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modules: fix module waiting for dependent modules' init
[wrt350n-kernel.git] / net / mac80211 / ieee80211.c
blob28bcdf9fc3df426668eea580ea78d6102f3659c1
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_i.h"
28 #include "ieee80211_rate.h"
29 #include "wep.h"
30 #include "wme.h"
31 #include "aes_ccm.h"
32 #include "ieee80211_led.h"
33 #include "cfg.h"
34 #include "debugfs.h"
35 #include "debugfs_netdev.h"
36
37 #define SUPP_MCS_SET_LEN 16
38
39 /*
40 * For seeing transmitted packets on monitor interfaces
41 * we have a radiotap header too.
42 */
43 struct ieee80211_tx_status_rtap_hdr {
44 struct ieee80211_radiotap_header hdr;
45 __le16 tx_flags;
46 u8 data_retries;
47 } __attribute__ ((packed));
48
49 /* common interface routines */
50
51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 {
53 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
54 return ETH_ALEN;
55 }
56
57 /* must be called under mdev tx lock */
58 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 {
60 unsigned int changed_flags;
61 unsigned int new_flags = 0;
62
63 if (atomic_read(&local->iff_promiscs))
64 new_flags |= FIF_PROMISC_IN_BSS;
65
66 if (atomic_read(&local->iff_allmultis))
67 new_flags |= FIF_ALLMULTI;
68
69 if (local->monitors)
70 new_flags |= FIF_CONTROL |
71 FIF_OTHER_BSS |
72 FIF_BCN_PRBRESP_PROMISC;
73
74 changed_flags = local->filter_flags ^ new_flags;
75
76 /* be a bit nasty */
77 new_flags |= (1<<31);
78
79 local->ops->configure_filter(local_to_hw(local),
80 changed_flags, &new_flags,
81 local->mdev->mc_count,
82 local->mdev->mc_list);
83
84 WARN_ON(new_flags & (1<<31));
85
86 local->filter_flags = new_flags & ~(1<<31);
87 }
88
89 /* master interface */
90
91 static int ieee80211_master_open(struct net_device *dev)
92 {
93 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
94 struct ieee80211_sub_if_data *sdata;
95 int res = -EOPNOTSUPP;
96
97 /* we hold the RTNL here so can safely walk the list */
98 list_for_each_entry(sdata, &local->interfaces, list) {
99 if (sdata->dev != dev && netif_running(sdata->dev)) {
100 res = 0;
101 break;
102 }
103 }
104 return res;
105 }
106
107 static int ieee80211_master_stop(struct net_device *dev)
108 {
109 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
110 struct ieee80211_sub_if_data *sdata;
111
112 /* we hold the RTNL here so can safely walk the list */
113 list_for_each_entry(sdata, &local->interfaces, list)
114 if (sdata->dev != dev && netif_running(sdata->dev))
115 dev_close(sdata->dev);
116
117 return 0;
118 }
119
120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
121 {
122 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
123
124 ieee80211_configure_filter(local);
125 }
126
127 /* regular interfaces */
128
129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
130 {
131 /* FIX: what would be proper limits for MTU?
132 * This interface uses 802.3 frames. */
133 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
134 printk(KERN_WARNING "%s: invalid MTU %d\n",
135 dev->name, new_mtu);
136 return -EINVAL;
137 }
138
139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
140 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
142 dev->mtu = new_mtu;
143 return 0;
144 }
145
146 static inline int identical_mac_addr_allowed(int type1, int type2)
147 {
148 return (type1 == IEEE80211_IF_TYPE_MNTR ||
149 type2 == IEEE80211_IF_TYPE_MNTR ||
150 (type1 == IEEE80211_IF_TYPE_AP &&
151 type2 == IEEE80211_IF_TYPE_WDS) ||
152 (type1 == IEEE80211_IF_TYPE_WDS &&
153 (type2 == IEEE80211_IF_TYPE_WDS ||
154 type2 == IEEE80211_IF_TYPE_AP)) ||
155 (type1 == IEEE80211_IF_TYPE_AP &&
156 type2 == IEEE80211_IF_TYPE_VLAN) ||
157 (type1 == IEEE80211_IF_TYPE_VLAN &&
158 (type2 == IEEE80211_IF_TYPE_AP ||
159 type2 == IEEE80211_IF_TYPE_VLAN)));
160 }
161
162 static int ieee80211_open(struct net_device *dev)
163 {
164 struct ieee80211_sub_if_data *sdata, *nsdata;
165 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
166 struct ieee80211_if_init_conf conf;
167 int res;
168 bool need_hw_reconfig = 0;
169
170 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
171
172 /* we hold the RTNL here so can safely walk the list */
173 list_for_each_entry(nsdata, &local->interfaces, list) {
174 struct net_device *ndev = nsdata->dev;
175
176 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
177 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
178 /*
179 * check whether it may have the same address
180 */
181 if (!identical_mac_addr_allowed(sdata->vif.type,
182 nsdata->vif.type))
183 return -ENOTUNIQ;
184
185 /*
186 * can only add VLANs to enabled APs
187 */
188 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
189 nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
190 netif_running(nsdata->dev))
191 sdata->u.vlan.ap = nsdata;
192 }
193 }
194
195 switch (sdata->vif.type) {
196 case IEEE80211_IF_TYPE_WDS:
197 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
