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pat: cleanups
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / main.c
blobe9a978979d38553188163f1b632360233735a401
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 #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 rcu_read_lock();
704 sta = sta_info_get(local, ra);
705 if (!sta) {
706 rcu_read_unlock();
707 return -ENOENT;
708 }
709
710 /* check if the TID is in aggregation */
711 state = &sta->ampdu_mlme.tid_state_tx[tid];
712 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
713
714 if (*state != HT_AGG_STATE_OPERATIONAL) {
715 ret = -ENOENT;
716 goto stop_BA_exit;
717 }
718
719 #ifdef CONFIG_MAC80211_HT_DEBUG
720 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
721 print_mac(mac, ra), tid);
722 #endif /* CONFIG_MAC80211_HT_DEBUG */
723
724 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
725
726 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
727 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
728
729 if (local->ops->ampdu_action)
730 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
731 ra, tid, NULL);
732
733 /* case HW denied going back to legacy */
734 if (ret) {
735 WARN_ON(ret != -EBUSY);
736 *state = HT_AGG_STATE_OPERATIONAL;
737 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
738 goto stop_BA_exit;
739 }
740
741 stop_BA_exit:
742 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
743 rcu_read_unlock();
744 return ret;
745 }
746 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
747
748 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
749 {
750 struct ieee80211_local *local = hw_to_local(hw);
751 struct sta_info *sta;
752 u8 *state;
753 DECLARE_MAC_BUF(mac);
754
755 if (tid >= STA_TID_NUM) {
756 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
757 tid, STA_TID_NUM);
758 return;
759 }
760
761 rcu_read_lock();
762 sta = sta_info_get(local, ra);
763 if (!sta) {
764 rcu_read_unlock();
765 printk(KERN_DEBUG "Could not find station: %s\n",
766 print_mac(mac, ra));
767 return;
768 }
769
770 state = &sta->ampdu_mlme.tid_state_tx[tid];
771 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
772
773 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
774 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
775 *state);
776 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
777 rcu_read_unlock();
778 return;
779 }
780
781 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
782
783 *state |= HT_ADDBA_DRV_READY_MSK;
784
785 if (*state == HT_AGG_STATE_OPERATIONAL) {
786 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
787 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
788 }
789 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
790 rcu_read_unlock();
791 }
792 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
793
794 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
795 {
796 struct ieee80211_local *local = hw_to_local(hw);
797 struct sta_info *sta;
798 u8 *state;
799 int agg_queue;
800 DECLARE_MAC_BUF(mac);
801
802 if (tid >= STA_TID_NUM) {
803 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
804 tid, STA_TID_NUM);
805 return;
806 }
807
808 #ifdef CONFIG_MAC80211_HT_DEBUG
809 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
810 print_mac(mac, ra), tid);
811 #endif /* CONFIG_MAC80211_HT_DEBUG */
812
813 rcu_read_lock();
814 sta = sta_info_get(local, ra);
815 if (!sta) {
816 printk(KERN_DEBUG "Could not find station: %s\n",
817 print_mac(mac, ra));
818 rcu_read_unlock();
819 return;
820 }
821 state = &sta->ampdu_mlme.tid_state_tx[tid];
822
823 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
824 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
825 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
826 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
827 rcu_read_unlock();
828 return;
829 }
830
831 if (*state & HT_AGG_STATE_INITIATOR_MSK)
832 ieee80211_send_delba(sta->sdata->dev, ra, tid,
833 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
834
835 agg_queue = sta->tid_to_tx_q[tid];
836
837 /* avoid ordering issues: we are the only one that can modify
838 * the content of the qdiscs */
839 spin_lock_bh(&local->mdev->queue_lock);
840 /* remove the queue for this aggregation */
841 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
842 spin_unlock_bh(&local->mdev->queue_lock);
843
844 /* we just requeued the all the frames that were in the removed
845 * queue, and since we might miss a softirq we do netif_schedule.
846 * ieee80211_wake_queue is not used here as this queue is not
847 * necessarily stopped */
848 netif_schedule(local->mdev);
849 *state = HT_AGG_STATE_IDLE;
850 sta->ampdu_mlme.addba_req_num[tid] = 0;
851 kfree(sta->ampdu_mlme.tid_tx[tid]);
852 sta->ampdu_mlme.tid_tx[tid] = NULL;
853 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
854
855 rcu_read_unlock();
856 }
857 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
858
859 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
860 const u8 *ra, u16 tid)
861 {
862 struct ieee80211_local *local = hw_to_local(hw);
863 struct ieee80211_ra_tid *ra_tid;
864 struct sk_buff *skb = dev_alloc_skb(0);
865
866 if (unlikely(!skb)) {
867 if (net_ratelimit())
868 printk(KERN_WARNING "%s: Not enough memory, "
869 "dropping start BA session", skb->dev->name);
870 return;
871 }
872 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
873 memcpy(&ra_tid->ra, ra, ETH_ALEN);
874 ra_tid->tid = tid;
875
876 skb->pkt_type = IEEE80211_ADDBA_MSG;
877 skb_queue_tail(&local->skb_queue, skb);
878 tasklet_schedule(&local->tasklet);
879 }
880 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
881
882 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
883 const u8 *ra, u16 tid)
884 {
885 struct ieee80211_local *local = hw_to_local(hw);
886 struct ieee80211_ra_tid *ra_tid;
887 struct sk_buff *skb = dev_alloc_skb(0);
888
889 if (unlikely(!skb)) {
890 if (net_ratelimit())
891 printk(KERN_WARNING "%s: Not enough memory, "
892 "dropping stop BA session", skb->dev->name);
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_DELBA_MSG;
900 skb_queue_tail(&local->skb_queue, skb);
901 tasklet_schedule(&local->tasklet);
902 }
903 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
904
905 static void ieee80211_set_multicast_list(struct net_device *dev)
906 {
907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
908 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
909 int allmulti, promisc, sdata_allmulti, sdata_promisc;
910
911 allmulti = !!(dev->flags & IFF_ALLMULTI);
912 promisc = !!(dev->flags & IFF_PROMISC);
913 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
914 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
915
916 if (allmulti != sdata_allmulti) {
917 if (dev->flags & IFF_ALLMULTI)
918 atomic_inc(&local->iff_allmultis);
919 else
920 atomic_dec(&local->iff_allmultis);
921 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
922 }
923
924 if (promisc != sdata_promisc) {
925 if (dev->flags & IFF_PROMISC)
926 atomic_inc(&local->iff_promiscs);
927 else
928 atomic_dec(&local->iff_promiscs);
929 sdata->flags ^= IEEE80211_SDATA_PROMISC;
930 }
931
932 dev_mc_sync(local->mdev, dev);
933 }
934
935 static const struct header_ops ieee80211_header_ops = {
936 .create = eth_header,
937 .parse = header_parse_80211,
938 .rebuild = eth_rebuild_header,
939 .cache = eth_header_cache,
940 .cache_update = eth_header_cache_update,
941 };
942
943 /* Must not be called for mdev */
944 void ieee80211_if_setup(struct net_device *dev)
945 {
946 ether_setup(dev);
947 dev->hard_start_xmit = ieee80211_subif_start_xmit;
948 dev->wireless_handlers = &ieee80211_iw_handler_def;
949 dev->set_multicast_list = ieee80211_set_multicast_list;
950 dev->change_mtu = ieee80211_change_mtu;
951 dev->open = ieee80211_open;
952 dev->stop = ieee80211_stop;
953 dev->destructor = ieee80211_if_free;
954 }
955
956 /* everything else */
957
958 static int __ieee80211_if_config(struct net_device *dev,
959 struct sk_buff *beacon,
960 struct ieee80211_tx_control *control)
961 {
962 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
963 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
964 struct ieee80211_if_conf conf;
965
966 if (!local->ops->config_interface || !netif_running(dev))
967 return 0;
968
969 memset(&conf, 0, sizeof(conf));
970 conf.type = sdata->vif.type;
971 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
972 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
973 conf.bssid = sdata->u.sta.bssid;
974 conf.ssid = sdata->u.sta.ssid;
975 conf.ssid_len = sdata->u.sta.ssid_len;
976 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
977 conf.beacon = beacon;
978 ieee80211_start_mesh(dev);
979 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
980 conf.ssid = sdata->u.ap.ssid;
981 conf.ssid_len = sdata->u.ap.ssid_len;
982 conf.beacon = beacon;
983 conf.beacon_control = control;
984 }
985 return local->ops->config_interface(local_to_hw(local),
986 &sdata->vif, &conf);
987 }
988
989 int ieee80211_if_config(struct net_device *dev)
990 {
991 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
992 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
993 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
994 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
995 return ieee80211_if_config_beacon(dev);
996 return __ieee80211_if_config(dev, NULL, NULL);
997 }
998
999 int ieee80211_if_config_beacon(struct net_device *dev)
1000 {
1001 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1002 struct ieee80211_tx_control control;
1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004 struct sk_buff *skb;
1005
1006 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1007 return 0;
1008 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
1009 &control);
1010 if (!skb)
1011 return -ENOMEM;
1012 return __ieee80211_if_config(dev, skb, &control);
1013 }
1014
1015 int ieee80211_hw_config(struct ieee80211_local *local)
1016 {
1017 struct ieee80211_channel *chan;
1018 int ret = 0;
1019
1020 if (local->sta_sw_scanning)
1021 chan = local->scan_channel;
1022 else
1023 chan = local->oper_channel;
1024
1025 local->hw.conf.channel = chan;
1026
1027 if (!local->hw.conf.power_level)
1028 local->hw.conf.power_level = chan->max_power;
1029 else
1030 local->hw.conf.power_level = min(chan->max_power,
1031 local->hw.conf.power_level);
1032
1033 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1034
1035 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1036 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1037 wiphy_name(local->hw.wiphy), chan->center_freq);
1038 #endif
1039
1040 if (local->open_count)
1041 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1042
1043 return ret;
1044 }
1045
1046 /**
1047 * ieee80211_handle_ht should be used only after legacy configuration
1048 * has been determined namely band, as ht configuration depends upon
1049 * the hardware's HT abilities for a _specific_ band.
1050 */
1051 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1052 struct ieee80211_ht_info *req_ht_cap,
1053 struct ieee80211_ht_bss_info *req_bss_cap)
1054 {
1055 struct ieee80211_conf *conf = &local->hw.conf;
1056 struct ieee80211_supported_band *sband;
1057 struct ieee80211_ht_info ht_conf;
1058 struct ieee80211_ht_bss_info ht_bss_conf;
1059 int i;
1060 u32 changed = 0;
1061
1062 sband = local->hw.wiphy->bands[conf->channel->band];
1063
1064 /* HT is not supported */
1065 if (!sband->ht_info.ht_supported) {
1066 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1067 return 0;
1068 }
1069
1070 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1071 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1072
1073 if (enable_ht) {
1074 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1075 changed |= BSS_CHANGED_HT;
1076
1077 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1078 ht_conf.ht_supported = 1;
1079
1080 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1081 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1082 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1083
1084 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1085 ht_conf.supp_mcs_set[i] =
1086 sband->ht_info.supp_mcs_set[i] &
1087 req_ht_cap->supp_mcs_set[i];
1088
1089 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1090 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1091 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1092
1093 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1094 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1095
1096 /* if bss configuration changed store the new one */
1097 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1098 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1099 changed |= BSS_CHANGED_HT;
1100 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1101 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1102 }
1103 } else {
1104 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1105 changed |= BSS_CHANGED_HT;
1106 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1107 }
1108
1109 return changed;
1110 }
1111
1112 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1113 u32 changed)
1114 {
1115 struct ieee80211_local *local = sdata->local;
1116
1117 if (!changed)
1118 return;
1119
1120 if (local->ops->bss_info_changed)
1121 local->ops->bss_info_changed(local_to_hw(local),
1122 &sdata->vif,
1123 &sdata->bss_conf,
1124 changed);
1125 }
1126
1127 void ieee80211_reset_erp_info(struct net_device *dev)
1128 {
1129 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1130
1131 sdata->bss_conf.use_cts_prot = 0;
1132 sdata->bss_conf.use_short_preamble = 0;
1133 ieee80211_bss_info_change_notify(sdata,
1134 BSS_CHANGED_ERP_CTS_PROT |
1135 BSS_CHANGED_ERP_PREAMBLE);
1136 }
1137
1138 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1139 struct sk_buff *skb,
1140 struct ieee80211_tx_status *status)
1141 {
1142 struct ieee80211_local *local = hw_to_local(hw);
1143 struct ieee80211_tx_status *saved;
1144 int tmp;
1145
1146 skb->dev = local->mdev;
1147 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1148 if (unlikely(!saved)) {
1149 if (net_ratelimit())
1150 printk(KERN_WARNING "%s: Not enough memory, "
1151 "dropping tx status", skb->dev->name);
1152 /* should be dev_kfree_skb_irq, but due to this function being
1153 * named _irqsafe instead of just _irq we can't be sure that
1154 * people won't call it from non-irq contexts */
1155 dev_kfree_skb_any(skb);
1156 return;
1157 }
1158 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1159 /* copy pointer to saved status into skb->cb for use by tasklet */
1160 memcpy(skb->cb, &saved, sizeof(saved));
1161
1162 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1163 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1164 &local->skb_queue : &local->skb_queue_unreliable, skb);
1165 tmp = skb_queue_len(&local->skb_queue) +
1166 skb_queue_len(&local->skb_queue_unreliable);
1167 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1168 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1169 memcpy(&saved, skb->cb, sizeof(saved));
1170 kfree(saved);
1171 dev_kfree_skb_irq(skb);
1172 tmp--;
1173 I802_DEBUG_INC(local->tx_status_drop);
1174 }
1175 tasklet_schedule(&local->tasklet);
1176 }
1177 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1178
1179 static void ieee80211_tasklet_handler(unsigned long data)
1180 {
1181 struct ieee80211_local *local = (struct ieee80211_local *) data;
1182 struct sk_buff *skb;
1183 struct ieee80211_rx_status rx_status;
1184 struct ieee80211_tx_status *tx_status;
1185 struct ieee80211_ra_tid *ra_tid;
1186
1187 while ((skb = skb_dequeue(&local->skb_queue)) ||
1188 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1189 switch (skb->pkt_type) {
1190 case IEEE80211_RX_MSG:
1191 /* status is in skb->cb */
1192 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1193 /* Clear skb->pkt_type in order to not confuse kernel
1194 * netstack. */
1195 skb->pkt_type = 0;
1196 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1197 break;
1198 case IEEE80211_TX_STATUS_MSG:
1199 /* get pointer to saved status out of skb->cb */
1200 memcpy(&tx_status, skb->cb, sizeof(tx_status));
1201 skb->pkt_type = 0;
1202 ieee80211_tx_status(local_to_hw(local),
1203 skb, tx_status);
1204 kfree(tx_status);
1205 break;
1206 case IEEE80211_DELBA_MSG:
1207 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1208 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1209 ra_tid->ra, ra_tid->tid);
1210 dev_kfree_skb(skb);
1211 break;
1212 case IEEE80211_ADDBA_MSG:
1213 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1214 ieee80211_start_tx_ba_cb(local_to_hw(local),
1215 ra_tid->ra, ra_tid->tid);
1216 dev_kfree_skb(skb);
1217 break ;
1218 default: /* should never get here! */
1219 printk(KERN_ERR "%s: Unknown message type (%d)\n",
1220 wiphy_name(local->hw.wiphy), skb->pkt_type);
1221 dev_kfree_skb(skb);
1222 break;
1223 }
1224 }
1225 }
1226
1227 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1228 * make a prepared TX frame (one that has been given to hw) to look like brand
1229 * new IEEE 802.11 frame that is ready to go through TX processing again.
1230 * Also, tx_packet_data in cb is restored from tx_control. */
1231 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1232 struct ieee80211_key *key,
1233 struct sk_buff *skb,
1234 struct ieee80211_tx_control *control)
1235 {
1236 int hdrlen, iv_len, mic_len;
1237 struct ieee80211_tx_packet_data *pkt_data;
1238
1239 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1240 pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
1241 pkt_data->flags = 0;
1242 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1243 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1244 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1245 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1246 if (control->flags & IEEE80211_TXCTL_REQUEUE)
1247 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
1248 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1249 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
1250 pkt_data->queue = control->queue;
1251
1252 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1253
1254 if (!key)
1255 goto no_key;
1256
1257 switch (key->conf.alg) {
1258 case ALG_WEP:
1259 iv_len = WEP_IV_LEN;
1260 mic_len = WEP_ICV_LEN;
1261 break;
1262 case ALG_TKIP:
1263 iv_len = TKIP_IV_LEN;
1264 mic_len = TKIP_ICV_LEN;
1265 break;
1266 case ALG_CCMP:
1267 iv_len = CCMP_HDR_LEN;
1268 mic_len = CCMP_MIC_LEN;
1269 break;
1270 default:
1271 goto no_key;
1272 }
1273
1274 if (skb->len >= mic_len &&
1275 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1276 skb_trim(skb, skb->len - mic_len);
1277 if (skb->len >= iv_len && skb->len > hdrlen) {
1278 memmove(skb->data + iv_len, skb->data, hdrlen);
1279 skb_pull(skb, iv_len);
1280 }
1281
1282 no_key:
1283 {
1284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1285 u16 fc = le16_to_cpu(hdr->frame_control);
1286 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1287 fc &= ~IEEE80211_STYPE_QOS_DATA;
1288 hdr->frame_control = cpu_to_le16(fc);
1289 memmove(skb->data + 2, skb->data, hdrlen - 2);
1290 skb_pull(skb, 2);
1291 }
1292 }
1293 }
1294
1295 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1296 struct sta_info *sta,
1297 struct sk_buff *skb,
1298 struct ieee80211_tx_status *status)
1299 {
1300 sta->tx_filtered_count++;
1301
1302 /*
1303 * Clear the TX filter mask for this STA when sending the next
1304 * packet. If the STA went to power save mode, this will happen
1305 * happen when it wakes up for the next time.
1306 */
1307 sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1308
1309 /*
1310 * This code races in the following way:
1311 *
1312 * (1) STA sends frame indicating it will go to sleep and does so
1313 * (2) hardware/firmware adds STA to filter list, passes frame up
1314 * (3) hardware/firmware processes TX fifo and suppresses a frame
1315 * (4) we get TX status before having processed the frame and
1316 * knowing that the STA has gone to sleep.
1317 *
1318 * This is actually quite unlikely even when both those events are
1319 * processed from interrupts coming in quickly after one another or
1320 * even at the same time because we queue both TX status events and
1321 * RX frames to be processed by a tasklet and process them in the
1322 * same order that they were received or TX status last. Hence, there
1323 * is no race as long as the frame RX is processed before the next TX
1324 * status, which drivers can ensure, see below.
1325 *
1326 * Note that this can only happen if the hardware or firmware can
1327 * actually add STAs to the filter list, if this is done by the
1328 * driver in response to set_tim() (which will only reduce the race
1329 * this whole filtering tries to solve, not completely solve it)
1330 * this situation cannot happen.
1331 *
1332 * To completely solve this race drivers need to make sure that they
1333 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1334 * functions and
1335 * (b) always process RX events before TX status events if ordering
1336 * can be unknown, for example with different interrupt status
1337 * bits.
1338 */
1339 if (sta->flags & WLAN_STA_PS &&
1340 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1341 ieee80211_remove_tx_extra(local, sta->key, skb,
1342 &status->control);
1343 skb_queue_tail(&sta->tx_filtered, skb);
1344 return;
1345 }
1346
1347 if (!(sta->flags & WLAN_STA_PS) &&
1348 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1349 /* Software retry the packet once */
1350 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1351 ieee80211_remove_tx_extra(local, sta->key, skb,
1352 &status->control);
1353 dev_queue_xmit(skb);
1354 return;
1355 }
1356
1357 if (net_ratelimit())
1358 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1359 "queue_len=%d PS=%d @%lu\n",
1360 wiphy_name(local->hw.wiphy),
1361 skb_queue_len(&sta->tx_filtered),
1362 !!(sta->flags & WLAN_STA_PS), jiffies);
1363 dev_kfree_skb(skb);
1364 }
1365
1366 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1367 struct ieee80211_tx_status *status)
1368 {
1369 struct sk_buff *skb2;
1370 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1371 struct ieee80211_local *local = hw_to_local(hw);
1372 u16 frag, type;
1373 struct ieee80211_tx_status_rtap_hdr *rthdr;
1374 struct ieee80211_sub_if_data *sdata;
1375 struct net_device *prev_dev = NULL;
1376
1377 if (!status) {
1378 printk(KERN_ERR
1379 "%s: ieee80211_tx_status called with NULL status\n",
1380 wiphy_name(local->hw.wiphy));
1381 dev_kfree_skb(skb);
1382 return;
1383 }
1384
1385 rcu_read_lock();
1386
1387 if (status->excessive_retries) {
1388 struct sta_info *sta;
1389 sta = sta_info_get(local, hdr->addr1);
1390 if (sta) {
1391 if (sta->flags & WLAN_STA_PS) {
1392 /*
1393 * The STA is in power save mode, so assume
1394 * that this TX packet failed because of that.
1395 */
1396 status->excessive_retries = 0;
1397 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1398 ieee80211_handle_filtered_frame(local, sta,
1399 skb, status);
1400 rcu_read_unlock();
1401 return;
1402 }
1403 }
1404 }
1405
1406 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1407 struct sta_info *sta;
1408 sta = sta_info_get(local, hdr->addr1);
1409 if (sta) {
1410 ieee80211_handle_filtered_frame(local, sta, skb,
1411 status);
1412 rcu_read_unlock();
1413 return;
1414 }
1415 } else
1416 rate_control_tx_status(local->mdev, skb, status);
1417
1418 rcu_read_unlock();
1419
1420 ieee80211_led_tx(local, 0);
1421
1422 /* SNMP counters
1423 * Fragments are passed to low-level drivers as separate skbs, so these
1424 * are actually fragments, not frames. Update frame counters only for
1425 * the first fragment of the frame. */
1426
1427 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1428 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1429
1430 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1431 if (frag == 0) {
1432 local->dot11TransmittedFrameCount++;
1433 if (is_multicast_ether_addr(hdr->addr1))
1434 local->dot11MulticastTransmittedFrameCount++;
1435 if (status->retry_count > 0)
1436 local->dot11RetryCount++;
1437 if (status->retry_count > 1)
1438 local->dot11MultipleRetryCount++;
1439 }
1440
1441 /* This counter shall be incremented for an acknowledged MPDU
1442 * with an individual address in the address 1 field or an MPDU
1443 * with a multicast address in the address 1 field of type Data
1444 * or Management. */
1445 if (!is_multicast_ether_addr(hdr->addr1) ||
1446 type == IEEE80211_FTYPE_DATA ||
1447 type == IEEE80211_FTYPE_MGMT)
1448 local->dot11TransmittedFragmentCount++;
1449 } else {
1450 if (frag == 0)
1451 local->dot11FailedCount++;
1452 }
1453
1454 /* this was a transmitted frame, but now we want to reuse it */
1455 skb_orphan(skb);
1456
1457 /*
1458 * This is a bit racy but we can avoid a lot of work
1459 * with this test...
1460 */
1461 if (!local->monitors && !local->cooked_mntrs) {
1462 dev_kfree_skb(skb);
1463 return;
1464 }
1465
1466 /* send frame to monitor interfaces now */
1467
1468 if (skb_headroom(skb) < sizeof(*rthdr)) {
1469 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1470 dev_kfree_skb(skb);
1471 return;
1472 }
1473
1474 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1475 skb_push(skb, sizeof(*rthdr));
1476
1477 memset(rthdr, 0, sizeof(*rthdr));
1478 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1479 rthdr->hdr.it_present =
1480 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1481 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1482
1483 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1484 !is_multicast_ether_addr(hdr->addr1))
1485 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1486
1487 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1488 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1489 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1490 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1491 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1492
1493 rthdr->data_retries = status->retry_count;
1494
1495 /* XXX: is this sufficient for BPF? */
1496 skb_set_mac_header(skb, 0);
1497 skb->ip_summed = CHECKSUM_UNNECESSARY;
1498 skb->pkt_type = PACKET_OTHERHOST;
1499 skb->protocol = htons(ETH_P_802_2);
1500 memset(skb->cb, 0, sizeof(skb->cb));
1501
1502 rcu_read_lock();
1503 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1504 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1505 if (!netif_running(sdata->dev))
1506 continue;
1507
1508 if (prev_dev) {
1509 skb2 = skb_clone(skb, GFP_ATOMIC);
1510 if (skb2) {
1511 skb2->dev = prev_dev;
1512 netif_rx(skb2);
1513 }
1514 }
1515
1516 prev_dev = sdata->dev;
1517 }
1518 }
1519 if (prev_dev) {
1520 skb->dev = prev_dev;
1521 netif_rx(skb);
1522 skb = NULL;
1523 }
1524 rcu_read_unlock();
1525 dev_kfree_skb(skb);
1526 }
1527 EXPORT_SYMBOL(ieee80211_tx_status);
1528
1529 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1530 const struct ieee80211_ops *ops)
1531 {
1532 struct ieee80211_local *local;
1533 int priv_size;
1534 struct wiphy *wiphy;
1535
1536 /* Ensure 32-byte alignment of our private data and hw private data.
1537 * We use the wiphy priv data for both our ieee80211_local and for
1538 * the driver's private data
1539 *
1540 * In memory it'll be like this:
1541 *
1542 * +-------------------------+
1543 * | struct wiphy |
1544 * +-------------------------+
1545 * | struct ieee80211_local |
1546 * +-------------------------+
1547 * | driver's private data |
1548 * +-------------------------+
1549 *
1550 */
1551 priv_size = ((sizeof(struct ieee80211_local) +
1552 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1553 priv_data_len;
1554
1555 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1556
1557 if (!wiphy)
1558 return NULL;
1559
1560 wiphy->privid = mac80211_wiphy_privid;
1561
1562 local = wiphy_priv(wiphy);
1563 local->hw.wiphy = wiphy;
1564
1565 local->hw.priv = (char *)local +
1566 ((sizeof(struct ieee80211_local) +
1567 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1568
1569 BUG_ON(!ops->tx);
1570 BUG_ON(!ops->start);
1571 BUG_ON(!ops->stop);
1572 BUG_ON(!ops->config);
1573 BUG_ON(!ops->add_interface);
1574 BUG_ON(!ops->remove_interface);
1575 BUG_ON(!ops->configure_filter);
1576 local->ops = ops;
1577
1578 local->hw.queues = 1; /* default */
1579
1580 local->bridge_packets = 1;
1581
1582 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1583 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1584 local->short_retry_limit = 7;
1585 local->long_retry_limit = 4;
1586 local->hw.conf.radio_enabled = 1;
1587
1588 INIT_LIST_HEAD(&local->interfaces);
1589
1590 spin_lock_init(&local->key_lock);
1591
1592 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1593
1594 sta_info_init(local);
1595
1596 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1597 (unsigned long)local);
1598 tasklet_disable(&local->tx_pending_tasklet);
1599
1600 tasklet_init(&local->tasklet,
1601 ieee80211_tasklet_handler,
1602 (unsigned long) local);
1603 tasklet_disable(&local->tasklet);
1604
1605 skb_queue_head_init(&local->skb_queue);
1606 skb_queue_head_init(&local->skb_queue_unreliable);
1607
1608 return local_to_hw(local);
1609 }
1610 EXPORT_SYMBOL(ieee80211_alloc_hw);
1611
1612 int ieee80211_register_hw(struct ieee80211_hw *hw)
1613 {
1614 struct ieee80211_local *local = hw_to_local(hw);
1615 const char *name;
1616 int result;
1617 enum ieee80211_band band;
1618 struct net_device *mdev;
1619 struct ieee80211_sub_if_data *sdata;
1620
1621 /*
1622 * generic code guarantees at least one band,
1623 * set this very early because much code assumes
1624 * that hw.conf.channel is assigned
1625 */
1626 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1627 struct ieee80211_supported_band *sband;
1628
1629 sband = local->hw.wiphy->bands[band];
1630 if (sband) {
1631 /* init channel we're on */
1632 local->hw.conf.channel =
1633 local->oper_channel =
1634 local->scan_channel = &sband->channels[0];
1635 break;
1636 }
1637 }
1638
1639 result = wiphy_register(local->hw.wiphy);
1640 if (result < 0)
1641 return result;
1642
1643 /* for now, mdev needs sub_if_data :/ */
1644 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1645 "wmaster%d", ether_setup);
1646 if (!mdev)
1647 goto fail_mdev_alloc;
1648
1649 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1650 mdev->ieee80211_ptr = &sdata->wdev;
1651 sdata->wdev.wiphy = local->hw.wiphy;
1652
1653 local->mdev = mdev;
1654
1655 ieee80211_rx_bss_list_init(mdev);
1656
1657 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1658 mdev->open = ieee80211_master_open;
1659 mdev->stop = ieee80211_master_stop;
1660 mdev->type = ARPHRD_IEEE80211;
1661 mdev->header_ops = &ieee80211_header_ops;
1662 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1663
1664 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1665 sdata->dev = mdev;
1666 sdata->local = local;
1667 sdata->u.ap.force_unicast_rateidx = -1;
1668 sdata->u.ap.max_ratectrl_rateidx = -1;
1669 ieee80211_if_sdata_init(sdata);
1670
1671 /* no RCU needed since we're still during init phase */
1672 list_add_tail(&sdata->list, &local->interfaces);
1673
1674 name = wiphy_dev(local->hw.wiphy)->driver->name;
1675 local->hw.workqueue = create_singlethread_workqueue(name);
1676 if (!local->hw.workqueue) {
1677 result = -ENOMEM;
1678 goto fail_workqueue;
1679 }
1680
1681 /*
1682 * The hardware needs headroom for sending the frame,
1683 * and we need some headroom for passing the frame to monitor
1684 * interfaces, but never both at the same time.
1685 */
1686 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1687 sizeof(struct ieee80211_tx_status_rtap_hdr));
1688
1689 debugfs_hw_add(local);
1690
1691 local->hw.conf.beacon_int = 1000;
1692
1693 local->wstats_flags |= local->hw.max_rssi ?
1694 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1695 local->wstats_flags |= local->hw.max_signal ?
1696 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1697 local->wstats_flags |= local->hw.max_noise ?
1698 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1699 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1700 local->wstats_flags |= IW_QUAL_DBM;
1701
1702 result = sta_info_start(local);
1703 if (result < 0)
1704 goto fail_sta_info;
1705
1706 rtnl_lock();
1707 result = dev_alloc_name(local->mdev, local->mdev->name);
1708 if (result < 0)
1709 goto fail_dev;
1710
1711 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1712 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1713
1714 result = register_netdevice(local->mdev);
1715 if (result < 0)
1716 goto fail_dev;
1717
1718 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1719 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1720
1721 result = ieee80211_init_rate_ctrl_alg(local,
1722 hw->rate_control_algorithm);
1723 if (result < 0) {
1724 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1725 "algorithm\n", wiphy_name(local->hw.wiphy));
1726 goto fail_rate;
1727 }
1728
1729 result = ieee80211_wep_init(local);
1730
1731 if (result < 0) {
1732 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1733 wiphy_name(local->hw.wiphy));
1734 goto fail_wep;
1735 }
1736
1737 ieee80211_install_qdisc(local->mdev);
1738
1739 /* add one default STA interface */
1740 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1741 IEEE80211_IF_TYPE_STA, NULL);
1742 if (result)
1743 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1744 wiphy_name(local->hw.wiphy));
1745
1746 local->reg_state = IEEE80211_DEV_REGISTERED;
1747 rtnl_unlock();
1748
1749 ieee80211_led_init(local);
1750
1751 return 0;
1752
1753 fail_wep:
1754 rate_control_deinitialize(local);
1755 fail_rate:
1756 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1757 unregister_netdevice(local->mdev);
1758 fail_dev:
1759 rtnl_unlock();
1760 sta_info_stop(local);
1761 fail_sta_info:
1762 debugfs_hw_del(local);
1763 destroy_workqueue(local->hw.workqueue);
1764 fail_workqueue:
1765 ieee80211_if_free(local->mdev);
1766 local->mdev = NULL;
1767 fail_mdev_alloc:
1768 wiphy_unregister(local->hw.wiphy);
1769 return result;
1770 }
1771 EXPORT_SYMBOL(ieee80211_register_hw);
1772
1773 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1774 {
1775 struct ieee80211_local *local = hw_to_local(hw);
1776 struct ieee80211_sub_if_data *sdata, *tmp;
1777
1778 tasklet_kill(&local->tx_pending_tasklet);
1779 tasklet_kill(&local->tasklet);
1780
1781 rtnl_lock();
1782
1783 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1784
1785 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1786
1787 /*
1788 * At this point, interface list manipulations are fine
1789 * because the driver cannot be handing us frames any
1790 * more and the tasklet is killed.
1791 */
1792
1793 /*
1794 * First, we remove all non-master interfaces. Do this because they
1795 * may have bss pointer dependency on the master, and when we free
1796 * the master these would be freed as well, breaking our list
1797 * iteration completely.
1798 */
1799 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1800 if (sdata->dev == local->mdev)
1801 continue;
1802 list_del(&sdata->list);
1803 __ieee80211_if_del(local, sdata);
1804 }
1805
1806 /* then, finally, remove the master interface */
1807 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1808
1809 rtnl_unlock();
1810
1811 ieee80211_rx_bss_list_deinit(local->mdev);
1812 ieee80211_clear_tx_pending(local);
1813 sta_info_stop(local);
1814 rate_control_deinitialize(local);
1815 debugfs_hw_del(local);
1816
1817 if (skb_queue_len(&local->skb_queue)
1818 || skb_queue_len(&local->skb_queue_unreliable))
1819 printk(KERN_WARNING "%s: skb_queue not empty\n",
1820 wiphy_name(local->hw.wiphy));
1821 skb_queue_purge(&local->skb_queue);
1822 skb_queue_purge(&local->skb_queue_unreliable);
1823
1824 destroy_workqueue(local->hw.workqueue);
1825 wiphy_unregister(local->hw.wiphy);
1826 ieee80211_wep_free(local);
1827 ieee80211_led_exit(local);
1828 ieee80211_if_free(local->mdev);
1829 local->mdev = NULL;
1830 }
1831 EXPORT_SYMBOL(ieee80211_unregister_hw);
1832
1833 void ieee80211_free_hw(struct ieee80211_hw *hw)
1834 {
1835 struct ieee80211_local *local = hw_to_local(hw);
1836
1837 wiphy_free(local->hw.wiphy);
1838 }
1839 EXPORT_SYMBOL(ieee80211_free_hw);
1840
1841 static int __init ieee80211_init(void)
1842 {
1843 struct sk_buff *skb;
1844 int ret;
1845
1846 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1847
1848 ret = rc80211_pid_init();
1849 if (ret)
1850 goto out;
1851
1852 ret = ieee80211_wme_register();
1853 if (ret) {
1854 printk(KERN_DEBUG "ieee80211_init: failed to "
1855 "initialize WME (err=%d)\n", ret);
1856 goto out_cleanup_pid;
1857 }
1858
1859 ieee80211_debugfs_netdev_init();
1860
1861 return 0;
1862
1863 out_cleanup_pid:
1864 rc80211_pid_exit();
1865 out:
1866 return ret;
1867 }
1868
1869 static void __exit ieee80211_exit(void)
1870 {
1871 rc80211_pid_exit();
1872
1873 /*
1874 * For key todo, it'll be empty by now but the work
1875 * might still be scheduled.
1876 */
1877 flush_scheduled_work();
1878
1879 if (mesh_allocated)
1880 ieee80211s_stop();
1881
1882 ieee80211_wme_unregister();
1883 ieee80211_debugfs_netdev_exit();
1884 }
1885
1886
1887 subsys_initcall(ieee80211_init);
1888 module_exit(ieee80211_exit);
1889
1890 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1891 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree