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[mirror_ubuntu-artful-kernel.git] / net / mac80211 / main.c
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 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/pm_qos.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "cfg.h"
36 #include "debugfs.h"
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 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 {
98 struct ieee80211_sub_if_data *sdata;
99 struct cfg80211_chan_def chandef = {};
100 u32 changed = 0;
101 int power;
102 u32 offchannel_flag;
103
104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105
106 if (local->scan_chandef.chan) {
107 chandef = local->scan_chandef;
108 } else if (local->tmp_channel) {
109 chandef.chan = local->tmp_channel;
110 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
111 chandef.center_freq1 = chandef.chan->center_freq;
112 } else
113 chandef = local->_oper_chandef;
114
115 WARN(!cfg80211_chandef_valid(&chandef),
116 "control:%d MHz width:%d center: %d/%d MHz",
117 chandef.chan->center_freq, chandef.width,
118 chandef.center_freq1, chandef.center_freq2);
119
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 else
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 }
133
134 if (!conf_is_ht(&local->hw.conf)) {
135 /*
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
139 */
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
144 }
145
146 power = ieee80211_chandef_max_power(&chandef);
147
148 rcu_read_lock();
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151 continue;
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 continue;
154 power = min(power, sdata->vif.bss_conf.txpower);
155 }
156 rcu_read_unlock();
157
158 if (local->hw.conf.power_level != power) {
159 changed |= IEEE80211_CONF_CHANGE_POWER;
160 local->hw.conf.power_level = power;
161 }
162
163 return changed;
164 }
165
166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 {
168 int ret = 0;
169
170 might_sleep();
171
172 if (!local->use_chanctx)
173 changed |= ieee80211_hw_conf_chan(local);
174 else
175 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
176 IEEE80211_CONF_CHANGE_POWER);
177
178 if (changed && local->open_count) {
179 ret = drv_config(local, changed);
180 /*
181 * Goal:
182 * HW reconfiguration should never fail, the driver has told
183 * us what it can support so it should live up to that promise.
184 *
185 * Current status:
186 * rfkill is not integrated with mac80211 and a
187 * configuration command can thus fail if hardware rfkill
188 * is enabled
189 *
190 * FIXME: integrate rfkill with mac80211 and then add this
191 * WARN_ON() back
192 *
193 */
194 /* WARN_ON(ret); */
195 }
196
197 return ret;
198 }
199
200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
201 u32 changed)
202 {
203 struct ieee80211_local *local = sdata->local;
204
205 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
206 return;
207
208 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
209 }
210
211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212 {
213 sdata->vif.bss_conf.use_cts_prot = false;
214 sdata->vif.bss_conf.use_short_preamble = false;
215 sdata->vif.bss_conf.use_short_slot = false;
216 return BSS_CHANGED_ERP_CTS_PROT |
217 BSS_CHANGED_ERP_PREAMBLE |
218 BSS_CHANGED_ERP_SLOT;
219 }
220
221 static void ieee80211_tasklet_handler(unsigned long data)
222 {
223 struct ieee80211_local *local = (struct ieee80211_local *) data;
224 struct sk_buff *skb;
225
226 while ((skb = skb_dequeue(&local->skb_queue)) ||
227 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
228 switch (skb->pkt_type) {
229 case IEEE80211_RX_MSG:
230 /* Clear skb->pkt_type in order to not confuse kernel
231 * netstack. */
232 skb->pkt_type = 0;
233 ieee80211_rx(&local->hw, skb);
234 break;
235 case IEEE80211_TX_STATUS_MSG:
236 skb->pkt_type = 0;
237 ieee80211_tx_status(&local->hw, skb);
238 break;
239 default:
240 WARN(1, "mac80211: Packet is of unknown type %d\n",
241 skb->pkt_type);
242 dev_kfree_skb(skb);
243 break;
244 }
245 }
246 }
247
248 static void ieee80211_restart_work(struct work_struct *work)
249 {
250 struct ieee80211_local *local =
251 container_of(work, struct ieee80211_local, restart_work);
252
253 /* wait for scan work complete */
254 flush_workqueue(local->workqueue);
255
256 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
257 "%s called with hardware scan in progress\n", __func__);
258
259 rtnl_lock();
260 ieee80211_scan_cancel(local);
261 ieee80211_reconfig(local);
262 rtnl_unlock();
263 }
264
265 void ieee80211_restart_hw(struct ieee80211_hw *hw)
266 {
267 struct ieee80211_local *local = hw_to_local(hw);
268
269 trace_api_restart_hw(local);
270
271 wiphy_info(hw->wiphy,
272 "Hardware restart was requested\n");
273
274 /* use this reason, ieee80211_reconfig will unblock it */
275 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
276 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
277 false);
278
279 /*
280 * Stop all Rx during the reconfig. We don't want state changes
281 * or driver callbacks while this is in progress.
