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 - 2019 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 36void 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 86static 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 94static 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 168int 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 202void 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 213u32 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 223static void ieee80211_tasklet_handler(unsigned long data) 224{ 225 struct ieee80211_local *local = (struct ieee80211_local *) data; 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 250static 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; 255 256 /* wait for scan work complete */ 257 flush_workqueue(local->workqueue); 258 flush_work(&local->sched_scan_stopped_work); 259 260 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 261 "%s called with hardware scan in progress\n", __func__); 262 263 flush_work(&local->radar_detected_work); 264 rtnl_lock(); 265 list_for_each_entry(sdata, &local->interfaces, list) { 266 /* 267 * XXX: there may be more work for other vif types and even 268 * for station mode: a good thing would be to run most of 269 * the iface type's dependent _stop (ieee80211_mg_stop, 270 * ieee80211_ibss_stop) etc... 271 * For now, fix only the specific bug that was seen: race 272 * between csa_connection_drop_work and us. 273 */ 274 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 275 /* 276 * This worker is scheduled from the iface worker that 277 * runs on mac80211's workqueue, so we can't be 278 * scheduling this worker after the cancel right here. 279 * The exception is ieee80211_chswitch_done. 280 * Then we can have a race... 281 */ 282 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 283 } 284 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 285 } 286 ieee80211_scan_cancel(local); 287 288 /* make sure any new ROC will consider local->in_reconfig */ 289 flush_delayed_work(&local->roc_work); 290 flush_work(&local->hw_roc_done); 291 292 /* wait for all packet processing to be done */ 293 synchronize_net(); 294 295 ieee80211_reconfig(local); 296 rtnl_unlock(); 297} 298 299void ieee80211_restart_hw(struct ieee80211_hw *hw) 300{ 301 struct ieee80211_local *local = hw_to_local(hw); 302 303 trace_api_restart_hw(local); 304 305 wiphy_info(hw->wiphy, 306 "Hardware restart was requested\n"); 307 308 /* use this reason, ieee80211_reconfig will unblock it */ 309 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 310 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 311 false); 312 313 /* 314 * Stop all Rx during the reconfig. We don't want state changes 315 * or driver callbacks while this is in progress. 316 */ 317 local->in_reconfig = true; 318 barrier(); 319 320 queue_work(system_freezable_wq, &local->restart_work); 321} 322EXPORT_SYMBOL(ieee80211_restart_hw); 323 324#ifdef CONFIG_INET 325static int ieee80211_ifa_changed(struct notifier_block *nb, 326 unsigned long data, void *arg) 327{ 328 struct in_ifaddr *ifa = arg; 329 struct ieee80211_local *local = 330 container_of(nb, struct ieee80211_local, 331 ifa_notifier); 332 struct net_device *ndev = ifa->ifa_dev->dev; 333 struct wireless_dev *wdev = ndev->ieee80211_ptr; 334 struct in_device *idev; 335 struct ieee80211_sub_if_data *sdata; 336 struct ieee80211_bss_conf *bss_conf; 337 struct ieee80211_if_managed *ifmgd; 338 int c = 0; 339 340 /* Make sure it's our interface that got changed */ 341 if (!wdev) 342 return NOTIFY_DONE; 343 344 if (wdev->wiphy != local->hw.wiphy) 345 return NOTIFY_DONE; 346 347 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 348 bss_conf = &sdata->vif.bss_conf; 349 350 /* ARP filtering is only supported in managed mode */ 351 if (sdata->vif.type != NL80211_IFTYPE_STATION) 352 return NOTIFY_DONE; 353 354 idev = __in_dev_get_rtnl(sdata->dev); 355 if (!idev) 356 return NOTIFY_DONE; 357 358 ifmgd = &sdata->u.mgd; 359 sdata_lock(sdata); 360 361 /* Copy the addresses to the bss_conf list */ 362 ifa = rtnl_dereference(idev->ifa_list); 363 while (ifa) { 364 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 365 bss_conf->arp_addr_list[c] = ifa->ifa_address; 366 ifa = rtnl_dereference(ifa->ifa_next); 367 c++; 368 } 369 370 bss_conf->arp_addr_cnt = c; 371 372 /* Configure driver only if associated (which also implies it is up) */ 373 if (ifmgd->associated) 374 ieee80211_bss_info_change_notify(sdata, 375 BSS_CHANGED_ARP_FILTER); 376 377 sdata_unlock(sdata); 378 379 return NOTIFY_OK; 380} 381#endif 382 383#if IS_ENABLED(CONFIG_IPV6) 384static int ieee80211_ifa6_changed(struct notifier_block *nb, 385 unsigned long data, void *arg) 386{ 387 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 388 struct inet6_dev *idev = ifa->idev; 389 struct net_device *ndev = ifa->idev->dev; 390 struct ieee80211_local *local = 391 container_of(nb, struct ieee80211_local, ifa6_notifier); 392 struct wireless_dev *wdev = ndev->ieee80211_ptr; 393 struct ieee80211_sub_if_data *sdata; 394 395 /* Make sure it's our interface that got changed */ 396 if (!wdev || wdev->wiphy != local->hw.wiphy) 397 return NOTIFY_DONE; 398 399 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 400 401 /* 402 * For now only support station mode. This is mostly because 403 * doing AP would have to handle AP_VLAN in some way ... 404 */ 405 if (sdata->vif.type != NL80211_IFTYPE_STATION) 406 return NOTIFY_DONE; 407 408 drv_ipv6_addr_change(local, sdata, idev); 409 410 return NOTIFY_OK; 411} 412#endif 413 414/* There isn't a lot of sense in it, but you can transmit anything you like */ 415static const struct ieee80211_txrx_stypes 416ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 417 [NL80211_IFTYPE_ADHOC] = { 418 .tx = 0xffff, 419 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 420 BIT(IEEE80211_STYPE_AUTH >> 4) | 421 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 423 }, 424 [NL80211_IFTYPE_STATION] = { 425 .tx = 0xffff, 426 /* 427 * To support Pre Association Security Negotiation (PASN) while 428 * already associated to one AP, allow user space to register to 429 * Rx authentication frames, so that the user space logic would 430 * be able to receive/handle authentication frames from a 431 * different AP as part of PASN. 432 * It is expected that user space would intelligently register 433 * for Rx authentication frames, i.e., only when PASN is used 434 * and configure a match filter only for PASN authentication 435 * algorithm, as otherwise the MLME functionality of mac80211 436 * would be broken. 437 */ 438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 439 BIT(IEEE80211_STYPE_AUTH >> 4) | 440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 441 }, 442 [NL80211_IFTYPE_AP] = { 443 .tx = 0xffff, 444 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 445 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 447 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 448 BIT(IEEE80211_STYPE_AUTH >> 4) | 449 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 450 BIT(IEEE80211_STYPE_ACTION >> 4), 451 }, 452 [NL80211_IFTYPE_AP_VLAN] = { 453 /* copy AP */ 454 .tx = 0xffff, 455 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 456 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 457 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 458 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 459 BIT(IEEE80211_STYPE_AUTH >> 4) | 460 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 461 BIT(IEEE80211_STYPE_ACTION >> 4), 462 }, 463 [NL80211_IFTYPE_P2P_CLIENT] = { 464 .tx = 0xffff, 465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 466 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 467 }, 468 [NL80211_IFTYPE_P2P_GO] = { 469 .tx = 0xffff, 470 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 471 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 473 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 474 BIT(IEEE80211_STYPE_AUTH >> 4) | 475 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 476 BIT(IEEE80211_STYPE_ACTION >> 4), 477 }, 478 [NL80211_IFTYPE_MESH_POINT] = { 479 .tx = 0xffff, 480 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 481 BIT(IEEE80211_STYPE_AUTH >> 4) | 482 BIT(IEEE80211_STYPE_DEAUTH >> 4), 483 }, 484 [NL80211_IFTYPE_P2P_DEVICE] = { 485 .tx = 0xffff, 486 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 487 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 488 }, 489}; 490 491static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 492 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 493 IEEE80211_HT_AMPDU_PARM_DENSITY, 494 495 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 496 IEEE80211_HT_CAP_MAX_AMSDU | 497 IEEE80211_HT_CAP_SGI_20 | 498 IEEE80211_HT_CAP_SGI_40 | 499 IEEE80211_HT_CAP_TX_STBC | 500 IEEE80211_HT_CAP_RX_STBC | 501 IEEE80211_HT_CAP_LDPC_CODING | 502 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 503 .mcs = { 504 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 505 0xff, 0xff, 0xff, 0xff, 0xff, }, 506 }, 507}; 508 509static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 510 .vht_cap_info = 511 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 512 IEEE80211_VHT_CAP_SHORT_GI_80 | 513 IEEE80211_VHT_CAP_SHORT_GI_160 | 514 IEEE80211_VHT_CAP_RXSTBC_MASK | 515 IEEE80211_VHT_CAP_TXSTBC | 516 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 517 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 518 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 519 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 520 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 521 .supp_mcs = { 522 .rx_mcs_map = cpu_to_le16(~0), 523 .tx_mcs_map = cpu_to_le16(~0), 524 }, 525}; 526 527struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 528 const struct ieee80211_ops *ops, 529 const char *requested_name) 530{ 531 struct ieee80211_local *local; 532 int priv_size, i; 533 struct wiphy *wiphy; 534 bool use_chanctx; 535 536 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 537 !ops->add_interface || !ops->remove_interface || 538 !ops->configure_filter)) 539 return NULL; 540 541 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 542 return NULL; 543 544 /* check all or no channel context operations exist */ 545 i = !!ops->add_chanctx + !!ops->remove_chanctx + 546 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 547 !!ops->unassign_vif_chanctx; 548 if (WARN_ON(i != 0 && i != 5)) 549 return NULL; 550 use_chanctx = i == 5; 551 552 /* Ensure 32-byte alignment of our private data and hw private data. 553 * We use the wiphy priv data for both our ieee80211_local and for 554 * the driver's private data 555 * 556 * In memory it'll be like this: 557 * 558 * +-------------------------+ 559 * | struct wiphy | 560 * +-------------------------+ 561 * | struct ieee80211_local | 562 * +-------------------------+ 563 * | driver's private data | 564 * +-------------------------+ 565 * 566 */ 567 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 568 569 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 570 571 if (!wiphy) 572 return NULL; 573 574 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 575 576 wiphy->privid = mac80211_wiphy_privid; 577 578 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 579 WIPHY_FLAG_4ADDR_AP | 580 WIPHY_FLAG_4ADDR_STATION | 581 WIPHY_FLAG_REPORTS_OBSS | 582 WIPHY_FLAG_OFFCHAN_TX; 583 584 if (!use_chanctx || ops->remain_on_channel) 585 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 586 587 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 588 NL80211_FEATURE_SAE | 589 NL80211_FEATURE_HT_IBSS | 590 NL80211_FEATURE_VIF_TXPOWER | 591 NL80211_FEATURE_MAC_ON_CREATE | 592 NL80211_FEATURE_USERSPACE_MPM | 593 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 594 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 595 wiphy_ext_feature_set(wiphy, 596 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 597 wiphy_ext_feature_set(wiphy, 598 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 599 wiphy_ext_feature_set(wiphy, 600 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 601 wiphy_ext_feature_set(wiphy, 602 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 603 604 if (!ops->hw_scan) { 605 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 606 NL80211_FEATURE_AP_SCAN; 607 /* 608 * if the driver behaves correctly using the probe request 609 * (template) from mac80211, then both of these should be 610 * supported even with hw scan - but let drivers opt in. 611 */ 612 wiphy_ext_feature_set(wiphy, 613 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 614 wiphy_ext_feature_set(wiphy, 615 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 616 } 617 618 if (!ops->set_key) 619 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 620 621 if (ops->wake_tx_queue) 622 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 623 624 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 625 626 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 627 628 local = wiphy_priv(wiphy); 629 630 if (sta_info_init(local)) 631 goto err_free; 632 633 local->hw.wiphy = wiphy; 634 635 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 636 637 local->ops = ops; 638 local->use_chanctx = use_chanctx; 639 640 /* 641 * We need a bit of data queued to build aggregates properly, so 642 * instruct the TCP stack to allow more than a single ms of data 643 * to be queued in the stack. The value is a bit-shift of 1 644 * second, so 7 is ~8ms of queued data. Only affects local TCP 645 * sockets. 646 * This is the default, anyhow - drivers may need to override it 647 * for local reasons (longer buffers, longer completion time, or 648 * similar). 649 */ 650 local->hw.tx_sk_pacing_shift = 7; 651 652 /* set up some defaults */ 653 local->hw.queues = 1; 654 local->hw.max_rates = 1; 655 local->hw.max_report_rates = 0; 656 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 657 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 658 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 659 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 660 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 661 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 662 IEEE80211_RADIOTAP_MCS_HAVE_GI | 663 IEEE80211_RADIOTAP_MCS_HAVE_BW; 664 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 665 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 666 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 667 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 668 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 669 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 670 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 671 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 672 673 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 674 675 wiphy->extended_capabilities = local->ext_capa; 676 wiphy->extended_capabilities_mask = local->ext_capa; 677 wiphy->extended_capabilities_len = 678 ARRAY_SIZE(local->ext_capa); 679 680 INIT_LIST_HEAD(&local->interfaces); 681 INIT_LIST_HEAD(&local->mon_list); 682 683 __hw_addr_init(&local->mc_list); 684 685 mutex_init(&local->iflist_mtx); 686 mutex_init(&local->mtx); 687 688 mutex_init(&local->key_mtx); 689 spin_lock_init(&local->filter_lock); 690 spin_lock_init(&local->rx_path_lock); 691 spin_lock_init(&local->queue_stop_reason_lock); 692 693 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 694 INIT_LIST_HEAD(&local->active_txqs[i]); 695 spin_lock_init(&local->active_txq_lock[i]); 696 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 697 local->aql_txq_limit_high[i] = 698 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 699 } 700 701 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 702 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 703 atomic_set(&local->aql_total_pending_airtime, 0); 704 705 INIT_LIST_HEAD(&local->chanctx_list); 706 mutex_init(&local->chanctx_mtx); 707 708 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 709 710 INIT_WORK(&local->restart_work, ieee80211_restart_work); 711 712 INIT_WORK(&local->radar_detected_work, 713 ieee80211_dfs_radar_detected_work); 714 715 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 716 local->smps_mode = IEEE80211_SMPS_OFF; 717 718 INIT_WORK(&local->dynamic_ps_enable_work, 719 ieee80211_dynamic_ps_enable_work); 720 INIT_WORK(&local->dynamic_ps_disable_work, 721 ieee80211_dynamic_ps_disable_work); 722 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 723 724 INIT_WORK(&local->sched_scan_stopped_work, 725 ieee80211_sched_scan_stopped_work); 726 727 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 728 729 spin_lock_init(&local->ack_status_lock); 730 idr_init(&local->ack_status_frames); 731 732 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 733 skb_queue_head_init(&local->pending[i]); 734 atomic_set(&local->agg_queue_stop[i], 0); 735 } 736 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 737 (unsigned long)local); 738 739 if (ops->wake_tx_queue) 740 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs, 741 (unsigned long)local); 742 743 tasklet_init(&local->tasklet, 744 ieee80211_tasklet_handler, 745 (unsigned long) local); 746 747 skb_queue_head_init(&local->skb_queue); 748 skb_queue_head_init(&local->skb_queue_unreliable); 749 skb_queue_head_init(&local->skb_queue_tdls_chsw); 750 751 ieee80211_alloc_led_names(local); 752 753 ieee80211_roc_setup(local); 754 755 local->hw.radiotap_timestamp.units_pos = -1; 756 local->hw.radiotap_timestamp.accuracy = -1; 757 758 return &local->hw; 759 err_free: 760 wiphy_free(wiphy); 761 return NULL; 762} 763EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 764 765static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 766{ 767 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 768 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 769 int n_suites = 0, r = 0, w = 0; 770 u32 *suites; 771 static const u32 cipher_suites[] = { 772 /* keep WEP first, it may be removed below */ 773 WLAN_CIPHER_SUITE_WEP40, 774 WLAN_CIPHER_SUITE_WEP104, 775 WLAN_CIPHER_SUITE_TKIP, 776 WLAN_CIPHER_SUITE_CCMP, 777 WLAN_CIPHER_SUITE_CCMP_256, 778 WLAN_CIPHER_SUITE_GCMP, 779 WLAN_CIPHER_SUITE_GCMP_256, 780 781 /* keep last -- depends on hw flags! */ 782 WLAN_CIPHER_SUITE_AES_CMAC, 783 WLAN_CIPHER_SUITE_BIP_CMAC_256, 784 WLAN_CIPHER_SUITE_BIP_GMAC_128, 785 WLAN_CIPHER_SUITE_BIP_GMAC_256, 786 }; 787 788 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 789 local->hw.wiphy->cipher_suites) { 790 /* If the driver advertises, or doesn't support SW crypto, 791 * we only need to remove WEP if necessary. 792 */ 793 if (have_wep) 794 return 0; 795 796 /* well if it has _no_ ciphers ... fine */ 797 if (!local->hw.wiphy->n_cipher_suites) 798 return 0; 799 800 /* Driver provides cipher suites, but we need to exclude WEP */ 801 suites = kmemdup(local->hw.wiphy->cipher_suites, 802 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 803 GFP_KERNEL); 804 if (!suites) 805 return -ENOMEM; 806 807 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 808 u32 suite = local->hw.wiphy->cipher_suites[r]; 809 810 if (suite == WLAN_CIPHER_SUITE_WEP40 || 811 suite == WLAN_CIPHER_SUITE_WEP104) 812 continue; 813 suites[w++] = suite; 814 } 815 } else if (!local->hw.cipher_schemes) { 816 /* If the driver doesn't have cipher schemes, there's nothing 817 * else to do other than assign the (software supported and 818 * perhaps offloaded) cipher suites. 819 */ 820 local->hw.wiphy->cipher_suites = cipher_suites; 821 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 822 823 if (!have_mfp) 824 local->hw.wiphy->n_cipher_suites -= 4; 825 826 if (!have_wep) { 827 local->hw.wiphy->cipher_suites += 2; 828 local->hw.wiphy->n_cipher_suites -= 2; 829 } 830 831 /* not dynamically allocated, so just return */ 832 return 0; 833 } else { 834 const struct ieee80211_cipher_scheme *cs; 835 836 cs = local->hw.cipher_schemes; 837 838 /* Driver specifies cipher schemes only (but not cipher suites 839 * including the schemes) 840 * 841 * We start counting ciphers defined by schemes, TKIP, CCMP, 842 * CCMP-256, GCMP, and GCMP-256 843 */ 844 n_suites = local->hw.n_cipher_schemes + 5; 845 846 /* check if we have WEP40 and WEP104 */ 847 if (have_wep) 848 n_suites += 2; 849 850 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 851 * BIP-GMAC-256 852 */ 853 if (have_mfp) 854 n_suites += 4; 855 856 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 857 if (!suites) 858 return -ENOMEM; 859 860 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 861 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 862 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 863 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 864 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 865 866 if (have_wep) { 867 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 868 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 869 } 870 871 if (have_mfp) { 872 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 873 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 874 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 875 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 876 } 877 878 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 879 suites[w++] = cs[r].cipher; 880 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 881 kfree(suites); 882 return -EINVAL; 883 } 884 } 885 } 886 887 local->hw.wiphy->cipher_suites = suites; 888 local->hw.wiphy->n_cipher_suites = w; 889 local->wiphy_ciphers_allocated = true; 890 891 return 0; 892} 893 894int ieee80211_register_hw(struct ieee80211_hw *hw) 895{ 896 struct ieee80211_local *local = hw_to_local(hw); 897 int result, i; 898 enum nl80211_band band; 899 int channels, max_bitrates; 900 bool supp_ht, supp_vht, supp_he; 901 struct cfg80211_chan_def dflt_chandef = {}; 902 903 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 904 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 905 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 906 return -EINVAL; 907 908 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 909 (!local->ops->tdls_channel_switch || 910 !local->ops->tdls_cancel_channel_switch || 911 !local->ops->tdls_recv_channel_switch)) 912 return -EOPNOTSUPP; 913 914 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 915 !local->ops->set_frag_threshold)) 916 return -EINVAL; 917 918 if (WARN_ON(local->hw.wiphy->interface_modes & 919 BIT(NL80211_IFTYPE_NAN) && 920 (!local->ops->start_nan || !local->ops->stop_nan))) 921 return -EINVAL; 922 923#ifdef CONFIG_PM 924 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 925 return -EINVAL; 926#endif 927 928 if (!local->use_chanctx) { 929 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 930 const struct ieee80211_iface_combination *comb; 931 932 comb = &local->hw.wiphy->iface_combinations[i]; 933 934 if (comb->num_different_channels > 1) 935 return -EINVAL; 936 } 937 } else { 938 /* 939 * WDS is currently prohibited when channel contexts are used 940 * because there's no clear definition of which channel WDS 941 * type interfaces use 942 */ 943 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 944 return -EINVAL; 945 946 /* DFS is not supported with multi-channel combinations yet */ 947 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 948 const struct ieee80211_iface_combination *comb; 949 950 comb = &local->hw.wiphy->iface_combinations[i]; 951 952 if (comb->radar_detect_widths && 953 comb->num_different_channels > 1) 954 return -EINVAL; 955 } 956 } 957 958 /* Only HW csum features are currently compatible with mac80211 */ 959 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 960 return -EINVAL; 961 962 if (hw->max_report_rates == 0) 963 hw->max_report_rates = hw->max_rates; 964 965 local->rx_chains = 1; 966 967 /* 968 * generic code guarantees at least one band, 969 * set this very early because much code assumes 970 * that hw.conf.channel is assigned 971 */ 972 channels = 0; 973 max_bitrates = 0; 974 supp_ht = false; 975 supp_vht = false; 976 supp_he = false; 977 for (band = 0; band < NUM_NL80211_BANDS; band++) { 978 struct ieee80211_supported_band *sband; 979 980 sband = local->hw.wiphy->bands[band]; 981 if (!sband) 982 continue; 983 984 if (!dflt_chandef.chan) { 985 /* 986 * Assign the first enabled channel to dflt_chandef 987 * from the list of channels 988 */ 989 for (i = 0; i < sband->n_channels; i++) 990 if (!(sband->channels[i].flags & 991 IEEE80211_CHAN_DISABLED)) 992 break; 993 /* if none found then use the first anyway */ 994 if (i == sband->n_channels) 995 i = 0; 996 cfg80211_chandef_create(&dflt_chandef, 997 &sband->channels[i], 998 NL80211_CHAN_NO_HT); 999 /* init channel we're on */ 1000 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1001 local->hw.conf.chandef = dflt_chandef; 1002 local->_oper_chandef = dflt_chandef; 1003 } 1004 local->monitor_chandef = dflt_chandef; 1005 } 1006 1007 channels += sband->n_channels; 1008 1009 if (max_bitrates < sband->n_bitrates) 1010 max_bitrates = sband->n_bitrates; 1011 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1012 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1013 1014 if (!supp_he) 1015 supp_he = !!ieee80211_get_he_sta_cap(sband); 1016 1017 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1018 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1019 (supp_ht || supp_vht || supp_he))) 1020 return -EINVAL; 1021 1022 if (!sband->ht_cap.ht_supported) 1023 continue; 1024 1025 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1026 local->rx_chains = 1027 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1028 local->rx_chains); 1029 1030 /* no need to mask, SM_PS_DISABLED has all bits set */ 1031 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1032 IEEE80211_HT_CAP_SM_PS_SHIFT; 1033 } 1034 1035 /* if low-level driver supports AP, we also support VLAN. 1036 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1037 * based on their support to transmit SW encrypted packets. 1038 */ 1039 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1040 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1041 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1042 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1043 } 1044 1045 /* mac80211 always supports monitor */ 1046 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1047 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1048 1049 /* mac80211 doesn't support more than one IBSS interface right now */ 1050 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1051 const struct ieee80211_iface_combination *c; 1052 int j; 1053 1054 c = &hw->wiphy->iface_combinations[i]; 1055 1056 for (j = 0; j < c->n_limits; j++) 1057 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1058 c->limits[j].max > 1) 1059 return -EINVAL; 1060 } 1061 1062 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1063 sizeof(void *) * channels, GFP_KERNEL); 1064 if (!local->int_scan_req) 1065 return -ENOMEM; 1066 1067 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1068 if (!local->hw.wiphy->bands[band]) 1069 continue; 1070 local->int_scan_req->rates[band] = (u32) -1; 1071 } 1072 1073#ifndef CONFIG_MAC80211_MESH 1074 /* mesh depends on Kconfig, but drivers should set it if they want */ 1075 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1076#endif 1077 1078 /* if the underlying driver supports mesh, mac80211 will (at least) 1079 * provide routing of mesh authentication frames to userspace */ 1080 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1081 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1082 1083 /* mac80211 supports control port protocol changing */ 1084 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1085 1086 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1087 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1088 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1089 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1090 if (hw->max_signal <= 0) { 1091 result = -EINVAL; 1092 goto fail_workqueue; 1093 } 1094 } 1095 1096 /* Mac80211 and therefore all drivers using SW crypto only 1097 * are able to handle PTK rekeys and Extended Key ID. 1098 */ 1099 if (!local->ops->set_key) { 1100 wiphy_ext_feature_set(local->hw.wiphy, 1101 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1102 wiphy_ext_feature_set(local->hw.wiphy, 1103 NL80211_EXT_FEATURE_EXT_KEY_ID); 1104 } 1105 1106 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1107 wiphy_ext_feature_set(local->hw.wiphy, 1108 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1109 1110 /* 1111 * Calculate scan IE length -- we need this to alloc 1112 * memory and to subtract from the driver limit. It 1113 * includes the DS Params, (extended) supported rates, and HT 1114 * information -- SSID is the driver's responsibility. 1115 */ 1116 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1117 3 /* DS Params */; 1118 if (supp_ht) 1119 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1120 1121 if (supp_vht) 1122 local->scan_ies_len += 1123 2 + sizeof(struct ieee80211_vht_cap); 1124 1125 /* HE cap element is variable in size - set len to allow max size */ 1126 /* 1127 * TODO: 1 is added at the end of the calculation to accommodate for 1128 * the temporary placing of the HE capabilities IE under EXT. 1129 * Remove it once it is placed in the final place. 1130 */ 1131 if (supp_he) 1132 local->scan_ies_len += 1133 2 + sizeof(struct ieee80211_he_cap_elem) + 1134 sizeof(struct ieee80211_he_mcs_nss_supp) + 1135 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1136 1137 if (!local->ops->hw_scan) { 1138 /* For hw_scan, driver needs to set these up. */ 1139 local->hw.wiphy->max_scan_ssids = 4; 1140 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1141 } 1142 1143 /* 1144 * If the driver supports any scan IEs, then assume the 1145 * limit includes the IEs mac80211 will add, otherwise 1146 * leave it at zero and let the driver sort it out; we 1147 * still pass our IEs to the driver but userspace will 1148 * not be allowed to in that case. 1149 */ 1150 if (local->hw.wiphy->max_scan_ie_len) 1151 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1152 1153 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1154 local->hw.n_cipher_schemes))) { 1155 result = -EINVAL; 1156 goto fail_workqueue; 1157 } 1158 1159 result = ieee80211_init_cipher_suites(local); 1160 if (result < 0) 1161 goto fail_workqueue; 1162 1163 if (!local->ops->remain_on_channel) 1164 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1165 1166 /* mac80211 based drivers don't support internal TDLS setup */ 1167 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1168 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1169 1170 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1171 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1172 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1173 1174 /* mac80211 supports multi BSSID, if the driver supports it */ 1175 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1176 local->hw.wiphy->support_mbssid = true; 1177 if (ieee80211_hw_check(&local->hw, 1178 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1179 local->hw.wiphy->support_only_he_mbssid = true; 1180 else 1181 local->ext_capa[2] |= 1182 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1183 } 1184 1185 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1186 1187 /* 1188 * We use the number of queues for feature tests (QoS, HT) internally 1189 * so restrict them appropriately. 1190 */ 1191 if (hw->queues > IEEE80211_MAX_QUEUES) 1192 hw->queues = IEEE80211_MAX_QUEUES; 1193 1194 local->workqueue = 1195 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1196 if (!local->workqueue) { 1197 result = -ENOMEM; 1198 goto fail_workqueue; 1199 } 1200 1201 /* 1202 * The hardware needs headroom for sending the frame, 1203 * and we need some headroom for passing the frame to monitor 1204 * interfaces, but never both at the same time. 1205 */ 1206 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1207 IEEE80211_TX_STATUS_HEADROOM); 1208 1209 /* 1210 * if the driver doesn't specify a max listen interval we 1211 * use 5 which should be a safe default 1212 */ 1213 if (local->hw.max_listen_interval == 0) 1214 local->hw.max_listen_interval = 5; 1215 1216 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1217 1218 local->dynamic_ps_forced_timeout = -1; 1219 1220 if (!local->hw.max_nan_de_entries) 1221 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1222 1223 if (!local->hw.weight_multiplier) 1224 local->hw.weight_multiplier = 1; 1225 1226 ieee80211_wep_init(local); 1227 1228 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1229 1230 ieee80211_led_init(local); 1231 1232 result = ieee80211_txq_setup_flows(local); 1233 if (result) 1234 goto fail_flows; 1235 1236 rtnl_lock(); 1237 result = ieee80211_init_rate_ctrl_alg(local, 1238 hw->rate_control_algorithm); 1239 rtnl_unlock(); 1240 if (result < 0) { 1241 wiphy_debug(local->hw.wiphy, 1242 "Failed to initialize rate control algorithm\n"); 1243 goto fail_rate; 1244 } 1245 1246 if (local->rate_ctrl) { 1247 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1248 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1249 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1250 } 1251 1252 /* 1253 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1254 * or have it when we don't, copy the sband structure and set/clear it. 1255 * This is necessary because rate scaling algorithms could be switched 1256 * and have different support values. 1257 * Print a message so that in the common case the reallocation can be 1258 * avoided. 1259 */ 1260 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1261 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1262 struct ieee80211_supported_band *sband; 1263 bool local_cap, ie_cap; 1264 1265 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1266 1267 sband = local->hw.wiphy->bands[band]; 1268 if (!sband || !sband->vht_cap.vht_supported) 1269 continue; 1270 1271 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1272 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1273 1274 if (local_cap == ie_cap) 1275 continue; 1276 1277 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1278 if (!sband) { 1279 result = -ENOMEM; 1280 goto fail_rate; 1281 } 1282 1283 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1284 band); 1285 1286 sband->vht_cap.vht_mcs.tx_highest ^= 1287 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1288 1289 local->hw.wiphy->bands[band] = sband; 1290 local->sband_allocated |= BIT(band); 1291 } 1292 1293 result = wiphy_register(local->hw.wiphy); 1294 if (result < 0) 1295 goto fail_wiphy_register; 1296 1297 debugfs_hw_add(local); 1298 rate_control_add_debugfs(local); 1299 1300 rtnl_lock(); 1301 1302 /* add one default STA interface if supported */ 1303 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1304 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1305 struct vif_params params = {0}; 1306 1307 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1308 NL80211_IFTYPE_STATION, ¶ms); 1309 if (result) 1310 wiphy_warn(local->hw.wiphy, 1311 "Failed to add default virtual iface\n"); 1312 } 1313 1314 rtnl_unlock(); 1315 1316#ifdef CONFIG_INET 1317 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1318 result = register_inetaddr_notifier(&local->ifa_notifier); 1319 if (result) 1320 goto fail_ifa; 1321#endif 1322 1323#if IS_ENABLED(CONFIG_IPV6) 1324 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1325 result = register_inet6addr_notifier(&local->ifa6_notifier); 1326 if (result) 1327 goto fail_ifa6; 1328#endif 1329 1330 return 0; 1331 1332#if IS_ENABLED(CONFIG_IPV6) 1333 fail_ifa6: 1334#ifdef CONFIG_INET 1335 unregister_inetaddr_notifier(&local->ifa_notifier); 1336#endif 1337#endif 1338#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1339 fail_ifa: 1340#endif 1341 wiphy_unregister(local->hw.wiphy); 1342 fail_wiphy_register: 1343 rtnl_lock(); 1344 rate_control_deinitialize(local); 1345 ieee80211_remove_interfaces(local); 1346 rtnl_unlock(); 1347 fail_rate: 1348 fail_flows: 1349 ieee80211_led_exit(local); 1350 destroy_workqueue(local->workqueue); 1351 fail_workqueue: 1352 if (local->wiphy_ciphers_allocated) { 1353 kfree(local->hw.wiphy->cipher_suites); 1354 local->wiphy_ciphers_allocated = false; 1355 } 1356 kfree(local->int_scan_req); 1357 return result; 1358} 1359EXPORT_SYMBOL(ieee80211_register_hw); 1360 1361void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1362{ 1363 struct ieee80211_local *local = hw_to_local(hw); 1364 1365 tasklet_kill(&local->tx_pending_tasklet); 1366 tasklet_kill(&local->tasklet); 1367 1368#ifdef CONFIG_INET 1369 unregister_inetaddr_notifier(&local->ifa_notifier); 1370#endif 1371#if IS_ENABLED(CONFIG_IPV6) 1372 unregister_inet6addr_notifier(&local->ifa6_notifier); 1373#endif 1374 1375 rtnl_lock(); 1376 1377 /* 1378 * At this point, interface list manipulations are fine 1379 * because the driver cannot be handing us frames any 1380 * more and the tasklet is killed. 1381 */ 1382 ieee80211_remove_interfaces(local); 1383 1384 rtnl_unlock(); 1385 1386 cancel_delayed_work_sync(&local->roc_work); 1387 cancel_work_sync(&local->restart_work); 1388 cancel_work_sync(&local->reconfig_filter); 1389 cancel_work_sync(&local->tdls_chsw_work); 1390 flush_work(&local->sched_scan_stopped_work); 1391 flush_work(&local->radar_detected_work); 1392 1393 ieee80211_clear_tx_pending(local); 1394 rate_control_deinitialize(local); 1395 1396 if (skb_queue_len(&local->skb_queue) || 1397 skb_queue_len(&local->skb_queue_unreliable)) 1398 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1399 skb_queue_purge(&local->skb_queue); 1400 skb_queue_purge(&local->skb_queue_unreliable); 1401 skb_queue_purge(&local->skb_queue_tdls_chsw); 1402 1403 wiphy_unregister(local->hw.wiphy); 1404 destroy_workqueue(local->workqueue); 1405 ieee80211_led_exit(local); 1406 kfree(local->int_scan_req); 1407} 1408EXPORT_SYMBOL(ieee80211_unregister_hw); 1409 1410static int ieee80211_free_ack_frame(int id, void *p, void *data) 1411{ 1412 WARN_ONCE(1, "Have pending ack frames!\n"); 1413 kfree_skb(p); 1414 return 0; 1415} 1416 1417void ieee80211_free_hw(struct ieee80211_hw *hw) 1418{ 1419 struct ieee80211_local *local = hw_to_local(hw); 1420 enum nl80211_band band; 1421 1422 mutex_destroy(&local->iflist_mtx); 1423 mutex_destroy(&local->mtx); 1424 1425 if (local->wiphy_ciphers_allocated) { 1426 kfree(local->hw.wiphy->cipher_suites); 1427 local->wiphy_ciphers_allocated = false; 1428 } 1429 1430 idr_for_each(&local->ack_status_frames, 1431 ieee80211_free_ack_frame, NULL); 1432 idr_destroy(&local->ack_status_frames); 1433 1434 sta_info_stop(local); 1435 1436 ieee80211_free_led_names(local); 1437 1438 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1439 if (!(local->sband_allocated & BIT(band))) 1440 continue; 1441 kfree(local->hw.wiphy->bands[band]); 1442 } 1443 1444 wiphy_free(local->hw.wiphy); 1445} 1446EXPORT_SYMBOL(ieee80211_free_hw); 1447 1448static int __init ieee80211_init(void) 1449{ 1450 struct sk_buff *skb; 1451 int ret; 1452 1453 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1454 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1455 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1456 1457 ret = rc80211_minstrel_init(); 1458 if (ret) 1459 return ret; 1460 1461 ret = ieee80211_iface_init(); 1462 if (ret) 1463 goto err_netdev; 1464 1465 return 0; 1466 err_netdev: 1467 rc80211_minstrel_exit(); 1468 1469 return ret; 1470} 1471 1472static void __exit ieee80211_exit(void) 1473{ 1474 rc80211_minstrel_exit(); 1475 1476 ieee80211s_stop(); 1477 1478 ieee80211_iface_exit(); 1479 1480 rcu_barrier(); 1481} 1482 1483 1484subsys_initcall(ieee80211_init); 1485module_exit(ieee80211_exit); 1486 1487MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1488MODULE_LICENSE("GPL"); 1489