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cfg80211: keep track of supported interface modes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / main.c
blob396cfb2d0f4646fdd93623131309e9b385f45e44
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_i.h"
28 #include "rate.h"
29 #include "mesh.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 /*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46 } __attribute__ ((packed));
47
48 /* common interface routines */
49
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51 {
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54 }
55
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
58 {
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
61
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
64
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
67
68 if (local->monitors)
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
70
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
73
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
76
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
79
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
82
83 changed_flags = local->filter_flags ^ new_flags;
84
85 /* be a bit nasty */
86 new_flags |= (1<<31);
87
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
92
93 WARN_ON(new_flags & (1<<31));
94
95 local->filter_flags = new_flags & ~(1<<31);
96 }
97
98 /* master interface */
99
100 static int ieee80211_master_open(struct net_device *dev)
101 {
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
105
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
108 if (netif_running(sdata->dev)) {
109 res = 0;
110 break;
111 }
112 }
113
114 if (res)
115 return res;
116
117 netif_tx_start_all_queues(local->mdev);
118
119 return 0;
120 }
121
122 static int ieee80211_master_stop(struct net_device *dev)
123 {
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
126
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
129 if (netif_running(sdata->dev))
130 dev_close(sdata->dev);
131
132 return 0;
133 }
134
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
136 {
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
138
139 ieee80211_configure_filter(local);
140 }
141
142 /* regular interfaces */
143
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
145 {
146 int meshhdrlen;
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
148
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
150
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
153 if (new_mtu < 256 ||
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
155 return -EINVAL;
156 }
157
158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
161 dev->mtu = new_mtu;
162 return 0;
163 }
164
165 static inline int identical_mac_addr_allowed(int type1, int type2)
166 {
167 return (type1 == IEEE80211_IF_TYPE_MNTR ||
168 type2 == IEEE80211_IF_TYPE_MNTR ||
169 (type1 == IEEE80211_IF_TYPE_AP &&
170 type2 == IEEE80211_IF_TYPE_WDS) ||
171 (type1 == IEEE80211_IF_TYPE_WDS &&
172 (type2 == IEEE80211_IF_TYPE_WDS ||
173 type2 == IEEE80211_IF_TYPE_AP)) ||
174 (type1 == IEEE80211_IF_TYPE_AP &&
175 type2 == IEEE80211_IF_TYPE_VLAN) ||
176 (type1 == IEEE80211_IF_TYPE_VLAN &&
177 (type2 == IEEE80211_IF_TYPE_AP ||
178 type2 == IEEE80211_IF_TYPE_VLAN)));
179 }
180
181 static int ieee80211_open(struct net_device *dev)
182 {
183 struct ieee80211_sub_if_data *sdata, *nsdata;
184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
185 struct sta_info *sta;
186 struct ieee80211_if_init_conf conf;
187 u32 changed = 0;
188 int res;
189 bool need_hw_reconfig = 0;
190 u8 null_addr[ETH_ALEN] = {0};
191
192 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
193
194 /* fail early if user set an invalid address */
195 if (compare_ether_addr(dev->dev_addr, null_addr) &&
196 !is_valid_ether_addr(dev->dev_addr))
197 return -EADDRNOTAVAIL;
198
199 /* we hold the RTNL here so can safely walk the list */
200 list_for_each_entry(nsdata, &local->interfaces, list) {
201 struct net_device *ndev = nsdata->dev;
202
203 if (ndev != dev && netif_running(ndev)) {
204 /*
205 * Allow only a single IBSS interface to be up at any
206 * time. This is restricted because beacon distribution
207 * cannot work properly if both are in the same IBSS.
208 *
209 * To remove this restriction we'd have to disallow them
210 * from setting the same SSID on different IBSS interfaces
211 * belonging to the same hardware. Then, however, we're
212 * faced with having to adopt two different TSF timers...
213 */
214 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
215 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
216 return -EBUSY;
217
218 /*
219 * The remaining checks are only performed for interfaces
220 * with the same MAC address.
221 */
222 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
223 continue;
224
225 /*
226 * check whether it may have the same address
227 */
228 if (!identical_mac_addr_allowed(sdata->vif.type,
229 nsdata->vif.type))
230 return -ENOTUNIQ;
231
232 /*
233 * can only add VLANs to enabled APs
234 */
235 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
236 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
237 sdata->bss = &nsdata->u.ap;
238 }
239 }
240
241 switch (sdata->vif.type) {
242 case IEEE80211_IF_TYPE_WDS:
243 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
244 return -ENOLINK;
245 break;
246 case IEEE80211_IF_TYPE_VLAN:
247 if (!sdata->bss)
248 return -ENOLINK;
249 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
250 break;
251 case IEEE80211_IF_TYPE_AP:
252 sdata->bss = &sdata->u.ap;
253 break;
254 case IEEE80211_IF_TYPE_MESH_POINT:
255 /* mesh ifaces must set allmulti to forward mcast traffic */
256 atomic_inc(&local->iff_allmultis);
257 break;
258 case IEEE80211_IF_TYPE_STA:
259 case IEEE80211_IF_TYPE_MNTR:
260 case IEEE80211_IF_TYPE_IBSS:
261 /* no special treatment */
262 break;
263 case IEEE80211_IF_TYPE_INVALID:
264 /* cannot happen */
265 WARN_ON(1);
266 break;
267 }
268
269 if (local->open_count == 0) {
270 res = 0;
271 if (local->ops->start)
272 res = local->ops->start(local_to_hw(local));
273 if (res)
274 goto err_del_bss;
275 need_hw_reconfig = 1;
276 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
277 }
278
279 /*
280 * Check all interfaces and copy the hopefully now-present
281 * MAC address to those that have the special null one.
282 */
283 list_for_each_entry(nsdata, &local->interfaces, list) {
284 struct net_device *ndev = nsdata->dev;
285
286 /*
287 * No need to check netif_running since we do not allow
288 * it to start up with this invalid address.
289 */
290 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
291 memcpy(ndev->dev_addr,
292 local->hw.wiphy->perm_addr,
293 ETH_ALEN);
294 }
295
296 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
297 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
298 ETH_ALEN);
299
300 /*
301 * Validate the MAC address for this device.
302 */
303 if (!is_valid_ether_addr(dev->dev_addr)) {
304 if (!local->open_count && local->ops->stop)
305 local->ops->stop(local_to_hw(local));
306 return -EADDRNOTAVAIL;
307 }
308
309 switch (sdata->vif.type) {
310 case IEEE80211_IF_TYPE_VLAN:
311 /* no need to tell driver */
312 break;
313 case IEEE80211_IF_TYPE_MNTR:
314 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
315 local->cooked_mntrs++;
316 break;
317 }
318
319 /* must be before the call to ieee80211_configure_filter */
320 local->monitors++;
321 if (local->monitors == 1)
322 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
323
324 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
325 local->fif_fcsfail++;
326 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
327 local->fif_plcpfail++;
328 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
329 local->fif_control++;
330 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
331 local->fif_other_bss++;
332
333 netif_addr_lock_bh(local->mdev);
334 ieee80211_configure_filter(local);
335 netif_addr_unlock_bh(local->mdev);
336 break;
337 case IEEE80211_IF_TYPE_STA:
338 case IEEE80211_IF_TYPE_IBSS:
339 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
340 /* fall through */
341 default:
342 conf.vif = &sdata->vif;
343 conf.type = sdata->vif.type;
344 conf.mac_addr = dev->dev_addr;
345 res = local->ops->add_interface(local_to_hw(local), &conf);
346 if (res)
347 goto err_stop;
348
349 if (ieee80211_vif_is_mesh(&sdata->vif))
350 ieee80211_start_mesh(sdata);
351 changed |= ieee80211_reset_erp_info(sdata);
352 ieee80211_bss_info_change_notify(sdata, changed);
353 ieee80211_enable_keys(sdata);
354
355 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
356 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
357 netif_carrier_off(dev);
358 else
359 netif_carrier_on(dev);
360 }
361
362 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
363 /* Create STA entry for the WDS peer */
364 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
365 GFP_KERNEL);
366 if (!sta) {
367 res = -ENOMEM;
368 goto err_del_interface;
369 }
370
371 /* no locking required since STA is not live yet */
372 sta->flags |= WLAN_STA_AUTHORIZED;
373
374 res = sta_info_insert(sta);
375 if (res) {
376 /* STA has been freed */
377 goto err_del_interface;
378 }
379 }
380
381 if (local->open_count == 0) {
382 res = dev_open(local->mdev);
383 WARN_ON(res);
384 if (res)
385 goto err_del_interface;
386 tasklet_enable(&local->tx_pending_tasklet);
387 tasklet_enable(&local->tasklet);
388 }
389
390 /*
391 * set_multicast_list will be invoked by the networking core
392 * which will check whether any increments here were done in
393 * error and sync them down to the hardware as filter flags.
394 */
395 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
396 atomic_inc(&local->iff_allmultis);
397
398 if (sdata->flags & IEEE80211_SDATA_PROMISC)
399 atomic_inc(&local->iff_promiscs);
400
401 local->open_count++;
402 if (need_hw_reconfig)
403 ieee80211_hw_config(local);
404
405 /*
406 * ieee80211_sta_work is disabled while network interface
407 * is down. Therefore, some configuration changes may not
408 * yet be effective. Trigger execution of ieee80211_sta_work
409 * to fix this.
410 */
411 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
412 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
413 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
414 queue_work(local->hw.workqueue, &ifsta->work);
415 }
416
417 netif_tx_start_all_queues(dev);
418
419 return 0;
420 err_del_interface:
421 local->ops->remove_interface(local_to_hw(local), &conf);
422 err_stop:
423 if (!local->open_count && local->ops->stop)
424 local->ops->stop(local_to_hw(local));
425 err_del_bss:
426 sdata->bss = NULL;
427 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
428 list_del(&sdata->u.vlan.list);
429 return res;
430 }
431
432 static int ieee80211_stop(struct net_device *dev)
433 {
434 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
435 struct ieee80211_local *local = sdata->local;
436 struct ieee80211_if_init_conf conf;
437 struct sta_info *sta;
438
439 /*
440 * Stop TX on this interface first.
441 */
442 netif_tx_stop_all_queues(dev);
443
444 /*
445 * Now delete all active aggregation sessions.
446 */
447 rcu_read_lock();
448
449 list_for_each_entry_rcu(sta, &local->sta_list, list) {
450 if (sta->sdata == sdata)
451 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
452 }
453
454 rcu_read_unlock();
455
456 /*
457 * Remove all stations associated with this interface.
458 *
459 * This must be done before calling ops->remove_interface()
460 * because otherwise we can later invoke ops->sta_notify()
461 * whenever the STAs are removed, and that invalidates driver
462 * assumptions about always getting a vif pointer that is valid
463 * (because if we remove a STA after ops->remove_interface()
464 * the driver will have removed the vif info already!)
465 *
466 * We could relax this and only unlink the stations from the
467 * hash table and list but keep them on a per-sdata list that
468 * will be inserted back again when the interface is brought
469 * up again, but I don't currently see a use case for that,
470 * except with WDS which gets a STA entry created when it is
471 * brought up.
472 */
473 sta_info_flush(local, sdata);
474
475 /*
476 * Don't count this interface for promisc/allmulti while it
477 * is down. dev_mc_unsync() will invoke set_multicast_list
478 * on the master interface which will sync these down to the
479 * hardware as filter flags.
480 */
481 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
482 atomic_dec(&local->iff_allmultis);
483
484 if (sdata->flags & IEEE80211_SDATA_PROMISC)
485 atomic_dec(&local->iff_promiscs);
486
487 dev_mc_unsync(local->mdev, dev);
488
489 /* APs need special treatment */
490 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
491 struct ieee80211_sub_if_data *vlan, *tmp;
492 struct beacon_data *old_beacon = sdata->u.ap.beacon;
493
494 /* remove beacon */
495 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
496 synchronize_rcu();
497 kfree(old_beacon);
498
499 /* down all dependent devices, that is VLANs */
500 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
501 u.vlan.list)
502 dev_close(vlan->dev);
503 WARN_ON(!list_empty(&sdata->u.ap.vlans));
504 }
505
506 local->open_count--;
507
508 switch (sdata->vif.type) {
509 case IEEE80211_IF_TYPE_VLAN:
510 list_del(&sdata->u.vlan.list);
511 /* no need to tell driver */
512 break;
513 case IEEE80211_IF_TYPE_MNTR:
514 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
515 local->cooked_mntrs--;
516 break;
517 }
518
519 local->monitors--;
520 if (local->monitors == 0)
521 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
522
523 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
524 local->fif_fcsfail--;
525 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
526 local->fif_plcpfail--;
527 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
528 local->fif_control--;
529 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
530 local->fif_other_bss--;
531
532 netif_addr_lock_bh(local->mdev);
533 ieee80211_configure_filter(local);
534 netif_addr_unlock_bh(local->mdev);
535 break;
536 case IEEE80211_IF_TYPE_MESH_POINT:
537 /* allmulti is always set on mesh ifaces */
538 atomic_dec(&local->iff_allmultis);
539 /* fall through */
540 case IEEE80211_IF_TYPE_STA:
541 case IEEE80211_IF_TYPE_IBSS:
542 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
543 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
544 del_timer_sync(&sdata->u.sta.timer);
545 /*
546 * When we get here, the interface is marked down.
547 * Call synchronize_rcu() to wait for the RX path
548 * should it be using the interface and enqueuing
549 * frames at this very time on another CPU.
550 */
551 synchronize_rcu();
552 skb_queue_purge(&sdata->u.sta.skb_queue);
553
554 if (local->scan_dev == sdata->dev) {
555 if (!local->ops->hw_scan) {
556 local->sta_sw_scanning = 0;
557 cancel_delayed_work(&local->scan_work);
558 } else
559 local->sta_hw_scanning = 0;
560 }
561
562 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
563 kfree(sdata->u.sta.extra_ie);
564 sdata->u.sta.extra_ie = NULL;
565 sdata->u.sta.extra_ie_len = 0;
566 /* fall through */
567 default:
568 conf.vif = &sdata->vif;
569 conf.type = sdata->vif.type;
570 conf.mac_addr = dev->dev_addr;
571 /* disable all keys for as long as this netdev is down */
572 ieee80211_disable_keys(sdata);
573 local->ops->remove_interface(local_to_hw(local), &conf);
574 }
575
576 sdata->bss = NULL;
577
578 if (local->open_count == 0) {
579 if (netif_running(local->mdev))
580 dev_close(local->mdev);
581
582 if (local->ops->stop)
583 local->ops->stop(local_to_hw(local));
584
585 ieee80211_led_radio(local, 0);
586
587 flush_workqueue(local->hw.workqueue);
588
589 tasklet_disable(&local->tx_pending_tasklet);
590 tasklet_disable(&local->tasklet);
591 }
592
593 return 0;
594 }
595
596 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
597 {
598 struct ieee80211_local *local = hw_to_local(hw);
599 struct sta_info *sta;
600 struct ieee80211_sub_if_data *sdata;
601 u16 start_seq_num;
602 u8 *state;
603 int ret;
604 DECLARE_MAC_BUF(mac);
605
606 if (tid >= STA_TID_NUM)
607 return -EINVAL;
608
609 #ifdef CONFIG_MAC80211_HT_DEBUG
610 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
611 print_mac(mac, ra), tid);
612 #endif /* CONFIG_MAC80211_HT_DEBUG */
613
614 rcu_read_lock();
615
616 sta = sta_info_get(local, ra);
617 if (!sta) {
618 #ifdef CONFIG_MAC80211_HT_DEBUG
619 printk(KERN_DEBUG "Could not find the station\n");
620 #endif
621 ret = -ENOENT;
622 goto exit;
623 }
624
625 spin_lock_bh(&sta->lock);
626
627 /* we have tried too many times, receiver does not want A-MPDU */
628 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
629 ret = -EBUSY;
630 goto err_unlock_sta;
631 }
632
633 state = &sta->ampdu_mlme.tid_state_tx[tid];
634 /* check if the TID is not in aggregation flow already */
635 if (*state != HT_AGG_STATE_IDLE) {
636 #ifdef CONFIG_MAC80211_HT_DEBUG
637 printk(KERN_DEBUG "BA request denied - session is not "
638 "idle on tid %u\n", tid);
639 #endif /* CONFIG_MAC80211_HT_DEBUG */
640 ret = -EAGAIN;
641 goto err_unlock_sta;
642 }
643
644 /* prepare A-MPDU MLME for Tx aggregation */
645 sta->ampdu_mlme.tid_tx[tid] =
646 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
647 if (!sta->ampdu_mlme.tid_tx[tid]) {
648 #ifdef CONFIG_MAC80211_HT_DEBUG
649 if (net_ratelimit())
650 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
651 tid);
652 #endif
653 ret = -ENOMEM;
654 goto err_unlock_sta;
655 }
656 /* Tx timer */
657 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
658 sta_addba_resp_timer_expired;
659 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
660 (unsigned long)&sta->timer_to_tid[tid];
661 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
662
663 /* create a new queue for this aggregation */
664 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
665
666 /* case no queue is available to aggregation
667 * don't switch to aggregation */
668 if (ret) {
669 #ifdef CONFIG_MAC80211_HT_DEBUG
670 printk(KERN_DEBUG "BA request denied - queue unavailable for"
671 " tid %d\n", tid);
672 #endif /* CONFIG_MAC80211_HT_DEBUG */
673 goto err_unlock_queue;
674 }
675 sdata = sta->sdata;
676
677 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
678 * call back right away, it must see that the flow has begun */
679 *state |= HT_ADDBA_REQUESTED_MSK;
680
681 /* This is slightly racy because the queue isn't stopped */
682 start_seq_num = sta->tid_seq[tid];
683
684 if (local->ops->ampdu_action)
685 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
686 ra, tid, &start_seq_num);
687
688 if (ret) {
689 /* No need to requeue the packets in the agg queue, since we
690 * held the tx lock: no packet could be enqueued to the newly
691 * allocated queue */
692 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
693 #ifdef CONFIG_MAC80211_HT_DEBUG
694 printk(KERN_DEBUG "BA request denied - HW unavailable for"
695 " tid %d\n", tid);
696 #endif /* CONFIG_MAC80211_HT_DEBUG */
697 *state = HT_AGG_STATE_IDLE;
698 goto err_unlock_queue;
699 }
700
701 /* Will put all the packets in the new SW queue */
702 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
703 spin_unlock_bh(&sta->lock);
704
705 /* send an addBA request */
706 sta->ampdu_mlme.dialog_token_allocator++;
707 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
708 sta->ampdu_mlme.dialog_token_allocator;
709 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
710
711
712 ieee80211_send_addba_request(sta->sdata, ra, tid,
713 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
714 sta->ampdu_mlme.tid_tx[tid]->ssn,
715 0x40, 5000);
716 /* activate the timer for the recipient's addBA response */
717 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
718 jiffies + ADDBA_RESP_INTERVAL;
719 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
720 #ifdef CONFIG_MAC80211_HT_DEBUG
721 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
722 #endif
723 goto exit;
724
725 err_unlock_queue:
726 kfree(sta->ampdu_mlme.tid_tx[tid]);
727 sta->ampdu_mlme.tid_tx[tid] = NULL;
728 ret = -EBUSY;
729 err_unlock_sta:
730 spin_unlock_bh(&sta->lock);
731 exit:
732 rcu_read_unlock();
733 return ret;
734 }
735 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
736
737 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
738 u8 *ra, u16 tid,
739 enum ieee80211_back_parties initiator)
740 {
741 struct ieee80211_local *local = hw_to_local(hw);
742 struct sta_info *sta;
743 u8 *state;
744 int ret = 0;
745 DECLARE_MAC_BUF(mac);
746
747 if (tid >= STA_TID_NUM)
748 return -EINVAL;
749
750 rcu_read_lock();
751 sta = sta_info_get(local, ra);
752 if (!sta) {
753 rcu_read_unlock();
754 return -ENOENT;
755 }
756
757 /* check if the TID is in aggregation */
758 state = &sta->ampdu_mlme.tid_state_tx[tid];
759 spin_lock_bh(&sta->lock);
760
761 if (*state != HT_AGG_STATE_OPERATIONAL) {
762 ret = -ENOENT;
763 goto stop_BA_exit;
764 }
765
766 #ifdef CONFIG_MAC80211_HT_DEBUG
767 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
768 print_mac(mac, ra), tid);
769 #endif /* CONFIG_MAC80211_HT_DEBUG */
770
771 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
772
773 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
774 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
775
776 if (local->ops->ampdu_action)
777 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
778 ra, tid, NULL);
779
780 /* case HW denied going back to legacy */
781 if (ret) {
782 WARN_ON(ret != -EBUSY);
783 *state = HT_AGG_STATE_OPERATIONAL;
784 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
785 goto stop_BA_exit;
786 }
787
788 stop_BA_exit:
789 spin_unlock_bh(&sta->lock);
790 rcu_read_unlock();
791 return ret;
792 }
793 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
794
795 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
796 {
797 struct ieee80211_local *local = hw_to_local(hw);
798 struct sta_info *sta;
799 u8 *state;
800 DECLARE_MAC_BUF(mac);
801
802 if (tid >= STA_TID_NUM) {
803 #ifdef CONFIG_MAC80211_HT_DEBUG
804 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
