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ocfs2: Make the left masklogs compat.
[taoma-kernel.git] / net / mac80211 / main.c
bloba46ff06d7cb8ce9d8e31fd593555925c9aa07500
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_params.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
37 bool ieee80211_disable_40mhz_24ghz;
38 module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
39 MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
40 "Disable 40MHz support in the 2.4GHz band");
41
42 static struct lock_class_key ieee80211_rx_skb_queue_class;
43
44 void ieee80211_configure_filter(struct ieee80211_local *local)
45 {
46 u64 mc;
47 unsigned int changed_flags;
48 unsigned int new_flags = 0;
49
50 if (atomic_read(&local->iff_promiscs))
51 new_flags |= FIF_PROMISC_IN_BSS;
52
53 if (atomic_read(&local->iff_allmultis))
54 new_flags |= FIF_ALLMULTI;
55
56 if (local->monitors || local->scanning)
57 new_flags |= FIF_BCN_PRBRESP_PROMISC;
58
59 if (local->fif_probe_req || local->probe_req_reg)
60 new_flags |= FIF_PROBE_REQ;
61
62 if (local->fif_fcsfail)
63 new_flags |= FIF_FCSFAIL;
64
65 if (local->fif_plcpfail)
66 new_flags |= FIF_PLCPFAIL;
67
68 if (local->fif_control)
69 new_flags |= FIF_CONTROL;
70
71 if (local->fif_other_bss)
72 new_flags |= FIF_OTHER_BSS;
73
74 if (local->fif_pspoll)
75 new_flags |= FIF_PSPOLL;
76
77 spin_lock_bh(&local->filter_lock);
78 changed_flags = local->filter_flags ^ new_flags;
79
80 mc = drv_prepare_multicast(local, &local->mc_list);
81 spin_unlock_bh(&local->filter_lock);
82
83 /* be a bit nasty */
84 new_flags |= (1<<31);
85
86 drv_configure_filter(local, changed_flags, &new_flags, mc);
87
88 WARN_ON(new_flags & (1<<31));
89
90 local->filter_flags = new_flags & ~(1<<31);
91 }
92
93 static void ieee80211_reconfig_filter(struct work_struct *work)
94 {
95 struct ieee80211_local *local =
96 container_of(work, struct ieee80211_local, reconfig_filter);
97
98 ieee80211_configure_filter(local);
99 }
100
101 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
102 {
103 struct ieee80211_channel *chan, *scan_chan;
104 int ret = 0;
105 int power;
106 enum nl80211_channel_type channel_type;
107 u32 offchannel_flag;
108
109 might_sleep();
110
111 scan_chan = local->scan_channel;
112
113 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
114 if (scan_chan) {
115 chan = scan_chan;
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 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
129
130 if (offchannel_flag || chan != local->hw.conf.channel ||
131 channel_type != local->hw.conf.channel_type) {
132 local->hw.conf.channel = chan;
133 local->hw.conf.channel_type = channel_type;
134 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
135 }
136
137 if (!conf_is_ht(&local->hw.conf)) {
138 /*
139 * mac80211.h documents that this is only valid
140 * when the channel is set to an HT type, and
141 * that otherwise STATIC is used.
142 */
143 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
144 } else if (local->hw.conf.smps_mode != local->smps_mode) {
145 local->hw.conf.smps_mode = local->smps_mode;
146 changed |= IEEE80211_CONF_CHANGE_SMPS;
147 }
148
149 if (scan_chan)
150 power = chan->max_power;
151 else
152 power = local->power_constr_level ?
153 (chan->max_power - local->power_constr_level) :
154 chan->max_power;
155
156 if (local->user_power_level >= 0)
157 power = min(power, local->user_power_level);
158
159 if (local->hw.conf.power_level != power) {
160 changed |= IEEE80211_CONF_CHANGE_POWER;
161 local->hw.conf.power_level = power;
162 }
163
164 if (changed && local->open_count) {
165 ret = drv_config(local, changed);
166 /*
167 * Goal:
168 * HW reconfiguration should never fail, the driver has told
169 * us what it can support so it should live up to that promise.
170 *
171 * Current status:
172 * rfkill is not integrated with mac80211 and a
173 * configuration command can thus fail if hardware rfkill
174 * is enabled
175 *
176 * FIXME: integrate rfkill with mac80211 and then add this
177 * WARN_ON() back
178 *
179 */
180 /* WARN_ON(ret); */
181 }
182
183 return ret;
184 }
185
186 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
187 u32 changed)
188 {
189 struct ieee80211_local *local = sdata->local;
190 static const u8 zero[ETH_ALEN] = { 0 };
191
192 if (!changed)
193 return;
194
195 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
196 /*
197 * While not associated, claim a BSSID of all-zeroes
198 * so that drivers don't do any weird things with the
199 * BSSID at that time.
200 */
201 if (sdata->vif.bss_conf.assoc)
202 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
203 else
204 sdata->vif.bss_conf.bssid = zero;
205 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
206 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
207 else if (sdata->vif.type == NL80211_IFTYPE_AP)
208 sdata->vif.bss_conf.bssid = sdata->vif.addr;
209 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
210 sdata->vif.bss_conf.bssid = NULL;
211 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
212 sdata->vif.bss_conf.bssid = zero;
213 } else {
214 WARN_ON(1);
215 return;
216 }
217
218 switch (sdata->vif.type) {
219 case NL80211_IFTYPE_AP:
220 case NL80211_IFTYPE_ADHOC:
221 case NL80211_IFTYPE_WDS:
222 case NL80211_IFTYPE_MESH_POINT:
223 break;
224 default:
225 /* do not warn to simplify caller in scan.c */
226 changed &= ~BSS_CHANGED_BEACON_ENABLED;
227 if (WARN_ON(changed & BSS_CHANGED_BEACON))
228 return;
229 break;
230 }
231
232 if (changed & BSS_CHANGED_BEACON_ENABLED) {
233 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
234 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
235 sdata->vif.bss_conf.enable_beacon = false;
236 } else {
237 /*
238 * Beacon should be enabled, but AP mode must
239 * check whether there is a beacon configured.
240 */
241 switch (sdata->vif.type) {
242 case NL80211_IFTYPE_AP:
243 sdata->vif.bss_conf.enable_beacon =
244 !!sdata->u.ap.beacon;
245 break;
246 case NL80211_IFTYPE_ADHOC:
247 sdata->vif.bss_conf.enable_beacon =
248 !!sdata->u.ibss.presp;
249 break;
250 #ifdef CONFIG_MAC80211_MESH
251 case NL80211_IFTYPE_MESH_POINT:
252 sdata->vif.bss_conf.enable_beacon =
253 !!sdata->u.mesh.mesh_id_len;
254 break;
255 #endif
256 default:
257 /* not reached */
258 WARN_ON(1);
259 break;
260 }
261 }
262 }
263
264 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
265 }
266
267 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
268 {
269 sdata->vif.bss_conf.use_cts_prot = false;
270 sdata->vif.bss_conf.use_short_preamble = false;
271 sdata->vif.bss_conf.use_short_slot = false;
272 return BSS_CHANGED_ERP_CTS_PROT |
273 BSS_CHANGED_ERP_PREAMBLE |
274 BSS_CHANGED_ERP_SLOT;
275 }
276
277 static void ieee80211_tasklet_handler(unsigned long data)
278 {
279 struct ieee80211_local *local = (struct ieee80211_local *) data;
280 struct sk_buff *skb;
281
282 while ((skb = skb_dequeue(&local->skb_queue)) ||
283 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
284 switch (skb->pkt_type) {
285 case IEEE80211_RX_MSG:
286 /* Clear skb->pkt_type in order to not confuse kernel
287 * netstack. */
288 skb->pkt_type = 0;
289 ieee80211_rx(local_to_hw(local), skb);
290 break;
291 case IEEE80211_TX_STATUS_MSG:
292 skb->pkt_type = 0;
293 ieee80211_tx_status(local_to_hw(local), skb);
294 break;
295 default:
296 WARN(1, "mac80211: Packet is of unknown type %d\n",
297 skb->pkt_type);
298 dev_kfree_skb(skb);
299 break;
300 }
301 }
302 }
303
304 static void ieee80211_restart_work(struct work_struct *work)
305 {
306 struct ieee80211_local *local =
307 container_of(work, struct ieee80211_local, restart_work);
308
309 /* wait for scan work complete */
310 flush_workqueue(local->workqueue);
311
312 mutex_lock(&local->mtx);
313 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
314 "%s called with hardware scan in progress\n", __func__);
315 mutex_unlock(&local->mtx);
316
317 rtnl_lock();
318 ieee80211_scan_cancel(local);
319 ieee80211_reconfig(local);
320 rtnl_unlock();
321 }
322
323 void ieee80211_restart_hw(struct ieee80211_hw *hw)
324 {
325 struct ieee80211_local *local = hw_to_local(hw);
326
327 trace_api_restart_hw(local);
328
329 /* use this reason, ieee80211_reconfig will unblock it */
330 ieee80211_stop_queues_by_reason(hw,
331 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
332
333 schedule_work(&local->restart_work);
334 }
335 EXPORT_SYMBOL(ieee80211_restart_hw);
336
337 static void ieee80211_recalc_smps_work(struct work_struct *work)
338 {
339 struct ieee80211_local *local =
340 container_of(work, struct ieee80211_local, recalc_smps);
341
342 mutex_lock(&local->iflist_mtx);
343 ieee80211_recalc_smps(local);
344 mutex_unlock(&local->iflist_mtx);
345 }
346
347 #ifdef CONFIG_INET
348 static int ieee80211_ifa_changed(struct notifier_block *nb,
349 unsigned long data, void *arg)
350 {
351 struct in_ifaddr *ifa = arg;
352 struct ieee80211_local *local =
353 container_of(nb, struct ieee80211_local,
354 ifa_notifier);
355 struct net_device *ndev = ifa->ifa_dev->dev;
356 struct wireless_dev *wdev = ndev->ieee80211_ptr;
357 struct in_device *idev;
358 struct ieee80211_sub_if_data *sdata;
359 struct ieee80211_bss_conf *bss_conf;
360 struct ieee80211_if_managed *ifmgd;
361 int c = 0;
362
363 /* Make sure it's our interface that got changed */
364 if (!wdev)
365 return NOTIFY_DONE;
366
367 if (wdev->wiphy != local->hw.wiphy)
368 return NOTIFY_DONE;
369
370 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
371 bss_conf = &sdata->vif.bss_conf;
372
373 if (!ieee80211_sdata_running(sdata))
374 return NOTIFY_DONE;
375
376 /* ARP filtering is only supported in managed mode */
377 if (sdata->vif.type != NL80211_IFTYPE_STATION)
378 return NOTIFY_DONE;
379
380 idev = __in_dev_get_rtnl(sdata->dev);
381 if (!idev)
382 return NOTIFY_DONE;
383
384 ifmgd = &sdata->u.mgd;
385 mutex_lock(&ifmgd->mtx);
386
387 /* Copy the addresses to the bss_conf list */
388 ifa = idev->ifa_list;
389 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
390 bss_conf->arp_addr_list[c] = ifa->ifa_address;
391 ifa = ifa->ifa_next;
392 c++;
393 }
394
395 /* If not all addresses fit the list, disable filtering */
396 if (ifa) {
397 sdata->arp_filter_state = false;
398 c = 0;
399 } else {
400 sdata->arp_filter_state = true;
401 }
402 bss_conf->arp_addr_cnt = c;
403
404 /* Configure driver only if associated */
405 if (ifmgd->associated) {
406 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
407 ieee80211_bss_info_change_notify(sdata,
408 BSS_CHANGED_ARP_FILTER);
409 }
410
411 mutex_unlock(&ifmgd->mtx);
412
413 return NOTIFY_DONE;
414 }
415 #endif
416
417 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
418 {
419 struct ieee80211_local *local =
420 container_of(napi, struct ieee80211_local, napi);
421
422 return local->ops->napi_poll(&local->hw, budget);
423 }
424
425 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
426 {
427 struct ieee80211_local *local = hw_to_local(hw);
428
429 napi_schedule(&local->napi);
430 }
431 EXPORT_SYMBOL(ieee80211_napi_schedule);
432
433 void ieee80211_napi_complete(struct ieee80211_hw *hw)
434 {
435 struct ieee80211_local *local = hw_to_local(hw);
436
437 napi_complete(&local->napi);
438 }
439 EXPORT_SYMBOL(ieee80211_napi_complete);
440
441 /* There isn't a lot of sense in it, but you can transmit anything you like */
442 static const struct ieee80211_txrx_stypes
443 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
444 [NL80211_IFTYPE_ADHOC] = {
445 .tx = 0xffff,
446 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
447 },
448 [NL80211_IFTYPE_STATION] = {
449 .tx = 0xffff,
450 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
451 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
452 },
453 [NL80211_IFTYPE_AP] = {
454 .tx = 0xffff,
455 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
457 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
458 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
459 BIT(IEEE80211_STYPE_AUTH >> 4) |
460 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
461 BIT(IEEE80211_STYPE_ACTION >> 4),
462 },
463 [NL80211_IFTYPE_AP_VLAN] = {
464 /* copy AP */
465 .tx = 0xffff,
466 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
467 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
468 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
469 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
470 BIT(IEEE80211_STYPE_AUTH >> 4) |
471 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
472 BIT(IEEE80211_STYPE_ACTION >> 4),
473 },
474 [NL80211_IFTYPE_P2P_CLIENT] = {
475 .tx = 0xffff,
476 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
477 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
478 },
479 [NL80211_IFTYPE_P2P_GO] = {
480 .tx = 0xffff,
481 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
482 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
483 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
484 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
485 BIT(IEEE80211_STYPE_AUTH >> 4) |
486 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
487 BIT(IEEE80211_STYPE_ACTION >> 4),
488 },
489 [NL80211_IFTYPE_MESH_POINT] = {
490 .tx = 0xffff,
491 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
492 },
493 };
494
495 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
496 const struct ieee80211_ops *ops)
497 {
498 struct ieee80211_local *local;
499 int priv_size, i;
500 struct wiphy *wiphy;
501
502 /* Ensure 32-byte alignment of our private data and hw private data.
503 * We use the wiphy priv data for both our ieee80211_local and for
504 * the driver's private data
505 *
506 * In memory it'll be like this:
507 *
508 * +-------------------------+
509 * | struct wiphy |
510 * +-------------------------+
511 * | struct ieee80211_local |
512 * +-------------------------+
513 * | driver's private data |
514 * +-------------------------+
515 *
516 */
517 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
518
519 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
520
521 if (!wiphy)
522 return NULL;
523
524 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
525
526 wiphy->privid = mac80211_wiphy_privid;
527
528 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
529 WIPHY_FLAG_4ADDR_AP |
530 WIPHY_FLAG_4ADDR_STATION |
531 WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS;
532
533 if (!ops->set_key)
534 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
535
536 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
537
538 local = wiphy_priv(wiphy);
539
540 local->hw.wiphy = wiphy;
541
542 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
543
544 BUG_ON(!ops->tx);
545 BUG_ON(!ops->start);
546 BUG_ON(!ops->stop);
547 BUG_ON(!ops->config);
548 BUG_ON(!ops->add_interface);
549 BUG_ON(!ops->remove_interface);
550 BUG_ON(!ops->configure_filter);
551 local->ops = ops;
552
553 /* set up some defaults */
554 local->hw.queues = 1;
555 local->hw.max_rates = 1;
556 local->hw.max_report_rates = 0;
557 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
558 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
559 local->user_power_level = -1;
560 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
561 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
562
563 INIT_LIST_HEAD(&local->interfaces);
564
565 __hw_addr_init(&local->mc_list);
566
567 mutex_init(&local->iflist_mtx);
568 mutex_init(&local->mtx);
569
570 mutex_init(&local->key_mtx);
571 spin_lock_init(&local->filter_lock);
572 spin_lock_init(&local->queue_stop_reason_lock);
573
574 /*
575 * The rx_skb_queue is only accessed from tasklets,
576 * but other SKB queues are used from within IRQ
577 * context. Therefore, this one needs a different
578 * locking class so our direct, non-irq-safe use of
579 * the queue's lock doesn't throw lockdep warnings.
580 */
581 skb_queue_head_init_class(&local->rx_skb_queue,
582 &ieee80211_rx_skb_queue_class);
583
584 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
585
586 ieee80211_work_init(local);
587
588 INIT_WORK(&local->restart_work, ieee80211_restart_work);
589
590 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
591 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
592 local->smps_mode = IEEE80211_SMPS_OFF;
593
594 INIT_WORK(&local->dynamic_ps_enable_work,
595 ieee80211_dynamic_ps_enable_work);
596 INIT_WORK(&local->dynamic_ps_disable_work,
597 ieee80211_dynamic_ps_disable_work);
598 setup_timer(&local->dynamic_ps_timer,
599 ieee80211_dynamic_ps_timer, (unsigned long) local);
600
601 sta_info_init(local);
602
603 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
604 skb_queue_head_init(&local->pending[i]);
605 atomic_set(&local->agg_queue_stop[i], 0);
606 }
607 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
608 (unsigned long)local);
609
610 tasklet_init(&local->tasklet,
611 ieee80211_tasklet_handler,
612 (unsigned long) local);
613
614 skb_queue_head_init(&local->skb_queue);
615 skb_queue_head_init(&local->skb_queue_unreliable);
616
617 /* init dummy netdev for use w/ NAPI */
618 init_dummy_netdev(&local->napi_dev);
619
620 ieee80211_led_names(local);
621
622 ieee80211_hw_roc_setup(local);
623
624 return local_to_hw(local);
625 }
626 EXPORT_SYMBOL(ieee80211_alloc_hw);
627
628 int ieee80211_register_hw(struct ieee80211_hw *hw)
629 {
630 struct ieee80211_local *local = hw_to_local(hw);
631 int result;
632 enum ieee80211_band band;
633 int channels, max_bitrates;
634 bool supp_ht;
635 static const u32 cipher_suites[] = {
636 /* keep WEP first, it may be removed below */
637 WLAN_CIPHER_SUITE_WEP40,
638 WLAN_CIPHER_SUITE_WEP104,
639 WLAN_CIPHER_SUITE_TKIP,
640 WLAN_CIPHER_SUITE_CCMP,
641
642 /* keep last -- depends on hw flags! */
643 WLAN_CIPHER_SUITE_AES_CMAC
644 };
645
646 if (hw->max_report_rates == 0)
647 hw->max_report_rates = hw->max_rates;
648
649 /*
650 * generic code guarantees at least one band,
651 * set this very early because much code assumes
652 * that hw.conf.channel is assigned
653 */
654 channels = 0;
655 max_bitrates = 0;
656 supp_ht = false;
657 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
658 struct ieee80211_supported_band *sband;
659
660 sband = local->hw.wiphy->bands[band];
661 if (!sband)
662 continue;
663 if (!local->oper_channel) {
664 /* init channel we're on */
665 local->hw.conf.channel =
666 local->oper_channel = &sband->channels[0];
667 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
668 }
669 channels += sband->n_channels;
670
671 if (max_bitrates < sband->n_bitrates)
672 max_bitrates = sband->n_bitrates;
673 supp_ht = supp_ht || sband->ht_cap.ht_supported;
674 }
675
676 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
677 sizeof(void *) * channels, GFP_KERNEL);
678 if (!local->int_scan_req)
679 return -ENOMEM;
680
681 /* if low-level driver supports AP, we also support VLAN */
682 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
683 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
684
685 /* mac80211 always supports monitor */
686 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
687
688 #ifndef CONFIG_MAC80211_MESH
689 /* mesh depends on Kconfig, but drivers should set it if they want */
690 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
691 #endif
692
693 /* mac80211 supports control port protocol changing */
694 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
695
696 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
697 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
698 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
699 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
700
701 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
702 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
703 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
704
705 /*
706 * Calculate scan IE length -- we need this to alloc
707 * memory and to subtract from the driver limit. It
708 * includes the DS Params, (extended) supported rates, and HT
709 * information -- SSID is the driver's responsibility.
710 */
711 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
712 3 /* DS Params */;
713 if (supp_ht)
714 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
715
716 if (!local->ops->hw_scan) {
717 /* For hw_scan, driver needs to set these up. */
718 local->hw.wiphy->max_scan_ssids = 4;
719 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
720 }
721
722 /*
723 * If the driver supports any scan IEs, then assume the
724 * limit includes the IEs mac80211 will add, otherwise
725 * leave it at zero and let the driver sort it out; we
726 * still pass our IEs to the driver but userspace will
727 * not be allowed to in that case.
728 */
729 if (local->hw.wiphy->max_scan_ie_len)
730 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
731
732 /* Set up cipher suites unless driver already did */
733 if (!local->hw.wiphy->cipher_suites) {
734 local->hw.wiphy->cipher_suites = cipher_suites;
735 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
736 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
737 local->hw.wiphy->n_cipher_suites--;
738 }
739 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
740 if (local->hw.wiphy->cipher_suites == cipher_suites) {
741 local->hw.wiphy->cipher_suites += 2;
742 local->hw.wiphy->n_cipher_suites -= 2;
743 } else {
744 u32 *suites;
745 int r, w = 0;
746
747 /* Filter out WEP */
748
749 suites = kmemdup(
750 local->hw.wiphy->cipher_suites,
751 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
752 GFP_KERNEL);
753 if (!suites)
754 return -ENOMEM;
755 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
756 u32 suite = local->hw.wiphy->cipher_suites[r];
757 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
758 suite == WLAN_CIPHER_SUITE_WEP104)
759 continue;
760 suites[w++] = suite;
761 }
762 local->hw.wiphy->cipher_suites = suites;
763 local->hw.wiphy->n_cipher_suites = w;
764 local->wiphy_ciphers_allocated = true;
765 }
766 }
767
768 if (!local->ops->remain_on_channel)
769 local->hw.wiphy->max_remain_on_channel_duration = 5000;
770
771 result = wiphy_register(local->hw.wiphy);
772 if (result < 0)
773 goto fail_wiphy_register;
774
775 /*
776 * We use the number of queues for feature tests (QoS, HT) internally
777 * so restrict them appropriately.
778 */
779 if (hw->queues > IEEE80211_MAX_QUEUES)
780 hw->queues = IEEE80211_MAX_QUEUES;
781
782 local->workqueue =
783 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
784 if (!local->workqueue) {
785 result = -ENOMEM;
786 goto fail_workqueue;
787 }
788
789 /*
790 * The hardware needs headroom for sending the frame,
791 * and we need some headroom for passing the frame to monitor
792 * interfaces, but never both at the same time.
793 */
794 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
795 sizeof(struct ieee80211_tx_status_rtap_hdr));
796 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
797 sizeof(struct ieee80211_tx_status_rtap_hdr));
798
799 debugfs_hw_add(local);
800
801 /*
802 * if the driver doesn't specify a max listen interval we
803 * use 5 which should be a safe default
804 */
805 if (local->hw.max_listen_interval == 0)
806 local->hw.max_listen_interval = 5;
807
808 local->hw.conf.listen_interval = local->hw.max_listen_interval;
809
810 local->dynamic_ps_forced_timeout = -1;
811
812 result = sta_info_start(local);
813 if (result < 0)
814 goto fail_sta_info;
815
816 result = ieee80211_wep_init(local);
817 if (result < 0)
818 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
819 result);
820
821 rtnl_lock();
822
823 result = ieee80211_init_rate_ctrl_alg(local,
824 hw->rate_control_algorithm);
825 if (result < 0) {
826 wiphy_debug(local->hw.wiphy,
827 "Failed to initialize rate control algorithm\n");
828 goto fail_rate;
829 }
830
831 /* add one default STA interface if supported */
832 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
833 result = ieee80211_if_add(local, "wlan%d", NULL,
834 NL80211_IFTYPE_STATION, NULL);
835 if (result)
836 wiphy_warn(local->hw.wiphy,
837 "Failed to add default virtual iface\n");
838 }
839
840 rtnl_unlock();
841
842 ieee80211_led_init(local);
843
844 local->network_latency_notifier.notifier_call =
845 ieee80211_max_network_latency;
846 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
847 &local->network_latency_notifier);
848 if (result) {
849 rtnl_lock();
850 goto fail_pm_qos;
851 }
852
853 #ifdef CONFIG_INET
854 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
855 result = register_inetaddr_notifier(&local->ifa_notifier);
856 if (result)
857 goto fail_ifa;
858 #endif
859
860 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
861 local->hw.napi_weight);
862
863 return 0;
864
865 #ifdef CONFIG_INET
866 fail_ifa:
867 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
868 &local->network_latency_notifier);
869 rtnl_lock();
870 #endif
871 fail_pm_qos:
872 ieee80211_led_exit(local);
873 ieee80211_remove_interfaces(local);
874 fail_rate:
875 rtnl_unlock();
876 ieee80211_wep_free(local);
877 sta_info_stop(local);
878 fail_sta_info:
879 destroy_workqueue(local->workqueue);
880 fail_workqueue:
881 wiphy_unregister(local->hw.wiphy);
882 fail_wiphy_register:
883 if (local->wiphy_ciphers_allocated)
884 kfree(local->hw.wiphy->cipher_suites);
885 kfree(local->int_scan_req);
886 return result;
887 }
888 EXPORT_SYMBOL(ieee80211_register_hw);
889
890 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
891 {
892 struct ieee80211_local *local = hw_to_local(hw);
893
894 tasklet_kill(&local->tx_pending_tasklet);
895 tasklet_kill(&local->tasklet);
896
897 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
898 &local->network_latency_notifier);
899 #ifdef CONFIG_INET
900 unregister_inetaddr_notifier(&local->ifa_notifier);
901 #endif
902
903 rtnl_lock();
904
905 /*
906 * At this point, interface list manipulations are fine
907 * because the driver cannot be handing us frames any
908 * more and the tasklet is killed.
909 */
910 ieee80211_remove_interfaces(local);
911
912 rtnl_unlock();
913
914 /*
915 * Now all work items will be gone, but the
916 * timer might still be armed, so delete it
917 */
918 del_timer_sync(&local->work_timer);
919
920 cancel_work_sync(&local->restart_work);
921 cancel_work_sync(&local->reconfig_filter);
922
923 ieee80211_clear_tx_pending(local);
924 sta_info_stop(local);
925 rate_control_deinitialize(local);
926
927 if (skb_queue_len(&local->skb_queue) ||
928 skb_queue_len(&local->skb_queue_unreliable))
929 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
930 skb_queue_purge(&local->skb_queue);
931 skb_queue_purge(&local->skb_queue_unreliable);
932 skb_queue_purge(&local->rx_skb_queue);
933
934 destroy_workqueue(local->workqueue);
935 wiphy_unregister(local->hw.wiphy);
936 ieee80211_wep_free(local);
937 ieee80211_led_exit(local);
938 kfree(local->int_scan_req);
939 }
940 EXPORT_SYMBOL(ieee80211_unregister_hw);
941
942 void ieee80211_free_hw(struct ieee80211_hw *hw)
943 {
944 struct ieee80211_local *local = hw_to_local(hw);
945
946 mutex_destroy(&local->iflist_mtx);
947 mutex_destroy(&local->mtx);
948
949 if (local->wiphy_ciphers_allocated)
950 kfree(local->hw.wiphy->cipher_suites);
951
952 wiphy_free(local->hw.wiphy);
953 }
954 EXPORT_SYMBOL(ieee80211_free_hw);
955
956 static int __init ieee80211_init(void)
957 {
958 struct sk_buff *skb;
959 int ret;
960
961 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
962 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
963 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
964
965 ret = rc80211_minstrel_init();
966 if (ret)
967 return ret;
968
969 ret = rc80211_minstrel_ht_init();
970 if (ret)
971 goto err_minstrel;
972
973 ret = rc80211_pid_init();
974 if (ret)
975 goto err_pid;
976
977 ret = ieee80211_iface_init();
978 if (ret)
979 goto err_netdev;
980
981 return 0;
982 err_netdev:
983 rc80211_pid_exit();
984 err_pid:
985 rc80211_minstrel_ht_exit();
986 err_minstrel:
987 rc80211_minstrel_exit();
988
989 return ret;
990 }
991
992 static void __exit ieee80211_exit(void)
993 {
994 rc80211_pid_exit();
995 rc80211_minstrel_ht_exit();
996 rc80211_minstrel_exit();
997
998 if (mesh_allocated)
999 ieee80211s_stop();
1000
1001 ieee80211_iface_exit();
1002 }
1003
1004
1005 subsys_initcall(ieee80211_init);
1006 module_exit(ieee80211_exit);
1007
1008 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1009 MODULE_LICENSE("GPL");
The kernel tree for Tao Ma.