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ipvs: timeout tables do not need GFP_ATOMIC allocation
[linux/fpc-iii.git] / net / mac80211 / main.c
blobb70f7f09da6128c7594604bba4b9cc9c089119d5
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 || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
51 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
52 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53
54 if (local->fif_probe_req || local->probe_req_reg)
55 new_flags |= FIF_PROBE_REQ;
56
57 if (local->fif_fcsfail)
58 new_flags |= FIF_FCSFAIL;
59
60 if (local->fif_plcpfail)
61 new_flags |= FIF_PLCPFAIL;
62
63 if (local->fif_control)
64 new_flags |= FIF_CONTROL;
65
66 if (local->fif_other_bss)
67 new_flags |= FIF_OTHER_BSS;
68
69 if (local->fif_pspoll)
70 new_flags |= FIF_PSPOLL;
71
72 spin_lock_bh(&local->filter_lock);
73 changed_flags = local->filter_flags ^ new_flags;
74
75 mc = drv_prepare_multicast(local, &local->mc_list);
76 spin_unlock_bh(&local->filter_lock);
77
78 /* be a bit nasty */
79 new_flags |= (1<<31);
80
81 drv_configure_filter(local, changed_flags, &new_flags, mc);
82
83 WARN_ON(new_flags & (1<<31));
84
85 local->filter_flags = new_flags & ~(1<<31);
86 }
87
88 static void ieee80211_reconfig_filter(struct work_struct *work)
89 {
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
92
93 ieee80211_configure_filter(local);
94 }
95
96 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
97 {
98 struct ieee80211_channel *chan;
99 int ret = 0;
100 int power;
101 enum nl80211_channel_type channel_type;
102 u32 offchannel_flag;
103
104 might_sleep();
105
106 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
107 if (local->scan_channel) {
108 chan = local->scan_channel;
109 /* If scanning on oper channel, use whatever channel-type
110 * is currently in use.
111 */
112 if (chan == local->oper_channel)
113 channel_type = local->_oper_channel_type;
114 else
115 channel_type = NL80211_CHAN_NO_HT;
116 } else if (local->tmp_channel) {
117 chan = local->tmp_channel;
118 channel_type = local->tmp_channel_type;
119 } else {
120 chan = local->oper_channel;
121 channel_type = local->_oper_channel_type;
122 }
123
124 if (chan != local->oper_channel ||
125 channel_type != local->_oper_channel_type)
126 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
127 else
128 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
129
130 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
131
132 if (offchannel_flag || chan != local->hw.conf.channel ||
133 channel_type != local->hw.conf.channel_type) {
134 local->hw.conf.channel = chan;
135 local->hw.conf.channel_type = channel_type;
136 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
137 }
138
139 if (!conf_is_ht(&local->hw.conf)) {
140 /*
141 * mac80211.h documents that this is only valid
142 * when the channel is set to an HT type, and
143 * that otherwise STATIC is used.
144 */
145 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
146 } else if (local->hw.conf.smps_mode != local->smps_mode) {
147 local->hw.conf.smps_mode = local->smps_mode;
148 changed |= IEEE80211_CONF_CHANGE_SMPS;
149 }
150
151 if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
152 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
153 test_bit(SCAN_HW_SCANNING, &local->scanning))
154 power = chan->max_power;
155 else
156 power = local->power_constr_level ?
157 min(chan->max_power,
158 (chan->max_reg_power - local->power_constr_level)) :
159 chan->max_power;
160
161 if (local->user_power_level >= 0)
162 power = min(power, local->user_power_level);
163
164 if (local->hw.conf.power_level != power) {
165 changed |= IEEE80211_CONF_CHANGE_POWER;
166 local->hw.conf.power_level = power;
167 }
168
169 if (changed && local->open_count) {
170 ret = drv_config(local, changed);
171 /*
172 * Goal:
173 * HW reconfiguration should never fail, the driver has told
174 * us what it can support so it should live up to that promise.
