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ALSA: hda - Add missing terminators in patch_sigmatel.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / main.c
blobaa5a191598c9f1a6ab487abbfdeb964ee2fae4f9
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 <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>
26
27 #include "ieee80211_i.h"
28 #include "rate.h"
29 #include "mesh.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 /*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46 } __attribute__ ((packed));
47
48 /* common interface routines */
49
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51 {
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54 }
55
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
58 {
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
61
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
64
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
67
68 if (local->monitors)
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
70
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
73
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
76
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
79
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
82
83 changed_flags = local->filter_flags ^ new_flags;
84
85 /* be a bit nasty */
86 new_flags |= (1<<31);
87
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
92
93 WARN_ON(new_flags & (1<<31));
94
95 local->filter_flags = new_flags & ~(1<<31);
96 }
97
98 /* master interface */
99
100 static int ieee80211_master_open(struct net_device *dev)
101 {
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
105
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)) {
109 res = 0;
110 break;
111 }
112 }
113
114 if (res)
115 return res;
116
117 netif_tx_start_all_queues(local->mdev);
118
119 return 0;
120 }
121
122 static int ieee80211_master_stop(struct net_device *dev)
123 {
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
126
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);
131
132 return 0;
133 }
134
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
136 {
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
138
139 ieee80211_configure_filter(local);
140 }
141
142 /* regular interfaces */
143
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
145 {
146 int meshhdrlen;
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
148
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
150
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
153 if (new_mtu < 256 ||
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
155 return -EINVAL;
156 }
157
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 */
161 dev->mtu = new_mtu;
162 return 0;
163 }
164
165 static inline int identical_mac_addr_allowed(int type1, int type2)
166 {
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)));
179 }
180
181 static int ieee80211_open(struct net_device *dev)
182 {
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;
187 u32 changed = 0;
188 int res;
189 bool need_hw_reconfig = 0;
190
191 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
192
193 /* we hold the RTNL here so can safely walk the list */
194 list_for_each_entry(nsdata, &local->interfaces, list) {
195 struct net_device *ndev = nsdata->dev;
196
197 if (ndev != dev && netif_running(ndev)) {
198 /*
199 * Allow only a single IBSS interface to be up at any
200 * time. This is restricted because beacon distribution
201 * cannot work properly if both are in the same IBSS.
202 *
203 * To remove this restriction we'd have to disallow them
204 * from setting the same SSID on different IBSS interfaces
205 * belonging to the same hardware. Then, however, we're
206 * faced with having to adopt two different TSF timers...
207 */
208 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
209 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
210 return -EBUSY;
211
212 /*
213 * The remaining checks are only performed for interfaces
214 * with the same MAC address.
215 */
216 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
217 continue;
218
219 /*
220 * check whether it may have the same address
221 */
222 if (!identical_mac_addr_allowed(sdata->vif.type,
223 nsdata->vif.type))
224 return -ENOTUNIQ;
225
226 /*
227 * can only add VLANs to enabled APs
228 */
229 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
230 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
231 sdata->bss = &nsdata->u.ap;
232 }
233 }
234
235 switch (sdata->vif.type) {
236 case IEEE80211_IF_TYPE_WDS:
237 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
238 return -ENOLINK;
239 break;
240 case IEEE80211_IF_TYPE_VLAN:
241 if (!sdata->bss)
242 return -ENOLINK;
243 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
244 break;
245 case IEEE80211_IF_TYPE_AP:
246 sdata->bss = &sdata->u.ap;
247 break;
248 case IEEE80211_IF_TYPE_MESH_POINT:
249 /* mesh ifaces must set allmulti to forward mcast traffic */
250 atomic_inc(&local->iff_allmultis);
251 break;
252 case IEEE80211_IF_TYPE_STA:
253 case IEEE80211_IF_TYPE_MNTR:
254 case IEEE80211_IF_TYPE_IBSS:
255 /* no special treatment */
256 break;
257 case IEEE80211_IF_TYPE_INVALID:
258 /* cannot happen */
259 WARN_ON(1);
260 break;
261 }
262
263 if (local->open_count == 0) {
264 res = 0;
265 if (local->ops->start)
266 res = local->ops->start(local_to_hw(local));
267 if (res)
268 goto err_del_bss;
269 need_hw_reconfig = 1;
270 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
271 }
272
273 switch (sdata->vif.type) {
274 case IEEE80211_IF_TYPE_VLAN:
275 /* no need to tell driver */
276 break;
277 case IEEE80211_IF_TYPE_MNTR:
278 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
279 local->cooked_mntrs++;
280 break;
281 }
282
283 /* must be before the call to ieee80211_configure_filter */
284 local->monitors++;
285 if (local->monitors == 1)
286 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
287
288 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
289 local->fif_fcsfail++;
290 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
291 local->fif_plcpfail++;
292 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
293 local->fif_control++;
294 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
295 local->fif_other_bss++;
296
297 netif_addr_lock_bh(local->mdev);
298 ieee80211_configure_filter(local);
299 netif_addr_unlock_bh(local->mdev);
300 break;
301 case IEEE80211_IF_TYPE_STA:
302 case IEEE80211_IF_TYPE_IBSS:
303 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
304 /* fall through */
305 default:
306 conf.vif = &sdata->vif;
307 conf.type = sdata->vif.type;
308 conf.mac_addr = dev->dev_addr;
309 res = local->ops->add_interface(local_to_hw(local), &conf);
310 if (res)
311 goto err_stop;
312
313 if (ieee80211_vif_is_mesh(&sdata->vif))
314 ieee80211_start_mesh(sdata->dev);
315 changed |= ieee80211_reset_erp_info(dev);
316 ieee80211_bss_info_change_notify(sdata, changed);
317 ieee80211_enable_keys(sdata);
318
319 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
320 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
321 netif_carrier_off(dev);
322 else
323 netif_carrier_on(dev);
324 }
325
326 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
327 /* Create STA entry for the WDS peer */
328 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
329 GFP_KERNEL);
330 if (!sta) {
331 res = -ENOMEM;
332 goto err_del_interface;
333 }
334
335 /* no locking required since STA is not live yet */
336 sta->flags |= WLAN_STA_AUTHORIZED;
337
338 res = sta_info_insert(sta);
339 if (res) {
340 /* STA has been freed */
341 goto err_del_interface;
342 }
343 }
344
345 if (local->open_count == 0) {
346 res = dev_open(local->mdev);
347 WARN_ON(res);
348 if (res)
349 goto err_del_interface;
350 tasklet_enable(&local->tx_pending_tasklet);
351 tasklet_enable(&local->tasklet);
352 }
353
354 /*
355 * set_multicast_list will be invoked by the networking core
356 * which will check whether any increments here were done in
357 * error and sync them down to the hardware as filter flags.
