2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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.
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
48 /* common interface routines */
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
83 changed_flags = local->filter_flags ^ new_flags;
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
93 WARN_ON(new_flags & (1<<31));
95 local->filter_flags = new_flags & ~(1<<31);
98 /* master interface */
100 static int ieee80211_master_open(struct net_device *dev)
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
108 if (netif_running(sdata->dev)) {
117 netif_tx_start_all_queues(local->mdev);
122 static int ieee80211_master_stop(struct net_device *dev)
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
129 if (netif_running(sdata->dev))
130 dev_close(sdata->dev);
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
139 ieee80211_configure_filter(local);
142 /* regular interfaces */
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
165 static inline int identical_mac_addr_allowed(int type1, int type2)
167 return (type1 == IEEE80211_IF_TYPE_MNTR ||
168 type2 == IEEE80211_IF_TYPE_MNTR ||
169 (type1 == IEEE80211_IF_TYPE_AP &&
170 type2 == IEEE80211_IF_TYPE_WDS) ||
171 (type1 == IEEE80211_IF_TYPE_WDS &&
172 (type2 == IEEE80211_IF_TYPE_WDS ||
173 type2 == IEEE80211_IF_TYPE_AP)) ||
174 (type1 == IEEE80211_IF_TYPE_AP &&
175 type2 == IEEE80211_IF_TYPE_VLAN) ||
176 (type1 == IEEE80211_IF_TYPE_VLAN &&
177 (type2 == IEEE80211_IF_TYPE_AP ||
178 type2 == IEEE80211_IF_TYPE_VLAN)));
181 static int ieee80211_open(struct net_device *dev)
183 struct ieee80211_sub_if_data *sdata, *nsdata;
184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
185 struct sta_info *sta;
186 struct ieee80211_if_init_conf conf;
189 bool need_hw_reconfig = 0;
190 u8 null_addr[ETH_ALEN] = {0};
192 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
194 /* fail early if user set an invalid address */
195 if (compare_ether_addr(dev->dev_addr, null_addr) &&
196 !is_valid_ether_addr(dev->dev_addr))
197 return -EADDRNOTAVAIL;
199 /* we hold the RTNL here so can safely walk the list */
200 list_for_each_entry(nsdata, &local->interfaces, list) {
201 struct net_device *ndev = nsdata->dev;
203 if (ndev != dev && netif_running(ndev)) {
205 * Allow only a single IBSS interface to be up at any
206 * time. This is restricted because beacon distribution
207 * cannot work properly if both are in the same IBSS.
209 * To remove this restriction we'd have to disallow them
210 * from setting the same SSID on different IBSS interfaces
211 * belonging to the same hardware. Then, however, we're
212 * faced with having to adopt two different TSF timers...
214 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
215 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
219 * The remaining checks are only performed for interfaces
220 * with the same MAC address.
222 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
226 * check whether it may have the same address
228 if (!identical_mac_addr_allowed(sdata->vif.type,
233 * can only add VLANs to enabled APs
235 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
236 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
237 sdata->bss = &nsdata->u.ap;
241 switch (sdata->vif.type) {
242 case IEEE80211_IF_TYPE_WDS:
243 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
246 case IEEE80211_IF_TYPE_VLAN:
249 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
251 case IEEE80211_IF_TYPE_AP:
252 sdata->bss = &sdata->u.ap;
254 case IEEE80211_IF_TYPE_MESH_POINT:
255 /* mesh ifaces must set allmulti to forward mcast traffic */
256 atomic_inc(&local->iff_allmultis);
258 case IEEE80211_IF_TYPE_STA:
259 case IEEE80211_IF_TYPE_MNTR:
260 case IEEE80211_IF_TYPE_IBSS:
261 /* no special treatment */
263 case IEEE80211_IF_TYPE_INVALID:
269 if (local->open_count == 0) {
271 if (local->ops->start)
272 res = local->ops->start(local_to_hw(local));
275 need_hw_reconfig = 1;
276 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
280 * Check all interfaces and copy the hopefully now-present
281 * MAC address to those that have the special null one.
283 list_for_each_entry(nsdata, &local->interfaces, list) {
284 struct net_device *ndev = nsdata->dev;
287 * No need to check netif_running since we do not allow
288 * it to start up with this invalid address.
290 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
291 memcpy(ndev->dev_addr,
292 local->hw.wiphy->perm_addr,
296 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
297 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
301 * Validate the MAC address for this device.
303 if (!is_valid_ether_addr(dev->dev_addr)) {
304 if (!local->open_count && local->ops->stop)
305 local->ops->stop(local_to_hw(local));
306 return -EADDRNOTAVAIL;
309 switch (sdata->vif.type) {
310 case IEEE80211_IF_TYPE_VLAN:
311 /* no need to tell driver */
313 case IEEE80211_IF_TYPE_MNTR:
314 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
315 local->cooked_mntrs++;
319 /* must be before the call to ieee80211_configure_filter */
321 if (local->monitors == 1)
322 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
324 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
325 local->fif_fcsfail++;
326 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
327 local->fif_plcpfail++;
328 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
329 local->fif_control++;
330 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
331 local->fif_other_bss++;
333 netif_addr_lock_bh(local->mdev);
334 ieee80211_configure_filter(local);
335 netif_addr_unlock_bh(local->mdev);
337 case IEEE80211_IF_TYPE_STA:
338 case IEEE80211_IF_TYPE_IBSS:
339 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
342 conf.vif = &sdata->vif;
343 conf.type = sdata->vif.type;
344 conf.mac_addr = dev->dev_addr;
345 res = local->ops->add_interface(local_to_hw(local), &conf);
349 if (ieee80211_vif_is_mesh(&sdata->vif))
350 ieee80211_start_mesh(sdata);
351 changed |= ieee80211_reset_erp_info(sdata);
352 ieee80211_bss_info_change_notify(sdata, changed);
353 ieee80211_enable_keys(sdata);
355 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
356 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
357 netif_carrier_off(dev);
359 netif_carrier_on(dev);
362 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
363 /* Create STA entry for the WDS peer */
364 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
368 goto err_del_interface;
371 /* no locking required since STA is not live yet */
372 sta->flags |= WLAN_STA_AUTHORIZED;
374 res = sta_info_insert(sta);
376 /* STA has been freed */
377 goto err_del_interface;
381 if (local->open_count == 0) {
382 res = dev_open(local->mdev);
385 goto err_del_interface;
386 tasklet_enable(&local->tx_pending_tasklet);
387 tasklet_enable(&local->tasklet);
391 * set_multicast_list will be invoked by the networking core
392 * which will check whether any increments here were done in
393 * error and sync them down to the hardware as filter flags.
395 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
396 atomic_inc(&local->iff_allmultis);
398 if (sdata->flags & IEEE80211_SDATA_PROMISC)
399 atomic_inc(&local->iff_promiscs);
402 if (need_hw_reconfig) {
403 ieee80211_hw_config(local);
405 * set default queue parameters so drivers don't
406 * need to initialise the hardware if the hardware
407 * doesn't start up with sane defaults
409 ieee80211_set_wmm_default(sdata);
413 * ieee80211_sta_work is disabled while network interface
414 * is down. Therefore, some configuration changes may not
415 * yet be effective. Trigger execution of ieee80211_sta_work
418 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
419 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
420 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
421 queue_work(local->hw.workqueue, &ifsta->work);
424 netif_tx_start_all_queues(dev);
428 local->ops->remove_interface(local_to_hw(local), &conf);
430 if (!local->open_count && local->ops->stop)
431 local->ops->stop(local_to_hw(local));
434 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
435 list_del(&sdata->u.vlan.list);
439 static int ieee80211_stop(struct net_device *dev)
441 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
442 struct ieee80211_local *local = sdata->local;
443 struct ieee80211_if_init_conf conf;
444 struct sta_info *sta;
447 * Stop TX on this interface first.
449 netif_tx_stop_all_queues(dev);
452 * Now delete all active aggregation sessions.
456 list_for_each_entry_rcu(sta, &local->sta_list, list) {
457 if (sta->sdata == sdata)
458 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
464 * Remove all stations associated with this interface.
466 * This must be done before calling ops->remove_interface()
467 * because otherwise we can later invoke ops->sta_notify()
468 * whenever the STAs are removed, and that invalidates driver
469 * assumptions about always getting a vif pointer that is valid
470 * (because if we remove a STA after ops->remove_interface()
471 * the driver will have removed the vif info already!)
473 * We could relax this and only unlink the stations from the
474 * hash table and list but keep them on a per-sdata list that
475 * will be inserted back again when the interface is brought
476 * up again, but I don't currently see a use case for that,
477 * except with WDS which gets a STA entry created when it is
480 sta_info_flush(local, sdata);
483 * Don't count this interface for promisc/allmulti while it
484 * is down. dev_mc_unsync() will invoke set_multicast_list
485 * on the master interface which will sync these down to the
486 * hardware as filter flags.
488 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
489 atomic_dec(&local->iff_allmultis);
491 if (sdata->flags & IEEE80211_SDATA_PROMISC)
492 atomic_dec(&local->iff_promiscs);
494 dev_mc_unsync(local->mdev, dev);
496 /* APs need special treatment */
497 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
498 struct ieee80211_sub_if_data *vlan, *tmp;
499 struct beacon_data *old_beacon = sdata->u.ap.beacon;
502 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
506 /* down all dependent devices, that is VLANs */
507 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
509 dev_close(vlan->dev);
510 WARN_ON(!list_empty(&sdata->u.ap.vlans));
515 switch (sdata->vif.type) {
516 case IEEE80211_IF_TYPE_VLAN:
517 list_del(&sdata->u.vlan.list);
518 /* no need to tell driver */
520 case IEEE80211_IF_TYPE_MNTR:
521 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
522 local->cooked_mntrs--;
527 if (local->monitors == 0)
528 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
530 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
531 local->fif_fcsfail--;
532 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
533 local->fif_plcpfail--;
534 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
535 local->fif_control--;
536 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
537 local->fif_other_bss--;
539 netif_addr_lock_bh(local->mdev);
540 ieee80211_configure_filter(local);
541 netif_addr_unlock_bh(local->mdev);
543 case IEEE80211_IF_TYPE_MESH_POINT:
544 /* allmulti is always set on mesh ifaces */
545 atomic_dec(&local->iff_allmultis);
547 case IEEE80211_IF_TYPE_STA:
548 case IEEE80211_IF_TYPE_IBSS:
549 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
550 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
551 del_timer_sync(&sdata->u.sta.timer);
553 * When we get here, the interface is marked down.
554 * Call synchronize_rcu() to wait for the RX path
555 * should it be using the interface and enqueuing
556 * frames at this very time on another CPU.
559 skb_queue_purge(&sdata->u.sta.skb_queue);
561 if (local->scan_sdata == sdata) {
562 if (!local->ops->hw_scan) {
563 local->sta_sw_scanning = 0;
564 cancel_delayed_work(&local->scan_work);
566 local->sta_hw_scanning = 0;
569 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
570 kfree(sdata->u.sta.extra_ie);
571 sdata->u.sta.extra_ie = NULL;
572 sdata->u.sta.extra_ie_len = 0;
575 conf.vif = &sdata->vif;
576 conf.type = sdata->vif.type;
577 conf.mac_addr = dev->dev_addr;
578 /* disable all keys for as long as this netdev is down */
579 ieee80211_disable_keys(sdata);
580 local->ops->remove_interface(local_to_hw(local), &conf);
585 if (local->open_count == 0) {
586 if (netif_running(local->mdev))
587 dev_close(local->mdev);
589 if (local->ops->stop)
590 local->ops->stop(local_to_hw(local));
592 ieee80211_led_radio(local, 0);
594 flush_workqueue(local->hw.workqueue);
596 tasklet_disable(&local->tx_pending_tasklet);
597 tasklet_disable(&local->tasklet);
603 static void ieee80211_set_multicast_list(struct net_device *dev)
605 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
606 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
607 int allmulti, promisc, sdata_allmulti, sdata_promisc;
609 allmulti = !!(dev->flags & IFF_ALLMULTI);
610 promisc = !!(dev->flags & IFF_PROMISC);
611 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
612 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
614 if (allmulti != sdata_allmulti) {
615 if (dev->flags & IFF_ALLMULTI)
616 atomic_inc(&local->iff_allmultis);
618 atomic_dec(&local->iff_allmultis);
619 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
622 if (promisc != sdata_promisc) {
623 if (dev->flags & IFF_PROMISC)
624 atomic_inc(&local->iff_promiscs);
626 atomic_dec(&local->iff_promiscs);
627 sdata->flags ^= IEEE80211_SDATA_PROMISC;
630 dev_mc_sync(local->mdev, dev);
633 static const struct header_ops ieee80211_header_ops = {
634 .create = eth_header,
635 .parse = header_parse_80211,
636 .rebuild = eth_rebuild_header,
637 .cache = eth_header_cache,
638 .cache_update = eth_header_cache_update,
641 void ieee80211_if_setup(struct net_device *dev)
644 dev->hard_start_xmit = ieee80211_subif_start_xmit;
645 dev->wireless_handlers = &ieee80211_iw_handler_def;
646 dev->set_multicast_list = ieee80211_set_multicast_list;
