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) 2018-2021 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 if (local->rx_mcast_action_reg) 68 new_flags |= FIF_MCAST_ACTION; 69 70 spin_lock_bh(&local->filter_lock); 71 changed_flags = local->filter_flags ^ new_flags; 72 73 mc = drv_prepare_multicast(local, &local->mc_list); 74 spin_unlock_bh(&local->filter_lock); 75 76 /* be a bit nasty */ 77 new_flags |= (1<<31); 78 79 drv_configure_filter(local, changed_flags, &new_flags, mc); 80 81 WARN_ON(new_flags & (1<<31)); 82 83 local->filter_flags = new_flags & ~(1<<31); 84 } 85 86 static void ieee80211_reconfig_filter(struct work_struct *work) 87 { 88 struct ieee80211_local *local = 89 container_of(work, struct ieee80211_local, reconfig_filter); 90 91 ieee80211_configure_filter(local); 92 } 93 94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 95 { 96 struct ieee80211_sub_if_data *sdata; 97 struct cfg80211_chan_def chandef = {}; 98 u32 changed = 0; 99 int power; 100 u32 offchannel_flag; 101 102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 103 104 if (local->scan_chandef.chan) { 105 chandef = local->scan_chandef; 106 } else if (local->tmp_channel) { 107 chandef.chan = local->tmp_channel; 108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 109 chandef.center_freq1 = chandef.chan->center_freq; 110 chandef.freq1_offset = chandef.chan->freq_offset; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 116 chandef.chan->center_freq, chandef.chan->freq_offset, 117 chandef.width, chandef.center_freq1, chandef.freq1_offset, 118 chandef.center_freq2); 119 120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 122 else 123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 124 125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 126 127 if (offchannel_flag || 128 !cfg80211_chandef_identical(&local->hw.conf.chandef, 129 &local->_oper_chandef)) { 130 local->hw.conf.chandef = chandef; 131 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 132 } 133 134 if (!conf_is_ht(&local->hw.conf)) { 135 /* 136 * mac80211.h documents that this is only valid 137 * when the channel is set to an HT type, and 138 * that otherwise STATIC is used. 139 */ 140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 141 } else if (local->hw.conf.smps_mode != local->smps_mode) { 142 local->hw.conf.smps_mode = local->smps_mode; 143 changed |= IEEE80211_CONF_CHANGE_SMPS; 144 } 145 146 power = ieee80211_chandef_max_power(&chandef); 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 150 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 151 continue; 152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 153 continue; 154 if (sdata->vif.bss_conf.txpower == INT_MIN) 155 continue; 156 power = min(power, sdata->vif.bss_conf.txpower); 157 } 158 rcu_read_unlock(); 159 160 if (local->hw.conf.power_level != power) { 161 changed |= IEEE80211_CONF_CHANGE_POWER; 162 local->hw.conf.power_level = power; 163 } 164 165 return changed; 166 } 167 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 169 { 170 int ret = 0; 171 172 might_sleep(); 173 174 if (!local->use_chanctx) 175 changed |= ieee80211_hw_conf_chan(local); 176 else 177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 178 IEEE80211_CONF_CHANGE_POWER); 179 180 if (changed && local->open_count) { 181 ret = drv_config(local, changed); 182 /* 183 * Goal: 184 * HW reconfiguration should never fail, the driver has told 185 * us what it can support so it should live up to that promise. 186 * 187 * Current status: 188 * rfkill is not integrated with mac80211 and a 189 * configuration command can thus fail if hardware rfkill 190 * is enabled 191 * 192 * FIXME: integrate rfkill with mac80211 and then add this 193 * WARN_ON() back 194 * 195 */ 196 /* WARN_ON(ret); */ 197 } 198 199 return ret; 200 } 201 202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 203 u32 changed) 204 { 205 struct ieee80211_local *local = sdata->local; 206 207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 208 return; 209 210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 211 } 212 213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 214 { 215 sdata->vif.bss_conf.use_cts_prot = false; 216 sdata->vif.bss_conf.use_short_preamble = false; 217 sdata->vif.bss_conf.use_short_slot = false; 218 return BSS_CHANGED_ERP_CTS_PROT | 219 BSS_CHANGED_ERP_PREAMBLE | 220 BSS_CHANGED_ERP_SLOT; 221 } 222 223 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 224 { 225 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 226 struct sk_buff *skb; 227 228 while ((skb = skb_dequeue(&local->skb_queue)) || 229 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 230 switch (skb->pkt_type) { 231 case IEEE80211_RX_MSG: 232 /* Clear skb->pkt_type in order to not confuse kernel 233 * netstack. */ 234 skb->pkt_type = 0; 235 ieee80211_rx(&local->hw, skb); 236 break; 237 case IEEE80211_TX_STATUS_MSG: 238 skb->pkt_type = 0; 239 ieee80211_tx_status(&local->hw, skb); 240 break; 241 default: 242 WARN(1, "mac80211: Packet is of unknown type %d\n", 243 skb->pkt_type); 244 dev_kfree_skb(skb); 245 break; 246 } 247 } 248 } 249 250 static void ieee80211_restart_work(struct work_struct *work) 251 { 252 struct ieee80211_local *local = 253 container_of(work, struct ieee80211_local, restart_work); 254 struct ieee80211_sub_if_data *sdata; 255 int ret; 256 257 /* wait for scan work complete */ 258 flush_workqueue(local->workqueue); 259 flush_work(&local->sched_scan_stopped_work); 260 flush_work(&local->radar_detected_work); 261 262 rtnl_lock(); 263 264 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 265 "%s called with hardware scan in progress\n", __func__); 266 267 list_for_each_entry(sdata, &local->interfaces, list) { 268 /* 269 * XXX: there may be more work for other vif types and even 270 * for station mode: a good thing would be to run most of 271 * the iface type's dependent _stop (ieee80211_mg_stop, 272 * ieee80211_ibss_stop) etc... 273 * For now, fix only the specific bug that was seen: race 274 * between csa_connection_drop_work and us. 275 */ 276 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 277 /* 278 * This worker is scheduled from the iface worker that 279 * runs on mac80211's workqueue, so we can't be 280 * scheduling this worker after the cancel right here. 281 * The exception is ieee80211_chswitch_done. 282 * Then we can have a race... 283 */ 284 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 285 if (sdata->vif.csa_active) { 286 sdata_lock(sdata); 287 ieee80211_sta_connection_lost(sdata, 288 sdata->u.mgd.associated->bssid, 289 WLAN_REASON_UNSPECIFIED, false); 290 sdata_unlock(sdata); 291 } 292 } 293 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 294 } 295 ieee80211_scan_cancel(local); 296 297 /* make sure any new ROC will consider local->in_reconfig */ 298 flush_delayed_work(&local->roc_work); 299 flush_work(&local->hw_roc_done); 300 301 /* wait for all packet processing to be done */ 302 synchronize_net(); 303 304 ret = ieee80211_reconfig(local); 305 wiphy_unlock(local->hw.wiphy); 306 307 if (ret) 308 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 309 310 rtnl_unlock(); 311 } 312 313 void ieee80211_restart_hw(struct ieee80211_hw *hw) 314 { 315 struct ieee80211_local *local = hw_to_local(hw); 316 317 trace_api_restart_hw(local); 318 319 wiphy_info(hw->wiphy, 320 "Hardware restart was requested\n"); 321 322 /* use this reason, ieee80211_reconfig will unblock it */ 323 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 324 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 325 false); 326 327 /* 328 * Stop all Rx during the reconfig. We don't want state changes 329 * or driver callbacks while this is in progress. 330 */ 331 local->in_reconfig = true; 332 barrier(); 333 334 queue_work(system_freezable_wq, &local->restart_work); 335 } 336 EXPORT_SYMBOL(ieee80211_restart_hw); 337 338 #ifdef CONFIG_INET 339 static int ieee80211_ifa_changed(struct notifier_block *nb, 340 unsigned long data, void *arg) 341 { 342 struct in_ifaddr *ifa = arg; 343 struct ieee80211_local *local = 344 container_of(nb, struct ieee80211_local, 345 ifa_notifier); 346 struct net_device *ndev = ifa->ifa_dev->dev; 347 struct wireless_dev *wdev = ndev->ieee80211_ptr; 348 struct in_device *idev; 349 struct ieee80211_sub_if_data *sdata; 350 struct ieee80211_bss_conf *bss_conf; 351 struct ieee80211_if_managed *ifmgd; 352 int c = 0; 353 354 /* Make sure it's our interface that got changed */ 355 if (!wdev) 356 return NOTIFY_DONE; 357 358 if (wdev->wiphy != local->hw.wiphy) 359 return NOTIFY_DONE; 360 361 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 362 bss_conf = &sdata->vif.bss_conf; 363 364 /* ARP filtering is only supported in managed mode */ 365 if (sdata->vif.type != NL80211_IFTYPE_STATION) 366 return NOTIFY_DONE; 367 368 idev = __in_dev_get_rtnl(sdata->dev); 369 if (!idev) 370 return NOTIFY_DONE; 371 372 ifmgd = &sdata->u.mgd; 373 sdata_lock(sdata); 374 375 /* Copy the addresses to the bss_conf list */ 376 ifa = rtnl_dereference(idev->ifa_list); 377 while (ifa) { 378 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 379 bss_conf->arp_addr_list[c] = ifa->ifa_address; 380 ifa = rtnl_dereference(ifa->ifa_next); 381 c++; 382 } 383 384 bss_conf->arp_addr_cnt = c; 385 386 /* Configure driver only if associated (which also implies it is up) */ 387 if (ifmgd->associated) 388 ieee80211_bss_info_change_notify(sdata, 389 BSS_CHANGED_ARP_FILTER); 390 391 sdata_unlock(sdata); 392 393 return NOTIFY_OK; 394 } 395 #endif 396 397 #if IS_ENABLED(CONFIG_IPV6) 398 static int ieee80211_ifa6_changed(struct notifier_block *nb, 399 unsigned long data, void *arg) 400 { 401 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 402 struct inet6_dev *idev = ifa->idev; 403 struct net_device *ndev = ifa->idev->dev; 404 struct ieee80211_local *local = 405 container_of(nb, struct ieee80211_local, ifa6_notifier); 406 struct wireless_dev *wdev = ndev->ieee80211_ptr; 407 struct ieee80211_sub_if_data *sdata; 408 409 /* Make sure it's our interface that got changed */ 410 if (!wdev || wdev->wiphy != local->hw.wiphy) 411 return NOTIFY_DONE; 412 413 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 414 415 /* 416 * For now only support station mode. This is mostly because 417 * doing AP would have to handle AP_VLAN in some way ... 418 */ 419 if (sdata->vif.type != NL80211_IFTYPE_STATION) 420 return NOTIFY_DONE; 421 422 drv_ipv6_addr_change(local, sdata, idev); 423 424 return NOTIFY_OK; 425 } 426 #endif 427 428 /* There isn't a lot of sense in it, but you can transmit anything you like */ 429 static const struct ieee80211_txrx_stypes 430 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 431 [NL80211_IFTYPE_ADHOC] = { 432 .tx = 0xffff, 433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 434 BIT(IEEE80211_STYPE_AUTH >> 4) | 435 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 436 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 437 }, 438 [NL80211_IFTYPE_STATION] = { 439 .tx = 0xffff, 440 /* 441 * To support Pre Association Security Negotiation (PASN) while 442 * already associated to one AP, allow user space to register to 443 * Rx authentication frames, so that the user space logic would 444 * be able to receive/handle authentication frames from a 445 * different AP as part of PASN. 446 * It is expected that user space would intelligently register 447 * for Rx authentication frames, i.e., only when PASN is used 448 * and configure a match filter only for PASN authentication 449 * algorithm, as otherwise the MLME functionality of mac80211 450 * would be broken. 451 */ 452 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 453 BIT(IEEE80211_STYPE_AUTH >> 4) | 454 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 455 }, 456 [NL80211_IFTYPE_AP] = { 457 .tx = 0xffff, 458 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 459 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 460 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 461 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 462 BIT(IEEE80211_STYPE_AUTH >> 4) | 463 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 464 BIT(IEEE80211_STYPE_ACTION >> 4), 465 }, 466 [NL80211_IFTYPE_AP_VLAN] = { 467 /* copy AP */ 468 .tx = 0xffff, 469 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 470 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 472 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 473 BIT(IEEE80211_STYPE_AUTH >> 4) | 474 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 475 BIT(IEEE80211_STYPE_ACTION >> 4), 476 }, 477 [NL80211_IFTYPE_P2P_CLIENT] = { 478 .tx = 0xffff, 479 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 480 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 481 }, 482 [NL80211_IFTYPE_P2P_GO] = { 483 .tx = 0xffff, 484 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 485 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 486 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 487 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 488 BIT(IEEE80211_STYPE_AUTH >> 4) | 489 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 490 BIT(IEEE80211_STYPE_ACTION >> 4), 491 }, 492 [NL80211_IFTYPE_MESH_POINT] = { 493 .tx = 0xffff, 494 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 495 BIT(IEEE80211_STYPE_AUTH >> 4) | 496 BIT(IEEE80211_STYPE_DEAUTH >> 4), 497 }, 498 [NL80211_IFTYPE_P2P_DEVICE] = { 499 .tx = 0xffff, 500 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 501 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 502 }, 503 }; 504 505 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 506 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 507 IEEE80211_HT_AMPDU_PARM_DENSITY, 508 509 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 510 IEEE80211_HT_CAP_MAX_AMSDU | 511 IEEE80211_HT_CAP_SGI_20 | 512 IEEE80211_HT_CAP_SGI_40 | 513 IEEE80211_HT_CAP_TX_STBC | 514 IEEE80211_HT_CAP_RX_STBC | 515 IEEE80211_HT_CAP_LDPC_CODING | 516 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 517 .mcs = { 518 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 519 0xff, 0xff, 0xff, 0xff, 0xff, }, 520 }, 521 }; 522 523 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 524 .vht_cap_info = 525 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 526 IEEE80211_VHT_CAP_SHORT_GI_80 | 527 IEEE80211_VHT_CAP_SHORT_GI_160 | 528 IEEE80211_VHT_CAP_RXSTBC_MASK | 529 IEEE80211_VHT_CAP_TXSTBC | 530 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 531 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 532 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 533 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 534 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 535 .supp_mcs = { 536 .rx_mcs_map = cpu_to_le16(~0), 537 .tx_mcs_map = cpu_to_le16(~0), 538 }, 539 }; 540 541 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 542 const struct ieee80211_ops *ops, 543 const char *requested_name) 544 { 545 struct ieee80211_local *local; 546 int priv_size, i; 547 struct wiphy *wiphy; 548 bool use_chanctx; 549 550 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 551 !ops->add_interface || !ops->remove_interface || 552 !ops->configure_filter)) 553 return NULL; 554 555 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 556 return NULL; 557 558 /* check all or no channel context operations exist */ 559 i = !!ops->add_chanctx + !!ops->remove_chanctx + 560 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 561 !!ops->unassign_vif_chanctx; 562 if (WARN_ON(i != 0 && i != 5)) 563 return NULL; 564 use_chanctx = i == 5; 565 566 /* Ensure 32-byte alignment of our private data and hw private data. 567 * We use the wiphy priv data for both our ieee80211_local and for 568 * the driver's private data 569 * 570 * In memory it'll be like this: 571 * 572 * +-------------------------+ 573 * | struct wiphy | 574 * +-------------------------+ 575 * | struct ieee80211_local | 576 * +-------------------------+ 577 * | driver's private data | 578 * +-------------------------+ 579 * 580 */ 581 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 582 583 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 584 585 if (!wiphy) 586 return NULL; 587 588 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 589 590 wiphy->privid = mac80211_wiphy_privid; 591 592 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 593 WIPHY_FLAG_4ADDR_AP | 594 WIPHY_FLAG_4ADDR_STATION | 595 WIPHY_FLAG_REPORTS_OBSS | 596 WIPHY_FLAG_OFFCHAN_TX; 597 598 if (!use_chanctx || ops->remain_on_channel) 599 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 600 601 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 602 NL80211_FEATURE_SAE | 603 NL80211_FEATURE_HT_IBSS | 604 NL80211_FEATURE_VIF_TXPOWER | 605 NL80211_FEATURE_MAC_ON_CREATE | 606 NL80211_FEATURE_USERSPACE_MPM | 607 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 608 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 609 wiphy_ext_feature_set(wiphy, 610 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 611 wiphy_ext_feature_set(wiphy, 612 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 613 wiphy_ext_feature_set(wiphy, 614 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 615 wiphy_ext_feature_set(wiphy, 616 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 617 618 if (!ops->hw_scan) { 619 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 620 NL80211_FEATURE_AP_SCAN; 621 /* 622 * if the driver behaves correctly using the probe request 623 * (template) from mac80211, then both of these should be 624 * supported even with hw scan - but let drivers opt in. 625 */ 626 wiphy_ext_feature_set(wiphy, 627 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 628 wiphy_ext_feature_set(wiphy, 629 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 630 } 631 632 if (!ops->set_key) 633 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 634 635 if (ops->wake_tx_queue) 636 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 637 638 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 639 640 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 641 642 local = wiphy_priv(wiphy); 643 644 if (sta_info_init(local)) 645 goto err_free; 646 647 local->hw.wiphy = wiphy; 648 649 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 650 651 local->ops = ops; 652 local->use_chanctx = use_chanctx; 653 654 /* 655 * We need a bit of data queued to build aggregates properly, so 656 * instruct the TCP stack to allow more than a single ms of data 657 * to be queued in the stack. The value is a bit-shift of 1 658 * second, so 7 is ~8ms of queued data. Only affects local TCP 659 * sockets. 660 * This is the default, anyhow - drivers may need to override it 661 * for local reasons (longer buffers, longer completion time, or 662 * similar). 663 */ 664 local->hw.tx_sk_pacing_shift = 7; 665 666 /* set up some defaults */ 667 local->hw.queues = 1; 668 local->hw.max_rates = 1; 669 local->hw.max_report_rates = 0; 670 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 671 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 672 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 673 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 674 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 675 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 676 IEEE80211_RADIOTAP_MCS_HAVE_GI | 677 IEEE80211_RADIOTAP_MCS_HAVE_BW; 678 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 679 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 680 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 681 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 682 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 683 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 684 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 685 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 686 687 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 688 689 wiphy->extended_capabilities = local->ext_capa; 690 wiphy->extended_capabilities_mask = local->ext_capa; 691 wiphy->extended_capabilities_len = 692 ARRAY_SIZE(local->ext_capa); 693 694 INIT_LIST_HEAD(&local->interfaces); 695 INIT_LIST_HEAD(&local->mon_list); 696 697 __hw_addr_init(&local->mc_list); 698 699 mutex_init(&local->iflist_mtx); 700 mutex_init(&local->mtx); 701 702 mutex_init(&local->key_mtx); 703 spin_lock_init(&local->filter_lock); 704 spin_lock_init(&local->rx_path_lock); 705 spin_lock_init(&local->queue_stop_reason_lock); 706 707 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 708 struct airtime_sched_info *air_sched = &local->airtime[i]; 709 710 air_sched->active_txqs = RB_ROOT_CACHED; 711 INIT_LIST_HEAD(&air_sched->active_list); 712 spin_lock_init(&air_sched->lock); 713 air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 714 air_sched->aql_txq_limit_high = 715 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 716 } 717 718 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 719 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 720 atomic_set(&local->aql_total_pending_airtime, 0); 721 722 INIT_LIST_HEAD(&local->chanctx_list); 723 mutex_init(&local->chanctx_mtx); 724 725 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 726 727 INIT_WORK(&local->restart_work, ieee80211_restart_work); 728 729 INIT_WORK(&local->radar_detected_work, 730 ieee80211_dfs_radar_detected_work); 731 732 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 733 local->smps_mode = IEEE80211_SMPS_OFF; 734 735 INIT_WORK(&local->dynamic_ps_enable_work, 736 ieee80211_dynamic_ps_enable_work); 737 INIT_WORK(&local->dynamic_ps_disable_work, 738 ieee80211_dynamic_ps_disable_work); 739 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 740 741 INIT_WORK(&local->sched_scan_stopped_work, 742 ieee80211_sched_scan_stopped_work); 743 744 spin_lock_init(&local->ack_status_lock); 745 idr_init(&local->ack_status_frames); 746 747 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 748 skb_queue_head_init(&local->pending[i]); 749 atomic_set(&local->agg_queue_stop[i], 0); 750 } 751 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 752 753 if (ops->wake_tx_queue) 754 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 755 756 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 757 758 skb_queue_head_init(&local->skb_queue); 759 skb_queue_head_init(&local->skb_queue_unreliable); 760 761 ieee80211_alloc_led_names(local); 762 763 ieee80211_roc_setup(local); 764 765 local->hw.radiotap_timestamp.units_pos = -1; 766 local->hw.radiotap_timestamp.accuracy = -1; 767 768 return &local->hw; 769 err_free: 770 wiphy_free(wiphy); 771 return NULL; 772 } 773 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 774 775 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 776 { 777 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 778 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 779 int n_suites = 0, r = 0, w = 0; 780 u32 *suites; 781 static const u32 cipher_suites[] = { 782 /* keep WEP first, it may be removed below */ 783 WLAN_CIPHER_SUITE_WEP40, 784 WLAN_CIPHER_SUITE_WEP104, 785 WLAN_CIPHER_SUITE_TKIP, 786 WLAN_CIPHER_SUITE_CCMP, 787 WLAN_CIPHER_SUITE_CCMP_256, 788 WLAN_CIPHER_SUITE_GCMP, 789 WLAN_CIPHER_SUITE_GCMP_256, 790 791 /* keep last -- depends on hw flags! */ 792 WLAN_CIPHER_SUITE_AES_CMAC, 793 WLAN_CIPHER_SUITE_BIP_CMAC_256, 794 WLAN_CIPHER_SUITE_BIP_GMAC_128, 795 WLAN_CIPHER_SUITE_BIP_GMAC_256, 796 }; 797 798 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 799 local->hw.wiphy->cipher_suites) { 800 /* If the driver advertises, or doesn't support SW crypto, 801 * we only need to remove WEP if necessary. 802 */ 803 if (have_wep) 804 return 0; 805 806 /* well if it has _no_ ciphers ... fine */ 807 if (!local->hw.wiphy->n_cipher_suites) 808 return 0; 809 810 /* Driver provides cipher suites, but we need to exclude WEP */ 811 suites = kmemdup(local->hw.wiphy->cipher_suites, 812 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 813 GFP_KERNEL); 814 if (!suites) 815 return -ENOMEM; 816 817 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 818 u32 suite = local->hw.wiphy->cipher_suites[r]; 819 820 if (suite == WLAN_CIPHER_SUITE_WEP40 || 821 suite == WLAN_CIPHER_SUITE_WEP104) 822 continue; 823 suites[w++] = suite; 824 } 825 } else if (!local->hw.cipher_schemes) { 826 /* If the driver doesn't have cipher schemes, there's nothing 827 * else to do other than assign the (software supported and 828 * perhaps offloaded) cipher suites. 829 */ 830 local->hw.wiphy->cipher_suites = cipher_suites; 831 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 832 833 if (!have_mfp) 834 local->hw.wiphy->n_cipher_suites -= 4; 835 836 if (!have_wep) { 837 local->hw.wiphy->cipher_suites += 2; 838 local->hw.wiphy->n_cipher_suites -= 2; 839 } 840 841 /* not dynamically allocated, so just return */ 842 return 0; 843 } else { 844 const struct ieee80211_cipher_scheme *cs; 845 846 cs = local->hw.cipher_schemes; 847 848 /* Driver specifies cipher schemes only (but not cipher suites 849 * including the schemes) 850 * 851 * We start counting ciphers defined by schemes, TKIP, CCMP, 852 * CCMP-256, GCMP, and GCMP-256 853 */ 854 n_suites = local->hw.n_cipher_schemes + 5; 855 856 /* check if we have WEP40 and WEP104 */ 857 if (have_wep) 858 n_suites += 2; 859 860 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 861 * BIP-GMAC-256 862 */ 863 if (have_mfp) 864 n_suites += 4; 865 866 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 867 if (!suites) 868 return -ENOMEM; 869 870 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 871 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 872 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 873 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 874 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 875 876 if (have_wep) { 877 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 878 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 879 } 880 881 if (have_mfp) { 882 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 883 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 884 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 885 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 886 } 887 888 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 889 suites[w++] = cs[r].cipher; 890 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 891 kfree(suites); 892 return -EINVAL; 893 } 894 } 895 } 896 897 local->hw.wiphy->cipher_suites = suites; 898 local->hw.wiphy->n_cipher_suites = w; 899 local->wiphy_ciphers_allocated = true; 900 901 return 0; 902 } 903 904 int ieee80211_register_hw(struct ieee80211_hw *hw) 905 { 906 struct ieee80211_local *local = hw_to_local(hw); 907 int result, i; 908 enum nl80211_band band; 909 int channels, max_bitrates; 910 bool supp_ht, supp_vht, supp_he; 911 struct cfg80211_chan_def dflt_chandef = {}; 912 913 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 914 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 915 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 916 return -EINVAL; 917 918 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 919 (!local->ops->tdls_channel_switch || 920 !local->ops->tdls_cancel_channel_switch || 921 !local->ops->tdls_recv_channel_switch)) 922 return -EOPNOTSUPP; 923 924 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 925 !local->ops->set_frag_threshold)) 926 return -EINVAL; 927 928 if (WARN_ON(local->hw.wiphy->interface_modes & 929 BIT(NL80211_IFTYPE_NAN) && 930 (!local->ops->start_nan || !local->ops->stop_nan))) 931 return -EINVAL; 932 933 #ifdef CONFIG_PM 934 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 935 return -EINVAL; 936 #endif 937 938 if (!local->use_chanctx) { 939 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 940 const struct ieee80211_iface_combination *comb; 941 942 comb = &local->hw.wiphy->iface_combinations[i]; 943 944 if (comb->num_different_channels > 1) 945 return -EINVAL; 946 } 947 } else { 948 /* DFS is not supported with multi-channel combinations yet */ 949 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 950 const struct ieee80211_iface_combination *comb; 951 952 comb = &local->hw.wiphy->iface_combinations[i]; 953 954 if (comb->radar_detect_widths && 955 comb->num_different_channels > 1) 956 return -EINVAL; 957 } 958 } 959 960 /* Only HW csum features are currently compatible with mac80211 */ 961 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 962 return -EINVAL; 963 964 if (hw->max_report_rates == 0) 965 hw->max_report_rates = hw->max_rates; 966 967 local->rx_chains = 1; 968 969 /* 970 * generic code guarantees at least one band, 971 * set this very early because much code assumes 972 * that hw.conf.channel is assigned 973 */ 974 channels = 0; 975 max_bitrates = 0; 976 supp_ht = false; 977 supp_vht = false; 978 supp_he = false; 979 for (band = 0; band < NUM_NL80211_BANDS; band++) { 980 struct ieee80211_supported_band *sband; 981 982 sband = local->hw.wiphy->bands[band]; 983 if (!sband) 984 continue; 985 986 if (!dflt_chandef.chan) { 987 /* 988 * Assign the first enabled channel to dflt_chandef 989 * from the list of channels 990 */ 991 for (i = 0; i < sband->n_channels; i++) 992 if (!(sband->channels[i].flags & 993 IEEE80211_CHAN_DISABLED)) 994 break; 995 /* if none found then use the first anyway */ 996 if (i == sband->n_channels) 997 i = 0; 998 cfg80211_chandef_create(&dflt_chandef, 999 &sband->channels[i], 1000 NL80211_CHAN_NO_HT); 1001 /* init channel we're on */ 1002 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1003 local->hw.conf.chandef = dflt_chandef; 1004 local->_oper_chandef = dflt_chandef; 1005 } 1006 local->monitor_chandef = dflt_chandef; 1007 } 1008 1009 channels += sband->n_channels; 1010 1011 if (max_bitrates < sband->n_bitrates) 1012 max_bitrates = sband->n_bitrates; 1013 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1014 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1015 1016 for (i = 0; i < sband->n_iftype_data; i++) { 1017 const struct ieee80211_sband_iftype_data *iftd; 1018 1019 iftd = &sband->iftype_data[i]; 1020 1021 supp_he = supp_he || (iftd && iftd->he_cap.has_he); 1022 } 1023 1024 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1025 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1026 (supp_ht || supp_vht || supp_he))) 1027 return -EINVAL; 1028 1029 if (!sband->ht_cap.ht_supported) 1030 continue; 1031 1032 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1033 local->rx_chains = 1034 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1035 local->rx_chains); 1036 1037 /* no need to mask, SM_PS_DISABLED has all bits set */ 1038 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1039 IEEE80211_HT_CAP_SM_PS_SHIFT; 1040 } 1041 1042 /* if low-level driver supports AP, we also support VLAN. 1043 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1044 * based on their support to transmit SW encrypted packets. 1045 */ 1046 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1047 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1048 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1049 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1050 } 1051 1052 /* mac80211 always supports monitor */ 1053 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1054 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1055 1056 /* mac80211 doesn't support more than one IBSS interface right now */ 1057 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1058 const struct ieee80211_iface_combination *c; 1059 int j; 1060 1061 c = &hw->wiphy->iface_combinations[i]; 1062 1063 for (j = 0; j < c->n_limits; j++) 1064 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1065 c->limits[j].max > 1) 1066 return -EINVAL; 1067 } 1068 1069 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1070 sizeof(void *) * channels, GFP_KERNEL); 1071 if (!local->int_scan_req) 1072 return -ENOMEM; 1073 1074 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1075 if (!local->hw.wiphy->bands[band]) 1076 continue; 1077 local->int_scan_req->rates[band] = (u32) -1; 1078 } 1079 1080 #ifndef CONFIG_MAC80211_MESH 1081 /* mesh depends on Kconfig, but drivers should set it if they want */ 1082 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1083 #endif 1084 1085 /* if the underlying driver supports mesh, mac80211 will (at least) 1086 * provide routing of mesh authentication frames to userspace */ 1087 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1088 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1089 1090 /* mac80211 supports control port protocol changing */ 1091 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1092 1093 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1094 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1095 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1096 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1097 if (hw->max_signal <= 0) { 1098 result = -EINVAL; 1099 goto fail_workqueue; 1100 } 1101 } 1102 1103 /* Mac80211 and therefore all drivers using SW crypto only 1104 * are able to handle PTK rekeys and Extended Key ID. 1105 */ 1106 if (!local->ops->set_key) { 1107 wiphy_ext_feature_set(local->hw.wiphy, 1108 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1109 wiphy_ext_feature_set(local->hw.wiphy, 1110 NL80211_EXT_FEATURE_EXT_KEY_ID); 1111 } 1112 1113 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1114 wiphy_ext_feature_set(local->hw.wiphy, 1115 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1116 1117 /* 1118 * Calculate scan IE length -- we need this to alloc 1119 * memory and to subtract from the driver limit. It 1120 * includes the DS Params, (extended) supported rates, and HT 1121 * information -- SSID is the driver's responsibility. 1122 */ 1123 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1124 3 /* DS Params */; 1125 if (supp_ht) 1126 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1127 1128 if (supp_vht) 1129 local->scan_ies_len += 1130 2 + sizeof(struct ieee80211_vht_cap); 1131 1132 /* HE cap element is variable in size - set len to allow max size */ 1133 /* 1134 * TODO: 1 is added at the end of the calculation to accommodate for 1135 * the temporary placing of the HE capabilities IE under EXT. 1136 * Remove it once it is placed in the final place. 1137 */ 1138 if (supp_he) 1139 local->scan_ies_len += 1140 2 + sizeof(struct ieee80211_he_cap_elem) + 1141 sizeof(struct ieee80211_he_mcs_nss_supp) + 1142 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1143 1144 if (!local->ops->hw_scan) { 1145 /* For hw_scan, driver needs to set these up. */ 1146 local->hw.wiphy->max_scan_ssids = 4; 1147 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1148 } 1149 1150 /* 1151 * If the driver supports any scan IEs, then assume the 1152 * limit includes the IEs mac80211 will add, otherwise 1153 * leave it at zero and let the driver sort it out; we 1154 * still pass our IEs to the driver but userspace will 1155 * not be allowed to in that case. 1156 */ 1157 if (local->hw.wiphy->max_scan_ie_len) 1158 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1159 1160 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1161 local->hw.n_cipher_schemes))) { 1162 result = -EINVAL; 1163 goto fail_workqueue; 1164 } 1165 1166 result = ieee80211_init_cipher_suites(local); 1167 if (result < 0) 1168 goto fail_workqueue; 1169 1170 if (!local->ops->remain_on_channel) 1171 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1172 1173 /* mac80211 based drivers don't support internal TDLS setup */ 1174 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1175 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1176 1177 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1178 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1179 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1180 1181 /* mac80211 supports multi BSSID, if the driver supports it */ 1182 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1183 local->hw.wiphy->support_mbssid = true; 1184 if (ieee80211_hw_check(&local->hw, 1185 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1186 local->hw.wiphy->support_only_he_mbssid = true; 1187 else 1188 local->ext_capa[2] |= 1189 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1190 } 1191 1192 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1193 1194 /* 1195 * We use the number of queues for feature tests (QoS, HT) internally 1196 * so restrict them appropriately. 1197 */ 1198 if (hw->queues > IEEE80211_MAX_QUEUES) 1199 hw->queues = IEEE80211_MAX_QUEUES; 1200 1201 local->workqueue = 1202 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1203 if (!local->workqueue) { 1204 result = -ENOMEM; 1205 goto fail_workqueue; 1206 } 1207 1208 /* 1209 * The hardware needs headroom for sending the frame, 1210 * and we need some headroom for passing the frame to monitor 1211 * interfaces, but never both at the same time. 1212 */ 1213 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1214 IEEE80211_TX_STATUS_HEADROOM); 1215 1216 /* 1217 * if the driver doesn't specify a max listen interval we 1218 * use 5 which should be a safe default 1219 */ 1220 if (local->hw.max_listen_interval == 0) 1221 local->hw.max_listen_interval = 5; 1222 1223 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1224 1225 local->dynamic_ps_forced_timeout = -1; 1226 1227 if (!local->hw.max_nan_de_entries) 1228 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1229 1230 if (!local->hw.weight_multiplier) 1231 local->hw.weight_multiplier = 1; 1232 1233 ieee80211_wep_init(local); 1234 1235 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1236 1237 ieee80211_led_init(local); 1238 1239 result = ieee80211_txq_setup_flows(local); 1240 if (result) 1241 goto fail_flows; 1242 1243 rtnl_lock(); 1244 result = ieee80211_init_rate_ctrl_alg(local, 1245 hw->rate_control_algorithm); 1246 rtnl_unlock(); 1247 if (result < 0) { 1248 wiphy_debug(local->hw.wiphy, 1249 "Failed to initialize rate control algorithm\n"); 1250 goto fail_rate; 1251 } 1252 1253 if (local->rate_ctrl) { 1254 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1255 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1256 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1257 } 1258 1259 /* 1260 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1261 * or have it when we don't, copy the sband structure and set/clear it. 1262 * This is necessary because rate scaling algorithms could be switched 1263 * and have different support values. 1264 * Print a message so that in the common case the reallocation can be 1265 * avoided. 1266 */ 1267 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1268 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1269 struct ieee80211_supported_band *sband; 1270 bool local_cap, ie_cap; 1271 1272 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1273 1274 sband = local->hw.wiphy->bands[band]; 1275 if (!sband || !sband->vht_cap.vht_supported) 1276 continue; 1277 1278 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1279 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1280 1281 if (local_cap == ie_cap) 1282 continue; 1283 1284 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1285 if (!sband) { 1286 result = -ENOMEM; 1287 goto fail_rate; 1288 } 1289 1290 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1291 band); 1292 1293 sband->vht_cap.vht_mcs.tx_highest ^= 1294 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1295 1296 local->hw.wiphy->bands[band] = sband; 1297 local->sband_allocated |= BIT(band); 1298 } 1299 1300 result = wiphy_register(local->hw.wiphy); 1301 if (result < 0) 1302 goto fail_wiphy_register; 1303 1304 debugfs_hw_add(local); 1305 rate_control_add_debugfs(local); 1306 1307 rtnl_lock(); 1308 wiphy_lock(hw->wiphy); 1309 1310 /* add one default STA interface if supported */ 1311 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1312 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1313 struct vif_params params = {0}; 1314 1315 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1316 NL80211_IFTYPE_STATION, ¶ms); 1317 if (result) 1318 wiphy_warn(local->hw.wiphy, 1319 "Failed to add default virtual iface\n"); 1320 } 1321 1322 wiphy_unlock(hw->wiphy); 1323 rtnl_unlock(); 1324 1325 #ifdef CONFIG_INET 1326 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1327 result = register_inetaddr_notifier(&local->ifa_notifier); 1328 if (result) 1329 goto fail_ifa; 1330 #endif 1331 1332 #if IS_ENABLED(CONFIG_IPV6) 1333 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1334 result = register_inet6addr_notifier(&local->ifa6_notifier); 1335 if (result) 1336 goto fail_ifa6; 1337 #endif 1338 1339 return 0; 1340 1341 #if IS_ENABLED(CONFIG_IPV6) 1342 fail_ifa6: 1343 #ifdef CONFIG_INET 1344 unregister_inetaddr_notifier(&local->ifa_notifier); 1345 #endif 1346 #endif 1347 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1348 fail_ifa: 1349 #endif 1350 wiphy_unregister(local->hw.wiphy); 1351 fail_wiphy_register: 1352 rtnl_lock(); 1353 rate_control_deinitialize(local); 1354 ieee80211_remove_interfaces(local); 1355 rtnl_unlock(); 1356 fail_rate: 1357 fail_flows: 1358 ieee80211_led_exit(local); 1359 destroy_workqueue(local->workqueue); 1360 fail_workqueue: 1361 if (local->wiphy_ciphers_allocated) 1362 kfree(local->hw.wiphy->cipher_suites); 1363 kfree(local->int_scan_req); 1364 return result; 1365 } 1366 EXPORT_SYMBOL(ieee80211_register_hw); 1367 1368 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1369 { 1370 struct ieee80211_local *local = hw_to_local(hw); 1371 1372 tasklet_kill(&local->tx_pending_tasklet); 1373 tasklet_kill(&local->tasklet); 1374 1375 #ifdef CONFIG_INET 1376 unregister_inetaddr_notifier(&local->ifa_notifier); 1377 #endif 1378 #if IS_ENABLED(CONFIG_IPV6) 1379 unregister_inet6addr_notifier(&local->ifa6_notifier); 1380 #endif 1381 1382 rtnl_lock(); 1383 1384 /* 1385 * At this point, interface list manipulations are fine 1386 * because the driver cannot be handing us frames any 1387 * more and the tasklet is killed. 1388 */ 1389 ieee80211_remove_interfaces(local); 1390 1391 rtnl_unlock(); 1392 1393 cancel_delayed_work_sync(&local->roc_work); 1394 cancel_work_sync(&local->restart_work); 1395 cancel_work_sync(&local->reconfig_filter); 1396 flush_work(&local->sched_scan_stopped_work); 1397 flush_work(&local->radar_detected_work); 1398 1399 ieee80211_clear_tx_pending(local); 1400 rate_control_deinitialize(local); 1401 1402 if (skb_queue_len(&local->skb_queue) || 1403 skb_queue_len(&local->skb_queue_unreliable)) 1404 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1405 skb_queue_purge(&local->skb_queue); 1406 skb_queue_purge(&local->skb_queue_unreliable); 1407 1408 wiphy_unregister(local->hw.wiphy); 1409 destroy_workqueue(local->workqueue); 1410 ieee80211_led_exit(local); 1411 kfree(local->int_scan_req); 1412 } 1413 EXPORT_SYMBOL(ieee80211_unregister_hw); 1414 1415 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1416 { 1417 WARN_ONCE(1, "Have pending ack frames!\n"); 1418 kfree_skb(p); 1419 return 0; 1420 } 1421 1422 void ieee80211_free_hw(struct ieee80211_hw *hw) 1423 { 1424 struct ieee80211_local *local = hw_to_local(hw); 1425 enum nl80211_band band; 1426 1427 mutex_destroy(&local->iflist_mtx); 1428 mutex_destroy(&local->mtx); 1429 1430 if (local->wiphy_ciphers_allocated) 1431 kfree(local->hw.wiphy->cipher_suites); 1432 1433 idr_for_each(&local->ack_status_frames, 1434 ieee80211_free_ack_frame, NULL); 1435 idr_destroy(&local->ack_status_frames); 1436 1437 sta_info_stop(local); 1438 1439 ieee80211_free_led_names(local); 1440 1441 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1442 if (!(local->sband_allocated & BIT(band))) 1443 continue; 1444 kfree(local->hw.wiphy->bands[band]); 1445 } 1446 1447 wiphy_free(local->hw.wiphy); 1448 } 1449 EXPORT_SYMBOL(ieee80211_free_hw); 1450 1451 static int __init ieee80211_init(void) 1452 { 1453 struct sk_buff *skb; 1454 int ret; 1455 1456 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1457 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1458 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1459 1460 ret = rc80211_minstrel_init(); 1461 if (ret) 1462 return ret; 1463 1464 ret = ieee80211_iface_init(); 1465 if (ret) 1466 goto err_netdev; 1467 1468 return 0; 1469 err_netdev: 1470 rc80211_minstrel_exit(); 1471 1472 return ret; 1473 } 1474 1475 static void __exit ieee80211_exit(void) 1476 { 1477 rc80211_minstrel_exit(); 1478 1479 ieee80211s_stop(); 1480 1481 ieee80211_iface_exit(); 1482 1483 rcu_barrier(); 1484 } 1485 1486 1487 subsys_initcall(ieee80211_init); 1488 module_exit(ieee80211_exit); 1489 1490 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1491 MODULE_LICENSE("GPL"); 1492