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/init.h> 14 #include <linux/netdevice.h> 15 #include <linux/types.h> 16 #include <linux/slab.h> 17 #include <linux/skbuff.h> 18 #include <linux/etherdevice.h> 19 #include <linux/if_arp.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/bitmap.h> 22 #include <linux/inetdevice.h> 23 #include <net/net_namespace.h> 24 #include <net/cfg80211.h> 25 #include <net/addrconf.h> 26 27 #include "ieee80211_i.h" 28 #include "driver-ops.h" 29 #include "rate.h" 30 #include "mesh.h" 31 #include "wep.h" 32 #include "led.h" 33 #include "debugfs.h" 34 35 void ieee80211_configure_filter(struct ieee80211_local *local) 36 { 37 u64 mc; 38 unsigned int changed_flags; 39 unsigned int new_flags = 0; 40 41 if (atomic_read(&local->iff_allmultis)) 42 new_flags |= FIF_ALLMULTI; 43 44 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 45 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 46 new_flags |= FIF_BCN_PRBRESP_PROMISC; 47 48 if (local->fif_probe_req || local->probe_req_reg) 49 new_flags |= FIF_PROBE_REQ; 50 51 if (local->fif_fcsfail) 52 new_flags |= FIF_FCSFAIL; 53 54 if (local->fif_plcpfail) 55 new_flags |= FIF_PLCPFAIL; 56 57 if (local->fif_control) 58 new_flags |= FIF_CONTROL; 59 60 if (local->fif_other_bss) 61 new_flags |= FIF_OTHER_BSS; 62 63 if (local->fif_pspoll) 64 new_flags |= FIF_PSPOLL; 65 66 spin_lock_bh(&local->filter_lock); 67 changed_flags = local->filter_flags ^ new_flags; 68 69 mc = drv_prepare_multicast(local, &local->mc_list); 70 spin_unlock_bh(&local->filter_lock); 71 72 /* be a bit nasty */ 73 new_flags |= (1<<31); 74 75 drv_configure_filter(local, changed_flags, &new_flags, mc); 76 77 WARN_ON(new_flags & (1<<31)); 78 79 local->filter_flags = new_flags & ~(1<<31); 80 } 81 82 static void ieee80211_reconfig_filter(struct work_struct *work) 83 { 84 struct ieee80211_local *local = 85 container_of(work, struct ieee80211_local, reconfig_filter); 86 87 ieee80211_configure_filter(local); 88 } 89 90 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 91 { 92 struct ieee80211_sub_if_data *sdata; 93 struct cfg80211_chan_def chandef = {}; 94 u32 changed = 0; 95 int power; 96 u32 offchannel_flag; 97 98 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 99 100 if (local->scan_chandef.chan) { 101 chandef = local->scan_chandef; 102 } else if (local->tmp_channel) { 103 chandef.chan = local->tmp_channel; 104 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 105 chandef.center_freq1 = chandef.chan->center_freq; 106 } else 107 chandef = local->_oper_chandef; 108 109 WARN(!cfg80211_chandef_valid(&chandef), 110 "control:%d MHz width:%d center: %d/%d MHz", 111 chandef.chan->center_freq, chandef.width, 112 chandef.center_freq1, chandef.center_freq2); 113 114 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 115 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 116 else 117 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 118 119 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 120 121 if (offchannel_flag || 122 !cfg80211_chandef_identical(&local->hw.conf.chandef, 123 &local->_oper_chandef)) { 124 local->hw.conf.chandef = chandef; 125 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 126 } 127 128 if (!conf_is_ht(&local->hw.conf)) { 129 /* 130 * mac80211.h documents that this is only valid 131 * when the channel is set to an HT type, and 132 * that otherwise STATIC is used. 133 */ 134 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 135 } else if (local->hw.conf.smps_mode != local->smps_mode) { 136 local->hw.conf.smps_mode = local->smps_mode; 137 changed |= IEEE80211_CONF_CHANGE_SMPS; 138 } 139 140 power = ieee80211_chandef_max_power(&chandef); 141 142 rcu_read_lock(); 143 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 144 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 145 continue; 146 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 147 continue; 148 power = min(power, sdata->vif.bss_conf.txpower); 149 } 150 rcu_read_unlock(); 151 152 if (local->hw.conf.power_level != power) { 153 changed |= IEEE80211_CONF_CHANGE_POWER; 154 local->hw.conf.power_level = power; 155 } 156 157 return changed; 158 } 159 160 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 161 { 162 int ret = 0; 163 164 might_sleep(); 165 166 if (!local->use_chanctx) 167 changed |= ieee80211_hw_conf_chan(local); 168 else 169 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 170 IEEE80211_CONF_CHANGE_POWER); 171 172 if (changed && local->open_count) { 173 ret = drv_config(local, changed); 174 /* 175 * Goal: 176 * HW reconfiguration should never fail, the driver has told 177 * us what it can support so it should live up to that promise. 178 * 179 * Current status: 180 * rfkill is not integrated with mac80211 and a 181 * configuration command can thus fail if hardware rfkill 182 * is enabled 183 * 184 * FIXME: integrate rfkill with mac80211 and then add this 185 * WARN_ON() back 186 * 187 */ 188 /* WARN_ON(ret); */ 189 } 190 191 return ret; 192 } 193 194 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 195 u32 changed) 196 { 197 struct ieee80211_local *local = sdata->local; 198 199 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 200 return; 201 202 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 203 } 204 205 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 206 { 207 sdata->vif.bss_conf.use_cts_prot = false; 208 sdata->vif.bss_conf.use_short_preamble = false; 209 sdata->vif.bss_conf.use_short_slot = false; 210 return BSS_CHANGED_ERP_CTS_PROT | 211 BSS_CHANGED_ERP_PREAMBLE | 212 BSS_CHANGED_ERP_SLOT; 213 } 214 215 static void ieee80211_tasklet_handler(unsigned long data) 216 { 217 struct ieee80211_local *local = (struct ieee80211_local *) data; 218 struct sk_buff *skb; 219 220 while ((skb = skb_dequeue(&local->skb_queue)) || 221 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 222 switch (skb->pkt_type) { 223 case IEEE80211_RX_MSG: 224 /* Clear skb->pkt_type in order to not confuse kernel 225 * netstack. */ 226 skb->pkt_type = 0; 227 ieee80211_rx(&local->hw, skb); 228 break; 229 case IEEE80211_TX_STATUS_MSG: 230 skb->pkt_type = 0; 231 ieee80211_tx_status(&local->hw, skb); 232 break; 233 default: 234 WARN(1, "mac80211: Packet is of unknown type %d\n", 235 skb->pkt_type); 236 dev_kfree_skb(skb); 237 break; 238 } 239 } 240 } 241 242 static void ieee80211_restart_work(struct work_struct *work) 243 { 244 struct ieee80211_local *local = 245 container_of(work, struct ieee80211_local, restart_work); 246 struct ieee80211_sub_if_data *sdata; 247 248 /* wait for scan work complete */ 249 flush_workqueue(local->workqueue); 250 flush_work(&local->sched_scan_stopped_work); 251 252 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 253 "%s called with hardware scan in progress\n", __func__); 254 255 flush_work(&local->radar_detected_work); 256 rtnl_lock(); 257 list_for_each_entry(sdata, &local->interfaces, list) { 258 /* 259 * XXX: there may be more work for other vif types and even 260 * for station mode: a good thing would be to run most of 261 * the iface type's dependent _stop (ieee80211_mg_stop, 262 * ieee80211_ibss_stop) etc... 263 * For now, fix only the specific bug that was seen: race 264 * between csa_connection_drop_work and us. 265 */ 266 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 267 /* 268 * This worker is scheduled from the iface worker that 269 * runs on mac80211's workqueue, so we can't be 270 * scheduling this worker after the cancel right here. 271 * The exception is ieee80211_chswitch_done. 272 * Then we can have a race... 273 */ 274 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 275 } 276 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 277 } 278 ieee80211_scan_cancel(local); 279 280 /* make sure any new ROC will consider local->in_reconfig */ 281 flush_delayed_work(&local->roc_work); 282 flush_work(&local->hw_roc_done); 283 284 /* wait for all packet processing to be done */ 285 synchronize_net(); 286 287 ieee80211_reconfig(local); 288 rtnl_unlock(); 289 } 290 291 void ieee80211_restart_hw(struct ieee80211_hw *hw) 292 { 293 struct ieee80211_local *local = hw_to_local(hw); 294 295 trace_api_restart_hw(local); 296 297 wiphy_info(hw->wiphy, 298 "Hardware restart was requested\n"); 299 300 /* use this reason, ieee80211_reconfig will unblock it */ 301 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 302 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 303 false); 304 305 /* 306 * Stop all Rx during the reconfig. We don't want state changes 307 * or driver callbacks while this is in progress. 308 */ 309 local->in_reconfig = true; 310 barrier(); 311 312 queue_work(system_freezable_wq, &local->restart_work); 313 } 314 EXPORT_SYMBOL(ieee80211_restart_hw); 315 316 #ifdef CONFIG_INET 317 static int ieee80211_ifa_changed(struct notifier_block *nb, 318 unsigned long data, void *arg) 319 { 320 struct in_ifaddr *ifa = arg; 321 struct ieee80211_local *local = 322 container_of(nb, struct ieee80211_local, 323 ifa_notifier); 324 struct net_device *ndev = ifa->ifa_dev->dev; 325 struct wireless_dev *wdev = ndev->ieee80211_ptr; 326 struct in_device *idev; 327 struct ieee80211_sub_if_data *sdata; 328 struct ieee80211_bss_conf *bss_conf; 329 struct ieee80211_if_managed *ifmgd; 330 int c = 0; 331 332 /* Make sure it's our interface that got changed */ 333 if (!wdev) 334 return NOTIFY_DONE; 335 336 if (wdev->wiphy != local->hw.wiphy) 337 return NOTIFY_DONE; 338 339 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 340 bss_conf = &sdata->vif.bss_conf; 341 342 /* ARP filtering is only supported in managed mode */ 343 if (sdata->vif.type != NL80211_IFTYPE_STATION) 344 return NOTIFY_DONE; 345 346 idev = __in_dev_get_rtnl(sdata->dev); 347 if (!idev) 348 return NOTIFY_DONE; 349 350 ifmgd = &sdata->u.mgd; 351 sdata_lock(sdata); 352 353 /* Copy the addresses to the bss_conf list */ 354 ifa = idev->ifa_list; 355 while (ifa) { 356 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 357 bss_conf->arp_addr_list[c] = ifa->ifa_address; 358 ifa = ifa->ifa_next; 359 c++; 360 } 361 362 bss_conf->arp_addr_cnt = c; 363 364 /* Configure driver only if associated (which also implies it is up) */ 365 if (ifmgd->associated) 366 ieee80211_bss_info_change_notify(sdata, 367 BSS_CHANGED_ARP_FILTER); 368 369 sdata_unlock(sdata); 370 371 return NOTIFY_OK; 372 } 373 #endif 374 375 #if IS_ENABLED(CONFIG_IPV6) 376 static int ieee80211_ifa6_changed(struct notifier_block *nb, 377 unsigned long data, void *arg) 378 { 379 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 380 struct inet6_dev *idev = ifa->idev; 381 struct net_device *ndev = ifa->idev->dev; 382 struct ieee80211_local *local = 383 container_of(nb, struct ieee80211_local, ifa6_notifier); 384 struct wireless_dev *wdev = ndev->ieee80211_ptr; 385 struct ieee80211_sub_if_data *sdata; 386 387 /* Make sure it's our interface that got changed */ 388 if (!wdev || wdev->wiphy != local->hw.wiphy) 389 return NOTIFY_DONE; 390 391 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 392 393 /* 394 * For now only support station mode. This is mostly because 395 * doing AP would have to handle AP_VLAN in some way ... 396 */ 397 if (sdata->vif.type != NL80211_IFTYPE_STATION) 398 return NOTIFY_DONE; 399 400 drv_ipv6_addr_change(local, sdata, idev); 401 402 return NOTIFY_OK; 403 } 404 #endif 405 406 /* There isn't a lot of sense in it, but you can transmit anything you like */ 407 static const struct ieee80211_txrx_stypes 408 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 409 [NL80211_IFTYPE_ADHOC] = { 410 .tx = 0xffff, 411 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 412 BIT(IEEE80211_STYPE_AUTH >> 4) | 413 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 414 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 415 }, 416 [NL80211_IFTYPE_STATION] = { 417 .tx = 0xffff, 418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 420 }, 421 [NL80211_IFTYPE_AP] = { 422 .tx = 0xffff, 423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 426 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 427 BIT(IEEE80211_STYPE_AUTH >> 4) | 428 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 429 BIT(IEEE80211_STYPE_ACTION >> 4), 430 }, 431 [NL80211_IFTYPE_AP_VLAN] = { 432 /* copy AP */ 433 .tx = 0xffff, 434 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 435 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 436 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 437 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 438 BIT(IEEE80211_STYPE_AUTH >> 4) | 439 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 440 BIT(IEEE80211_STYPE_ACTION >> 4), 441 }, 442 [NL80211_IFTYPE_P2P_CLIENT] = { 443 .tx = 0xffff, 444 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 446 }, 447 [NL80211_IFTYPE_P2P_GO] = { 448 .tx = 0xffff, 449 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 450 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 451 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 452 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 453 BIT(IEEE80211_STYPE_AUTH >> 4) | 454 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 455 BIT(IEEE80211_STYPE_ACTION >> 4), 456 }, 457 [NL80211_IFTYPE_MESH_POINT] = { 458 .tx = 0xffff, 459 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 460 BIT(IEEE80211_STYPE_AUTH >> 4) | 461 BIT(IEEE80211_STYPE_DEAUTH >> 4), 462 }, 463 [NL80211_IFTYPE_P2P_DEVICE] = { 464 .tx = 0xffff, 465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 466 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 467 }, 468 }; 469 470 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 471 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 472 IEEE80211_HT_AMPDU_PARM_DENSITY, 473 474 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 475 IEEE80211_HT_CAP_MAX_AMSDU | 476 IEEE80211_HT_CAP_SGI_20 | 477 IEEE80211_HT_CAP_SGI_40 | 478 IEEE80211_HT_CAP_TX_STBC | 479 IEEE80211_HT_CAP_RX_STBC | 480 IEEE80211_HT_CAP_LDPC_CODING | 481 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 482 .mcs = { 483 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 484 0xff, 0xff, 0xff, 0xff, 0xff, }, 485 }, 486 }; 487 488 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 489 .vht_cap_info = 490 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 491 IEEE80211_VHT_CAP_SHORT_GI_80 | 492 IEEE80211_VHT_CAP_SHORT_GI_160 | 493 IEEE80211_VHT_CAP_RXSTBC_MASK | 494 IEEE80211_VHT_CAP_TXSTBC | 495 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 496 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 497 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 498 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 499 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 500 .supp_mcs = { 501 .rx_mcs_map = cpu_to_le16(~0), 502 .tx_mcs_map = cpu_to_le16(~0), 503 }, 504 }; 505 506 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 507 const struct ieee80211_ops *ops, 508 const char *requested_name) 509 { 510 struct ieee80211_local *local; 511 int priv_size, i; 512 struct wiphy *wiphy; 513 bool use_chanctx; 514 515 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 516 !ops->add_interface || !ops->remove_interface || 517 !ops->configure_filter)) 518 return NULL; 519 520 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 521 return NULL; 522 523 /* check all or no channel context operations exist */ 524 i = !!ops->add_chanctx + !!ops->remove_chanctx + 525 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 526 !!ops->unassign_vif_chanctx; 527 if (WARN_ON(i != 0 && i != 5)) 528 return NULL; 529 use_chanctx = i == 5; 530 531 /* Ensure 32-byte alignment of our private data and hw private data. 532 * We use the wiphy priv data for both our ieee80211_local and for 533 * the driver's private data 534 * 535 * In memory it'll be like this: 536 * 537 * +-------------------------+ 538 * | struct wiphy | 539 * +-------------------------+ 540 * | struct ieee80211_local | 541 * +-------------------------+ 542 * | driver's private data | 543 * +-------------------------+ 544 * 545 */ 546 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 547 548 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 549 550 if (!wiphy) 551 return NULL; 552 553 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 554 555 wiphy->privid = mac80211_wiphy_privid; 556 557 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 558 WIPHY_FLAG_4ADDR_AP | 559 WIPHY_FLAG_4ADDR_STATION | 560 WIPHY_FLAG_REPORTS_OBSS | 561 WIPHY_FLAG_OFFCHAN_TX; 562 563 if (ops->remain_on_channel) 564 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 565 566 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 567 NL80211_FEATURE_SAE | 568 NL80211_FEATURE_HT_IBSS | 569 NL80211_FEATURE_VIF_TXPOWER | 570 NL80211_FEATURE_MAC_ON_CREATE | 571 NL80211_FEATURE_USERSPACE_MPM | 572 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 573 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 574 wiphy_ext_feature_set(wiphy, 575 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 576 577 if (!ops->hw_scan) { 578 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 579 NL80211_FEATURE_AP_SCAN; 580 /* 581 * if the driver behaves correctly using the probe request 582 * (template) from mac80211, then both of these should be 583 * supported even with hw scan - but let drivers opt in. 584 */ 585 wiphy_ext_feature_set(wiphy, 586 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 587 wiphy_ext_feature_set(wiphy, 588 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 589 } 590 591 if (!ops->set_key) 592 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 593 594 if (ops->wake_tx_queue) 595 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 596 597 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 598 599 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 600 601 local = wiphy_priv(wiphy); 602 603 if (sta_info_init(local)) 604 goto err_free; 605 606 local->hw.wiphy = wiphy; 607 608 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 609 610 local->ops = ops; 611 local->use_chanctx = use_chanctx; 612 613 /* 614 * We need a bit of data queued to build aggregates properly, so 615 * instruct the TCP stack to allow more than a single ms of data 616 * to be queued in the stack. The value is a bit-shift of 1 617 * second, so 7 is ~8ms of queued data. Only affects local TCP 618 * sockets. 619 * This is the default, anyhow - drivers may need to override it 620 * for local reasons (longer buffers, longer completion time, or 621 * similar). 622 */ 623 local->hw.tx_sk_pacing_shift = 7; 624 625 /* set up some defaults */ 626 local->hw.queues = 1; 627 local->hw.max_rates = 1; 628 local->hw.max_report_rates = 0; 629 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 630 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 631 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 632 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 633 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 634 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 635 IEEE80211_RADIOTAP_MCS_HAVE_GI | 636 IEEE80211_RADIOTAP_MCS_HAVE_BW; 637 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 638 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 639 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 640 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 641 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 642 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 643 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 644 645 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 646 647 wiphy->extended_capabilities = local->ext_capa; 648 wiphy->extended_capabilities_mask = local->ext_capa; 649 wiphy->extended_capabilities_len = 650 ARRAY_SIZE(local->ext_capa); 651 652 INIT_LIST_HEAD(&local->interfaces); 653 INIT_LIST_HEAD(&local->mon_list); 654 655 __hw_addr_init(&local->mc_list); 656 657 mutex_init(&local->iflist_mtx); 658 mutex_init(&local->mtx); 659 660 mutex_init(&local->key_mtx); 661 spin_lock_init(&local->filter_lock); 662 spin_lock_init(&local->rx_path_lock); 663 spin_lock_init(&local->queue_stop_reason_lock); 664 665 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 666 INIT_LIST_HEAD(&local->active_txqs[i]); 667 spin_lock_init(&local->active_txq_lock[i]); 668 } 669 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 670 671 INIT_LIST_HEAD(&local->chanctx_list); 672 mutex_init(&local->chanctx_mtx); 673 674 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 675 676 INIT_WORK(&local->restart_work, ieee80211_restart_work); 677 678 INIT_WORK(&local->radar_detected_work, 679 ieee80211_dfs_radar_detected_work); 680 681 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 682 local->smps_mode = IEEE80211_SMPS_OFF; 683 684 INIT_WORK(&local->dynamic_ps_enable_work, 685 ieee80211_dynamic_ps_enable_work); 686 INIT_WORK(&local->dynamic_ps_disable_work, 687 ieee80211_dynamic_ps_disable_work); 688 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 689 690 INIT_WORK(&local->sched_scan_stopped_work, 691 ieee80211_sched_scan_stopped_work); 692 693 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 694 695 spin_lock_init(&local->ack_status_lock); 696 idr_init(&local->ack_status_frames); 697 698 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 699 skb_queue_head_init(&local->pending[i]); 700 atomic_set(&local->agg_queue_stop[i], 0); 701 } 702 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 703 (unsigned long)local); 704 705 if (ops->wake_tx_queue) 706 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs, 707 (unsigned long)local); 708 709 tasklet_init(&local->tasklet, 710 ieee80211_tasklet_handler, 711 (unsigned long) local); 712 713 skb_queue_head_init(&local->skb_queue); 714 skb_queue_head_init(&local->skb_queue_unreliable); 715 skb_queue_head_init(&local->skb_queue_tdls_chsw); 716 717 ieee80211_alloc_led_names(local); 718 719 ieee80211_roc_setup(local); 720 721 local->hw.radiotap_timestamp.units_pos = -1; 722 local->hw.radiotap_timestamp.accuracy = -1; 723 724 return &local->hw; 725 err_free: 726 wiphy_free(wiphy); 727 return NULL; 728 } 729 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 730 731 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 732 { 733 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 734 IS_ERR(local->wep_rx_tfm)); 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 ieee80211_wep_free(local); 1302 fail_flows: 1303 destroy_workqueue(local->workqueue); 1304 fail_workqueue: 1305 wiphy_unregister(local->hw.wiphy); 1306 fail_wiphy_register: 1307 if (local->wiphy_ciphers_allocated) 1308 kfree(local->hw.wiphy->cipher_suites); 1309 kfree(local->int_scan_req); 1310 return result; 1311 } 1312 EXPORT_SYMBOL(ieee80211_register_hw); 1313 1314 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1315 { 1316 struct ieee80211_local *local = hw_to_local(hw); 1317 1318 tasklet_kill(&local->tx_pending_tasklet); 1319 tasklet_kill(&local->tasklet); 1320 1321 #ifdef CONFIG_INET 1322 unregister_inetaddr_notifier(&local->ifa_notifier); 1323 #endif 1324 #if IS_ENABLED(CONFIG_IPV6) 1325 unregister_inet6addr_notifier(&local->ifa6_notifier); 1326 #endif 1327 1328 rtnl_lock(); 1329 1330 /* 1331 * At this point, interface list manipulations are fine 1332 * because the driver cannot be handing us frames any 1333 * more and the tasklet is killed. 1334 */ 1335 ieee80211_remove_interfaces(local); 1336 1337 rtnl_unlock(); 1338 1339 cancel_delayed_work_sync(&local->roc_work); 1340 cancel_work_sync(&local->restart_work); 1341 cancel_work_sync(&local->reconfig_filter); 1342 cancel_work_sync(&local->tdls_chsw_work); 1343 flush_work(&local->sched_scan_stopped_work); 1344 flush_work(&local->radar_detected_work); 1345 1346 ieee80211_clear_tx_pending(local); 1347 rate_control_deinitialize(local); 1348 1349 if (skb_queue_len(&local->skb_queue) || 1350 skb_queue_len(&local->skb_queue_unreliable)) 1351 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1352 skb_queue_purge(&local->skb_queue); 1353 skb_queue_purge(&local->skb_queue_unreliable); 1354 skb_queue_purge(&local->skb_queue_tdls_chsw); 1355 1356 destroy_workqueue(local->workqueue); 1357 wiphy_unregister(local->hw.wiphy); 1358 ieee80211_wep_free(local); 1359 ieee80211_led_exit(local); 1360 kfree(local->int_scan_req); 1361 } 1362 EXPORT_SYMBOL(ieee80211_unregister_hw); 1363 1364 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1365 { 1366 WARN_ONCE(1, "Have pending ack frames!\n"); 1367 kfree_skb(p); 1368 return 0; 1369 } 1370 1371 void ieee80211_free_hw(struct ieee80211_hw *hw) 1372 { 1373 struct ieee80211_local *local = hw_to_local(hw); 1374 enum nl80211_band band; 1375 1376 mutex_destroy(&local->iflist_mtx); 1377 mutex_destroy(&local->mtx); 1378 1379 if (local->wiphy_ciphers_allocated) 1380 kfree(local->hw.wiphy->cipher_suites); 1381 1382 idr_for_each(&local->ack_status_frames, 1383 ieee80211_free_ack_frame, NULL); 1384 idr_destroy(&local->ack_status_frames); 1385 1386 sta_info_stop(local); 1387 1388 ieee80211_free_led_names(local); 1389 1390 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1391 if (!(local->sband_allocated & BIT(band))) 1392 continue; 1393 kfree(local->hw.wiphy->bands[band]); 1394 } 1395 1396 wiphy_free(local->hw.wiphy); 1397 } 1398 EXPORT_SYMBOL(ieee80211_free_hw); 1399 1400 static int __init ieee80211_init(void) 1401 { 1402 struct sk_buff *skb; 1403 int ret; 1404 1405 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1406 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1407 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1408 1409 ret = rc80211_minstrel_init(); 1410 if (ret) 1411 return ret; 1412 1413 ret = ieee80211_iface_init(); 1414 if (ret) 1415 goto err_netdev; 1416 1417 return 0; 1418 err_netdev: 1419 rc80211_minstrel_exit(); 1420 1421 return ret; 1422 } 1423 1424 static void __exit ieee80211_exit(void) 1425 { 1426 rc80211_minstrel_exit(); 1427 1428 ieee80211s_stop(); 1429 1430 ieee80211_iface_exit(); 1431 1432 rcu_barrier(); 1433 } 1434 1435 1436 subsys_initcall(ieee80211_init); 1437 module_exit(ieee80211_exit); 1438 1439 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1440 MODULE_LICENSE("GPL"); 1441