198 return -ENOLINK;
199 break;
200 case IEEE80211_IF_TYPE_VLAN:
201 if (!sdata->u.vlan.ap)
202 return -ENOLINK;
203 break;
204 case IEEE80211_IF_TYPE_AP:
205 case IEEE80211_IF_TYPE_STA:
206 case IEEE80211_IF_TYPE_MNTR:
207 case IEEE80211_IF_TYPE_IBSS:
208 /* no special treatment */
209 break;
210 case IEEE80211_IF_TYPE_INVALID:
211 /* cannot happen */
212 WARN_ON(1);
213 break;
214 }
215
216 if (local->open_count == 0) {
217 res = 0;
218 if (local->ops->start)
219 res = local->ops->start(local_to_hw(local));
220 if (res)
221 return res;
222 need_hw_reconfig = 1;
223 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
224 }
225
226 switch (sdata->vif.type) {
227 case IEEE80211_IF_TYPE_VLAN:
228 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
229 /* no need to tell driver */
230 break;
231 case IEEE80211_IF_TYPE_MNTR:
232 /* must be before the call to ieee80211_configure_filter */
233 local->monitors++;
234 if (local->monitors == 1) {
235 netif_tx_lock_bh(local->mdev);
236 ieee80211_configure_filter(local);
237 netif_tx_unlock_bh(local->mdev);
238
239 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
240 }
241 break;
242 case IEEE80211_IF_TYPE_STA:
243 case IEEE80211_IF_TYPE_IBSS:
244 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
245 /* fall through */
246 default:
247 conf.vif = &sdata->vif;
248 conf.type = sdata->vif.type;
249 conf.mac_addr = dev->dev_addr;
250 res = local->ops->add_interface(local_to_hw(local), &conf);
251 if (res && !local->open_count && local->ops->stop)
252 local->ops->stop(local_to_hw(local));
253 if (res)
254 return res;
255
256 ieee80211_if_config(dev);
257 ieee80211_reset_erp_info(dev);
258 ieee80211_enable_keys(sdata);
259
260 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
261 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
262 netif_carrier_off(dev);
263 else
264 netif_carrier_on(dev);
265 }
266
267 if (local->open_count == 0) {
268 res = dev_open(local->mdev);
269 WARN_ON(res);
270 tasklet_enable(&local->tx_pending_tasklet);
271 tasklet_enable(&local->tasklet);
272 }
273
274 /*
275 * set_multicast_list will be invoked by the networking core
276 * which will check whether any increments here were done in
277 * error and sync them down to the hardware as filter flags.
278 */
279 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
280 atomic_inc(&local->iff_allmultis);
281
282 if (sdata->flags & IEEE80211_SDATA_PROMISC)
283 atomic_inc(&local->iff_promiscs);
284
285 local->open_count++;
286 if (need_hw_reconfig)
287 ieee80211_hw_config(local);
288
289 netif_start_queue(dev);
290
291 return 0;
292 }
293
294 static int ieee80211_stop(struct net_device *dev)
295 {
296 struct ieee80211_sub_if_data *sdata;
297 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
298 struct ieee80211_if_init_conf conf;
299 struct sta_info *sta;
300 int i;
301
302 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
303
304 list_for_each_entry(sta, &local->sta_list, list) {
305 if (sta->dev == dev)
306 for (i = 0; i < STA_TID_NUM; i++)
307 ieee80211_sta_stop_rx_ba_session(sta->dev,
308 sta->addr, i,
309 WLAN_BACK_RECIPIENT,
310 WLAN_REASON_QSTA_LEAVE_QBSS);
311 }
312
313 netif_stop_queue(dev);
314
315 /*
316 * Don't count this interface for promisc/allmulti while it
317 * is down. dev_mc_unsync() will invoke set_multicast_list
318 * on the master interface which will sync these down to the
319 * hardware as filter flags.
320 */
321 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
322 atomic_dec(&local->iff_allmultis);
323
324 if (sdata->flags & IEEE80211_SDATA_PROMISC)
325 atomic_dec(&local->iff_promiscs);
326
327 dev_mc_unsync(local->mdev, dev);
328
329 /* APs need special treatment */
330 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
331 struct ieee80211_sub_if_data *vlan, *tmp;
332 struct beacon_data *old_beacon = sdata->u.ap.beacon;
333
334 /* remove beacon */
335 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
336 synchronize_rcu();
337 kfree(old_beacon);
338
339 /* down all dependent devices, that is VLANs */
340 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
341 u.vlan.list)
342 dev_close(vlan->dev);
343 WARN_ON(!list_empty(&sdata->u.ap.vlans));
344 }
345
346 local->open_count--;
347
348 switch (sdata->vif.type) {
349 case IEEE80211_IF_TYPE_VLAN:
350 list_del(&sdata->u.vlan.list);
351 sdata->u.vlan.ap = NULL;
352 /* no need to tell driver */
353 break;
354 case IEEE80211_IF_TYPE_MNTR:
355 local->monitors--;
356 if (local->monitors == 0) {
357 netif_tx_lock_bh(local->mdev);
358 ieee80211_configure_filter(local);
359 netif_tx_unlock_bh(local->mdev);
360
361 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
362 }
363 break;
364 case IEEE80211_IF_TYPE_STA:
365 case IEEE80211_IF_TYPE_IBSS:
366 sdata->u.sta.state = IEEE80211_DISABLED;
367 del_timer_sync(&sdata->u.sta.timer);
368 /*
369 * When we get here, the interface is marked down.