358 */
359 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
360 atomic_inc(&local->iff_allmultis);
361
362 if (sdata->flags & IEEE80211_SDATA_PROMISC)
363 atomic_inc(&local->iff_promiscs);
364
365 local->open_count++;
366 if (need_hw_reconfig)
367 ieee80211_hw_config(local);
368
369 /*
370 * ieee80211_sta_work is disabled while network interface
371 * is down. Therefore, some configuration changes may not
372 * yet be effective. Trigger execution of ieee80211_sta_work
373 * to fix this.
374 */
375 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
376 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
377 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
378 queue_work(local->hw.workqueue, &ifsta->work);
379 }
380
381 netif_tx_start_all_queues(dev);
382
383 return 0;
384 err_del_interface:
385 local->ops->remove_interface(local_to_hw(local), &conf);
386 err_stop:
387 if (!local->open_count && local->ops->stop)
388 local->ops->stop(local_to_hw(local));
389 err_del_bss:
390 sdata->bss = NULL;
391 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
392 list_del(&sdata->u.vlan.list);
393 return res;
394 }
395
396 static int ieee80211_stop(struct net_device *dev)
397 {
398 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
399 struct ieee80211_local *local = sdata->local;
400 struct ieee80211_if_init_conf conf;
401 struct sta_info *sta;
402
403 /*
404 * Stop TX on this interface first.
405 */
406 netif_tx_stop_all_queues(dev);
407
408 /*
409 * Now delete all active aggregation sessions.
410 */
411 rcu_read_lock();
412
413 list_for_each_entry_rcu(sta, &local->sta_list, list) {
414 if (sta->sdata == sdata)
415 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
416 }
417
418 rcu_read_unlock();
419
420 /*
421 * Remove all stations associated with this interface.
422 *
423 * This must be done before calling ops->remove_interface()
424 * because otherwise we can later invoke ops->sta_notify()
425 * whenever the STAs are removed, and that invalidates driver
426 * assumptions about always getting a vif pointer that is valid
427 * (because if we remove a STA after ops->remove_interface()
428 * the driver will have removed the vif info already!)
429 *
430 * We could relax this and only unlink the stations from the
431 * hash table and list but keep them on a per-sdata list that
432 * will be inserted back again when the interface is brought
433 * up again, but I don't currently see a use case for that,
434 * except with WDS which gets a STA entry created when it is
435 * brought up.
436 */
437 sta_info_flush(local, sdata);
438
439 /*
440 * Don't count this interface for promisc/allmulti while it
441 * is down. dev_mc_unsync() will invoke set_multicast_list
442 * on the master interface which will sync these down to the
443 * hardware as filter flags.
444 */
445 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
446 atomic_dec(&local->iff_allmultis);
447
448 if (sdata->flags & IEEE80211_SDATA_PROMISC)
449 atomic_dec(&local->iff_promiscs);
450
451 dev_mc_unsync(local->mdev, dev);
452
453 /* APs need special treatment */
454 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
455 struct ieee80211_sub_if_data *vlan, *tmp;
456 struct beacon_data *old_beacon = sdata->u.ap.beacon;
457
458 /* remove beacon */
459 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
460 synchronize_rcu();
461 kfree(old_beacon);
462
463 /* down all dependent devices, that is VLANs */
464 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
465 u.vlan.list)
466 dev_close(vlan->dev);
467 WARN_ON(!list_empty(&sdata->u.ap.vlans));
468 }
469
470 local->open_count--;
471
472 switch (sdata->vif.type) {
473 case IEEE80211_IF_TYPE_VLAN:
474 list_del(&sdata->u.vlan.list);
475 /* no need to tell driver */
476 break;
477 case IEEE80211_IF_TYPE_MNTR:
478 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
479 local->cooked_mntrs--;
480 break;
481 }
482
483 local->monitors--;
484 if (local->monitors == 0)
485 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
486
487 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
488 local->fif_fcsfail--;
489 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
490 local->fif_plcpfail--;
491 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
492 local->fif_control--;
493 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
494 local->fif_other_bss--;
495
496 netif_addr_lock_bh(local->mdev);
497 ieee80211_configure_filter(local);
498 netif_addr_unlock_bh(local->mdev);
499 break;
500 case IEEE80211_IF_TYPE_MESH_POINT:
501 /* allmulti is always set on mesh ifaces */
502 atomic_dec(&local->iff_allmultis);
503 /* fall through */
504 case IEEE80211_IF_TYPE_STA:
505 case IEEE80211_IF_TYPE_IBSS:
506 sdata->u.sta.state = IEEE80211_DISABLED;
507 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
508 del_timer_sync(&sdata->u.sta.timer);
509 /*
510 * When we get here, the interface is marked down.
511 * Call synchronize_rcu() to wait for the RX path
512 * should it be using the interface and enqueuing
513 * frames at this very time on another CPU.