282 */
283 local->in_reconfig = true;
284 barrier();
285
286 schedule_work(&local->restart_work);
287 }
288 EXPORT_SYMBOL(ieee80211_restart_hw);
289
290 #ifdef CONFIG_INET
291 static int ieee80211_ifa_changed(struct notifier_block *nb,
292 unsigned long data, void *arg)
293 {
294 struct in_ifaddr *ifa = arg;
295 struct ieee80211_local *local =
296 container_of(nb, struct ieee80211_local,
297 ifa_notifier);
298 struct net_device *ndev = ifa->ifa_dev->dev;
299 struct wireless_dev *wdev = ndev->ieee80211_ptr;
300 struct in_device *idev;
301 struct ieee80211_sub_if_data *sdata;
302 struct ieee80211_bss_conf *bss_conf;
303 struct ieee80211_if_managed *ifmgd;
304 int c = 0;
305
306 /* Make sure it's our interface that got changed */
307 if (!wdev)
308 return NOTIFY_DONE;
309
310 if (wdev->wiphy != local->hw.wiphy)
311 return NOTIFY_DONE;
312
313 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
314 bss_conf = &sdata->vif.bss_conf;
315
316 /* ARP filtering is only supported in managed mode */
317 if (sdata->vif.type != NL80211_IFTYPE_STATION)
318 return NOTIFY_DONE;
319
320 idev = __in_dev_get_rtnl(sdata->dev);
321 if (!idev)
322 return NOTIFY_DONE;
323
324 ifmgd = &sdata->u.mgd;
325 sdata_lock(sdata);
326
327 /* Copy the addresses to the bss_conf list */
328 ifa = idev->ifa_list;
329 while (ifa) {
330 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
331 bss_conf->arp_addr_list[c] = ifa->ifa_address;
332 ifa = ifa->ifa_next;
333 c++;
334 }
335
336 bss_conf->arp_addr_cnt = c;
337
338 /* Configure driver only if associated (which also implies it is up) */
339 if (ifmgd->associated)
340 ieee80211_bss_info_change_notify(sdata,
341 BSS_CHANGED_ARP_FILTER);
342
343 sdata_unlock(sdata);
344
345 return NOTIFY_OK;
346 }
347 #endif
348
349 #if IS_ENABLED(CONFIG_IPV6)
350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
351 unsigned long data, void *arg)
352 {
353 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
354 struct inet6_dev *idev = ifa->idev;
355 struct net_device *ndev = ifa->idev->dev;
356 struct ieee80211_local *local =
357 container_of(nb, struct ieee80211_local, ifa6_notifier);
358 struct wireless_dev *wdev = ndev->ieee80211_ptr;
359 struct ieee80211_sub_if_data *sdata;
360
361 /* Make sure it's our interface that got changed */
362 if (!wdev || wdev->wiphy != local->hw.wiphy)
363 return NOTIFY_DONE;
364
365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366
367 /*
368 * For now only support station mode. This is mostly because
369 * doing AP would have to handle AP_VLAN in some way ...
370 */
371 if (sdata->vif.type != NL80211_IFTYPE_STATION)
372 return NOTIFY_DONE;
373
374 drv_ipv6_addr_change(local, sdata, idev);
375
376 return NOTIFY_OK;
377 }
378 #endif
379
380 /* There isn't a lot of sense in it, but you can transmit anything you like */
381 static const struct ieee80211_txrx_stypes
382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
383 [NL80211_IFTYPE_ADHOC] = {
384 .tx = 0xffff,
385 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
386 BIT(IEEE80211_STYPE_AUTH >> 4) |
387 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
388 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
389 },
390 [NL80211_IFTYPE_STATION] = {
391 .tx = 0xffff,
392 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394 },
395 [NL80211_IFTYPE_AP] = {
396 .tx = 0xffff,
397 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
398 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
399 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
400 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
401 BIT(IEEE80211_STYPE_AUTH >> 4) |
402 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
403 BIT(IEEE80211_STYPE_ACTION >> 4),
404 },
405 [NL80211_IFTYPE_AP_VLAN] = {
406 /* copy AP */
407 .tx = 0xffff,
408 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
409 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
411 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
412 BIT(IEEE80211_STYPE_AUTH >> 4) |
413 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414 BIT(IEEE80211_STYPE_ACTION >> 4),
415 },
416 [NL80211_IFTYPE_P2P_CLIENT] = {
417 .tx = 0xffff,
418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
420 },
421 [NL80211_IFTYPE_P2P_GO] = {
422 .tx = 0xffff,
423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
427 BIT(IEEE80211_STYPE_AUTH >> 4) |
428 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
429 BIT(IEEE80211_STYPE_ACTION >> 4),
430 },
431 [NL80211_IFTYPE_MESH_POINT] = {
432 .tx = 0xffff,
433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH >> 4),
436 },
437 [NL80211_IFTYPE_P2P_DEVICE] = {
438 .tx = 0xffff,
439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
441 },
442 };
443
444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
445 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
446 IEEE80211_HT_AMPDU_PARM_DENSITY,
447
448 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
449 IEEE80211_HT_CAP_MAX_AMSDU |
450 IEEE80211_HT_CAP_SGI_20 |
451 IEEE80211_HT_CAP_SGI_40 |
452 IEEE80211_HT_CAP_LDPC_CODING |
453 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
454 .mcs = {
455 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
456 0xff, 0xff, 0xff, 0xff, 0xff, },
457 },
458 };
459
460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
461 .vht_cap_info =
462 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
463 IEEE80211_VHT_CAP_SHORT_GI_80 |
464 IEEE80211_VHT_CAP_SHORT_GI_160 |
465 IEEE80211_VHT_CAP_RXSTBC_1 |
466 IEEE80211_VHT_CAP_RXSTBC_2 |
467 IEEE80211_VHT_CAP_RXSTBC_3 |
468 IEEE80211_VHT_CAP_RXSTBC_4 |
469 IEEE80211_VHT_CAP_TXSTBC |
470 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
471 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
472 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
473 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
474 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
475 .supp_mcs = {
476 .rx_mcs_map = cpu_to_le16(~0),
477 .tx_mcs_map = cpu_to_le16(~0),
478 },
479 };
480
481 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
482 const struct ieee80211_ops *ops,
483 const char *requested_name)
484 {
485 struct ieee80211_local *local;
486 int priv_size, i;
487 struct wiphy *wiphy;
488 bool use_chanctx;
489
490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
491 !ops->add_interface || !ops->remove_interface ||
492 !ops->configure_filter))
493 return NULL;
494
495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
496 return NULL;
497
498 /* check all or no channel context operations exist */
499 i = !!ops->add_chanctx + !!ops->remove_chanctx +
500 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
501 !!ops->unassign_vif_chanctx;
502 if (WARN_ON(i != 0 && i != 5))
503 return NULL;
504 use_chanctx = i == 5;
505
506 /* Ensure 32-byte alignment of our private data and hw private data.
