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x86, mrst: Check platform_device_register() return code
[linux-2.6/next.git] / net / mac80211 / main.c
blob107a0cbe52acc5380a0eed9887853c582d61f44a
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 void ieee80211_configure_filter(struct ieee80211_local *local)
43 {
44 u64 mc;
45 unsigned int changed_flags;
46 unsigned int new_flags = 0;
47
48 if (atomic_read(&local->iff_promiscs))
49 new_flags |= FIF_PROMISC_IN_BSS;
50
51 if (atomic_read(&local->iff_allmultis))
52 new_flags |= FIF_ALLMULTI;
53
54 if (local->monitors || local->scanning)
55 new_flags |= FIF_BCN_PRBRESP_PROMISC;
56
57 if (local->fif_probe_req || local->probe_req_reg)
58 new_flags |= FIF_PROBE_REQ;
59
60 if (local->fif_fcsfail)
61 new_flags |= FIF_FCSFAIL;
62
63 if (local->fif_plcpfail)
64 new_flags |= FIF_PLCPFAIL;
65
66 if (local->fif_control)
67 new_flags |= FIF_CONTROL;
68
69 if (local->fif_other_bss)
70 new_flags |= FIF_OTHER_BSS;
71
72 if (local->fif_pspoll)
73 new_flags |= FIF_PSPOLL;
74
75 spin_lock_bh(&local->filter_lock);
76 changed_flags = local->filter_flags ^ new_flags;
77
78 mc = drv_prepare_multicast(local, &local->mc_list);
79 spin_unlock_bh(&local->filter_lock);
80
81 /* be a bit nasty */
82 new_flags |= (1<<31);
83
84 drv_configure_filter(local, changed_flags, &new_flags, mc);
85
86 WARN_ON(new_flags & (1<<31));
87
88 local->filter_flags = new_flags & ~(1<<31);
89 }
90
91 static void ieee80211_reconfig_filter(struct work_struct *work)
92 {
93 struct ieee80211_local *local =
94 container_of(work, struct ieee80211_local, reconfig_filter);
95
96 ieee80211_configure_filter(local);
97 }
98
99 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
100 {
101 struct ieee80211_channel *chan, *scan_chan;
102 int ret = 0;
103 int power;
104 enum nl80211_channel_type channel_type;
105 u32 offchannel_flag;
106
107 might_sleep();
108
109 scan_chan = local->scan_channel;
110
111 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
112 if (scan_chan) {
113 chan = scan_chan;
114 channel_type = NL80211_CHAN_NO_HT;
115 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
116 } else if (local->tmp_channel &&
117 local->oper_channel != local->tmp_channel) {
118 chan = scan_chan = local->tmp_channel;
119 channel_type = local->tmp_channel_type;
120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
121 } else {
122 chan = local->oper_channel;
123 channel_type = local->_oper_channel_type;
124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
125 }
126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
127
128 if (offchannel_flag || chan != local->hw.conf.channel ||
129 channel_type != local->hw.conf.channel_type) {
130 local->hw.conf.channel = chan;
131 local->hw.conf.channel_type = channel_type;
132 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
133 }
134
135 if (!conf_is_ht(&local->hw.conf)) {
136 /*
137 * mac80211.h documents that this is only valid
138 * when the channel is set to an HT type, and
139 * that otherwise STATIC is used.
140 */
141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
142 } else if (local->hw.conf.smps_mode != local->smps_mode) {
143 local->hw.conf.smps_mode = local->smps_mode;
144 changed |= IEEE80211_CONF_CHANGE_SMPS;
145 }
146
147 if (scan_chan)
148 power = chan->max_power;
149 else
150 power = local->power_constr_level ?
151 (chan->max_power - local->power_constr_level) :
152 chan->max_power;
153
154 if (local->user_power_level >= 0)
155 power = min(power, local->user_power_level);
156
157 if (local->hw.conf.power_level != power) {
158 changed |= IEEE80211_CONF_CHANGE_POWER;
159 local->hw.conf.power_level = power;
160 }
161
162 if (changed && local->open_count) {
163 ret = drv_config(local, changed);
164 /*
165 * Goal:
166 * HW reconfiguration should never fail, the driver has told
167 * us what it can support so it should live up to that promise.
