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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / mac80211 / ieee80211.c
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 "ieee80211_rate.h"
29 #include "mesh.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "ieee80211_led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 #define SUPP_MCS_SET_LEN 16
39
40 /*
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
43 */
44 struct ieee80211_tx_status_rtap_hdr {
45 struct ieee80211_radiotap_header hdr;
46 __le16 tx_flags;
47 u8 data_retries;
48 } __attribute__ ((packed));
49
50 /* common interface routines */
51
52 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
53 {
54 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
55 return ETH_ALEN;
56 }
57
58 /* must be called under mdev tx lock */
59 static void ieee80211_configure_filter(struct ieee80211_local *local)
60 {
61 unsigned int changed_flags;
62 unsigned int new_flags = 0;
63
64 if (atomic_read(&local->iff_promiscs))
65 new_flags |= FIF_PROMISC_IN_BSS;
66
67 if (atomic_read(&local->iff_allmultis))
68 new_flags |= FIF_ALLMULTI;
69
70 if (local->monitors)
71 new_flags |= FIF_BCN_PRBRESP_PROMISC;
72
73 if (local->fif_fcsfail)
74 new_flags |= FIF_FCSFAIL;
75
76 if (local->fif_plcpfail)
77 new_flags |= FIF_PLCPFAIL;
78
79 if (local->fif_control)
80 new_flags |= FIF_CONTROL;
81
82 if (local->fif_other_bss)
83 new_flags |= FIF_OTHER_BSS;
84
85 changed_flags = local->filter_flags ^ new_flags;
86
87 /* be a bit nasty */
88 new_flags |= (1<<31);
89
90 local->ops->configure_filter(local_to_hw(local),
91 changed_flags, &new_flags,
92 local->mdev->mc_count,
93 local->mdev->mc_list);
94
95 WARN_ON(new_flags & (1<<31));
96
97 local->filter_flags = new_flags & ~(1<<31);
98 }
99
100 /* master interface */
101
102 static int ieee80211_master_open(struct net_device *dev)
103 {
104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
105 struct ieee80211_sub_if_data *sdata;
106 int res = -EOPNOTSUPP;
107
108 /* we hold the RTNL here so can safely walk the list */
109 list_for_each_entry(sdata, &local->interfaces, list) {
110 if (sdata->dev != dev && netif_running(sdata->dev)) {
111 res = 0;
112 break;
113 }
114 }
115 return res;
116 }
117
118 static int ieee80211_master_stop(struct net_device *dev)
119 {
120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
121 struct ieee80211_sub_if_data *sdata;
122
123 /* we hold the RTNL here so can safely walk the list */
124 list_for_each_entry(sdata, &local->interfaces, list)
125 if (sdata->dev != dev && netif_running(sdata->dev))
126 dev_close(sdata->dev);
127
128 return 0;
129 }
130
131 static void ieee80211_master_set_multicast_list(struct net_device *dev)
132 {
133 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
134
135 ieee80211_configure_filter(local);
136 }
137
138 /* regular interfaces */
139
140 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
141 {
142 int meshhdrlen;
143 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
144
145 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
146
147 /* FIX: what would be proper limits for MTU?
148 * This interface uses 802.3 frames. */
149 if (new_mtu < 256 ||
150 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
151 printk(KERN_WARNING "%s: invalid MTU %d\n",
152 dev->name, new_mtu);
153 return -EINVAL;
154 }
155
156 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
157 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
158 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
159 dev->mtu = new_mtu;
160 return 0;
161 }
162
163 static inline int identical_mac_addr_allowed(int type1, int type2)
164 {
165 return (type1 == IEEE80211_IF_TYPE_MNTR ||
166 type2 == IEEE80211_IF_TYPE_MNTR ||
167 (type1 == IEEE80211_IF_TYPE_AP &&
168 type2 == IEEE80211_IF_TYPE_WDS) ||
169 (type1 == IEEE80211_IF_TYPE_WDS &&
170 (type2 == IEEE80211_IF_TYPE_WDS ||
171 type2 == IEEE80211_IF_TYPE_AP)) ||
172 (type1 == IEEE80211_IF_TYPE_AP &&
173 type2 == IEEE80211_IF_TYPE_VLAN) ||
174 (type1 == IEEE80211_IF_TYPE_VLAN &&
175 (type2 == IEEE80211_IF_TYPE_AP ||
176 type2 == IEEE80211_IF_TYPE_VLAN)));
177 }
178
179 static int ieee80211_open(struct net_device *dev)
180 {
181 struct ieee80211_sub_if_data *sdata, *nsdata;
182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
183 struct ieee80211_if_init_conf conf;
184 int res;
185 bool need_hw_reconfig = 0;
186 struct sta_info *sta;
187
188 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
189
190 /* we hold the RTNL here so can safely walk the list */
191 list_for_each_entry(nsdata, &local->interfaces, list) {
192 struct net_device *ndev = nsdata->dev;
193
194 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
195 /*
196 * Allow only a single IBSS interface to be up at any
197 * time. This is restricted because beacon distribution
198 * cannot work properly if both are in the same IBSS.
199 *
200 * To remove this restriction we'd have to disallow them
201 * from setting the same SSID on different IBSS interfaces
202 * belonging to the same hardware. Then, however, we're
203 * faced with having to adopt two different TSF timers...
204 */
205 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
206 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
207 return -EBUSY;
208
209 /*
210 * Disallow multiple IBSS/STA mode interfaces.
211 *
212 * This is a technical restriction, it is possible although
213 * most likely not IEEE 802.11 compliant to have multiple
214 * STAs with just a single hardware (the TSF timer will not
215 * be adjusted properly.)
216 *
217 * However, because mac80211 uses the master device's BSS
218 * information for each STA/IBSS interface, doing this will
219 * currently corrupt that BSS information completely, unless,
220 * a not very useful case, both STAs are associated to the
221 * same BSS.
222 *
223 * To remove this restriction, the BSS information needs to
224 * be embedded in the STA/IBSS mode sdata instead of using
225 * the master device's BSS structure.
226 */
227 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
228 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
229 (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
230 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
231 return -EBUSY;
232
233 /*
234 * The remaining checks are only performed for interfaces
235 * with the same MAC address.
236 */
237 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
238 continue;
239
240 /*
241 * check whether it may have the same address
242 */
243 if (!identical_mac_addr_allowed(sdata->vif.type,
244 nsdata->vif.type))
245 return -ENOTUNIQ;
246
247 /*
248 * can only add VLANs to enabled APs
249 */
250 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
251 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
252 sdata->u.vlan.ap = nsdata;
253 }
254 }
255
256 switch (sdata->vif.type) {
257 case IEEE80211_IF_TYPE_WDS:
258 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
259 return -ENOLINK;
260
261 /* Create STA entry for the WDS peer */
262 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
263 GFP_KERNEL);
264 if (!sta)
265 return -ENOMEM;
266
267 sta->flags |= WLAN_STA_AUTHORIZED;
268
269 res = sta_info_insert(sta);
270 if (res) {
271 /* STA has been freed */
272 return res;
273 }
274 break;
275 case IEEE80211_IF_TYPE_VLAN:
276 if (!sdata->u.vlan.ap)
277 return -ENOLINK;
278 break;
279 case IEEE80211_IF_TYPE_AP:
280 case IEEE80211_IF_TYPE_STA:
281 case IEEE80211_IF_TYPE_MNTR:
282 case IEEE80211_IF_TYPE_IBSS:
283 case IEEE80211_IF_TYPE_MESH_POINT:
284 /* no special treatment */
285 break;
286 case IEEE80211_IF_TYPE_INVALID:
287 /* cannot happen */
288 WARN_ON(1);
289 break;
290 }
291
292 if (local->open_count == 0) {
293 res = 0;
294 if (local->ops->start)
295 res = local->ops->start(local_to_hw(local));
296 if (res)
297 return res;
298 need_hw_reconfig = 1;
299 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
300 }
301
302 switch (sdata->vif.type) {
303 case IEEE80211_IF_TYPE_VLAN:
304 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
305 /* no need to tell driver */
306 break;
307 case IEEE80211_IF_TYPE_MNTR:
308 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
309 local->cooked_mntrs++;
310 break;
311 }
312
313 /* must be before the call to ieee80211_configure_filter */
314 local->monitors++;
315 if (local->monitors == 1)
316 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
317
318 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
319 local->fif_fcsfail++;
320 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
321 local->fif_plcpfail++;
322 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
323 local->fif_control++;
324 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
325 local->fif_other_bss++;
326
327 netif_tx_lock_bh(local->mdev);
328 ieee80211_configure_filter(local);
329 netif_tx_unlock_bh(local->mdev);
330 break;
331 case IEEE80211_IF_TYPE_STA:
332 case IEEE80211_IF_TYPE_IBSS:
333 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
334 /* fall through */
335 default:
336 conf.vif = &sdata->vif;
337 conf.type = sdata->vif.type;
338 conf.mac_addr = dev->dev_addr;
339 res = local->ops->add_interface(local_to_hw(local), &conf);
340 if (res && !local->open_count && local->ops->stop)
341 local->ops->stop(local_to_hw(local));
342 if (res)
343 return res;
344
345 ieee80211_if_config(dev);
346 ieee80211_reset_erp_info(dev);
347 ieee80211_enable_keys(sdata);
348
349 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
350 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
351 netif_carrier_off(dev);
352 else
353 netif_carrier_on(dev);
354 }
355
356 if (local->open_count == 0) {
357 res = dev_open(local->mdev);
358 WARN_ON(res);
359 tasklet_enable(&local->tx_pending_tasklet);
360 tasklet_enable(&local->tasklet);
361 }
362
363 /*
364 * set_multicast_list will be invoked by the networking core
365 * which will check whether any increments here were done in
366 * error and sync them down to the hardware as filter flags.
367 */
368 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
369 atomic_inc(&local->iff_allmultis);
370
371 if (sdata->flags & IEEE80211_SDATA_PROMISC)
372 atomic_inc(&local->iff_promiscs);
373
374 local->open_count++;
375 if (need_hw_reconfig)
376 ieee80211_hw_config(local);
377
378 /*
379 * ieee80211_sta_work is disabled while network interface
380 * is down. Therefore, some configuration changes may not
381 * yet be effective. Trigger execution of ieee80211_sta_work
382 * to fix this.
383 */
384 if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
385 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
386 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
387 queue_work(local->hw.workqueue, &ifsta->work);
388 }
389
390 netif_start_queue(dev);
391
392 return 0;
393 }
394
395 static int ieee80211_stop(struct net_device *dev)
396 {
397 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
398 struct ieee80211_local *local = sdata->local;
399 struct ieee80211_if_init_conf conf;
400 struct sta_info *sta;
401
402 /*
403 * Stop TX on this interface first.
404 */
405 netif_stop_queue(dev);
406
407 /*
408 * Now delete all active aggregation sessions.
409 */
410 rcu_read_lock();
411
412 list_for_each_entry_rcu(sta, &local->sta_list, list) {
413 if (sta->sdata == sdata)
414 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
415 }
416
417 rcu_read_unlock();
418
419 /*
420 * Remove all stations associated with this interface.
421 *
422 * This must be done before calling ops->remove_interface()
423 * because otherwise we can later invoke ops->sta_notify()
424 * whenever the STAs are removed, and that invalidates driver
425 * assumptions about always getting a vif pointer that is valid
426 * (because if we remove a STA after ops->remove_interface()
427 * the driver will have removed the vif info already!)
428 *
429 * We could relax this and only unlink the stations from the
430 * hash table and list but keep them on a per-sdata list that
431 * will be inserted back again when the interface is brought
432 * up again, but I don't currently see a use case for that,
433 * except with WDS which gets a STA entry created when it is
434 * brought up.
435 */
436 sta_info_flush(local, sdata);
437
438 /*
439 * Don't count this interface for promisc/allmulti while it
440 * is down. dev_mc_unsync() will invoke set_multicast_list
441 * on the master interface which will sync these down to the
442 * hardware as filter flags.
443 */
444 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
445 atomic_dec(&local->iff_allmultis);
446
447 if (sdata->flags & IEEE80211_SDATA_PROMISC)
448 atomic_dec(&local->iff_promiscs);
449
450 dev_mc_unsync(local->mdev, dev);
451
452 /* APs need special treatment */
453 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
454 struct ieee80211_sub_if_data *vlan, *tmp;
455 struct beacon_data *old_beacon = sdata->u.ap.beacon;
456
457 /* remove beacon */
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
459 synchronize_rcu();
460 kfree(old_beacon);
461
462 /* down all dependent devices, that is VLANs */
463 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
464 u.vlan.list)
465 dev_close(vlan->dev);
466 WARN_ON(!list_empty(&sdata->u.ap.vlans));
467 }
468
469 local->open_count--;
470
471 switch (sdata->vif.type) {
472 case IEEE80211_IF_TYPE_VLAN:
473 list_del(&sdata->u.vlan.list);
474 sdata->u.vlan.ap = NULL;
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_tx_lock_bh(local->mdev);
497 ieee80211_configure_filter(local);
498 netif_tx_unlock_bh(local->mdev);
499 break;
500 case IEEE80211_IF_TYPE_MESH_POINT:
501 case IEEE80211_IF_TYPE_STA:
502 case IEEE80211_IF_TYPE_IBSS:
503 sdata->u.sta.state = IEEE80211_DISABLED;
504 del_timer_sync(&sdata->u.sta.timer);
505 /*
506 * When we get here, the interface is marked down.
507 * Call synchronize_rcu() to wait for the RX path
508 * should it be using the interface and enqueuing
509 * frames at this very time on another CPU.
510 */
511 synchronize_rcu();
512 skb_queue_purge(&sdata->u.sta.skb_queue);
513
514 if (local->scan_dev == sdata->dev) {
515 if (!local->ops->hw_scan) {
516 local->sta_sw_scanning = 0;
517 cancel_delayed_work(&local->scan_work);
518 } else
519 local->sta_hw_scanning = 0;
520 }
521
522 flush_workqueue(local->hw.workqueue);
523
524 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
525 kfree(sdata->u.sta.extra_ie);
526 sdata->u.sta.extra_ie = NULL;
527 sdata->u.sta.extra_ie_len = 0;
528 /* fall through */
529 default:
530 conf.vif = &sdata->vif;
531 conf.type = sdata->vif.type;
532 conf.mac_addr = dev->dev_addr;
533 /* disable all keys for as long as this netdev is down */
534 ieee80211_disable_keys(sdata);
535 local->ops->remove_interface(local_to_hw(local), &conf);
536 }
537
538 if (local->open_count == 0) {
539 if (netif_running(local->mdev))
540 dev_close(local->mdev);
541
542 if (local->ops->stop)
543 local->ops->stop(local_to_hw(local));
544
545 ieee80211_led_radio(local, 0);
546
547 tasklet_disable(&local->tx_pending_tasklet);
548 tasklet_disable(&local->tasklet);
549 }
550
551 return 0;
552 }
553
554 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
555 {
556 struct ieee80211_local *local = hw_to_local(hw);
557 struct sta_info *sta;
558 struct ieee80211_sub_if_data *sdata;
559 u16 start_seq_num = 0;
560 u8 *state;
561 int ret;
562 DECLARE_MAC_BUF(mac);
563
564 if (tid >= STA_TID_NUM)
565 return -EINVAL;
566
567 #ifdef CONFIG_MAC80211_HT_DEBUG
568 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
569 print_mac(mac, ra), tid);
570 #endif /* CONFIG_MAC80211_HT_DEBUG */
571
572 rcu_read_lock();
573
574 sta = sta_info_get(local, ra);
575 if (!sta) {
576 printk(KERN_DEBUG "Could not find the station\n");
577 rcu_read_unlock();
578 return -ENOENT;
579 }
580
581 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
582
583 /* we have tried too many times, receiver does not want A-MPDU */
584 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
585 ret = -EBUSY;
586 goto start_ba_exit;
587 }
588
589 state = &sta->ampdu_mlme.tid_state_tx[tid];
590 /* check if the TID is not in aggregation flow already */
591 if (*state != HT_AGG_STATE_IDLE) {
592 #ifdef CONFIG_MAC80211_HT_DEBUG
593 printk(KERN_DEBUG "BA request denied - session is not "
594 "idle on tid %u\n", tid);
595 #endif /* CONFIG_MAC80211_HT_DEBUG */
596 ret = -EAGAIN;
597 goto start_ba_exit;
598 }
599
600 /* prepare A-MPDU MLME for Tx aggregation */
601 sta->ampdu_mlme.tid_tx[tid] =
602 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
603 if (!sta->ampdu_mlme.tid_tx[tid]) {
604 if (net_ratelimit())
605 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
606 tid);
607 ret = -ENOMEM;
608 goto start_ba_exit;
609 }
610 /* Tx timer */
611 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
612 sta_addba_resp_timer_expired;
613 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
614 (unsigned long)&sta->timer_to_tid[tid];
615 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
616
617 /* ensure that TX flow won't interrupt us
618 * until the end of the call to requeue function */
619 spin_lock_bh(&local->mdev->queue_lock);
620
621 /* create a new queue for this aggregation */
622 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
623
624 /* case no queue is available to aggregation
625 * don't switch to aggregation */
626 if (ret) {
627 #ifdef CONFIG_MAC80211_HT_DEBUG
628 printk(KERN_DEBUG "BA request denied - queue unavailable for"
629 " tid %d\n", tid);
630 #endif /* CONFIG_MAC80211_HT_DEBUG */
631 goto start_ba_err;
632 }
633 sdata = sta->sdata;
634
635 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
636 * call back right away, it must see that the flow has begun */
637 *state |= HT_ADDBA_REQUESTED_MSK;
638
639 if (local->ops->ampdu_action)
640 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
641 ra, tid, &start_seq_num);
642
643 if (ret) {
644 /* No need to requeue the packets in the agg queue, since we
645 * held the tx lock: no packet could be enqueued to the newly
646 * allocated queue */
647 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
648 #ifdef CONFIG_MAC80211_HT_DEBUG
649 printk(KERN_DEBUG "BA request denied - HW unavailable for"
650 " tid %d\n", tid);
651 #endif /* CONFIG_MAC80211_HT_DEBUG */
652 *state = HT_AGG_STATE_IDLE;
653 goto start_ba_err;
654 }
655
656 /* Will put all the packets in the new SW queue */
657 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
658 spin_unlock_bh(&local->mdev->queue_lock);
659
660 /* send an addBA request */
661 sta->ampdu_mlme.dialog_token_allocator++;
662 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
663 sta->ampdu_mlme.dialog_token_allocator;
664 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
665
666 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
667 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
668 sta->ampdu_mlme.tid_tx[tid]->ssn,
669 0x40, 5000);
670
671 /* activate the timer for the recipient's addBA response */
672 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
673 jiffies + ADDBA_RESP_INTERVAL;
674 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
675 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
676 goto start_ba_exit;
677
678 start_ba_err:
679 kfree(sta->ampdu_mlme.tid_tx[tid]);
680 sta->ampdu_mlme.tid_tx[tid] = NULL;
681 spin_unlock_bh(&local->mdev->queue_lock);
682 ret = -EBUSY;
683 start_ba_exit:
684 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
685 rcu_read_unlock();
686 return ret;
687 }
688 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
689
690 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
691 u8 *ra, u16 tid,
692 enum ieee80211_back_parties initiator)
693 {
694 struct ieee80211_local *local = hw_to_local(hw);
695 struct sta_info *sta;
696 u8 *state;
697 int ret = 0;
698 DECLARE_MAC_BUF(mac);
699
700 if (tid >= STA_TID_NUM)
701 return -EINVAL;
702
703 #ifdef CONFIG_MAC80211_HT_DEBUG
704 printk(KERN_DEBUG "Stop a BA session requested for %s tid %u\n",
705 print_mac(mac, ra), tid);
706 #endif /* CONFIG_MAC80211_HT_DEBUG */
707
708 rcu_read_lock();
709 sta = sta_info_get(local, ra);
710 if (!sta) {
711 rcu_read_unlock();
712 return -ENOENT;
713 }
714
715 /* check if the TID is in aggregation */
716 state = &sta->ampdu_mlme.tid_state_tx[tid];
717 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
718
719 if (*state != HT_AGG_STATE_OPERATIONAL) {
720 #ifdef CONFIG_MAC80211_HT_DEBUG
721 printk(KERN_DEBUG "Try to stop Tx aggregation on"
722 " non active TID\n");
723 #endif /* CONFIG_MAC80211_HT_DEBUG */
724 ret = -ENOENT;
725 goto stop_BA_exit;
726 }
727
728 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
729
730 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
731 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
732
733 if (local->ops->ampdu_action)
734 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
735 ra, tid, NULL);
736
737 /* case HW denied going back to legacy */
738 if (ret) {
739 WARN_ON(ret != -EBUSY);
740 *state = HT_AGG_STATE_OPERATIONAL;
741 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
742 goto stop_BA_exit;
743 }
744
745 stop_BA_exit:
746 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
747 rcu_read_unlock();
748 return ret;
749 }
750 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
751
752 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
753 {
754 struct ieee80211_local *local = hw_to_local(hw);
755 struct sta_info *sta;
756 u8 *state;
757 DECLARE_MAC_BUF(mac);
758
759 if (tid >= STA_TID_NUM) {
760 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
761 tid, STA_TID_NUM);
762 return;
763 }
764
765 rcu_read_lock();
766 sta = sta_info_get(local, ra);
767 if (!sta) {
768 rcu_read_unlock();
769 printk(KERN_DEBUG "Could not find station: %s\n",
770 print_mac(mac, ra));
771 return;
772 }
773
774 state = &sta->ampdu_mlme.tid_state_tx[tid];
775 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
776
777 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
778 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
779 *state);
780 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
781 rcu_read_unlock();
782 return;
783 }
784
785 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
786
787 *state |= HT_ADDBA_DRV_READY_MSK;
788
789 if (*state == HT_AGG_STATE_OPERATIONAL) {
790 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
791 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
792 }
793 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
794 rcu_read_unlock();
795 }
796 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
797
798 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
799 {
800 struct ieee80211_local *local = hw_to_local(hw);
801 struct sta_info *sta;
802 u8 *state;
803 int agg_queue;
804 DECLARE_MAC_BUF(mac);
805
806 if (tid >= STA_TID_NUM) {
807 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
808 tid, STA_TID_NUM);
809 return;
810 }
811
812 printk(KERN_DEBUG "Stop a BA session requested on DA %s tid %d\n",
813 print_mac(mac, ra), tid);
814
815 rcu_read_lock();
816 sta = sta_info_get(local, ra);
817 if (!sta) {
818 printk(KERN_DEBUG "Could not find station: %s\n",
819 print_mac(mac, ra));
820 rcu_read_unlock();
821 return;
822 }
823 state = &sta->ampdu_mlme.tid_state_tx[tid];
824
825 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
826 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
827 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
828 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
829 rcu_read_unlock();
830 return;
831 }
832
833 if (*state & HT_AGG_STATE_INITIATOR_MSK)
834 ieee80211_send_delba(sta->sdata->dev, ra, tid,
835 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
836
837 agg_queue = sta->tid_to_tx_q[tid];
838
839 /* avoid ordering issues: we are the only one that can modify
840 * the content of the qdiscs */
841 spin_lock_bh(&local->mdev->queue_lock);
842 /* remove the queue for this aggregation */
843 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
844 spin_unlock_bh(&local->mdev->queue_lock);
845
846 /* we just requeued the all the frames that were in the removed
847 * queue, and since we might miss a softirq we do netif_schedule.
848 * ieee80211_wake_queue is not used here as this queue is not
849 * necessarily stopped */
850 netif_schedule(local->mdev);
851 *state = HT_AGG_STATE_IDLE;
852 sta->ampdu_mlme.addba_req_num[tid] = 0;
853 kfree(sta->ampdu_mlme.tid_tx[tid]);
854 sta->ampdu_mlme.tid_tx[tid] = NULL;
855 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
856
857 rcu_read_unlock();
858 }
859 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
860
861 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
862 const u8 *ra, u16 tid)
863 {
864 struct ieee80211_local *local = hw_to_local(hw);
865 struct ieee80211_ra_tid *ra_tid;
866 struct sk_buff *skb = dev_alloc_skb(0);
867
868 if (unlikely(!skb)) {
869 if (net_ratelimit())
870 printk(KERN_WARNING "%s: Not enough memory, "
871 "dropping start BA session", skb->dev->name);
872 return;
873 }
874 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
875 memcpy(&ra_tid->ra, ra, ETH_ALEN);
876 ra_tid->tid = tid;
877
878 skb->pkt_type = IEEE80211_ADDBA_MSG;
879 skb_queue_tail(&local->skb_queue, skb);
880 tasklet_schedule(&local->tasklet);
881 }
882 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
883
884 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
885 const u8 *ra, u16 tid)
886 {
887 struct ieee80211_local *local = hw_to_local(hw);
888 struct ieee80211_ra_tid *ra_tid;
889 struct sk_buff *skb = dev_alloc_skb(0);
890
891 if (unlikely(!skb)) {
892 if (net_ratelimit())
893 printk(KERN_WARNING "%s: Not enough memory, "
894 "dropping stop BA session", skb->dev->name);
895 return;
896 }
897 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
898 memcpy(&ra_tid->ra, ra, ETH_ALEN);
899 ra_tid->tid = tid;
900
901 skb->pkt_type = IEEE80211_DELBA_MSG;
902 skb_queue_tail(&local->skb_queue, skb);
903 tasklet_schedule(&local->tasklet);
904 }
905 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
906
907 static void ieee80211_set_multicast_list(struct net_device *dev)
908 {
909 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
910 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
911 int allmulti, promisc, sdata_allmulti, sdata_promisc;
912
913 allmulti = !!(dev->flags & IFF_ALLMULTI);
914 promisc = !!(dev->flags & IFF_PROMISC);
915 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
916 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
917
918 if (allmulti != sdata_allmulti) {
919 if (dev->flags & IFF_ALLMULTI)
920 atomic_inc(&local->iff_allmultis);
921 else
922 atomic_dec(&local->iff_allmultis);
923 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
924 }
925
926 if (promisc != sdata_promisc) {
927 if (dev->flags & IFF_PROMISC)
928 atomic_inc(&local->iff_promiscs);
929 else
930 atomic_dec(&local->iff_promiscs);
931 sdata->flags ^= IEEE80211_SDATA_PROMISC;
932 }
933
934 dev_mc_sync(local->mdev, dev);
935 }
936
937 static const struct header_ops ieee80211_header_ops = {
938 .create = eth_header,
939 .parse = header_parse_80211,
940 .rebuild = eth_rebuild_header,
941 .cache = eth_header_cache,
942 .cache_update = eth_header_cache_update,
943 };
944
945 /* Must not be called for mdev */
946 void ieee80211_if_setup(struct net_device *dev)
947 {
948 ether_setup(dev);
949 dev->hard_start_xmit = ieee80211_subif_start_xmit;
950 dev->wireless_handlers = &ieee80211_iw_handler_def;
951 dev->set_multicast_list = ieee80211_set_multicast_list;
952 dev->change_mtu = ieee80211_change_mtu;
953 dev->open = ieee80211_open;
954 dev->stop = ieee80211_stop;
955 dev->destructor = ieee80211_if_free;
956 }
957
958 /* everything else */
959
960 static int __ieee80211_if_config(struct net_device *dev,
961 struct sk_buff *beacon,
962 struct ieee80211_tx_control *control)
963 {
964 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
965 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
966 struct ieee80211_if_conf conf;
967
968 if (!local->ops->config_interface || !netif_running(dev))
969 return 0;
970
971 memset(&conf, 0, sizeof(conf));
972 conf.type = sdata->vif.type;
973 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
974 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
975 conf.bssid = sdata->u.sta.bssid;
976 conf.ssid = sdata->u.sta.ssid;
977 conf.ssid_len = sdata->u.sta.ssid_len;
978 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
979 conf.beacon = beacon;
980 ieee80211_start_mesh(dev);
981 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
982 conf.ssid = sdata->u.ap.ssid;
983 conf.ssid_len = sdata->u.ap.ssid_len;
984 conf.beacon = beacon;
985 conf.beacon_control = control;
986 }
987 return local->ops->config_interface(local_to_hw(local),
988 &sdata->vif, &conf);
989 }
990
991 int ieee80211_if_config(struct net_device *dev)
992 {
993 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
995 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
996 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
997 return ieee80211_if_config_beacon(dev);
998 return __ieee80211_if_config(dev, NULL, NULL);
999 }
1000
1001 int ieee80211_if_config_beacon(struct net_device *dev)
1002 {
1003 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1004 struct ieee80211_tx_control control;
1005 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1006 struct sk_buff *skb;
1007
1008 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1009 return 0;
1010 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
1011 &control);
1012 if (!skb)
1013 return -ENOMEM;
1014 return __ieee80211_if_config(dev, skb, &control);
1015 }
1016
1017 int ieee80211_hw_config(struct ieee80211_local *local)
1018 {
1019 struct ieee80211_channel *chan;
1020 int ret = 0;
1021
1022 if (local->sta_sw_scanning)
1023 chan = local->scan_channel;
1024 else
1025 chan = local->oper_channel;
1026
1027 local->hw.conf.channel = chan;
1028
1029 if (!local->hw.conf.power_level)
1030 local->hw.conf.power_level = chan->max_power;
1031 else
1032 local->hw.conf.power_level = min(chan->max_power,
1033 local->hw.conf.power_level);
1034
1035 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1036
1037 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1038 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1039 wiphy_name(local->hw.wiphy), chan->center_freq);
1040 #endif
1041
1042 if (local->open_count)
1043 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1044
1045 return ret;
1046 }
1047
1048 /**
1049 * ieee80211_hw_config_ht should be used only after legacy configuration
1050 * has been determined, as ht configuration depends upon the hardware's
1051 * HT abilities for a _specific_ band.
1052 */
1053 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
1054 struct ieee80211_ht_info *req_ht_cap,
1055 struct ieee80211_ht_bss_info *req_bss_cap)
1056 {
1057 struct ieee80211_conf *conf = &local->hw.conf;
1058 struct ieee80211_supported_band *sband;
1059 int i;
1060
1061 sband = local->hw.wiphy->bands[conf->channel->band];
1062
1063 /* HT is not supported */
1064 if (!sband->ht_info.ht_supported) {
1065 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1066 return -EOPNOTSUPP;
1067 }
1068
1069 /* disable HT */
1070 if (!enable_ht) {
1071 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1072 } else {
1073 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1074 conf->ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1075 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1076 conf->ht_conf.cap |=
1077 sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1078 conf->ht_bss_conf.primary_channel =
1079 req_bss_cap->primary_channel;
1080 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1081 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1082 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1083 conf->ht_conf.supp_mcs_set[i] =
1084 sband->ht_info.supp_mcs_set[i] &
1085 req_ht_cap->supp_mcs_set[i];
1086
1087 /* In STA mode, this gives us indication
1088 * to the AP's mode of operation */
1089 conf->ht_conf.ht_supported = 1;
1090 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1091 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1092 }
1093
1094 local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
1095
1096 return 0;
1097 }
1098
1099 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1100 u32 changed)
1101 {
1102 struct ieee80211_local *local = sdata->local;
1103
1104 if (!changed)
1105 return;
1106
1107 if (local->ops->bss_info_changed)
1108 local->ops->bss_info_changed(local_to_hw(local),
1109 &sdata->vif,
1110 &sdata->bss_conf,
1111 changed);
1112 }
1113
1114 void ieee80211_reset_erp_info(struct net_device *dev)
1115 {
1116 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1117
1118 sdata->bss_conf.use_cts_prot = 0;
1119 sdata->bss_conf.use_short_preamble = 0;
1120 ieee80211_bss_info_change_notify(sdata,
1121 BSS_CHANGED_ERP_CTS_PROT |
1122 BSS_CHANGED_ERP_PREAMBLE);
1123 }
1124
1125 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1126 struct sk_buff *skb,
1127 struct ieee80211_tx_status *status)
1128 {
1129 struct ieee80211_local *local = hw_to_local(hw);
1130 struct ieee80211_tx_status *saved;
1131 int tmp;
1132
1133 skb->dev = local->mdev;
1134 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1135 if (unlikely(!saved)) {
1136 if (net_ratelimit())
1137 printk(KERN_WARNING "%s: Not enough memory, "
1138 "dropping tx status", skb->dev->name);
1139 /* should be dev_kfree_skb_irq, but due to this function being
1140 * named _irqsafe instead of just _irq we can't be sure that
1141 * people won't call it from non-irq contexts */
1142 dev_kfree_skb_any(skb);
1143 return;
1144 }
1145 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1146 /* copy pointer to saved status into skb->cb for use by tasklet */
1147 memcpy(skb->cb, &saved, sizeof(saved));
1148
1149 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1150 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1151 &local->skb_queue : &local->skb_queue_unreliable, skb);
1152 tmp = skb_queue_len(&local->skb_queue) +
1153 skb_queue_len(&local->skb_queue_unreliable);
1154 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1155 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1156 memcpy(&saved, skb->cb, sizeof(saved));
1157 kfree(saved);
1158 dev_kfree_skb_irq(skb);
1159 tmp--;
1160 I802_DEBUG_INC(local->tx_status_drop);
1161 }
1162 tasklet_schedule(&local->tasklet);
1163 }
1164 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1165
1166 static void ieee80211_tasklet_handler(unsigned long data)
1167 {
1168 struct ieee80211_local *local = (struct ieee80211_local *) data;
1169 struct sk_buff *skb;
1170 struct ieee80211_rx_status rx_status;
1171 struct ieee80211_tx_status *tx_status;
1172 struct ieee80211_ra_tid *ra_tid;
1173
1174 while ((skb = skb_dequeue(&local->skb_queue)) ||
1175 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1176 switch (skb->pkt_type) {
1177 case IEEE80211_RX_MSG:
1178 /* status is in skb->cb */
1179 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1180 /* Clear skb->pkt_type in order to not confuse kernel
1181 * netstack. */
1182 skb->pkt_type = 0;
1183 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1184 break;
1185 case IEEE80211_TX_STATUS_MSG:
1186 /* get pointer to saved status out of skb->cb */
1187 memcpy(&tx_status, skb->cb, sizeof(tx_status));
1188 skb->pkt_type = 0;
1189 ieee80211_tx_status(local_to_hw(local),
1190 skb, tx_status);
1191 kfree(tx_status);
1192 break;
1193 case IEEE80211_DELBA_MSG:
1194 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1195 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1196 ra_tid->ra, ra_tid->tid);
1197 dev_kfree_skb(skb);
1198 break;
1199 case IEEE80211_ADDBA_MSG:
1200 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1201 ieee80211_start_tx_ba_cb(local_to_hw(local),
1202 ra_tid->ra, ra_tid->tid);
1203 dev_kfree_skb(skb);
1204 break ;
1205 default: /* should never get here! */
1206 printk(KERN_ERR "%s: Unknown message type (%d)\n",
1207 wiphy_name(local->hw.wiphy), skb->pkt_type);
1208 dev_kfree_skb(skb);
1209 break;
1210 }
1211 }
1212 }
1213
1214 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1215 * make a prepared TX frame (one that has been given to hw) to look like brand
1216 * new IEEE 802.11 frame that is ready to go through TX processing again.
1217 * Also, tx_packet_data in cb is restored from tx_control. */
1218 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1219 struct ieee80211_key *key,
1220 struct sk_buff *skb,
1221 struct ieee80211_tx_control *control)
1222 {
1223 int hdrlen, iv_len, mic_len;
1224 struct ieee80211_tx_packet_data *pkt_data;
1225
1226 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1227 pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
1228 pkt_data->flags = 0;
1229 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1230 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1231 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1232 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1233 if (control->flags & IEEE80211_TXCTL_REQUEUE)
1234 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
1235 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1236 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
1237 pkt_data->queue = control->queue;
1238
1239 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1240
1241 if (!key)
1242 goto no_key;
1243
1244 switch (key->conf.alg) {
1245 case ALG_WEP:
1246 iv_len = WEP_IV_LEN;
1247 mic_len = WEP_ICV_LEN;
1248 break;
1249 case ALG_TKIP:
1250 iv_len = TKIP_IV_LEN;
1251 mic_len = TKIP_ICV_LEN;
1252 break;
1253 case ALG_CCMP:
1254 iv_len = CCMP_HDR_LEN;
1255 mic_len = CCMP_MIC_LEN;
1256 break;
1257 default:
1258 goto no_key;
1259 }
1260
1261 if (skb->len >= mic_len &&
1262 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1263 skb_trim(skb, skb->len - mic_len);
1264 if (skb->len >= iv_len && skb->len > hdrlen) {
1265 memmove(skb->data + iv_len, skb->data, hdrlen);
1266 skb_pull(skb, iv_len);
1267 }
1268
1269 no_key:
1270 {
1271 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1272 u16 fc = le16_to_cpu(hdr->frame_control);
1273 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1274 fc &= ~IEEE80211_STYPE_QOS_DATA;
1275 hdr->frame_control = cpu_to_le16(fc);
1276 memmove(skb->data + 2, skb->data, hdrlen - 2);
1277 skb_pull(skb, 2);
1278 }
1279 }
1280 }
1281
1282 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1283 struct sta_info *sta,
1284 struct sk_buff *skb,
1285 struct ieee80211_tx_status *status)
1286 {
1287 sta->tx_filtered_count++;
1288
1289 /*
1290 * Clear the TX filter mask for this STA when sending the next
1291 * packet. If the STA went to power save mode, this will happen
1292 * happen when it wakes up for the next time.
1293 */
1294 sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1295
1296 /*
1297 * This code races in the following way:
1298 *
1299 * (1) STA sends frame indicating it will go to sleep and does so
1300 * (2) hardware/firmware adds STA to filter list, passes frame up
1301 * (3) hardware/firmware processes TX fifo and suppresses a frame
1302 * (4) we get TX status before having processed the frame and
1303 * knowing that the STA has gone to sleep.
1304 *
1305 * This is actually quite unlikely even when both those events are
1306 * processed from interrupts coming in quickly after one another or
1307 * even at the same time because we queue both TX status events and
1308 * RX frames to be processed by a tasklet and process them in the
1309 * same order that they were received or TX status last. Hence, there
1310 * is no race as long as the frame RX is processed before the next TX
1311 * status, which drivers can ensure, see below.
1312 *
1313 * Note that this can only happen if the hardware or firmware can
1314 * actually add STAs to the filter list, if this is done by the
1315 * driver in response to set_tim() (which will only reduce the race
1316 * this whole filtering tries to solve, not completely solve it)
1317 * this situation cannot happen.
1318 *
1319 * To completely solve this race drivers need to make sure that they
1320 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1321 * functions and
1322 * (b) always process RX events before TX status events if ordering
1323 * can be unknown, for example with different interrupt status
1324 * bits.
1325 */
1326 if (sta->flags & WLAN_STA_PS &&
1327 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1328 ieee80211_remove_tx_extra(local, sta->key, skb,
1329 &status->control);
1330 skb_queue_tail(&sta->tx_filtered, skb);
1331 return;
1332 }
1333
1334 if (!(sta->flags & WLAN_STA_PS) &&
1335 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1336 /* Software retry the packet once */
1337 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1338 ieee80211_remove_tx_extra(local, sta->key, skb,
1339 &status->control);
1340 dev_queue_xmit(skb);
1341 return;
1342 }
1343
1344 if (net_ratelimit())
1345 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1346 "queue_len=%d PS=%d @%lu\n",
1347 wiphy_name(local->hw.wiphy),
1348 skb_queue_len(&sta->tx_filtered),
1349 !!(sta->flags & WLAN_STA_PS), jiffies);
1350 dev_kfree_skb(skb);
1351 }
1352
1353 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1354 struct ieee80211_tx_status *status)
1355 {
1356 struct sk_buff *skb2;
1357 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1358 struct ieee80211_local *local = hw_to_local(hw);
1359 u16 frag, type;
1360 struct ieee80211_tx_status_rtap_hdr *rthdr;
1361 struct ieee80211_sub_if_data *sdata;
1362 struct net_device *prev_dev = NULL;
1363
1364 if (!status) {
1365 printk(KERN_ERR
1366 "%s: ieee80211_tx_status called with NULL status\n",
1367 wiphy_name(local->hw.wiphy));
1368 dev_kfree_skb(skb);
1369 return;
1370 }
1371
1372 rcu_read_lock();
1373
1374 if (status->excessive_retries) {
1375 struct sta_info *sta;
1376 sta = sta_info_get(local, hdr->addr1);
1377 if (sta) {
1378 if (sta->flags & WLAN_STA_PS) {
1379 /*
1380 * The STA is in power save mode, so assume
1381 * that this TX packet failed because of that.
1382 */
1383 status->excessive_retries = 0;
1384 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1385 ieee80211_handle_filtered_frame(local, sta,
1386 skb, status);
1387 rcu_read_unlock();
1388 return;
1389 }
1390 }
1391 }
1392
1393 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1394 struct sta_info *sta;
1395 sta = sta_info_get(local, hdr->addr1);
1396 if (sta) {
1397 ieee80211_handle_filtered_frame(local, sta, skb,
1398 status);
1399 rcu_read_unlock();
1400 return;
1401 }
1402 } else
1403 rate_control_tx_status(local->mdev, skb, status);
1404
1405 rcu_read_unlock();
1406
1407 ieee80211_led_tx(local, 0);
1408
1409 /* SNMP counters
1410 * Fragments are passed to low-level drivers as separate skbs, so these
1411 * are actually fragments, not frames. Update frame counters only for
1412 * the first fragment of the frame. */
1413
1414 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1415 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1416
1417 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1418 if (frag == 0) {
1419 local->dot11TransmittedFrameCount++;
1420 if (is_multicast_ether_addr(hdr->addr1))
1421 local->dot11MulticastTransmittedFrameCount++;
1422 if (status->retry_count > 0)
1423 local->dot11RetryCount++;
1424 if (status->retry_count > 1)
1425 local->dot11MultipleRetryCount++;
1426 }
1427
1428 /* This counter shall be incremented for an acknowledged MPDU
1429 * with an individual address in the address 1 field or an MPDU
1430 * with a multicast address in the address 1 field of type Data
1431 * or Management. */
1432 if (!is_multicast_ether_addr(hdr->addr1) ||
1433 type == IEEE80211_FTYPE_DATA ||
1434 type == IEEE80211_FTYPE_MGMT)
1435 local->dot11TransmittedFragmentCount++;
1436 } else {
1437 if (frag == 0)
1438 local->dot11FailedCount++;
1439 }
1440
1441 /* this was a transmitted frame, but now we want to reuse it */
1442 skb_orphan(skb);
1443
1444 /*
1445 * This is a bit racy but we can avoid a lot of work
1446 * with this test...
1447 */
1448 if (!local->monitors && !local->cooked_mntrs) {
1449 dev_kfree_skb(skb);
1450 return;
1451 }
1452
1453 /* send frame to monitor interfaces now */
1454
1455 if (skb_headroom(skb) < sizeof(*rthdr)) {
1456 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1457 dev_kfree_skb(skb);
1458 return;
1459 }
1460
1461 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1462 skb_push(skb, sizeof(*rthdr));
1463
1464 memset(rthdr, 0, sizeof(*rthdr));
1465 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1466 rthdr->hdr.it_present =
1467 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1468 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1469
1470 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1471 !is_multicast_ether_addr(hdr->addr1))
1472 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1473
1474 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1475 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1476 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1477 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1478 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1479
1480 rthdr->data_retries = status->retry_count;
1481
1482 /* XXX: is this sufficient for BPF? */
1483 skb_set_mac_header(skb, 0);
1484 skb->ip_summed = CHECKSUM_UNNECESSARY;
1485 skb->pkt_type = PACKET_OTHERHOST;
1486 skb->protocol = htons(ETH_P_802_2);
1487 memset(skb->cb, 0, sizeof(skb->cb));
1488
1489 rcu_read_lock();
1490 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1491 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1492 if (!netif_running(sdata->dev))
1493 continue;
1494
1495 if (prev_dev) {
1496 skb2 = skb_clone(skb, GFP_ATOMIC);
1497 if (skb2) {
1498 skb2->dev = prev_dev;
1499 netif_rx(skb2);
1500 }
1501 }
1502
1503 prev_dev = sdata->dev;
1504 }
1505 }
1506 if (prev_dev) {
1507 skb->dev = prev_dev;
1508 netif_rx(skb);
1509 skb = NULL;
1510 }
1511 rcu_read_unlock();
1512 dev_kfree_skb(skb);
1513 }
1514 EXPORT_SYMBOL(ieee80211_tx_status);
1515
1516 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1517 const struct ieee80211_ops *ops)
1518 {
1519 struct ieee80211_local *local;
1520 int priv_size;
1521 struct wiphy *wiphy;
1522
1523 /* Ensure 32-byte alignment of our private data and hw private data.
1524 * We use the wiphy priv data for both our ieee80211_local and for
1525 * the driver's private data
1526 *
1527 * In memory it'll be like this:
1528 *
1529 * +-------------------------+
1530 * | struct wiphy |
1531 * +-------------------------+
1532 * | struct ieee80211_local |
1533 * +-------------------------+
1534 * | driver's private data |
1535 * +-------------------------+
1536 *
1537 */
1538 priv_size = ((sizeof(struct ieee80211_local) +
1539 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1540 priv_data_len;
1541
1542 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1543
1544 if (!wiphy)
1545 return NULL;
1546
1547 wiphy->privid = mac80211_wiphy_privid;
1548
1549 local = wiphy_priv(wiphy);
1550 local->hw.wiphy = wiphy;
1551
1552 local->hw.priv = (char *)local +
1553 ((sizeof(struct ieee80211_local) +
1554 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1555
1556 BUG_ON(!ops->tx);
1557 BUG_ON(!ops->start);
1558 BUG_ON(!ops->stop);
1559 BUG_ON(!ops->config);
1560 BUG_ON(!ops->add_interface);
1561 BUG_ON(!ops->remove_interface);
1562 BUG_ON(!ops->configure_filter);
1563 local->ops = ops;
1564
1565 local->hw.queues = 1; /* default */
1566
1567 local->bridge_packets = 1;
1568
1569 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1570 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1571 local->short_retry_limit = 7;
1572 local->long_retry_limit = 4;
1573 local->hw.conf.radio_enabled = 1;
1574
1575 INIT_LIST_HEAD(&local->interfaces);
1576
1577 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1578
1579 sta_info_init(local);
1580
1581 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1582 (unsigned long)local);
1583 tasklet_disable(&local->tx_pending_tasklet);
1584
1585 tasklet_init(&local->tasklet,
1586 ieee80211_tasklet_handler,
1587 (unsigned long) local);
1588 tasklet_disable(&local->tasklet);
1589
1590 skb_queue_head_init(&local->skb_queue);
1591 skb_queue_head_init(&local->skb_queue_unreliable);
1592
1593 return local_to_hw(local);
1594 }
1595 EXPORT_SYMBOL(ieee80211_alloc_hw);
1596
1597 int ieee80211_register_hw(struct ieee80211_hw *hw)
1598 {
1599 struct ieee80211_local *local = hw_to_local(hw);
1600 const char *name;
1601 int result;
1602 enum ieee80211_band band;
1603 struct net_device *mdev;
1604 struct ieee80211_sub_if_data *sdata;
1605
1606 /*
1607 * generic code guarantees at least one band,
1608 * set this very early because much code assumes
1609 * that hw.conf.channel is assigned
1610 */
1611 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1612 struct ieee80211_supported_band *sband;
1613
1614 sband = local->hw.wiphy->bands[band];
1615 if (sband) {
1616 /* init channel we're on */
1617 local->hw.conf.channel =
1618 local->oper_channel =
1619 local->scan_channel = &sband->channels[0];
1620 break;
1621 }
1622 }
1623
1624 result = wiphy_register(local->hw.wiphy);
1625 if (result < 0)
1626 return result;
1627
1628 /* for now, mdev needs sub_if_data :/ */
1629 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1630 "wmaster%d", ether_setup);
1631 if (!mdev)
1632 goto fail_mdev_alloc;
1633
1634 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1635 mdev->ieee80211_ptr = &sdata->wdev;
1636 sdata->wdev.wiphy = local->hw.wiphy;
1637
1638 local->mdev = mdev;
1639
1640 ieee80211_rx_bss_list_init(mdev);
1641
1642 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1643 mdev->open = ieee80211_master_open;
1644 mdev->stop = ieee80211_master_stop;
1645 mdev->type = ARPHRD_IEEE80211;
1646 mdev->header_ops = &ieee80211_header_ops;
1647 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1648
1649 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1650 sdata->dev = mdev;
1651 sdata->local = local;
1652 sdata->u.ap.force_unicast_rateidx = -1;
1653 sdata->u.ap.max_ratectrl_rateidx = -1;
1654 ieee80211_if_sdata_init(sdata);
1655
1656 /* no RCU needed since we're still during init phase */
1657 list_add_tail(&sdata->list, &local->interfaces);
1658
1659 name = wiphy_dev(local->hw.wiphy)->driver->name;
1660 local->hw.workqueue = create_singlethread_workqueue(name);
1661 if (!local->hw.workqueue) {
1662 result = -ENOMEM;
1663 goto fail_workqueue;
1664 }
1665
1666 /*
1667 * The hardware needs headroom for sending the frame,
1668 * and we need some headroom for passing the frame to monitor
1669 * interfaces, but never both at the same time.
1670 */
1671 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1672 sizeof(struct ieee80211_tx_status_rtap_hdr));
1673
1674 debugfs_hw_add(local);
1675
1676 local->hw.conf.beacon_int = 1000;
1677
1678 local->wstats_flags |= local->hw.max_rssi ?
1679 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1680 local->wstats_flags |= local->hw.max_signal ?
1681 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1682 local->wstats_flags |= local->hw.max_noise ?
1683 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1684 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1685 local->wstats_flags |= IW_QUAL_DBM;
1686
1687 result = sta_info_start(local);
1688 if (result < 0)
1689 goto fail_sta_info;
1690
1691 rtnl_lock();
1692 result = dev_alloc_name(local->mdev, local->mdev->name);
1693 if (result < 0)
1694 goto fail_dev;
1695
1696 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1697 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1698
1699 result = register_netdevice(local->mdev);
1700 if (result < 0)
1701 goto fail_dev;
1702
1703 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1704 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1705
1706 result = ieee80211_init_rate_ctrl_alg(local,
1707 hw->rate_control_algorithm);
1708 if (result < 0) {
1709 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1710 "algorithm\n", wiphy_name(local->hw.wiphy));
1711 goto fail_rate;
1712 }
1713
1714 result = ieee80211_wep_init(local);
1715
1716 if (result < 0) {
1717 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1718 wiphy_name(local->hw.wiphy));
1719 goto fail_wep;
1720 }
1721
1722 ieee80211_install_qdisc(local->mdev);
1723
1724 /* add one default STA interface */
1725 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1726 IEEE80211_IF_TYPE_STA, NULL);
1727 if (result)
1728 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1729 wiphy_name(local->hw.wiphy));
1730
1731 local->reg_state = IEEE80211_DEV_REGISTERED;
1732 rtnl_unlock();
1733
1734 ieee80211_led_init(local);
1735
1736 return 0;
1737
1738 fail_wep:
1739 rate_control_deinitialize(local);
1740 fail_rate:
1741 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1742 unregister_netdevice(local->mdev);
1743 fail_dev:
1744 rtnl_unlock();
1745 sta_info_stop(local);
1746 fail_sta_info:
1747 debugfs_hw_del(local);
1748 destroy_workqueue(local->hw.workqueue);
1749 fail_workqueue:
1750 ieee80211_if_free(local->mdev);
1751 local->mdev = NULL;
1752 fail_mdev_alloc:
1753 wiphy_unregister(local->hw.wiphy);
1754 return result;
1755 }
1756 EXPORT_SYMBOL(ieee80211_register_hw);
1757
1758 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1759 {
1760 struct ieee80211_local *local = hw_to_local(hw);
1761 struct ieee80211_sub_if_data *sdata, *tmp;
1762
1763 tasklet_kill(&local->tx_pending_tasklet);
1764 tasklet_kill(&local->tasklet);
1765
1766 rtnl_lock();
1767
1768 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1769
1770 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1771
1772 /*
1773 * At this point, interface list manipulations are fine
1774 * because the driver cannot be handing us frames any
1775 * more and the tasklet is killed.
1776 */
1777
1778 /*
1779 * First, we remove all non-master interfaces. Do this because they
1780 * may have bss pointer dependency on the master, and when we free
1781 * the master these would be freed as well, breaking our list
1782 * iteration completely.
1783 */
1784 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1785 if (sdata->dev == local->mdev)
1786 continue;
1787 list_del(&sdata->list);
1788 __ieee80211_if_del(local, sdata);
1789 }
1790
1791 /* then, finally, remove the master interface */
1792 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1793
1794 rtnl_unlock();
1795
1796 ieee80211_rx_bss_list_deinit(local->mdev);
1797 ieee80211_clear_tx_pending(local);
1798 sta_info_stop(local);
1799 rate_control_deinitialize(local);
1800 debugfs_hw_del(local);
1801
1802 if (skb_queue_len(&local->skb_queue)
1803 || skb_queue_len(&local->skb_queue_unreliable))
1804 printk(KERN_WARNING "%s: skb_queue not empty\n",
1805 wiphy_name(local->hw.wiphy));
1806 skb_queue_purge(&local->skb_queue);
1807 skb_queue_purge(&local->skb_queue_unreliable);
1808
1809 destroy_workqueue(local->hw.workqueue);
1810 wiphy_unregister(local->hw.wiphy);
1811 ieee80211_wep_free(local);
1812 ieee80211_led_exit(local);
1813 ieee80211_if_free(local->mdev);
1814 local->mdev = NULL;
1815 }
1816 EXPORT_SYMBOL(ieee80211_unregister_hw);
1817
1818 void ieee80211_free_hw(struct ieee80211_hw *hw)
1819 {
1820 struct ieee80211_local *local = hw_to_local(hw);
1821
1822 wiphy_free(local->hw.wiphy);
1823 }
1824 EXPORT_SYMBOL(ieee80211_free_hw);
1825
1826 static int __init ieee80211_init(void)
1827 {
1828 struct sk_buff *skb;
1829 int ret;
1830
1831 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1832
1833 ret = rc80211_pid_init();
1834 if (ret)
1835 goto out;
1836
1837 ret = ieee80211_wme_register();
1838 if (ret) {
1839 printk(KERN_DEBUG "ieee80211_init: failed to "
1840 "initialize WME (err=%d)\n", ret);
1841 goto out_cleanup_pid;
1842 }
1843
1844 ieee80211_debugfs_netdev_init();
1845
1846 return 0;
1847
1848 out_cleanup_pid:
1849 rc80211_pid_exit();
1850 out:
1851 return ret;
1852 }
1853
1854 static void __exit ieee80211_exit(void)
1855 {
1856 rc80211_pid_exit();
1857
1858 if (mesh_allocated)
1859 ieee80211s_stop();
1860
1861 ieee80211_wme_unregister();
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");
kernel source for telekom puls (alcatel/mediatek)