175 *
176 * Current status:
177 * rfkill is not integrated with mac80211 and a
178 * configuration command can thus fail if hardware rfkill
179 * is enabled
180 *
181 * FIXME: integrate rfkill with mac80211 and then add this
182 * WARN_ON() back
183 *
184 */
185 /* WARN_ON(ret); */
186 }
187
188 return ret;
189 }
190
191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
192 u32 changed)
193 {
194 struct ieee80211_local *local = sdata->local;
195 static const u8 zero[ETH_ALEN] = { 0 };
196
197 if (!changed)
198 return;
199
200 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
201 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
202 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
203 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
204 else if (sdata->vif.type == NL80211_IFTYPE_AP)
205 sdata->vif.bss_conf.bssid = sdata->vif.addr;
206 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
207 sdata->vif.bss_conf.bssid = NULL;
208 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
209 sdata->vif.bss_conf.bssid = zero;
210 } else {
211 WARN_ON(1);
212 return;
213 }
214
215 switch (sdata->vif.type) {
216 case NL80211_IFTYPE_AP:
217 case NL80211_IFTYPE_ADHOC:
218 case NL80211_IFTYPE_WDS:
219 case NL80211_IFTYPE_MESH_POINT:
220 break;
221 default:
222 /* do not warn to simplify caller in scan.c */
223 changed &= ~BSS_CHANGED_BEACON_ENABLED;
224 if (WARN_ON(changed & BSS_CHANGED_BEACON))
225 return;
226 break;
227 }
228
229 if (changed & BSS_CHANGED_BEACON_ENABLED) {
230 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
231 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
232 sdata->vif.bss_conf.enable_beacon = false;
233 } else {
234 /*
235 * Beacon should be enabled, but AP mode must
236 * check whether there is a beacon configured.
237 */
238 switch (sdata->vif.type) {
239 case NL80211_IFTYPE_AP:
240 sdata->vif.bss_conf.enable_beacon =
241 !!sdata->u.ap.beacon;
242 break;
243 case NL80211_IFTYPE_ADHOC:
244 sdata->vif.bss_conf.enable_beacon =
245 !!sdata->u.ibss.presp;
246 break;
247 #ifdef CONFIG_MAC80211_MESH
248 case NL80211_IFTYPE_MESH_POINT:
249 sdata->vif.bss_conf.enable_beacon =
250 !!sdata->u.mesh.mesh_id_len;
251 break;
252 #endif
253 default:
254 /* not reached */
255 WARN_ON(1);
256 break;
257 }
258 }
259 }
260
261 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
262 }
263
264 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
265 {
266 sdata->vif.bss_conf.use_cts_prot = false;
267 sdata->vif.bss_conf.use_short_preamble = false;
268 sdata->vif.bss_conf.use_short_slot = false;
269 return BSS_CHANGED_ERP_CTS_PROT |
270 BSS_CHANGED_ERP_PREAMBLE |
271 BSS_CHANGED_ERP_SLOT;
272 }
273
274 static void ieee80211_tasklet_handler(unsigned long data)
275 {
276 struct ieee80211_local *local = (struct ieee80211_local *) data;
277 struct sta_info *sta, *tmp;
278 struct skb_eosp_msg_data *eosp_data;
279 struct sk_buff *skb;
280
281 while ((skb = skb_dequeue(&local->skb_queue)) ||
282 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
283 switch (skb->pkt_type) {
284 case IEEE80211_RX_MSG:
285 /* Clear skb->pkt_type in order to not confuse kernel
286 * netstack. */
287 skb->pkt_type = 0;
288 ieee80211_rx(&local->hw, skb);
289 break;
290 case IEEE80211_TX_STATUS_MSG:
291 skb->pkt_type = 0;
292 ieee80211_tx_status(&local->hw, skb);
293 break;
294 case IEEE80211_EOSP_MSG:
295 eosp_data = (void *)skb->cb;
296 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
297 /* skip wrong virtual interface */
298 if (memcmp(eosp_data->iface,
299 sta->sdata->vif.addr, ETH_ALEN))
300 continue;
301 clear_sta_flag(sta, WLAN_STA_SP);
302 break;
303 }
304 dev_kfree_skb(skb);
305 break;
306 default:
307 WARN(1, "mac80211: Packet is of unknown type %d\n",
308 skb->pkt_type);
309 dev_kfree_skb(skb);
310 break;
311 }
312 }
313 }
314
315 static void ieee80211_restart_work(struct work_struct *work)
316 {
317 struct ieee80211_local *local =
318 container_of(work, struct ieee80211_local, restart_work);
319
320 /* wait for scan work complete */
321 flush_workqueue(local->workqueue);
322
323 mutex_lock(&local->mtx);
324 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
325 local->sched_scanning,
326 "%s called with hardware scan in progress\n", __func__);
327 mutex_unlock(&local->mtx);
328
329 rtnl_lock();
330 ieee80211_scan_cancel(local);
331 ieee80211_reconfig(local);
332 rtnl_unlock();
333 }
334
335 void ieee80211_restart_hw(struct ieee80211_hw *hw)
336 {
337 struct ieee80211_local *local = hw_to_local(hw);
338
339 trace_api_restart_hw(local);
340
341 wiphy_info(hw->wiphy,
342 "Hardware restart was requested\n");
343
344 /* use this reason, ieee80211_reconfig will unblock it */
345 ieee80211_stop_queues_by_reason(hw,
346 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
347
348 schedule_work(&local->restart_work);
349 }
350 EXPORT_SYMBOL(ieee80211_restart_hw);
351
352 static void ieee80211_recalc_smps_work(struct work_struct *work)
353 {
354 struct ieee80211_local *local =
355 container_of(work, struct ieee80211_local, recalc_smps);
356
357 mutex_lock(&local->iflist_mtx);
358 ieee80211_recalc_smps(local);
359 mutex_unlock(&local->iflist_mtx);
360 }
361
362 #ifdef CONFIG_INET
363 static int ieee80211_ifa_changed(struct notifier_block *nb,
364 unsigned long data, void *arg)
365 {
366 struct in_ifaddr *ifa = arg;
367 struct ieee80211_local *local =
368 container_of(nb, struct ieee80211_local,
369 ifa_notifier);
370 struct net_device *ndev = ifa->ifa_dev->dev;
371 struct wireless_dev *wdev = ndev->ieee80211_ptr;
372 struct in_device *idev;
373 struct ieee80211_sub_if_data *sdata;
374 struct ieee80211_bss_conf *bss_conf;
375 struct ieee80211_if_managed *ifmgd;
376 int c = 0;
377
378 /* Make sure it's our interface that got changed */
379 if (!wdev)
380 return NOTIFY_DONE;
381
382 if (wdev->wiphy != local->hw.wiphy)
383 return NOTIFY_DONE;
384
385 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
386 bss_conf = &sdata->vif.bss_conf;
387
388 /* ARP filtering is only supported in managed mode */
389 if (sdata->vif.type != NL80211_IFTYPE_STATION)
390 return NOTIFY_DONE;
391
392 idev = __in_dev_get_rtnl(sdata->dev);
393 if (!idev)
394 return NOTIFY_DONE;
395
396 ifmgd = &sdata->u.mgd;
397 mutex_lock(&ifmgd->mtx);
398
399 /* Copy the addresses to the bss_conf list */
400 ifa = idev->ifa_list;
401 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
402 bss_conf->arp_addr_list[c] = ifa->ifa_address;
403 ifa = ifa->ifa_next;
404 c++;
405 }
406
407 /* If not all addresses fit the list, disable filtering */
408 if (ifa) {
409 sdata->arp_filter_state = false;
410 c = 0;
411 } else {
412 sdata->arp_filter_state = true;
413 }
414 bss_conf->arp_addr_cnt = c;
415
416 /* Configure driver only if associated (which also implies it is up) */
417 if (ifmgd->associated) {
418 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
419 ieee80211_bss_info_change_notify(sdata,
420 BSS_CHANGED_ARP_FILTER);
421 }
422
423 mutex_unlock(&ifmgd->mtx);
424
425 return NOTIFY_DONE;
426 }
427 #endif
428
429 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
430 {
431 struct ieee80211_local *local =
432 container_of(napi, struct ieee80211_local, napi);
433
434 return local->ops->napi_poll(&local->hw, budget);
435 }
436
437 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
438 {
439 struct ieee80211_local *local = hw_to_local(hw);
440
441 napi_schedule(&local->napi);
442 }
443 EXPORT_SYMBOL(ieee80211_napi_schedule);
444
445 void ieee80211_napi_complete(struct ieee80211_hw *hw)
446 {
447 struct ieee80211_local *local = hw_to_local(hw);
448
449 napi_complete(&local->napi);
450 }
451 EXPORT_SYMBOL(ieee80211_napi_complete);
452
453 /* There isn't a lot of sense in it, but you can transmit anything you like */
454 static const struct ieee80211_txrx_stypes
455 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
456 [NL80211_IFTYPE_ADHOC] = {
457 .tx = 0xffff,
458 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
459 },
460 [NL80211_IFTYPE_STATION] = {
461 .tx = 0xffff,
462 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
463 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
464 },
465 [NL80211_IFTYPE_AP] = {
466 .tx = 0xffff,
467 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
468 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
470 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
471 BIT(IEEE80211_STYPE_AUTH >> 4) |
472 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
473 BIT(IEEE80211_STYPE_ACTION >> 4),
474 },
475 [NL80211_IFTYPE_AP_VLAN] = {
476 /* copy AP */
477 .tx = 0xffff,
478 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
479 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
480 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
481 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
482 BIT(IEEE80211_STYPE_AUTH >> 4) |
483 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
484 BIT(IEEE80211_STYPE_ACTION >> 4),
485 },
486 [NL80211_IFTYPE_P2P_CLIENT] = {
487 .tx = 0xffff,
488 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
489 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
490 },
491 [NL80211_IFTYPE_P2P_GO] = {
492 .tx = 0xffff,
493 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
494 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
495 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
496 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
497 BIT(IEEE80211_STYPE_AUTH >> 4) |
498 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
499 BIT(IEEE80211_STYPE_ACTION >> 4),
500 },
501 [NL80211_IFTYPE_MESH_POINT] = {
502 .tx = 0xffff,
503 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
504 BIT(IEEE80211_STYPE_AUTH >> 4) |
505 BIT(IEEE80211_STYPE_DEAUTH >> 4),
506 },
507 };
508
509 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
510 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
511 IEEE80211_HT_AMPDU_PARM_DENSITY,
512
513 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
514 IEEE80211_HT_CAP_MAX_AMSDU |
515 IEEE80211_HT_CAP_SGI_40),
516 .mcs = {
517 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
518 0xff, 0xff, 0xff, 0xff, 0xff, },
519 },
520 };
521
522 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
523 const struct ieee80211_ops *ops)
524 {
525 struct ieee80211_local *local;
526 int priv_size, i;
527 struct wiphy *wiphy;
528
529 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
530 return NULL;
531
532 /* Ensure 32-byte alignment of our private data and hw private data.
533 * We use the wiphy priv data for both our ieee80211_local and for
534 * the driver's private data
535 *
536 * In memory it'll be like this:
537 *
538 * +-------------------------+
539 * | struct wiphy |
540 * +-------------------------+
541 * | struct ieee80211_local |
542 * +-------------------------+
543 * | driver's private data |
544 * +-------------------------+
545 *
546 */
547 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
548
549 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
550
551 if (!wiphy)
552 return NULL;
553
554 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
555
556 wiphy->privid = mac80211_wiphy_privid;
557
558 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
559 WIPHY_FLAG_4ADDR_AP |
560 WIPHY_FLAG_4ADDR_STATION |
561 WIPHY_FLAG_REPORTS_OBSS |
562 WIPHY_FLAG_OFFCHAN_TX;
563
564 if (ops->remain_on_channel)
565 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
566
567 wiphy->features = NL80211_FEATURE_SK_TX_STATUS |
568 NL80211_FEATURE_HT_IBSS;
569
570 if (!ops->set_key)
571 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
572
573 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
574
575 local = wiphy_priv(wiphy);
576
577 local->hw.wiphy = wiphy;
578
579 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
580
581 BUG_ON(!ops->tx && !ops->tx_frags);
582 BUG_ON(!ops->start);
583 BUG_ON(!ops->stop);
584 BUG_ON(!ops->config);
585 BUG_ON(!ops->add_interface);
586 BUG_ON(!ops->remove_interface);
587 BUG_ON(!ops->configure_filter);
588 local->ops = ops;
589
590 /* set up some defaults */
591 local->hw.queues = 1;
592 local->hw.max_rates = 1;
593 local->hw.max_report_rates = 0;
594 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
595 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
596 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
597 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
598 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
599 local->user_power_level = -1;
600 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
601
602 INIT_LIST_HEAD(&local->interfaces);
603
604 __hw_addr_init(&local->mc_list);
605
606 mutex_init(&local->iflist_mtx);
607 mutex_init(&local->mtx);
608
609 mutex_init(&local->key_mtx);
610 spin_lock_init(&local->filter_lock);
611 spin_lock_init(&local->queue_stop_reason_lock);
612
613 /*
614 * The rx_skb_queue is only accessed from tasklets,
615 * but other SKB queues are used from within IRQ
616 * context. Therefore, this one needs a different
617 * locking class so our direct, non-irq-safe use of
618 * the queue's lock doesn't throw lockdep warnings.
619 */
620 skb_queue_head_init_class(&local->rx_skb_queue,
621 &ieee80211_rx_skb_queue_class);
622
623 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
624
625 ieee80211_work_init(local);
626
627 INIT_WORK(&local->restart_work, ieee80211_restart_work);
628
629 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
630 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
631 local->smps_mode = IEEE80211_SMPS_OFF;
632
633 INIT_WORK(&local->dynamic_ps_enable_work,
634 ieee80211_dynamic_ps_enable_work);
635 INIT_WORK(&local->dynamic_ps_disable_work,
636 ieee80211_dynamic_ps_disable_work);
637 setup_timer(&local->dynamic_ps_timer,
638 ieee80211_dynamic_ps_timer, (unsigned long) local);
639
640 INIT_WORK(&local->sched_scan_stopped_work,
641 ieee80211_sched_scan_stopped_work);
642
643 spin_lock_init(&local->ack_status_lock);
644 idr_init(&local->ack_status_frames);
645 /* preallocate at least one entry */
646 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
647
648 sta_info_init(local);
649
650 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
651 skb_queue_head_init(&local->pending[i]);
652 atomic_set(&local->agg_queue_stop[i], 0);
653 }
654 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
655 (unsigned long)local);
656
657 tasklet_init(&local->tasklet,
658 ieee80211_tasklet_handler,
659 (unsigned long) local);
660
661 skb_queue_head_init(&local->skb_queue);
662 skb_queue_head_init(&local->skb_queue_unreliable);
663
664 /* init dummy netdev for use w/ NAPI */
665 init_dummy_netdev(&local->napi_dev);
666
667 ieee80211_led_names(local);
668
669 ieee80211_hw_roc_setup(local);
670
671 return &local->hw;
672 }
673 EXPORT_SYMBOL(ieee80211_alloc_hw);
674
675 int ieee80211_register_hw(struct ieee80211_hw *hw)
676 {
677 struct ieee80211_local *local = hw_to_local(hw);
678 int result, i;
679 enum ieee80211_band band;
680 int channels, max_bitrates;
681 bool supp_ht;
682 static const u32 cipher_suites[] = {
683 /* keep WEP first, it may be removed below */
684 WLAN_CIPHER_SUITE_WEP40,
685 WLAN_CIPHER_SUITE_WEP104,
686 WLAN_CIPHER_SUITE_TKIP,
687 WLAN_CIPHER_SUITE_CCMP,
688
689 /* keep last -- depends on hw flags! */
690 WLAN_CIPHER_SUITE_AES_CMAC
691 };
692
693 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
694 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
695 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
696 return -EINVAL;
697
698 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)
699 #ifdef CONFIG_PM
700 && (!local->ops->suspend || !local->ops->resume)
701 #endif
702 )
703 return -EINVAL;
704
705 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
706 return -EINVAL;
707
708 if (hw->max_report_rates == 0)
709 hw->max_report_rates = hw->max_rates;
710
711 /*
712 * generic code guarantees at least one band,
713 * set this very early because much code assumes
714 * that hw.conf.channel is assigned
715 */
716 channels = 0;
717 max_bitrates = 0;
718 supp_ht = false;
719 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
720 struct ieee80211_supported_band *sband;
721
722 sband = local->hw.wiphy->bands[band];
723 if (!sband)
724 continue;
725 if (!local->oper_channel) {
726 /* init channel we're on */
727 local->hw.conf.channel =
728 local->oper_channel = &sband->channels[0];
729 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
730 }
731 channels += sband->n_channels;
732
733 if (max_bitrates < sband->n_bitrates)
734 max_bitrates = sband->n_bitrates;
735 supp_ht = supp_ht || sband->ht_cap.ht_supported;
736 }
737
738 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
739 sizeof(void *) * channels, GFP_KERNEL);
740 if (!local->int_scan_req)
741 return -ENOMEM;
742
743 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
744 if (!local->hw.wiphy->bands[band])
745 continue;
746 local->int_scan_req->rates[band] = (u32) -1;
747 }
748
749 /* if low-level driver supports AP, we also support VLAN */
750 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
751 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
752 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
753 }
754
755 /* mac80211 always supports monitor */
756 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
757 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
758
759 /*
760 * mac80211 doesn't support more than 1 channel, and also not more
761 * than one IBSS interface
762 */
763 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
764 const struct ieee80211_iface_combination *c;
765 int j;
766
767 c = &hw->wiphy->iface_combinations[i];
768
769 if (c->num_different_channels > 1)
770 return -EINVAL;
771
772 for (j = 0; j < c->n_limits; j++)
773 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
774 c->limits[j].max > 1)
775 return -EINVAL;
776 }
777
778 #ifndef CONFIG_MAC80211_MESH
779 /* mesh depends on Kconfig, but drivers should set it if they want */
780 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
781 #endif
782
783 /* if the underlying driver supports mesh, mac80211 will (at least)
784 * provide routing of mesh authentication frames to userspace */
785 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
786 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
787
788 /* mac80211 supports control port protocol changing */
789 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
790
791 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
792 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
793 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
794 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
795
796 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
797 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
798 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
799
800 /*
801 * Calculate scan IE length -- we need this to alloc
802 * memory and to subtract from the driver limit. It
803 * includes the DS Params, (extended) supported rates, and HT
804 * information -- SSID is the driver's responsibility.
805 */
806 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
807 3 /* DS Params */;
808 if (supp_ht)
809 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
810
811 if (!local->ops->hw_scan) {
812 /* For hw_scan, driver needs to set these up. */
813 local->hw.wiphy->max_scan_ssids = 4;
814 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
815 }
816
817 /*
818 * If the driver supports any scan IEs, then assume the
819 * limit includes the IEs mac80211 will add, otherwise
820 * leave it at zero and let the driver sort it out; we
821 * still pass our IEs to the driver but userspace will
822 * not be allowed to in that case.
823 */
824 if (local->hw.wiphy->max_scan_ie_len)
825 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
826
827 /* Set up cipher suites unless driver already did */
828 if (!local->hw.wiphy->cipher_suites) {
829 local->hw.wiphy->cipher_suites = cipher_suites;
830 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
831 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
832 local->hw.wiphy->n_cipher_suites--;
833 }
834 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
835 if (local->hw.wiphy->cipher_suites == cipher_suites) {
836 local->hw.wiphy->cipher_suites += 2;
837 local->hw.wiphy->n_cipher_suites -= 2;
838 } else {
839 u32 *suites;
840 int r, w = 0;
841
842 /* Filter out WEP */
843
844 suites = kmemdup(
845 local->hw.wiphy->cipher_suites,
846 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
847 GFP_KERNEL);
848 if (!suites)
849 return -ENOMEM;
850 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
851 u32 suite = local->hw.wiphy->cipher_suites[r];
852 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
853 suite == WLAN_CIPHER_SUITE_WEP104)
854 continue;
855 suites[w++] = suite;
856 }
857 local->hw.wiphy->cipher_suites = suites;
858 local->hw.wiphy->n_cipher_suites = w;
859 local->wiphy_ciphers_allocated = true;
860 }
861 }
862
863 if (!local->ops->remain_on_channel)
864 local->hw.wiphy->max_remain_on_channel_duration = 5000;
865
866 if (local->ops->sched_scan_start)
867 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
868
869 /* mac80211 based drivers don't support internal TDLS setup */
870 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
871 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
872
873 result = wiphy_register(local->hw.wiphy);
874 if (result < 0)
875 goto fail_wiphy_register;
876
877 /*
878 * We use the number of queues for feature tests (QoS, HT) internally
879 * so restrict them appropriately.
880 */
881 if (hw->queues > IEEE80211_MAX_QUEUES)
882 hw->queues = IEEE80211_MAX_QUEUES;
883
884 local->workqueue =
885 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
886 if (!local->workqueue) {
887 result = -ENOMEM;
888 goto fail_workqueue;
889 }
890
891 /*
892 * The hardware needs headroom for sending the frame,
893 * and we need some headroom for passing the frame to monitor
894 * interfaces, but never both at the same time.
895 */
896 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
897 IEEE80211_TX_STATUS_HEADROOM);
898
899 debugfs_hw_add(local);
900
901 /*
902 * if the driver doesn't specify a max listen interval we
903 * use 5 which should be a safe default
904 */
905 if (local->hw.max_listen_interval == 0)
906 local->hw.max_listen_interval = 5;
907
908 local->hw.conf.listen_interval = local->hw.max_listen_interval;
909
910 local->dynamic_ps_forced_timeout = -1;
911
912 result = ieee80211_wep_init(local);
913 if (result < 0)
914 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
915 result);
916
917 ieee80211_led_init(local);
918
919 rtnl_lock();
920
921 result = ieee80211_init_rate_ctrl_alg(local,
922 hw->rate_control_algorithm);
923 if (result < 0) {
924 wiphy_debug(local->hw.wiphy,
925 "Failed to initialize rate control algorithm\n");
926 goto fail_rate;
927 }
928
929 /* add one default STA interface if supported */
930 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
931 result = ieee80211_if_add(local, "wlan%d", NULL,
932 NL80211_IFTYPE_STATION, NULL);
933 if (result)
934 wiphy_warn(local->hw.wiphy,
935 "Failed to add default virtual iface\n");
936 }
937
938 rtnl_unlock();
939
940 local->network_latency_notifier.notifier_call =
941 ieee80211_max_network_latency;
942 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
943 &local->network_latency_notifier);
944 if (result) {
945 rtnl_lock();
946 goto fail_pm_qos;
947 }
948
949 #ifdef CONFIG_INET
950 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
951 result = register_inetaddr_notifier(&local->ifa_notifier);
952 if (result)
953 goto fail_ifa;
954 #endif
955
956 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
957 local->hw.napi_weight);
958
959 return 0;
960
961 #ifdef CONFIG_INET
962 fail_ifa:
963 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
964 &local->network_latency_notifier);
965 rtnl_lock();
966 #endif
967 fail_pm_qos:
968 ieee80211_led_exit(local);
969 ieee80211_remove_interfaces(local);
970 fail_rate:
971 rtnl_unlock();
972 ieee80211_wep_free(local);
973 sta_info_stop(local);
974 destroy_workqueue(local->workqueue);
975 fail_workqueue:
976 wiphy_unregister(local->hw.wiphy);
977 fail_wiphy_register:
978 if (local->wiphy_ciphers_allocated)
979 kfree(local->hw.wiphy->cipher_suites);
980 kfree(local->int_scan_req);
981 return result;
982 }
983 EXPORT_SYMBOL(ieee80211_register_hw);
984
985 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
986 {
987 struct ieee80211_local *local = hw_to_local(hw);
988
989 tasklet_kill(&local->tx_pending_tasklet);
990 tasklet_kill(&local->tasklet);
991
992 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
993 &local->network_latency_notifier);
994 #ifdef CONFIG_INET
995 unregister_inetaddr_notifier(&local->ifa_notifier);
996 #endif
997
998 rtnl_lock();
999
1000 /*
1001 * At this point, interface list manipulations are fine
1002 * because the driver cannot be handing us frames any
1003 * more and the tasklet is killed.
1004 */
1005 ieee80211_remove_interfaces(local);
1006
1007 rtnl_unlock();
1008
1009 /*
1010 * Now all work items will be gone, but the
1011 * timer might still be armed, so delete it
1012 */
1013 del_timer_sync(&local->work_timer);
1014
1015 cancel_work_sync(&local->restart_work);
1016 cancel_work_sync(&local->reconfig_filter);
1017
1018 ieee80211_clear_tx_pending(local);
1019 rate_control_deinitialize(local);
1020
1021 if (skb_queue_len(&local->skb_queue) ||
1022 skb_queue_len(&local->skb_queue_unreliable))
1023 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1024 skb_queue_purge(&local->skb_queue);
1025 skb_queue_purge(&local->skb_queue_unreliable);
1026 skb_queue_purge(&local->rx_skb_queue);
1027
1028 destroy_workqueue(local->workqueue);
1029 wiphy_unregister(local->hw.wiphy);
1030 sta_info_stop(local);
1031 ieee80211_wep_free(local);
1032 ieee80211_led_exit(local);
1033 kfree(local->int_scan_req);
1034 }
1035 EXPORT_SYMBOL(ieee80211_unregister_hw);
1036
1037 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1038 {
1039 WARN_ONCE(1, "Have pending ack frames!\n");
1040 kfree_skb(p);
1041 return 0;
1042 }
1043
1044 void ieee80211_free_hw(struct ieee80211_hw *hw)
1045 {
1046 struct ieee80211_local *local = hw_to_local(hw);
1047
1048 mutex_destroy(&local->iflist_mtx);
1049 mutex_destroy(&local->mtx);
1050
1051 if (local->wiphy_ciphers_allocated)
1052 kfree(local->hw.wiphy->cipher_suites);
1053
1054 idr_for_each(&local->ack_status_frames,
1055 ieee80211_free_ack_frame, NULL);
1056 idr_destroy(&local->ack_status_frames);
1057
1058 wiphy_free(local->hw.wiphy);
1059 }
1060 EXPORT_SYMBOL(ieee80211_free_hw);
1061
1062 static int __init ieee80211_init(void)
1063 {
1064 struct sk_buff *skb;
1065 int ret;
1066
1067 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1068 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1069 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1070
1071 ret = rc80211_minstrel_init();
1072 if (ret)
1073 return ret;
1074
1075 ret = rc80211_minstrel_ht_init();
1076 if (ret)
1077 goto err_minstrel;
1078
1079 ret = rc80211_pid_init();
1080 if (ret)
1081 goto err_pid;
1082
1083 ret = ieee80211_iface_init();
1084 if (ret)
1085 goto err_netdev;
1086
1087 return 0;
1088 err_netdev:
1089 rc80211_pid_exit();
1090 err_pid:
1091 rc80211_minstrel_ht_exit();
1092 err_minstrel:
1093 rc80211_minstrel_exit();
1094
1095 return ret;
1096 }
1097
1098 static void __exit ieee80211_exit(void)
1099 {
1100 rc80211_pid_exit();
1101 rc80211_minstrel_ht_exit();
1102 rc80211_minstrel_exit();
1103
1104 if (mesh_allocated)
1105 ieee80211s_stop();
1106
1107 ieee80211_iface_exit();
1108
1109 rcu_barrier();
1110 }
1111
1112
1113 subsys_initcall(ieee80211_init);
1114 module_exit(ieee80211_exit);
1115
1116 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1117 MODULE_LICENSE("GPL");
Linux with added FPC-III support