168 *
169 * Current status:
170 * rfkill is not integrated with mac80211 and a
171 * configuration command can thus fail if hardware rfkill
172 * is enabled
173 *
174 * FIXME: integrate rfkill with mac80211 and then add this
175 * WARN_ON() back
176 *
177 */
178 /* WARN_ON(ret); */
179 }
180
181 return ret;
182 }
183
184 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
185 u32 changed)
186 {
187 struct ieee80211_local *local = sdata->local;
188 static const u8 zero[ETH_ALEN] = { 0 };
189
190 if (!changed)
191 return;
192
193 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
194 /*
195 * While not associated, claim a BSSID of all-zeroes
196 * so that drivers don't do any weird things with the
197 * BSSID at that time.
198 */
199 if (sdata->vif.bss_conf.assoc)
200 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
201 else
202 sdata->vif.bss_conf.bssid = zero;
203 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
204 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
205 else if (sdata->vif.type == NL80211_IFTYPE_AP)
206 sdata->vif.bss_conf.bssid = sdata->vif.addr;
207 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
208 sdata->vif.bss_conf.bssid = NULL;
209 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
210 sdata->vif.bss_conf.bssid = zero;
211 } else {
212 WARN_ON(1);
213 return;
214 }
215
216 switch (sdata->vif.type) {
217 case NL80211_IFTYPE_AP:
218 case NL80211_IFTYPE_ADHOC:
219 case NL80211_IFTYPE_WDS:
220 case NL80211_IFTYPE_MESH_POINT:
221 break;
222 default:
223 /* do not warn to simplify caller in scan.c */
224 changed &= ~BSS_CHANGED_BEACON_ENABLED;
225 if (WARN_ON(changed & BSS_CHANGED_BEACON))
226 return;
227 break;
228 }
229
230 if (changed & BSS_CHANGED_BEACON_ENABLED) {
231 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
232 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
233 sdata->vif.bss_conf.enable_beacon = false;
234 } else {
235 /*
236 * Beacon should be enabled, but AP mode must
237 * check whether there is a beacon configured.
238 */
239 switch (sdata->vif.type) {
240 case NL80211_IFTYPE_AP:
241 sdata->vif.bss_conf.enable_beacon =
242 !!sdata->u.ap.beacon;
243 break;
244 case NL80211_IFTYPE_ADHOC:
245 sdata->vif.bss_conf.enable_beacon =
246 !!sdata->u.ibss.presp;
247 break;
248 case NL80211_IFTYPE_MESH_POINT:
249 sdata->vif.bss_conf.enable_beacon = true;
250 break;
251 default:
252 /* not reached */
253 WARN_ON(1);
254 break;
255 }
256 }
257 }
258
259 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
260 }
261
262 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
263 {
264 sdata->vif.bss_conf.use_cts_prot = false;
265 sdata->vif.bss_conf.use_short_preamble = false;
266 sdata->vif.bss_conf.use_short_slot = false;
267 return BSS_CHANGED_ERP_CTS_PROT |
268 BSS_CHANGED_ERP_PREAMBLE |
269 BSS_CHANGED_ERP_SLOT;
270 }
271
272 static void ieee80211_tasklet_handler(unsigned long data)
273 {
274 struct ieee80211_local *local = (struct ieee80211_local *) data;
275 struct sk_buff *skb;
276
277 while ((skb = skb_dequeue(&local->skb_queue)) ||
278 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
279 switch (skb->pkt_type) {
280 case IEEE80211_RX_MSG:
281 /* Clear skb->pkt_type in order to not confuse kernel
282 * netstack. */
283 skb->pkt_type = 0;
284 ieee80211_rx(local_to_hw(local), skb);
285 break;
286 case IEEE80211_TX_STATUS_MSG:
287 skb->pkt_type = 0;
288 ieee80211_tx_status(local_to_hw(local), skb);
289 break;
290 default:
291 WARN(1, "mac80211: Packet is of unknown type %d\n",
292 skb->pkt_type);
293 dev_kfree_skb(skb);
294 break;
295 }
296 }
297 }
298
299 static void ieee80211_restart_work(struct work_struct *work)
300 {
301 struct ieee80211_local *local =
302 container_of(work, struct ieee80211_local, restart_work);
303
304 /* wait for scan work complete */
305 flush_workqueue(local->workqueue);
306
307 mutex_lock(&local->mtx);
308 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
309 "%s called with hardware scan in progress\n", __func__);
