?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
drm: Fix authentication kernel crash
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / main.c
bloba7536fdad29d40772bd5310ada985aa05966d005
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 <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
29 #include "rate.h"
30 #include "mesh.h"
31 #include "wep.h"
32 #include "led.h"
33 #include "cfg.h"
34 #include "debugfs.h"
35
36 static struct lock_class_key ieee80211_rx_skb_queue_class;
37
38 void ieee80211_configure_filter(struct ieee80211_local *local)
39 {
40 u64 mc;
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
43
44 if (atomic_read(&local->iff_promiscs))
45 new_flags |= FIF_PROMISC_IN_BSS;
46
47 if (atomic_read(&local->iff_allmultis))
48 new_flags |= FIF_ALLMULTI;
49
50 if (local->monitors || local->scanning)
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
52
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
55
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
58
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
61
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
64
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
67
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
87 static void ieee80211_reconfig_filter(struct work_struct *work)
88 {
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
91
92 ieee80211_configure_filter(local);
93 }
94
95 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
96 {
97 struct ieee80211_channel *chan, *scan_chan;
98 int ret = 0;
99 int power;
100 enum nl80211_channel_type channel_type;
101 u32 offchannel_flag;
102
103 might_sleep();
104
105 scan_chan = local->scan_channel;
106
107 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
108 if (scan_chan) {
109 chan = scan_chan;
110 /* If scanning on oper channel, use whatever channel-type
111 * is currently in use.
112 */
113 if (chan == local->oper_channel)
114 channel_type = local->_oper_channel_type;
115 else
116 channel_type = NL80211_CHAN_NO_HT;
117 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
118 } else if (local->tmp_channel &&
119 local->oper_channel != local->tmp_channel) {
120 chan = scan_chan = local->tmp_channel;
121 channel_type = local->tmp_channel_type;
122 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
123 } else {
124 chan = local->oper_channel;
125 channel_type = local->_oper_channel_type;
126 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
127 }
128
129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
130
131 if (offchannel_flag || chan != local->hw.conf.channel ||
132 channel_type != local->hw.conf.channel_type) {
133 local->hw.conf.channel = chan;
134 local->hw.conf.channel_type = channel_type;
135 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
136 }
137
138 if (!conf_is_ht(&local->hw.conf)) {
139 /*
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
143 */
144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
145 } else if (local->hw.conf.smps_mode != local->smps_mode) {
146 local->hw.conf.smps_mode = local->smps_mode;
147 changed |= IEEE80211_CONF_CHANGE_SMPS;
148 }
149
150 if ((local->scanning & SCAN_SW_SCANNING) ||
151 (local->scanning & SCAN_HW_SCANNING))
152 power = chan->max_power;
153 else
154 power = local->power_constr_level ?
155 (chan->max_power - local->power_constr_level) :
156 chan->max_power;
157
158 if (local->user_power_level >= 0)
159 power = min(power, local->user_power_level);
160
161 if (local->hw.conf.power_level != power) {
162 changed |= IEEE80211_CONF_CHANGE_POWER;
163 local->hw.conf.power_level = power;
164 }
165
166 if (changed && local->open_count) {
167 ret = drv_config(local, changed);
168 /*
169 * Goal:
170 * HW reconfiguration should never fail, the driver has told
171 * us what it can support so it should live up to that promise.
172 *
173 * Current status:
174 * rfkill is not integrated with mac80211 and a
175 * configuration command can thus fail if hardware rfkill
176 * is enabled
177 *
178 * FIXME: integrate rfkill with mac80211 and then add this
179 * WARN_ON() back
180 *
181 */
182 /* WARN_ON(ret); */
183 }
184
185 return ret;
186 }
187
188 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
189 u32 changed)
190 {
191 struct ieee80211_local *local = sdata->local;
192 static const u8 zero[ETH_ALEN] = { 0 };
193
194 if (!changed)
195 return;
196
197 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
198 /*
199 * While not associated, claim a BSSID of all-zeroes
200 * so that drivers don't do any weird things with the
201 * BSSID at that time.
