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replace net_device arguments with ieee80211_{local,sub_if_data} as appropriate
[deliverable/linux.git] / net / mac80211 / main.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_i.h"
28 #include "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_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 = 0;
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 if (local->ops->ampdu_action)
682 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
683 ra, tid, &start_seq_num);
684
685 if (ret) {
686 /* No need to requeue the packets in the agg queue, since we
687 * held the tx lock: no packet could be enqueued to the newly
688 * allocated queue */
689 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
690 #ifdef CONFIG_MAC80211_HT_DEBUG
691 printk(KERN_DEBUG "BA request denied - HW unavailable for"
692 " tid %d\n", tid);
693 #endif /* CONFIG_MAC80211_HT_DEBUG */
694 *state = HT_AGG_STATE_IDLE;
695 goto err_unlock_queue;
696 }
697
698 /* Will put all the packets in the new SW queue */
699 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
700 spin_unlock_bh(&sta->lock);
701
702 /* send an addBA request */
703 sta->ampdu_mlme.dialog_token_allocator++;
704 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
705 sta->ampdu_mlme.dialog_token_allocator;
706 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
707
708
709 ieee80211_send_addba_request(sta->sdata, ra, tid,
710 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
711 sta->ampdu_mlme.tid_tx[tid]->ssn,
712 0x40, 5000);
713 /* activate the timer for the recipient's addBA response */
714 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
715 jiffies + ADDBA_RESP_INTERVAL;
716 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
717 #ifdef CONFIG_MAC80211_HT_DEBUG
718 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
719 #endif
720 goto exit;
721
722 err_unlock_queue:
723 kfree(sta->ampdu_mlme.tid_tx[tid]);
724 sta->ampdu_mlme.tid_tx[tid] = NULL;
725 ret = -EBUSY;
726 err_unlock_sta:
727 spin_unlock_bh(&sta->lock);
728 exit:
729 rcu_read_unlock();
730 return ret;
731 }
732 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
733
734 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
735 u8 *ra, u16 tid,
736 enum ieee80211_back_parties initiator)
737 {
738 struct ieee80211_local *local = hw_to_local(hw);
739 struct sta_info *sta;
740 u8 *state;
741 int ret = 0;
742 DECLARE_MAC_BUF(mac);
743
744 if (tid >= STA_TID_NUM)
745 return -EINVAL;
746
747 rcu_read_lock();
748 sta = sta_info_get(local, ra);
749 if (!sta) {
750 rcu_read_unlock();
751 return -ENOENT;
752 }
753
754 /* check if the TID is in aggregation */
755 state = &sta->ampdu_mlme.tid_state_tx[tid];
756 spin_lock_bh(&sta->lock);
757
758 if (*state != HT_AGG_STATE_OPERATIONAL) {
759 ret = -ENOENT;
760 goto stop_BA_exit;
761 }
762
763 #ifdef CONFIG_MAC80211_HT_DEBUG
764 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
765 print_mac(mac, ra), tid);
766 #endif /* CONFIG_MAC80211_HT_DEBUG */
767
768 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
769
770 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
771 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
772
773 if (local->ops->ampdu_action)
774 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
775 ra, tid, NULL);
776
777 /* case HW denied going back to legacy */
778 if (ret) {
779 WARN_ON(ret != -EBUSY);
780 *state = HT_AGG_STATE_OPERATIONAL;
781 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
782 goto stop_BA_exit;
783 }
784
785 stop_BA_exit:
786 spin_unlock_bh(&sta->lock);
787 rcu_read_unlock();
788 return ret;
789 }
790 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
791
792 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
793 {
794 struct ieee80211_local *local = hw_to_local(hw);
795 struct sta_info *sta;
796 u8 *state;
797 DECLARE_MAC_BUF(mac);
798
799 if (tid >= STA_TID_NUM) {
800 #ifdef CONFIG_MAC80211_HT_DEBUG
801 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
802 tid, STA_TID_NUM);
803 #endif
804 return;
805 }
806
807 rcu_read_lock();
808 sta = sta_info_get(local, ra);
809 if (!sta) {
810 rcu_read_unlock();
811 #ifdef CONFIG_MAC80211_HT_DEBUG
812 printk(KERN_DEBUG "Could not find station: %s\n",
813 print_mac(mac, ra));
814 #endif
815 return;
816 }
817
818 state = &sta->ampdu_mlme.tid_state_tx[tid];
819 spin_lock_bh(&sta->lock);
820
821 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
822 #ifdef CONFIG_MAC80211_HT_DEBUG
823 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
824 *state);
825 #endif
826 spin_unlock_bh(&sta->lock);
827 rcu_read_unlock();
828 return;
829 }
830
831 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
832
833 *state |= HT_ADDBA_DRV_READY_MSK;
834
835 if (*state == HT_AGG_STATE_OPERATIONAL) {
836 #ifdef CONFIG_MAC80211_HT_DEBUG
837 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
838 #endif
839 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
840 }
841 spin_unlock_bh(&sta->lock);
842 rcu_read_unlock();
843 }
844 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
845
846 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
847 {
848 struct ieee80211_local *local = hw_to_local(hw);
849 struct sta_info *sta;
850 u8 *state;
851 int agg_queue;
852 DECLARE_MAC_BUF(mac);
853
854 if (tid >= STA_TID_NUM) {
855 #ifdef CONFIG_MAC80211_HT_DEBUG
856 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
857 tid, STA_TID_NUM);
858 #endif
859 return;
860 }
861
862 #ifdef CONFIG_MAC80211_HT_DEBUG
863 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
864 print_mac(mac, ra), tid);
865 #endif /* CONFIG_MAC80211_HT_DEBUG */
866
867 rcu_read_lock();
868 sta = sta_info_get(local, ra);
869 if (!sta) {
870 #ifdef CONFIG_MAC80211_HT_DEBUG
871 printk(KERN_DEBUG "Could not find station: %s\n",
872 print_mac(mac, ra));
873 #endif
874 rcu_read_unlock();
875 return;
876 }
877 state = &sta->ampdu_mlme.tid_state_tx[tid];
878
879 /* NOTE: no need to use sta->lock in this state check, as
880 * ieee80211_stop_tx_ba_session will let only one stop call to
881 * pass through per sta/tid
882 */
883 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
884 #ifdef CONFIG_MAC80211_HT_DEBUG
885 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
886 #endif
887 rcu_read_unlock();
888 return;
889 }
890
891 if (*state & HT_AGG_STATE_INITIATOR_MSK)
892 ieee80211_send_delba(sta->sdata, ra, tid,
893 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
894
895 agg_queue = sta->tid_to_tx_q[tid];
896
897 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
898
899 /* We just requeued the all the frames that were in the
900 * removed queue, and since we might miss a softirq we do
901 * netif_schedule_queue. ieee80211_wake_queue is not used
902 * here as this queue is not necessarily stopped
903 */
904 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
905 spin_lock_bh(&sta->lock);
906 *state = HT_AGG_STATE_IDLE;
907 sta->ampdu_mlme.addba_req_num[tid] = 0;
908 kfree(sta->ampdu_mlme.tid_tx[tid]);
909 sta->ampdu_mlme.tid_tx[tid] = NULL;
910 spin_unlock_bh(&sta->lock);
911
912 rcu_read_unlock();
913 }
914 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
915
916 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
917 const u8 *ra, u16 tid)
918 {
919 struct ieee80211_local *local = hw_to_local(hw);
920 struct ieee80211_ra_tid *ra_tid;
921 struct sk_buff *skb = dev_alloc_skb(0);
922
923 if (unlikely(!skb)) {
924 #ifdef CONFIG_MAC80211_HT_DEBUG
925 if (net_ratelimit())
926 printk(KERN_WARNING "%s: Not enough memory, "
927 "dropping start BA session", skb->dev->name);
928 #endif
929 return;
930 }
931 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
932 memcpy(&ra_tid->ra, ra, ETH_ALEN);
933 ra_tid->tid = tid;
934
935 skb->pkt_type = IEEE80211_ADDBA_MSG;
936 skb_queue_tail(&local->skb_queue, skb);
937 tasklet_schedule(&local->tasklet);
938 }
939 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
940
941 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
942 const u8 *ra, u16 tid)
943 {
944 struct ieee80211_local *local = hw_to_local(hw);
945 struct ieee80211_ra_tid *ra_tid;
946 struct sk_buff *skb = dev_alloc_skb(0);
947
948 if (unlikely(!skb)) {
949 #ifdef CONFIG_MAC80211_HT_DEBUG
950 if (net_ratelimit())
951 printk(KERN_WARNING "%s: Not enough memory, "
952 "dropping stop BA session", skb->dev->name);
953 #endif
954 return;
955 }
956 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
957 memcpy(&ra_tid->ra, ra, ETH_ALEN);
958 ra_tid->tid = tid;
959
960 skb->pkt_type = IEEE80211_DELBA_MSG;
961 skb_queue_tail(&local->skb_queue, skb);
962 tasklet_schedule(&local->tasklet);
963 }
964 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
965
966 static void ieee80211_set_multicast_list(struct net_device *dev)
967 {
968 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
969 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
970 int allmulti, promisc, sdata_allmulti, sdata_promisc;
971
972 allmulti = !!(dev->flags & IFF_ALLMULTI);
973 promisc = !!(dev->flags & IFF_PROMISC);
974 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
975 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
976
977 if (allmulti != sdata_allmulti) {
978 if (dev->flags & IFF_ALLMULTI)
979 atomic_inc(&local->iff_allmultis);
980 else
981 atomic_dec(&local->iff_allmultis);
982 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
983 }
984
985 if (promisc != sdata_promisc) {
986 if (dev->flags & IFF_PROMISC)
987 atomic_inc(&local->iff_promiscs);
988 else
989 atomic_dec(&local->iff_promiscs);
990 sdata->flags ^= IEEE80211_SDATA_PROMISC;
991 }
992
993 dev_mc_sync(local->mdev, dev);
994 }
995
996 static const struct header_ops ieee80211_header_ops = {
997 .create = eth_header,
998 .parse = header_parse_80211,
999 .rebuild = eth_rebuild_header,
1000 .cache = eth_header_cache,
1001 .cache_update = eth_header_cache_update,
1002 };
1003
1004 void ieee80211_if_setup(struct net_device *dev)
1005 {
1006 ether_setup(dev);
1007 dev->hard_start_xmit = ieee80211_subif_start_xmit;
1008 dev->wireless_handlers = &ieee80211_iw_handler_def;
1009 dev->set_multicast_list = ieee80211_set_multicast_list;
1010 dev->change_mtu = ieee80211_change_mtu;
1011 dev->open = ieee80211_open;
1012 dev->stop = ieee80211_stop;
1013 dev->destructor = free_netdev;
1014 /* we will validate the address ourselves in ->open */
1015 dev->validate_addr = NULL;
1016 }
1017
1018 /* everything else */
1019
1020 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
1021 {
1022 struct ieee80211_local *local = sdata->local;
1023 struct ieee80211_if_conf conf;
1024
1025 if (WARN_ON(!netif_running(sdata->dev)))
1026 return 0;
1027
1028 if (!local->ops->config_interface)
1029 return 0;
1030
1031 memset(&conf, 0, sizeof(conf));
1032 conf.changed = changed;
1033
1034 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1035 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1036 conf.bssid = sdata->u.sta.bssid;
1037 conf.ssid = sdata->u.sta.ssid;
1038 conf.ssid_len = sdata->u.sta.ssid_len;
1039 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1040 conf.bssid = sdata->dev->dev_addr;
1041 conf.ssid = sdata->u.ap.ssid;
1042 conf.ssid_len = sdata->u.ap.ssid_len;
1043 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1044 u8 zero[ETH_ALEN] = { 0 };
1045 conf.bssid = zero;
1046 conf.ssid = zero;
1047 conf.ssid_len = 0;
1048 } else {
1049 WARN_ON(1);
1050 return -EINVAL;
1051 }
1052
1053 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1054 return -EINVAL;
1055
1056 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1057 return -EINVAL;
1058
1059 return local->ops->config_interface(local_to_hw(local),
1060 &sdata->vif, &conf);
1061 }
1062
1063 int ieee80211_hw_config(struct ieee80211_local *local)
1064 {
1065 struct ieee80211_channel *chan;
1066 int ret = 0;
1067
1068 if (local->sta_sw_scanning)
1069 chan = local->scan_channel;
1070 else
1071 chan = local->oper_channel;
1072
1073 local->hw.conf.channel = chan;
1074
1075 if (!local->hw.conf.power_level)
1076 local->hw.conf.power_level = chan->max_power;
1077 else
1078 local->hw.conf.power_level = min(chan->max_power,
1079 local->hw.conf.power_level);
1080
1081 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1082
1083 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1084 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1085 wiphy_name(local->hw.wiphy), chan->center_freq);
1086 #endif
1087
1088 if (local->open_count)
1089 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1090
1091 return ret;
1092 }
1093
1094 /**
1095 * ieee80211_handle_ht should be used only after legacy configuration
1096 * has been determined namely band, as ht configuration depends upon
1097 * the hardware's HT abilities for a _specific_ band.
1098 */
1099 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1100 struct ieee80211_ht_info *req_ht_cap,
1101 struct ieee80211_ht_bss_info *req_bss_cap)
1102 {
1103 struct ieee80211_conf *conf = &local->hw.conf;
1104 struct ieee80211_supported_band *sband;
1105 struct ieee80211_ht_info ht_conf;
1106 struct ieee80211_ht_bss_info ht_bss_conf;
1107 u32 changed = 0;
1108 int i;
1109 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1110 u8 tx_mcs_set_cap;
1111
1112 sband = local->hw.wiphy->bands[conf->channel->band];
1113
1114 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1115 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1116
1117 /* HT is not supported */
1118 if (!sband->ht_info.ht_supported) {
1119 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1120 goto out;
1121 }
1122
1123 /* disable HT */
1124 if (!enable_ht) {
1125 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1126 changed |= BSS_CHANGED_HT;
1127 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1128 conf->ht_conf.ht_supported = 0;
1129 goto out;
1130 }
1131
1132
1133 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1134 changed |= BSS_CHANGED_HT;
1135
1136 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1137 ht_conf.ht_supported = 1;
1138
1139 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1140 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1141 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1142 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1143 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1144 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1145
1146 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1147 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1148
1149 /* Bits 96-100 */
1150 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1151
1152 /* configure suppoerted Tx MCS according to requested MCS
1153 * (based in most cases on Rx capabilities of peer) and self
1154 * Tx MCS capabilities (as defined by low level driver HW
1155 * Tx capabilities) */
1156 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1157 goto check_changed;
1158
1159 /* Counting from 0 therfore + 1 */
1160 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1161 max_tx_streams = ((tx_mcs_set_cap &
1162 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1163
1164 for (i = 0; i < max_tx_streams; i++)
1165 ht_conf.supp_mcs_set[i] =
1166 sband->ht_info.supp_mcs_set[i] &
1167 req_ht_cap->supp_mcs_set[i];
1168
1169 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1170 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1171 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1172 ht_conf.supp_mcs_set[i] =
1173 sband->ht_info.supp_mcs_set[i] &
1174 req_ht_cap->supp_mcs_set[i];
1175
1176 check_changed:
1177 /* if bss configuration changed store the new one */
1178 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1179 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1180 changed |= BSS_CHANGED_HT;
1181 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1182 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1183 }
1184 out:
1185 return changed;
1186 }
1187
1188 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1189 u32 changed)
1190 {
1191 struct ieee80211_local *local = sdata->local;
1192
1193 if (!changed)
1194 return;
1195
1196 if (local->ops->bss_info_changed)
1197 local->ops->bss_info_changed(local_to_hw(local),
1198 &sdata->vif,
1199 &sdata->bss_conf,
1200 changed);
1201 }
1202
1203 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
1204 {
1205 sdata->bss_conf.use_cts_prot = 0;
1206 sdata->bss_conf.use_short_preamble = 0;
1207 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1208 }
1209
1210 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1211 struct sk_buff *skb)
1212 {
1213 struct ieee80211_local *local = hw_to_local(hw);
1214 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1215 int tmp;
1216
1217 skb->dev = local->mdev;
1218 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1219 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1220 &local->skb_queue : &local->skb_queue_unreliable, skb);
1221 tmp = skb_queue_len(&local->skb_queue) +
1222 skb_queue_len(&local->skb_queue_unreliable);
1223 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1225 dev_kfree_skb_irq(skb);
1226 tmp--;
1227 I802_DEBUG_INC(local->tx_status_drop);
1228 }
1229 tasklet_schedule(&local->tasklet);
1230 }
1231 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1232
1233 static void ieee80211_tasklet_handler(unsigned long data)
1234 {
1235 struct ieee80211_local *local = (struct ieee80211_local *) data;
1236 struct sk_buff *skb;
1237 struct ieee80211_rx_status rx_status;
1238 struct ieee80211_ra_tid *ra_tid;
1239
1240 while ((skb = skb_dequeue(&local->skb_queue)) ||
1241 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1242 switch (skb->pkt_type) {
1243 case IEEE80211_RX_MSG:
1244 /* status is in skb->cb */
1245 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1246 /* Clear skb->pkt_type in order to not confuse kernel
1247 * netstack. */
1248 skb->pkt_type = 0;
1249 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1250 break;
1251 case IEEE80211_TX_STATUS_MSG:
1252 skb->pkt_type = 0;
1253 ieee80211_tx_status(local_to_hw(local), skb);
1254 break;
1255 case IEEE80211_DELBA_MSG:
1256 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1257 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1258 ra_tid->ra, ra_tid->tid);
1259 dev_kfree_skb(skb);
1260 break;
1261 case IEEE80211_ADDBA_MSG:
1262 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1263 ieee80211_start_tx_ba_cb(local_to_hw(local),
1264 ra_tid->ra, ra_tid->tid);
1265 dev_kfree_skb(skb);
1266 break ;
1267 default:
1268 WARN_ON(1);
1269 dev_kfree_skb(skb);
1270 break;
1271 }
1272 }
1273 }
1274
1275 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1276 * make a prepared TX frame (one that has been given to hw) to look like brand
1277 * new IEEE 802.11 frame that is ready to go through TX processing again.
1278 */
1279 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1280 struct ieee80211_key *key,
1281 struct sk_buff *skb)
1282 {
1283 unsigned int hdrlen, iv_len, mic_len;
1284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1285
1286 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1287
1288 if (!key)
1289 goto no_key;
1290
1291 switch (key->conf.alg) {
1292 case ALG_WEP:
1293 iv_len = WEP_IV_LEN;
1294 mic_len = WEP_ICV_LEN;
1295 break;
1296 case ALG_TKIP:
1297 iv_len = TKIP_IV_LEN;
1298 mic_len = TKIP_ICV_LEN;
1299 break;
1300 case ALG_CCMP:
1301 iv_len = CCMP_HDR_LEN;
1302 mic_len = CCMP_MIC_LEN;
1303 break;
1304 default:
1305 goto no_key;
1306 }
1307
1308 if (skb->len >= hdrlen + mic_len &&
1309 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1310 skb_trim(skb, skb->len - mic_len);
1311 if (skb->len >= hdrlen + iv_len) {
1312 memmove(skb->data + iv_len, skb->data, hdrlen);
1313 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
1314 }
1315
1316 no_key:
1317 if (ieee80211_is_data_qos(hdr->frame_control)) {
1318 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1319 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
1320 hdrlen - IEEE80211_QOS_CTL_LEN);
1321 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
1322 }
1323 }
1324
1325 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1326 struct sta_info *sta,
1327 struct sk_buff *skb)
1328 {
1329 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1330
1331 sta->tx_filtered_count++;
1332
1333 /*
1334 * Clear the TX filter mask for this STA when sending the next
1335 * packet. If the STA went to power save mode, this will happen
1336 * when it wakes up for the next time.
1337 */
1338 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1339
1340 /*
1341 * This code races in the following way:
1342 *
1343 * (1) STA sends frame indicating it will go to sleep and does so
1344 * (2) hardware/firmware adds STA to filter list, passes frame up
1345 * (3) hardware/firmware processes TX fifo and suppresses a frame
1346 * (4) we get TX status before having processed the frame and
1347 * knowing that the STA has gone to sleep.
1348 *
1349 * This is actually quite unlikely even when both those events are
1350 * processed from interrupts coming in quickly after one another or
1351 * even at the same time because we queue both TX status events and
1352 * RX frames to be processed by a tasklet and process them in the
1353 * same order that they were received or TX status last. Hence, there
1354 * is no race as long as the frame RX is processed before the next TX
1355 * status, which drivers can ensure, see below.
1356 *
1357 * Note that this can only happen if the hardware or firmware can
1358 * actually add STAs to the filter list, if this is done by the
1359 * driver in response to set_tim() (which will only reduce the race
1360 * this whole filtering tries to solve, not completely solve it)
1361 * this situation cannot happen.
1362 *
1363 * To completely solve this race drivers need to make sure that they
1364 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1365 * functions and
1366 * (b) always process RX events before TX status events if ordering
1367 * can be unknown, for example with different interrupt status
1368 * bits.
1369 */
1370 if (test_sta_flags(sta, WLAN_STA_PS) &&
1371 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1372 ieee80211_remove_tx_extra(local, sta->key, skb);
1373 skb_queue_tail(&sta->tx_filtered, skb);
1374 return;
1375 }
1376
1377 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1378 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1379 /* Software retry the packet once */
1380 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1381 ieee80211_remove_tx_extra(local, sta->key, skb);
1382 dev_queue_xmit(skb);
1383 return;
1384 }
1385
1386 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1387 if (net_ratelimit())
1388 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1389 "queue_len=%d PS=%d @%lu\n",
1390 wiphy_name(local->hw.wiphy),
1391 skb_queue_len(&sta->tx_filtered),
1392 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1393 #endif
1394 dev_kfree_skb(skb);
1395 }
1396
1397 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1398 {
1399 struct sk_buff *skb2;
1400 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1401 struct ieee80211_local *local = hw_to_local(hw);
1402 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1403 u16 frag, type;
1404 __le16 fc;
1405 struct ieee80211_tx_status_rtap_hdr *rthdr;
1406 struct ieee80211_sub_if_data *sdata;
1407 struct net_device *prev_dev = NULL;
1408 struct sta_info *sta;
1409
1410 rcu_read_lock();
1411
1412 if (info->status.excessive_retries) {
1413 sta = sta_info_get(local, hdr->addr1);
1414 if (sta) {
1415 if (test_sta_flags(sta, WLAN_STA_PS)) {
1416 /*
1417 * The STA is in power save mode, so assume
1418 * that this TX packet failed because of that.
1419 */
1420 ieee80211_handle_filtered_frame(local, sta, skb);
1421 rcu_read_unlock();
1422 return;
1423 }
1424 }
1425 }
1426
1427 fc = hdr->frame_control;
1428
1429 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1430 (ieee80211_is_data_qos(fc))) {
1431 u16 tid, ssn;
1432 u8 *qc;
1433 sta = sta_info_get(local, hdr->addr1);
1434 if (sta) {
1435 qc = ieee80211_get_qos_ctl(hdr);
1436 tid = qc[0] & 0xf;
1437 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1438 & IEEE80211_SCTL_SEQ);
1439 ieee80211_send_bar(sta->sdata, hdr->addr1,
1440 tid, ssn);
1441 }
1442 }
1443
1444 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1445 sta = sta_info_get(local, hdr->addr1);
1446 if (sta) {
1447 ieee80211_handle_filtered_frame(local, sta, skb);
1448 rcu_read_unlock();
1449 return;
1450 }
1451 } else
1452 rate_control_tx_status(local->mdev, skb);
1453
1454 rcu_read_unlock();
1455
1456 ieee80211_led_tx(local, 0);
1457
1458 /* SNMP counters
1459 * Fragments are passed to low-level drivers as separate skbs, so these
1460 * are actually fragments, not frames. Update frame counters only for
1461 * the first fragment of the frame. */
1462
1463 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1464 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1465
1466 if (info->flags & IEEE80211_TX_STAT_ACK) {
1467 if (frag == 0) {
1468 local->dot11TransmittedFrameCount++;
1469 if (is_multicast_ether_addr(hdr->addr1))
1470 local->dot11MulticastTransmittedFrameCount++;
1471 if (info->status.retry_count > 0)
1472 local->dot11RetryCount++;
1473 if (info->status.retry_count > 1)
1474 local->dot11MultipleRetryCount++;
1475 }
1476
1477 /* This counter shall be incremented for an acknowledged MPDU
1478 * with an individual address in the address 1 field or an MPDU
1479 * with a multicast address in the address 1 field of type Data
1480 * or Management. */
1481 if (!is_multicast_ether_addr(hdr->addr1) ||
1482 type == IEEE80211_FTYPE_DATA ||
1483 type == IEEE80211_FTYPE_MGMT)
1484 local->dot11TransmittedFragmentCount++;
1485 } else {
1486 if (frag == 0)
1487 local->dot11FailedCount++;
1488 }
1489
1490 /* this was a transmitted frame, but now we want to reuse it */
1491 skb_orphan(skb);
1492
1493 /*
1494 * This is a bit racy but we can avoid a lot of work
1495 * with this test...
1496 */
1497 if (!local->monitors && !local->cooked_mntrs) {
1498 dev_kfree_skb(skb);
1499 return;
1500 }
1501
1502 /* send frame to monitor interfaces now */
1503
1504 if (skb_headroom(skb) < sizeof(*rthdr)) {
1505 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1506 dev_kfree_skb(skb);
1507 return;
1508 }
1509
1510 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1511 skb_push(skb, sizeof(*rthdr));
1512
1513 memset(rthdr, 0, sizeof(*rthdr));
1514 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1515 rthdr->hdr.it_present =
1516 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1517 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1518
1519 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1520 !is_multicast_ether_addr(hdr->addr1))
1521 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1522
1523 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1524 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1525 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1526 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1527 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1528
1529 rthdr->data_retries = info->status.retry_count;
1530
1531 /* XXX: is this sufficient for BPF? */
1532 skb_set_mac_header(skb, 0);
1533 skb->ip_summed = CHECKSUM_UNNECESSARY;
1534 skb->pkt_type = PACKET_OTHERHOST;
1535 skb->protocol = htons(ETH_P_802_2);
1536 memset(skb->cb, 0, sizeof(skb->cb));
1537
1538 rcu_read_lock();
1539 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1540 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1541 if (!netif_running(sdata->dev))
1542 continue;
1543
1544 if (prev_dev) {
1545 skb2 = skb_clone(skb, GFP_ATOMIC);
1546 if (skb2) {
1547 skb2->dev = prev_dev;
1548 netif_rx(skb2);
1549 }
1550 }
1551
1552 prev_dev = sdata->dev;
1553 }
1554 }
1555 if (prev_dev) {
1556 skb->dev = prev_dev;
1557 netif_rx(skb);
1558 skb = NULL;
1559 }
1560 rcu_read_unlock();
1561 dev_kfree_skb(skb);
1562 }
1563 EXPORT_SYMBOL(ieee80211_tx_status);
1564
1565 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1566 const struct ieee80211_ops *ops)
1567 {
1568 struct ieee80211_local *local;
1569 int priv_size;
1570 struct wiphy *wiphy;
1571
1572 /* Ensure 32-byte alignment of our private data and hw private data.
1573 * We use the wiphy priv data for both our ieee80211_local and for
1574 * the driver's private data
1575 *
1576 * In memory it'll be like this:
1577 *
1578 * +-------------------------+
1579 * | struct wiphy |
1580 * +-------------------------+
1581 * | struct ieee80211_local |
1582 * +-------------------------+
1583 * | driver's private data |
1584 * +-------------------------+
1585 *
1586 */
1587 priv_size = ((sizeof(struct ieee80211_local) +
1588 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1589 priv_data_len;
1590
1591 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1592
1593 if (!wiphy)
1594 return NULL;
1595
1596 wiphy->privid = mac80211_wiphy_privid;
1597
1598 local = wiphy_priv(wiphy);
1599 local->hw.wiphy = wiphy;
1600
1601 local->hw.priv = (char *)local +
1602 ((sizeof(struct ieee80211_local) +
1603 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1604
1605 BUG_ON(!ops->tx);
1606 BUG_ON(!ops->start);
1607 BUG_ON(!ops->stop);
1608 BUG_ON(!ops->config);
1609 BUG_ON(!ops->add_interface);
1610 BUG_ON(!ops->remove_interface);
1611 BUG_ON(!ops->configure_filter);
1612 local->ops = ops;
1613
1614 local->hw.queues = 1; /* default */
1615
1616 local->bridge_packets = 1;
1617
1618 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1619 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1620 local->short_retry_limit = 7;
1621 local->long_retry_limit = 4;
1622 local->hw.conf.radio_enabled = 1;
1623
1624 INIT_LIST_HEAD(&local->interfaces);
1625
1626 spin_lock_init(&local->key_lock);
1627
1628 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1629
1630 sta_info_init(local);
1631
1632 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1633 (unsigned long)local);
1634 tasklet_disable(&local->tx_pending_tasklet);
1635
1636 tasklet_init(&local->tasklet,
1637 ieee80211_tasklet_handler,
1638 (unsigned long) local);
1639 tasklet_disable(&local->tasklet);
1640
1641 skb_queue_head_init(&local->skb_queue);
1642 skb_queue_head_init(&local->skb_queue_unreliable);
1643
1644 return local_to_hw(local);
1645 }
1646 EXPORT_SYMBOL(ieee80211_alloc_hw);
1647
1648 int ieee80211_register_hw(struct ieee80211_hw *hw)
1649 {
1650 struct ieee80211_local *local = hw_to_local(hw);
1651 const char *name;
1652 int result;
1653 enum ieee80211_band band;
1654 struct net_device *mdev;
1655 struct wireless_dev *mwdev;
1656
1657 /*
1658 * generic code guarantees at least one band,
1659 * set this very early because much code assumes
1660 * that hw.conf.channel is assigned
1661 */
1662 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1663 struct ieee80211_supported_band *sband;
1664
1665 sband = local->hw.wiphy->bands[band];
1666 if (sband) {
1667 /* init channel we're on */
1668 local->hw.conf.channel =
1669 local->oper_channel =
1670 local->scan_channel = &sband->channels[0];
1671 break;
1672 }
1673 }
1674
1675 result = wiphy_register(local->hw.wiphy);
1676 if (result < 0)
1677 return result;
1678
1679 /*
1680 * We use the number of queues for feature tests (QoS, HT) internally
1681 * so restrict them appropriately.
1682 */
1683 if (hw->queues > IEEE80211_MAX_QUEUES)
1684 hw->queues = IEEE80211_MAX_QUEUES;
1685 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1686 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1687 if (hw->queues < 4)
1688 hw->ampdu_queues = 0;
1689
1690 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1691 "wmaster%d", ether_setup,
1692 ieee80211_num_queues(hw));
1693 if (!mdev)
1694 goto fail_mdev_alloc;
1695
1696 mwdev = netdev_priv(mdev);
1697 mdev->ieee80211_ptr = mwdev;
1698 mwdev->wiphy = local->hw.wiphy;
1699
1700 local->mdev = mdev;
1701
1702 ieee80211_rx_bss_list_init(local);
1703
1704 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1705 mdev->open = ieee80211_master_open;
1706 mdev->stop = ieee80211_master_stop;
1707 mdev->type = ARPHRD_IEEE80211;
1708 mdev->header_ops = &ieee80211_header_ops;
1709 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1710
1711 name = wiphy_dev(local->hw.wiphy)->driver->name;
1712 local->hw.workqueue = create_freezeable_workqueue(name);
1713 if (!local->hw.workqueue) {
1714 result = -ENOMEM;
1715 goto fail_workqueue;
1716 }
1717
1718 /*
1719 * The hardware needs headroom for sending the frame,
1720 * and we need some headroom for passing the frame to monitor
1721 * interfaces, but never both at the same time.
1722 */
1723 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1724 sizeof(struct ieee80211_tx_status_rtap_hdr));
1725
1726 debugfs_hw_add(local);
1727
1728 if (local->hw.conf.beacon_int < 10)
1729 local->hw.conf.beacon_int = 100;
1730
1731 if (local->hw.max_listen_interval == 0)
1732 local->hw.max_listen_interval = 1;
1733
1734 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1735
1736 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1737 IEEE80211_HW_SIGNAL_DB |
1738 IEEE80211_HW_SIGNAL_DBM) ?
1739 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1740 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1741 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1742 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1743 local->wstats_flags |= IW_QUAL_DBM;
1744
1745 result = sta_info_start(local);
1746 if (result < 0)
1747 goto fail_sta_info;
1748
1749 rtnl_lock();
1750 result = dev_alloc_name(local->mdev, local->mdev->name);
1751 if (result < 0)
1752 goto fail_dev;
1753
1754 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1755 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1756
1757 result = register_netdevice(local->mdev);
1758 if (result < 0)
1759 goto fail_dev;
1760
1761 result = ieee80211_init_rate_ctrl_alg(local,
1762 hw->rate_control_algorithm);
1763 if (result < 0) {
1764 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1765 "algorithm\n", wiphy_name(local->hw.wiphy));
1766 goto fail_rate;
1767 }
1768
1769 result = ieee80211_wep_init(local);
1770
1771 if (result < 0) {
1772 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1773 wiphy_name(local->hw.wiphy), result);
1774 goto fail_wep;
1775 }
1776
1777 local->mdev->select_queue = ieee80211_select_queue;
1778
1779 /* add one default STA interface */
1780 result = ieee80211_if_add(local, "wlan%d", NULL,
1781 IEEE80211_IF_TYPE_STA, NULL);
1782 if (result)
1783 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1784 wiphy_name(local->hw.wiphy));
1785
1786 rtnl_unlock();
1787
1788 ieee80211_led_init(local);
1789
1790 return 0;
1791
1792 fail_wep:
1793 rate_control_deinitialize(local);
1794 fail_rate:
1795 unregister_netdevice(local->mdev);
1796 local->mdev = NULL;
1797 fail_dev:
1798 rtnl_unlock();
1799 sta_info_stop(local);
1800 fail_sta_info:
1801 debugfs_hw_del(local);
1802 destroy_workqueue(local->hw.workqueue);
1803 fail_workqueue:
1804 if (local->mdev)
1805 free_netdev(local->mdev);
1806 fail_mdev_alloc:
1807 wiphy_unregister(local->hw.wiphy);
1808 return result;
1809 }
1810 EXPORT_SYMBOL(ieee80211_register_hw);
1811
1812 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1813 {
1814 struct ieee80211_local *local = hw_to_local(hw);
1815
1816 tasklet_kill(&local->tx_pending_tasklet);
1817 tasklet_kill(&local->tasklet);
1818
1819 rtnl_lock();
1820
1821 /*
1822 * At this point, interface list manipulations are fine
1823 * because the driver cannot be handing us frames any
1824 * more and the tasklet is killed.
1825 */
1826
1827 /* First, we remove all virtual interfaces. */
1828 ieee80211_remove_interfaces(local);
1829
1830 /* then, finally, remove the master interface */
1831 unregister_netdevice(local->mdev);
1832
1833 rtnl_unlock();
1834
1835 ieee80211_rx_bss_list_deinit(local);
1836 ieee80211_clear_tx_pending(local);
1837 sta_info_stop(local);
1838 rate_control_deinitialize(local);
1839 debugfs_hw_del(local);
1840
1841 if (skb_queue_len(&local->skb_queue)
1842 || skb_queue_len(&local->skb_queue_unreliable))
1843 printk(KERN_WARNING "%s: skb_queue not empty\n",
1844 wiphy_name(local->hw.wiphy));
1845 skb_queue_purge(&local->skb_queue);
1846 skb_queue_purge(&local->skb_queue_unreliable);
1847
1848 destroy_workqueue(local->hw.workqueue);
1849 wiphy_unregister(local->hw.wiphy);
1850 ieee80211_wep_free(local);
1851 ieee80211_led_exit(local);
1852 free_netdev(local->mdev);
1853 }
1854 EXPORT_SYMBOL(ieee80211_unregister_hw);
1855
1856 void ieee80211_free_hw(struct ieee80211_hw *hw)
1857 {
1858 struct ieee80211_local *local = hw_to_local(hw);
1859
1860 wiphy_free(local->hw.wiphy);
1861 }
1862 EXPORT_SYMBOL(ieee80211_free_hw);
1863
1864 static int __init ieee80211_init(void)
1865 {
1866 struct sk_buff *skb;
1867 int ret;
1868
1869 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1870 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1871 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1872
1873 ret = rc80211_pid_init();
1874 if (ret)
1875 return ret;
1876
1877 ieee80211_debugfs_netdev_init();
1878
1879 return 0;
1880 }
1881
1882 static void __exit ieee80211_exit(void)
1883 {
1884 rc80211_pid_exit();
1885
1886 /*
1887 * For key todo, it'll be empty by now but the work
1888 * might still be scheduled.
1889 */
1890 flush_scheduled_work();
1891
1892 if (mesh_allocated)
1893 ieee80211s_stop();
1894
1895 ieee80211_debugfs_netdev_exit();
1896 }
1897
1898
1899 subsys_initcall(ieee80211_init);
1900 module_exit(ieee80211_exit);
1901
1902 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1903 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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