310 mutex_unlock(&local->mtx);
311
312 rtnl_lock();
313 ieee80211_scan_cancel(local);
314 ieee80211_reconfig(local);
315 rtnl_unlock();
316 }
317
318 void ieee80211_restart_hw(struct ieee80211_hw *hw)
319 {
320 struct ieee80211_local *local = hw_to_local(hw);
321
322 trace_api_restart_hw(local);
323
324 /* use this reason, ieee80211_reconfig will unblock it */
325 ieee80211_stop_queues_by_reason(hw,
326 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
327
328 schedule_work(&local->restart_work);
329 }
330 EXPORT_SYMBOL(ieee80211_restart_hw);
331
332 static void ieee80211_recalc_smps_work(struct work_struct *work)
333 {
334 struct ieee80211_local *local =
335 container_of(work, struct ieee80211_local, recalc_smps);
336
337 mutex_lock(&local->iflist_mtx);
338 ieee80211_recalc_smps(local);
339 mutex_unlock(&local->iflist_mtx);
340 }
341
342 #ifdef CONFIG_INET
343 static int ieee80211_ifa_changed(struct notifier_block *nb,
344 unsigned long data, void *arg)
345 {
346 struct in_ifaddr *ifa = arg;
347 struct ieee80211_local *local =
348 container_of(nb, struct ieee80211_local,
349 ifa_notifier);
350 struct net_device *ndev = ifa->ifa_dev->dev;
351 struct wireless_dev *wdev = ndev->ieee80211_ptr;
352 struct in_device *idev;
353 struct ieee80211_sub_if_data *sdata;
354 struct ieee80211_bss_conf *bss_conf;
355 struct ieee80211_if_managed *ifmgd;
356 int c = 0;
357
358 /* Make sure it's our interface that got changed */
359 if (!wdev)
360 return NOTIFY_DONE;
361
362 if (wdev->wiphy != local->hw.wiphy)
363 return NOTIFY_DONE;
364
365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366 bss_conf = &sdata->vif.bss_conf;
367
368 if (!ieee80211_sdata_running(sdata))
369 return NOTIFY_DONE;
370
371 /* ARP filtering is only supported in managed mode */
372 if (sdata->vif.type != NL80211_IFTYPE_STATION)
373 return NOTIFY_DONE;
374
375 idev = __in_dev_get_rtnl(sdata->dev);
376 if (!idev)
377 return NOTIFY_DONE;
378
379 ifmgd = &sdata->u.mgd;
380 mutex_lock(&ifmgd->mtx);
381
382 /* Copy the addresses to the bss_conf list */
383 ifa = idev->ifa_list;
384 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
385 bss_conf->arp_addr_list[c] = ifa->ifa_address;
386 ifa = ifa->ifa_next;
387 c++;
388 }
389
390 /* If not all addresses fit the list, disable filtering */
391 if (ifa) {
392 sdata->arp_filter_state = false;
393 c = 0;
394 } else {
395 sdata->arp_filter_state = true;
396 }
397 bss_conf->arp_addr_cnt = c;
398
399 /* Configure driver only if associated */
400 if (ifmgd->associated) {
401 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
402 ieee80211_bss_info_change_notify(sdata,
403 BSS_CHANGED_ARP_FILTER);
404 }
405
406 mutex_unlock(&ifmgd->mtx);
407
408 return NOTIFY_DONE;
409 }
410 #endif
411
412 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
413 {
414 struct ieee80211_local *local =
415 container_of(napi, struct ieee80211_local, napi);
416
417 return local->ops->napi_poll(&local->hw, budget);
418 }
419
420 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
421 {
422 struct ieee80211_local *local = hw_to_local(hw);
423
424 napi_schedule(&local->napi);
425 }
426 EXPORT_SYMBOL(ieee80211_napi_schedule);
427
428 void ieee80211_napi_complete(struct ieee80211_hw *hw)
429 {
430 struct ieee80211_local *local = hw_to_local(hw);
431
432 napi_complete(&local->napi);
433 }
434 EXPORT_SYMBOL(ieee80211_napi_complete);
435
436 /* There isn't a lot of sense in it, but you can transmit anything you like */
437 static const struct ieee80211_txrx_stypes
438 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
439 [NL80211_IFTYPE_ADHOC] = {
440 .tx = 0xffff,
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
442 },
443 [NL80211_IFTYPE_STATION] = {
444 .tx = 0xffff,
445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
447 },
448 [NL80211_IFTYPE_AP] = {
449 .tx = 0xffff,
450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
453 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
454 BIT(IEEE80211_STYPE_AUTH >> 4) |
455 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
456 BIT(IEEE80211_STYPE_ACTION >> 4),
457 },
458 [NL80211_IFTYPE_AP_VLAN] = {
459 /* copy AP */
460 .tx = 0xffff,
461 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
462 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
463 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
464 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
465 BIT(IEEE80211_STYPE_AUTH >> 4) |
466 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
467 BIT(IEEE80211_STYPE_ACTION >> 4),
468 },
469 [NL80211_IFTYPE_P2P_CLIENT] = {
470 .tx = 0xffff,
471 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
473 },
474 [NL80211_IFTYPE_P2P_GO] = {
475 .tx = 0xffff,
476 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
477 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
478 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
479 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
480 BIT(IEEE80211_STYPE_AUTH >> 4) |
481 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
482 BIT(IEEE80211_STYPE_ACTION >> 4),
483 },
484 };
485
486 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
487 const struct ieee80211_ops *ops)
488 {
489 struct ieee80211_local *local;
490 int priv_size, i;
491 struct wiphy *wiphy;
492
493 /* Ensure 32-byte alignment of our private data and hw private data.
494 * We use the wiphy priv data for both our ieee80211_local and for
495 * the driver's private data
496 *
497 * In memory it'll be like this:
498 *
499 * +-------------------------+
500 * | struct wiphy |
501 * +-------------------------+
502 * | struct ieee80211_local |
503 * +-------------------------+
504 * | driver's private data |
505 * +-------------------------+
506 *
507 */
508 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
509
510 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
511
512 if (!wiphy)
513 return NULL;
514
515 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
516
517 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
518 WIPHY_FLAG_4ADDR_AP |
519 WIPHY_FLAG_4ADDR_STATION;
520 wiphy->privid = mac80211_wiphy_privid;
521
522 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
523
524 local = wiphy_priv(wiphy);
525
526 local->hw.wiphy = wiphy;
527
528 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
529
530 BUG_ON(!ops->tx);
531 BUG_ON(!ops->start);
532 BUG_ON(!ops->stop);
533 BUG_ON(!ops->config);
534 BUG_ON(!ops->add_interface);
535 BUG_ON(!ops->remove_interface);
536 BUG_ON(!ops->configure_filter);
537 local->ops = ops;
538
539 /* set up some defaults */
540 local->hw.queues = 1;
541 local->hw.max_rates = 1;
542 local->hw.max_report_rates = 0;
543 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
544 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
545 local->user_power_level = -1;
546 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
547 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
548
549 INIT_LIST_HEAD(&local->interfaces);
550
551 __hw_addr_init(&local->mc_list);
552
553 mutex_init(&local->iflist_mtx);
554 mutex_init(&local->mtx);
555
556 mutex_init(&local->key_mtx);
557 spin_lock_init(&local->filter_lock);
558 spin_lock_init(&local->queue_stop_reason_lock);
559
560 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
561
562 ieee80211_work_init(local);
563
564 INIT_WORK(&local->restart_work, ieee80211_restart_work);
565
566 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
567 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
568 local->smps_mode = IEEE80211_SMPS_OFF;
569
570 INIT_WORK(&local->dynamic_ps_enable_work,
571 ieee80211_dynamic_ps_enable_work);
572 INIT_WORK(&local->dynamic_ps_disable_work,
573 ieee80211_dynamic_ps_disable_work);
574 setup_timer(&local->dynamic_ps_timer,
575 ieee80211_dynamic_ps_timer, (unsigned long) local);
576
577 sta_info_init(local);
578
579 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
580 skb_queue_head_init(&local->pending[i]);
581 atomic_set(&local->agg_queue_stop[i], 0);
582 }
583 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
584 (unsigned long)local);
585
586 tasklet_init(&local->tasklet,
587 ieee80211_tasklet_handler,
588 (unsigned long) local);
589
590 skb_queue_head_init(&local->skb_queue);
591 skb_queue_head_init(&local->skb_queue_unreliable);
592
593 /* init dummy netdev for use w/ NAPI */
594 init_dummy_netdev(&local->napi_dev);
595
596 return local_to_hw(local);
597 }
598 EXPORT_SYMBOL(ieee80211_alloc_hw);
599
600 int ieee80211_register_hw(struct ieee80211_hw *hw)
601 {
602 struct ieee80211_local *local = hw_to_local(hw);
603 int result;
604 enum ieee80211_band band;
605 int channels, max_bitrates;
606 bool supp_ht;
607 static const u32 cipher_suites[] = {
608 /* keep WEP first, it may be removed below */
609 WLAN_CIPHER_SUITE_WEP40,
610 WLAN_CIPHER_SUITE_WEP104,
611 WLAN_CIPHER_SUITE_TKIP,
612 WLAN_CIPHER_SUITE_CCMP,
613
614 /* keep last -- depends on hw flags! */
615 WLAN_CIPHER_SUITE_AES_CMAC
616 };
617
618 if (hw->max_report_rates == 0)
619 hw->max_report_rates = hw->max_rates;
620
621 /*
622 * generic code guarantees at least one band,
623 * set this very early because much code assumes
624 * that hw.conf.channel is assigned
625 */
626 channels = 0;
627 max_bitrates = 0;
628 supp_ht = false;
629 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
630 struct ieee80211_supported_band *sband;
631
632 sband = local->hw.wiphy->bands[band];
633 if (!sband)
634 continue;
635 if (!local->oper_channel) {
636 /* init channel we're on */
637 local->hw.conf.channel =
638 local->oper_channel = &sband->channels[0];
639 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
640 }
641 channels += sband->n_channels;
642
643 if (max_bitrates < sband->n_bitrates)
644 max_bitrates = sband->n_bitrates;
645 supp_ht = supp_ht || sband->ht_cap.ht_supported;
646 }
647
648 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
649 sizeof(void *) * channels, GFP_KERNEL);
650 if (!local->int_scan_req)
651 return -ENOMEM;
652
653 /* if low-level driver supports AP, we also support VLAN */
654 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
655 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
656
657 /* mac80211 always supports monitor */
658 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
659
660 #ifndef CONFIG_MAC80211_MESH
661 /* mesh depends on Kconfig, but drivers should set it if they want */
662 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
663 #endif
664
665 /* mac80211 supports control port protocol changing */
666 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
667
668 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
669 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
670 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
671 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
672
673 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
674 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
675 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
676
677 /*
678 * Calculate scan IE length -- we need this to alloc
679 * memory and to subtract from the driver limit. It
680 * includes the DS Params, (extended) supported rates, and HT
681 * information -- SSID is the driver's responsibility.
682 */
683 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
684 3 /* DS Params */;
685 if (supp_ht)
686 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
687
688 if (!local->ops->hw_scan) {
689 /* For hw_scan, driver needs to set these up. */
690 local->hw.wiphy->max_scan_ssids = 4;
691 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
692 }
693
694 /*
695 * If the driver supports any scan IEs, then assume the
696 * limit includes the IEs mac80211 will add, otherwise
697 * leave it at zero and let the driver sort it out; we
698 * still pass our IEs to the driver but userspace will
699 * not be allowed to in that case.
700 */
701 if (local->hw.wiphy->max_scan_ie_len)
702 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
703
704 /* Set up cipher suites unless driver already did */
705 if (!local->hw.wiphy->cipher_suites) {
706 local->hw.wiphy->cipher_suites = cipher_suites;
707 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
708 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
709 local->hw.wiphy->n_cipher_suites--;
710 }
711 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
712 if (local->hw.wiphy->cipher_suites == cipher_suites) {
713 local->hw.wiphy->cipher_suites += 2;
714 local->hw.wiphy->n_cipher_suites -= 2;
715 } else {
716 u32 *suites;
717 int r, w = 0;
718
719 /* Filter out WEP */
720
721 suites = kmemdup(
722 local->hw.wiphy->cipher_suites,
723 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
724 GFP_KERNEL);
725 if (!suites)
726 return -ENOMEM;
727 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
728 u32 suite = local->hw.wiphy->cipher_suites[r];
729 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
730 suite == WLAN_CIPHER_SUITE_WEP104)
731 continue;
732 suites[w++] = suite;
733 }
734 local->hw.wiphy->cipher_suites = suites;
735 local->hw.wiphy->n_cipher_suites = w;
736 local->wiphy_ciphers_allocated = true;
737 }
738 }
739
740 result = wiphy_register(local->hw.wiphy);
741 if (result < 0)
742 goto fail_wiphy_register;
743
744 /*
745 * We use the number of queues for feature tests (QoS, HT) internally
746 * so restrict them appropriately.
747 */
748 if (hw->queues > IEEE80211_MAX_QUEUES)
749 hw->queues = IEEE80211_MAX_QUEUES;
750
751 local->workqueue =
752 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
753 if (!local->workqueue) {
754 result = -ENOMEM;
755 goto fail_workqueue;
756 }
757
758 /*
759 * The hardware needs headroom for sending the frame,
760 * and we need some headroom for passing the frame to monitor
761 * interfaces, but never both at the same time.
762 */
763 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
764 sizeof(struct ieee80211_tx_status_rtap_hdr));
765 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
766 sizeof(struct ieee80211_tx_status_rtap_hdr));
767
768 debugfs_hw_add(local);
769
770 /*
771 * if the driver doesn't specify a max listen interval we
772 * use 5 which should be a safe default
773 */
774 if (local->hw.max_listen_interval == 0)
775 local->hw.max_listen_interval = 5;
776
777 local->hw.conf.listen_interval = local->hw.max_listen_interval;
778
779 local->dynamic_ps_forced_timeout = -1;
780
781 result = sta_info_start(local);
782 if (result < 0)
783 goto fail_sta_info;
784
785 result = ieee80211_wep_init(local);
786 if (result < 0)
787 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
788 result);
789
790 rtnl_lock();
791
792 result = ieee80211_init_rate_ctrl_alg(local,
793 hw->rate_control_algorithm);
794 if (result < 0) {
795 wiphy_debug(local->hw.wiphy,
796 "Failed to initialize rate control algorithm\n");
797 goto fail_rate;
798 }
799
800 /* add one default STA interface if supported */
801 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
802 result = ieee80211_if_add(local, "wlan%d", NULL,
803 NL80211_IFTYPE_STATION, NULL);
804 if (result)
805 wiphy_warn(local->hw.wiphy,
806 "Failed to add default virtual iface\n");
807 }
808
809 rtnl_unlock();
810
811 ieee80211_led_init(local);
812
813 local->network_latency_notifier.notifier_call =
814 ieee80211_max_network_latency;
815 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
816 &local->network_latency_notifier);
817 if (result) {
818 rtnl_lock();
819 goto fail_pm_qos;
820 }
821
822 #ifdef CONFIG_INET
823 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
824 result = register_inetaddr_notifier(&local->ifa_notifier);
825 if (result)
826 goto fail_ifa;
827 #endif
828
829 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
830 local->hw.napi_weight);
831
832 return 0;
833
834 #ifdef CONFIG_INET
835 fail_ifa:
836 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
837 &local->network_latency_notifier);
838 rtnl_lock();
839 #endif
840 fail_pm_qos:
841 ieee80211_led_exit(local);
842 ieee80211_remove_interfaces(local);
843 fail_rate:
844 rtnl_unlock();
845 ieee80211_wep_free(local);
846 sta_info_stop(local);
847 fail_sta_info:
848 destroy_workqueue(local->workqueue);
849 fail_workqueue:
850 wiphy_unregister(local->hw.wiphy);
851 fail_wiphy_register:
852 if (local->wiphy_ciphers_allocated)
853 kfree(local->hw.wiphy->cipher_suites);
854 kfree(local->int_scan_req);
855 return result;
856 }
857 EXPORT_SYMBOL(ieee80211_register_hw);
858
859 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
860 {
861 struct ieee80211_local *local = hw_to_local(hw);
862
863 tasklet_kill(&local->tx_pending_tasklet);
864 tasklet_kill(&local->tasklet);
865
866 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
867 &local->network_latency_notifier);
868 #ifdef CONFIG_INET
869 unregister_inetaddr_notifier(&local->ifa_notifier);
870 #endif
871
872 rtnl_lock();
873
874 /*
875 * At this point, interface list manipulations are fine
876 * because the driver cannot be handing us frames any
877 * more and the tasklet is killed.
878 */
879 ieee80211_remove_interfaces(local);
880
881 rtnl_unlock();
882
883 /*
884 * Now all work items will be gone, but the
885 * timer might still be armed, so delete it
886 */
887 del_timer_sync(&local->work_timer);
888
889 cancel_work_sync(&local->restart_work);
890 cancel_work_sync(&local->reconfig_filter);
891
892 ieee80211_clear_tx_pending(local);
893 sta_info_stop(local);
894 rate_control_deinitialize(local);
895
896 if (skb_queue_len(&local->skb_queue) ||
897 skb_queue_len(&local->skb_queue_unreliable))
898 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
899 skb_queue_purge(&local->skb_queue);
900 skb_queue_purge(&local->skb_queue_unreliable);
901
902 destroy_workqueue(local->workqueue);
903 wiphy_unregister(local->hw.wiphy);
904 ieee80211_wep_free(local);
905 ieee80211_led_exit(local);
906 kfree(local->int_scan_req);
907 }
908 EXPORT_SYMBOL(ieee80211_unregister_hw);
909
910 void ieee80211_free_hw(struct ieee80211_hw *hw)
911 {
912 struct ieee80211_local *local = hw_to_local(hw);
913
914 mutex_destroy(&local->iflist_mtx);
915 mutex_destroy(&local->mtx);
916
917 if (local->wiphy_ciphers_allocated)
918 kfree(local->hw.wiphy->cipher_suites);
919
920 wiphy_free(local->hw.wiphy);
921 }
922 EXPORT_SYMBOL(ieee80211_free_hw);
923
924 static int __init ieee80211_init(void)
925 {
926 struct sk_buff *skb;
927 int ret;
928
929 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
930 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
931 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
932
933 ret = rc80211_minstrel_init();
934 if (ret)
935 return ret;
936
937 ret = rc80211_minstrel_ht_init();
938 if (ret)
939 goto err_minstrel;
940
941 ret = rc80211_pid_init();
942 if (ret)
943 goto err_pid;
944
945 ret = ieee80211_iface_init();
946 if (ret)
947 goto err_netdev;
948
949 return 0;
950 err_netdev:
951 rc80211_pid_exit();
952 err_pid:
953 rc80211_minstrel_ht_exit();
954 err_minstrel:
955 rc80211_minstrel_exit();
956
957 return ret;
958 }
959
960 static void __exit ieee80211_exit(void)
961 {
962 rc80211_pid_exit();
963 rc80211_minstrel_ht_exit();
964 rc80211_minstrel_exit();
965
966 if (mesh_allocated)
967 ieee80211s_stop();
968
969 ieee80211_iface_exit();
970 }
971
972
973 subsys_initcall(ieee80211_init);
974 module_exit(ieee80211_exit);
975
976 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
977 MODULE_LICENSE("GPL");
linux-next