202 */
203 if (sdata->vif.bss_conf.assoc)
204 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
205 else
206 sdata->vif.bss_conf.bssid = zero;
207 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
208 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
209 else if (sdata->vif.type == NL80211_IFTYPE_AP)
210 sdata->vif.bss_conf.bssid = sdata->vif.addr;
211 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
212 sdata->vif.bss_conf.bssid = NULL;
213 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
214 sdata->vif.bss_conf.bssid = zero;
215 } else {
216 WARN_ON(1);
217 return;
218 }
219
220 switch (sdata->vif.type) {
221 case NL80211_IFTYPE_AP:
222 case NL80211_IFTYPE_ADHOC:
223 case NL80211_IFTYPE_WDS:
224 case NL80211_IFTYPE_MESH_POINT:
225 break;
226 default:
227 /* do not warn to simplify caller in scan.c */
228 changed &= ~BSS_CHANGED_BEACON_ENABLED;
229 if (WARN_ON(changed & BSS_CHANGED_BEACON))
230 return;
231 break;
232 }
233
234 if (changed & BSS_CHANGED_BEACON_ENABLED) {
235 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
236 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
237 sdata->vif.bss_conf.enable_beacon = false;
238 } else {
239 /*
240 * Beacon should be enabled, but AP mode must
241 * check whether there is a beacon configured.
242 */
243 switch (sdata->vif.type) {
244 case NL80211_IFTYPE_AP:
245 sdata->vif.bss_conf.enable_beacon =
246 !!sdata->u.ap.beacon;
247 break;
248 case NL80211_IFTYPE_ADHOC:
249 sdata->vif.bss_conf.enable_beacon =
250 !!sdata->u.ibss.presp;
251 break;
252 #ifdef CONFIG_MAC80211_MESH
253 case NL80211_IFTYPE_MESH_POINT:
254 sdata->vif.bss_conf.enable_beacon =
255 !!sdata->u.mesh.mesh_id_len;
256 break;
257 #endif
258 default:
259 /* not reached */
260 WARN_ON(1);
261 break;
262 }
263 }
264 }
265
266 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
267 }
268
269 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
270 {
271 sdata->vif.bss_conf.use_cts_prot = false;
272 sdata->vif.bss_conf.use_short_preamble = false;
273 sdata->vif.bss_conf.use_short_slot = false;
274 return BSS_CHANGED_ERP_CTS_PROT |
275 BSS_CHANGED_ERP_PREAMBLE |
276 BSS_CHANGED_ERP_SLOT;
277 }
278
279 static void ieee80211_tasklet_handler(unsigned long data)
280 {
281 struct ieee80211_local *local = (struct ieee80211_local *) data;
282 struct sta_info *sta, *tmp;
283 struct skb_eosp_msg_data *eosp_data;
284 struct sk_buff *skb;
285
286 while ((skb = skb_dequeue(&local->skb_queue)) ||
287 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
288 switch (skb->pkt_type) {
289 case IEEE80211_RX_MSG:
290 /* Clear skb->pkt_type in order to not confuse kernel
291 * netstack. */
292 skb->pkt_type = 0;
293 ieee80211_rx(local_to_hw(local), skb);
294 break;
295 case IEEE80211_TX_STATUS_MSG:
296 skb->pkt_type = 0;
297 ieee80211_tx_status(local_to_hw(local), skb);
298 break;
299 case IEEE80211_EOSP_MSG:
300 eosp_data = (void *)skb->cb;
301 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
302 /* skip wrong virtual interface */
303 if (memcmp(eosp_data->iface,
304 sta->sdata->vif.addr, ETH_ALEN))
305 continue;
306 clear_sta_flag(sta, WLAN_STA_SP);
307 break;
308 }
309 dev_kfree_skb(skb);
310 break;
311 default:
312 WARN(1, "mac80211: Packet is of unknown type %d\n",
313 skb->pkt_type);
314 dev_kfree_skb(skb);
315 break;
316 }
317 }
318 }
319
320 static void ieee80211_restart_work(struct work_struct *work)
321 {
322 struct ieee80211_local *local =
323 container_of(work, struct ieee80211_local, restart_work);
324
325 /* wait for scan work complete */
326 flush_workqueue(local->workqueue);
327
328 mutex_lock(&local->mtx);
329 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
330 local->sched_scanning,
331 "%s called with hardware scan in progress\n", __func__);
332 mutex_unlock(&local->mtx);
333
334 rtnl_lock();
335 ieee80211_scan_cancel(local);
336 ieee80211_reconfig(local);
337 rtnl_unlock();
338 }
339
340 void ieee80211_restart_hw(struct ieee80211_hw *hw)
341 {
342 struct ieee80211_local *local = hw_to_local(hw);
343
344 trace_api_restart_hw(local);
345
346 wiphy_info(hw->wiphy,
347 "Hardware restart was requested\n");
348
349 /* use this reason, ieee80211_reconfig will unblock it */
350 ieee80211_stop_queues_by_reason(hw,
351 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
352
353 schedule_work(&local->restart_work);
354 }
355 EXPORT_SYMBOL(ieee80211_restart_hw);
356
357 static void ieee80211_recalc_smps_work(struct work_struct *work)
358 {
359 struct ieee80211_local *local =
360 container_of(work, struct ieee80211_local, recalc_smps);
361
362 mutex_lock(&local->iflist_mtx);
363 ieee80211_recalc_smps(local);
364 mutex_unlock(&local->iflist_mtx);
365 }
366
367 #ifdef CONFIG_INET
368 static int ieee80211_ifa_changed(struct notifier_block *nb,
369 unsigned long data, void *arg)
370 {
371 struct in_ifaddr *ifa = arg;
372 struct ieee80211_local *local =
373 container_of(nb, struct ieee80211_local,
374 ifa_notifier);
375 struct net_device *ndev = ifa->ifa_dev->dev;
376 struct wireless_dev *wdev = ndev->ieee80211_ptr;
377 struct in_device *idev;
378 struct ieee80211_sub_if_data *sdata;
379 struct ieee80211_bss_conf *bss_conf;
380 struct ieee80211_if_managed *ifmgd;
381 int c = 0;
382
383 /* Make sure it's our interface that got changed */
384 if (!wdev)
385 return NOTIFY_DONE;
386
387 if (wdev->wiphy != local->hw.wiphy)
388 return NOTIFY_DONE;
389
390 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
391 bss_conf = &sdata->vif.bss_conf;
392
393 if (!ieee80211_sdata_running(sdata))
394 return NOTIFY_DONE;
395
396 /* ARP filtering is only supported in managed mode */
397 if (sdata->vif.type != NL80211_IFTYPE_STATION)
398 return NOTIFY_DONE;
399
400 idev = __in_dev_get_rtnl(sdata->dev);
401 if (!idev)
402 return NOTIFY_DONE;
403
404 ifmgd = &sdata->u.mgd;
405 mutex_lock(&ifmgd->mtx);
406
407 /* Copy the addresses to the bss_conf list */
408 ifa = idev->ifa_list;
409 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
410 bss_conf->arp_addr_list[c] = ifa->ifa_address;
411 ifa = ifa->ifa_next;
412 c++;
413 }
414
415 /* If not all addresses fit the list, disable filtering */
416 if (ifa) {
417 sdata->arp_filter_state = false;
418 c = 0;
419 } else {
420 sdata->arp_filter_state = true;
421 }
422 bss_conf->arp_addr_cnt = c;
423
424 /* Configure driver only if associated */
425 if (ifmgd->associated) {
426 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
427 ieee80211_bss_info_change_notify(sdata,
428 BSS_CHANGED_ARP_FILTER);
429 }
430
431 mutex_unlock(&ifmgd->mtx);
432
433 return NOTIFY_DONE;
434 }
435 #endif
436
437 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
438 {
439 struct ieee80211_local *local =
440 container_of(napi, struct ieee80211_local, napi);
441
442 return local->ops->napi_poll(&local->hw, budget);
443 }
444
445 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
446 {
447 struct ieee80211_local *local = hw_to_local(hw);
448
449 napi_schedule(&local->napi);
450 }
451 EXPORT_SYMBOL(ieee80211_napi_schedule);
452
453 void ieee80211_napi_complete(struct ieee80211_hw *hw)
454 {
455 struct ieee80211_local *local = hw_to_local(hw);
456
457 napi_complete(&local->napi);
458 }
459 EXPORT_SYMBOL(ieee80211_napi_complete);
460
461 /* There isn't a lot of sense in it, but you can transmit anything you like */
462 static const struct ieee80211_txrx_stypes
463 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
464 [NL80211_IFTYPE_ADHOC] = {
465 .tx = 0xffff,
466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
467 },
468 [NL80211_IFTYPE_STATION] = {
469 .tx = 0xffff,
470 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
472 },
473 [NL80211_IFTYPE_AP] = {
474 .tx = 0xffff,
475 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
476 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
477 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
478 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
479 BIT(IEEE80211_STYPE_AUTH >> 4) |
480 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
481 BIT(IEEE80211_STYPE_ACTION >> 4),
482 },
483 [NL80211_IFTYPE_AP_VLAN] = {
484 /* copy AP */
485 .tx = 0xffff,
486 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
487 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
488 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
489 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
490 BIT(IEEE80211_STYPE_AUTH >> 4) |
491 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
492 BIT(IEEE80211_STYPE_ACTION >> 4),
493 },
494 [NL80211_IFTYPE_P2P_CLIENT] = {
495 .tx = 0xffff,
496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
497 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
498 },
499 [NL80211_IFTYPE_P2P_GO] = {
500 .tx = 0xffff,
501 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
502 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
503 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
504 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
505 BIT(IEEE80211_STYPE_AUTH >> 4) |
506 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
507 BIT(IEEE80211_STYPE_ACTION >> 4),
508 },
509 [NL80211_IFTYPE_MESH_POINT] = {
510 .tx = 0xffff,
511 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
512 BIT(IEEE80211_STYPE_AUTH >> 4) |
513 BIT(IEEE80211_STYPE_DEAUTH >> 4),
514 },
515 };
516
517 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
518 const struct ieee80211_ops *ops)
519 {
520 struct ieee80211_local *local;
521 int priv_size, i;
522 struct wiphy *wiphy;
523
524 /* Ensure 32-byte alignment of our private data and hw private data.
525 * We use the wiphy priv data for both our ieee80211_local and for
526 * the driver's private data
527 *
528 * In memory it'll be like this:
529 *
530 * +-------------------------+
531 * | struct wiphy |
532 * +-------------------------+
533 * | struct ieee80211_local |
534 * +-------------------------+
535 * | driver's private data |
536 * +-------------------------+
537 *
538 */
539 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
540
541 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
542
543 if (!wiphy)
544 return NULL;
545
546 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
547
548 wiphy->privid = mac80211_wiphy_privid;
549
550 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
551 WIPHY_FLAG_4ADDR_AP |
552 WIPHY_FLAG_4ADDR_STATION;
553
554 if (!ops->set_key)
555 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
556
557 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
558
559 local = wiphy_priv(wiphy);
560
561 local->hw.wiphy = wiphy;
562
563 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
564
565 BUG_ON(!ops->tx);
566 BUG_ON(!ops->start);
567 BUG_ON(!ops->stop);
568 BUG_ON(!ops->config);
569 BUG_ON(!ops->add_interface);
570 BUG_ON(!ops->remove_interface);
571 BUG_ON(!ops->configure_filter);
572 local->ops = ops;
573
574 /* set up some defaults */
575 local->hw.queues = 1;
576 local->hw.max_rates = 1;
577 local->hw.max_report_rates = 0;
578 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
580 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
581 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
582 local->user_power_level = -1;
583 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
584 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
585
586 INIT_LIST_HEAD(&local->interfaces);
587
588 __hw_addr_init(&local->mc_list);
589
590 mutex_init(&local->iflist_mtx);
591 mutex_init(&local->mtx);
592
593 mutex_init(&local->key_mtx);
594 spin_lock_init(&local->filter_lock);
595 spin_lock_init(&local->queue_stop_reason_lock);
596
597 /*
598 * The rx_skb_queue is only accessed from tasklets,
599 * but other SKB queues are used from within IRQ
600 * context. Therefore, this one needs a different
601 * locking class so our direct, non-irq-safe use of
602 * the queue's lock doesn't throw lockdep warnings.
603 */
604 skb_queue_head_init_class(&local->rx_skb_queue,
605 &ieee80211_rx_skb_queue_class);
606
607 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
608
609 ieee80211_work_init(local);
610
611 INIT_WORK(&local->restart_work, ieee80211_restart_work);
612
613 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
614 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
615 local->smps_mode = IEEE80211_SMPS_OFF;
616
617 INIT_WORK(&local->dynamic_ps_enable_work,
618 ieee80211_dynamic_ps_enable_work);
619 INIT_WORK(&local->dynamic_ps_disable_work,
620 ieee80211_dynamic_ps_disable_work);
621 setup_timer(&local->dynamic_ps_timer,
622 ieee80211_dynamic_ps_timer, (unsigned long) local);
623
624 INIT_WORK(&local->sched_scan_stopped_work,
625 ieee80211_sched_scan_stopped_work);
626
627 sta_info_init(local);
628
629 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
630 skb_queue_head_init(&local->pending[i]);
631 atomic_set(&local->agg_queue_stop[i], 0);
632 }
633 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
634 (unsigned long)local);
635
636 tasklet_init(&local->tasklet,
637 ieee80211_tasklet_handler,
638 (unsigned long) local);
639
640 skb_queue_head_init(&local->skb_queue);
641 skb_queue_head_init(&local->skb_queue_unreliable);
642
643 /* init dummy netdev for use w/ NAPI */
644 init_dummy_netdev(&local->napi_dev);
645
646 ieee80211_led_names(local);
647
648 ieee80211_hw_roc_setup(local);
649
650 return local_to_hw(local);
651 }
652 EXPORT_SYMBOL(ieee80211_alloc_hw);
653
654 int ieee80211_register_hw(struct ieee80211_hw *hw)
655 {
656 struct ieee80211_local *local = hw_to_local(hw);
657 int result, i;
658 enum ieee80211_band band;
659 int channels, max_bitrates;
660 bool supp_ht;
661 static const u32 cipher_suites[] = {
662 /* keep WEP first, it may be removed below */
663 WLAN_CIPHER_SUITE_WEP40,
664 WLAN_CIPHER_SUITE_WEP104,
665 WLAN_CIPHER_SUITE_TKIP,
666 WLAN_CIPHER_SUITE_CCMP,
667
668 /* keep last -- depends on hw flags! */
669 WLAN_CIPHER_SUITE_AES_CMAC
670 };
671
672 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)
673 #ifdef CONFIG_PM
674 && (!local->ops->suspend || !local->ops->resume)
675 #endif
676 )
677 return -EINVAL;
678
679 if (hw->max_report_rates == 0)
680 hw->max_report_rates = hw->max_rates;
681
682 /*
683 * generic code guarantees at least one band,
684 * set this very early because much code assumes
685 * that hw.conf.channel is assigned
686 */
687 channels = 0;
688 max_bitrates = 0;
689 supp_ht = false;
690 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
691 struct ieee80211_supported_band *sband;
692
693 sband = local->hw.wiphy->bands[band];
694 if (!sband)
695 continue;
696 if (!local->oper_channel) {
697 /* init channel we're on */
698 local->hw.conf.channel =
699 local->oper_channel = &sband->channels[0];
700 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
701 }
702 channels += sband->n_channels;
703
704 if (max_bitrates < sband->n_bitrates)
705 max_bitrates = sband->n_bitrates;
706 supp_ht = supp_ht || sband->ht_cap.ht_supported;
707 }
708
709 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
710 sizeof(void *) * channels, GFP_KERNEL);
711 if (!local->int_scan_req)
712 return -ENOMEM;
713
714 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
715 if (!local->hw.wiphy->bands[band])
716 continue;
717 local->int_scan_req->rates[band] = (u32) -1;
718 }
719
720 /* if low-level driver supports AP, we also support VLAN */
721 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
722 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
723 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
724 }
725
726 /* mac80211 always supports monitor */
727 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
728 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
729
730 /*
731 * mac80211 doesn't support more than 1 channel, and also not more
732 * than one IBSS interface
733 */
734 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
735 const struct ieee80211_iface_combination *c;
736 int j;
737
738 c = &hw->wiphy->iface_combinations[i];
739
740 if (c->num_different_channels > 1)
741 return -EINVAL;
742
743 for (j = 0; j < c->n_limits; j++)
744 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
745 c->limits[j].max > 1)
746 return -EINVAL;
747 }
748
749 #ifndef CONFIG_MAC80211_MESH
750 /* mesh depends on Kconfig, but drivers should set it if they want */
751 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
752 #endif
753
754 /* if the underlying driver supports mesh, mac80211 will (at least)
755 * provide routing of mesh authentication frames to userspace */
756 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
757 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
758
759 /* mac80211 supports control port protocol changing */
760 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
761
762 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
763 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
764 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
765 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
766
767 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
768 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
769 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
770
771 /*
772 * Calculate scan IE length -- we need this to alloc
773 * memory and to subtract from the driver limit. It
774 * includes the DS Params, (extended) supported rates, and HT
775 * information -- SSID is the driver's responsibility.
776 */
777 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
778 3 /* DS Params */;
779 if (supp_ht)
780 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
781
782 if (!local->ops->hw_scan) {
783 /* For hw_scan, driver needs to set these up. */
784 local->hw.wiphy->max_scan_ssids = 4;
785 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
786 }
787
788 /*
789 * If the driver supports any scan IEs, then assume the
790 * limit includes the IEs mac80211 will add, otherwise
791 * leave it at zero and let the driver sort it out; we
792 * still pass our IEs to the driver but userspace will
793 * not be allowed to in that case.
794 */
795 if (local->hw.wiphy->max_scan_ie_len)
796 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
797
798 /* Set up cipher suites unless driver already did */
799 if (!local->hw.wiphy->cipher_suites) {
800 local->hw.wiphy->cipher_suites = cipher_suites;
801 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
802 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
803 local->hw.wiphy->n_cipher_suites--;
804 }
805 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
806 if (local->hw.wiphy->cipher_suites == cipher_suites) {
807 local->hw.wiphy->cipher_suites += 2;
808 local->hw.wiphy->n_cipher_suites -= 2;
809 } else {
810 u32 *suites;
811 int r, w = 0;
812
813 /* Filter out WEP */
814
815 suites = kmemdup(
816 local->hw.wiphy->cipher_suites,
817 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
818 GFP_KERNEL);
819 if (!suites)
820 return -ENOMEM;
821 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
822 u32 suite = local->hw.wiphy->cipher_suites[r];
823 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
824 suite == WLAN_CIPHER_SUITE_WEP104)
825 continue;
826 suites[w++] = suite;
827 }
828 local->hw.wiphy->cipher_suites = suites;
829 local->hw.wiphy->n_cipher_suites = w;
830 local->wiphy_ciphers_allocated = true;
831 }
832 }
833
834 if (!local->ops->remain_on_channel)
835 local->hw.wiphy->max_remain_on_channel_duration = 5000;
836
837 if (local->ops->sched_scan_start)
838 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
839
840 /* mac80211 based drivers don't support internal TDLS setup */
841 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
842 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
843
844 result = wiphy_register(local->hw.wiphy);
845 if (result < 0)
846 goto fail_wiphy_register;
847
848 /*
849 * We use the number of queues for feature tests (QoS, HT) internally
850 * so restrict them appropriately.
851 */
852 if (hw->queues > IEEE80211_MAX_QUEUES)
853 hw->queues = IEEE80211_MAX_QUEUES;
854
855 local->workqueue =
856 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
857 if (!local->workqueue) {
858 result = -ENOMEM;
859 goto fail_workqueue;
860 }
861
862 /*
863 * The hardware needs headroom for sending the frame,
864 * and we need some headroom for passing the frame to monitor
865 * interfaces, but never both at the same time.
866 */
867 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
868 IEEE80211_TX_STATUS_HEADROOM);
869
870 debugfs_hw_add(local);
871
872 /*
873 * if the driver doesn't specify a max listen interval we
874 * use 5 which should be a safe default
875 */
876 if (local->hw.max_listen_interval == 0)
877 local->hw.max_listen_interval = 5;
878
879 local->hw.conf.listen_interval = local->hw.max_listen_interval;
880
881 local->dynamic_ps_forced_timeout = -1;
882
883 result = ieee80211_wep_init(local);
884 if (result < 0)
885 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
886 result);
887
888 rtnl_lock();
889
890 result = ieee80211_init_rate_ctrl_alg(local,
891 hw->rate_control_algorithm);
892 if (result < 0) {
893 wiphy_debug(local->hw.wiphy,
894 "Failed to initialize rate control algorithm\n");
895 goto fail_rate;
896 }
897
898 /* add one default STA interface if supported */
899 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
900 result = ieee80211_if_add(local, "wlan%d", NULL,
901 NL80211_IFTYPE_STATION, NULL);
902 if (result)
903 wiphy_warn(local->hw.wiphy,
904 "Failed to add default virtual iface\n");
905 }
906
907 rtnl_unlock();
908
909 ieee80211_led_init(local);
910
911 local->network_latency_notifier.notifier_call =
912 ieee80211_max_network_latency;
913 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
914 &local->network_latency_notifier);
915 if (result) {
916 rtnl_lock();
917 goto fail_pm_qos;
918 }
919
920 #ifdef CONFIG_INET
921 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
922 result = register_inetaddr_notifier(&local->ifa_notifier);
923 if (result)
924 goto fail_ifa;
925 #endif
926
927 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
928 local->hw.napi_weight);
929
930 return 0;
931
932 #ifdef CONFIG_INET
933 fail_ifa:
934 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
935 &local->network_latency_notifier);
936 rtnl_lock();
937 #endif
938 fail_pm_qos:
939 ieee80211_led_exit(local);
940 ieee80211_remove_interfaces(local);
941 fail_rate:
942 rtnl_unlock();
943 ieee80211_wep_free(local);
944 sta_info_stop(local);
945 destroy_workqueue(local->workqueue);
946 fail_workqueue:
947 wiphy_unregister(local->hw.wiphy);
948 fail_wiphy_register:
949 if (local->wiphy_ciphers_allocated)
950 kfree(local->hw.wiphy->cipher_suites);
951 kfree(local->int_scan_req);
952 return result;
953 }
954 EXPORT_SYMBOL(ieee80211_register_hw);
955
956 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
957 {
958 struct ieee80211_local *local = hw_to_local(hw);
959
960 tasklet_kill(&local->tx_pending_tasklet);
961 tasklet_kill(&local->tasklet);
962
963 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
964 &local->network_latency_notifier);
965 #ifdef CONFIG_INET
966 unregister_inetaddr_notifier(&local->ifa_notifier);
967 #endif
968
969 rtnl_lock();
970
971 /*
972 * At this point, interface list manipulations are fine
973 * because the driver cannot be handing us frames any
974 * more and the tasklet is killed.
975 */
976 ieee80211_remove_interfaces(local);
977
978 rtnl_unlock();
979
980 /*
981 * Now all work items will be gone, but the
982 * timer might still be armed, so delete it
983 */
984 del_timer_sync(&local->work_timer);
985
986 cancel_work_sync(&local->restart_work);
987 cancel_work_sync(&local->reconfig_filter);
988
989 ieee80211_clear_tx_pending(local);
990 rate_control_deinitialize(local);
991
992 if (skb_queue_len(&local->skb_queue) ||
993 skb_queue_len(&local->skb_queue_unreliable))
994 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
995 skb_queue_purge(&local->skb_queue);
996 skb_queue_purge(&local->skb_queue_unreliable);
997 skb_queue_purge(&local->rx_skb_queue);
998
999 destroy_workqueue(local->workqueue);
1000 wiphy_unregister(local->hw.wiphy);
1001 sta_info_stop(local);
1002 ieee80211_wep_free(local);
1003 ieee80211_led_exit(local);
1004 kfree(local->int_scan_req);
1005 }
1006 EXPORT_SYMBOL(ieee80211_unregister_hw);
1007
1008 void ieee80211_free_hw(struct ieee80211_hw *hw)
1009 {
1010 struct ieee80211_local *local = hw_to_local(hw);
1011
1012 mutex_destroy(&local->iflist_mtx);
1013 mutex_destroy(&local->mtx);
1014
1015 if (local->wiphy_ciphers_allocated)
1016 kfree(local->hw.wiphy->cipher_suites);
1017
1018 wiphy_free(local->hw.wiphy);
1019 }
1020 EXPORT_SYMBOL(ieee80211_free_hw);
1021
1022 static int __init ieee80211_init(void)
1023 {
1024 struct sk_buff *skb;
1025 int ret;
1026
1027 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1028 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1029 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1030
1031 ret = rc80211_minstrel_init();
1032 if (ret)
1033 return ret;
1034
1035 ret = rc80211_minstrel_ht_init();
1036 if (ret)
1037 goto err_minstrel;
1038
1039 ret = rc80211_pid_init();
1040 if (ret)
1041 goto err_pid;
1042
1043 ret = ieee80211_iface_init();
1044 if (ret)
1045 goto err_netdev;
1046
1047 return 0;
1048 err_netdev:
1049 rc80211_pid_exit();
1050 err_pid:
1051 rc80211_minstrel_ht_exit();
1052 err_minstrel:
1053 rc80211_minstrel_exit();
1054
1055 return ret;
1056 }
1057
1058 static void __exit ieee80211_exit(void)
1059 {
1060 rc80211_pid_exit();
1061 rc80211_minstrel_ht_exit();
1062 rc80211_minstrel_exit();
1063
1064 if (mesh_allocated)
1065 ieee80211s_stop();
1066
1067 ieee80211_iface_exit();
1068
1069 rcu_barrier();
1070 }
1071
1072
1073 subsys_initcall(ieee80211_init);
1074 module_exit(ieee80211_exit);
1075
1076 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1077 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree