main.c revision dd5ecfeac8d1a96d0aba6bbcaec431756f8d8854
1/* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 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/pm_qos.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 "cfg.h" 35#include "debugfs.h" 36 37void ieee80211_configure_filter(struct ieee80211_local *local) 38{ 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_promiscs)) 44 new_flags |= FIF_PROMISC_IN_BSS; 45 46 if (atomic_read(&local->iff_allmultis)) 47 new_flags |= FIF_ALLMULTI; 48 49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 51 new_flags |= FIF_BCN_PRBRESP_PROMISC; 52 53 if (local->fif_probe_req || local->probe_req_reg) 54 new_flags |= FIF_PROBE_REQ; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85} 86 87static void ieee80211_reconfig_filter(struct work_struct *work) 88{ 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93} 94 95static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96{ 97 struct ieee80211_sub_if_data *sdata; 98 struct ieee80211_channel *chan; 99 u32 changed = 0; 100 int power; 101 enum nl80211_channel_type channel_type; 102 u32 offchannel_flag; 103 bool scanning = false; 104 105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 106 if (local->scan_channel) { 107 chan = local->scan_channel; 108 /* If scanning on oper channel, use whatever channel-type 109 * is currently in use. 110 */ 111 if (chan == local->_oper_channel) 112 channel_type = local->_oper_channel_type; 113 else 114 channel_type = NL80211_CHAN_NO_HT; 115 } else if (local->tmp_channel) { 116 chan = local->tmp_channel; 117 channel_type = NL80211_CHAN_NO_HT; 118 } else { 119 chan = local->_oper_channel; 120 channel_type = local->_oper_channel_type; 121 } 122 123 if (chan != local->_oper_channel || 124 channel_type != local->_oper_channel_type) 125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 126 else 127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 128 129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 130 131 if (offchannel_flag || chan != local->hw.conf.channel || 132 channel_type != local->hw.conf.channel_type) { 133 local->hw.conf.channel = chan; 134 local->hw.conf.channel_type = channel_type; 135 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 136 } 137 138 if (!conf_is_ht(&local->hw.conf)) { 139 /* 140 * mac80211.h documents that this is only valid 141 * when the channel is set to an HT type, and 142 * that otherwise STATIC is used. 143 */ 144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 145 } else if (local->hw.conf.smps_mode != local->smps_mode) { 146 local->hw.conf.smps_mode = local->smps_mode; 147 changed |= IEEE80211_CONF_CHANGE_SMPS; 148 } 149 150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) || 152 test_bit(SCAN_HW_SCANNING, &local->scanning); 153 power = chan->max_power; 154 155 rcu_read_lock(); 156 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 157 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 158 continue; 159 power = min(power, sdata->vif.bss_conf.txpower); 160 } 161 rcu_read_unlock(); 162 163 if (local->hw.conf.power_level != power) { 164 changed |= IEEE80211_CONF_CHANGE_POWER; 165 local->hw.conf.power_level = power; 166 } 167 168 return changed; 169} 170 171int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 172{ 173 int ret = 0; 174 175 might_sleep(); 176 177 if (!local->use_chanctx) 178 changed |= ieee80211_hw_conf_chan(local); 179 else 180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 181 IEEE80211_CONF_CHANGE_POWER); 182 183 if (changed && local->open_count) { 184 ret = drv_config(local, changed); 185 /* 186 * Goal: 187 * HW reconfiguration should never fail, the driver has told 188 * us what it can support so it should live up to that promise. 189 * 190 * Current status: 191 * rfkill is not integrated with mac80211 and a 192 * configuration command can thus fail if hardware rfkill 193 * is enabled 194 * 195 * FIXME: integrate rfkill with mac80211 and then add this 196 * WARN_ON() back 197 * 198 */ 199 /* WARN_ON(ret); */ 200 } 201 202 return ret; 203} 204 205void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 206 u32 changed) 207{ 208 struct ieee80211_local *local = sdata->local; 209 210 if (!changed) 211 return; 212 213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 214} 215 216u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 217{ 218 sdata->vif.bss_conf.use_cts_prot = false; 219 sdata->vif.bss_conf.use_short_preamble = false; 220 sdata->vif.bss_conf.use_short_slot = false; 221 return BSS_CHANGED_ERP_CTS_PROT | 222 BSS_CHANGED_ERP_PREAMBLE | 223 BSS_CHANGED_ERP_SLOT; 224} 225 226static void ieee80211_tasklet_handler(unsigned long data) 227{ 228 struct ieee80211_local *local = (struct ieee80211_local *) data; 229 struct sta_info *sta, *tmp; 230 struct skb_eosp_msg_data *eosp_data; 231 struct sk_buff *skb; 232 233 while ((skb = skb_dequeue(&local->skb_queue)) || 234 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 235 switch (skb->pkt_type) { 236 case IEEE80211_RX_MSG: 237 /* Clear skb->pkt_type in order to not confuse kernel 238 * netstack. */ 239 skb->pkt_type = 0; 240 ieee80211_rx(&local->hw, skb); 241 break; 242 case IEEE80211_TX_STATUS_MSG: 243 skb->pkt_type = 0; 244 ieee80211_tx_status(&local->hw, skb); 245 break; 246 case IEEE80211_EOSP_MSG: 247 eosp_data = (void *)skb->cb; 248 for_each_sta_info(local, eosp_data->sta, sta, tmp) { 249 /* skip wrong virtual interface */ 250 if (memcmp(eosp_data->iface, 251 sta->sdata->vif.addr, ETH_ALEN)) 252 continue; 253 clear_sta_flag(sta, WLAN_STA_SP); 254 break; 255 } 256 dev_kfree_skb(skb); 257 break; 258 default: 259 WARN(1, "mac80211: Packet is of unknown type %d\n", 260 skb->pkt_type); 261 dev_kfree_skb(skb); 262 break; 263 } 264 } 265} 266 267static void ieee80211_restart_work(struct work_struct *work) 268{ 269 struct ieee80211_local *local = 270 container_of(work, struct ieee80211_local, restart_work); 271 272 /* wait for scan work complete */ 273 flush_workqueue(local->workqueue); 274 275 mutex_lock(&local->mtx); 276 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 277 rcu_dereference_protected(local->sched_scan_sdata, 278 lockdep_is_held(&local->mtx)), 279 "%s called with hardware scan in progress\n", __func__); 280 mutex_unlock(&local->mtx); 281 282 rtnl_lock(); 283 ieee80211_scan_cancel(local); 284 ieee80211_reconfig(local); 285 rtnl_unlock(); 286} 287 288void ieee80211_restart_hw(struct ieee80211_hw *hw) 289{ 290 struct ieee80211_local *local = hw_to_local(hw); 291 292 trace_api_restart_hw(local); 293 294 wiphy_info(hw->wiphy, 295 "Hardware restart was requested\n"); 296 297 /* use this reason, ieee80211_reconfig will unblock it */ 298 ieee80211_stop_queues_by_reason(hw, 299 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 300 301 /* 302 * Stop all Rx during the reconfig. We don't want state changes 303 * or driver callbacks while this is in progress. 304 */ 305 local->in_reconfig = true; 306 barrier(); 307 308 schedule_work(&local->restart_work); 309} 310EXPORT_SYMBOL(ieee80211_restart_hw); 311 312#ifdef CONFIG_INET 313static int ieee80211_ifa_changed(struct notifier_block *nb, 314 unsigned long data, void *arg) 315{ 316 struct in_ifaddr *ifa = arg; 317 struct ieee80211_local *local = 318 container_of(nb, struct ieee80211_local, 319 ifa_notifier); 320 struct net_device *ndev = ifa->ifa_dev->dev; 321 struct wireless_dev *wdev = ndev->ieee80211_ptr; 322 struct in_device *idev; 323 struct ieee80211_sub_if_data *sdata; 324 struct ieee80211_bss_conf *bss_conf; 325 struct ieee80211_if_managed *ifmgd; 326 int c = 0; 327 328 /* Make sure it's our interface that got changed */ 329 if (!wdev) 330 return NOTIFY_DONE; 331 332 if (wdev->wiphy != local->hw.wiphy) 333 return NOTIFY_DONE; 334 335 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 336 bss_conf = &sdata->vif.bss_conf; 337 338 /* ARP filtering is only supported in managed mode */ 339 if (sdata->vif.type != NL80211_IFTYPE_STATION) 340 return NOTIFY_DONE; 341 342 idev = __in_dev_get_rtnl(sdata->dev); 343 if (!idev) 344 return NOTIFY_DONE; 345 346 ifmgd = &sdata->u.mgd; 347 mutex_lock(&ifmgd->mtx); 348 349 /* Copy the addresses to the bss_conf list */ 350 ifa = idev->ifa_list; 351 while (ifa) { 352 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 353 bss_conf->arp_addr_list[c] = ifa->ifa_address; 354 ifa = ifa->ifa_next; 355 c++; 356 } 357 358 bss_conf->arp_addr_cnt = c; 359 360 /* Configure driver only if associated (which also implies it is up) */ 361 if (ifmgd->associated) 362 ieee80211_bss_info_change_notify(sdata, 363 BSS_CHANGED_ARP_FILTER); 364 365 mutex_unlock(&ifmgd->mtx); 366 367 return NOTIFY_DONE; 368} 369#endif 370 371#if IS_ENABLED(CONFIG_IPV6) 372static int ieee80211_ifa6_changed(struct notifier_block *nb, 373 unsigned long data, void *arg) 374{ 375 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 376 struct inet6_dev *idev = ifa->idev; 377 struct net_device *ndev = ifa->idev->dev; 378 struct ieee80211_local *local = 379 container_of(nb, struct ieee80211_local, ifa6_notifier); 380 struct wireless_dev *wdev = ndev->ieee80211_ptr; 381 struct ieee80211_sub_if_data *sdata; 382 383 /* Make sure it's our interface that got changed */ 384 if (!wdev || wdev->wiphy != local->hw.wiphy) 385 return NOTIFY_DONE; 386 387 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 388 389 /* 390 * For now only support station mode. This is mostly because 391 * doing AP would have to handle AP_VLAN in some way ... 392 */ 393 if (sdata->vif.type != NL80211_IFTYPE_STATION) 394 return NOTIFY_DONE; 395 396 drv_ipv6_addr_change(local, sdata, idev); 397 398 return NOTIFY_DONE; 399} 400#endif 401 402static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 403{ 404 struct ieee80211_local *local = 405 container_of(napi, struct ieee80211_local, napi); 406 407 return local->ops->napi_poll(&local->hw, budget); 408} 409 410void ieee80211_napi_schedule(struct ieee80211_hw *hw) 411{ 412 struct ieee80211_local *local = hw_to_local(hw); 413 414 napi_schedule(&local->napi); 415} 416EXPORT_SYMBOL(ieee80211_napi_schedule); 417 418void ieee80211_napi_complete(struct ieee80211_hw *hw) 419{ 420 struct ieee80211_local *local = hw_to_local(hw); 421 422 napi_complete(&local->napi); 423} 424EXPORT_SYMBOL(ieee80211_napi_complete); 425 426/* There isn't a lot of sense in it, but you can transmit anything you like */ 427static const struct ieee80211_txrx_stypes 428ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 429 [NL80211_IFTYPE_ADHOC] = { 430 .tx = 0xffff, 431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 432 BIT(IEEE80211_STYPE_AUTH >> 4) | 433 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 434 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 435 }, 436 [NL80211_IFTYPE_STATION] = { 437 .tx = 0xffff, 438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 440 }, 441 [NL80211_IFTYPE_AP] = { 442 .tx = 0xffff, 443 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 444 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 446 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 447 BIT(IEEE80211_STYPE_AUTH >> 4) | 448 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 449 BIT(IEEE80211_STYPE_ACTION >> 4), 450 }, 451 [NL80211_IFTYPE_AP_VLAN] = { 452 /* copy AP */ 453 .tx = 0xffff, 454 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 455 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 457 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 458 BIT(IEEE80211_STYPE_AUTH >> 4) | 459 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 460 BIT(IEEE80211_STYPE_ACTION >> 4), 461 }, 462 [NL80211_IFTYPE_P2P_CLIENT] = { 463 .tx = 0xffff, 464 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 465 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 466 }, 467 [NL80211_IFTYPE_P2P_GO] = { 468 .tx = 0xffff, 469 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 470 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 472 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 473 BIT(IEEE80211_STYPE_AUTH >> 4) | 474 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 475 BIT(IEEE80211_STYPE_ACTION >> 4), 476 }, 477 [NL80211_IFTYPE_MESH_POINT] = { 478 .tx = 0xffff, 479 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 480 BIT(IEEE80211_STYPE_AUTH >> 4) | 481 BIT(IEEE80211_STYPE_DEAUTH >> 4), 482 }, 483 [NL80211_IFTYPE_P2P_DEVICE] = { 484 .tx = 0xffff, 485 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 486 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 487 }, 488}; 489 490static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 491 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 492 IEEE80211_HT_AMPDU_PARM_DENSITY, 493 494 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 495 IEEE80211_HT_CAP_MAX_AMSDU | 496 IEEE80211_HT_CAP_SGI_20 | 497 IEEE80211_HT_CAP_SGI_40), 498 .mcs = { 499 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 500 0xff, 0xff, 0xff, 0xff, 0xff, }, 501 }, 502}; 503 504static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 505 .vht_cap_info = 506 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 507 IEEE80211_VHT_CAP_SHORT_GI_80 | 508 IEEE80211_VHT_CAP_SHORT_GI_160 | 509 IEEE80211_VHT_CAP_RXSTBC_1 | 510 IEEE80211_VHT_CAP_RXSTBC_2 | 511 IEEE80211_VHT_CAP_RXSTBC_3 | 512 IEEE80211_VHT_CAP_RXSTBC_4 | 513 IEEE80211_VHT_CAP_TXSTBC | 514 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 515 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 516 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 517 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 518 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 519 .supp_mcs = { 520 .rx_mcs_map = cpu_to_le16(~0), 521 .tx_mcs_map = cpu_to_le16(~0), 522 }, 523}; 524 525static const u8 extended_capabilities[] = { 526 0, 0, 0, 0, 0, 0, 0, 527 WLAN_EXT_CAPA8_OPMODE_NOTIF, 528}; 529 530struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 531 const struct ieee80211_ops *ops) 532{ 533 struct ieee80211_local *local; 534 int priv_size, i; 535 struct wiphy *wiphy; 536 bool use_chanctx; 537 538 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 539 !ops->add_interface || !ops->remove_interface || 540 !ops->configure_filter)) 541 return NULL; 542 543 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 544 return NULL; 545 546 /* check all or no channel context operations exist */ 547 i = !!ops->add_chanctx + !!ops->remove_chanctx + 548 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 549 !!ops->unassign_vif_chanctx; 550 if (WARN_ON(i != 0 && i != 5)) 551 return NULL; 552 use_chanctx = i == 5; 553 554 /* Ensure 32-byte alignment of our private data and hw private data. 555 * We use the wiphy priv data for both our ieee80211_local and for 556 * the driver's private data 557 * 558 * In memory it'll be like this: 559 * 560 * +-------------------------+ 561 * | struct wiphy | 562 * +-------------------------+ 563 * | struct ieee80211_local | 564 * +-------------------------+ 565 * | driver's private data | 566 * +-------------------------+ 567 * 568 */ 569 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 570 571 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 572 573 if (!wiphy) 574 return NULL; 575 576 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 577 578 wiphy->privid = mac80211_wiphy_privid; 579 580 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 581 WIPHY_FLAG_4ADDR_AP | 582 WIPHY_FLAG_4ADDR_STATION | 583 WIPHY_FLAG_REPORTS_OBSS | 584 WIPHY_FLAG_OFFCHAN_TX; 585 586 wiphy->extended_capabilities = extended_capabilities; 587 wiphy->extended_capabilities_mask = extended_capabilities; 588 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 589 590 if (ops->remain_on_channel) 591 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 592 593 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 594 NL80211_FEATURE_SAE | 595 NL80211_FEATURE_HT_IBSS | 596 NL80211_FEATURE_VIF_TXPOWER; 597 598 if (!ops->hw_scan) 599 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 600 NL80211_FEATURE_AP_SCAN; 601 602 603 if (!ops->set_key) 604 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 605 606 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 607 608 local = wiphy_priv(wiphy); 609 610 local->hw.wiphy = wiphy; 611 612 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 613 614 local->ops = ops; 615 local->use_chanctx = use_chanctx; 616 617 /* set up some defaults */ 618 local->hw.queues = 1; 619 local->hw.max_rates = 1; 620 local->hw.max_report_rates = 0; 621 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 622 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 623 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 624 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 625 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 626 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 627 IEEE80211_RADIOTAP_MCS_HAVE_GI | 628 IEEE80211_RADIOTAP_MCS_HAVE_BW; 629 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 630 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 631 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 632 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 633 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 634 635 INIT_LIST_HEAD(&local->interfaces); 636 637 __hw_addr_init(&local->mc_list); 638 639 mutex_init(&local->iflist_mtx); 640 mutex_init(&local->mtx); 641 642 mutex_init(&local->key_mtx); 643 spin_lock_init(&local->filter_lock); 644 spin_lock_init(&local->rx_path_lock); 645 spin_lock_init(&local->queue_stop_reason_lock); 646 647 INIT_LIST_HEAD(&local->chanctx_list); 648 mutex_init(&local->chanctx_mtx); 649 650 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 651 652 INIT_WORK(&local->restart_work, ieee80211_restart_work); 653 654 INIT_WORK(&local->radar_detected_work, 655 ieee80211_dfs_radar_detected_work); 656 657 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 658 local->smps_mode = IEEE80211_SMPS_OFF; 659 660 INIT_WORK(&local->dynamic_ps_enable_work, 661 ieee80211_dynamic_ps_enable_work); 662 INIT_WORK(&local->dynamic_ps_disable_work, 663 ieee80211_dynamic_ps_disable_work); 664 setup_timer(&local->dynamic_ps_timer, 665 ieee80211_dynamic_ps_timer, (unsigned long) local); 666 667 INIT_WORK(&local->sched_scan_stopped_work, 668 ieee80211_sched_scan_stopped_work); 669 670 spin_lock_init(&local->ack_status_lock); 671 idr_init(&local->ack_status_frames); 672 673 sta_info_init(local); 674 675 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 676 skb_queue_head_init(&local->pending[i]); 677 atomic_set(&local->agg_queue_stop[i], 0); 678 } 679 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 680 (unsigned long)local); 681 682 tasklet_init(&local->tasklet, 683 ieee80211_tasklet_handler, 684 (unsigned long) local); 685 686 skb_queue_head_init(&local->skb_queue); 687 skb_queue_head_init(&local->skb_queue_unreliable); 688 689 /* init dummy netdev for use w/ NAPI */ 690 init_dummy_netdev(&local->napi_dev); 691 692 ieee80211_led_names(local); 693 694 ieee80211_roc_setup(local); 695 696 return &local->hw; 697} 698EXPORT_SYMBOL(ieee80211_alloc_hw); 699 700int ieee80211_register_hw(struct ieee80211_hw *hw) 701{ 702 struct ieee80211_local *local = hw_to_local(hw); 703 int result, i; 704 enum ieee80211_band band; 705 int channels, max_bitrates; 706 bool supp_ht, supp_vht; 707 netdev_features_t feature_whitelist; 708 static const u32 cipher_suites[] = { 709 /* keep WEP first, it may be removed below */ 710 WLAN_CIPHER_SUITE_WEP40, 711 WLAN_CIPHER_SUITE_WEP104, 712 WLAN_CIPHER_SUITE_TKIP, 713 WLAN_CIPHER_SUITE_CCMP, 714 715 /* keep last -- depends on hw flags! */ 716 WLAN_CIPHER_SUITE_AES_CMAC 717 }; 718 719 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 720 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 721 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 722 return -EINVAL; 723 724#ifdef CONFIG_PM 725 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 726 (!local->ops->suspend || !local->ops->resume)) 727 return -EINVAL; 728#endif 729 730 if (!local->use_chanctx) { 731 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 732 const struct ieee80211_iface_combination *comb; 733 734 comb = &local->hw.wiphy->iface_combinations[i]; 735 736 if (comb->num_different_channels > 1) 737 return -EINVAL; 738 } 739 } else { 740 /* 741 * WDS is currently prohibited when channel contexts are used 742 * because there's no clear definition of which channel WDS 743 * type interfaces use 744 */ 745 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 746 return -EINVAL; 747 748 /* DFS currently not supported with channel context drivers */ 749 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 750 const struct ieee80211_iface_combination *comb; 751 752 comb = &local->hw.wiphy->iface_combinations[i]; 753 754 if (comb->radar_detect_widths) 755 return -EINVAL; 756 } 757 } 758 759 /* Only HW csum features are currently compatible with mac80211 */ 760 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 761 NETIF_F_HW_CSUM; 762 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 763 return -EINVAL; 764 765 if (hw->max_report_rates == 0) 766 hw->max_report_rates = hw->max_rates; 767 768 local->rx_chains = 1; 769 770 /* 771 * generic code guarantees at least one band, 772 * set this very early because much code assumes 773 * that hw.conf.channel is assigned 774 */ 775 channels = 0; 776 max_bitrates = 0; 777 supp_ht = false; 778 supp_vht = false; 779 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 780 struct ieee80211_supported_band *sband; 781 782 sband = local->hw.wiphy->bands[band]; 783 if (!sband) 784 continue; 785 if (!local->use_chanctx && !local->_oper_channel) { 786 /* init channel we're on */ 787 local->hw.conf.channel = 788 local->_oper_channel = &sband->channels[0]; 789 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 790 } 791 cfg80211_chandef_create(&local->monitor_chandef, 792 &sband->channels[0], 793 NL80211_CHAN_NO_HT); 794 channels += sband->n_channels; 795 796 if (max_bitrates < sband->n_bitrates) 797 max_bitrates = sband->n_bitrates; 798 supp_ht = supp_ht || sband->ht_cap.ht_supported; 799 supp_vht = supp_vht || sband->vht_cap.vht_supported; 800 801 if (sband->ht_cap.ht_supported) 802 local->rx_chains = 803 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 804 local->rx_chains); 805 806 /* TODO: consider VHT for RX chains, hopefully it's the same */ 807 } 808 809 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 810 sizeof(void *) * channels, GFP_KERNEL); 811 if (!local->int_scan_req) 812 return -ENOMEM; 813 814 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 815 if (!local->hw.wiphy->bands[band]) 816 continue; 817 local->int_scan_req->rates[band] = (u32) -1; 818 } 819 820 /* if low-level driver supports AP, we also support VLAN */ 821 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 822 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 823 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 824 } 825 826 /* mac80211 always supports monitor */ 827 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 828 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 829 830 /* mac80211 doesn't support more than one IBSS interface right now */ 831 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 832 const struct ieee80211_iface_combination *c; 833 int j; 834 835 c = &hw->wiphy->iface_combinations[i]; 836 837 for (j = 0; j < c->n_limits; j++) 838 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 839 c->limits[j].max > 1) 840 return -EINVAL; 841 } 842 843#ifndef CONFIG_MAC80211_MESH 844 /* mesh depends on Kconfig, but drivers should set it if they want */ 845 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 846#endif 847 848 /* if the underlying driver supports mesh, mac80211 will (at least) 849 * provide routing of mesh authentication frames to userspace */ 850 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 851 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 852 853 /* mac80211 supports control port protocol changing */ 854 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 855 856 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 857 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 858 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 859 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 860 861 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 862 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 863 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 864 865 /* 866 * Calculate scan IE length -- we need this to alloc 867 * memory and to subtract from the driver limit. It 868 * includes the DS Params, (extended) supported rates, and HT 869 * information -- SSID is the driver's responsibility. 870 */ 871 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 872 3 /* DS Params */; 873 if (supp_ht) 874 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 875 876 if (supp_vht) { 877 local->scan_ies_len += 878 2 + sizeof(struct ieee80211_vht_cap); 879 880 /* 881 * (for now at least), drivers wanting to use VHT must 882 * support channel contexts, as they contain all the 883 * necessary VHT information and the global hw config 884 * doesn't (yet) 885 */ 886 if (WARN_ON(!local->use_chanctx)) { 887 result = -EINVAL; 888 goto fail_wiphy_register; 889 } 890 } 891 892 if (!local->ops->hw_scan) { 893 /* For hw_scan, driver needs to set these up. */ 894 local->hw.wiphy->max_scan_ssids = 4; 895 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 896 } 897 898 /* 899 * If the driver supports any scan IEs, then assume the 900 * limit includes the IEs mac80211 will add, otherwise 901 * leave it at zero and let the driver sort it out; we 902 * still pass our IEs to the driver but userspace will 903 * not be allowed to in that case. 904 */ 905 if (local->hw.wiphy->max_scan_ie_len) 906 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 907 908 /* Set up cipher suites unless driver already did */ 909 if (!local->hw.wiphy->cipher_suites) { 910 local->hw.wiphy->cipher_suites = cipher_suites; 911 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 912 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 913 local->hw.wiphy->n_cipher_suites--; 914 } 915 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 916 if (local->hw.wiphy->cipher_suites == cipher_suites) { 917 local->hw.wiphy->cipher_suites += 2; 918 local->hw.wiphy->n_cipher_suites -= 2; 919 } else { 920 u32 *suites; 921 int r, w = 0; 922 923 /* Filter out WEP */ 924 925 suites = kmemdup( 926 local->hw.wiphy->cipher_suites, 927 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 928 GFP_KERNEL); 929 if (!suites) { 930 result = -ENOMEM; 931 goto fail_wiphy_register; 932 } 933 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 934 u32 suite = local->hw.wiphy->cipher_suites[r]; 935 if (suite == WLAN_CIPHER_SUITE_WEP40 || 936 suite == WLAN_CIPHER_SUITE_WEP104) 937 continue; 938 suites[w++] = suite; 939 } 940 local->hw.wiphy->cipher_suites = suites; 941 local->hw.wiphy->n_cipher_suites = w; 942 local->wiphy_ciphers_allocated = true; 943 } 944 } 945 946 if (!local->ops->remain_on_channel) 947 local->hw.wiphy->max_remain_on_channel_duration = 5000; 948 949 if (local->ops->sched_scan_start) 950 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 951 952 /* mac80211 based drivers don't support internal TDLS setup */ 953 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 954 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 955 956 result = wiphy_register(local->hw.wiphy); 957 if (result < 0) 958 goto fail_wiphy_register; 959 960 /* 961 * We use the number of queues for feature tests (QoS, HT) internally 962 * so restrict them appropriately. 963 */ 964 if (hw->queues > IEEE80211_MAX_QUEUES) 965 hw->queues = IEEE80211_MAX_QUEUES; 966 967 local->workqueue = 968 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 969 if (!local->workqueue) { 970 result = -ENOMEM; 971 goto fail_workqueue; 972 } 973 974 /* 975 * The hardware needs headroom for sending the frame, 976 * and we need some headroom for passing the frame to monitor 977 * interfaces, but never both at the same time. 978 */ 979 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 980 IEEE80211_TX_STATUS_HEADROOM); 981 982 debugfs_hw_add(local); 983 984 /* 985 * if the driver doesn't specify a max listen interval we 986 * use 5 which should be a safe default 987 */ 988 if (local->hw.max_listen_interval == 0) 989 local->hw.max_listen_interval = 5; 990 991 local->hw.conf.listen_interval = local->hw.max_listen_interval; 992 993 local->dynamic_ps_forced_timeout = -1; 994 995 result = ieee80211_wep_init(local); 996 if (result < 0) 997 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 998 result); 999 1000 ieee80211_led_init(local); 1001 1002 rtnl_lock(); 1003 1004 result = ieee80211_init_rate_ctrl_alg(local, 1005 hw->rate_control_algorithm); 1006 if (result < 0) { 1007 wiphy_debug(local->hw.wiphy, 1008 "Failed to initialize rate control algorithm\n"); 1009 goto fail_rate; 1010 } 1011 1012 /* add one default STA interface if supported */ 1013 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 1014 result = ieee80211_if_add(local, "wlan%d", NULL, 1015 NL80211_IFTYPE_STATION, NULL); 1016 if (result) 1017 wiphy_warn(local->hw.wiphy, 1018 "Failed to add default virtual iface\n"); 1019 } 1020 1021 rtnl_unlock(); 1022 1023 local->network_latency_notifier.notifier_call = 1024 ieee80211_max_network_latency; 1025 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1026 &local->network_latency_notifier); 1027 if (result) { 1028 rtnl_lock(); 1029 goto fail_pm_qos; 1030 } 1031 1032#ifdef CONFIG_INET 1033 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1034 result = register_inetaddr_notifier(&local->ifa_notifier); 1035 if (result) 1036 goto fail_ifa; 1037#endif 1038 1039#if IS_ENABLED(CONFIG_IPV6) 1040 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1041 result = register_inet6addr_notifier(&local->ifa6_notifier); 1042 if (result) 1043 goto fail_ifa6; 1044#endif 1045 1046 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 1047 local->hw.napi_weight); 1048 1049 return 0; 1050 1051#if IS_ENABLED(CONFIG_IPV6) 1052 fail_ifa6: 1053#ifdef CONFIG_INET 1054 unregister_inetaddr_notifier(&local->ifa_notifier); 1055#endif 1056#endif 1057#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1058 fail_ifa: 1059 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1060 &local->network_latency_notifier); 1061 rtnl_lock(); 1062#endif 1063 fail_pm_qos: 1064 ieee80211_led_exit(local); 1065 ieee80211_remove_interfaces(local); 1066 fail_rate: 1067 rtnl_unlock(); 1068 ieee80211_wep_free(local); 1069 sta_info_stop(local); 1070 destroy_workqueue(local->workqueue); 1071 fail_workqueue: 1072 wiphy_unregister(local->hw.wiphy); 1073 fail_wiphy_register: 1074 if (local->wiphy_ciphers_allocated) 1075 kfree(local->hw.wiphy->cipher_suites); 1076 kfree(local->int_scan_req); 1077 return result; 1078} 1079EXPORT_SYMBOL(ieee80211_register_hw); 1080 1081void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1082{ 1083 struct ieee80211_local *local = hw_to_local(hw); 1084 1085 tasklet_kill(&local->tx_pending_tasklet); 1086 tasklet_kill(&local->tasklet); 1087 1088 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1089 &local->network_latency_notifier); 1090#ifdef CONFIG_INET 1091 unregister_inetaddr_notifier(&local->ifa_notifier); 1092#endif 1093#if IS_ENABLED(CONFIG_IPV6) 1094 unregister_inet6addr_notifier(&local->ifa6_notifier); 1095#endif 1096 1097 rtnl_lock(); 1098 1099 /* 1100 * At this point, interface list manipulations are fine 1101 * because the driver cannot be handing us frames any 1102 * more and the tasklet is killed. 1103 */ 1104 ieee80211_remove_interfaces(local); 1105 1106 rtnl_unlock(); 1107 1108 cancel_work_sync(&local->restart_work); 1109 cancel_work_sync(&local->reconfig_filter); 1110 1111 ieee80211_clear_tx_pending(local); 1112 rate_control_deinitialize(local); 1113 1114 if (skb_queue_len(&local->skb_queue) || 1115 skb_queue_len(&local->skb_queue_unreliable)) 1116 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1117 skb_queue_purge(&local->skb_queue); 1118 skb_queue_purge(&local->skb_queue_unreliable); 1119 1120 destroy_workqueue(local->workqueue); 1121 wiphy_unregister(local->hw.wiphy); 1122 sta_info_stop(local); 1123 ieee80211_wep_free(local); 1124 ieee80211_led_exit(local); 1125 kfree(local->int_scan_req); 1126} 1127EXPORT_SYMBOL(ieee80211_unregister_hw); 1128 1129static int ieee80211_free_ack_frame(int id, void *p, void *data) 1130{ 1131 WARN_ONCE(1, "Have pending ack frames!\n"); 1132 kfree_skb(p); 1133 return 0; 1134} 1135 1136void ieee80211_free_hw(struct ieee80211_hw *hw) 1137{ 1138 struct ieee80211_local *local = hw_to_local(hw); 1139 1140 mutex_destroy(&local->iflist_mtx); 1141 mutex_destroy(&local->mtx); 1142 1143 if (local->wiphy_ciphers_allocated) 1144 kfree(local->hw.wiphy->cipher_suites); 1145 1146 idr_for_each(&local->ack_status_frames, 1147 ieee80211_free_ack_frame, NULL); 1148 idr_destroy(&local->ack_status_frames); 1149 1150 wiphy_free(local->hw.wiphy); 1151} 1152EXPORT_SYMBOL(ieee80211_free_hw); 1153 1154static int __init ieee80211_init(void) 1155{ 1156 struct sk_buff *skb; 1157 int ret; 1158 1159 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1160 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1161 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1162 1163 ret = rc80211_minstrel_init(); 1164 if (ret) 1165 return ret; 1166 1167 ret = rc80211_minstrel_ht_init(); 1168 if (ret) 1169 goto err_minstrel; 1170 1171 ret = rc80211_pid_init(); 1172 if (ret) 1173 goto err_pid; 1174 1175 ret = ieee80211_iface_init(); 1176 if (ret) 1177 goto err_netdev; 1178 1179 return 0; 1180 err_netdev: 1181 rc80211_pid_exit(); 1182 err_pid: 1183 rc80211_minstrel_ht_exit(); 1184 err_minstrel: 1185 rc80211_minstrel_exit(); 1186 1187 return ret; 1188} 1189 1190static void __exit ieee80211_exit(void) 1191{ 1192 rc80211_pid_exit(); 1193 rc80211_minstrel_ht_exit(); 1194 rc80211_minstrel_exit(); 1195 1196 ieee80211s_stop(); 1197 1198 ieee80211_iface_exit(); 1199 1200 rcu_barrier(); 1201} 1202 1203 1204subsys_initcall(ieee80211_init); 1205module_exit(ieee80211_exit); 1206 1207MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1208MODULE_LICENSE("GPL"); 1209