647 dev->change_mtu = ieee80211_change_mtu;
648 dev->open = ieee80211_open;
649 dev->stop = ieee80211_stop;
650 dev->destructor = free_netdev;
651 /* we will validate the address ourselves in ->open */
652 dev->validate_addr = NULL;
655 /* everything else */
657 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
659 struct ieee80211_local *local = sdata->local;
660 struct ieee80211_if_conf conf;
662 if (WARN_ON(!netif_running(sdata->dev)))
665 if (!local->ops->config_interface)
668 memset(&conf, 0, sizeof(conf));
669 conf.changed = changed;
671 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
672 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
673 conf.bssid = sdata->u.sta.bssid;
674 conf.ssid = sdata->u.sta.ssid;
675 conf.ssid_len = sdata->u.sta.ssid_len;
676 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
677 conf.bssid = sdata->dev->dev_addr;
678 conf.ssid = sdata->u.ap.ssid;
679 conf.ssid_len = sdata->u.ap.ssid_len;
680 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
681 u8 zero[ETH_ALEN] = { 0 };
690 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
693 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
696 return local->ops->config_interface(local_to_hw(local),
700 int ieee80211_hw_config(struct ieee80211_local *local)
702 struct ieee80211_channel *chan;
705 if (local->sta_sw_scanning)
706 chan = local->scan_channel;
708 chan = local->oper_channel;
710 local->hw.conf.channel = chan;
712 if (!local->hw.conf.power_level)
713 local->hw.conf.power_level = chan->max_power;
715 local->hw.conf.power_level = min(chan->max_power,
716 local->hw.conf.power_level);
718 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
720 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
721 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
722 wiphy_name(local->hw.wiphy), chan->center_freq);
725 if (local->open_count)
726 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
732 * ieee80211_handle_ht should be used only after legacy configuration
733 * has been determined namely band, as ht configuration depends upon
734 * the hardware's HT abilities for a _specific_ band.
736 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
737 struct ieee80211_ht_info *req_ht_cap,
738 struct ieee80211_ht_bss_info *req_bss_cap)
740 struct ieee80211_conf *conf = &local->hw.conf;
741 struct ieee80211_supported_band *sband;
742 struct ieee80211_ht_info ht_conf;
743 struct ieee80211_ht_bss_info ht_bss_conf;
746 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
749 sband = local->hw.wiphy->bands[conf->channel->band];
751 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
752 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
754 /* HT is not supported */
755 if (!sband->ht_info.ht_supported) {
756 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
762 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
763 changed |= BSS_CHANGED_HT;
764 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
765 conf->ht_conf.ht_supported = 0;
770 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
771 changed |= BSS_CHANGED_HT;
773 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
774 ht_conf.ht_supported = 1;
776 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
777 ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS);
778 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS;
779 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
780 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
781 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
783 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
784 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
787 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
789 /* configure suppoerted Tx MCS according to requested MCS
790 * (based in most cases on Rx capabilities of peer) and self
791 * Tx MCS capabilities (as defined by low level driver HW
792 * Tx capabilities) */
793 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
796 /* Counting from 0 therfore + 1 */
797 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
798 max_tx_streams = ((tx_mcs_set_cap &
799 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
801 for (i = 0; i < max_tx_streams; i++)
802 ht_conf.supp_mcs_set[i] =
803 sband->ht_info.supp_mcs_set[i] &
804 req_ht_cap->supp_mcs_set[i];
806 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
807 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
808 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
809 ht_conf.supp_mcs_set[i] =
810 sband->ht_info.supp_mcs_set[i] &
811 req_ht_cap->supp_mcs_set[i];
814 /* if bss configuration changed store the new one */
815 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
816 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
817 changed |= BSS_CHANGED_HT;
818 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
819 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
825 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
828 struct ieee80211_local *local = sdata->local;
833 if (local->ops->bss_info_changed)
834 local->ops->bss_info_changed(local_to_hw(local),
840 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
842 sdata->bss_conf.use_cts_prot = 0;
843 sdata->bss_conf.use_short_preamble = 0;
844 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
847 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
850 struct ieee80211_local *local = hw_to_local(hw);
851 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
854 skb->dev = local->mdev;
855 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
856 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
857 &local->skb_queue : &local->skb_queue_unreliable, skb);
858 tmp = skb_queue_len(&local->skb_queue) +
859 skb_queue_len(&local->skb_queue_unreliable);
860 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
861 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
862 dev_kfree_skb_irq(skb);
864 I802_DEBUG_INC(local->tx_status_drop);
866 tasklet_schedule(&local->tasklet);
868 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
870 static void ieee80211_tasklet_handler(unsigned long data)
872 struct ieee80211_local *local = (struct ieee80211_local *) data;
874 struct ieee80211_rx_status rx_status;
875 struct ieee80211_ra_tid *ra_tid;
877 while ((skb = skb_dequeue(&local->skb_queue)) ||
878 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
879 switch (skb->pkt_type) {
880 case IEEE80211_RX_MSG:
881 /* status is in skb->cb */
882 memcpy(&rx_status, skb->cb, sizeof(rx_status));
883 /* Clear skb->pkt_type in order to not confuse kernel
886 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
888 case IEEE80211_TX_STATUS_MSG:
890 ieee80211_tx_status(local_to_hw(local), skb);
892 case IEEE80211_DELBA_MSG:
893 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
894 ieee80211_stop_tx_ba_cb(local_to_hw(local),
895 ra_tid->ra, ra_tid->tid);
898 case IEEE80211_ADDBA_MSG:
899 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
900 ieee80211_start_tx_ba_cb(local_to_hw(local),
901 ra_tid->ra, ra_tid->tid);
912 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
913 * make a prepared TX frame (one that has been given to hw) to look like brand
914 * new IEEE 802.11 frame that is ready to go through TX processing again.
916 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
917 struct ieee80211_key *key,
920 unsigned int hdrlen, iv_len, mic_len;
921 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
923 hdrlen = ieee80211_hdrlen(hdr->frame_control);
928 switch (key->conf.alg) {
931 mic_len = WEP_ICV_LEN;
934 iv_len = TKIP_IV_LEN;
935 mic_len = TKIP_ICV_LEN;
938 iv_len = CCMP_HDR_LEN;
939 mic_len = CCMP_MIC_LEN;
945 if (skb->len >= hdrlen + mic_len &&
946 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
947 skb_trim(skb, skb->len - mic_len);
948 if (skb->len >= hdrlen + iv_len) {
949 memmove(skb->data + iv_len, skb->data, hdrlen);
950 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
954 if (ieee80211_is_data_qos(hdr->frame_control)) {
955 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
956 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
957 hdrlen - IEEE80211_QOS_CTL_LEN);
958 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
962 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
963 struct sta_info *sta,
966 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
968 sta->tx_filtered_count++;
971 * Clear the TX filter mask for this STA when sending the next
972 * packet. If the STA went to power save mode, this will happen
973 * when it wakes up for the next time.
975 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
978 * This code races in the following way:
980 * (1) STA sends frame indicating it will go to sleep and does so
981 * (2) hardware/firmware adds STA to filter list, passes frame up
982 * (3) hardware/firmware processes TX fifo and suppresses a frame
983 * (4) we get TX status before having processed the frame and
984 * knowing that the STA has gone to sleep.
986 * This is actually quite unlikely even when both those events are
987 * processed from interrupts coming in quickly after one another or
988 * even at the same time because we queue both TX status events and
989 * RX frames to be processed by a tasklet and process them in the
990 * same order that they were received or TX status last. Hence, there
991 * is no race as long as the frame RX is processed before the next TX
992 * status, which drivers can ensure, see below.
994 * Note that this can only happen if the hardware or firmware can
995 * actually add STAs to the filter list, if this is done by the
996 * driver in response to set_tim() (which will only reduce the race
997 * this whole filtering tries to solve, not completely solve it)
998 * this situation cannot happen.
1000 * To completely solve this race drivers need to make sure that they
1001 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1003 * (b) always process RX events before TX status events if ordering
1004 * can be unknown, for example with different interrupt status
1007 if (test_sta_flags(sta, WLAN_STA_PS) &&
1008 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1009 ieee80211_remove_tx_extra(local, sta->key, skb);
1010 skb_queue_tail(&sta->tx_filtered, skb);
1014 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1015 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1016 /* Software retry the packet once */
1017 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1018 ieee80211_remove_tx_extra(local, sta->key, skb);
1019 dev_queue_xmit(skb);
1023 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1024 if (net_ratelimit())
1025 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1026 "queue_len=%d PS=%d @%lu\n",
1027 wiphy_name(local->hw.wiphy),
1028 skb_queue_len(&sta->tx_filtered),
1029 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1034 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1036 struct sk_buff *skb2;
1037 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1038 struct ieee80211_local *local = hw_to_local(hw);
1039 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1042 struct ieee80211_tx_status_rtap_hdr *rthdr;
1043 struct ieee80211_sub_if_data *sdata;
1044 struct net_device *prev_dev = NULL;
1045 struct sta_info *sta;
1049 if (info->status.excessive_retries) {
1050 sta = sta_info_get(local, hdr->addr1);
1052 if (test_sta_flags(sta, WLAN_STA_PS)) {
1054 * The STA is in power save mode, so assume
1055 * that this TX packet failed because of that.
1057 ieee80211_handle_filtered_frame(local, sta, skb);
1064 fc = hdr->frame_control;
1066 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1067 (ieee80211_is_data_qos(fc))) {
1070 sta = sta_info_get(local, hdr->addr1);
1072 qc = ieee80211_get_qos_ctl(hdr);
1074 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1075 & IEEE80211_SCTL_SEQ);
1076 ieee80211_send_bar(sta->sdata, hdr->addr1,
1081 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1082 sta = sta_info_get(local, hdr->addr1);
1084 ieee80211_handle_filtered_frame(local, sta, skb);
1089 rate_control_tx_status(local->mdev, skb);
1093 ieee80211_led_tx(local, 0);
1096 * Fragments are passed to low-level drivers as separate skbs, so these
1097 * are actually fragments, not frames. Update frame counters only for
1098 * the first fragment of the frame. */
1100 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1101 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1103 if (info->flags & IEEE80211_TX_STAT_ACK) {
1105 local->dot11TransmittedFrameCount++;
1106 if (is_multicast_ether_addr(hdr->addr1))
1107 local->dot11MulticastTransmittedFrameCount++;
1108 if (info->status.retry_count > 0)
1109 local->dot11RetryCount++;
1110 if (info->status.retry_count > 1)
1111 local->dot11MultipleRetryCount++;
1114 /* This counter shall be incremented for an acknowledged MPDU
1115 * with an individual address in the address 1 field or an MPDU
1116 * with a multicast address in the address 1 field of type Data
1118 if (!is_multicast_ether_addr(hdr->addr1) ||
1119 type == IEEE80211_FTYPE_DATA ||
1120 type == IEEE80211_FTYPE_MGMT)
1121 local->dot11TransmittedFragmentCount++;
1124 local->dot11FailedCount++;
1127 /* this was a transmitted frame, but now we want to reuse it */
1131 * This is a bit racy but we can avoid a lot of work
1134 if (!local->monitors && !local->cooked_mntrs) {
1139 /* send frame to monitor interfaces now */
1141 if (skb_headroom(skb) < sizeof(*rthdr)) {
1142 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1147 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1148 skb_push(skb, sizeof(*rthdr));
1150 memset(rthdr, 0, sizeof(*rthdr));
1151 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1152 rthdr->hdr.it_present =
1153 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1154 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1156 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1157 !is_multicast_ether_addr(hdr->addr1))
1158 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1160 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1161 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1162 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1163 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1164 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1166 rthdr->data_retries = info->status.retry_count;
1168 /* XXX: is this sufficient for BPF? */
1169 skb_set_mac_header(skb, 0);
1170 skb->ip_summed = CHECKSUM_UNNECESSARY;
1171 skb->pkt_type = PACKET_OTHERHOST;
1172 skb->protocol = htons(ETH_P_802_2);
1173 memset(skb->cb, 0, sizeof(skb->cb));
1176 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1177 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1178 if (!netif_running(sdata->dev))
1182 skb2 = skb_clone(skb, GFP_ATOMIC);
1184 skb2->dev = prev_dev;
1189 prev_dev = sdata->dev;
1193 skb->dev = prev_dev;
1200 EXPORT_SYMBOL(ieee80211_tx_status);
1202 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1203 const struct ieee80211_ops *ops)
1205 struct ieee80211_local *local;
1207 struct wiphy *wiphy;
1209 /* Ensure 32-byte alignment of our private data and hw private data.
1210 * We use the wiphy priv data for both our ieee80211_local and for
1211 * the driver's private data
1213 * In memory it'll be like this:
1215 * +-------------------------+
1217 * +-------------------------+
1218 * | struct ieee80211_local |
1219 * +-------------------------+
1220 * | driver's private data |
1221 * +-------------------------+
1224 priv_size = ((sizeof(struct ieee80211_local) +
1225 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1228 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1233 wiphy->privid = mac80211_wiphy_privid;
1235 local = wiphy_priv(wiphy);
1236 local->hw.wiphy = wiphy;
1238 local->hw.priv = (char *)local +
1239 ((sizeof(struct ieee80211_local) +
1240 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1243 BUG_ON(!ops->start);
1245 BUG_ON(!ops->config);
1246 BUG_ON(!ops->add_interface);
1247 BUG_ON(!ops->remove_interface);
1248 BUG_ON(!ops->configure_filter);
1251 local->hw.queues = 1; /* default */
1253 local->bridge_packets = 1;
1255 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1256 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1257 local->short_retry_limit = 7;
1258 local->long_retry_limit = 4;
1259 local->hw.conf.radio_enabled = 1;
1261 INIT_LIST_HEAD(&local->interfaces);
1263 spin_lock_init(&local->key_lock);
1265 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1267 sta_info_init(local);
1269 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1270 (unsigned long)local);
1271 tasklet_disable(&local->tx_pending_tasklet);
1273 tasklet_init(&local->tasklet,
1274 ieee80211_tasklet_handler,
1275 (unsigned long) local);
1276 tasklet_disable(&local->tasklet);
1278 skb_queue_head_init(&local->skb_queue);
1279 skb_queue_head_init(&local->skb_queue_unreliable);
1281 return local_to_hw(local);
1283 EXPORT_SYMBOL(ieee80211_alloc_hw);
1285 int ieee80211_register_hw(struct ieee80211_hw *hw)
1287 struct ieee80211_local *local = hw_to_local(hw);
1290 enum ieee80211_band band;
1291 struct net_device *mdev;
1292 struct wireless_dev *mwdev;
1295 * generic code guarantees at least one band,
1296 * set this very early because much code assumes
1297 * that hw.conf.channel is assigned
1299 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1300 struct ieee80211_supported_band *sband;
1302 sband = local->hw.wiphy->bands[band];
1304 /* init channel we're on */
1305 local->hw.conf.channel =
1306 local->oper_channel =
1307 local->scan_channel = &sband->channels[0];
1312 /* if low-level driver supports AP, we also support VLAN */
1313 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
1314 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1316 /* mac80211 always supports monitor */
1317 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1319 result = wiphy_register(local->hw.wiphy);
1324 * We use the number of queues for feature tests (QoS, HT) internally
1325 * so restrict them appropriately.
1327 if (hw->queues > IEEE80211_MAX_QUEUES)
1328 hw->queues = IEEE80211_MAX_QUEUES;
1329 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1330 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1332 hw->ampdu_queues = 0;
1334 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1335 "wmaster%d", ether_setup,
1336 ieee80211_num_queues(hw));
1338 goto fail_mdev_alloc;
1340 mwdev = netdev_priv(mdev);
1341 mdev->ieee80211_ptr = mwdev;
1342 mwdev->wiphy = local->hw.wiphy;
1346 ieee80211_rx_bss_list_init(local);
1348 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1349 mdev->open = ieee80211_master_open;
1350 mdev->stop = ieee80211_master_stop;
1351 mdev->type = ARPHRD_IEEE80211;
1352 mdev->header_ops = &ieee80211_header_ops;
1353 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1355 name = wiphy_dev(local->hw.wiphy)->driver->name;
1356 local->hw.workqueue = create_freezeable_workqueue(name);
1357 if (!local->hw.workqueue) {
1359 goto fail_workqueue;
1363 * The hardware needs headroom for sending the frame,
1364 * and we need some headroom for passing the frame to monitor
1365 * interfaces, but never both at the same time.
1367 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1368 sizeof(struct ieee80211_tx_status_rtap_hdr));
1370 debugfs_hw_add(local);
1372 if (local->hw.conf.beacon_int < 10)
1373 local->hw.conf.beacon_int = 100;
1375 if (local->hw.max_listen_interval == 0)
1376 local->hw.max_listen_interval = 1;
1378 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1380 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1381 IEEE80211_HW_SIGNAL_DB |
1382 IEEE80211_HW_SIGNAL_DBM) ?
1383 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1384 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1385 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1386 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1387 local->wstats_flags |= IW_QUAL_DBM;
1389 result = sta_info_start(local);
1394 result = dev_alloc_name(local->mdev, local->mdev->name);
1398 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1399 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1401 result = register_netdevice(local->mdev);
1405 result = ieee80211_init_rate_ctrl_alg(local,
1406 hw->rate_control_algorithm);
1408 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1409 "algorithm\n", wiphy_name(local->hw.wiphy));
1413 result = ieee80211_wep_init(local);
1416 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1417 wiphy_name(local->hw.wiphy), result);
1421 local->mdev->select_queue = ieee80211_select_queue;
1423 /* add one default STA interface */
1424 result = ieee80211_if_add(local, "wlan%d", NULL,
1425 IEEE80211_IF_TYPE_STA, NULL);
1427 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1428 wiphy_name(local->hw.wiphy));
1432 ieee80211_led_init(local);
1437 rate_control_deinitialize(local);
1439 unregister_netdevice(local->mdev);
1443 sta_info_stop(local);
1445 debugfs_hw_del(local);
1446 destroy_workqueue(local->hw.workqueue);
1449 free_netdev(local->mdev);
1451 wiphy_unregister(local->hw.wiphy);
1454 EXPORT_SYMBOL(ieee80211_register_hw);
1456 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1458 struct ieee80211_local *local = hw_to_local(hw);
1460 tasklet_kill(&local->tx_pending_tasklet);
1461 tasklet_kill(&local->tasklet);
1466 * At this point, interface list manipulations are fine
1467 * because the driver cannot be handing us frames any
1468 * more and the tasklet is killed.
1471 /* First, we remove all virtual interfaces. */
1472 ieee80211_remove_interfaces(local);
1474 /* then, finally, remove the master interface */
1475 unregister_netdevice(local->mdev);
1479 ieee80211_rx_bss_list_deinit(local);
1480 ieee80211_clear_tx_pending(local);
1481 sta_info_stop(local);
1482 rate_control_deinitialize(local);
1483 debugfs_hw_del(local);
1485 if (skb_queue_len(&local->skb_queue)
1486 || skb_queue_len(&local->skb_queue_unreliable))
1487 printk(KERN_WARNING "%s: skb_queue not empty\n",
1488 wiphy_name(local->hw.wiphy));
1489 skb_queue_purge(&local->skb_queue);
1490 skb_queue_purge(&local->skb_queue_unreliable);
1492 destroy_workqueue(local->hw.workqueue);
1493 wiphy_unregister(local->hw.wiphy);
1494 ieee80211_wep_free(local);
1495 ieee80211_led_exit(local);
1496 free_netdev(local->mdev);
1498 EXPORT_SYMBOL(ieee80211_unregister_hw);
1500 void ieee80211_free_hw(struct ieee80211_hw *hw)
1502 struct ieee80211_local *local = hw_to_local(hw);
1504 wiphy_free(local->hw.wiphy);
1506 EXPORT_SYMBOL(ieee80211_free_hw);
1508 static int __init ieee80211_init(void)
1510 struct sk_buff *skb;
1513 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1514 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1515 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1517 ret = rc80211_pid_init();
1521 ieee80211_debugfs_netdev_init();
1526 static void __exit ieee80211_exit(void)
1531 * For key todo, it'll be empty by now but the work
1532 * might still be scheduled.
1534 flush_scheduled_work();
1539 ieee80211_debugfs_netdev_exit();
1543 subsys_initcall(ieee80211_init);
1544 module_exit(ieee80211_exit);
1546 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1547 MODULE_LICENSE("GPL");