2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2017 Intel Deutschland GmbH
7 * Copyright (C) 2018 Intel Corporation
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <net/mac80211.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/netdevice.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/bitmap.h>
25 #include <linux/inetdevice.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/addrconf.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
38 void ieee80211_configure_filter(struct ieee80211_local *local)
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
44 if (atomic_read(&local->iff_allmultis))
45 new_flags |= FIF_ALLMULTI;
47 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
48 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
49 new_flags |= FIF_BCN_PRBRESP_PROMISC;
51 if (local->fif_probe_req || local->probe_req_reg)
52 new_flags |= FIF_PROBE_REQ;
54 if (local->fif_fcsfail)
55 new_flags |= FIF_FCSFAIL;
57 if (local->fif_plcpfail)
58 new_flags |= FIF_PLCPFAIL;
60 if (local->fif_control)
61 new_flags |= FIF_CONTROL;
63 if (local->fif_other_bss)
64 new_flags |= FIF_OTHER_BSS;
66 if (local->fif_pspoll)
67 new_flags |= FIF_PSPOLL;
69 spin_lock_bh(&local->filter_lock);
70 changed_flags = local->filter_flags ^ new_flags;
72 mc = drv_prepare_multicast(local, &local->mc_list);
73 spin_unlock_bh(&local->filter_lock);
78 drv_configure_filter(local, changed_flags, &new_flags, mc);
80 WARN_ON(new_flags & (1<<31));
82 local->filter_flags = new_flags & ~(1<<31);
85 static void ieee80211_reconfig_filter(struct work_struct *work)
87 struct ieee80211_local *local =
88 container_of(work, struct ieee80211_local, reconfig_filter);
90 ieee80211_configure_filter(local);
93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
95 struct ieee80211_sub_if_data *sdata;
96 struct cfg80211_chan_def chandef = {};
101 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
103 if (local->scan_chandef.chan) {
104 chandef = local->scan_chandef;
105 } else if (local->tmp_channel) {
106 chandef.chan = local->tmp_channel;
107 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
108 chandef.center_freq1 = chandef.chan->center_freq;
110 chandef = local->_oper_chandef;
112 WARN(!cfg80211_chandef_valid(&chandef),
113 "control:%d MHz width:%d center: %d/%d MHz",
114 chandef.chan->center_freq, chandef.width,
115 chandef.center_freq1, chandef.center_freq2);
117 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
118 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
124 if (offchannel_flag ||
125 !cfg80211_chandef_identical(&local->hw.conf.chandef,
126 &local->_oper_chandef)) {
127 local->hw.conf.chandef = chandef;
128 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
131 if (!conf_is_ht(&local->hw.conf)) {
133 * mac80211.h documents that this is only valid
134 * when the channel is set to an HT type, and
135 * that otherwise STATIC is used.
137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
138 } else if (local->hw.conf.smps_mode != local->smps_mode) {
139 local->hw.conf.smps_mode = local->smps_mode;
140 changed |= IEEE80211_CONF_CHANGE_SMPS;
143 power = ieee80211_chandef_max_power(&chandef);
146 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
147 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
151 power = min(power, sdata->vif.bss_conf.txpower);
155 if (local->hw.conf.power_level != power) {
156 changed |= IEEE80211_CONF_CHANGE_POWER;
157 local->hw.conf.power_level = power;
163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
169 if (!local->use_chanctx)
170 changed |= ieee80211_hw_conf_chan(local);
172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173 IEEE80211_CONF_CHANGE_POWER);
175 if (changed && local->open_count) {
176 ret = drv_config(local, changed);
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
187 * FIXME: integrate rfkill with mac80211 and then add this
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
200 struct ieee80211_local *local = sdata->local;
202 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
210 sdata->vif.bss_conf.use_cts_prot = false;
211 sdata->vif.bss_conf.use_short_preamble = false;
212 sdata->vif.bss_conf.use_short_slot = false;
213 return BSS_CHANGED_ERP_CTS_PROT |
214 BSS_CHANGED_ERP_PREAMBLE |
215 BSS_CHANGED_ERP_SLOT;
218 static void ieee80211_tasklet_handler(unsigned long data)
220 struct ieee80211_local *local = (struct ieee80211_local *) data;
223 while ((skb = skb_dequeue(&local->skb_queue)) ||
224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225 switch (skb->pkt_type) {
226 case IEEE80211_RX_MSG:
227 /* Clear skb->pkt_type in order to not confuse kernel
230 ieee80211_rx(&local->hw, skb);
232 case IEEE80211_TX_STATUS_MSG:
234 ieee80211_tx_status(&local->hw, skb);
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
245 static void ieee80211_restart_work(struct work_struct *work)
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249 struct ieee80211_sub_if_data *sdata;
251 /* wait for scan work complete */
252 flush_workqueue(local->workqueue);
253 flush_work(&local->sched_scan_stopped_work);
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
258 flush_work(&local->radar_detected_work);
260 list_for_each_entry(sdata, &local->interfaces, list) {
262 * XXX: there may be more work for other vif types and even
263 * for station mode: a good thing would be to run most of
264 * the iface type's dependent _stop (ieee80211_mg_stop,
265 * ieee80211_ibss_stop) etc...
266 * For now, fix only the specific bug that was seen: race
267 * between csa_connection_drop_work and us.
269 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
271 * This worker is scheduled from the iface worker that
272 * runs on mac80211's workqueue, so we can't be
273 * scheduling this worker after the cancel right here.
274 * The exception is ieee80211_chswitch_done.
275 * Then we can have a race...
277 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
279 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
281 ieee80211_scan_cancel(local);
283 /* make sure any new ROC will consider local->in_reconfig */
284 flush_delayed_work(&local->roc_work);
285 flush_work(&local->hw_roc_done);
287 /* wait for all packet processing to be done */
290 ieee80211_reconfig(local);
294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
296 struct ieee80211_local *local = hw_to_local(hw);
298 trace_api_restart_hw(local);
300 wiphy_info(hw->wiphy,
301 "Hardware restart was requested\n");
303 /* use this reason, ieee80211_reconfig will unblock it */
304 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
305 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
309 * Stop all Rx during the reconfig. We don't want state changes
310 * or driver callbacks while this is in progress.
312 local->in_reconfig = true;
315 queue_work(system_freezable_wq, &local->restart_work);
317 EXPORT_SYMBOL(ieee80211_restart_hw);
320 static int ieee80211_ifa_changed(struct notifier_block *nb,
321 unsigned long data, void *arg)
323 struct in_ifaddr *ifa = arg;
324 struct ieee80211_local *local =
325 container_of(nb, struct ieee80211_local,
327 struct net_device *ndev = ifa->ifa_dev->dev;
328 struct wireless_dev *wdev = ndev->ieee80211_ptr;
329 struct in_device *idev;
330 struct ieee80211_sub_if_data *sdata;
331 struct ieee80211_bss_conf *bss_conf;
332 struct ieee80211_if_managed *ifmgd;
335 /* Make sure it's our interface that got changed */
339 if (wdev->wiphy != local->hw.wiphy)
342 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
343 bss_conf = &sdata->vif.bss_conf;
345 /* ARP filtering is only supported in managed mode */
346 if (sdata->vif.type != NL80211_IFTYPE_STATION)
349 idev = __in_dev_get_rtnl(sdata->dev);
353 ifmgd = &sdata->u.mgd;
356 /* Copy the addresses to the bss_conf list */
357 ifa = idev->ifa_list;
359 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
360 bss_conf->arp_addr_list[c] = ifa->ifa_address;
365 bss_conf->arp_addr_cnt = c;
367 /* Configure driver only if associated (which also implies it is up) */
368 if (ifmgd->associated)
369 ieee80211_bss_info_change_notify(sdata,
370 BSS_CHANGED_ARP_FILTER);
378 #if IS_ENABLED(CONFIG_IPV6)
379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
380 unsigned long data, void *arg)
382 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
383 struct inet6_dev *idev = ifa->idev;
384 struct net_device *ndev = ifa->idev->dev;
385 struct ieee80211_local *local =
386 container_of(nb, struct ieee80211_local, ifa6_notifier);
387 struct wireless_dev *wdev = ndev->ieee80211_ptr;
388 struct ieee80211_sub_if_data *sdata;
390 /* Make sure it's our interface that got changed */
391 if (!wdev || wdev->wiphy != local->hw.wiphy)
394 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
397 * For now only support station mode. This is mostly because
398 * doing AP would have to handle AP_VLAN in some way ...
400 if (sdata->vif.type != NL80211_IFTYPE_STATION)
403 drv_ipv6_addr_change(local, sdata, idev);
409 /* There isn't a lot of sense in it, but you can transmit anything you like */
410 static const struct ieee80211_txrx_stypes
411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
412 [NL80211_IFTYPE_ADHOC] = {
414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415 BIT(IEEE80211_STYPE_AUTH >> 4) |
416 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
419 [NL80211_IFTYPE_STATION] = {
421 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
424 [NL80211_IFTYPE_AP] = {
426 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
427 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
429 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
430 BIT(IEEE80211_STYPE_AUTH >> 4) |
431 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
432 BIT(IEEE80211_STYPE_ACTION >> 4),
434 [NL80211_IFTYPE_AP_VLAN] = {
437 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
438 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
440 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
441 BIT(IEEE80211_STYPE_AUTH >> 4) |
442 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
443 BIT(IEEE80211_STYPE_ACTION >> 4),
445 [NL80211_IFTYPE_P2P_CLIENT] = {
447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
450 [NL80211_IFTYPE_P2P_GO] = {
452 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
453 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
454 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
455 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
456 BIT(IEEE80211_STYPE_AUTH >> 4) |
457 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
458 BIT(IEEE80211_STYPE_ACTION >> 4),
460 [NL80211_IFTYPE_MESH_POINT] = {
462 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
463 BIT(IEEE80211_STYPE_AUTH >> 4) |
464 BIT(IEEE80211_STYPE_DEAUTH >> 4),
466 [NL80211_IFTYPE_P2P_DEVICE] = {
468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
473 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
474 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
475 IEEE80211_HT_AMPDU_PARM_DENSITY,
477 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
478 IEEE80211_HT_CAP_MAX_AMSDU |
479 IEEE80211_HT_CAP_SGI_20 |
480 IEEE80211_HT_CAP_SGI_40 |
481 IEEE80211_HT_CAP_LDPC_CODING |
482 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
484 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
485 0xff, 0xff, 0xff, 0xff, 0xff, },
489 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
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),
502 .rx_mcs_map = cpu_to_le16(~0),
503 .tx_mcs_map = cpu_to_le16(~0),
507 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
508 const struct ieee80211_ops *ops,
509 const char *requested_name)
511 struct ieee80211_local *local;
516 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
517 !ops->add_interface || !ops->remove_interface ||
518 !ops->configure_filter))
521 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
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))
530 use_chanctx = i == 5;
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
536 * In memory it'll be like this:
538 * +-------------------------+
540 * +-------------------------+
541 * | struct ieee80211_local |
542 * +-------------------------+
543 * | driver's private data |
544 * +-------------------------+
547 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
549 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
554 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
556 wiphy->privid = mac80211_wiphy_privid;
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;
564 if (ops->remain_on_channel)
565 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
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);
579 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
580 NL80211_FEATURE_AP_SCAN;
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.
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);
593 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
595 if (ops->wake_tx_queue)
596 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
600 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
602 local = wiphy_priv(wiphy);
604 if (sta_info_init(local))
607 local->hw.wiphy = wiphy;
609 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
612 local->use_chanctx = use_chanctx;
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 8 is ~4ms of queued data. Only affects local TCP
620 * This is the default, anyhow - drivers may need to override it
621 * for local reasons (longer buffers, longer completion time, or
624 local->hw.tx_sk_pacing_shift = 8;
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;
646 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
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);
653 INIT_LIST_HEAD(&local->interfaces);
654 INIT_LIST_HEAD(&local->mon_list);
656 __hw_addr_init(&local->mc_list);
658 mutex_init(&local->iflist_mtx);
659 mutex_init(&local->mtx);
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);
666 INIT_LIST_HEAD(&local->chanctx_list);
667 mutex_init(&local->chanctx_mtx);
669 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
671 INIT_WORK(&local->restart_work, ieee80211_restart_work);
673 INIT_WORK(&local->radar_detected_work,
674 ieee80211_dfs_radar_detected_work);
676 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
677 local->smps_mode = IEEE80211_SMPS_OFF;
679 INIT_WORK(&local->dynamic_ps_enable_work,
680 ieee80211_dynamic_ps_enable_work);
681 INIT_WORK(&local->dynamic_ps_disable_work,
682 ieee80211_dynamic_ps_disable_work);
683 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
685 INIT_WORK(&local->sched_scan_stopped_work,
686 ieee80211_sched_scan_stopped_work);
688 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
690 spin_lock_init(&local->ack_status_lock);
691 idr_init(&local->ack_status_frames);
693 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
694 skb_queue_head_init(&local->pending[i]);
695 atomic_set(&local->agg_queue_stop[i], 0);
697 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
698 (unsigned long)local);
700 if (ops->wake_tx_queue)
701 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
702 (unsigned long)local);
704 tasklet_init(&local->tasklet,
705 ieee80211_tasklet_handler,
706 (unsigned long) local);
708 skb_queue_head_init(&local->skb_queue);
709 skb_queue_head_init(&local->skb_queue_unreliable);
710 skb_queue_head_init(&local->skb_queue_tdls_chsw);
712 ieee80211_alloc_led_names(local);
714 ieee80211_roc_setup(local);
716 local->hw.radiotap_timestamp.units_pos = -1;
717 local->hw.radiotap_timestamp.accuracy = -1;
724 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
726 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
728 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
729 IS_ERR(local->wep_rx_tfm));
730 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
731 int n_suites = 0, r = 0, w = 0;
733 static const u32 cipher_suites[] = {
734 /* keep WEP first, it may be removed below */
735 WLAN_CIPHER_SUITE_WEP40,
736 WLAN_CIPHER_SUITE_WEP104,
737 WLAN_CIPHER_SUITE_TKIP,
738 WLAN_CIPHER_SUITE_CCMP,
739 WLAN_CIPHER_SUITE_CCMP_256,
740 WLAN_CIPHER_SUITE_GCMP,
741 WLAN_CIPHER_SUITE_GCMP_256,
743 /* keep last -- depends on hw flags! */
744 WLAN_CIPHER_SUITE_AES_CMAC,
745 WLAN_CIPHER_SUITE_BIP_CMAC_256,
746 WLAN_CIPHER_SUITE_BIP_GMAC_128,
747 WLAN_CIPHER_SUITE_BIP_GMAC_256,
750 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
751 local->hw.wiphy->cipher_suites) {
752 /* If the driver advertises, or doesn't support SW crypto,
753 * we only need to remove WEP if necessary.
758 /* well if it has _no_ ciphers ... fine */
759 if (!local->hw.wiphy->n_cipher_suites)
762 /* Driver provides cipher suites, but we need to exclude WEP */
763 suites = kmemdup(local->hw.wiphy->cipher_suites,
764 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
769 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
770 u32 suite = local->hw.wiphy->cipher_suites[r];
772 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
773 suite == WLAN_CIPHER_SUITE_WEP104)
777 } else if (!local->hw.cipher_schemes) {
778 /* If the driver doesn't have cipher schemes, there's nothing
779 * else to do other than assign the (software supported and
780 * perhaps offloaded) cipher suites.
782 local->hw.wiphy->cipher_suites = cipher_suites;
783 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
786 local->hw.wiphy->n_cipher_suites -= 4;
789 local->hw.wiphy->cipher_suites += 2;
790 local->hw.wiphy->n_cipher_suites -= 2;
793 /* not dynamically allocated, so just return */
796 const struct ieee80211_cipher_scheme *cs;
798 cs = local->hw.cipher_schemes;
800 /* Driver specifies cipher schemes only (but not cipher suites
801 * including the schemes)
803 * We start counting ciphers defined by schemes, TKIP, CCMP,
804 * CCMP-256, GCMP, and GCMP-256
806 n_suites = local->hw.n_cipher_schemes + 5;
808 /* check if we have WEP40 and WEP104 */
812 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
818 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
822 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
823 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
824 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
825 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
826 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
829 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
830 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
834 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
835 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
836 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
837 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
840 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
841 suites[w++] = cs[r].cipher;
842 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
849 local->hw.wiphy->cipher_suites = suites;
850 local->hw.wiphy->n_cipher_suites = w;
851 local->wiphy_ciphers_allocated = true;
856 int ieee80211_register_hw(struct ieee80211_hw *hw)
858 struct ieee80211_local *local = hw_to_local(hw);
860 enum nl80211_band band;
861 int channels, max_bitrates;
862 bool supp_ht, supp_vht, supp_he;
863 netdev_features_t feature_whitelist;
864 struct cfg80211_chan_def dflt_chandef = {};
866 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
867 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
868 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
871 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
872 (!local->ops->tdls_channel_switch ||
873 !local->ops->tdls_cancel_channel_switch ||
874 !local->ops->tdls_recv_channel_switch))
877 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
878 !local->ops->set_frag_threshold))
881 if (WARN_ON(local->hw.wiphy->interface_modes &
882 BIT(NL80211_IFTYPE_NAN) &&
883 (!local->ops->start_nan || !local->ops->stop_nan)))
887 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
891 if (!local->use_chanctx) {
892 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
893 const struct ieee80211_iface_combination *comb;
895 comb = &local->hw.wiphy->iface_combinations[i];
897 if (comb->num_different_channels > 1)
902 * WDS is currently prohibited when channel contexts are used
903 * because there's no clear definition of which channel WDS
904 * type interfaces use
906 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
909 /* DFS is not supported with multi-channel combinations yet */
910 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
911 const struct ieee80211_iface_combination *comb;
913 comb = &local->hw.wiphy->iface_combinations[i];
915 if (comb->radar_detect_widths &&
916 comb->num_different_channels > 1)
921 /* Only HW csum features are currently compatible with mac80211 */
922 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
923 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
924 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
925 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
928 if (hw->max_report_rates == 0)
929 hw->max_report_rates = hw->max_rates;
931 local->rx_chains = 1;
934 * generic code guarantees at least one band,
935 * set this very early because much code assumes
936 * that hw.conf.channel is assigned
943 for (band = 0; band < NUM_NL80211_BANDS; band++) {
944 struct ieee80211_supported_band *sband;
946 sband = local->hw.wiphy->bands[band];
950 if (!dflt_chandef.chan) {
951 cfg80211_chandef_create(&dflt_chandef,
954 /* init channel we're on */
955 if (!local->use_chanctx && !local->_oper_chandef.chan) {
956 local->hw.conf.chandef = dflt_chandef;
957 local->_oper_chandef = dflt_chandef;
959 local->monitor_chandef = dflt_chandef;
962 channels += sband->n_channels;
964 if (max_bitrates < sband->n_bitrates)
965 max_bitrates = sband->n_bitrates;
966 supp_ht = supp_ht || sband->ht_cap.ht_supported;
967 supp_vht = supp_vht || sband->vht_cap.vht_supported;
970 supp_he = !!ieee80211_get_he_sta_cap(sband);
972 if (!sband->ht_cap.ht_supported)
975 /* TODO: consider VHT for RX chains, hopefully it's the same */
977 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
980 /* no need to mask, SM_PS_DISABLED has all bits set */
981 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
982 IEEE80211_HT_CAP_SM_PS_SHIFT;
985 /* if low-level driver supports AP, we also support VLAN.
986 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
987 * based on their support to transmit SW encrypted packets.
989 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
990 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
991 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
992 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
995 /* mac80211 always supports monitor */
996 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
997 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
999 /* mac80211 doesn't support more than one IBSS interface right now */
1000 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1001 const struct ieee80211_iface_combination *c;
1004 c = &hw->wiphy->iface_combinations[i];
1006 for (j = 0; j < c->n_limits; j++)
1007 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1008 c->limits[j].max > 1)
1012 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1013 sizeof(void *) * channels, GFP_KERNEL);
1014 if (!local->int_scan_req)
1017 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1018 if (!local->hw.wiphy->bands[band])
1020 local->int_scan_req->rates[band] = (u32) -1;
1023 #ifndef CONFIG_MAC80211_MESH
1024 /* mesh depends on Kconfig, but drivers should set it if they want */
1025 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1028 /* if the underlying driver supports mesh, mac80211 will (at least)
1029 * provide routing of mesh authentication frames to userspace */
1030 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1031 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1033 /* mac80211 supports control port protocol changing */
1034 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1036 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1037 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1038 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1039 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1040 if (hw->max_signal <= 0) {
1042 goto fail_wiphy_register;
1047 * Calculate scan IE length -- we need this to alloc
1048 * memory and to subtract from the driver limit. It
1049 * includes the DS Params, (extended) supported rates, and HT
1050 * information -- SSID is the driver's responsibility.
1052 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1055 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1058 local->scan_ies_len +=
1059 2 + sizeof(struct ieee80211_vht_cap);
1061 /* HE cap element is variable in size - set len to allow max size */
1063 * TODO: 1 is added at the end of the calculation to accommodate for
1064 * the temporary placing of the HE capabilities IE under EXT.
1065 * Remove it once it is placed in the final place.
1068 local->scan_ies_len +=
1069 2 + sizeof(struct ieee80211_he_cap_elem) +
1070 sizeof(struct ieee80211_he_mcs_nss_supp) +
1071 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1073 if (!local->ops->hw_scan) {
1074 /* For hw_scan, driver needs to set these up. */
1075 local->hw.wiphy->max_scan_ssids = 4;
1076 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1080 * If the driver supports any scan IEs, then assume the
1081 * limit includes the IEs mac80211 will add, otherwise
1082 * leave it at zero and let the driver sort it out; we
1083 * still pass our IEs to the driver but userspace will
1084 * not be allowed to in that case.
1086 if (local->hw.wiphy->max_scan_ie_len)
1087 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1089 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1090 local->hw.n_cipher_schemes));
1092 result = ieee80211_init_cipher_suites(local);
1094 goto fail_wiphy_register;
1096 if (!local->ops->remain_on_channel)
1097 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1099 /* mac80211 based drivers don't support internal TDLS setup */
1100 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1101 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1103 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1104 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1105 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1107 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1109 result = wiphy_register(local->hw.wiphy);
1111 goto fail_wiphy_register;
1114 * We use the number of queues for feature tests (QoS, HT) internally
1115 * so restrict them appropriately.
1117 if (hw->queues > IEEE80211_MAX_QUEUES)
1118 hw->queues = IEEE80211_MAX_QUEUES;
1121 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1122 if (!local->workqueue) {
1124 goto fail_workqueue;
1128 * The hardware needs headroom for sending the frame,
1129 * and we need some headroom for passing the frame to monitor
1130 * interfaces, but never both at the same time.
1132 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1133 IEEE80211_TX_STATUS_HEADROOM);
1135 debugfs_hw_add(local);
1138 * if the driver doesn't specify a max listen interval we
1139 * use 5 which should be a safe default
1141 if (local->hw.max_listen_interval == 0)
1142 local->hw.max_listen_interval = 5;
1144 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1146 local->dynamic_ps_forced_timeout = -1;
1148 if (!local->hw.max_nan_de_entries)
1149 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1151 result = ieee80211_wep_init(local);
1153 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1156 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1158 ieee80211_led_init(local);
1160 result = ieee80211_txq_setup_flows(local);
1166 result = ieee80211_init_rate_ctrl_alg(local,
1167 hw->rate_control_algorithm);
1169 wiphy_debug(local->hw.wiphy,
1170 "Failed to initialize rate control algorithm\n");
1174 if (local->rate_ctrl) {
1175 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1176 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1177 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1181 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1182 * or have it when we don't, copy the sband structure and set/clear it.
1183 * This is necessary because rate scaling algorithms could be switched
1184 * and have different support values.
1185 * Print a message so that in the common case the reallocation can be
1188 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1189 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1190 struct ieee80211_supported_band *sband;
1191 bool local_cap, ie_cap;
1193 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1195 sband = local->hw.wiphy->bands[band];
1196 if (!sband || !sband->vht_cap.vht_supported)
1199 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1200 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1202 if (local_cap == ie_cap)
1205 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1211 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1214 sband->vht_cap.vht_mcs.tx_highest ^=
1215 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1217 local->hw.wiphy->bands[band] = sband;
1218 local->sband_allocated |= BIT(band);
1221 /* add one default STA interface if supported */
1222 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1223 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1224 struct vif_params params = {0};
1226 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1227 NL80211_IFTYPE_STATION, ¶ms);
1229 wiphy_warn(local->hw.wiphy,
1230 "Failed to add default virtual iface\n");
1236 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1237 result = register_inetaddr_notifier(&local->ifa_notifier);
1242 #if IS_ENABLED(CONFIG_IPV6)
1243 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1244 result = register_inet6addr_notifier(&local->ifa6_notifier);
1251 #if IS_ENABLED(CONFIG_IPV6)
1254 unregister_inetaddr_notifier(&local->ifa_notifier);
1257 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1261 rate_control_deinitialize(local);
1262 ieee80211_remove_interfaces(local);
1265 ieee80211_led_exit(local);
1266 ieee80211_wep_free(local);
1268 destroy_workqueue(local->workqueue);
1270 wiphy_unregister(local->hw.wiphy);
1271 fail_wiphy_register:
1272 if (local->wiphy_ciphers_allocated)
1273 kfree(local->hw.wiphy->cipher_suites);
1274 kfree(local->int_scan_req);
1277 EXPORT_SYMBOL(ieee80211_register_hw);
1279 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1281 struct ieee80211_local *local = hw_to_local(hw);
1283 tasklet_kill(&local->tx_pending_tasklet);
1284 tasklet_kill(&local->tasklet);
1287 unregister_inetaddr_notifier(&local->ifa_notifier);
1289 #if IS_ENABLED(CONFIG_IPV6)
1290 unregister_inet6addr_notifier(&local->ifa6_notifier);
1296 * At this point, interface list manipulations are fine
1297 * because the driver cannot be handing us frames any
1298 * more and the tasklet is killed.
1300 ieee80211_remove_interfaces(local);
1304 cancel_delayed_work_sync(&local->roc_work);
1305 cancel_work_sync(&local->restart_work);
1306 cancel_work_sync(&local->reconfig_filter);
1307 cancel_work_sync(&local->tdls_chsw_work);
1308 flush_work(&local->sched_scan_stopped_work);
1309 flush_work(&local->radar_detected_work);
1311 ieee80211_clear_tx_pending(local);
1312 rate_control_deinitialize(local);
1314 if (skb_queue_len(&local->skb_queue) ||
1315 skb_queue_len(&local->skb_queue_unreliable))
1316 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1317 skb_queue_purge(&local->skb_queue);
1318 skb_queue_purge(&local->skb_queue_unreliable);
1319 skb_queue_purge(&local->skb_queue_tdls_chsw);
1321 destroy_workqueue(local->workqueue);
1322 wiphy_unregister(local->hw.wiphy);
1323 ieee80211_wep_free(local);
1324 ieee80211_led_exit(local);
1325 kfree(local->int_scan_req);
1327 EXPORT_SYMBOL(ieee80211_unregister_hw);
1329 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1331 WARN_ONCE(1, "Have pending ack frames!\n");
1336 void ieee80211_free_hw(struct ieee80211_hw *hw)
1338 struct ieee80211_local *local = hw_to_local(hw);
1339 enum nl80211_band band;
1341 mutex_destroy(&local->iflist_mtx);
1342 mutex_destroy(&local->mtx);
1344 if (local->wiphy_ciphers_allocated)
1345 kfree(local->hw.wiphy->cipher_suites);
1347 idr_for_each(&local->ack_status_frames,
1348 ieee80211_free_ack_frame, NULL);
1349 idr_destroy(&local->ack_status_frames);
1351 sta_info_stop(local);
1353 ieee80211_free_led_names(local);
1355 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1356 if (!(local->sband_allocated & BIT(band)))
1358 kfree(local->hw.wiphy->bands[band]);
1361 wiphy_free(local->hw.wiphy);
1363 EXPORT_SYMBOL(ieee80211_free_hw);
1365 static int __init ieee80211_init(void)
1367 struct sk_buff *skb;
1370 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1371 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1372 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1374 ret = rc80211_minstrel_init();
1378 ret = ieee80211_iface_init();
1384 rc80211_minstrel_exit();
1389 static void __exit ieee80211_exit(void)
1391 rc80211_minstrel_exit();
1395 ieee80211_iface_exit();
1401 subsys_initcall(ieee80211_init);
1402 module_exit(ieee80211_exit);
1404 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1405 MODULE_LICENSE("GPL");