370 * Call synchronize_rcu() to wait for the RX path
371 * should it be using the interface and enqueuing
372 * frames at this very time on another CPU.
373 */
374 synchronize_rcu();
375 skb_queue_purge(&sdata->u.sta.skb_queue);
376
377 if (local->scan_dev == sdata->dev) {
378 if (!local->ops->hw_scan) {
379 local->sta_sw_scanning = 0;
380 cancel_delayed_work(&local->scan_work);
381 } else
382 local->sta_hw_scanning = 0;
383 }
384
385 flush_workqueue(local->hw.workqueue);
386
387 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
388 kfree(sdata->u.sta.extra_ie);
389 sdata->u.sta.extra_ie = NULL;
390 sdata->u.sta.extra_ie_len = 0;
391 /* fall through */
392 default:
393 conf.vif = &sdata->vif;
394 conf.type = sdata->vif.type;
395 conf.mac_addr = dev->dev_addr;
396 /* disable all keys for as long as this netdev is down */
397 ieee80211_disable_keys(sdata);
398 local->ops->remove_interface(local_to_hw(local), &conf);
399 }
400
401 if (local->open_count == 0) {
402 if (netif_running(local->mdev))
403 dev_close(local->mdev);
404
405 if (local->ops->stop)
406 local->ops->stop(local_to_hw(local));
407
408 ieee80211_led_radio(local, 0);
409
410 tasklet_disable(&local->tx_pending_tasklet);
411 tasklet_disable(&local->tasklet);
412 }
413
414 return 0;
415 }
416
417 static void ieee80211_set_multicast_list(struct net_device *dev)
418 {
419 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
420 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
421 int allmulti, promisc, sdata_allmulti, sdata_promisc;
422
423 allmulti = !!(dev->flags & IFF_ALLMULTI);
424 promisc = !!(dev->flags & IFF_PROMISC);
425 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
426 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
427
428 if (allmulti != sdata_allmulti) {
429 if (dev->flags & IFF_ALLMULTI)
430 atomic_inc(&local->iff_allmultis);
431 else
432 atomic_dec(&local->iff_allmultis);
433 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
434 }
435
436 if (promisc != sdata_promisc) {
437 if (dev->flags & IFF_PROMISC)
438 atomic_inc(&local->iff_promiscs);
439 else
440 atomic_dec(&local->iff_promiscs);
441 sdata->flags ^= IEEE80211_SDATA_PROMISC;
442 }
443
444 dev_mc_sync(local->mdev, dev);
445 }
446
447 static const struct header_ops ieee80211_header_ops = {
448 .create = eth_header,
449 .parse = header_parse_80211,
450 .rebuild = eth_rebuild_header,
451 .cache = eth_header_cache,
452 .cache_update = eth_header_cache_update,
453 };
454
455 /* Must not be called for mdev */
456 void ieee80211_if_setup(struct net_device *dev)
457 {
458 ether_setup(dev);
459 dev->hard_start_xmit = ieee80211_subif_start_xmit;
460 dev->wireless_handlers = &ieee80211_iw_handler_def;
461 dev->set_multicast_list = ieee80211_set_multicast_list;
462 dev->change_mtu = ieee80211_change_mtu;
463 dev->open = ieee80211_open;
464 dev->stop = ieee80211_stop;
465 dev->destructor = ieee80211_if_free;
466 }
467
468 /* WDS specialties */
469
470 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
471 {
472 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
473 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
474 struct sta_info *sta;
475 DECLARE_MAC_BUF(mac);
476
477 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
478 return 0;
479
480 /* Create STA entry for the new peer */
481 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
482 if (!sta)
483 return -ENOMEM;
484 sta_info_put(sta);
485
486 /* Remove STA entry for the old peer */
487 sta = sta_info_get(local, sdata->u.wds.remote_addr);
488 if (sta) {
489 sta_info_free(sta);
490 sta_info_put(sta);
491 } else {
492 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
493 "peer %s\n",
494 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
495 }
496
497 /* Update WDS link data */
498 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
499
500 return 0;
501 }
502
503 /* everything else */
504
505 static int __ieee80211_if_config(struct net_device *dev,
506 struct sk_buff *beacon,
507 struct ieee80211_tx_control *control)
508 {
509 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
510 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
511 struct ieee80211_if_conf conf;
512
513 if (!local->ops->config_interface || !netif_running(dev))
514 return 0;
515
516 memset(&conf, 0, sizeof(conf));
517 conf.type = sdata->vif.type;
518 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
519 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
520 conf.bssid = sdata->u.sta.bssid;
521 conf.ssid = sdata->u.sta.ssid;
522 conf.ssid_len = sdata->u.sta.ssid_len;
523 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
524 conf.ssid = sdata->u.ap.ssid;
525 conf.ssid_len = sdata->u.ap.ssid_len;
526 conf.beacon = beacon;
527 conf.beacon_control = control;
528 }
529 return local->ops->config_interface(local_to_hw(local),
530 &sdata->vif, &conf);
531 }
532
533 int ieee80211_if_config(struct net_device *dev)
534 {
535 return __ieee80211_if_config(dev, NULL, NULL);
536 }
537
538 int ieee80211_if_config_beacon(struct net_device *dev)
539 {
540 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
541 struct ieee80211_tx_control control;
542 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
543 struct sk_buff *skb;
544
545 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
546 return 0;
547 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
548 &control);
549 if (!skb)
550 return -ENOMEM;
551 return __ieee80211_if_config(dev, skb, &control);
552 }
553
554 int ieee80211_hw_config(struct ieee80211_local *local)
555 {
556 struct ieee80211_hw_mode *mode;
557 struct ieee80211_channel *chan;
558 int ret = 0;
559
560 if (local->sta_sw_scanning) {
561 chan = local->scan_channel;
562 mode = local->scan_hw_mode;
563 } else {
564 chan = local->oper_channel;
565 mode = local->oper_hw_mode;
566 }
567
568 local->hw.conf.channel = chan->chan;
569 local->hw.conf.channel_val = chan->val;
570 if (!local->hw.conf.power_level) {
571 local->hw.conf.power_level = chan->power_level;
572 } else {
573 local->hw.conf.power_level = min(chan->power_level,
574 local->hw.conf.power_level);
575 }
576 local->hw.conf.freq = chan->freq;
577 local->hw.conf.phymode = mode->mode;
578 local->hw.conf.antenna_max = chan->antenna_max;
579 local->hw.conf.chan = chan;
580 local->hw.conf.mode = mode;
581
582 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
583 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
584 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
585 local->hw.conf.phymode);
586 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
587
588 if (local->open_count)
589 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
590
591 return ret;
592 }
593
594 /**
595 * ieee80211_hw_config_ht should be used only after legacy configuration
596 * has been determined, as ht configuration depends upon the hardware's
597 * HT abilities for a _specific_ band.
598 */
599 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
600 struct ieee80211_ht_info *req_ht_cap,
601 struct ieee80211_ht_bss_info *req_bss_cap)
602 {
603 struct ieee80211_conf *conf = &local->hw.conf;
604 struct ieee80211_hw_mode *mode = conf->mode;
605 int i;
606
607 /* HT is not supported */
608 if (!mode->ht_info.ht_supported) {
609 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
610 return -EOPNOTSUPP;
611 }
612
613 /* disable HT */
614 if (!enable_ht) {
615 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
616 } else {
617 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
618 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
619 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
620 conf->ht_conf.cap |=
621 mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
622 conf->ht_bss_conf.primary_channel =
623 req_bss_cap->primary_channel;
624 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
625 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
626 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
627 conf->ht_conf.supp_mcs_set[i] =
628 mode->ht_info.supp_mcs_set[i] &
629 req_ht_cap->supp_mcs_set[i];
630
631 /* In STA mode, this gives us indication
632 * to the AP's mode of operation */
633 conf->ht_conf.ht_supported = 1;
634 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
635 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
636 }
637
638 local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
639
640 return 0;
641 }
642
643 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
644 u32 changed)
645 {
646 struct ieee80211_local *local = sdata->local;
647
648 if (!changed)
649 return;
650
651 if (local->ops->bss_info_changed)
652 local->ops->bss_info_changed(local_to_hw(local),
653 &sdata->vif,
654 &sdata->bss_conf,
655 changed);
656 }
657
658 void ieee80211_reset_erp_info(struct net_device *dev)
659 {
660 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
661
662 sdata->bss_conf.use_cts_prot = 0;
663 sdata->bss_conf.use_short_preamble = 0;
664 ieee80211_bss_info_change_notify(sdata,
665 BSS_CHANGED_ERP_CTS_PROT |
666 BSS_CHANGED_ERP_PREAMBLE);
667 }
668
669 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
670 struct sk_buff *skb,
671 struct ieee80211_tx_status *status)
672 {
673 struct ieee80211_local *local = hw_to_local(hw);
674 struct ieee80211_tx_status *saved;
675 int tmp;
676
677 skb->dev = local->mdev;
678 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
679 if (unlikely(!saved)) {
680 if (net_ratelimit())
681 printk(KERN_WARNING "%s: Not enough memory, "
682 "dropping tx status", skb->dev->name);
683 /* should be dev_kfree_skb_irq, but due to this function being
684 * named _irqsafe instead of just _irq we can't be sure that
685 * people won't call it from non-irq contexts */
686 dev_kfree_skb_any(skb);
687 return;
688 }
689 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
690 /* copy pointer to saved status into skb->cb for use by tasklet */
691 memcpy(skb->cb, &saved, sizeof(saved));
692
693 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
694 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
695 &local->skb_queue : &local->skb_queue_unreliable, skb);
696 tmp = skb_queue_len(&local->skb_queue) +
697 skb_queue_len(&local->skb_queue_unreliable);
698 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
699 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
700 memcpy(&saved, skb->cb, sizeof(saved));
701 kfree(saved);
702 dev_kfree_skb_irq(skb);
703 tmp--;
704 I802_DEBUG_INC(local->tx_status_drop);
705 }
706 tasklet_schedule(&local->tasklet);
707 }
708 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
709
710 static void ieee80211_tasklet_handler(unsigned long data)
711 {
712 struct ieee80211_local *local = (struct ieee80211_local *) data;
713 struct sk_buff *skb;
714 struct ieee80211_rx_status rx_status;
715 struct ieee80211_tx_status *tx_status;
716
717 while ((skb = skb_dequeue(&local->skb_queue)) ||
718 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
719 switch (skb->pkt_type) {
720 case IEEE80211_RX_MSG:
721 /* status is in skb->cb */
722 memcpy(&rx_status, skb->cb, sizeof(rx_status));
723 /* Clear skb->pkt_type in order to not confuse kernel
724 * netstack. */
725 skb->pkt_type = 0;
726 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
727 break;
728 case IEEE80211_TX_STATUS_MSG:
729 /* get pointer to saved status out of skb->cb */
730 memcpy(&tx_status, skb->cb, sizeof(tx_status));
731 skb->pkt_type = 0;
732 ieee80211_tx_status(local_to_hw(local),
733 skb, tx_status);
734 kfree(tx_status);
735 break;
736 default: /* should never get here! */
737 printk(KERN_ERR "%s: Unknown message type (%d)\n",
738 wiphy_name(local->hw.wiphy), skb->pkt_type);
739 dev_kfree_skb(skb);
740 break;
741 }
742 }
743 }
744
745 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
746 * make a prepared TX frame (one that has been given to hw) to look like brand
747 * new IEEE 802.11 frame that is ready to go through TX processing again.
748 * Also, tx_packet_data in cb is restored from tx_control. */
749 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
750 struct ieee80211_key *key,
751 struct sk_buff *skb,
752 struct ieee80211_tx_control *control)
753 {
754 int hdrlen, iv_len, mic_len;
755 struct ieee80211_tx_packet_data *pkt_data;
756
757 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
758 pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
759 pkt_data->flags = 0;
760 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
761 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
762 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
763 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
764 if (control->flags & IEEE80211_TXCTL_REQUEUE)
765 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
766 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
767 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
768 pkt_data->queue = control->queue;
769
770 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
771
772 if (!key)
773 goto no_key;
774
775 switch (key->conf.alg) {
776 case ALG_WEP:
777 iv_len = WEP_IV_LEN;
778 mic_len = WEP_ICV_LEN;
779 break;
780 case ALG_TKIP:
781 iv_len = TKIP_IV_LEN;
782 mic_len = TKIP_ICV_LEN;
783 break;
784 case ALG_CCMP:
785 iv_len = CCMP_HDR_LEN;
786 mic_len = CCMP_MIC_LEN;
787 break;
788 default:
789 goto no_key;
790 }
791
792 if (skb->len >= mic_len &&
793 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
794 skb_trim(skb, skb->len - mic_len);
795 if (skb->len >= iv_len && skb->len > hdrlen) {
796 memmove(skb->data + iv_len, skb->data, hdrlen);
797 skb_pull(skb, iv_len);
798 }
799
800 no_key:
801 {
802 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
803 u16 fc = le16_to_cpu(hdr->frame_control);
804 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
805 fc &= ~IEEE80211_STYPE_QOS_DATA;
806 hdr->frame_control = cpu_to_le16(fc);
807 memmove(skb->data + 2, skb->data, hdrlen - 2);
808 skb_pull(skb, 2);
809 }
810 }
811 }
812
813 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
814 struct ieee80211_tx_status *status)
815 {
816 struct sk_buff *skb2;
817 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
818 struct ieee80211_local *local = hw_to_local(hw);
819 u16 frag, type;
820 struct ieee80211_tx_status_rtap_hdr *rthdr;
821 struct ieee80211_sub_if_data *sdata;
822 int monitors;
823
824 if (!status) {
825 printk(KERN_ERR
826 "%s: ieee80211_tx_status called with NULL status\n",
827 wiphy_name(local->hw.wiphy));
828 dev_kfree_skb(skb);
829 return;
830 }
831
832 if (status->excessive_retries) {
833 struct sta_info *sta;
834 sta = sta_info_get(local, hdr->addr1);
835 if (sta) {
836 if (sta->flags & WLAN_STA_PS) {
837 /* The STA is in power save mode, so assume
838 * that this TX packet failed because of that.
839 */
840 status->excessive_retries = 0;
841 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
842 }
843 sta_info_put(sta);
844 }
845 }
846
847 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
848 struct sta_info *sta;
849 sta = sta_info_get(local, hdr->addr1);
850 if (sta) {
851 sta->tx_filtered_count++;
852
853 /* Clear the TX filter mask for this STA when sending
854 * the next packet. If the STA went to power save mode,
855 * this will happen when it is waking up for the next
856 * time. */
857 sta->clear_dst_mask = 1;
858
859 /* TODO: Is the WLAN_STA_PS flag always set here or is
860 * the race between RX and TX status causing some
861 * packets to be filtered out before 80211.o gets an
862 * update for PS status? This seems to be the case, so
863 * no changes are likely to be needed. */
864 if (sta->flags & WLAN_STA_PS &&
865 skb_queue_len(&sta->tx_filtered) <
866 STA_MAX_TX_BUFFER) {
867 ieee80211_remove_tx_extra(local, sta->key,
868 skb,
869 &status->control);
870 skb_queue_tail(&sta->tx_filtered, skb);
871 } else if (!(sta->flags & WLAN_STA_PS) &&
872 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
873 /* Software retry the packet once */
874 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
875 ieee80211_remove_tx_extra(local, sta->key,
876 skb,
877 &status->control);
878 dev_queue_xmit(skb);
879 } else {
880 if (net_ratelimit()) {
881 printk(KERN_DEBUG "%s: dropped TX "
882 "filtered frame queue_len=%d "
883 "PS=%d @%lu\n",
884 wiphy_name(local->hw.wiphy),
885 skb_queue_len(
886 &sta->tx_filtered),
887 !!(sta->flags & WLAN_STA_PS),
888 jiffies);
889 }
890 dev_kfree_skb(skb);
891 }
892 sta_info_put(sta);
893 return;
894 }
895 } else
896 rate_control_tx_status(local->mdev, skb, status);
897
898 ieee80211_led_tx(local, 0);
899
900 /* SNMP counters
901 * Fragments are passed to low-level drivers as separate skbs, so these
902 * are actually fragments, not frames. Update frame counters only for
903 * the first fragment of the frame. */
904
905 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
906 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
907
908 if (status->flags & IEEE80211_TX_STATUS_ACK) {
909 if (frag == 0) {
910 local->dot11TransmittedFrameCount++;
911 if (is_multicast_ether_addr(hdr->addr1))
912 local->dot11MulticastTransmittedFrameCount++;
913 if (status->retry_count > 0)
914 local->dot11RetryCount++;
915 if (status->retry_count > 1)
916 local->dot11MultipleRetryCount++;
917 }
918
919 /* This counter shall be incremented for an acknowledged MPDU
920 * with an individual address in the address 1 field or an MPDU
921 * with a multicast address in the address 1 field of type Data
922 * or Management. */
923 if (!is_multicast_ether_addr(hdr->addr1) ||
924 type == IEEE80211_FTYPE_DATA ||
925 type == IEEE80211_FTYPE_MGMT)
926 local->dot11TransmittedFragmentCount++;
927 } else {
928 if (frag == 0)
929 local->dot11FailedCount++;
930 }
931
932 /* this was a transmitted frame, but now we want to reuse it */
933 skb_orphan(skb);
934
935 if (!local->monitors) {
936 dev_kfree_skb(skb);
937 return;
938 }
939
940 /* send frame to monitor interfaces now */
941
942 if (skb_headroom(skb) < sizeof(*rthdr)) {
943 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
944 dev_kfree_skb(skb);
945 return;
946 }
947
948 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
949 skb_push(skb, sizeof(*rthdr));
950
951 memset(rthdr, 0, sizeof(*rthdr));
952 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
953 rthdr->hdr.it_present =
954 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
955 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
956
957 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
958 !is_multicast_ether_addr(hdr->addr1))
959 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
960
961 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
962 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
963 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
964 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
965 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
966
967 rthdr->data_retries = status->retry_count;
968
969 rcu_read_lock();
970 monitors = local->monitors;
971 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
972 /*
973 * Using the monitors counter is possibly racy, but
974 * if the value is wrong we simply either clone the skb
975 * once too much or forget sending it to one monitor iface
976 * The latter case isn't nice but fixing the race is much
977 * more complicated.
978 */
979 if (!monitors || !skb)
980 goto out;
981
982 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
983 if (!netif_running(sdata->dev))
984 continue;
985 monitors--;
986 if (monitors)
987 skb2 = skb_clone(skb, GFP_ATOMIC);
988 else
989 skb2 = NULL;
990 skb->dev = sdata->dev;
991 /* XXX: is this sufficient for BPF? */
992 skb_set_mac_header(skb, 0);
993 skb->ip_summed = CHECKSUM_UNNECESSARY;
994 skb->pkt_type = PACKET_OTHERHOST;
995 skb->protocol = htons(ETH_P_802_2);
996 memset(skb->cb, 0, sizeof(skb->cb));
997 netif_rx(skb);
998 skb = skb2;
999 }
1000 }
1001 out:
1002 rcu_read_unlock();
1003 if (skb)
1004 dev_kfree_skb(skb);
1005 }
1006 EXPORT_SYMBOL(ieee80211_tx_status);
1007
1008 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1009 const struct ieee80211_ops *ops)
1010 {
1011 struct net_device *mdev;
1012 struct ieee80211_local *local;
1013 struct ieee80211_sub_if_data *sdata;
1014 int priv_size;
1015 struct wiphy *wiphy;
1016
1017 /* Ensure 32-byte alignment of our private data and hw private data.
1018 * We use the wiphy priv data for both our ieee80211_local and for
1019 * the driver's private data
1020 *
1021 * In memory it'll be like this:
1022 *
1023 * +-------------------------+
1024 * | struct wiphy |
1025 * +-------------------------+
1026 * | struct ieee80211_local |
1027 * +-------------------------+
1028 * | driver's private data |
1029 * +-------------------------+
1030 *
1031 */
1032 priv_size = ((sizeof(struct ieee80211_local) +
1033 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1034 priv_data_len;
1035
1036 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1037
1038 if (!wiphy)
1039 return NULL;
1040
1041 wiphy->privid = mac80211_wiphy_privid;
1042
1043 local = wiphy_priv(wiphy);
1044 local->hw.wiphy = wiphy;
1045
1046 local->hw.priv = (char *)local +
1047 ((sizeof(struct ieee80211_local) +
1048 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1049
1050 BUG_ON(!ops->tx);
1051 BUG_ON(!ops->start);
1052 BUG_ON(!ops->stop);
1053 BUG_ON(!ops->config);
1054 BUG_ON(!ops->add_interface);
1055 BUG_ON(!ops->remove_interface);
1056 BUG_ON(!ops->configure_filter);
1057 local->ops = ops;
1058
1059 /* for now, mdev needs sub_if_data :/ */
1060 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1061 "wmaster%d", ether_setup);
1062 if (!mdev) {
1063 wiphy_free(wiphy);
1064 return NULL;
1065 }
1066
1067 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1068 mdev->ieee80211_ptr = &sdata->wdev;
1069 sdata->wdev.wiphy = wiphy;
1070
1071 local->hw.queues = 1; /* default */
1072
1073 local->mdev = mdev;
1074 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1075 local->rx_handlers = ieee80211_rx_handlers;
1076 local->tx_handlers = ieee80211_tx_handlers;
1077
1078 local->bridge_packets = 1;
1079
1080 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1081 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1082 local->short_retry_limit = 7;
1083 local->long_retry_limit = 4;
1084 local->hw.conf.radio_enabled = 1;
1085
1086 local->enabled_modes = ~0;
1087
1088 INIT_LIST_HEAD(&local->modes_list);
1089
1090 INIT_LIST_HEAD(&local->interfaces);
1091
1092 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1093 ieee80211_rx_bss_list_init(mdev);
1094
1095 sta_info_init(local);
1096
1097 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1098 mdev->open = ieee80211_master_open;
1099 mdev->stop = ieee80211_master_stop;
1100 mdev->type = ARPHRD_IEEE80211;
1101 mdev->header_ops = &ieee80211_header_ops;
1102 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1103
1104 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1105 sdata->dev = mdev;
1106 sdata->local = local;
1107 sdata->u.ap.force_unicast_rateidx = -1;
1108 sdata->u.ap.max_ratectrl_rateidx = -1;
1109 ieee80211_if_sdata_init(sdata);
1110 /* no RCU needed since we're still during init phase */
1111 list_add_tail(&sdata->list, &local->interfaces);
1112
1113 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1114 (unsigned long)local);
1115 tasklet_disable(&local->tx_pending_tasklet);
1116
1117 tasklet_init(&local->tasklet,
1118 ieee80211_tasklet_handler,
1119 (unsigned long) local);
1120 tasklet_disable(&local->tasklet);
1121
1122 skb_queue_head_init(&local->skb_queue);
1123 skb_queue_head_init(&local->skb_queue_unreliable);
1124
1125 return local_to_hw(local);
1126 }
1127 EXPORT_SYMBOL(ieee80211_alloc_hw);
1128
1129 int ieee80211_register_hw(struct ieee80211_hw *hw)
1130 {
1131 struct ieee80211_local *local = hw_to_local(hw);
1132 const char *name;
1133 int result;
1134
1135 result = wiphy_register(local->hw.wiphy);
1136 if (result < 0)
1137 return result;
1138
1139 name = wiphy_dev(local->hw.wiphy)->driver->name;
1140 local->hw.workqueue = create_singlethread_workqueue(name);
1141 if (!local->hw.workqueue) {
1142 result = -ENOMEM;
1143 goto fail_workqueue;
1144 }
1145
1146 /*
1147 * The hardware needs headroom for sending the frame,
1148 * and we need some headroom for passing the frame to monitor
1149 * interfaces, but never both at the same time.
1150 */
1151 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1152 sizeof(struct ieee80211_tx_status_rtap_hdr));
1153
1154 debugfs_hw_add(local);
1155
1156 local->hw.conf.beacon_int = 1000;
1157
1158 local->wstats_flags |= local->hw.max_rssi ?
1159 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1160 local->wstats_flags |= local->hw.max_signal ?
1161 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1162 local->wstats_flags |= local->hw.max_noise ?
1163 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1164 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1165 local->wstats_flags |= IW_QUAL_DBM;
1166
1167 result = sta_info_start(local);
1168 if (result < 0)
1169 goto fail_sta_info;
1170
1171 rtnl_lock();
1172 result = dev_alloc_name(local->mdev, local->mdev->name);
1173 if (result < 0)
1174 goto fail_dev;
1175
1176 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1177 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1178
1179 result = register_netdevice(local->mdev);
1180 if (result < 0)
1181 goto fail_dev;
1182
1183 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1184 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1185
1186 result = ieee80211_init_rate_ctrl_alg(local,
1187 hw->rate_control_algorithm);
1188 if (result < 0) {
1189 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1190 "algorithm\n", wiphy_name(local->hw.wiphy));
1191 goto fail_rate;
1192 }
1193
1194 result = ieee80211_wep_init(local);
1195
1196 if (result < 0) {
1197 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1198 wiphy_name(local->hw.wiphy));
1199 goto fail_wep;
1200 }
1201
1202 ieee80211_install_qdisc(local->mdev);
1203
1204 /* add one default STA interface */
1205 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1206 IEEE80211_IF_TYPE_STA);
1207 if (result)
1208 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1209 wiphy_name(local->hw.wiphy));
1210
1211 local->reg_state = IEEE80211_DEV_REGISTERED;
1212 rtnl_unlock();
1213
1214 ieee80211_led_init(local);
1215
1216 return 0;
1217
1218 fail_wep:
1219 rate_control_deinitialize(local);
1220 fail_rate:
1221 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1222 unregister_netdevice(local->mdev);
1223 fail_dev:
1224 rtnl_unlock();
1225 sta_info_stop(local);
1226 fail_sta_info:
1227 debugfs_hw_del(local);
1228 destroy_workqueue(local->hw.workqueue);
1229 fail_workqueue:
1230 wiphy_unregister(local->hw.wiphy);
1231 return result;
1232 }
1233 EXPORT_SYMBOL(ieee80211_register_hw);
1234
1235 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1236 struct ieee80211_hw_mode *mode)
1237 {
1238 struct ieee80211_local *local = hw_to_local(hw);
1239 struct ieee80211_rate *rate;
1240 int i;
1241
1242 INIT_LIST_HEAD(&mode->list);
1243 list_add_tail(&mode->list, &local->modes_list);
1244
1245 local->hw_modes |= (1 << mode->mode);
1246 for (i = 0; i < mode->num_rates; i++) {
1247 rate = &(mode->rates[i]);
1248 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1249 }
1250 ieee80211_prepare_rates(local, mode);
1251
1252 if (!local->oper_hw_mode) {
1253 /* Default to this mode */
1254 local->hw.conf.phymode = mode->mode;
1255 local->oper_hw_mode = local->scan_hw_mode = mode;
1256 local->oper_channel = local->scan_channel = &mode->channels[0];
1257 local->hw.conf.mode = local->oper_hw_mode;
1258 local->hw.conf.chan = local->oper_channel;
1259 }
1260
1261 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1262 ieee80211_set_default_regdomain(mode);
1263
1264 return 0;
1265 }
1266 EXPORT_SYMBOL(ieee80211_register_hwmode);
1267
1268 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1269 {
1270 struct ieee80211_local *local = hw_to_local(hw);
1271 struct ieee80211_sub_if_data *sdata, *tmp;
1272 int i;
1273
1274 tasklet_kill(&local->tx_pending_tasklet);
1275 tasklet_kill(&local->tasklet);
1276
1277 rtnl_lock();
1278
1279 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1280
1281 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1282
1283 /*
1284 * At this point, interface list manipulations are fine
1285 * because the driver cannot be handing us frames any
1286 * more and the tasklet is killed.
1287 */
1288
1289 /*
1290 * First, we remove all non-master interfaces. Do this because they
1291 * may have bss pointer dependency on the master, and when we free
1292 * the master these would be freed as well, breaking our list
1293 * iteration completely.
1294 */
1295 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1296 if (sdata->dev == local->mdev)
1297 continue;
1298 list_del(&sdata->list);
1299 __ieee80211_if_del(local, sdata);
1300 }
1301
1302 /* then, finally, remove the master interface */
1303 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1304
1305 rtnl_unlock();
1306
1307 ieee80211_rx_bss_list_deinit(local->mdev);
1308 ieee80211_clear_tx_pending(local);
1309 sta_info_stop(local);
1310 rate_control_deinitialize(local);
1311 debugfs_hw_del(local);
1312
1313 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1314 kfree(local->supp_rates[i]);
1315 kfree(local->basic_rates[i]);
1316 }
1317
1318 if (skb_queue_len(&local->skb_queue)
1319 || skb_queue_len(&local->skb_queue_unreliable))
1320 printk(KERN_WARNING "%s: skb_queue not empty\n",
1321 wiphy_name(local->hw.wiphy));
1322 skb_queue_purge(&local->skb_queue);
1323 skb_queue_purge(&local->skb_queue_unreliable);
1324
1325 destroy_workqueue(local->hw.workqueue);
1326 wiphy_unregister(local->hw.wiphy);
1327 ieee80211_wep_free(local);
1328 ieee80211_led_exit(local);
1329 }
1330 EXPORT_SYMBOL(ieee80211_unregister_hw);
1331
1332 void ieee80211_free_hw(struct ieee80211_hw *hw)
1333 {
1334 struct ieee80211_local *local = hw_to_local(hw);
1335
1336 ieee80211_if_free(local->mdev);
1337 wiphy_free(local->hw.wiphy);
1338 }
1339 EXPORT_SYMBOL(ieee80211_free_hw);
1340
1341 static int __init ieee80211_init(void)
1342 {
1343 struct sk_buff *skb;
1344 int ret;
1345
1346 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1347
1348 ret = rc80211_simple_init();
1349 if (ret)
1350 goto out;
1351
1352 ret = rc80211_pid_init();
1353 if (ret)
1354 goto out_cleanup_simple;
1355
1356 ret = ieee80211_wme_register();
1357 if (ret) {
1358 printk(KERN_DEBUG "ieee80211_init: failed to "
1359 "initialize WME (err=%d)\n", ret);
1360 goto out_cleanup_pid;
1361 }
1362
1363 ieee80211_debugfs_netdev_init();
1364 ieee80211_regdomain_init();
1365
1366 return 0;
1367
1368 out_cleanup_pid:
1369 rc80211_pid_exit();
1370 out_cleanup_simple:
1371 rc80211_simple_exit();
1372 out:
1373 return ret;
1374 }
1375
1376 static void __exit ieee80211_exit(void)
1377 {
1378 rc80211_simple_exit();
1379 rc80211_pid_exit();
1380
1381 ieee80211_wme_unregister();
1382 ieee80211_debugfs_netdev_exit();
1383 }
1384
1385
1386 subsys_initcall(ieee80211_init);
1387 module_exit(ieee80211_exit);
1388
1389 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1390 MODULE_LICENSE("GPL");
WRT350N Kernel Patches