805 tid, STA_TID_NUM);
806 #endif
807 return;
808 }
809
810 rcu_read_lock();
811 sta = sta_info_get(local, ra);
812 if (!sta) {
813 rcu_read_unlock();
814 #ifdef CONFIG_MAC80211_HT_DEBUG
815 printk(KERN_DEBUG "Could not find station: %s\n",
816 print_mac(mac, ra));
817 #endif
818 return;
819 }
820
821 state = &sta->ampdu_mlme.tid_state_tx[tid];
822 spin_lock_bh(&sta->lock);
823
824 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
825 #ifdef CONFIG_MAC80211_HT_DEBUG
826 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
827 *state);
828 #endif
829 spin_unlock_bh(&sta->lock);
830 rcu_read_unlock();
831 return;
832 }
833
834 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
835
836 *state |= HT_ADDBA_DRV_READY_MSK;
837
838 if (*state == HT_AGG_STATE_OPERATIONAL) {
839 #ifdef CONFIG_MAC80211_HT_DEBUG
840 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
841 #endif
842 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
843 }
844 spin_unlock_bh(&sta->lock);
845 rcu_read_unlock();
846 }
847 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
848
849 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
850 {
851 struct ieee80211_local *local = hw_to_local(hw);
852 struct sta_info *sta;
853 u8 *state;
854 int agg_queue;
855 DECLARE_MAC_BUF(mac);
856
857 if (tid >= STA_TID_NUM) {
858 #ifdef CONFIG_MAC80211_HT_DEBUG
859 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
860 tid, STA_TID_NUM);
861 #endif
862 return;
863 }
864
865 #ifdef CONFIG_MAC80211_HT_DEBUG
866 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
867 print_mac(mac, ra), tid);
868 #endif /* CONFIG_MAC80211_HT_DEBUG */
869
870 rcu_read_lock();
871 sta = sta_info_get(local, ra);
872 if (!sta) {
873 #ifdef CONFIG_MAC80211_HT_DEBUG
874 printk(KERN_DEBUG "Could not find station: %s\n",
875 print_mac(mac, ra));
876 #endif
877 rcu_read_unlock();
878 return;
879 }
880 state = &sta->ampdu_mlme.tid_state_tx[tid];
881
882 /* NOTE: no need to use sta->lock in this state check, as
883 * ieee80211_stop_tx_ba_session will let only one stop call to
884 * pass through per sta/tid
885 */
886 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
887 #ifdef CONFIG_MAC80211_HT_DEBUG
888 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
889 #endif
890 rcu_read_unlock();
891 return;
892 }
893
894 if (*state & HT_AGG_STATE_INITIATOR_MSK)
895 ieee80211_send_delba(sta->sdata, ra, tid,
896 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
897
898 agg_queue = sta->tid_to_tx_q[tid];
899
900 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
901
902 /* We just requeued the all the frames that were in the
903 * removed queue, and since we might miss a softirq we do
904 * netif_schedule_queue. ieee80211_wake_queue is not used
905 * here as this queue is not necessarily stopped
906 */
907 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
908 spin_lock_bh(&sta->lock);
909 *state = HT_AGG_STATE_IDLE;
910 sta->ampdu_mlme.addba_req_num[tid] = 0;
911 kfree(sta->ampdu_mlme.tid_tx[tid]);
912 sta->ampdu_mlme.tid_tx[tid] = NULL;
913 spin_unlock_bh(&sta->lock);
914
915 rcu_read_unlock();
916 }
917 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
918
919 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
920 const u8 *ra, u16 tid)
921 {
922 struct ieee80211_local *local = hw_to_local(hw);
923 struct ieee80211_ra_tid *ra_tid;
924 struct sk_buff *skb = dev_alloc_skb(0);
925
926 if (unlikely(!skb)) {
927 #ifdef CONFIG_MAC80211_HT_DEBUG
928 if (net_ratelimit())
929 printk(KERN_WARNING "%s: Not enough memory, "
930 "dropping start BA session", skb->dev->name);
931 #endif
932 return;
933 }
934 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
935 memcpy(&ra_tid->ra, ra, ETH_ALEN);
936 ra_tid->tid = tid;
937
938 skb->pkt_type = IEEE80211_ADDBA_MSG;
939 skb_queue_tail(&local->skb_queue, skb);
940 tasklet_schedule(&local->tasklet);
941 }
942 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
943
944 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
945 const u8 *ra, u16 tid)
946 {
947 struct ieee80211_local *local = hw_to_local(hw);
948 struct ieee80211_ra_tid *ra_tid;
949 struct sk_buff *skb = dev_alloc_skb(0);
950
951 if (unlikely(!skb)) {
952 #ifdef CONFIG_MAC80211_HT_DEBUG
953 if (net_ratelimit())
954 printk(KERN_WARNING "%s: Not enough memory, "
955 "dropping stop BA session", skb->dev->name);
956 #endif
957 return;
958 }
959 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
960 memcpy(&ra_tid->ra, ra, ETH_ALEN);
961 ra_tid->tid = tid;
962
963 skb->pkt_type = IEEE80211_DELBA_MSG;
964 skb_queue_tail(&local->skb_queue, skb);
965 tasklet_schedule(&local->tasklet);
966 }
967 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
968
969 static void ieee80211_set_multicast_list(struct net_device *dev)
970 {
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
973 int allmulti, promisc, sdata_allmulti, sdata_promisc;
974
975 allmulti = !!(dev->flags & IFF_ALLMULTI);
976 promisc = !!(dev->flags & IFF_PROMISC);
977 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
978 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
979
980 if (allmulti != sdata_allmulti) {
981 if (dev->flags & IFF_ALLMULTI)
982 atomic_inc(&local->iff_allmultis);
983 else
984 atomic_dec(&local->iff_allmultis);
985 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
986 }
987
988 if (promisc != sdata_promisc) {
989 if (dev->flags & IFF_PROMISC)
990 atomic_inc(&local->iff_promiscs);
991 else
992 atomic_dec(&local->iff_promiscs);
993 sdata->flags ^= IEEE80211_SDATA_PROMISC;
994 }
995
996 dev_mc_sync(local->mdev, dev);
997 }
998
999 static const struct header_ops ieee80211_header_ops = {
1000 .create = eth_header,
1001 .parse = header_parse_80211,
1002 .rebuild = eth_rebuild_header,
1003 .cache = eth_header_cache,
1004 .cache_update = eth_header_cache_update,
1005 };
1006
1007 void ieee80211_if_setup(struct net_device *dev)
1008 {
1009 ether_setup(dev);
1010 dev->hard_start_xmit = ieee80211_subif_start_xmit;
1011 dev->wireless_handlers = &ieee80211_iw_handler_def;
1012 dev->set_multicast_list = ieee80211_set_multicast_list;
1013 dev->change_mtu = ieee80211_change_mtu;
1014 dev->open = ieee80211_open;
1015 dev->stop = ieee80211_stop;
1016 dev->destructor = free_netdev;
1017 /* we will validate the address ourselves in ->open */
1018 dev->validate_addr = NULL;
1019 }
1020
1021 /* everything else */
1022
1023 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
1024 {
1025 struct ieee80211_local *local = sdata->local;
1026 struct ieee80211_if_conf conf;
1027
1028 if (WARN_ON(!netif_running(sdata->dev)))
1029 return 0;
1030
1031 if (!local->ops->config_interface)
1032 return 0;
1033
1034 memset(&conf, 0, sizeof(conf));
1035 conf.changed = changed;
1036
1037 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1038 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1039 conf.bssid = sdata->u.sta.bssid;
1040 conf.ssid = sdata->u.sta.ssid;
1041 conf.ssid_len = sdata->u.sta.ssid_len;
1042 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1043 conf.bssid = sdata->dev->dev_addr;
1044 conf.ssid = sdata->u.ap.ssid;
1045 conf.ssid_len = sdata->u.ap.ssid_len;
1046 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1047 u8 zero[ETH_ALEN] = { 0 };
1048 conf.bssid = zero;
1049 conf.ssid = zero;
1050 conf.ssid_len = 0;
1051 } else {
1052 WARN_ON(1);
1053 return -EINVAL;
1054 }
1055
1056 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1057 return -EINVAL;
1058
1059 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1060 return -EINVAL;
1061
1062 return local->ops->config_interface(local_to_hw(local),
1063 &sdata->vif, &conf);
1064 }
1065
1066 int ieee80211_hw_config(struct ieee80211_local *local)
1067 {
1068 struct ieee80211_channel *chan;
1069 int ret = 0;
1070
1071 if (local->sta_sw_scanning)
1072 chan = local->scan_channel;
1073 else
1074 chan = local->oper_channel;
1075
1076 local->hw.conf.channel = chan;
1077
1078 if (!local->hw.conf.power_level)
1079 local->hw.conf.power_level = chan->max_power;
1080 else
1081 local->hw.conf.power_level = min(chan->max_power,
1082 local->hw.conf.power_level);
1083
1084 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1085
1086 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1087 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1088 wiphy_name(local->hw.wiphy), chan->center_freq);
1089 #endif
1090
1091 if (local->open_count)
1092 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1093
1094 return ret;
1095 }
1096
1097 /**
1098 * ieee80211_handle_ht should be used only after legacy configuration
1099 * has been determined namely band, as ht configuration depends upon
1100 * the hardware's HT abilities for a _specific_ band.
1101 */
1102 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1103 struct ieee80211_ht_info *req_ht_cap,
1104 struct ieee80211_ht_bss_info *req_bss_cap)
1105 {
1106 struct ieee80211_conf *conf = &local->hw.conf;
1107 struct ieee80211_supported_band *sband;
1108 struct ieee80211_ht_info ht_conf;
1109 struct ieee80211_ht_bss_info ht_bss_conf;
1110 u32 changed = 0;
1111 int i;
1112 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1113 u8 tx_mcs_set_cap;
1114
1115 sband = local->hw.wiphy->bands[conf->channel->band];
1116
1117 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1118 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1119
1120 /* HT is not supported */
1121 if (!sband->ht_info.ht_supported) {
1122 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1123 goto out;
1124 }
1125
1126 /* disable HT */
1127 if (!enable_ht) {
1128 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1129 changed |= BSS_CHANGED_HT;
1130 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1131 conf->ht_conf.ht_supported = 0;
1132 goto out;
1133 }
1134
1135
1136 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1137 changed |= BSS_CHANGED_HT;
1138
1139 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1140 ht_conf.ht_supported = 1;
1141
1142 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1143 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1144 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1145 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1146 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1147 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1148
1149 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1150 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1151
1152 /* Bits 96-100 */
1153 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1154
1155 /* configure suppoerted Tx MCS according to requested MCS
1156 * (based in most cases on Rx capabilities of peer) and self
1157 * Tx MCS capabilities (as defined by low level driver HW
1158 * Tx capabilities) */
1159 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1160 goto check_changed;
1161
1162 /* Counting from 0 therfore + 1 */
1163 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1164 max_tx_streams = ((tx_mcs_set_cap &
1165 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1166
1167 for (i = 0; i < max_tx_streams; i++)
1168 ht_conf.supp_mcs_set[i] =
1169 sband->ht_info.supp_mcs_set[i] &
1170 req_ht_cap->supp_mcs_set[i];
1171
1172 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1173 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1174 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1175 ht_conf.supp_mcs_set[i] =
1176 sband->ht_info.supp_mcs_set[i] &
1177 req_ht_cap->supp_mcs_set[i];
1178
1179 check_changed:
1180 /* if bss configuration changed store the new one */
1181 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1182 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1183 changed |= BSS_CHANGED_HT;
1184 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1185 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1186 }
1187 out:
1188 return changed;
1189 }
1190
1191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1192 u32 changed)
1193 {
1194 struct ieee80211_local *local = sdata->local;
1195
1196 if (!changed)
1197 return;
1198
1199 if (local->ops->bss_info_changed)
1200 local->ops->bss_info_changed(local_to_hw(local),
1201 &sdata->vif,
1202 &sdata->bss_conf,
1203 changed);
1204 }
1205
1206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
1207 {
1208 sdata->bss_conf.use_cts_prot = 0;
1209 sdata->bss_conf.use_short_preamble = 0;
1210 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1211 }
1212
1213 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1214 struct sk_buff *skb)
1215 {
1216 struct ieee80211_local *local = hw_to_local(hw);
1217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1218 int tmp;
1219
1220 skb->dev = local->mdev;
1221 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1222 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1223 &local->skb_queue : &local->skb_queue_unreliable, skb);
1224 tmp = skb_queue_len(&local->skb_queue) +
1225 skb_queue_len(&local->skb_queue_unreliable);
1226 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1227 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1228 dev_kfree_skb_irq(skb);
1229 tmp--;
1230 I802_DEBUG_INC(local->tx_status_drop);
1231 }
1232 tasklet_schedule(&local->tasklet);
1233 }
1234 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1235
1236 static void ieee80211_tasklet_handler(unsigned long data)
1237 {
1238 struct ieee80211_local *local = (struct ieee80211_local *) data;
1239 struct sk_buff *skb;
1240 struct ieee80211_rx_status rx_status;
1241 struct ieee80211_ra_tid *ra_tid;
1242
1243 while ((skb = skb_dequeue(&local->skb_queue)) ||
1244 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1245 switch (skb->pkt_type) {
1246 case IEEE80211_RX_MSG:
1247 /* status is in skb->cb */
1248 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1249 /* Clear skb->pkt_type in order to not confuse kernel
1250 * netstack. */
1251 skb->pkt_type = 0;
1252 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1253 break;
1254 case IEEE80211_TX_STATUS_MSG:
1255 skb->pkt_type = 0;
1256 ieee80211_tx_status(local_to_hw(local), skb);
1257 break;
1258 case IEEE80211_DELBA_MSG:
1259 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1260 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1261 ra_tid->ra, ra_tid->tid);
1262 dev_kfree_skb(skb);
1263 break;
1264 case IEEE80211_ADDBA_MSG:
1265 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1266 ieee80211_start_tx_ba_cb(local_to_hw(local),
1267 ra_tid->ra, ra_tid->tid);
1268 dev_kfree_skb(skb);
1269 break ;
1270 default:
1271 WARN_ON(1);
1272 dev_kfree_skb(skb);
1273 break;
1274 }
1275 }
1276 }
1277
1278 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1279 * make a prepared TX frame (one that has been given to hw) to look like brand
1280 * new IEEE 802.11 frame that is ready to go through TX processing again.
1281 */
1282 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1283 struct ieee80211_key *key,
1284 struct sk_buff *skb)
1285 {
1286 unsigned int hdrlen, iv_len, mic_len;
1287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1288
1289 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1290
1291 if (!key)
1292 goto no_key;
1293
1294 switch (key->conf.alg) {
1295 case ALG_WEP:
1296 iv_len = WEP_IV_LEN;
1297 mic_len = WEP_ICV_LEN;
1298 break;
1299 case ALG_TKIP:
1300 iv_len = TKIP_IV_LEN;
1301 mic_len = TKIP_ICV_LEN;
1302 break;
1303 case ALG_CCMP:
1304 iv_len = CCMP_HDR_LEN;
1305 mic_len = CCMP_MIC_LEN;
1306 break;
1307 default:
1308 goto no_key;
1309 }
1310
1311 if (skb->len >= hdrlen + mic_len &&
1312 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1313 skb_trim(skb, skb->len - mic_len);
1314 if (skb->len >= hdrlen + iv_len) {
1315 memmove(skb->data + iv_len, skb->data, hdrlen);
1316 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
1317 }
1318
1319 no_key:
1320 if (ieee80211_is_data_qos(hdr->frame_control)) {
1321 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1322 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
1323 hdrlen - IEEE80211_QOS_CTL_LEN);
1324 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
1325 }
1326 }
1327
1328 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1329 struct sta_info *sta,
1330 struct sk_buff *skb)
1331 {
1332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1333
1334 sta->tx_filtered_count++;
1335
1336 /*
1337 * Clear the TX filter mask for this STA when sending the next
1338 * packet. If the STA went to power save mode, this will happen
1339 * when it wakes up for the next time.
1340 */
1341 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1342
1343 /*
1344 * This code races in the following way:
1345 *
1346 * (1) STA sends frame indicating it will go to sleep and does so
1347 * (2) hardware/firmware adds STA to filter list, passes frame up
1348 * (3) hardware/firmware processes TX fifo and suppresses a frame
1349 * (4) we get TX status before having processed the frame and
1350 * knowing that the STA has gone to sleep.
1351 *
1352 * This is actually quite unlikely even when both those events are
1353 * processed from interrupts coming in quickly after one another or
1354 * even at the same time because we queue both TX status events and
1355 * RX frames to be processed by a tasklet and process them in the
1356 * same order that they were received or TX status last. Hence, there
1357 * is no race as long as the frame RX is processed before the next TX
1358 * status, which drivers can ensure, see below.
1359 *
1360 * Note that this can only happen if the hardware or firmware can
1361 * actually add STAs to the filter list, if this is done by the
1362 * driver in response to set_tim() (which will only reduce the race
1363 * this whole filtering tries to solve, not completely solve it)
1364 * this situation cannot happen.
1365 *
1366 * To completely solve this race drivers need to make sure that they
1367 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1368 * functions and
1369 * (b) always process RX events before TX status events if ordering
1370 * can be unknown, for example with different interrupt status
1371 * bits.
1372 */
1373 if (test_sta_flags(sta, WLAN_STA_PS) &&
1374 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1375 ieee80211_remove_tx_extra(local, sta->key, skb);
1376 skb_queue_tail(&sta->tx_filtered, skb);
1377 return;
1378 }
1379
1380 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1381 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1382 /* Software retry the packet once */
1383 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1384 ieee80211_remove_tx_extra(local, sta->key, skb);
1385 dev_queue_xmit(skb);
1386 return;
1387 }
1388
1389 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1390 if (net_ratelimit())
1391 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1392 "queue_len=%d PS=%d @%lu\n",
1393 wiphy_name(local->hw.wiphy),
1394 skb_queue_len(&sta->tx_filtered),
1395 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1396 #endif
1397 dev_kfree_skb(skb);
1398 }
1399
1400 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1401 {
1402 struct sk_buff *skb2;
1403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1404 struct ieee80211_local *local = hw_to_local(hw);
1405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1406 u16 frag, type;
1407 __le16 fc;
1408 struct ieee80211_tx_status_rtap_hdr *rthdr;
1409 struct ieee80211_sub_if_data *sdata;
1410 struct net_device *prev_dev = NULL;
1411 struct sta_info *sta;
1412
1413 rcu_read_lock();
1414
1415 if (info->status.excessive_retries) {
1416 sta = sta_info_get(local, hdr->addr1);
1417 if (sta) {
1418 if (test_sta_flags(sta, WLAN_STA_PS)) {
1419 /*
1420 * The STA is in power save mode, so assume
1421 * that this TX packet failed because of that.
1422 */
1423 ieee80211_handle_filtered_frame(local, sta, skb);
1424 rcu_read_unlock();
1425 return;
1426 }
1427 }
1428 }
1429
1430 fc = hdr->frame_control;
1431
1432 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1433 (ieee80211_is_data_qos(fc))) {
1434 u16 tid, ssn;
1435 u8 *qc;
1436 sta = sta_info_get(local, hdr->addr1);
1437 if (sta) {
1438 qc = ieee80211_get_qos_ctl(hdr);
1439 tid = qc[0] & 0xf;
1440 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1441 & IEEE80211_SCTL_SEQ);
1442 ieee80211_send_bar(sta->sdata, hdr->addr1,
1443 tid, ssn);
1444 }
1445 }
1446
1447 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1448 sta = sta_info_get(local, hdr->addr1);
1449 if (sta) {
1450 ieee80211_handle_filtered_frame(local, sta, skb);
1451 rcu_read_unlock();
1452 return;
1453 }
1454 } else
1455 rate_control_tx_status(local->mdev, skb);
1456
1457 rcu_read_unlock();
1458
1459 ieee80211_led_tx(local, 0);
1460
1461 /* SNMP counters
1462 * Fragments are passed to low-level drivers as separate skbs, so these
1463 * are actually fragments, not frames. Update frame counters only for
1464 * the first fragment of the frame. */
1465
1466 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1467 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1468
1469 if (info->flags & IEEE80211_TX_STAT_ACK) {
1470 if (frag == 0) {
1471 local->dot11TransmittedFrameCount++;
1472 if (is_multicast_ether_addr(hdr->addr1))
1473 local->dot11MulticastTransmittedFrameCount++;
1474 if (info->status.retry_count > 0)
1475 local->dot11RetryCount++;
1476 if (info->status.retry_count > 1)
1477 local->dot11MultipleRetryCount++;
1478 }
1479
1480 /* This counter shall be incremented for an acknowledged MPDU
1481 * with an individual address in the address 1 field or an MPDU
1482 * with a multicast address in the address 1 field of type Data
1483 * or Management. */
1484 if (!is_multicast_ether_addr(hdr->addr1) ||
1485 type == IEEE80211_FTYPE_DATA ||
1486 type == IEEE80211_FTYPE_MGMT)
1487 local->dot11TransmittedFragmentCount++;
1488 } else {
1489 if (frag == 0)
1490 local->dot11FailedCount++;
1491 }
1492
1493 /* this was a transmitted frame, but now we want to reuse it */
1494 skb_orphan(skb);
1495
1496 /*
1497 * This is a bit racy but we can avoid a lot of work
1498 * with this test...
1499 */
1500 if (!local->monitors && !local->cooked_mntrs) {
1501 dev_kfree_skb(skb);
1502 return;
1503 }
1504
1505 /* send frame to monitor interfaces now */
1506
1507 if (skb_headroom(skb) < sizeof(*rthdr)) {
1508 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1509 dev_kfree_skb(skb);
1510 return;
1511 }
1512
1513 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1514 skb_push(skb, sizeof(*rthdr));
1515
1516 memset(rthdr, 0, sizeof(*rthdr));
1517 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1518 rthdr->hdr.it_present =
1519 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1520 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1521
1522 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1523 !is_multicast_ether_addr(hdr->addr1))
1524 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1525
1526 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1527 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1528 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1529 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1530 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1531
1532 rthdr->data_retries = info->status.retry_count;
1533
1534 /* XXX: is this sufficient for BPF? */
1535 skb_set_mac_header(skb, 0);
1536 skb->ip_summed = CHECKSUM_UNNECESSARY;
1537 skb->pkt_type = PACKET_OTHERHOST;
1538 skb->protocol = htons(ETH_P_802_2);
1539 memset(skb->cb, 0, sizeof(skb->cb));
1540
1541 rcu_read_lock();
1542 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1543 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1544 if (!netif_running(sdata->dev))
1545 continue;
1546
1547 if (prev_dev) {
1548 skb2 = skb_clone(skb, GFP_ATOMIC);
1549 if (skb2) {
1550 skb2->dev = prev_dev;
1551 netif_rx(skb2);
1552 }
1553 }
1554
1555 prev_dev = sdata->dev;
1556 }
1557 }
1558 if (prev_dev) {
1559 skb->dev = prev_dev;
1560 netif_rx(skb);
1561 skb = NULL;
1562 }
1563 rcu_read_unlock();
1564 dev_kfree_skb(skb);
1565 }
1566 EXPORT_SYMBOL(ieee80211_tx_status);
1567
1568 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1569 const struct ieee80211_ops *ops)
1570 {
1571 struct ieee80211_local *local;
1572 int priv_size;
1573 struct wiphy *wiphy;
1574
1575 /* Ensure 32-byte alignment of our private data and hw private data.
1576 * We use the wiphy priv data for both our ieee80211_local and for
1577 * the driver's private data
1578 *
1579 * In memory it'll be like this:
1580 *
1581 * +-------------------------+
1582 * | struct wiphy |
1583 * +-------------------------+
1584 * | struct ieee80211_local |
1585 * +-------------------------+
1586 * | driver's private data |
1587 * +-------------------------+
1588 *
1589 */
1590 priv_size = ((sizeof(struct ieee80211_local) +
1591 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1592 priv_data_len;
1593
1594 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1595
1596 if (!wiphy)
1597 return NULL;
1598
1599 wiphy->privid = mac80211_wiphy_privid;
1600
1601 local = wiphy_priv(wiphy);
1602 local->hw.wiphy = wiphy;
1603
1604 local->hw.priv = (char *)local +
1605 ((sizeof(struct ieee80211_local) +
1606 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1607
1608 BUG_ON(!ops->tx);
1609 BUG_ON(!ops->start);
1610 BUG_ON(!ops->stop);
1611 BUG_ON(!ops->config);
1612 BUG_ON(!ops->add_interface);
1613 BUG_ON(!ops->remove_interface);
1614 BUG_ON(!ops->configure_filter);
1615 local->ops = ops;
1616
1617 local->hw.queues = 1; /* default */
1618
1619 local->bridge_packets = 1;
1620
1621 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1622 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1623 local->short_retry_limit = 7;
1624 local->long_retry_limit = 4;
1625 local->hw.conf.radio_enabled = 1;
1626
1627 INIT_LIST_HEAD(&local->interfaces);
1628
1629 spin_lock_init(&local->key_lock);
1630
1631 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1632
1633 sta_info_init(local);
1634
1635 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1636 (unsigned long)local);
1637 tasklet_disable(&local->tx_pending_tasklet);
1638
1639 tasklet_init(&local->tasklet,
1640 ieee80211_tasklet_handler,
1641 (unsigned long) local);
1642 tasklet_disable(&local->tasklet);
1643
1644 skb_queue_head_init(&local->skb_queue);
1645 skb_queue_head_init(&local->skb_queue_unreliable);
1646
1647 return local_to_hw(local);
1648 }
1649 EXPORT_SYMBOL(ieee80211_alloc_hw);
1650
1651 int ieee80211_register_hw(struct ieee80211_hw *hw)
1652 {
1653 struct ieee80211_local *local = hw_to_local(hw);
1654 const char *name;
1655 int result;
1656 enum ieee80211_band band;
1657 struct net_device *mdev;
1658 struct wireless_dev *mwdev;
1659
1660 /*
1661 * generic code guarantees at least one band,
1662 * set this very early because much code assumes
1663 * that hw.conf.channel is assigned
1664 */
1665 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1666 struct ieee80211_supported_band *sband;
1667
1668 sband = local->hw.wiphy->bands[band];
1669 if (sband) {
1670 /* init channel we're on */
1671 local->hw.conf.channel =
1672 local->oper_channel =
1673 local->scan_channel = &sband->channels[0];
1674 break;
1675 }
1676 }
1677
1678 /* if low-level driver supports AP, we also support VLAN */
1679 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
1680 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1681
1682 /* mac80211 always supports monitor */
1683 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1684
1685 result = wiphy_register(local->hw.wiphy);
1686 if (result < 0)
1687 return result;
1688
1689 /*
1690 * We use the number of queues for feature tests (QoS, HT) internally
1691 * so restrict them appropriately.
1692 */
1693 if (hw->queues > IEEE80211_MAX_QUEUES)
1694 hw->queues = IEEE80211_MAX_QUEUES;
1695 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1696 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1697 if (hw->queues < 4)
1698 hw->ampdu_queues = 0;
1699
1700 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1701 "wmaster%d", ether_setup,
1702 ieee80211_num_queues(hw));
1703 if (!mdev)
1704 goto fail_mdev_alloc;
1705
1706 mwdev = netdev_priv(mdev);
1707 mdev->ieee80211_ptr = mwdev;
1708 mwdev->wiphy = local->hw.wiphy;
1709
1710 local->mdev = mdev;
1711
1712 ieee80211_rx_bss_list_init(local);
1713
1714 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1715 mdev->open = ieee80211_master_open;
1716 mdev->stop = ieee80211_master_stop;
1717 mdev->type = ARPHRD_IEEE80211;
1718 mdev->header_ops = &ieee80211_header_ops;
1719 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1720
1721 name = wiphy_dev(local->hw.wiphy)->driver->name;
1722 local->hw.workqueue = create_freezeable_workqueue(name);
1723 if (!local->hw.workqueue) {
1724 result = -ENOMEM;
1725 goto fail_workqueue;
1726 }
1727
1728 /*
1729 * The hardware needs headroom for sending the frame,
1730 * and we need some headroom for passing the frame to monitor
1731 * interfaces, but never both at the same time.
1732 */
1733 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1734 sizeof(struct ieee80211_tx_status_rtap_hdr));
1735
1736 debugfs_hw_add(local);
1737
1738 if (local->hw.conf.beacon_int < 10)
1739 local->hw.conf.beacon_int = 100;
1740
1741 if (local->hw.max_listen_interval == 0)
1742 local->hw.max_listen_interval = 1;
1743
1744 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1745
1746 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1747 IEEE80211_HW_SIGNAL_DB |
1748 IEEE80211_HW_SIGNAL_DBM) ?
1749 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1750 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1751 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1752 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1753 local->wstats_flags |= IW_QUAL_DBM;
1754
1755 result = sta_info_start(local);
1756 if (result < 0)
1757 goto fail_sta_info;
1758
1759 rtnl_lock();
1760 result = dev_alloc_name(local->mdev, local->mdev->name);
1761 if (result < 0)
1762 goto fail_dev;
1763
1764 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1765 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1766
1767 result = register_netdevice(local->mdev);
1768 if (result < 0)
1769 goto fail_dev;
1770
1771 result = ieee80211_init_rate_ctrl_alg(local,
1772 hw->rate_control_algorithm);
1773 if (result < 0) {
1774 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1775 "algorithm\n", wiphy_name(local->hw.wiphy));
1776 goto fail_rate;
1777 }
1778
1779 result = ieee80211_wep_init(local);
1780
1781 if (result < 0) {
1782 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1783 wiphy_name(local->hw.wiphy), result);
1784 goto fail_wep;
1785 }
1786
1787 local->mdev->select_queue = ieee80211_select_queue;
1788
1789 /* add one default STA interface */
1790 result = ieee80211_if_add(local, "wlan%d", NULL,
1791 IEEE80211_IF_TYPE_STA, NULL);
1792 if (result)
1793 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1794 wiphy_name(local->hw.wiphy));
1795
1796 rtnl_unlock();
1797
1798 ieee80211_led_init(local);
1799
1800 return 0;
1801
1802 fail_wep:
1803 rate_control_deinitialize(local);
1804 fail_rate:
1805 unregister_netdevice(local->mdev);
1806 local->mdev = NULL;
1807 fail_dev:
1808 rtnl_unlock();
1809 sta_info_stop(local);
1810 fail_sta_info:
1811 debugfs_hw_del(local);
1812 destroy_workqueue(local->hw.workqueue);
1813 fail_workqueue:
1814 if (local->mdev)
1815 free_netdev(local->mdev);
1816 fail_mdev_alloc:
1817 wiphy_unregister(local->hw.wiphy);
1818 return result;
1819 }
1820 EXPORT_SYMBOL(ieee80211_register_hw);
1821
1822 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1823 {
1824 struct ieee80211_local *local = hw_to_local(hw);
1825
1826 tasklet_kill(&local->tx_pending_tasklet);
1827 tasklet_kill(&local->tasklet);
1828
1829 rtnl_lock();
1830
1831 /*
1832 * At this point, interface list manipulations are fine
1833 * because the driver cannot be handing us frames any
1834 * more and the tasklet is killed.
1835 */
1836
1837 /* First, we remove all virtual interfaces. */
1838 ieee80211_remove_interfaces(local);
1839
1840 /* then, finally, remove the master interface */
1841 unregister_netdevice(local->mdev);
1842
1843 rtnl_unlock();
1844
1845 ieee80211_rx_bss_list_deinit(local);
1846 ieee80211_clear_tx_pending(local);
1847 sta_info_stop(local);
1848 rate_control_deinitialize(local);
1849 debugfs_hw_del(local);
1850
1851 if (skb_queue_len(&local->skb_queue)
1852 || skb_queue_len(&local->skb_queue_unreliable))
1853 printk(KERN_WARNING "%s: skb_queue not empty\n",
1854 wiphy_name(local->hw.wiphy));
1855 skb_queue_purge(&local->skb_queue);
1856 skb_queue_purge(&local->skb_queue_unreliable);
1857
1858 destroy_workqueue(local->hw.workqueue);
1859 wiphy_unregister(local->hw.wiphy);
1860 ieee80211_wep_free(local);
1861 ieee80211_led_exit(local);
1862 free_netdev(local->mdev);
1863 }
1864 EXPORT_SYMBOL(ieee80211_unregister_hw);
1865
1866 void ieee80211_free_hw(struct ieee80211_hw *hw)
1867 {
1868 struct ieee80211_local *local = hw_to_local(hw);
1869
1870 wiphy_free(local->hw.wiphy);
1871 }
1872 EXPORT_SYMBOL(ieee80211_free_hw);
1873
1874 static int __init ieee80211_init(void)
1875 {
1876 struct sk_buff *skb;
1877 int ret;
1878
1879 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1880 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1881 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1882
1883 ret = rc80211_pid_init();
1884 if (ret)
1885 return ret;
1886
1887 ieee80211_debugfs_netdev_init();
1888
1889 return 0;
1890 }
1891
1892 static void __exit ieee80211_exit(void)
1893 {
1894 rc80211_pid_exit();
1895
1896 /*
1897 * For key todo, it'll be empty by now but the work
1898 * might still be scheduled.
1899 */
1900 flush_scheduled_work();
1901
1902 if (mesh_allocated)
1903 ieee80211s_stop();
1904
1905 ieee80211_debugfs_netdev_exit();
1906 }
1907
1908
1909 subsys_initcall(ieee80211_init);
1910 module_exit(ieee80211_exit);
1911
1912 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1913 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree