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 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 spin_lock_bh(&local->filter_lock); 68 changed_flags = local->filter_flags ^ new_flags; 69 70 mc = drv_prepare_multicast(local, &local->mc_list); 71 spin_unlock_bh(&local->filter_lock); 72 73 /* be a bit nasty */ 74 new_flags |= (1<<31); 75 76 drv_configure_filter(local, changed_flags, &new_flags, mc); 77 78 WARN_ON(new_flags & (1<<31)); 79 80 local->filter_flags = new_flags & ~(1<<31); 81 } 82 83 static void ieee80211_reconfig_filter(struct work_struct *work) 84 { 85 struct ieee80211_local *local = 86 container_of(work, struct ieee80211_local, reconfig_filter); 87 88 ieee80211_configure_filter(local); 89 } 90 91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 92 { 93 struct ieee80211_sub_if_data *sdata; 94 struct cfg80211_chan_def chandef = {}; 95 u32 changed = 0; 96 int power; 97 u32 offchannel_flag; 98 99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 100 101 if (local->scan_chandef.chan) { 102 chandef = local->scan_chandef; 103 } else if (local->tmp_channel) { 104 chandef.chan = local->tmp_channel; 105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 106 chandef.center_freq1 = chandef.chan->center_freq; 107 } else 108 chandef = local->_oper_chandef; 109 110 WARN(!cfg80211_chandef_valid(&chandef), 111 "control:%d MHz width:%d center: %d/%d MHz", 112 chandef.chan->center_freq, chandef.width, 113 chandef.center_freq1, chandef.center_freq2); 114 115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 117 else 118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 119 120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 121 122 if (offchannel_flag || 123 !cfg80211_chandef_identical(&local->hw.conf.chandef, 124 &local->_oper_chandef)) { 125 local->hw.conf.chandef = chandef; 126 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 127 } 128 129 if (!conf_is_ht(&local->hw.conf)) { 130 /* 131 * mac80211.h documents that this is only valid 132 * when the channel is set to an HT type, and 133 * that otherwise STATIC is used. 134 */ 135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 136 } else if (local->hw.conf.smps_mode != local->smps_mode) { 137 local->hw.conf.smps_mode = local->smps_mode; 138 changed |= IEEE80211_CONF_CHANGE_SMPS; 139 } 140 141 power = ieee80211_chandef_max_power(&chandef); 142 143 rcu_read_lock(); 144 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 145 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 146 continue; 147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 148 continue; 149 power = min(power, sdata->vif.bss_conf.txpower); 150 } 151 rcu_read_unlock(); 152 153 if (local->hw.conf.power_level != power) { 154 changed |= IEEE80211_CONF_CHANGE_POWER; 155 local->hw.conf.power_level = power; 156 } 157 158 return changed; 159 } 160 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 162 { 163 int ret = 0; 164 165 might_sleep(); 166 167 if (!local->use_chanctx) 168 changed |= ieee80211_hw_conf_chan(local); 169 else 170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 171 IEEE80211_CONF_CHANGE_POWER); 172 173 if (changed && local->open_count) { 174 ret = drv_config(local, changed); 175 /* 176 * Goal: 177 * HW reconfiguration should never fail, the driver has told 178 * us what it can support so it should live up to that promise. 179 * 180 * Current status: 181 * rfkill is not integrated with mac80211 and a 182 * configuration command can thus fail if hardware rfkill 183 * is enabled 184 * 185 * FIXME: integrate rfkill with mac80211 and then add this 186 * WARN_ON() back 187 * 188 */ 189 /* WARN_ON(ret); */ 190 } 191 192 return ret; 193 } 194 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 196 u32 changed) 197 { 198 struct ieee80211_local *local = sdata->local; 199 200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 201 return; 202 203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 204 } 205 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 207 { 208 sdata->vif.bss_conf.use_cts_prot = false; 209 sdata->vif.bss_conf.use_short_preamble = false; 210 sdata->vif.bss_conf.use_short_slot = false; 211 return BSS_CHANGED_ERP_CTS_PROT | 212 BSS_CHANGED_ERP_PREAMBLE | 213 BSS_CHANGED_ERP_SLOT; 214 } 215 216 static void ieee80211_tasklet_handler(unsigned long data) 217 { 218 struct ieee80211_local *local = (struct ieee80211_local *) data; 219 struct sk_buff *skb; 220 221 while ((skb = skb_dequeue(&local->skb_queue)) || 222 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 223 switch (skb->pkt_type) { 224 case IEEE80211_RX_MSG: 225 /* Clear skb->pkt_type in order to not confuse kernel 226 * netstack. */ 227 skb->pkt_type = 0; 228 ieee80211_rx(&local->hw, skb); 229 break; 230 case IEEE80211_TX_STATUS_MSG: 231 skb->pkt_type = 0; 232 ieee80211_tx_status(&local->hw, skb); 233 break; 234 default: 235 WARN(1, "mac80211: Packet is of unknown type %d\n", 236 skb->pkt_type); 237 dev_kfree_skb(skb); 238 break; 239 } 240 } 241 } 242 243 static void ieee80211_restart_work(struct work_struct *work) 244 { 245 struct ieee80211_local *local = 246 container_of(work, struct ieee80211_local, restart_work); 247 struct ieee80211_sub_if_data *sdata; 248 249 /* wait for scan work complete */ 250 flush_workqueue(local->workqueue); 251 flush_work(&local->sched_scan_stopped_work); 252 253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 254 "%s called with hardware scan in progress\n", __func__); 255 256 flush_work(&local->radar_detected_work); 257 rtnl_lock(); 258 list_for_each_entry(sdata, &local->interfaces, list) { 259 /* 260 * XXX: there may be more work for other vif types and even 261 * for station mode: a good thing would be to run most of 262 * the iface type's dependent _stop (ieee80211_mg_stop, 263 * ieee80211_ibss_stop) etc... 264 * For now, fix only the specific bug that was seen: race 265 * between csa_connection_drop_work and us. 266 */ 267 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 268 /* 269 * This worker is scheduled from the iface worker that 270 * runs on mac80211's workqueue, so we can't be 271 * scheduling this worker after the cancel right here. 272 * The exception is ieee80211_chswitch_done. 273 * Then we can have a race... 274 */ 275 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 276 } 277 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 278 } 279 ieee80211_scan_cancel(local); 280 281 /* make sure any new ROC will consider local->in_reconfig */ 282 flush_delayed_work(&local->roc_work); 283 flush_work(&local->hw_roc_done); 284 285 /* wait for all packet processing to be done */ 286 synchronize_net(); 287 288 ieee80211_reconfig(local); 289 rtnl_unlock(); 290 } 291 292 void ieee80211_restart_hw(struct ieee80211_hw *hw) 293 { 294 struct ieee80211_local *local = hw_to_local(hw); 295 296 trace_api_restart_hw(local); 297 298 wiphy_info(hw->wiphy, 299 "Hardware restart was requested\n"); 300 301 /* use this reason, ieee80211_reconfig will unblock it */ 302 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 303 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 304 false); 305 306 /* 307 * Stop all Rx during the reconfig. We don't want state changes 308 * or driver callbacks while this is in progress. 309 */ 310 local->in_reconfig = true; 311 barrier(); 312 313 queue_work(system_freezable_wq, &local->restart_work); 314 } 315 EXPORT_SYMBOL(ieee80211_restart_hw); 316 317 #ifdef CONFIG_INET 318 static int ieee80211_ifa_changed(struct notifier_block *nb, 319 unsigned long data, void *arg) 320 { 321 struct in_ifaddr *ifa = arg; 322 struct ieee80211_local *local = 323 container_of(nb, struct ieee80211_local, 324 ifa_notifier); 325 struct net_device *ndev = ifa->ifa_dev->dev; 326 struct wireless_dev *wdev = ndev->ieee80211_ptr; 327 struct in_device *idev; 328 struct ieee80211_sub_if_data *sdata; 329 struct ieee80211_bss_conf *bss_conf; 330 struct ieee80211_if_managed *ifmgd; 331 int c = 0; 332 333 /* Make sure it's our interface that got changed */ 334 if (!wdev) 335 return NOTIFY_DONE; 336 337 if (wdev->wiphy != local->hw.wiphy) 338 return NOTIFY_DONE; 339 340 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 341 bss_conf = &sdata->vif.bss_conf; 342 343 /* ARP filtering is only supported in managed mode */ 344 if (sdata->vif.type != NL80211_IFTYPE_STATION) 345 return NOTIFY_DONE; 346 347 idev = __in_dev_get_rtnl(sdata->dev); 348 if (!idev) 349 return NOTIFY_DONE; 350 351 ifmgd = &sdata->u.mgd; 352 sdata_lock(sdata); 353 354 /* Copy the addresses to the bss_conf list */ 355 ifa = rtnl_dereference(idev->ifa_list); 356 while (ifa) { 357 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 358 bss_conf->arp_addr_list[c] = ifa->ifa_address; 359 ifa = rtnl_dereference(ifa->ifa_next); 360 c++; 361 } 362 363 bss_conf->arp_addr_cnt = c; 364 365 /* Configure driver only if associated (which also implies it is up) */ 366 if (ifmgd->associated) 367 ieee80211_bss_info_change_notify(sdata, 368 BSS_CHANGED_ARP_FILTER); 369 370 sdata_unlock(sdata); 371 372 return NOTIFY_OK; 373 } 374 #endif 375 376 #if IS_ENABLED(CONFIG_IPV6) 377 static int ieee80211_ifa6_changed(struct notifier_block *nb, 378 unsigned long data, void *arg) 379 { 380 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 381 struct inet6_dev *idev = ifa->idev; 382 struct net_device *ndev = ifa->idev->dev; 383 struct ieee80211_local *local = 384 container_of(nb, struct ieee80211_local, ifa6_notifier); 385 struct wireless_dev *wdev = ndev->ieee80211_ptr; 386 struct ieee80211_sub_if_data *sdata; 387 388 /* Make sure it's our interface that got changed */ 389 if (!wdev || wdev->wiphy != local->hw.wiphy) 390 return NOTIFY_DONE; 391 392 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 393 394 /* 395 * For now only support station mode. This is mostly because 396 * doing AP would have to handle AP_VLAN in some way ... 397 */ 398 if (sdata->vif.type != NL80211_IFTYPE_STATION) 399 return NOTIFY_DONE; 400 401 drv_ipv6_addr_change(local, sdata, idev); 402 403 return NOTIFY_OK; 404 } 405 #endif 406 407 /* There isn't a lot of sense in it, but you can transmit anything you like */ 408 static const struct ieee80211_txrx_stypes 409 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 410 [NL80211_IFTYPE_ADHOC] = { 411 .tx = 0xffff, 412 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 413 BIT(IEEE80211_STYPE_AUTH >> 4) | 414 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 416 }, 417 [NL80211_IFTYPE_STATION] = { 418 .tx = 0xffff, 419 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 420 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 421 }, 422 [NL80211_IFTYPE_AP] = { 423 .tx = 0xffff, 424 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 425 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 426 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 427 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 428 BIT(IEEE80211_STYPE_AUTH >> 4) | 429 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 430 BIT(IEEE80211_STYPE_ACTION >> 4), 431 }, 432 [NL80211_IFTYPE_AP_VLAN] = { 433 /* copy AP */ 434 .tx = 0xffff, 435 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 436 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 438 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 439 BIT(IEEE80211_STYPE_AUTH >> 4) | 440 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 441 BIT(IEEE80211_STYPE_ACTION >> 4), 442 }, 443 [NL80211_IFTYPE_P2P_CLIENT] = { 444 .tx = 0xffff, 445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 447 }, 448 [NL80211_IFTYPE_P2P_GO] = { 449 .tx = 0xffff, 450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 453 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 454 BIT(IEEE80211_STYPE_AUTH >> 4) | 455 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 456 BIT(IEEE80211_STYPE_ACTION >> 4), 457 }, 458 [NL80211_IFTYPE_MESH_POINT] = { 459 .tx = 0xffff, 460 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 461 BIT(IEEE80211_STYPE_AUTH >> 4) | 462 BIT(IEEE80211_STYPE_DEAUTH >> 4), 463 }, 464 [NL80211_IFTYPE_P2P_DEVICE] = { 465 .tx = 0xffff, 466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 468 }, 469 }; 470 471 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 472 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 473 IEEE80211_HT_AMPDU_PARM_DENSITY, 474 475 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 476 IEEE80211_HT_CAP_MAX_AMSDU | 477 IEEE80211_HT_CAP_SGI_20 | 478 IEEE80211_HT_CAP_SGI_40 | 479 IEEE80211_HT_CAP_TX_STBC | 480 IEEE80211_HT_CAP_RX_STBC | 481 IEEE80211_HT_CAP_LDPC_CODING | 482 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 483 .mcs = { 484 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 485 0xff, 0xff, 0xff, 0xff, 0xff, }, 486 }, 487 }; 488 489 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 490 .vht_cap_info = 491 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 492 IEEE80211_VHT_CAP_SHORT_GI_80 | 493 IEEE80211_VHT_CAP_SHORT_GI_160 | 494 IEEE80211_VHT_CAP_RXSTBC_MASK | 495 IEEE80211_VHT_CAP_TXSTBC | 496 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 497 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 498 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 499 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 500 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 501 .supp_mcs = { 502 .rx_mcs_map = cpu_to_le16(~0), 503 .tx_mcs_map = cpu_to_le16(~0), 504 }, 505 }; 506 507 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 508 const struct ieee80211_ops *ops, 509 const char *requested_name) 510 { 511 struct ieee80211_local *local; 512 int priv_size, i; 513 struct wiphy *wiphy; 514 bool use_chanctx; 515 516 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 517 !ops->add_interface || !ops->remove_interface || 518 !ops->configure_filter)) 519 return NULL; 520 521 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 522 return NULL; 523 524 /* check all or no channel context operations exist */ 525 i = !!ops->add_chanctx + !!ops->remove_chanctx + 526 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 527 !!ops->unassign_vif_chanctx; 528 if (WARN_ON(i != 0 && i != 5)) 529 return NULL; 530 use_chanctx = i == 5; 531 532 /* Ensure 32-byte alignment of our private data and hw private data. 533 * We use the wiphy priv data for both our ieee80211_local and for 534 * the driver's private data 535 * 536 * In memory it'll be like this: 537 * 538 * +-------------------------+ 539 * | struct wiphy | 540 * +-------------------------+ 541 * | struct ieee80211_local | 542 * +-------------------------+ 543 * | driver's private data | 544 * +-------------------------+ 545 * 546 */ 547 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 548 549 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 550 551 if (!wiphy) 552 return NULL; 553 554 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 555 556 wiphy->privid = mac80211_wiphy_privid; 557 558 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 559 WIPHY_FLAG_4ADDR_AP | 560 WIPHY_FLAG_4ADDR_STATION | 561 WIPHY_FLAG_REPORTS_OBSS | 562 WIPHY_FLAG_OFFCHAN_TX; 563 564 if (ops->remain_on_channel) 565 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 566 567 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 568 NL80211_FEATURE_SAE | 569 NL80211_FEATURE_HT_IBSS | 570 NL80211_FEATURE_VIF_TXPOWER | 571 NL80211_FEATURE_MAC_ON_CREATE | 572 NL80211_FEATURE_USERSPACE_MPM | 573 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 574 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 575 wiphy_ext_feature_set(wiphy, 576 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 577 578 if (!ops->hw_scan) { 579 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 580 NL80211_FEATURE_AP_SCAN; 581 /* 582 * if the driver behaves correctly using the probe request 583 * (template) from mac80211, then both of these should be 584 * supported even with hw scan - but let drivers opt in. 585 */ 586 wiphy_ext_feature_set(wiphy, 587 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 588 wiphy_ext_feature_set(wiphy, 589 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 590 } 591 592 if (!ops->set_key) 593 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 594 595 if (ops->wake_tx_queue) 596 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 597 598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 599 600 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 601 602 local = wiphy_priv(wiphy); 603 604 if (sta_info_init(local)) 605 goto err_free; 606 607 local->hw.wiphy = wiphy; 608 609 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 610 611 local->ops = ops; 612 local->use_chanctx = use_chanctx; 613 614 /* 615 * We need a bit of data queued to build aggregates properly, so 616 * instruct the TCP stack to allow more than a single ms of data 617 * to be queued in the stack. The value is a bit-shift of 1 618 * second, so 7 is ~8ms of queued data. Only affects local TCP 619 * sockets. 620 * This is the default, anyhow - drivers may need to override it 621 * for local reasons (longer buffers, longer completion time, or 622 * similar). 623 */ 624 local->hw.tx_sk_pacing_shift = 7; 625 626 /* set up some defaults */ 627 local->hw.queues = 1; 628 local->hw.max_rates = 1; 629 local->hw.max_report_rates = 0; 630 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 631 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 632 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 633 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 634 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 635 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 636 IEEE80211_RADIOTAP_MCS_HAVE_GI | 637 IEEE80211_RADIOTAP_MCS_HAVE_BW; 638 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 639 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 640 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 641 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 642 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 643 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 644 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 645 646 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 647 648 wiphy->extended_capabilities = local->ext_capa; 649 wiphy->extended_capabilities_mask = local->ext_capa; 650 wiphy->extended_capabilities_len = 651 ARRAY_SIZE(local->ext_capa); 652 653 INIT_LIST_HEAD(&local->interfaces); 654 INIT_LIST_HEAD(&local->mon_list); 655 656 __hw_addr_init(&local->mc_list); 657 658 mutex_init(&local->iflist_mtx); 659 mutex_init(&local->mtx); 660 661 mutex_init(&local->key_mtx); 662 spin_lock_init(&local->filter_lock); 663 spin_lock_init(&local->rx_path_lock); 664 spin_lock_init(&local->queue_stop_reason_lock); 665 666 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 667 INIT_LIST_HEAD(&local->active_txqs[i]); 668 spin_lock_init(&local->active_txq_lock[i]); 669 } 670 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 671 672 INIT_LIST_HEAD(&local->chanctx_list); 673 mutex_init(&local->chanctx_mtx); 674 675 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 676 677 INIT_WORK(&local->restart_work, ieee80211_restart_work); 678 679 INIT_WORK(&local->radar_detected_work, 680 ieee80211_dfs_radar_detected_work); 681 682 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 683 local->smps_mode = IEEE80211_SMPS_OFF; 684 685 INIT_WORK(&local->dynamic_ps_enable_work, 686 ieee80211_dynamic_ps_enable_work); 687 INIT_WORK(&local->dynamic_ps_disable_work, 688 ieee80211_dynamic_ps_disable_work); 689 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 690 691 INIT_WORK(&local->sched_scan_stopped_work, 692 ieee80211_sched_scan_stopped_work); 693 694 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 695 696 spin_lock_init(&local->ack_status_lock); 697 idr_init(&local->ack_status_frames); 698 699 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 700 skb_queue_head_init(&local->pending[i]); 701 atomic_set(&local->agg_queue_stop[i], 0); 702 } 703 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 704 (unsigned long)local); 705 706 if (ops->wake_tx_queue) 707 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs, 708 (unsigned long)local); 709 710 tasklet_init(&local->tasklet, 711 ieee80211_tasklet_handler, 712 (unsigned long) local); 713 714 skb_queue_head_init(&local->skb_queue); 715 skb_queue_head_init(&local->skb_queue_unreliable); 716 skb_queue_head_init(&local->skb_queue_tdls_chsw); 717 718 ieee80211_alloc_led_names(local); 719 720 ieee80211_roc_setup(local); 721 722 local->hw.radiotap_timestamp.units_pos = -1; 723 local->hw.radiotap_timestamp.accuracy = -1; 724 725 return &local->hw; 726 err_free: 727 wiphy_free(wiphy); 728 return NULL; 729 } 730 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 731 732 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 733 { 734 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 735 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 736 int n_suites = 0, r = 0, w = 0; 737 u32 *suites; 738 static const u32 cipher_suites[] = { 739 /* keep WEP first, it may be removed below */ 740 WLAN_CIPHER_SUITE_WEP40, 741 WLAN_CIPHER_SUITE_WEP104, 742 WLAN_CIPHER_SUITE_TKIP, 743 WLAN_CIPHER_SUITE_CCMP, 744 WLAN_CIPHER_SUITE_CCMP_256, 745 WLAN_CIPHER_SUITE_GCMP, 746 WLAN_CIPHER_SUITE_GCMP_256, 747 748 /* keep last -- depends on hw flags! */ 749 WLAN_CIPHER_SUITE_AES_CMAC, 750 WLAN_CIPHER_SUITE_BIP_CMAC_256, 751 WLAN_CIPHER_SUITE_BIP_GMAC_128, 752 WLAN_CIPHER_SUITE_BIP_GMAC_256, 753 }; 754 755 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 756 local->hw.wiphy->cipher_suites) { 757 /* If the driver advertises, or doesn't support SW crypto, 758 * we only need to remove WEP if necessary. 759 */ 760 if (have_wep) 761 return 0; 762 763 /* well if it has _no_ ciphers ... fine */ 764 if (!local->hw.wiphy->n_cipher_suites) 765 return 0; 766 767 /* Driver provides cipher suites, but we need to exclude WEP */ 768 suites = kmemdup(local->hw.wiphy->cipher_suites, 769 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 770 GFP_KERNEL); 771 if (!suites) 772 return -ENOMEM; 773 774 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 775 u32 suite = local->hw.wiphy->cipher_suites[r]; 776 777 if (suite == WLAN_CIPHER_SUITE_WEP40 || 778 suite == WLAN_CIPHER_SUITE_WEP104) 779 continue; 780 suites[w++] = suite; 781 } 782 } else if (!local->hw.cipher_schemes) { 783 /* If the driver doesn't have cipher schemes, there's nothing 784 * else to do other than assign the (software supported and 785 * perhaps offloaded) cipher suites. 786 */ 787 local->hw.wiphy->cipher_suites = cipher_suites; 788 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 789 790 if (!have_mfp) 791 local->hw.wiphy->n_cipher_suites -= 4; 792 793 if (!have_wep) { 794 local->hw.wiphy->cipher_suites += 2; 795 local->hw.wiphy->n_cipher_suites -= 2; 796 } 797 798 /* not dynamically allocated, so just return */ 799 return 0; 800 } else { 801 const struct ieee80211_cipher_scheme *cs; 802 803 cs = local->hw.cipher_schemes; 804 805 /* Driver specifies cipher schemes only (but not cipher suites 806 * including the schemes) 807 * 808 * We start counting ciphers defined by schemes, TKIP, CCMP, 809 * CCMP-256, GCMP, and GCMP-256 810 */ 811 n_suites = local->hw.n_cipher_schemes + 5; 812 813 /* check if we have WEP40 and WEP104 */ 814 if (have_wep) 815 n_suites += 2; 816 817 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 818 * BIP-GMAC-256 819 */ 820 if (have_mfp) 821 n_suites += 4; 822 823 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 824 if (!suites) 825 return -ENOMEM; 826 827 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 828 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 829 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 830 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 831 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 832 833 if (have_wep) { 834 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 835 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 836 } 837 838 if (have_mfp) { 839 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 840 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 841 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 842 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 843 } 844 845 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 846 suites[w++] = cs[r].cipher; 847 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 848 kfree(suites); 849 return -EINVAL; 850 } 851 } 852 } 853 854 local->hw.wiphy->cipher_suites = suites; 855 local->hw.wiphy->n_cipher_suites = w; 856 local->wiphy_ciphers_allocated = true; 857 858 return 0; 859 } 860 861 int ieee80211_register_hw(struct ieee80211_hw *hw) 862 { 863 struct ieee80211_local *local = hw_to_local(hw); 864 int result, i; 865 enum nl80211_band band; 866 int channels, max_bitrates; 867 bool supp_ht, supp_vht, supp_he; 868 netdev_features_t feature_whitelist; 869 struct cfg80211_chan_def dflt_chandef = {}; 870 871 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 872 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 873 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 874 return -EINVAL; 875 876 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 877 (!local->ops->tdls_channel_switch || 878 !local->ops->tdls_cancel_channel_switch || 879 !local->ops->tdls_recv_channel_switch)) 880 return -EOPNOTSUPP; 881 882 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 883 !local->ops->set_frag_threshold)) 884 return -EINVAL; 885 886 if (WARN_ON(local->hw.wiphy->interface_modes & 887 BIT(NL80211_IFTYPE_NAN) && 888 (!local->ops->start_nan || !local->ops->stop_nan))) 889 return -EINVAL; 890 891 #ifdef CONFIG_PM 892 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 893 return -EINVAL; 894 #endif 895 896 if (!local->use_chanctx) { 897 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 898 const struct ieee80211_iface_combination *comb; 899 900 comb = &local->hw.wiphy->iface_combinations[i]; 901 902 if (comb->num_different_channels > 1) 903 return -EINVAL; 904 } 905 } else { 906 /* 907 * WDS is currently prohibited when channel contexts are used 908 * because there's no clear definition of which channel WDS 909 * type interfaces use 910 */ 911 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 912 return -EINVAL; 913 914 /* DFS is not supported with multi-channel combinations yet */ 915 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 916 const struct ieee80211_iface_combination *comb; 917 918 comb = &local->hw.wiphy->iface_combinations[i]; 919 920 if (comb->radar_detect_widths && 921 comb->num_different_channels > 1) 922 return -EINVAL; 923 } 924 } 925 926 /* Only HW csum features are currently compatible with mac80211 */ 927 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 928 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 929 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM; 930 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 931 return -EINVAL; 932 933 if (hw->max_report_rates == 0) 934 hw->max_report_rates = hw->max_rates; 935 936 local->rx_chains = 1; 937 938 /* 939 * generic code guarantees at least one band, 940 * set this very early because much code assumes 941 * that hw.conf.channel is assigned 942 */ 943 channels = 0; 944 max_bitrates = 0; 945 supp_ht = false; 946 supp_vht = false; 947 supp_he = false; 948 for (band = 0; band < NUM_NL80211_BANDS; band++) { 949 struct ieee80211_supported_band *sband; 950 951 sband = local->hw.wiphy->bands[band]; 952 if (!sband) 953 continue; 954 955 if (!dflt_chandef.chan) { 956 cfg80211_chandef_create(&dflt_chandef, 957 &sband->channels[0], 958 NL80211_CHAN_NO_HT); 959 /* init channel we're on */ 960 if (!local->use_chanctx && !local->_oper_chandef.chan) { 961 local->hw.conf.chandef = dflt_chandef; 962 local->_oper_chandef = dflt_chandef; 963 } 964 local->monitor_chandef = dflt_chandef; 965 } 966 967 channels += sband->n_channels; 968 969 if (max_bitrates < sband->n_bitrates) 970 max_bitrates = sband->n_bitrates; 971 supp_ht = supp_ht || sband->ht_cap.ht_supported; 972 supp_vht = supp_vht || sband->vht_cap.vht_supported; 973 974 if (!supp_he) 975 supp_he = !!ieee80211_get_he_sta_cap(sband); 976 977 if (!sband->ht_cap.ht_supported) 978 continue; 979 980 /* TODO: consider VHT for RX chains, hopefully it's the same */ 981 local->rx_chains = 982 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 983 local->rx_chains); 984 985 /* no need to mask, SM_PS_DISABLED has all bits set */ 986 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 987 IEEE80211_HT_CAP_SM_PS_SHIFT; 988 } 989 990 /* if low-level driver supports AP, we also support VLAN. 991 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 992 * based on their support to transmit SW encrypted packets. 993 */ 994 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 995 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 996 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 997 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 998 } 999 1000 /* mac80211 always supports monitor */ 1001 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1002 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1003 1004 /* mac80211 doesn't support more than one IBSS interface right now */ 1005 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1006 const struct ieee80211_iface_combination *c; 1007 int j; 1008 1009 c = &hw->wiphy->iface_combinations[i]; 1010 1011 for (j = 0; j < c->n_limits; j++) 1012 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1013 c->limits[j].max > 1) 1014 return -EINVAL; 1015 } 1016 1017 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1018 sizeof(void *) * channels, GFP_KERNEL); 1019 if (!local->int_scan_req) 1020 return -ENOMEM; 1021 1022 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1023 if (!local->hw.wiphy->bands[band]) 1024 continue; 1025 local->int_scan_req->rates[band] = (u32) -1; 1026 } 1027 1028 #ifndef CONFIG_MAC80211_MESH 1029 /* mesh depends on Kconfig, but drivers should set it if they want */ 1030 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1031 #endif 1032 1033 /* if the underlying driver supports mesh, mac80211 will (at least) 1034 * provide routing of mesh authentication frames to userspace */ 1035 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1036 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1037 1038 /* mac80211 supports control port protocol changing */ 1039 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1040 1041 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1042 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1043 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1044 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1045 if (hw->max_signal <= 0) { 1046 result = -EINVAL; 1047 goto fail_wiphy_register; 1048 } 1049 } 1050 1051 /* Enable Extended Key IDs when driver allowed it, or when it 1052 * supports neither HW crypto nor A-MPDUs 1053 */ 1054 if ((!local->ops->set_key && 1055 !ieee80211_hw_check(hw, AMPDU_AGGREGATION)) || 1056 ieee80211_hw_check(&local->hw, EXT_KEY_ID_NATIVE)) 1057 wiphy_ext_feature_set(local->hw.wiphy, 1058 NL80211_EXT_FEATURE_EXT_KEY_ID); 1059 1060 /* Mac80211 and therefore all cards only using SW crypto are able to 1061 * handle PTK rekeys correctly 1062 */ 1063 if (!local->ops->set_key) 1064 wiphy_ext_feature_set(local->hw.wiphy, 1065 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1066 1067 /* 1068 * Calculate scan IE length -- we need this to alloc 1069 * memory and to subtract from the driver limit. It 1070 * includes the DS Params, (extended) supported rates, and HT 1071 * information -- SSID is the driver's responsibility. 1072 */ 1073 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1074 3 /* DS Params */; 1075 if (supp_ht) 1076 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1077 1078 if (supp_vht) 1079 local->scan_ies_len += 1080 2 + sizeof(struct ieee80211_vht_cap); 1081 1082 /* HE cap element is variable in size - set len to allow max size */ 1083 /* 1084 * TODO: 1 is added at the end of the calculation to accommodate for 1085 * the temporary placing of the HE capabilities IE under EXT. 1086 * Remove it once it is placed in the final place. 1087 */ 1088 if (supp_he) 1089 local->scan_ies_len += 1090 2 + sizeof(struct ieee80211_he_cap_elem) + 1091 sizeof(struct ieee80211_he_mcs_nss_supp) + 1092 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1093 1094 if (!local->ops->hw_scan) { 1095 /* For hw_scan, driver needs to set these up. */ 1096 local->hw.wiphy->max_scan_ssids = 4; 1097 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1098 } 1099 1100 /* 1101 * If the driver supports any scan IEs, then assume the 1102 * limit includes the IEs mac80211 will add, otherwise 1103 * leave it at zero and let the driver sort it out; we 1104 * still pass our IEs to the driver but userspace will 1105 * not be allowed to in that case. 1106 */ 1107 if (local->hw.wiphy->max_scan_ie_len) 1108 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1109 1110 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1111 local->hw.n_cipher_schemes)); 1112 1113 result = ieee80211_init_cipher_suites(local); 1114 if (result < 0) 1115 goto fail_wiphy_register; 1116 1117 if (!local->ops->remain_on_channel) 1118 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1119 1120 /* mac80211 based drivers don't support internal TDLS setup */ 1121 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1122 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1123 1124 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1125 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1126 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1127 1128 /* mac80211 supports multi BSSID, if the driver supports it */ 1129 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1130 local->hw.wiphy->support_mbssid = true; 1131 if (ieee80211_hw_check(&local->hw, 1132 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1133 local->hw.wiphy->support_only_he_mbssid = true; 1134 else 1135 local->ext_capa[2] |= 1136 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1137 } 1138 1139 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1140 1141 result = wiphy_register(local->hw.wiphy); 1142 if (result < 0) 1143 goto fail_wiphy_register; 1144 1145 /* 1146 * We use the number of queues for feature tests (QoS, HT) internally 1147 * so restrict them appropriately. 1148 */ 1149 if (hw->queues > IEEE80211_MAX_QUEUES) 1150 hw->queues = IEEE80211_MAX_QUEUES; 1151 1152 local->workqueue = 1153 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1154 if (!local->workqueue) { 1155 result = -ENOMEM; 1156 goto fail_workqueue; 1157 } 1158 1159 /* 1160 * The hardware needs headroom for sending the frame, 1161 * and we need some headroom for passing the frame to monitor 1162 * interfaces, but never both at the same time. 1163 */ 1164 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1165 IEEE80211_TX_STATUS_HEADROOM); 1166 1167 debugfs_hw_add(local); 1168 1169 /* 1170 * if the driver doesn't specify a max listen interval we 1171 * use 5 which should be a safe default 1172 */ 1173 if (local->hw.max_listen_interval == 0) 1174 local->hw.max_listen_interval = 5; 1175 1176 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1177 1178 local->dynamic_ps_forced_timeout = -1; 1179 1180 if (!local->hw.max_nan_de_entries) 1181 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1182 1183 if (!local->hw.weight_multiplier) 1184 local->hw.weight_multiplier = 1; 1185 1186 result = ieee80211_wep_init(local); 1187 if (result < 0) 1188 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1189 result); 1190 1191 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1192 1193 ieee80211_led_init(local); 1194 1195 result = ieee80211_txq_setup_flows(local); 1196 if (result) 1197 goto fail_flows; 1198 1199 rtnl_lock(); 1200 1201 result = ieee80211_init_rate_ctrl_alg(local, 1202 hw->rate_control_algorithm); 1203 if (result < 0) { 1204 wiphy_debug(local->hw.wiphy, 1205 "Failed to initialize rate control algorithm\n"); 1206 goto fail_rate; 1207 } 1208 1209 if (local->rate_ctrl) { 1210 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1211 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1212 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1213 } 1214 1215 /* 1216 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1217 * or have it when we don't, copy the sband structure and set/clear it. 1218 * This is necessary because rate scaling algorithms could be switched 1219 * and have different support values. 1220 * Print a message so that in the common case the reallocation can be 1221 * avoided. 1222 */ 1223 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1224 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1225 struct ieee80211_supported_band *sband; 1226 bool local_cap, ie_cap; 1227 1228 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1229 1230 sband = local->hw.wiphy->bands[band]; 1231 if (!sband || !sband->vht_cap.vht_supported) 1232 continue; 1233 1234 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1235 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1236 1237 if (local_cap == ie_cap) 1238 continue; 1239 1240 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1241 if (!sband) { 1242 result = -ENOMEM; 1243 goto fail_rate; 1244 } 1245 1246 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1247 band); 1248 1249 sband->vht_cap.vht_mcs.tx_highest ^= 1250 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1251 1252 local->hw.wiphy->bands[band] = sband; 1253 local->sband_allocated |= BIT(band); 1254 } 1255 1256 /* add one default STA interface if supported */ 1257 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1258 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1259 struct vif_params params = {0}; 1260 1261 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1262 NL80211_IFTYPE_STATION, ¶ms); 1263 if (result) 1264 wiphy_warn(local->hw.wiphy, 1265 "Failed to add default virtual iface\n"); 1266 } 1267 1268 rtnl_unlock(); 1269 1270 #ifdef CONFIG_INET 1271 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1272 result = register_inetaddr_notifier(&local->ifa_notifier); 1273 if (result) 1274 goto fail_ifa; 1275 #endif 1276 1277 #if IS_ENABLED(CONFIG_IPV6) 1278 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1279 result = register_inet6addr_notifier(&local->ifa6_notifier); 1280 if (result) 1281 goto fail_ifa6; 1282 #endif 1283 1284 return 0; 1285 1286 #if IS_ENABLED(CONFIG_IPV6) 1287 fail_ifa6: 1288 #ifdef CONFIG_INET 1289 unregister_inetaddr_notifier(&local->ifa_notifier); 1290 #endif 1291 #endif 1292 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1293 fail_ifa: 1294 #endif 1295 rtnl_lock(); 1296 rate_control_deinitialize(local); 1297 ieee80211_remove_interfaces(local); 1298 fail_rate: 1299 rtnl_unlock(); 1300 ieee80211_led_exit(local); 1301 fail_flows: 1302 destroy_workqueue(local->workqueue); 1303 fail_workqueue: 1304 wiphy_unregister(local->hw.wiphy); 1305 fail_wiphy_register: 1306 if (local->wiphy_ciphers_allocated) 1307 kfree(local->hw.wiphy->cipher_suites); 1308 kfree(local->int_scan_req); 1309 return result; 1310 } 1311 EXPORT_SYMBOL(ieee80211_register_hw); 1312 1313 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1314 { 1315 struct ieee80211_local *local = hw_to_local(hw); 1316 1317 tasklet_kill(&local->tx_pending_tasklet); 1318 tasklet_kill(&local->tasklet); 1319 1320 #ifdef CONFIG_INET 1321 unregister_inetaddr_notifier(&local->ifa_notifier); 1322 #endif 1323 #if IS_ENABLED(CONFIG_IPV6) 1324 unregister_inet6addr_notifier(&local->ifa6_notifier); 1325 #endif 1326 1327 rtnl_lock(); 1328 1329 /* 1330 * At this point, interface list manipulations are fine 1331 * because the driver cannot be handing us frames any 1332 * more and the tasklet is killed. 1333 */ 1334 ieee80211_remove_interfaces(local); 1335 1336 rtnl_unlock(); 1337 1338 cancel_delayed_work_sync(&local->roc_work); 1339 cancel_work_sync(&local->restart_work); 1340 cancel_work_sync(&local->reconfig_filter); 1341 cancel_work_sync(&local->tdls_chsw_work); 1342 flush_work(&local->sched_scan_stopped_work); 1343 flush_work(&local->radar_detected_work); 1344 1345 ieee80211_clear_tx_pending(local); 1346 rate_control_deinitialize(local); 1347 1348 if (skb_queue_len(&local->skb_queue) || 1349 skb_queue_len(&local->skb_queue_unreliable)) 1350 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1351 skb_queue_purge(&local->skb_queue); 1352 skb_queue_purge(&local->skb_queue_unreliable); 1353 skb_queue_purge(&local->skb_queue_tdls_chsw); 1354 1355 destroy_workqueue(local->workqueue); 1356 wiphy_unregister(local->hw.wiphy); 1357 ieee80211_led_exit(local); 1358 kfree(local->int_scan_req); 1359 } 1360 EXPORT_SYMBOL(ieee80211_unregister_hw); 1361 1362 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1363 { 1364 WARN_ONCE(1, "Have pending ack frames!\n"); 1365 kfree_skb(p); 1366 return 0; 1367 } 1368 1369 void ieee80211_free_hw(struct ieee80211_hw *hw) 1370 { 1371 struct ieee80211_local *local = hw_to_local(hw); 1372 enum nl80211_band band; 1373 1374 mutex_destroy(&local->iflist_mtx); 1375 mutex_destroy(&local->mtx); 1376 1377 if (local->wiphy_ciphers_allocated) 1378 kfree(local->hw.wiphy->cipher_suites); 1379 1380 idr_for_each(&local->ack_status_frames, 1381 ieee80211_free_ack_frame, NULL); 1382 idr_destroy(&local->ack_status_frames); 1383 1384 sta_info_stop(local); 1385 1386 ieee80211_free_led_names(local); 1387 1388 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1389 if (!(local->sband_allocated & BIT(band))) 1390 continue; 1391 kfree(local->hw.wiphy->bands[band]); 1392 } 1393 1394 wiphy_free(local->hw.wiphy); 1395 } 1396 EXPORT_SYMBOL(ieee80211_free_hw); 1397 1398 static int __init ieee80211_init(void) 1399 { 1400 struct sk_buff *skb; 1401 int ret; 1402 1403 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1404 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1405 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1406 1407 ret = rc80211_minstrel_init(); 1408 if (ret) 1409 return ret; 1410 1411 ret = ieee80211_iface_init(); 1412 if (ret) 1413 goto err_netdev; 1414 1415 return 0; 1416 err_netdev: 1417 rc80211_minstrel_exit(); 1418 1419 return ret; 1420 } 1421 1422 static void __exit ieee80211_exit(void) 1423 { 1424 rc80211_minstrel_exit(); 1425 1426 ieee80211s_stop(); 1427 1428 ieee80211_iface_exit(); 1429 1430 rcu_barrier(); 1431 } 1432 1433 1434 subsys_initcall(ieee80211_init); 1435 module_exit(ieee80211_exit); 1436 1437 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1438 MODULE_LICENSE("GPL"); 1439