514 */
515 synchronize_rcu();
516 skb_queue_purge(&sdata->u.sta.skb_queue);
517
518 if (local->scan_dev == sdata->dev) {
519 if (!local->ops->hw_scan) {
520 local->sta_sw_scanning = 0;
521 cancel_delayed_work(&local->scan_work);
522 } else
523 local->sta_hw_scanning = 0;
524 }
525
526 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
527 kfree(sdata->u.sta.extra_ie);
528 sdata->u.sta.extra_ie = NULL;
529 sdata->u.sta.extra_ie_len = 0;
530 /* fall through */
531 default:
532 conf.vif = &sdata->vif;
533 conf.type = sdata->vif.type;
534 conf.mac_addr = dev->dev_addr;
535 /* disable all keys for as long as this netdev is down */
536 ieee80211_disable_keys(sdata);
537 local->ops->remove_interface(local_to_hw(local), &conf);
538 }
539
540 sdata->bss = NULL;
541
542 if (local->open_count == 0) {
543 if (netif_running(local->mdev))
544 dev_close(local->mdev);
545
546 if (local->ops->stop)
547 local->ops->stop(local_to_hw(local));
548
549 ieee80211_led_radio(local, 0);
550
551 flush_workqueue(local->hw.workqueue);
552
553 tasklet_disable(&local->tx_pending_tasklet);
554 tasklet_disable(&local->tasklet);
555 }
556
557 return 0;
558 }
559
560 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
561 {
562 struct ieee80211_local *local = hw_to_local(hw);
563 struct sta_info *sta;
564 struct ieee80211_sub_if_data *sdata;
565 u16 start_seq_num = 0;
566 u8 *state;
567 int ret;
568 DECLARE_MAC_BUF(mac);
569
570 if (tid >= STA_TID_NUM)
571 return -EINVAL;
572
573 #ifdef CONFIG_MAC80211_HT_DEBUG
574 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
575 print_mac(mac, ra), tid);
576 #endif /* CONFIG_MAC80211_HT_DEBUG */
577
578 rcu_read_lock();
579
580 sta = sta_info_get(local, ra);
581 if (!sta) {
582 #ifdef CONFIG_MAC80211_HT_DEBUG
583 printk(KERN_DEBUG "Could not find the station\n");
584 #endif
585 ret = -ENOENT;
586 goto exit;
587 }
588
589 spin_lock_bh(&sta->lock);
590
591 /* we have tried too many times, receiver does not want A-MPDU */
592 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
593 ret = -EBUSY;
594 goto err_unlock_sta;
595 }
596
597 state = &sta->ampdu_mlme.tid_state_tx[tid];
598 /* check if the TID is not in aggregation flow already */
599 if (*state != HT_AGG_STATE_IDLE) {
600 #ifdef CONFIG_MAC80211_HT_DEBUG
601 printk(KERN_DEBUG "BA request denied - session is not "
602 "idle on tid %u\n", tid);
603 #endif /* CONFIG_MAC80211_HT_DEBUG */
604 ret = -EAGAIN;
605 goto err_unlock_sta;
606 }
607
608 /* prepare A-MPDU MLME for Tx aggregation */
609 sta->ampdu_mlme.tid_tx[tid] =
610 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
611 if (!sta->ampdu_mlme.tid_tx[tid]) {
612 #ifdef CONFIG_MAC80211_HT_DEBUG
613 if (net_ratelimit())
614 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
615 tid);
616 #endif
617 ret = -ENOMEM;
618 goto err_unlock_sta;
619 }
620 /* Tx timer */
621 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
622 sta_addba_resp_timer_expired;
623 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
624 (unsigned long)&sta->timer_to_tid[tid];
625 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
626
627 /* create a new queue for this aggregation */
628 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
629
630 /* case no queue is available to aggregation
631 * don't switch to aggregation */
632 if (ret) {
633 #ifdef CONFIG_MAC80211_HT_DEBUG
634 printk(KERN_DEBUG "BA request denied - queue unavailable for"
635 " tid %d\n", tid);
636 #endif /* CONFIG_MAC80211_HT_DEBUG */
637 goto err_unlock_queue;
638 }
639 sdata = sta->sdata;
640
641 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
642 * call back right away, it must see that the flow has begun */
643 *state |= HT_ADDBA_REQUESTED_MSK;
644
645 if (local->ops->ampdu_action)
646 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
647 ra, tid, &start_seq_num);
648
649 if (ret) {
650 /* No need to requeue the packets in the agg queue, since we
651 * held the tx lock: no packet could be enqueued to the newly
652 * allocated queue */
653 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
654 #ifdef CONFIG_MAC80211_HT_DEBUG
655 printk(KERN_DEBUG "BA request denied - HW unavailable for"
656 " tid %d\n", tid);
657 #endif /* CONFIG_MAC80211_HT_DEBUG */
658 *state = HT_AGG_STATE_IDLE;
659 goto err_unlock_queue;
660 }
661
662 /* Will put all the packets in the new SW queue */
663 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
664 spin_unlock_bh(&sta->lock);
665
666 /* send an addBA request */
667 sta->ampdu_mlme.dialog_token_allocator++;
668 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
669 sta->ampdu_mlme.dialog_token_allocator;
670 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
671
672
673 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
674 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
675 sta->ampdu_mlme.tid_tx[tid]->ssn,
676 0x40, 5000);
677 /* activate the timer for the recipient's addBA response */
678 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
679 jiffies + ADDBA_RESP_INTERVAL;
680 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
681 #ifdef CONFIG_MAC80211_HT_DEBUG
682 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
683 #endif
684 goto exit;
685
686 err_unlock_queue:
687 kfree(sta->ampdu_mlme.tid_tx[tid]);
688 sta->ampdu_mlme.tid_tx[tid] = NULL;
689 ret = -EBUSY;
690 err_unlock_sta:
691 spin_unlock_bh(&sta->lock);
692 exit:
693 rcu_read_unlock();
694 return ret;
695 }
696 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
697
698 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
699 u8 *ra, u16 tid,
700 enum ieee80211_back_parties initiator)
701 {
702 struct ieee80211_local *local = hw_to_local(hw);
703 struct sta_info *sta;
704 u8 *state;
705 int ret = 0;
706 DECLARE_MAC_BUF(mac);
707
708 if (tid >= STA_TID_NUM)
709 return -EINVAL;
710
711 rcu_read_lock();
712 sta = sta_info_get(local, ra);
713 if (!sta) {
714 rcu_read_unlock();
715 return -ENOENT;
716 }
717
718 /* check if the TID is in aggregation */
719 state = &sta->ampdu_mlme.tid_state_tx[tid];
720 spin_lock_bh(&sta->lock);
721
722 if (*state != HT_AGG_STATE_OPERATIONAL) {
723 ret = -ENOENT;
724 goto stop_BA_exit;
725 }
726
727 #ifdef CONFIG_MAC80211_HT_DEBUG
728 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
729 print_mac(mac, ra), tid);
730 #endif /* CONFIG_MAC80211_HT_DEBUG */
731
732 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
733
734 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
735 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
736
737 if (local->ops->ampdu_action)
738 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
739 ra, tid, NULL);
740
741 /* case HW denied going back to legacy */
742 if (ret) {
743 WARN_ON(ret != -EBUSY);
744 *state = HT_AGG_STATE_OPERATIONAL;
745 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
746 goto stop_BA_exit;
747 }
748
749 stop_BA_exit:
750 spin_unlock_bh(&sta->lock);
751 rcu_read_unlock();
752 return ret;
753 }
754 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
755
756 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
757 {
758 struct ieee80211_local *local = hw_to_local(hw);
759 struct sta_info *sta;
760 u8 *state;
761 DECLARE_MAC_BUF(mac);
762
763 if (tid >= STA_TID_NUM) {
764 #ifdef CONFIG_MAC80211_HT_DEBUG
765 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
766 tid, STA_TID_NUM);
767 #endif
768 return;
769 }
770
771 rcu_read_lock();
772 sta = sta_info_get(local, ra);
773 if (!sta) {
774 rcu_read_unlock();
775 #ifdef CONFIG_MAC80211_HT_DEBUG
776 printk(KERN_DEBUG "Could not find station: %s\n",
777 print_mac(mac, ra));
778 #endif
779 return;
780 }
781
782 state = &sta->ampdu_mlme.tid_state_tx[tid];
783 spin_lock_bh(&sta->lock);
784
785 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
786 #ifdef CONFIG_MAC80211_HT_DEBUG
787 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
788 *state);
789 #endif
790 spin_unlock_bh(&sta->lock);
791 rcu_read_unlock();
792 return;
793 }
794
795 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
796
797 *state |= HT_ADDBA_DRV_READY_MSK;
798
799 if (*state == HT_AGG_STATE_OPERATIONAL) {
800 #ifdef CONFIG_MAC80211_HT_DEBUG
801 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
802 #endif
803 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
804 }
805 spin_unlock_bh(&sta->lock);
806 rcu_read_unlock();
807 }
808 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
809
810 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
811 {
812 struct ieee80211_local *local = hw_to_local(hw);
813 struct sta_info *sta;
814 u8 *state;
815 int agg_queue;
816 DECLARE_MAC_BUF(mac);
817
818 if (tid >= STA_TID_NUM) {
819 #ifdef CONFIG_MAC80211_HT_DEBUG
820 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
821 tid, STA_TID_NUM);
822 #endif
823 return;
824 }
825
826 #ifdef CONFIG_MAC80211_HT_DEBUG
827 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
828 print_mac(mac, ra), tid);
829 #endif /* CONFIG_MAC80211_HT_DEBUG */
830
831 rcu_read_lock();
832 sta = sta_info_get(local, ra);
833 if (!sta) {
834 #ifdef CONFIG_MAC80211_HT_DEBUG
835 printk(KERN_DEBUG "Could not find station: %s\n",
836 print_mac(mac, ra));
837 #endif
838 rcu_read_unlock();
839 return;
840 }
841 state = &sta->ampdu_mlme.tid_state_tx[tid];
842
843 /* NOTE: no need to use sta->lock in this state check, as
844 * ieee80211_stop_tx_ba_session will let only one stop call to
845 * pass through per sta/tid
846 */
847 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
848 #ifdef CONFIG_MAC80211_HT_DEBUG
849 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
850 #endif
851 rcu_read_unlock();
852 return;
853 }
854
855 if (*state & HT_AGG_STATE_INITIATOR_MSK)
856 ieee80211_send_delba(sta->sdata->dev, ra, tid,
857 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
858
859 agg_queue = sta->tid_to_tx_q[tid];
860
861 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
862
863 /* We just requeued the all the frames that were in the
864 * removed queue, and since we might miss a softirq we do
865 * netif_schedule_queue. ieee80211_wake_queue is not used
866 * here as this queue is not necessarily stopped
867 */
868 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
869 spin_lock_bh(&sta->lock);
870 *state = HT_AGG_STATE_IDLE;
871 sta->ampdu_mlme.addba_req_num[tid] = 0;
872 kfree(sta->ampdu_mlme.tid_tx[tid]);
873 sta->ampdu_mlme.tid_tx[tid] = NULL;
874 spin_unlock_bh(&sta->lock);
875
876 rcu_read_unlock();
877 }
878 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
879
880 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
881 const u8 *ra, u16 tid)
882 {
883 struct ieee80211_local *local = hw_to_local(hw);
884 struct ieee80211_ra_tid *ra_tid;
885 struct sk_buff *skb = dev_alloc_skb(0);
886
887 if (unlikely(!skb)) {
888 #ifdef CONFIG_MAC80211_HT_DEBUG
889 if (net_ratelimit())
890 printk(KERN_WARNING "%s: Not enough memory, "
891 "dropping start BA session", skb->dev->name);
892 #endif
893 return;
894 }
895 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
896 memcpy(&ra_tid->ra, ra, ETH_ALEN);
897 ra_tid->tid = tid;
898
899 skb->pkt_type = IEEE80211_ADDBA_MSG;
900 skb_queue_tail(&local->skb_queue, skb);
901 tasklet_schedule(&local->tasklet);
902 }
903 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
904
905 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
906 const u8 *ra, u16 tid)
907 {
908 struct ieee80211_local *local = hw_to_local(hw);
909 struct ieee80211_ra_tid *ra_tid;
910 struct sk_buff *skb = dev_alloc_skb(0);
911
912 if (unlikely(!skb)) {
913 #ifdef CONFIG_MAC80211_HT_DEBUG
914 if (net_ratelimit())
915 printk(KERN_WARNING "%s: Not enough memory, "
916 "dropping stop BA session", skb->dev->name);
917 #endif
918 return;
919 }
920 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
921 memcpy(&ra_tid->ra, ra, ETH_ALEN);
922 ra_tid->tid = tid;
923
924 skb->pkt_type = IEEE80211_DELBA_MSG;
925 skb_queue_tail(&local->skb_queue, skb);
926 tasklet_schedule(&local->tasklet);
927 }
928 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
929
930 static void ieee80211_set_multicast_list(struct net_device *dev)
931 {
932 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
933 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
934 int allmulti, promisc, sdata_allmulti, sdata_promisc;
935
936 allmulti = !!(dev->flags & IFF_ALLMULTI);
937 promisc = !!(dev->flags & IFF_PROMISC);
938 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
939 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
940
941 if (allmulti != sdata_allmulti) {
942 if (dev->flags & IFF_ALLMULTI)
943 atomic_inc(&local->iff_allmultis);
944 else
945 atomic_dec(&local->iff_allmultis);
946 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
947 }
948
949 if (promisc != sdata_promisc) {
950 if (dev->flags & IFF_PROMISC)
951 atomic_inc(&local->iff_promiscs);
952 else
953 atomic_dec(&local->iff_promiscs);
954 sdata->flags ^= IEEE80211_SDATA_PROMISC;
955 }
956
957 dev_mc_sync(local->mdev, dev);
958 }
959
960 static const struct header_ops ieee80211_header_ops = {
961 .create = eth_header,
962 .parse = header_parse_80211,
963 .rebuild = eth_rebuild_header,
964 .cache = eth_header_cache,
965 .cache_update = eth_header_cache_update,
966 };
967
968 void ieee80211_if_setup(struct net_device *dev)
969 {
970 ether_setup(dev);
971 dev->hard_start_xmit = ieee80211_subif_start_xmit;
972 dev->wireless_handlers = &ieee80211_iw_handler_def;
973 dev->set_multicast_list = ieee80211_set_multicast_list;
974 dev->change_mtu = ieee80211_change_mtu;
975 dev->open = ieee80211_open;
976 dev->stop = ieee80211_stop;
977 dev->destructor = free_netdev;
978 }
979
980 /* everything else */
981
982 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
983 {
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_if_conf conf;
986
987 if (WARN_ON(!netif_running(sdata->dev)))
988 return 0;
989
990 if (!local->ops->config_interface)
991 return 0;
992
993 memset(&conf, 0, sizeof(conf));
994 conf.changed = changed;
995
996 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
997 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
998 conf.bssid = sdata->u.sta.bssid;
999 conf.ssid = sdata->u.sta.ssid;
1000 conf.ssid_len = sdata->u.sta.ssid_len;
1001 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1002 conf.bssid = sdata->dev->dev_addr;
1003 conf.ssid = sdata->u.ap.ssid;
1004 conf.ssid_len = sdata->u.ap.ssid_len;
1005 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1006 u8 zero[ETH_ALEN] = { 0 };
1007 conf.bssid = zero;
1008 conf.ssid = zero;
1009 conf.ssid_len = 0;
1010 } else {
1011 WARN_ON(1);
1012 return -EINVAL;
1013 }
1014
1015 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1016 return -EINVAL;
1017
1018 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1019 return -EINVAL;
1020
1021 return local->ops->config_interface(local_to_hw(local),
1022 &sdata->vif, &conf);
1023 }
1024
1025 int ieee80211_hw_config(struct ieee80211_local *local)
1026 {
1027 struct ieee80211_channel *chan;
1028 int ret = 0;
1029
1030 if (local->sta_sw_scanning)
1031 chan = local->scan_channel;
1032 else
1033 chan = local->oper_channel;
1034
1035 local->hw.conf.channel = chan;
1036
1037 if (!local->hw.conf.power_level)
1038 local->hw.conf.power_level = chan->max_power;
1039 else
1040 local->hw.conf.power_level = min(chan->max_power,
1041 local->hw.conf.power_level);
1042
1043 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1044
1045 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1046 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1047 wiphy_name(local->hw.wiphy), chan->center_freq);
1048 #endif
1049
1050 if (local->open_count)
1051 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1052
1053 return ret;
1054 }
1055
1056 /**
1057 * ieee80211_handle_ht should be used only after legacy configuration
1058 * has been determined namely band, as ht configuration depends upon
1059 * the hardware's HT abilities for a _specific_ band.
1060 */
1061 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1062 struct ieee80211_ht_info *req_ht_cap,
1063 struct ieee80211_ht_bss_info *req_bss_cap)
1064 {
1065 struct ieee80211_conf *conf = &local->hw.conf;
1066 struct ieee80211_supported_band *sband;
1067 struct ieee80211_ht_info ht_conf;
1068 struct ieee80211_ht_bss_info ht_bss_conf;
1069 u32 changed = 0;
1070 int i;
1071 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1072 u8 tx_mcs_set_cap;
1073
1074 sband = local->hw.wiphy->bands[conf->channel->band];
1075
1076 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1077 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1078
1079 /* HT is not supported */
1080 if (!sband->ht_info.ht_supported) {
1081 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1082 goto out;
1083 }
1084
1085 /* disable HT */
1086 if (!enable_ht) {
1087 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1088 changed |= BSS_CHANGED_HT;
1089 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1090 conf->ht_conf.ht_supported = 0;
1091 goto out;
1092 }
1093
1094
1095 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1096 changed |= BSS_CHANGED_HT;
1097
1098 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1099 ht_conf.ht_supported = 1;
1100
1101 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1102 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1103 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1104 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1105 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1106 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1107
1108 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1109 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1110
1111 /* Bits 96-100 */
1112 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1113
1114 /* configure suppoerted Tx MCS according to requested MCS
1115 * (based in most cases on Rx capabilities of peer) and self
1116 * Tx MCS capabilities (as defined by low level driver HW
1117 * Tx capabilities) */
1118 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1119 goto check_changed;
1120
1121 /* Counting from 0 therfore + 1 */
1122 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1123 max_tx_streams = ((tx_mcs_set_cap &
1124 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1125
1126 for (i = 0; i < max_tx_streams; i++)
1127 ht_conf.supp_mcs_set[i] =
1128 sband->ht_info.supp_mcs_set[i] &
1129 req_ht_cap->supp_mcs_set[i];
1130
1131 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1132 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1133 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1134 ht_conf.supp_mcs_set[i] =
1135 sband->ht_info.supp_mcs_set[i] &
1136 req_ht_cap->supp_mcs_set[i];
1137
1138 check_changed:
1139 /* if bss configuration changed store the new one */
1140 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1141 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1142 changed |= BSS_CHANGED_HT;
1143 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1144 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1145 }
1146 out:
1147 return changed;
1148 }
1149
1150 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1151 u32 changed)
1152 {
1153 struct ieee80211_local *local = sdata->local;
1154
1155 if (!changed)
1156 return;
1157
1158 if (local->ops->bss_info_changed)
1159 local->ops->bss_info_changed(local_to_hw(local),
1160 &sdata->vif,
1161 &sdata->bss_conf,
1162 changed);
1163 }
1164
1165 u32 ieee80211_reset_erp_info(struct net_device *dev)
1166 {
1167 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1168
1169 sdata->bss_conf.use_cts_prot = 0;
1170 sdata->bss_conf.use_short_preamble = 0;
1171 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1172 }
1173
1174 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1175 struct sk_buff *skb)
1176 {
1177 struct ieee80211_local *local = hw_to_local(hw);
1178 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1179 int tmp;
1180
1181 skb->dev = local->mdev;
1182 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1183 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1184 &local->skb_queue : &local->skb_queue_unreliable, skb);
1185 tmp = skb_queue_len(&local->skb_queue) +
1186 skb_queue_len(&local->skb_queue_unreliable);
1187 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1188 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1189 dev_kfree_skb_irq(skb);
1190 tmp--;
1191 I802_DEBUG_INC(local->tx_status_drop);
1192 }
1193 tasklet_schedule(&local->tasklet);
1194 }
1195 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1196
1197 static void ieee80211_tasklet_handler(unsigned long data)
1198 {
1199 struct ieee80211_local *local = (struct ieee80211_local *) data;
1200 struct sk_buff *skb;
1201 struct ieee80211_rx_status rx_status;
1202 struct ieee80211_ra_tid *ra_tid;
1203
1204 while ((skb = skb_dequeue(&local->skb_queue)) ||
1205 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1206 switch (skb->pkt_type) {
1207 case IEEE80211_RX_MSG:
1208 /* status is in skb->cb */
1209 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1210 /* Clear skb->pkt_type in order to not confuse kernel
1211 * netstack. */
1212 skb->pkt_type = 0;
1213 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1214 break;
1215 case IEEE80211_TX_STATUS_MSG:
1216 skb->pkt_type = 0;
1217 ieee80211_tx_status(local_to_hw(local), skb);
1218 break;
1219 case IEEE80211_DELBA_MSG:
1220 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1221 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1222 ra_tid->ra, ra_tid->tid);
1223 dev_kfree_skb(skb);
1224 break;
1225 case IEEE80211_ADDBA_MSG:
1226 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1227 ieee80211_start_tx_ba_cb(local_to_hw(local),
1228 ra_tid->ra, ra_tid->tid);
1229 dev_kfree_skb(skb);
1230 break ;
1231 default:
1232 WARN_ON(1);
1233 dev_kfree_skb(skb);
1234 break;
1235 }
1236 }
1237 }
1238
1239 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1240 * make a prepared TX frame (one that has been given to hw) to look like brand
1241 * new IEEE 802.11 frame that is ready to go through TX processing again.
1242 */
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1244 struct ieee80211_key *key,
1245 struct sk_buff *skb)
1246 {
1247 int hdrlen, iv_len, mic_len;
1248
1249 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1250
1251 if (!key)
1252 goto no_key;
1253
1254 switch (key->conf.alg) {
1255 case ALG_WEP:
1256 iv_len = WEP_IV_LEN;
1257 mic_len = WEP_ICV_LEN;
1258 break;
1259 case ALG_TKIP:
1260 iv_len = TKIP_IV_LEN;
1261 mic_len = TKIP_ICV_LEN;
1262 break;
1263 case ALG_CCMP:
1264 iv_len = CCMP_HDR_LEN;
1265 mic_len = CCMP_MIC_LEN;
1266 break;
1267 default:
1268 goto no_key;
1269 }
1270
1271 if (skb->len >= mic_len &&
1272 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1273 skb_trim(skb, skb->len - mic_len);
1274 if (skb->len >= iv_len && skb->len > hdrlen) {
1275 memmove(skb->data + iv_len, skb->data, hdrlen);
1276 skb_pull(skb, iv_len);
1277 }
1278
1279 no_key:
1280 {
1281 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1282 u16 fc = le16_to_cpu(hdr->frame_control);
1283 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1284 fc &= ~IEEE80211_STYPE_QOS_DATA;
1285 hdr->frame_control = cpu_to_le16(fc);
1286 memmove(skb->data + 2, skb->data, hdrlen - 2);
1287 skb_pull(skb, 2);
1288 }
1289 }
1290 }
1291
1292 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1293 struct sta_info *sta,
1294 struct sk_buff *skb)
1295 {
1296 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1297
1298 sta->tx_filtered_count++;
1299
1300 /*
1301 * Clear the TX filter mask for this STA when sending the next
1302 * packet. If the STA went to power save mode, this will happen
1303 * when it wakes up for the next time.
1304 */
1305 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1306
1307 /*
1308 * This code races in the following way:
1309 *
1310 * (1) STA sends frame indicating it will go to sleep and does so
1311 * (2) hardware/firmware adds STA to filter list, passes frame up
1312 * (3) hardware/firmware processes TX fifo and suppresses a frame
1313 * (4) we get TX status before having processed the frame and
1314 * knowing that the STA has gone to sleep.
1315 *
1316 * This is actually quite unlikely even when both those events are
1317 * processed from interrupts coming in quickly after one another or
1318 * even at the same time because we queue both TX status events and
1319 * RX frames to be processed by a tasklet and process them in the
1320 * same order that they were received or TX status last. Hence, there
1321 * is no race as long as the frame RX is processed before the next TX
1322 * status, which drivers can ensure, see below.
1323 *
1324 * Note that this can only happen if the hardware or firmware can
1325 * actually add STAs to the filter list, if this is done by the
1326 * driver in response to set_tim() (which will only reduce the race
1327 * this whole filtering tries to solve, not completely solve it)
1328 * this situation cannot happen.
1329 *
1330 * To completely solve this race drivers need to make sure that they
1331 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1332 * functions and
1333 * (b) always process RX events before TX status events if ordering
1334 * can be unknown, for example with different interrupt status
1335 * bits.
1336 */
1337 if (test_sta_flags(sta, WLAN_STA_PS) &&
1338 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1339 ieee80211_remove_tx_extra(local, sta->key, skb);
1340 skb_queue_tail(&sta->tx_filtered, skb);
1341 return;
1342 }
1343
1344 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1345 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1346 /* Software retry the packet once */
1347 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1348 ieee80211_remove_tx_extra(local, sta->key, skb);
1349 dev_queue_xmit(skb);
1350 return;
1351 }
1352
1353 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1354 if (net_ratelimit())
1355 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1356 "queue_len=%d PS=%d @%lu\n",
1357 wiphy_name(local->hw.wiphy),
1358 skb_queue_len(&sta->tx_filtered),
1359 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1360 #endif
1361 dev_kfree_skb(skb);
1362 }
1363
1364 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1365 {
1366 struct sk_buff *skb2;
1367 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1368 struct ieee80211_local *local = hw_to_local(hw);
1369 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1370 u16 frag, type;
1371 __le16 fc;
1372 struct ieee80211_tx_status_rtap_hdr *rthdr;
1373 struct ieee80211_sub_if_data *sdata;
1374 struct net_device *prev_dev = NULL;
1375 struct sta_info *sta;
1376
1377 rcu_read_lock();
1378
1379 if (info->status.excessive_retries) {
1380 sta = sta_info_get(local, hdr->addr1);
1381 if (sta) {
1382 if (test_sta_flags(sta, WLAN_STA_PS)) {
1383 /*
1384 * The STA is in power save mode, so assume
1385 * that this TX packet failed because of that.
1386 */
1387 ieee80211_handle_filtered_frame(local, sta, skb);
1388 rcu_read_unlock();
1389 return;
1390 }
1391 }
1392 }
1393
1394 fc = hdr->frame_control;
1395
1396 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1397 (ieee80211_is_data_qos(fc))) {
1398 u16 tid, ssn;
1399 u8 *qc;
1400 sta = sta_info_get(local, hdr->addr1);
1401 if (sta) {
1402 qc = ieee80211_get_qos_ctl(hdr);
1403 tid = qc[0] & 0xf;
1404 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1405 & IEEE80211_SCTL_SEQ);
1406 ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1407 tid, ssn);
1408 }
1409 }
1410
1411 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1412 sta = sta_info_get(local, hdr->addr1);
1413 if (sta) {
1414 ieee80211_handle_filtered_frame(local, sta, skb);
1415 rcu_read_unlock();
1416 return;
1417 }
1418 } else
1419 rate_control_tx_status(local->mdev, skb);
1420
1421 rcu_read_unlock();
1422
1423 ieee80211_led_tx(local, 0);
1424
1425 /* SNMP counters
1426 * Fragments are passed to low-level drivers as separate skbs, so these
1427 * are actually fragments, not frames. Update frame counters only for
1428 * the first fragment of the frame. */
1429
1430 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1431 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1432
1433 if (info->flags & IEEE80211_TX_STAT_ACK) {
1434 if (frag == 0) {
1435 local->dot11TransmittedFrameCount++;
1436 if (is_multicast_ether_addr(hdr->addr1))
1437 local->dot11MulticastTransmittedFrameCount++;
1438 if (info->status.retry_count > 0)
1439 local->dot11RetryCount++;
1440 if (info->status.retry_count > 1)
1441 local->dot11MultipleRetryCount++;
1442 }
1443
1444 /* This counter shall be incremented for an acknowledged MPDU
1445 * with an individual address in the address 1 field or an MPDU
1446 * with a multicast address in the address 1 field of type Data
1447 * or Management. */
1448 if (!is_multicast_ether_addr(hdr->addr1) ||
1449 type == IEEE80211_FTYPE_DATA ||
1450 type == IEEE80211_FTYPE_MGMT)
1451 local->dot11TransmittedFragmentCount++;
1452 } else {
1453 if (frag == 0)
1454 local->dot11FailedCount++;
1455 }
1456
1457 /* this was a transmitted frame, but now we want to reuse it */
1458 skb_orphan(skb);
1459
1460 /*
1461 * This is a bit racy but we can avoid a lot of work
1462 * with this test...
1463 */
1464 if (!local->monitors && !local->cooked_mntrs) {
1465 dev_kfree_skb(skb);
1466 return;
1467 }
1468
1469 /* send frame to monitor interfaces now */
1470
1471 if (skb_headroom(skb) < sizeof(*rthdr)) {
1472 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1473 dev_kfree_skb(skb);
1474 return;
1475 }
1476
1477 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1478 skb_push(skb, sizeof(*rthdr));
1479
1480 memset(rthdr, 0, sizeof(*rthdr));
1481 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1482 rthdr->hdr.it_present =
1483 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1484 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1485
1486 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1487 !is_multicast_ether_addr(hdr->addr1))
1488 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1489
1490 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1491 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1492 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1493 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1494 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1495
1496 rthdr->data_retries = info->status.retry_count;
1497
1498 /* XXX: is this sufficient for BPF? */
1499 skb_set_mac_header(skb, 0);
1500 skb->ip_summed = CHECKSUM_UNNECESSARY;
1501 skb->pkt_type = PACKET_OTHERHOST;
1502 skb->protocol = htons(ETH_P_802_2);
1503 memset(skb->cb, 0, sizeof(skb->cb));
1504
1505 rcu_read_lock();
1506 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1507 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1508 if (!netif_running(sdata->dev))
1509 continue;
1510
1511 if (prev_dev) {
1512 skb2 = skb_clone(skb, GFP_ATOMIC);
1513 if (skb2) {
1514 skb2->dev = prev_dev;
1515 netif_rx(skb2);
1516 }
1517 }
1518
1519 prev_dev = sdata->dev;
1520 }
1521 }
1522 if (prev_dev) {
1523 skb->dev = prev_dev;
1524 netif_rx(skb);
1525 skb = NULL;
1526 }
1527 rcu_read_unlock();
1528 dev_kfree_skb(skb);
1529 }
1530 EXPORT_SYMBOL(ieee80211_tx_status);
1531
1532 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1533 const struct ieee80211_ops *ops)
1534 {
1535 struct ieee80211_local *local;
1536 int priv_size;
1537 struct wiphy *wiphy;
1538
1539 /* Ensure 32-byte alignment of our private data and hw private data.
1540 * We use the wiphy priv data for both our ieee80211_local and for
1541 * the driver's private data
1542 *
1543 * In memory it'll be like this:
1544 *
1545 * +-------------------------+
1546 * | struct wiphy |
1547 * +-------------------------+
1548 * | struct ieee80211_local |
1549 * +-------------------------+
1550 * | driver's private data |
1551 * +-------------------------+
1552 *
1553 */
1554 priv_size = ((sizeof(struct ieee80211_local) +
1555 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1556 priv_data_len;
1557
1558 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1559
1560 if (!wiphy)
1561 return NULL;
1562
1563 wiphy->privid = mac80211_wiphy_privid;
1564
1565 local = wiphy_priv(wiphy);
1566 local->hw.wiphy = wiphy;
1567
1568 local->hw.priv = (char *)local +
1569 ((sizeof(struct ieee80211_local) +
1570 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1571
1572 BUG_ON(!ops->tx);
1573 BUG_ON(!ops->start);
1574 BUG_ON(!ops->stop);
1575 BUG_ON(!ops->config);
1576 BUG_ON(!ops->add_interface);
1577 BUG_ON(!ops->remove_interface);
1578 BUG_ON(!ops->configure_filter);
1579 local->ops = ops;
1580
1581 local->hw.queues = 1; /* default */
1582
1583 local->bridge_packets = 1;
1584
1585 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1586 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1587 local->short_retry_limit = 7;
1588 local->long_retry_limit = 4;
1589 local->hw.conf.radio_enabled = 1;
1590
1591 INIT_LIST_HEAD(&local->interfaces);
1592
1593 spin_lock_init(&local->key_lock);
1594
1595 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1596
1597 sta_info_init(local);
1598
1599 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1600 (unsigned long)local);
1601 tasklet_disable(&local->tx_pending_tasklet);
1602
1603 tasklet_init(&local->tasklet,
1604 ieee80211_tasklet_handler,
1605 (unsigned long) local);
1606 tasklet_disable(&local->tasklet);
1607
1608 skb_queue_head_init(&local->skb_queue);
1609 skb_queue_head_init(&local->skb_queue_unreliable);
1610
1611 return local_to_hw(local);
1612 }
1613 EXPORT_SYMBOL(ieee80211_alloc_hw);
1614
1615 int ieee80211_register_hw(struct ieee80211_hw *hw)
1616 {
1617 struct ieee80211_local *local = hw_to_local(hw);
1618 const char *name;
1619 int result;
1620 enum ieee80211_band band;
1621 struct net_device *mdev;
1622 struct wireless_dev *mwdev;
1623
1624 /*
1625 * generic code guarantees at least one band,
1626 * set this very early because much code assumes
1627 * that hw.conf.channel is assigned
1628 */
1629 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1630 struct ieee80211_supported_band *sband;
1631
1632 sband = local->hw.wiphy->bands[band];
1633 if (sband) {
1634 /* init channel we're on */
1635 local->hw.conf.channel =
1636 local->oper_channel =
1637 local->scan_channel = &sband->channels[0];
1638 break;
1639 }
1640 }
1641
1642 result = wiphy_register(local->hw.wiphy);
1643 if (result < 0)
1644 return result;
1645
1646 /*
1647 * We use the number of queues for feature tests (QoS, HT) internally
1648 * so restrict them appropriately.
1649 */
1650 if (hw->queues > IEEE80211_MAX_QUEUES)
1651 hw->queues = IEEE80211_MAX_QUEUES;
1652 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1653 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1654 if (hw->queues < 4)
1655 hw->ampdu_queues = 0;
1656
1657 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1658 "wmaster%d", ether_setup,
1659 ieee80211_num_queues(hw));
1660 if (!mdev)
1661 goto fail_mdev_alloc;
1662
1663 mwdev = netdev_priv(mdev);
1664 mdev->ieee80211_ptr = mwdev;
1665 mwdev->wiphy = local->hw.wiphy;
1666
1667 local->mdev = mdev;
1668
1669 ieee80211_rx_bss_list_init(local);
1670
1671 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1672 mdev->open = ieee80211_master_open;
1673 mdev->stop = ieee80211_master_stop;
1674 mdev->type = ARPHRD_IEEE80211;
1675 mdev->header_ops = &ieee80211_header_ops;
1676 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1677
1678 name = wiphy_dev(local->hw.wiphy)->driver->name;
1679 local->hw.workqueue = create_freezeable_workqueue(name);
1680 if (!local->hw.workqueue) {
1681 result = -ENOMEM;
1682 goto fail_workqueue;
1683 }
1684
1685 /*
1686 * The hardware needs headroom for sending the frame,
1687 * and we need some headroom for passing the frame to monitor
1688 * interfaces, but never both at the same time.
1689 */
1690 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1691 sizeof(struct ieee80211_tx_status_rtap_hdr));
1692
1693 debugfs_hw_add(local);
1694
1695 if (local->hw.conf.beacon_int < 10)
1696 local->hw.conf.beacon_int = 100;
1697
1698 if (local->hw.max_listen_interval == 0)
1699 local->hw.max_listen_interval = 1;
1700
1701 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1702
1703 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1704 IEEE80211_HW_SIGNAL_DB |
1705 IEEE80211_HW_SIGNAL_DBM) ?
1706 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1707 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1708 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1709 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1710 local->wstats_flags |= IW_QUAL_DBM;
1711
1712 result = sta_info_start(local);
1713 if (result < 0)
1714 goto fail_sta_info;
1715
1716 rtnl_lock();
1717 result = dev_alloc_name(local->mdev, local->mdev->name);
1718 if (result < 0)
1719 goto fail_dev;
1720
1721 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1722 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1723
1724 result = register_netdevice(local->mdev);
1725 if (result < 0)
1726 goto fail_dev;
1727
1728 result = ieee80211_init_rate_ctrl_alg(local,
1729 hw->rate_control_algorithm);
1730 if (result < 0) {
1731 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1732 "algorithm\n", wiphy_name(local->hw.wiphy));
1733 goto fail_rate;
1734 }
1735
1736 result = ieee80211_wep_init(local);
1737
1738 if (result < 0) {
1739 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1740 wiphy_name(local->hw.wiphy), result);
1741 goto fail_wep;
1742 }
1743
1744 local->mdev->select_queue = ieee80211_select_queue;
1745
1746 /* add one default STA interface */
1747 result = ieee80211_if_add(local, "wlan%d", NULL,
1748 IEEE80211_IF_TYPE_STA, NULL);
1749 if (result)
1750 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1751 wiphy_name(local->hw.wiphy));
1752
1753 rtnl_unlock();
1754
1755 ieee80211_led_init(local);
1756
1757 return 0;
1758
1759 fail_wep:
1760 rate_control_deinitialize(local);
1761 fail_rate:
1762 unregister_netdevice(local->mdev);
1763 local->mdev = NULL;
1764 fail_dev:
1765 rtnl_unlock();
1766 sta_info_stop(local);
1767 fail_sta_info:
1768 debugfs_hw_del(local);
1769 destroy_workqueue(local->hw.workqueue);
1770 fail_workqueue:
1771 if (local->mdev)
1772 free_netdev(local->mdev);
1773 fail_mdev_alloc:
1774 wiphy_unregister(local->hw.wiphy);
1775 return result;
1776 }
1777 EXPORT_SYMBOL(ieee80211_register_hw);
1778
1779 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1780 {
1781 struct ieee80211_local *local = hw_to_local(hw);
1782
1783 tasklet_kill(&local->tx_pending_tasklet);
1784 tasklet_kill(&local->tasklet);
1785
1786 rtnl_lock();
1787
1788 /*
1789 * At this point, interface list manipulations are fine
1790 * because the driver cannot be handing us frames any
1791 * more and the tasklet is killed.
1792 */
1793
1794 /* First, we remove all virtual interfaces. */
1795 ieee80211_remove_interfaces(local);
1796
1797 /* then, finally, remove the master interface */
1798 unregister_netdevice(local->mdev);
1799
1800 rtnl_unlock();
1801
1802 ieee80211_rx_bss_list_deinit(local);
1803 ieee80211_clear_tx_pending(local);
1804 sta_info_stop(local);
1805 rate_control_deinitialize(local);
1806 debugfs_hw_del(local);
1807
1808 if (skb_queue_len(&local->skb_queue)
1809 || skb_queue_len(&local->skb_queue_unreliable))
1810 printk(KERN_WARNING "%s: skb_queue not empty\n",
1811 wiphy_name(local->hw.wiphy));
1812 skb_queue_purge(&local->skb_queue);
1813 skb_queue_purge(&local->skb_queue_unreliable);
1814
1815 destroy_workqueue(local->hw.workqueue);
1816 wiphy_unregister(local->hw.wiphy);
1817 ieee80211_wep_free(local);
1818 ieee80211_led_exit(local);
1819 free_netdev(local->mdev);
1820 }
1821 EXPORT_SYMBOL(ieee80211_unregister_hw);
1822
1823 void ieee80211_free_hw(struct ieee80211_hw *hw)
1824 {
1825 struct ieee80211_local *local = hw_to_local(hw);
1826
1827 wiphy_free(local->hw.wiphy);
1828 }
1829 EXPORT_SYMBOL(ieee80211_free_hw);
1830
1831 static int __init ieee80211_init(void)
1832 {
1833 struct sk_buff *skb;
1834 int ret;
1835
1836 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1837 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1838 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1839
1840 ret = rc80211_pid_init();
1841 if (ret)
1842 return ret;
1843
1844 ieee80211_debugfs_netdev_init();
1845
1846 return 0;
1847 }
1848
1849 static void __exit ieee80211_exit(void)
1850 {
1851 rc80211_pid_exit();
1852
1853 /*
1854 * For key todo, it'll be empty by now but the work
1855 * might still be scheduled.
1856 */
1857 flush_scheduled_work();
1858
1859 if (mesh_allocated)
1860 ieee80211s_stop();
1861
1862 ieee80211_debugfs_netdev_exit();
1863 }
1864
1865
1866 subsys_initcall(ieee80211_init);
1867 module_exit(ieee80211_exit);
1868
1869 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1870 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree