1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2023 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/dropreason.h> 26 #include <net/cfg80211.h> 27 #include <net/addrconf.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wep.h" 34 #include "led.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_allmultis)) 44 new_flags |= FIF_ALLMULTI; 45 46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 48 new_flags |= FIF_BCN_PRBRESP_PROMISC; 49 50 if (local->fif_probe_req || local->probe_req_reg) 51 new_flags |= FIF_PROBE_REQ; 52 53 if (local->fif_fcsfail) 54 new_flags |= FIF_FCSFAIL; 55 56 if (local->fif_plcpfail) 57 new_flags |= FIF_PLCPFAIL; 58 59 if (local->fif_control) 60 new_flags |= FIF_CONTROL; 61 62 if (local->fif_other_bss) 63 new_flags |= FIF_OTHER_BSS; 64 65 if (local->fif_pspoll) 66 new_flags |= FIF_PSPOLL; 67 68 if (local->rx_mcast_action_reg) 69 new_flags |= FIF_MCAST_ACTION; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96 { 97 struct ieee80211_sub_if_data *sdata; 98 struct cfg80211_chan_def chandef = {}; 99 u32 changed = 0; 100 int power; 101 u32 offchannel_flag; 102 103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 104 105 if (local->scan_chandef.chan) { 106 chandef = local->scan_chandef; 107 } else if (local->tmp_channel) { 108 chandef.chan = local->tmp_channel; 109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 110 chandef.center_freq1 = chandef.chan->center_freq; 111 chandef.freq1_offset = chandef.chan->freq_offset; 112 } else 113 chandef = local->_oper_chandef; 114 115 WARN(!cfg80211_chandef_valid(&chandef), 116 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 117 chandef.chan->center_freq, chandef.chan->freq_offset, 118 chandef.width, chandef.center_freq1, chandef.freq1_offset, 119 chandef.center_freq2); 120 121 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 122 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 123 else 124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 125 126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 127 128 if (offchannel_flag || 129 !cfg80211_chandef_identical(&local->hw.conf.chandef, 130 &local->_oper_chandef)) { 131 local->hw.conf.chandef = chandef; 132 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 133 } 134 135 if (!conf_is_ht(&local->hw.conf)) { 136 /* 137 * mac80211.h documents that this is only valid 138 * when the channel is set to an HT type, and 139 * that otherwise STATIC is used. 140 */ 141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 142 } else if (local->hw.conf.smps_mode != local->smps_mode) { 143 local->hw.conf.smps_mode = local->smps_mode; 144 changed |= IEEE80211_CONF_CHANGE_SMPS; 145 } 146 147 power = ieee80211_chandef_max_power(&chandef); 148 149 rcu_read_lock(); 150 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 151 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 152 continue; 153 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 154 continue; 155 if (sdata->vif.bss_conf.txpower == INT_MIN) 156 continue; 157 power = min(power, sdata->vif.bss_conf.txpower); 158 } 159 rcu_read_unlock(); 160 161 if (local->hw.conf.power_level != power) { 162 changed |= IEEE80211_CONF_CHANGE_POWER; 163 local->hw.conf.power_level = power; 164 } 165 166 return changed; 167 } 168 169 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 170 { 171 int ret = 0; 172 173 might_sleep(); 174 175 if (!local->use_chanctx) 176 changed |= ieee80211_hw_conf_chan(local); 177 else 178 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 179 IEEE80211_CONF_CHANGE_POWER | 180 IEEE80211_CONF_CHANGE_SMPS); 181 182 if (changed && local->open_count) { 183 ret = drv_config(local, changed); 184 /* 185 * Goal: 186 * HW reconfiguration should never fail, the driver has told 187 * us what it can support so it should live up to that promise. 188 * 189 * Current status: 190 * rfkill is not integrated with mac80211 and a 191 * configuration command can thus fail if hardware rfkill 192 * is enabled 193 * 194 * FIXME: integrate rfkill with mac80211 and then add this 195 * WARN_ON() back 196 * 197 */ 198 /* WARN_ON(ret); */ 199 } 200 201 return ret; 202 } 203 204 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 205 BSS_CHANGED_IDLE |\ 206 BSS_CHANGED_PS |\ 207 BSS_CHANGED_IBSS |\ 208 BSS_CHANGED_ARP_FILTER |\ 209 BSS_CHANGED_SSID) 210 211 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 212 u64 changed) 213 { 214 struct ieee80211_local *local = sdata->local; 215 216 might_sleep(); 217 218 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 219 return; 220 221 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 222 BSS_CHANGED_BEACON_ENABLED) && 223 sdata->vif.type != NL80211_IFTYPE_AP && 224 sdata->vif.type != NL80211_IFTYPE_ADHOC && 225 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 226 sdata->vif.type != NL80211_IFTYPE_OCB)) 227 return; 228 229 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 230 sdata->vif.type == NL80211_IFTYPE_NAN || 231 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 232 !sdata->vif.bss_conf.mu_mimo_owner && 233 !(changed & BSS_CHANGED_TXPOWER)))) 234 return; 235 236 if (!check_sdata_in_driver(sdata)) 237 return; 238 239 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 240 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 241 242 trace_drv_vif_cfg_changed(local, sdata, changed); 243 if (local->ops->vif_cfg_changed) 244 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 245 } 246 247 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 248 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 249 250 /* FIXME: should be for each link */ 251 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 252 changed); 253 if (local->ops->link_info_changed) 254 local->ops->link_info_changed(&local->hw, &sdata->vif, 255 &sdata->vif.bss_conf, ch); 256 } 257 258 if (local->ops->bss_info_changed) 259 local->ops->bss_info_changed(&local->hw, &sdata->vif, 260 &sdata->vif.bss_conf, changed); 261 trace_drv_return_void(local); 262 } 263 264 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 265 u64 changed) 266 { 267 struct ieee80211_local *local = sdata->local; 268 269 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 270 271 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 272 return; 273 274 drv_vif_cfg_changed(local, sdata, changed); 275 } 276 277 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 278 struct ieee80211_link_data *link, 279 u64 changed) 280 { 281 struct ieee80211_local *local = sdata->local; 282 283 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 284 285 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 286 return; 287 288 if (!check_sdata_in_driver(sdata)) 289 return; 290 291 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 292 } 293 294 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 295 { 296 sdata->vif.bss_conf.use_cts_prot = false; 297 sdata->vif.bss_conf.use_short_preamble = false; 298 sdata->vif.bss_conf.use_short_slot = false; 299 return BSS_CHANGED_ERP_CTS_PROT | 300 BSS_CHANGED_ERP_PREAMBLE | 301 BSS_CHANGED_ERP_SLOT; 302 } 303 304 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 305 { 306 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 307 struct sk_buff *skb; 308 309 while ((skb = skb_dequeue(&local->skb_queue)) || 310 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 311 switch (skb->pkt_type) { 312 case IEEE80211_RX_MSG: 313 /* Clear skb->pkt_type in order to not confuse kernel 314 * netstack. */ 315 skb->pkt_type = 0; 316 ieee80211_rx(&local->hw, skb); 317 break; 318 case IEEE80211_TX_STATUS_MSG: 319 skb->pkt_type = 0; 320 ieee80211_tx_status(&local->hw, skb); 321 break; 322 default: 323 WARN(1, "mac80211: Packet is of unknown type %d\n", 324 skb->pkt_type); 325 dev_kfree_skb(skb); 326 break; 327 } 328 } 329 } 330 331 static void ieee80211_restart_work(struct work_struct *work) 332 { 333 struct ieee80211_local *local = 334 container_of(work, struct ieee80211_local, restart_work); 335 struct ieee80211_sub_if_data *sdata; 336 int ret; 337 338 /* wait for scan work complete */ 339 flush_workqueue(local->workqueue); 340 flush_work(&local->sched_scan_stopped_work); 341 flush_work(&local->radar_detected_work); 342 343 rtnl_lock(); 344 /* we might do interface manipulations, so need both */ 345 wiphy_lock(local->hw.wiphy); 346 347 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 348 "%s called with hardware scan in progress\n", __func__); 349 350 list_for_each_entry(sdata, &local->interfaces, list) { 351 /* 352 * XXX: there may be more work for other vif types and even 353 * for station mode: a good thing would be to run most of 354 * the iface type's dependent _stop (ieee80211_mg_stop, 355 * ieee80211_ibss_stop) etc... 356 * For now, fix only the specific bug that was seen: race 357 * between csa_connection_drop_work and us. 358 */ 359 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 360 /* 361 * This worker is scheduled from the iface worker that 362 * runs on mac80211's workqueue, so we can't be 363 * scheduling this worker after the cancel right here. 364 * The exception is ieee80211_chswitch_done. 365 * Then we can have a race... 366 */ 367 wiphy_work_cancel(local->hw.wiphy, 368 &sdata->u.mgd.csa_connection_drop_work); 369 if (sdata->vif.bss_conf.csa_active) { 370 sdata_lock(sdata); 371 ieee80211_sta_connection_lost(sdata, 372 WLAN_REASON_UNSPECIFIED, 373 false); 374 sdata_unlock(sdata); 375 } 376 } 377 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 378 } 379 ieee80211_scan_cancel(local); 380 381 /* make sure any new ROC will consider local->in_reconfig */ 382 flush_delayed_work(&local->roc_work); 383 flush_work(&local->hw_roc_done); 384 385 /* wait for all packet processing to be done */ 386 synchronize_net(); 387 388 ret = ieee80211_reconfig(local); 389 wiphy_unlock(local->hw.wiphy); 390 391 if (ret) 392 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 393 394 rtnl_unlock(); 395 } 396 397 void ieee80211_restart_hw(struct ieee80211_hw *hw) 398 { 399 struct ieee80211_local *local = hw_to_local(hw); 400 401 trace_api_restart_hw(local); 402 403 wiphy_info(hw->wiphy, 404 "Hardware restart was requested\n"); 405 406 /* use this reason, ieee80211_reconfig will unblock it */ 407 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 408 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 409 false); 410 411 /* 412 * Stop all Rx during the reconfig. We don't want state changes 413 * or driver callbacks while this is in progress. 414 */ 415 local->in_reconfig = true; 416 barrier(); 417 418 queue_work(system_freezable_wq, &local->restart_work); 419 } 420 EXPORT_SYMBOL(ieee80211_restart_hw); 421 422 #ifdef CONFIG_INET 423 static int ieee80211_ifa_changed(struct notifier_block *nb, 424 unsigned long data, void *arg) 425 { 426 struct in_ifaddr *ifa = arg; 427 struct ieee80211_local *local = 428 container_of(nb, struct ieee80211_local, 429 ifa_notifier); 430 struct net_device *ndev = ifa->ifa_dev->dev; 431 struct wireless_dev *wdev = ndev->ieee80211_ptr; 432 struct in_device *idev; 433 struct ieee80211_sub_if_data *sdata; 434 struct ieee80211_vif_cfg *vif_cfg; 435 struct ieee80211_if_managed *ifmgd; 436 int c = 0; 437 438 /* Make sure it's our interface that got changed */ 439 if (!wdev) 440 return NOTIFY_DONE; 441 442 if (wdev->wiphy != local->hw.wiphy) 443 return NOTIFY_DONE; 444 445 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 446 vif_cfg = &sdata->vif.cfg; 447 448 /* ARP filtering is only supported in managed mode */ 449 if (sdata->vif.type != NL80211_IFTYPE_STATION) 450 return NOTIFY_DONE; 451 452 idev = __in_dev_get_rtnl(sdata->dev); 453 if (!idev) 454 return NOTIFY_DONE; 455 456 ifmgd = &sdata->u.mgd; 457 sdata_lock(sdata); 458 459 /* Copy the addresses to the vif config list */ 460 ifa = rtnl_dereference(idev->ifa_list); 461 while (ifa) { 462 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 463 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 464 ifa = rtnl_dereference(ifa->ifa_next); 465 c++; 466 } 467 468 vif_cfg->arp_addr_cnt = c; 469 470 /* Configure driver only if associated (which also implies it is up) */ 471 if (ifmgd->associated) 472 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 473 474 sdata_unlock(sdata); 475 476 return NOTIFY_OK; 477 } 478 #endif 479 480 #if IS_ENABLED(CONFIG_IPV6) 481 static int ieee80211_ifa6_changed(struct notifier_block *nb, 482 unsigned long data, void *arg) 483 { 484 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 485 struct inet6_dev *idev = ifa->idev; 486 struct net_device *ndev = ifa->idev->dev; 487 struct ieee80211_local *local = 488 container_of(nb, struct ieee80211_local, ifa6_notifier); 489 struct wireless_dev *wdev = ndev->ieee80211_ptr; 490 struct ieee80211_sub_if_data *sdata; 491 492 /* Make sure it's our interface that got changed */ 493 if (!wdev || wdev->wiphy != local->hw.wiphy) 494 return NOTIFY_DONE; 495 496 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 497 498 /* 499 * For now only support station mode. This is mostly because 500 * doing AP would have to handle AP_VLAN in some way ... 501 */ 502 if (sdata->vif.type != NL80211_IFTYPE_STATION) 503 return NOTIFY_DONE; 504 505 drv_ipv6_addr_change(local, sdata, idev); 506 507 return NOTIFY_OK; 508 } 509 #endif 510 511 /* There isn't a lot of sense in it, but you can transmit anything you like */ 512 static const struct ieee80211_txrx_stypes 513 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 514 [NL80211_IFTYPE_ADHOC] = { 515 .tx = 0xffff, 516 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 517 BIT(IEEE80211_STYPE_AUTH >> 4) | 518 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 519 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 520 }, 521 [NL80211_IFTYPE_STATION] = { 522 .tx = 0xffff, 523 /* 524 * To support Pre Association Security Negotiation (PASN) while 525 * already associated to one AP, allow user space to register to 526 * Rx authentication frames, so that the user space logic would 527 * be able to receive/handle authentication frames from a 528 * different AP as part of PASN. 529 * It is expected that user space would intelligently register 530 * for Rx authentication frames, i.e., only when PASN is used 531 * and configure a match filter only for PASN authentication 532 * algorithm, as otherwise the MLME functionality of mac80211 533 * would be broken. 534 */ 535 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 536 BIT(IEEE80211_STYPE_AUTH >> 4) | 537 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 538 }, 539 [NL80211_IFTYPE_AP] = { 540 .tx = 0xffff, 541 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 542 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 543 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 544 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 545 BIT(IEEE80211_STYPE_AUTH >> 4) | 546 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 547 BIT(IEEE80211_STYPE_ACTION >> 4), 548 }, 549 [NL80211_IFTYPE_AP_VLAN] = { 550 /* copy AP */ 551 .tx = 0xffff, 552 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 553 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 554 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 555 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 556 BIT(IEEE80211_STYPE_AUTH >> 4) | 557 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 558 BIT(IEEE80211_STYPE_ACTION >> 4), 559 }, 560 [NL80211_IFTYPE_P2P_CLIENT] = { 561 .tx = 0xffff, 562 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 563 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 564 }, 565 [NL80211_IFTYPE_P2P_GO] = { 566 .tx = 0xffff, 567 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 568 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 569 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 570 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 571 BIT(IEEE80211_STYPE_AUTH >> 4) | 572 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 573 BIT(IEEE80211_STYPE_ACTION >> 4), 574 }, 575 [NL80211_IFTYPE_MESH_POINT] = { 576 .tx = 0xffff, 577 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 578 BIT(IEEE80211_STYPE_AUTH >> 4) | 579 BIT(IEEE80211_STYPE_DEAUTH >> 4), 580 }, 581 [NL80211_IFTYPE_P2P_DEVICE] = { 582 .tx = 0xffff, 583 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 584 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 585 }, 586 }; 587 588 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 589 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 590 IEEE80211_HT_AMPDU_PARM_DENSITY, 591 592 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 593 IEEE80211_HT_CAP_MAX_AMSDU | 594 IEEE80211_HT_CAP_SGI_20 | 595 IEEE80211_HT_CAP_SGI_40 | 596 IEEE80211_HT_CAP_TX_STBC | 597 IEEE80211_HT_CAP_RX_STBC | 598 IEEE80211_HT_CAP_LDPC_CODING | 599 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 600 .mcs = { 601 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 602 0xff, 0xff, 0xff, 0xff, 0xff, }, 603 }, 604 }; 605 606 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 607 .vht_cap_info = 608 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 609 IEEE80211_VHT_CAP_SHORT_GI_80 | 610 IEEE80211_VHT_CAP_SHORT_GI_160 | 611 IEEE80211_VHT_CAP_RXSTBC_MASK | 612 IEEE80211_VHT_CAP_TXSTBC | 613 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 614 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 615 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 616 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 617 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 618 .supp_mcs = { 619 .rx_mcs_map = cpu_to_le16(~0), 620 .tx_mcs_map = cpu_to_le16(~0), 621 }, 622 }; 623 624 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 625 const struct ieee80211_ops *ops, 626 const char *requested_name) 627 { 628 struct ieee80211_local *local; 629 int priv_size, i; 630 struct wiphy *wiphy; 631 bool use_chanctx; 632 633 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 634 !ops->add_interface || !ops->remove_interface || 635 !ops->configure_filter || !ops->wake_tx_queue)) 636 return NULL; 637 638 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 639 return NULL; 640 641 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 642 (ops->link_info_changed && ops->bss_info_changed))) 643 return NULL; 644 645 /* check all or no channel context operations exist */ 646 i = !!ops->add_chanctx + !!ops->remove_chanctx + 647 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 648 !!ops->unassign_vif_chanctx; 649 if (WARN_ON(i != 0 && i != 5)) 650 return NULL; 651 use_chanctx = i == 5; 652 653 /* Ensure 32-byte alignment of our private data and hw private data. 654 * We use the wiphy priv data for both our ieee80211_local and for 655 * the driver's private data 656 * 657 * In memory it'll be like this: 658 * 659 * +-------------------------+ 660 * | struct wiphy | 661 * +-------------------------+ 662 * | struct ieee80211_local | 663 * +-------------------------+ 664 * | driver's private data | 665 * +-------------------------+ 666 * 667 */ 668 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 669 670 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 671 672 if (!wiphy) 673 return NULL; 674 675 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 676 677 wiphy->privid = mac80211_wiphy_privid; 678 679 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 680 WIPHY_FLAG_4ADDR_AP | 681 WIPHY_FLAG_4ADDR_STATION | 682 WIPHY_FLAG_REPORTS_OBSS | 683 WIPHY_FLAG_OFFCHAN_TX; 684 685 if (!use_chanctx || ops->remain_on_channel) 686 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 687 688 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 689 NL80211_FEATURE_SAE | 690 NL80211_FEATURE_HT_IBSS | 691 NL80211_FEATURE_VIF_TXPOWER | 692 NL80211_FEATURE_MAC_ON_CREATE | 693 NL80211_FEATURE_USERSPACE_MPM | 694 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 695 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 696 wiphy_ext_feature_set(wiphy, 697 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 698 wiphy_ext_feature_set(wiphy, 699 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 700 wiphy_ext_feature_set(wiphy, 701 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 702 wiphy_ext_feature_set(wiphy, 703 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 704 wiphy_ext_feature_set(wiphy, 705 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 706 707 if (!ops->hw_scan) { 708 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 709 NL80211_FEATURE_AP_SCAN; 710 /* 711 * if the driver behaves correctly using the probe request 712 * (template) from mac80211, then both of these should be 713 * supported even with hw scan - but let drivers opt in. 714 */ 715 wiphy_ext_feature_set(wiphy, 716 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 717 wiphy_ext_feature_set(wiphy, 718 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 719 } 720 721 if (!ops->set_key) 722 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 723 724 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 725 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 726 727 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 728 729 local = wiphy_priv(wiphy); 730 731 if (sta_info_init(local)) 732 goto err_free; 733 734 local->hw.wiphy = wiphy; 735 736 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 737 738 local->ops = ops; 739 local->use_chanctx = use_chanctx; 740 741 /* 742 * We need a bit of data queued to build aggregates properly, so 743 * instruct the TCP stack to allow more than a single ms of data 744 * to be queued in the stack. The value is a bit-shift of 1 745 * second, so 7 is ~8ms of queued data. Only affects local TCP 746 * sockets. 747 * This is the default, anyhow - drivers may need to override it 748 * for local reasons (longer buffers, longer completion time, or 749 * similar). 750 */ 751 local->hw.tx_sk_pacing_shift = 7; 752 753 /* set up some defaults */ 754 local->hw.queues = 1; 755 local->hw.max_rates = 1; 756 local->hw.max_report_rates = 0; 757 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 758 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 759 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 760 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 761 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 762 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 763 IEEE80211_RADIOTAP_MCS_HAVE_GI | 764 IEEE80211_RADIOTAP_MCS_HAVE_BW; 765 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 766 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 767 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 768 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 769 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 770 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 771 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 772 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 773 774 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 775 776 wiphy->extended_capabilities = local->ext_capa; 777 wiphy->extended_capabilities_mask = local->ext_capa; 778 wiphy->extended_capabilities_len = 779 ARRAY_SIZE(local->ext_capa); 780 781 INIT_LIST_HEAD(&local->interfaces); 782 INIT_LIST_HEAD(&local->mon_list); 783 784 __hw_addr_init(&local->mc_list); 785 786 mutex_init(&local->iflist_mtx); 787 mutex_init(&local->mtx); 788 789 mutex_init(&local->key_mtx); 790 spin_lock_init(&local->filter_lock); 791 spin_lock_init(&local->rx_path_lock); 792 spin_lock_init(&local->queue_stop_reason_lock); 793 794 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 795 INIT_LIST_HEAD(&local->active_txqs[i]); 796 spin_lock_init(&local->active_txq_lock[i]); 797 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 798 local->aql_txq_limit_high[i] = 799 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 800 atomic_set(&local->aql_ac_pending_airtime[i], 0); 801 } 802 803 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 804 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 805 atomic_set(&local->aql_total_pending_airtime, 0); 806 807 spin_lock_init(&local->handle_wake_tx_queue_lock); 808 809 INIT_LIST_HEAD(&local->chanctx_list); 810 mutex_init(&local->chanctx_mtx); 811 812 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 813 814 INIT_WORK(&local->restart_work, ieee80211_restart_work); 815 816 INIT_WORK(&local->radar_detected_work, 817 ieee80211_dfs_radar_detected_work); 818 819 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 820 local->smps_mode = IEEE80211_SMPS_OFF; 821 822 INIT_WORK(&local->dynamic_ps_enable_work, 823 ieee80211_dynamic_ps_enable_work); 824 INIT_WORK(&local->dynamic_ps_disable_work, 825 ieee80211_dynamic_ps_disable_work); 826 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 827 828 INIT_WORK(&local->sched_scan_stopped_work, 829 ieee80211_sched_scan_stopped_work); 830 831 spin_lock_init(&local->ack_status_lock); 832 idr_init(&local->ack_status_frames); 833 834 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 835 skb_queue_head_init(&local->pending[i]); 836 atomic_set(&local->agg_queue_stop[i], 0); 837 } 838 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 839 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 840 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 841 842 skb_queue_head_init(&local->skb_queue); 843 skb_queue_head_init(&local->skb_queue_unreliable); 844 845 ieee80211_alloc_led_names(local); 846 847 ieee80211_roc_setup(local); 848 849 local->hw.radiotap_timestamp.units_pos = -1; 850 local->hw.radiotap_timestamp.accuracy = -1; 851 852 return &local->hw; 853 err_free: 854 wiphy_free(wiphy); 855 return NULL; 856 } 857 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 858 859 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 860 { 861 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 862 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 863 int r = 0, w = 0; 864 u32 *suites; 865 static const u32 cipher_suites[] = { 866 /* keep WEP first, it may be removed below */ 867 WLAN_CIPHER_SUITE_WEP40, 868 WLAN_CIPHER_SUITE_WEP104, 869 WLAN_CIPHER_SUITE_TKIP, 870 WLAN_CIPHER_SUITE_CCMP, 871 WLAN_CIPHER_SUITE_CCMP_256, 872 WLAN_CIPHER_SUITE_GCMP, 873 WLAN_CIPHER_SUITE_GCMP_256, 874 875 /* keep last -- depends on hw flags! */ 876 WLAN_CIPHER_SUITE_AES_CMAC, 877 WLAN_CIPHER_SUITE_BIP_CMAC_256, 878 WLAN_CIPHER_SUITE_BIP_GMAC_128, 879 WLAN_CIPHER_SUITE_BIP_GMAC_256, 880 }; 881 882 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 883 local->hw.wiphy->cipher_suites) { 884 /* If the driver advertises, or doesn't support SW crypto, 885 * we only need to remove WEP if necessary. 886 */ 887 if (have_wep) 888 return 0; 889 890 /* well if it has _no_ ciphers ... fine */ 891 if (!local->hw.wiphy->n_cipher_suites) 892 return 0; 893 894 /* Driver provides cipher suites, but we need to exclude WEP */ 895 suites = kmemdup(local->hw.wiphy->cipher_suites, 896 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 897 GFP_KERNEL); 898 if (!suites) 899 return -ENOMEM; 900 901 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 902 u32 suite = local->hw.wiphy->cipher_suites[r]; 903 904 if (suite == WLAN_CIPHER_SUITE_WEP40 || 905 suite == WLAN_CIPHER_SUITE_WEP104) 906 continue; 907 suites[w++] = suite; 908 } 909 } else { 910 /* assign the (software supported and perhaps offloaded) 911 * cipher suites 912 */ 913 local->hw.wiphy->cipher_suites = cipher_suites; 914 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 915 916 if (!have_mfp) 917 local->hw.wiphy->n_cipher_suites -= 4; 918 919 if (!have_wep) { 920 local->hw.wiphy->cipher_suites += 2; 921 local->hw.wiphy->n_cipher_suites -= 2; 922 } 923 924 /* not dynamically allocated, so just return */ 925 return 0; 926 } 927 928 local->hw.wiphy->cipher_suites = suites; 929 local->hw.wiphy->n_cipher_suites = w; 930 local->wiphy_ciphers_allocated = true; 931 932 return 0; 933 } 934 935 int ieee80211_register_hw(struct ieee80211_hw *hw) 936 { 937 struct ieee80211_local *local = hw_to_local(hw); 938 int result, i; 939 enum nl80211_band band; 940 int channels, max_bitrates; 941 bool supp_ht, supp_vht, supp_he, supp_eht; 942 struct cfg80211_chan_def dflt_chandef = {}; 943 944 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 945 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 946 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 947 return -EINVAL; 948 949 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 950 (!local->ops->tdls_channel_switch || 951 !local->ops->tdls_cancel_channel_switch || 952 !local->ops->tdls_recv_channel_switch)) 953 return -EOPNOTSUPP; 954 955 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 956 !local->ops->set_frag_threshold)) 957 return -EINVAL; 958 959 if (WARN_ON(local->hw.wiphy->interface_modes & 960 BIT(NL80211_IFTYPE_NAN) && 961 (!local->ops->start_nan || !local->ops->stop_nan))) 962 return -EINVAL; 963 964 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 965 /* 966 * For drivers capable of doing MLO, assume modern driver 967 * or firmware facilities, so software doesn't have to do 968 * as much, e.g. monitoring beacons would be hard if we 969 * might not even know which link is active at which time. 970 */ 971 if (WARN_ON(!local->use_chanctx)) 972 return -EINVAL; 973 974 if (WARN_ON(!local->ops->link_info_changed)) 975 return -EINVAL; 976 977 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 978 return -EINVAL; 979 980 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 981 return -EINVAL; 982 983 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 984 return -EINVAL; 985 986 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 987 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 988 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 989 return -EINVAL; 990 991 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 992 return -EINVAL; 993 994 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 995 return -EINVAL; 996 997 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 998 return -EINVAL; 999 1000 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1001 return -EINVAL; 1002 1003 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1004 return -EINVAL; 1005 1006 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1007 return -EINVAL; 1008 } 1009 1010 #ifdef CONFIG_PM 1011 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1012 return -EINVAL; 1013 #endif 1014 1015 if (!local->use_chanctx) { 1016 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1017 const struct ieee80211_iface_combination *comb; 1018 1019 comb = &local->hw.wiphy->iface_combinations[i]; 1020 1021 if (comb->num_different_channels > 1) 1022 return -EINVAL; 1023 } 1024 } else { 1025 /* DFS is not supported with multi-channel combinations yet */ 1026 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1027 const struct ieee80211_iface_combination *comb; 1028 1029 comb = &local->hw.wiphy->iface_combinations[i]; 1030 1031 if (comb->radar_detect_widths && 1032 comb->num_different_channels > 1) 1033 return -EINVAL; 1034 } 1035 } 1036 1037 /* Only HW csum features are currently compatible with mac80211 */ 1038 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1039 return -EINVAL; 1040 1041 if (hw->max_report_rates == 0) 1042 hw->max_report_rates = hw->max_rates; 1043 1044 local->rx_chains = 1; 1045 1046 /* 1047 * generic code guarantees at least one band, 1048 * set this very early because much code assumes 1049 * that hw.conf.channel is assigned 1050 */ 1051 channels = 0; 1052 max_bitrates = 0; 1053 supp_ht = false; 1054 supp_vht = false; 1055 supp_he = false; 1056 supp_eht = false; 1057 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1058 struct ieee80211_supported_band *sband; 1059 1060 sband = local->hw.wiphy->bands[band]; 1061 if (!sband) 1062 continue; 1063 1064 if (!dflt_chandef.chan) { 1065 /* 1066 * Assign the first enabled channel to dflt_chandef 1067 * from the list of channels 1068 */ 1069 for (i = 0; i < sband->n_channels; i++) 1070 if (!(sband->channels[i].flags & 1071 IEEE80211_CHAN_DISABLED)) 1072 break; 1073 /* if none found then use the first anyway */ 1074 if (i == sband->n_channels) 1075 i = 0; 1076 cfg80211_chandef_create(&dflt_chandef, 1077 &sband->channels[i], 1078 NL80211_CHAN_NO_HT); 1079 /* init channel we're on */ 1080 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1081 local->hw.conf.chandef = dflt_chandef; 1082 local->_oper_chandef = dflt_chandef; 1083 } 1084 local->monitor_chandef = dflt_chandef; 1085 } 1086 1087 channels += sband->n_channels; 1088 1089 /* 1090 * Due to the way the aggregation code handles this and it 1091 * being an HT capability, we can't really support delayed 1092 * BA in MLO (yet). 1093 */ 1094 if (WARN_ON(sband->ht_cap.ht_supported && 1095 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1096 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1097 return -EINVAL; 1098 1099 if (max_bitrates < sband->n_bitrates) 1100 max_bitrates = sband->n_bitrates; 1101 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1102 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1103 1104 for (i = 0; i < sband->n_iftype_data; i++) { 1105 const struct ieee80211_sband_iftype_data *iftd; 1106 1107 iftd = &sband->iftype_data[i]; 1108 1109 supp_he = supp_he || iftd->he_cap.has_he; 1110 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1111 } 1112 1113 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1114 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1115 (supp_ht || supp_vht || supp_he))) 1116 return -EINVAL; 1117 1118 /* EHT requires HE support */ 1119 if (WARN_ON(supp_eht && !supp_he)) 1120 return -EINVAL; 1121 1122 if (!sband->ht_cap.ht_supported) 1123 continue; 1124 1125 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1126 local->rx_chains = 1127 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1128 local->rx_chains); 1129 1130 /* no need to mask, SM_PS_DISABLED has all bits set */ 1131 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1132 IEEE80211_HT_CAP_SM_PS_SHIFT; 1133 } 1134 1135 /* if low-level driver supports AP, we also support VLAN. 1136 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1137 * based on their support to transmit SW encrypted packets. 1138 */ 1139 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1140 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1141 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1142 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1143 } 1144 1145 /* mac80211 always supports monitor */ 1146 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1147 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1148 1149 /* mac80211 doesn't support more than one IBSS interface right now */ 1150 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1151 const struct ieee80211_iface_combination *c; 1152 int j; 1153 1154 c = &hw->wiphy->iface_combinations[i]; 1155 1156 for (j = 0; j < c->n_limits; j++) 1157 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1158 c->limits[j].max > 1) 1159 return -EINVAL; 1160 } 1161 1162 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1163 sizeof(void *) * channels, GFP_KERNEL); 1164 if (!local->int_scan_req) 1165 return -ENOMEM; 1166 1167 eth_broadcast_addr(local->int_scan_req->bssid); 1168 1169 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1170 if (!local->hw.wiphy->bands[band]) 1171 continue; 1172 local->int_scan_req->rates[band] = (u32) -1; 1173 } 1174 1175 #ifndef CONFIG_MAC80211_MESH 1176 /* mesh depends on Kconfig, but drivers should set it if they want */ 1177 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1178 #endif 1179 1180 /* if the underlying driver supports mesh, mac80211 will (at least) 1181 * provide routing of mesh authentication frames to userspace */ 1182 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1183 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1184 1185 /* mac80211 supports control port protocol changing */ 1186 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1187 1188 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1189 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1190 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1191 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1192 if (hw->max_signal <= 0) { 1193 result = -EINVAL; 1194 goto fail_workqueue; 1195 } 1196 } 1197 1198 /* Mac80211 and therefore all drivers using SW crypto only 1199 * are able to handle PTK rekeys and Extended Key ID. 1200 */ 1201 if (!local->ops->set_key) { 1202 wiphy_ext_feature_set(local->hw.wiphy, 1203 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1204 wiphy_ext_feature_set(local->hw.wiphy, 1205 NL80211_EXT_FEATURE_EXT_KEY_ID); 1206 } 1207 1208 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1209 wiphy_ext_feature_set(local->hw.wiphy, 1210 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1211 1212 /* 1213 * Calculate scan IE length -- we need this to alloc 1214 * memory and to subtract from the driver limit. It 1215 * includes the DS Params, (extended) supported rates, and HT 1216 * information -- SSID is the driver's responsibility. 1217 */ 1218 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1219 3 /* DS Params */; 1220 if (supp_ht) 1221 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1222 1223 if (supp_vht) 1224 local->scan_ies_len += 1225 2 + sizeof(struct ieee80211_vht_cap); 1226 1227 /* 1228 * HE cap element is variable in size - set len to allow max size */ 1229 if (supp_he) { 1230 local->scan_ies_len += 1231 3 + sizeof(struct ieee80211_he_cap_elem) + 1232 sizeof(struct ieee80211_he_mcs_nss_supp) + 1233 IEEE80211_HE_PPE_THRES_MAX_LEN; 1234 1235 if (supp_eht) 1236 local->scan_ies_len += 1237 3 + sizeof(struct ieee80211_eht_cap_elem) + 1238 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1239 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1240 } 1241 1242 if (!local->ops->hw_scan) { 1243 /* For hw_scan, driver needs to set these up. */ 1244 local->hw.wiphy->max_scan_ssids = 4; 1245 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1246 } 1247 1248 /* 1249 * If the driver supports any scan IEs, then assume the 1250 * limit includes the IEs mac80211 will add, otherwise 1251 * leave it at zero and let the driver sort it out; we 1252 * still pass our IEs to the driver but userspace will 1253 * not be allowed to in that case. 1254 */ 1255 if (local->hw.wiphy->max_scan_ie_len) 1256 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1257 1258 result = ieee80211_init_cipher_suites(local); 1259 if (result < 0) 1260 goto fail_workqueue; 1261 1262 if (!local->ops->remain_on_channel) 1263 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1264 1265 /* mac80211 based drivers don't support internal TDLS setup */ 1266 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1267 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1268 1269 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1270 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1271 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1272 1273 /* mac80211 supports multi BSSID, if the driver supports it */ 1274 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1275 local->hw.wiphy->support_mbssid = true; 1276 if (ieee80211_hw_check(&local->hw, 1277 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1278 local->hw.wiphy->support_only_he_mbssid = true; 1279 else 1280 local->ext_capa[2] |= 1281 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1282 } 1283 1284 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1285 1286 /* 1287 * We use the number of queues for feature tests (QoS, HT) internally 1288 * so restrict them appropriately. 1289 */ 1290 if (hw->queues > IEEE80211_MAX_QUEUES) 1291 hw->queues = IEEE80211_MAX_QUEUES; 1292 1293 local->workqueue = 1294 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1295 if (!local->workqueue) { 1296 result = -ENOMEM; 1297 goto fail_workqueue; 1298 } 1299 1300 /* 1301 * The hardware needs headroom for sending the frame, 1302 * and we need some headroom for passing the frame to monitor 1303 * interfaces, but never both at the same time. 1304 */ 1305 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1306 IEEE80211_TX_STATUS_HEADROOM); 1307 1308 /* 1309 * if the driver doesn't specify a max listen interval we 1310 * use 5 which should be a safe default 1311 */ 1312 if (local->hw.max_listen_interval == 0) 1313 local->hw.max_listen_interval = 5; 1314 1315 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1316 1317 local->dynamic_ps_forced_timeout = -1; 1318 1319 if (!local->hw.max_nan_de_entries) 1320 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1321 1322 if (!local->hw.weight_multiplier) 1323 local->hw.weight_multiplier = 1; 1324 1325 ieee80211_wep_init(local); 1326 1327 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1328 1329 ieee80211_led_init(local); 1330 1331 result = ieee80211_txq_setup_flows(local); 1332 if (result) 1333 goto fail_flows; 1334 1335 rtnl_lock(); 1336 result = ieee80211_init_rate_ctrl_alg(local, 1337 hw->rate_control_algorithm); 1338 rtnl_unlock(); 1339 if (result < 0) { 1340 wiphy_debug(local->hw.wiphy, 1341 "Failed to initialize rate control algorithm\n"); 1342 goto fail_rate; 1343 } 1344 1345 if (local->rate_ctrl) { 1346 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1347 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1348 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1349 } 1350 1351 /* 1352 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1353 * or have it when we don't, copy the sband structure and set/clear it. 1354 * This is necessary because rate scaling algorithms could be switched 1355 * and have different support values. 1356 * Print a message so that in the common case the reallocation can be 1357 * avoided. 1358 */ 1359 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1360 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1361 struct ieee80211_supported_band *sband; 1362 bool local_cap, ie_cap; 1363 1364 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1365 1366 sband = local->hw.wiphy->bands[band]; 1367 if (!sband || !sband->vht_cap.vht_supported) 1368 continue; 1369 1370 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1371 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1372 1373 if (local_cap == ie_cap) 1374 continue; 1375 1376 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1377 if (!sband) { 1378 result = -ENOMEM; 1379 goto fail_rate; 1380 } 1381 1382 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1383 band); 1384 1385 sband->vht_cap.vht_mcs.tx_highest ^= 1386 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1387 1388 local->hw.wiphy->bands[band] = sband; 1389 local->sband_allocated |= BIT(band); 1390 } 1391 1392 result = wiphy_register(local->hw.wiphy); 1393 if (result < 0) 1394 goto fail_wiphy_register; 1395 1396 debugfs_hw_add(local); 1397 rate_control_add_debugfs(local); 1398 1399 rtnl_lock(); 1400 wiphy_lock(hw->wiphy); 1401 1402 /* add one default STA interface if supported */ 1403 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1404 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1405 struct vif_params params = {0}; 1406 1407 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1408 NL80211_IFTYPE_STATION, ¶ms); 1409 if (result) 1410 wiphy_warn(local->hw.wiphy, 1411 "Failed to add default virtual iface\n"); 1412 } 1413 1414 wiphy_unlock(hw->wiphy); 1415 rtnl_unlock(); 1416 1417 #ifdef CONFIG_INET 1418 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1419 result = register_inetaddr_notifier(&local->ifa_notifier); 1420 if (result) 1421 goto fail_ifa; 1422 #endif 1423 1424 #if IS_ENABLED(CONFIG_IPV6) 1425 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1426 result = register_inet6addr_notifier(&local->ifa6_notifier); 1427 if (result) 1428 goto fail_ifa6; 1429 #endif 1430 1431 return 0; 1432 1433 #if IS_ENABLED(CONFIG_IPV6) 1434 fail_ifa6: 1435 #ifdef CONFIG_INET 1436 unregister_inetaddr_notifier(&local->ifa_notifier); 1437 #endif 1438 #endif 1439 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1440 fail_ifa: 1441 #endif 1442 wiphy_unregister(local->hw.wiphy); 1443 fail_wiphy_register: 1444 rtnl_lock(); 1445 rate_control_deinitialize(local); 1446 ieee80211_remove_interfaces(local); 1447 rtnl_unlock(); 1448 fail_rate: 1449 fail_flows: 1450 ieee80211_led_exit(local); 1451 destroy_workqueue(local->workqueue); 1452 fail_workqueue: 1453 if (local->wiphy_ciphers_allocated) { 1454 kfree(local->hw.wiphy->cipher_suites); 1455 local->wiphy_ciphers_allocated = false; 1456 } 1457 kfree(local->int_scan_req); 1458 return result; 1459 } 1460 EXPORT_SYMBOL(ieee80211_register_hw); 1461 1462 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1463 { 1464 struct ieee80211_local *local = hw_to_local(hw); 1465 1466 tasklet_kill(&local->tx_pending_tasklet); 1467 tasklet_kill(&local->tasklet); 1468 1469 #ifdef CONFIG_INET 1470 unregister_inetaddr_notifier(&local->ifa_notifier); 1471 #endif 1472 #if IS_ENABLED(CONFIG_IPV6) 1473 unregister_inet6addr_notifier(&local->ifa6_notifier); 1474 #endif 1475 1476 rtnl_lock(); 1477 1478 /* 1479 * At this point, interface list manipulations are fine 1480 * because the driver cannot be handing us frames any 1481 * more and the tasklet is killed. 1482 */ 1483 ieee80211_remove_interfaces(local); 1484 1485 rtnl_unlock(); 1486 1487 cancel_delayed_work_sync(&local->roc_work); 1488 cancel_work_sync(&local->restart_work); 1489 cancel_work_sync(&local->reconfig_filter); 1490 flush_work(&local->sched_scan_stopped_work); 1491 flush_work(&local->radar_detected_work); 1492 1493 ieee80211_clear_tx_pending(local); 1494 rate_control_deinitialize(local); 1495 1496 if (skb_queue_len(&local->skb_queue) || 1497 skb_queue_len(&local->skb_queue_unreliable)) 1498 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1499 skb_queue_purge(&local->skb_queue); 1500 skb_queue_purge(&local->skb_queue_unreliable); 1501 1502 wiphy_unregister(local->hw.wiphy); 1503 destroy_workqueue(local->workqueue); 1504 ieee80211_led_exit(local); 1505 kfree(local->int_scan_req); 1506 } 1507 EXPORT_SYMBOL(ieee80211_unregister_hw); 1508 1509 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1510 { 1511 WARN_ONCE(1, "Have pending ack frames!\n"); 1512 kfree_skb(p); 1513 return 0; 1514 } 1515 1516 void ieee80211_free_hw(struct ieee80211_hw *hw) 1517 { 1518 struct ieee80211_local *local = hw_to_local(hw); 1519 enum nl80211_band band; 1520 1521 mutex_destroy(&local->iflist_mtx); 1522 mutex_destroy(&local->mtx); 1523 1524 if (local->wiphy_ciphers_allocated) { 1525 kfree(local->hw.wiphy->cipher_suites); 1526 local->wiphy_ciphers_allocated = false; 1527 } 1528 1529 idr_for_each(&local->ack_status_frames, 1530 ieee80211_free_ack_frame, NULL); 1531 idr_destroy(&local->ack_status_frames); 1532 1533 sta_info_stop(local); 1534 1535 ieee80211_free_led_names(local); 1536 1537 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1538 if (!(local->sband_allocated & BIT(band))) 1539 continue; 1540 kfree(local->hw.wiphy->bands[band]); 1541 } 1542 1543 wiphy_free(local->hw.wiphy); 1544 } 1545 EXPORT_SYMBOL(ieee80211_free_hw); 1546 1547 static const char * const drop_reasons_monitor[] = { 1548 #define V(x) #x, 1549 [0] = "RX_DROP_MONITOR", 1550 MAC80211_DROP_REASONS_MONITOR(V) 1551 }; 1552 1553 static struct drop_reason_list drop_reason_list_monitor = { 1554 .reasons = drop_reasons_monitor, 1555 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1556 }; 1557 1558 static const char * const drop_reasons_unusable[] = { 1559 [0] = "RX_DROP_UNUSABLE", 1560 MAC80211_DROP_REASONS_UNUSABLE(V) 1561 #undef V 1562 }; 1563 1564 static struct drop_reason_list drop_reason_list_unusable = { 1565 .reasons = drop_reasons_unusable, 1566 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1567 }; 1568 1569 static int __init ieee80211_init(void) 1570 { 1571 struct sk_buff *skb; 1572 int ret; 1573 1574 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1575 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1576 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1577 1578 ret = rc80211_minstrel_init(); 1579 if (ret) 1580 return ret; 1581 1582 ret = ieee80211_iface_init(); 1583 if (ret) 1584 goto err_netdev; 1585 1586 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1587 &drop_reason_list_monitor); 1588 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1589 &drop_reason_list_unusable); 1590 1591 return 0; 1592 err_netdev: 1593 rc80211_minstrel_exit(); 1594 1595 return ret; 1596 } 1597 1598 static void __exit ieee80211_exit(void) 1599 { 1600 rc80211_minstrel_exit(); 1601 1602 ieee80211s_stop(); 1603 1604 ieee80211_iface_exit(); 1605 1606 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1607 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1608 1609 rcu_barrier(); 1610 } 1611 1612 1613 subsys_initcall(ieee80211_init); 1614 module_exit(ieee80211_exit); 1615 1616 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1617 MODULE_LICENSE("GPL"); 1618