXPORT_SYMBOL(ieee80211_free_hw); 1529 1530 static int __init ieee80211_init(void) 1531 { 1532 struct sk_buff *skb; 1533 int ret; 1534 1535 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1536 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1537 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1538 1539 ret = rc80211_minstrel_init(); 1540 if (ret) 1541 return ret; 1542 1543 ret = ieee80211_iface_init(); 1544 if (ret) 1545 goto err_netdev; 1546 1547 return 0; 1548 err_netdev: 1549 rc80211_minstrel_exit(); 1550 1551 return ret; 1552 } 1553 1554 static void __exit ieee80211_exit(void) 1555 { 1556 rc80211_minstrel_exit(); 1557 1558 ieee80211s_stop(); 1559 1560 ieee80211_iface_exit(); 1561 1562 rcu_barrier(); 1563 } 1564 1565 1566 subsys_initcall(ieee80211_init); 1567 module_exit(ieee80211_exit); 1568 1569 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1570 MODULE_LICENSE("GPL"); 1571