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/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 u32 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 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 368 if (sdata->vif.bss_conf.csa_active) { 369 sdata_lock(sdata); 370 ieee80211_sta_connection_lost(sdata, 371 WLAN_REASON_UNSPECIFIED, 372 false); 373 sdata_unlock(sdata); 374 } 375 } 376 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 377 } 378 ieee80211_scan_cancel(local); 379 380 /* make sure any new ROC will consider local->in_reconfig */ 381 flush_delayed_work(&local->roc_work); 382 flush_work(&local->hw_roc_done); 383 384 /* wait for all packet processing to be done */ 385 synchronize_net(); 386 387 ret = ieee80211_reconfig(local); 388 wiphy_unlock(local->hw.wiphy); 389 390 if (ret) 391 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 392 393 rtnl_unlock(); 394 } 395 396 void ieee80211_restart_hw(struct ieee80211_hw *hw) 397 { 398 struct ieee80211_local *local = hw_to_local(hw); 399 400 trace_api_restart_hw(local); 401 402 wiphy_info(hw->wiphy, 403 "Hardware restart was requested\n"); 404 405 /* use this reason, ieee80211_reconfig will unblock it */ 406 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 407 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 408 false); 409 410 /* 411 * Stop all Rx during the reconfig. We don't want state changes 412 * or driver callbacks while this is in progress. 413 */ 414 local->in_reconfig = true; 415 barrier(); 416 417 queue_work(system_freezable_wq, &local->restart_work); 418 } 419 EXPORT_SYMBOL(ieee80211_restart_hw); 420 421 #ifdef CONFIG_INET 422 static int ieee80211_ifa_changed(struct notifier_block *nb, 423 unsigned long data, void *arg) 424 { 425 struct in_ifaddr *ifa = arg; 426 struct ieee80211_local *local = 427 container_of(nb, struct ieee80211_local, 428 ifa_notifier); 429 struct net_device *ndev = ifa->ifa_dev->dev; 430 struct wireless_dev *wdev = ndev->ieee80211_ptr; 431 struct in_device *idev; 432 struct ieee80211_sub_if_data *sdata; 433 struct ieee80211_vif_cfg *vif_cfg; 434 struct ieee80211_if_managed *ifmgd; 435 int c = 0; 436 437 /* Make sure it's our interface that got changed */ 438 if (!wdev) 439 return NOTIFY_DONE; 440 441 if (wdev->wiphy != local->hw.wiphy) 442 return NOTIFY_DONE; 443 444 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 445 vif_cfg = &sdata->vif.cfg; 446 447 /* ARP filtering is only supported in managed mode */ 448 if (sdata->vif.type != NL80211_IFTYPE_STATION) 449 return NOTIFY_DONE; 450 451 idev = __in_dev_get_rtnl(sdata->dev); 452 if (!idev) 453 return NOTIFY_DONE; 454 455 ifmgd = &sdata->u.mgd; 456 sdata_lock(sdata); 457 458 /* Copy the addresses to the vif config list */ 459 ifa = rtnl_dereference(idev->ifa_list); 460 while (ifa) { 461 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 462 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 463 ifa = rtnl_dereference(ifa->ifa_next); 464 c++; 465 } 466 467 vif_cfg->arp_addr_cnt = c; 468 469 /* Configure driver only if associated (which also implies it is up) */ 470 if (ifmgd->associated) 471 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 472 473 sdata_unlock(sdata); 474 475 return NOTIFY_OK; 476 } 477 #endif 478 479 #if IS_ENABLED(CONFIG_IPV6) 480 static int ieee80211_ifa6_changed(struct notifier_block *nb, 481 unsigned long data, void *arg) 482 { 483 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 484 struct inet6_dev *idev = ifa->idev; 485 struct net_device *ndev = ifa->idev->dev; 486 struct ieee80211_local *local = 487 container_of(nb, struct ieee80211_local, ifa6_notifier); 488 struct wireless_dev *wdev = ndev->ieee80211_ptr; 489 struct ieee80211_sub_if_data *sdata; 490 491 /* Make sure it's our interface that got changed */ 492 if (!wdev || wdev->wiphy != local->hw.wiphy) 493 return NOTIFY_DONE; 494 495 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 496 497 /* 498 * For now only support station mode. This is mostly because 499 * doing AP would have to handle AP_VLAN in some way ... 500 */ 501 if (sdata->vif.type != NL80211_IFTYPE_STATION) 502 return NOTIFY_DONE; 503 504 drv_ipv6_addr_change(local, sdata, idev); 505 506 return NOTIFY_OK; 507 } 508 #endif 509 510 /* There isn't a lot of sense in it, but you can transmit anything you like */ 511 static const struct ieee80211_txrx_stypes 512 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 513 [NL80211_IFTYPE_ADHOC] = { 514 .tx = 0xffff, 515 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 516 BIT(IEEE80211_STYPE_AUTH >> 4) | 517 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 518 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 519 }, 520 [NL80211_IFTYPE_STATION] = { 521 .tx = 0xffff, 522 /* 523 * To support Pre Association Security Negotiation (PASN) while 524 * already associated to one AP, allow user space to register to 525 * Rx authentication frames, so that the user space logic would 526 * be able to receive/handle authentication frames from a 527 * different AP as part of PASN. 528 * It is expected that user space would intelligently register 529 * for Rx authentication frames, i.e., only when PASN is used 530 * and configure a match filter only for PASN authentication 531 * algorithm, as otherwise the MLME functionality of mac80211 532 * would be broken. 533 */ 534 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 535 BIT(IEEE80211_STYPE_AUTH >> 4) | 536 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 537 }, 538 [NL80211_IFTYPE_AP] = { 539 .tx = 0xffff, 540 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 541 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 542 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 543 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 544 BIT(IEEE80211_STYPE_AUTH >> 4) | 545 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 546 BIT(IEEE80211_STYPE_ACTION >> 4), 547 }, 548 [NL80211_IFTYPE_AP_VLAN] = { 549 /* copy AP */ 550 .tx = 0xffff, 551 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 552 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 553 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 554 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 555 BIT(IEEE80211_STYPE_AUTH >> 4) | 556 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 557 BIT(IEEE80211_STYPE_ACTION >> 4), 558 }, 559 [NL80211_IFTYPE_P2P_CLIENT] = { 560 .tx = 0xffff, 561 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 562 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 563 }, 564 [NL80211_IFTYPE_P2P_GO] = { 565 .tx = 0xffff, 566 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 567 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 568 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 569 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 570 BIT(IEEE80211_STYPE_AUTH >> 4) | 571 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 572 BIT(IEEE80211_STYPE_ACTION >> 4), 573 }, 574 [NL80211_IFTYPE_MESH_POINT] = { 575 .tx = 0xffff, 576 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 577 BIT(IEEE80211_STYPE_AUTH >> 4) | 578 BIT(IEEE80211_STYPE_DEAUTH >> 4), 579 }, 580 [NL80211_IFTYPE_P2P_DEVICE] = { 581 .tx = 0xffff, 582 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 583 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 584 }, 585 }; 586 587 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 588 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 589 IEEE80211_HT_AMPDU_PARM_DENSITY, 590 591 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 592 IEEE80211_HT_CAP_MAX_AMSDU | 593 IEEE80211_HT_CAP_SGI_20 | 594 IEEE80211_HT_CAP_SGI_40 | 595 IEEE80211_HT_CAP_TX_STBC | 596 IEEE80211_HT_CAP_RX_STBC | 597 IEEE80211_HT_CAP_LDPC_CODING | 598 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 599 .mcs = { 600 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 601 0xff, 0xff, 0xff, 0xff, 0xff, }, 602 }, 603 }; 604 605 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 606 .vht_cap_info = 607 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 608 IEEE80211_VHT_CAP_SHORT_GI_80 | 609 IEEE80211_VHT_CAP_SHORT_GI_160 | 610 IEEE80211_VHT_CAP_RXSTBC_MASK | 611 IEEE80211_VHT_CAP_TXSTBC | 612 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 613 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 614 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 615 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 616 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 617 .supp_mcs = { 618 .rx_mcs_map = cpu_to_le16(~0), 619 .tx_mcs_map = cpu_to_le16(~0), 620 }, 621 }; 622 623 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 624 const struct ieee80211_ops *ops, 625 const char *requested_name) 626 { 627 struct ieee80211_local *local; 628 int priv_size, i; 629 struct wiphy *wiphy; 630 bool use_chanctx; 631 632 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 633 !ops->add_interface || !ops->remove_interface || 634 !ops->configure_filter || !ops->wake_tx_queue)) 635 return NULL; 636 637 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 638 return NULL; 639 640 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 641 (ops->link_info_changed && ops->bss_info_changed))) 642 return NULL; 643 644 /* check all or no channel context operations exist */ 645 i = !!ops->add_chanctx + !!ops->remove_chanctx + 646 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 647 !!ops->unassign_vif_chanctx; 648 if (WARN_ON(i != 0 && i != 5)) 649 return NULL; 650 use_chanctx = i == 5; 651 652 /* Ensure 32-byte alignment of our private data and hw private data. 653 * We use the wiphy priv data for both our ieee80211_local and for 654 * the driver's private data 655 * 656 * In memory it'll be like this: 657 * 658 * +-------------------------+ 659 * | struct wiphy | 660 * +-------------------------+ 661 * | struct ieee80211_local | 662 * +-------------------------+ 663 * | driver's private data | 664 * +-------------------------+ 665 * 666 */ 667 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 668 669 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 670 671 if (!wiphy) 672 return NULL; 673 674 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 675 676 wiphy->privid = mac80211_wiphy_privid; 677 678 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 679 WIPHY_FLAG_4ADDR_AP | 680 WIPHY_FLAG_4ADDR_STATION | 681 WIPHY_FLAG_REPORTS_OBSS | 682 WIPHY_FLAG_OFFCHAN_TX; 683 684 if (!use_chanctx || ops->remain_on_channel) 685 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 686 687 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 688 NL80211_FEATURE_SAE | 689 NL80211_FEATURE_HT_IBSS | 690 NL80211_FEATURE_VIF_TXPOWER | 691 NL80211_FEATURE_MAC_ON_CREATE | 692 NL80211_FEATURE_USERSPACE_MPM | 693 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 694 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 695 wiphy_ext_feature_set(wiphy, 696 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 697 wiphy_ext_feature_set(wiphy, 698 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 699 wiphy_ext_feature_set(wiphy, 700 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 701 wiphy_ext_feature_set(wiphy, 702 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 703 wiphy_ext_feature_set(wiphy, 704 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 705 706 if (!ops->hw_scan) { 707 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 708 NL80211_FEATURE_AP_SCAN; 709 /* 710 * if the driver behaves correctly using the probe request 711 * (template) from mac80211, then both of these should be 712 * supported even with hw scan - but let drivers opt in. 713 */ 714 wiphy_ext_feature_set(wiphy, 715 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 716 wiphy_ext_feature_set(wiphy, 717 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 718 } 719 720 if (!ops->set_key) 721 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 722 723 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 724 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 725 726 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 727 728 local = wiphy_priv(wiphy); 729 730 if (sta_info_init(local)) 731 goto err_free; 732 733 local->hw.wiphy = wiphy; 734 735 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 736 737 local->ops = ops; 738 local->use_chanctx = use_chanctx; 739 740 /* 741 * We need a bit of data queued to build aggregates properly, so 742 * instruct the TCP stack to allow more than a single ms of data 743 * to be queued in the stack. The value is a bit-shift of 1 744 * second, so 7 is ~8ms of queued data. Only affects local TCP 745 * sockets. 746 * This is the default, anyhow - drivers may need to override it 747 * for local reasons (longer buffers, longer completion time, or 748 * similar). 749 */ 750 local->hw.tx_sk_pacing_shift = 7; 751 752 /* set up some defaults */ 753 local->hw.queues = 1; 754 local->hw.max_rates = 1; 755 local->hw.max_report_rates = 0; 756 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 757 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 758 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 759 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 760 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 761 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 762 IEEE80211_RADIOTAP_MCS_HAVE_GI | 763 IEEE80211_RADIOTAP_MCS_HAVE_BW; 764 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 765 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 766 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 767 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 768 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 769 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 770 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 771 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 772 773 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 774 775 wiphy->extended_capabilities = local->ext_capa; 776 wiphy->extended_capabilities_mask = local->ext_capa; 777 wiphy->extended_capabilities_len = 778 ARRAY_SIZE(local->ext_capa); 779 780 INIT_LIST_HEAD(&local->interfaces); 781 INIT_LIST_HEAD(&local->mon_list); 782 783 __hw_addr_init(&local->mc_list); 784 785 mutex_init(&local->iflist_mtx); 786 mutex_init(&local->mtx); 787 788 mutex_init(&local->key_mtx); 789 spin_lock_init(&local->filter_lock); 790 spin_lock_init(&local->rx_path_lock); 791 spin_lock_init(&local->queue_stop_reason_lock); 792 793 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 794 INIT_LIST_HEAD(&local->active_txqs[i]); 795 spin_lock_init(&local->active_txq_lock[i]); 796 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 797 local->aql_txq_limit_high[i] = 798 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 799 atomic_set(&local->aql_ac_pending_airtime[i], 0); 800 } 801 802 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 803 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 804 atomic_set(&local->aql_total_pending_airtime, 0); 805 806 spin_lock_init(&local->handle_wake_tx_queue_lock); 807 808 INIT_LIST_HEAD(&local->chanctx_list); 809 mutex_init(&local->chanctx_mtx); 810 811 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 812 813 INIT_WORK(&local->restart_work, ieee80211_restart_work); 814 815 INIT_WORK(&local->radar_detected_work, 816 ieee80211_dfs_radar_detected_work); 817 818 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 819 local->smps_mode = IEEE80211_SMPS_OFF; 820 821 INIT_WORK(&local->dynamic_ps_enable_work, 822 ieee80211_dynamic_ps_enable_work); 823 INIT_WORK(&local->dynamic_ps_disable_work, 824 ieee80211_dynamic_ps_disable_work); 825 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 826 827 INIT_WORK(&local->sched_scan_stopped_work, 828 ieee80211_sched_scan_stopped_work); 829 830 spin_lock_init(&local->ack_status_lock); 831 idr_init(&local->ack_status_frames); 832 833 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 834 skb_queue_head_init(&local->pending[i]); 835 atomic_set(&local->agg_queue_stop[i], 0); 836 } 837 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 838 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 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 /* 1089 * Due to the way the aggregation code handles this and it 1090 * being an HT capability, we can't really support delayed 1091 * BA in MLO (yet). 1092 */ 1093 if (WARN_ON(sband->ht_cap.ht_supported && 1094 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1095 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1096 return -EINVAL; 1097 1098 if (max_bitrates < sband->n_bitrates) 1099 max_bitrates = sband->n_bitrates; 1100 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1101 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1102 1103 for (i = 0; i < sband->n_iftype_data; i++) { 1104 const struct ieee80211_sband_iftype_data *iftd; 1105 1106 iftd = &sband->iftype_data[i]; 1107 1108 supp_he = supp_he || iftd->he_cap.has_he; 1109 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1110 } 1111 1112 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1113 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1114 (supp_ht || supp_vht || supp_he))) 1115 return -EINVAL; 1116 1117 /* EHT requires HE support */ 1118 if (WARN_ON(supp_eht && !supp_he)) 1119 return -EINVAL; 1120 1121 if (!sband->ht_cap.ht_supported) 1122 continue; 1123 1124 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1125 local->rx_chains = 1126 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1127 local->rx_chains); 1128 1129 /* no need to mask, SM_PS_DISABLED has all bits set */ 1130 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1131 IEEE80211_HT_CAP_SM_PS_SHIFT; 1132 } 1133 1134 /* if low-level driver supports AP, we also support VLAN. 1135 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1136 * based on their support to transmit SW encrypted packets. 1137 */ 1138 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1139 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1140 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1141 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1142 } 1143 1144 /* mac80211 always supports monitor */ 1145 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1146 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1147 1148 /* mac80211 doesn't support more than one IBSS interface right now */ 1149 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1150 const struct ieee80211_iface_combination *c; 1151 int j; 1152 1153 c = &hw->wiphy->iface_combinations[i]; 1154 1155 for (j = 0; j < c->n_limits; j++) 1156 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1157 c->limits[j].max > 1) 1158 return -EINVAL; 1159 } 1160 1161 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1162 sizeof(void *) * channels, GFP_KERNEL); 1163 if (!local->int_scan_req) 1164 return -ENOMEM; 1165 1166 eth_broadcast_addr(local->int_scan_req->bssid); 1167 1168 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1169 if (!local->hw.wiphy->bands[band]) 1170 continue; 1171 local->int_scan_req->rates[band] = (u32) -1; 1172 } 1173 1174 #ifndef CONFIG_MAC80211_MESH 1175 /* mesh depends on Kconfig, but drivers should set it if they want */ 1176 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1177 #endif 1178 1179 /* if the underlying driver supports mesh, mac80211 will (at least) 1180 * provide routing of mesh authentication frames to userspace */ 1181 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1182 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1183 1184 /* mac80211 supports control port protocol changing */ 1185 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1186 1187 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1188 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1189 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1190 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1191 if (hw->max_signal <= 0) { 1192 result = -EINVAL; 1193 goto fail_workqueue; 1194 } 1195 } 1196 1197 /* Mac80211 and therefore all drivers using SW crypto only 1198 * are able to handle PTK rekeys and Extended Key ID. 1199 */ 1200 if (!local->ops->set_key) { 1201 wiphy_ext_feature_set(local->hw.wiphy, 1202 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1203 wiphy_ext_feature_set(local->hw.wiphy, 1204 NL80211_EXT_FEATURE_EXT_KEY_ID); 1205 } 1206 1207 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1208 wiphy_ext_feature_set(local->hw.wiphy, 1209 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1210 1211 /* 1212 * Calculate scan IE length -- we need this to alloc 1213 * memory and to subtract from the driver limit. It 1214 * includes the DS Params, (extended) supported rates, and HT 1215 * information -- SSID is the driver's responsibility. 1216 */ 1217 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1218 3 /* DS Params */; 1219 if (supp_ht) 1220 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1221 1222 if (supp_vht) 1223 local->scan_ies_len += 1224 2 + sizeof(struct ieee80211_vht_cap); 1225 1226 /* 1227 * HE cap element is variable in size - set len to allow max size */ 1228 if (supp_he) { 1229 local->scan_ies_len += 1230 3 + sizeof(struct ieee80211_he_cap_elem) + 1231 sizeof(struct ieee80211_he_mcs_nss_supp) + 1232 IEEE80211_HE_PPE_THRES_MAX_LEN; 1233 1234 if (supp_eht) 1235 local->scan_ies_len += 1236 3 + sizeof(struct ieee80211_eht_cap_elem) + 1237 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1238 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1239 } 1240 1241 if (!local->ops->hw_scan) { 1242 /* For hw_scan, driver needs to set these up. */ 1243 local->hw.wiphy->max_scan_ssids = 4; 1244 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1245 } 1246 1247 /* 1248 * If the driver supports any scan IEs, then assume the 1249 * limit includes the IEs mac80211 will add, otherwise 1250 * leave it at zero and let the driver sort it out; we 1251 * still pass our IEs to the driver but userspace will 1252 * not be allowed to in that case. 1253 */ 1254 if (local->hw.wiphy->max_scan_ie_len) 1255 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1256 1257 result = ieee80211_init_cipher_suites(local); 1258 if (result < 0) 1259 goto fail_workqueue; 1260 1261 if (!local->ops->remain_on_channel) 1262 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1263 1264 /* mac80211 based drivers don't support internal TDLS setup */ 1265 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1266 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1267 1268 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1269 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1270 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1271 1272 /* mac80211 supports multi BSSID, if the driver supports it */ 1273 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1274 local->hw.wiphy->support_mbssid = true; 1275 if (ieee80211_hw_check(&local->hw, 1276 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1277 local->hw.wiphy->support_only_he_mbssid = true; 1278 else 1279 local->ext_capa[2] |= 1280 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1281 } 1282 1283 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1284 1285 /* 1286 * We use the number of queues for feature tests (QoS, HT) internally 1287 * so restrict them appropriately. 1288 */ 1289 if (hw->queues > IEEE80211_MAX_QUEUES) 1290 hw->queues = IEEE80211_MAX_QUEUES; 1291 1292 local->workqueue = 1293 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1294 if (!local->workqueue) { 1295 result = -ENOMEM; 1296 goto fail_workqueue; 1297 } 1298 1299 /* 1300 * The hardware needs headroom for sending the frame, 1301 * and we need some headroom for passing the frame to monitor 1302 * interfaces, but never both at the same time. 1303 */ 1304 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1305 IEEE80211_TX_STATUS_HEADROOM); 1306 1307 /* 1308 * if the driver doesn't specify a max listen interval we 1309 * use 5 which should be a safe default 1310 */ 1311 if (local->hw.max_listen_interval == 0) 1312 local->hw.max_listen_interval = 5; 1313 1314 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1315 1316 local->dynamic_ps_forced_timeout = -1; 1317 1318 if (!local->hw.max_nan_de_entries) 1319 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1320 1321 if (!local->hw.weight_multiplier) 1322 local->hw.weight_multiplier = 1; 1323 1324 ieee80211_wep_init(local); 1325 1326 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1327 1328 ieee80211_led_init(local); 1329 1330 result = ieee80211_txq_setup_flows(local); 1331 if (result) 1332 goto fail_flows; 1333 1334 rtnl_lock(); 1335 result = ieee80211_init_rate_ctrl_alg(local, 1336 hw->rate_control_algorithm); 1337 rtnl_unlock(); 1338 if (result < 0) { 1339 wiphy_debug(local->hw.wiphy, 1340 "Failed to initialize rate control algorithm\n"); 1341 goto fail_rate; 1342 } 1343 1344 if (local->rate_ctrl) { 1345 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1346 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1347 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1348 } 1349 1350 /* 1351 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1352 * or have it when we don't, copy the sband structure and set/clear it. 1353 * This is necessary because rate scaling algorithms could be switched 1354 * and have different support values. 1355 * Print a message so that in the common case the reallocation can be 1356 * avoided. 1357 */ 1358 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1359 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1360 struct ieee80211_supported_band *sband; 1361 bool local_cap, ie_cap; 1362 1363 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1364 1365 sband = local->hw.wiphy->bands[band]; 1366 if (!sband || !sband->vht_cap.vht_supported) 1367 continue; 1368 1369 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1370 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1371 1372 if (local_cap == ie_cap) 1373 continue; 1374 1375 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1376 if (!sband) { 1377 result = -ENOMEM; 1378 goto fail_rate; 1379 } 1380 1381 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1382 band); 1383 1384 sband->vht_cap.vht_mcs.tx_highest ^= 1385 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1386 1387 local->hw.wiphy->bands[band] = sband; 1388 local->sband_allocated |= BIT(band); 1389 } 1390 1391 result = wiphy_register(local->hw.wiphy); 1392 if (result < 0) 1393 goto fail_wiphy_register; 1394 1395 debugfs_hw_add(local); 1396 rate_control_add_debugfs(local); 1397 1398 rtnl_lock(); 1399 wiphy_lock(hw->wiphy); 1400 1401 /* add one default STA interface if supported */ 1402 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1403 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1404 struct vif_params params = {0}; 1405 1406 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1407 NL80211_IFTYPE_STATION, ¶ms); 1408 if (result) 1409 wiphy_warn(local->hw.wiphy, 1410 "Failed to add default virtual iface\n"); 1411 } 1412 1413 wiphy_unlock(hw->wiphy); 1414 rtnl_unlock(); 1415 1416 #ifdef CONFIG_INET 1417 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1418 result = register_inetaddr_notifier(&local->ifa_notifier); 1419 if (result) 1420 goto fail_ifa; 1421 #endif 1422 1423 #if IS_ENABLED(CONFIG_IPV6) 1424 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1425 result = register_inet6addr_notifier(&local->ifa6_notifier); 1426 if (result) 1427 goto fail_ifa6; 1428 #endif 1429 1430 return 0; 1431 1432 #if IS_ENABLED(CONFIG_IPV6) 1433 fail_ifa6: 1434 #ifdef CONFIG_INET 1435 unregister_inetaddr_notifier(&local->ifa_notifier); 1436 #endif 1437 #endif 1438 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1439 fail_ifa: 1440 #endif 1441 wiphy_unregister(local->hw.wiphy); 1442 fail_wiphy_register: 1443 rtnl_lock(); 1444 rate_control_deinitialize(local); 1445 ieee80211_remove_interfaces(local); 1446 rtnl_unlock(); 1447 fail_rate: 1448 fail_flows: 1449 ieee80211_led_exit(local); 1450 destroy_workqueue(local->workqueue); 1451 fail_workqueue: 1452 if (local->wiphy_ciphers_allocated) { 1453 kfree(local->hw.wiphy->cipher_suites); 1454 local->wiphy_ciphers_allocated = false; 1455 } 1456 kfree(local->int_scan_req); 1457 return result; 1458 } 1459 EXPORT_SYMBOL(ieee80211_register_hw); 1460 1461 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1462 { 1463 struct ieee80211_local *local = hw_to_local(hw); 1464 1465 tasklet_kill(&local->tx_pending_tasklet); 1466 tasklet_kill(&local->tasklet); 1467 1468 #ifdef CONFIG_INET 1469 unregister_inetaddr_notifier(&local->ifa_notifier); 1470 #endif 1471 #if IS_ENABLED(CONFIG_IPV6) 1472 unregister_inet6addr_notifier(&local->ifa6_notifier); 1473 #endif 1474 1475 rtnl_lock(); 1476 1477 /* 1478 * At this point, interface list manipulations are fine 1479 * because the driver cannot be handing us frames any 1480 * more and the tasklet is killed. 1481 */ 1482 ieee80211_remove_interfaces(local); 1483 1484 rtnl_unlock(); 1485 1486 cancel_delayed_work_sync(&local->roc_work); 1487 cancel_work_sync(&local->restart_work); 1488 cancel_work_sync(&local->reconfig_filter); 1489 flush_work(&local->sched_scan_stopped_work); 1490 flush_work(&local->radar_detected_work); 1491 1492 ieee80211_clear_tx_pending(local); 1493 rate_control_deinitialize(local); 1494 1495 if (skb_queue_len(&local->skb_queue) || 1496 skb_queue_len(&local->skb_queue_unreliable)) 1497 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1498 skb_queue_purge(&local->skb_queue); 1499 skb_queue_purge(&local->skb_queue_unreliable); 1500 1501 wiphy_unregister(local->hw.wiphy); 1502 destroy_workqueue(local->workqueue); 1503 ieee80211_led_exit(local); 1504 kfree(local->int_scan_req); 1505 } 1506 EXPORT_SYMBOL(ieee80211_unregister_hw); 1507 1508 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1509 { 1510 WARN_ONCE(1, "Have pending ack frames!\n"); 1511 kfree_skb(p); 1512 return 0; 1513 } 1514 1515 void ieee80211_free_hw(struct ieee80211_hw *hw) 1516 { 1517 struct ieee80211_local *local = hw_to_local(hw); 1518 enum nl80211_band band; 1519 1520 mutex_destroy(&local->iflist_mtx); 1521 mutex_destroy(&local->mtx); 1522 1523 if (local->wiphy_ciphers_allocated) { 1524 kfree(local->hw.wiphy->cipher_suites); 1525 local->wiphy_ciphers_allocated = false; 1526 } 1527 1528 idr_for_each(&local->ack_status_frames, 1529 ieee80211_free_ack_frame, NULL); 1530 idr_destroy(&local->ack_status_frames); 1531 1532 sta_info_stop(local); 1533 1534 ieee80211_free_led_names(local); 1535 1536 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1537 if (!(local->sband_allocated & BIT(band))) 1538 continue; 1539 kfree(local->hw.wiphy->bands[band]); 1540 } 1541 1542 wiphy_free(local->hw.wiphy); 1543 } 1544 EXPORT_SYMBOL(ieee80211_free_hw); 1545 1546 static const char * const drop_reasons_monitor[] = { 1547 #define V(x) #x, 1548 [0] = "RX_DROP_MONITOR", 1549 MAC80211_DROP_REASONS_MONITOR(V) 1550 }; 1551 1552 static struct drop_reason_list drop_reason_list_monitor = { 1553 .reasons = drop_reasons_monitor, 1554 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1555 }; 1556 1557 static const char * const drop_reasons_unusable[] = { 1558 [0] = "RX_DROP_UNUSABLE", 1559 MAC80211_DROP_REASONS_UNUSABLE(V) 1560 #undef V 1561 }; 1562 1563 static struct drop_reason_list drop_reason_list_unusable = { 1564 .reasons = drop_reasons_unusable, 1565 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1566 }; 1567 1568 static int __init ieee80211_init(void) 1569 { 1570 struct sk_buff *skb; 1571 int ret; 1572 1573 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1574 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1575 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1576 1577 ret = rc80211_minstrel_init(); 1578 if (ret) 1579 return ret; 1580 1581 ret = ieee80211_iface_init(); 1582 if (ret) 1583 goto err_netdev; 1584 1585 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1586 &drop_reason_list_monitor); 1587 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1588 &drop_reason_list_unusable); 1589 1590 return 0; 1591 err_netdev: 1592 rc80211_minstrel_exit(); 1593 1594 return ret; 1595 } 1596 1597 static void __exit ieee80211_exit(void) 1598 { 1599 rc80211_minstrel_exit(); 1600 1601 ieee80211s_stop(); 1602 1603 ieee80211_iface_exit(); 1604 1605 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1606 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1607 1608 rcu_barrier(); 1609 } 1610 1611 1612 subsys_initcall(ieee80211_init); 1613 module_exit(ieee80211_exit); 1614 1615 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1616 MODULE_LICENSE("GPL"); 1617