507 * We use the wiphy priv data for both our ieee80211_local and for
508 * the driver's private data
509 *
510 * In memory it'll be like this:
511 *
512 * +-------------------------+
513 * | struct wiphy |
514 * +-------------------------+
515 * | struct ieee80211_local |
516 * +-------------------------+
517 * | driver's private data |
518 * +-------------------------+
519 *
520 */
521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
522
523 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
524
525 if (!wiphy)
526 return NULL;
527
528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
529
530 wiphy->privid = mac80211_wiphy_privid;
531
532 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
533 WIPHY_FLAG_4ADDR_AP |
534 WIPHY_FLAG_4ADDR_STATION |
535 WIPHY_FLAG_REPORTS_OBSS |
536 WIPHY_FLAG_OFFCHAN_TX;
537
538 if (ops->remain_on_channel)
539 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
540
541 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
542 NL80211_FEATURE_SAE |
543 NL80211_FEATURE_HT_IBSS |
544 NL80211_FEATURE_VIF_TXPOWER |
545 NL80211_FEATURE_MAC_ON_CREATE |
546 NL80211_FEATURE_USERSPACE_MPM;
547
548 if (!ops->hw_scan)
549 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
550 NL80211_FEATURE_AP_SCAN;
551
552
553 if (!ops->set_key)
554 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
555
556 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
557
558 local = wiphy_priv(wiphy);
559
560 local->hw.wiphy = wiphy;
561
562 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
563
564 local->ops = ops;
565 local->use_chanctx = use_chanctx;
566
567 /* set up some defaults */
568 local->hw.queues = 1;
569 local->hw.max_rates = 1;
570 local->hw.max_report_rates = 0;
571 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
572 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
573 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
574 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
575 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
576 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
577 IEEE80211_RADIOTAP_MCS_HAVE_GI |
578 IEEE80211_RADIOTAP_MCS_HAVE_BW;
579 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
580 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
581 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
582 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
583 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
584 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
585 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
586
587 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
588
589 wiphy->extended_capabilities = local->ext_capa;
590 wiphy->extended_capabilities_mask = local->ext_capa;
591 wiphy->extended_capabilities_len =
592 ARRAY_SIZE(local->ext_capa);
593
594 INIT_LIST_HEAD(&local->interfaces);
595
596 __hw_addr_init(&local->mc_list);
597
598 mutex_init(&local->iflist_mtx);
599 mutex_init(&local->mtx);
600
601 mutex_init(&local->key_mtx);
602 spin_lock_init(&local->filter_lock);
603 spin_lock_init(&local->rx_path_lock);
604 spin_lock_init(&local->queue_stop_reason_lock);
605
606 INIT_LIST_HEAD(&local->chanctx_list);
607 mutex_init(&local->chanctx_mtx);
608
609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
610
611 INIT_WORK(&local->restart_work, ieee80211_restart_work);
612
613 INIT_WORK(&local->radar_detected_work,
614 ieee80211_dfs_radar_detected_work);
615
616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617 local->smps_mode = IEEE80211_SMPS_OFF;
618
619 INIT_WORK(&local->dynamic_ps_enable_work,
620 ieee80211_dynamic_ps_enable_work);
621 INIT_WORK(&local->dynamic_ps_disable_work,
622 ieee80211_dynamic_ps_disable_work);
623 setup_timer(&local->dynamic_ps_timer,
624 ieee80211_dynamic_ps_timer, (unsigned long) local);
625
626 INIT_WORK(&local->sched_scan_stopped_work,
627 ieee80211_sched_scan_stopped_work);
628
629 spin_lock_init(&local->ack_status_lock);
630 idr_init(&local->ack_status_frames);
631
632 sta_info_init(local);
633
634 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
635 skb_queue_head_init(&local->pending[i]);
636 atomic_set(&local->agg_queue_stop[i], 0);
637 }
638 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
639 (unsigned long)local);
640
641 tasklet_init(&local->tasklet,
642 ieee80211_tasklet_handler,
643 (unsigned long) local);
644
645 skb_queue_head_init(&local->skb_queue);
646 skb_queue_head_init(&local->skb_queue_unreliable);
647
648 ieee80211_led_names(local);
649
650 ieee80211_roc_setup(local);
651
652 return &local->hw;
653 }
654 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
655
656 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
657 {
658 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
659 IS_ERR(local->wep_rx_tfm));
660 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
661 int n_suites = 0, r = 0, w = 0;
662 u32 *suites;
663 static const u32 cipher_suites[] = {
664 /* keep WEP first, it may be removed below */
665 WLAN_CIPHER_SUITE_WEP40,
666 WLAN_CIPHER_SUITE_WEP104,
667 WLAN_CIPHER_SUITE_TKIP,
668 WLAN_CIPHER_SUITE_CCMP,
669 WLAN_CIPHER_SUITE_CCMP_256,
670 WLAN_CIPHER_SUITE_GCMP,
671 WLAN_CIPHER_SUITE_GCMP_256,
672
673 /* keep last -- depends on hw flags! */
674 WLAN_CIPHER_SUITE_AES_CMAC,
675 WLAN_CIPHER_SUITE_BIP_CMAC_256,
676 WLAN_CIPHER_SUITE_BIP_GMAC_128,
677 WLAN_CIPHER_SUITE_BIP_GMAC_256,
678 };
679
680 if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
681 local->hw.wiphy->cipher_suites) {
682 /* If the driver advertises, or doesn't support SW crypto,
683 * we only need to remove WEP if necessary.
684 */
685 if (have_wep)
686 return 0;
687
688 /* well if it has _no_ ciphers ... fine */
689 if (!local->hw.wiphy->n_cipher_suites)
690 return 0;
691
692 /* Driver provides cipher suites, but we need to exclude WEP */
693 suites = kmemdup(local->hw.wiphy->cipher_suites,
694 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
695 GFP_KERNEL);
696 if (!suites)
697 return -ENOMEM;
698
699 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
700 u32 suite = local->hw.wiphy->cipher_suites[r];
701
702 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
703 suite == WLAN_CIPHER_SUITE_WEP104)
704 continue;
705 suites[w++] = suite;
706 }
707 } else if (!local->hw.cipher_schemes) {
708 /* If the driver doesn't have cipher schemes, there's nothing
709 * else to do other than assign the (software supported and
710 * perhaps offloaded) cipher suites.
711 */
712 local->hw.wiphy->cipher_suites = cipher_suites;
713 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
714
715 if (!have_mfp)
716 local->hw.wiphy->n_cipher_suites -= 4;
717
718 if (!have_wep) {
719 local->hw.wiphy->cipher_suites += 2;
720 local->hw.wiphy->n_cipher_suites -= 2;
721 }
722
723 /* not dynamically allocated, so just return */
724 return 0;
725 } else {
726 const struct ieee80211_cipher_scheme *cs;
727
728 cs = local->hw.cipher_schemes;
729
730 /* Driver specifies cipher schemes only (but not cipher suites
731 * including the schemes)
732 *
733 * We start counting ciphers defined by schemes, TKIP, CCMP,
734 * CCMP-256, GCMP, and GCMP-256
735 */
736 n_suites = local->hw.n_cipher_schemes + 5;
737
738 /* check if we have WEP40 and WEP104 */
739 if (have_wep)
740 n_suites += 2;
741
742 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
743 * BIP-GMAC-256
744 */
745 if (have_mfp)
746 n_suites += 4;
747
748 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
749 if (!suites)
750 return -ENOMEM;
751
752 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
753 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
754 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
755 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
756 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
757
758 if (have_wep) {
759 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
760 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
761 }
762
763 if (have_mfp) {
764 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
765 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
766 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
767 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
768 }
769
770 for (r = 0; r < local->hw.n_cipher_schemes; r++)
771 suites[w++] = cs[r].cipher;
772 }
773
774 local->hw.wiphy->cipher_suites = suites;
775 local->hw.wiphy->n_cipher_suites = w;
776 local->wiphy_ciphers_allocated = true;
777
778 return 0;
779 }
780
781 int ieee80211_register_hw(struct ieee80211_hw *hw)
782 {
783 struct ieee80211_local *local = hw_to_local(hw);
784 int result, i;
785 enum ieee80211_band band;
786 int channels, max_bitrates;
787 bool supp_ht, supp_vht;
788 netdev_features_t feature_whitelist;
789 struct cfg80211_chan_def dflt_chandef = {};
790
791 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
792 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
793 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
794 return -EINVAL;
795
796 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
797 (!local->ops->tdls_channel_switch ||
798 !local->ops->tdls_cancel_channel_switch ||
799 !local->ops->tdls_recv_channel_switch))
800 return -EOPNOTSUPP;
801
802 #ifdef CONFIG_PM
803 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
804 return -EINVAL;
805 #endif
806
807 if (!local->use_chanctx) {
808 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
809 const struct ieee80211_iface_combination *comb;
810
811 comb = &local->hw.wiphy->iface_combinations[i];
812
813 if (comb->num_different_channels > 1)
814 return -EINVAL;
815 }
816 } else {
817 /*
818 * WDS is currently prohibited when channel contexts are used
819 * because there's no clear definition of which channel WDS
820 * type interfaces use
821 */
822 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
823 return -EINVAL;
824
825 /* DFS is not supported with multi-channel combinations yet */
826 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
827 const struct ieee80211_iface_combination *comb;
828
829 comb = &local->hw.wiphy->iface_combinations[i];
830
831 if (comb->radar_detect_widths &&
832 comb->num_different_channels > 1)
833 return -EINVAL;
834 }
835 }
836
837 /* Only HW csum features are currently compatible with mac80211 */
838 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
839 NETIF_F_HW_CSUM;
840 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
841 return -EINVAL;
842
843 if (hw->max_report_rates == 0)
844 hw->max_report_rates = hw->max_rates;
845
846 local->rx_chains = 1;
847
848 /*
849 * generic code guarantees at least one band,
850 * set this very early because much code assumes
851 * that hw.conf.channel is assigned
852 */
853 channels = 0;
854 max_bitrates = 0;
855 supp_ht = false;
856 supp_vht = false;
857 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
858 struct ieee80211_supported_band *sband;
859
860 sband = local->hw.wiphy->bands[band];
861 if (!sband)
862 continue;
863
864 if (!dflt_chandef.chan) {
865 cfg80211_chandef_create(&dflt_chandef,
866 &sband->channels[0],
867 NL80211_CHAN_NO_HT);
868 /* init channel we're on */
869 if (!local->use_chanctx && !local->_oper_chandef.chan) {
870 local->hw.conf.chandef = dflt_chandef;
871 local->_oper_chandef = dflt_chandef;
872 }
873 local->monitor_chandef = dflt_chandef;
874 }
875
876 channels += sband->n_channels;
877
878 if (max_bitrates < sband->n_bitrates)
879 max_bitrates = sband->n_bitrates;
880 supp_ht = supp_ht || sband->ht_cap.ht_supported;
881 supp_vht = supp_vht || sband->vht_cap.vht_supported;
882
883 if (sband->ht_cap.ht_supported)
884 local->rx_chains =
885 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
886 local->rx_chains);
887
888 /* TODO: consider VHT for RX chains, hopefully it's the same */
889 }
890
891 /* if low-level driver supports AP, we also support VLAN */
892 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
893 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
894 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
895 }
896
897 /* mac80211 always supports monitor */
898 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
899 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
900
901 /* mac80211 doesn't support more than one IBSS interface right now */
902 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
903 const struct ieee80211_iface_combination *c;
904 int j;
905
906 c = &hw->wiphy->iface_combinations[i];
907
908 for (j = 0; j < c->n_limits; j++)
909 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
910 c->limits[j].max > 1)
911 return -EINVAL;
912 }
913
914 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
915 sizeof(void *) * channels, GFP_KERNEL);
916 if (!local->int_scan_req)
917 return -ENOMEM;
918
919 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
920 if (!local->hw.wiphy->bands[band])
921 continue;
922 local->int_scan_req->rates[band] = (u32) -1;
923 }
924
925 #ifndef CONFIG_MAC80211_MESH
926 /* mesh depends on Kconfig, but drivers should set it if they want */
927 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
928 #endif
929
930 /* if the underlying driver supports mesh, mac80211 will (at least)
931 * provide routing of mesh authentication frames to userspace */
932 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
933 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
934
935 /* mac80211 supports control port protocol changing */
936 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
937
938 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
939 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
940 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
941 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
942 if (hw->max_signal <= 0) {
943 result = -EINVAL;
944 goto fail_wiphy_register;
945 }
946 }
947
948 /*
949 * Calculate scan IE length -- we need this to alloc
950 * memory and to subtract from the driver limit. It
951 * includes the DS Params, (extended) supported rates, and HT
952 * information -- SSID is the driver's responsibility.
953 */
954 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
955 3 /* DS Params */;
956 if (supp_ht)
957 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
958
959 if (supp_vht)
960 local->scan_ies_len +=
961 2 + sizeof(struct ieee80211_vht_cap);
962
963 if (!local->ops->hw_scan) {
964 /* For hw_scan, driver needs to set these up. */
965 local->hw.wiphy->max_scan_ssids = 4;
966 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
967 }
968
969 /*
970 * If the driver supports any scan IEs, then assume the
971 * limit includes the IEs mac80211 will add, otherwise
972 * leave it at zero and let the driver sort it out; we
973 * still pass our IEs to the driver but userspace will
974 * not be allowed to in that case.
975 */
976 if (local->hw.wiphy->max_scan_ie_len)
977 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
978
979 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
980 local->hw.n_cipher_schemes));
981
982 result = ieee80211_init_cipher_suites(local);
983 if (result < 0)
984 goto fail_wiphy_register;
985
986 if (!local->ops->remain_on_channel)
987 local->hw.wiphy->max_remain_on_channel_duration = 5000;
988
989 /* mac80211 based drivers don't support internal TDLS setup */
990 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
991 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
992
993 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
994 if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
995 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
996
997 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
998
999 result = wiphy_register(local->hw.wiphy);
1000 if (result < 0)
1001 goto fail_wiphy_register;
1002
1003 /*
1004 * We use the number of queues for feature tests (QoS, HT) internally
1005 * so restrict them appropriately.
1006 */
1007 if (hw->queues > IEEE80211_MAX_QUEUES)
1008 hw->queues = IEEE80211_MAX_QUEUES;
1009
1010 local->workqueue =
1011 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1012 if (!local->workqueue) {
1013 result = -ENOMEM;
1014 goto fail_workqueue;
1015 }
1016
1017 /*
1018 * The hardware needs headroom for sending the frame,
1019 * and we need some headroom for passing the frame to monitor
1020 * interfaces, but never both at the same time.
1021 */
1022 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1023 IEEE80211_TX_STATUS_HEADROOM);
1024
1025 debugfs_hw_add(local);
1026
1027 /*
1028 * if the driver doesn't specify a max listen interval we
1029 * use 5 which should be a safe default
1030 */
1031 if (local->hw.max_listen_interval == 0)
1032 local->hw.max_listen_interval = 5;
1033
1034 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1035
1036 local->dynamic_ps_forced_timeout = -1;
1037
1038 result = ieee80211_wep_init(local);
1039 if (result < 0)
1040 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1041 result);
1042
1043 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1044
1045 ieee80211_led_init(local);
1046
1047 rtnl_lock();
1048
1049 result = ieee80211_init_rate_ctrl_alg(local,
1050 hw->rate_control_algorithm);
1051 if (result < 0) {
1052 wiphy_debug(local->hw.wiphy,
1053 "Failed to initialize rate control algorithm\n");
1054 goto fail_rate;
1055 }
1056
1057 /* add one default STA interface if supported */
1058 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1059 !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1060 result = ieee80211_if_add(local, "wlan%d", NULL,
1061 NL80211_IFTYPE_STATION, NULL);
1062 if (result)
1063 wiphy_warn(local->hw.wiphy,
1064 "Failed to add default virtual iface\n");
1065 }
1066
1067 rtnl_unlock();
1068
1069 local->network_latency_notifier.notifier_call =
1070 ieee80211_max_network_latency;
1071 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1072 &local->network_latency_notifier);
1073 if (result)
1074 goto fail_pm_qos;
1075
1076 #ifdef CONFIG_INET
1077 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1078 result = register_inetaddr_notifier(&local->ifa_notifier);
1079 if (result)
1080 goto fail_ifa;
1081 #endif
1082
1083 #if IS_ENABLED(CONFIG_IPV6)
1084 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1085 result = register_inet6addr_notifier(&local->ifa6_notifier);
1086 if (result)
1087 goto fail_ifa6;
1088 #endif
1089
1090 return 0;
1091
1092 #if IS_ENABLED(CONFIG_IPV6)
1093 fail_ifa6:
1094 #ifdef CONFIG_INET
1095 unregister_inetaddr_notifier(&local->ifa_notifier);
1096 #endif
1097 #endif
1098 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1099 fail_ifa:
1100 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1101 &local->network_latency_notifier);
1102 #endif
1103 fail_pm_qos:
1104 rtnl_lock();
1105 rate_control_deinitialize(local);
1106 ieee80211_remove_interfaces(local);
1107 fail_rate:
1108 rtnl_unlock();
1109 ieee80211_led_exit(local);
1110 ieee80211_wep_free(local);
1111 destroy_workqueue(local->workqueue);
1112 fail_workqueue:
1113 wiphy_unregister(local->hw.wiphy);
1114 fail_wiphy_register:
1115 if (local->wiphy_ciphers_allocated)
1116 kfree(local->hw.wiphy->cipher_suites);
1117 kfree(local->int_scan_req);
1118 return result;
1119 }
1120 EXPORT_SYMBOL(ieee80211_register_hw);
1121
1122 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1123 struct net_device *napi_dev,
1124 int (*poll)(struct napi_struct *, int),
1125 int weight)
1126 {
1127 struct ieee80211_local *local = hw_to_local(hw);
1128
1129 netif_napi_add(napi_dev, napi, poll, weight);
1130 local->napi = napi;
1131 }
1132 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1133
1134 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1135 {
1136 struct ieee80211_local *local = hw_to_local(hw);
1137
1138 tasklet_kill(&local->tx_pending_tasklet);
1139 tasklet_kill(&local->tasklet);
1140
1141 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1142 &local->network_latency_notifier);
1143 #ifdef CONFIG_INET
1144 unregister_inetaddr_notifier(&local->ifa_notifier);
1145 #endif
1146 #if IS_ENABLED(CONFIG_IPV6)
1147 unregister_inet6addr_notifier(&local->ifa6_notifier);
1148 #endif
1149
1150 rtnl_lock();
1151
1152 /*
1153 * At this point, interface list manipulations are fine
1154 * because the driver cannot be handing us frames any
1155 * more and the tasklet is killed.
1156 */
1157 ieee80211_remove_interfaces(local);
1158
1159 rtnl_unlock();
1160
1161 cancel_work_sync(&local->restart_work);
1162 cancel_work_sync(&local->reconfig_filter);
1163 flush_work(&local->sched_scan_stopped_work);
1164
1165 ieee80211_clear_tx_pending(local);
1166 rate_control_deinitialize(local);
1167
1168 if (skb_queue_len(&local->skb_queue) ||
1169 skb_queue_len(&local->skb_queue_unreliable))
1170 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1171 skb_queue_purge(&local->skb_queue);
1172 skb_queue_purge(&local->skb_queue_unreliable);
1173
1174 destroy_workqueue(local->workqueue);
1175 wiphy_unregister(local->hw.wiphy);
1176 sta_info_stop(local);
1177 ieee80211_wep_free(local);
1178 ieee80211_led_exit(local);
1179 kfree(local->int_scan_req);
1180 }
1181 EXPORT_SYMBOL(ieee80211_unregister_hw);
1182
1183 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1184 {
1185 WARN_ONCE(1, "Have pending ack frames!\n");
1186 kfree_skb(p);
1187 return 0;
1188 }
1189
1190 void ieee80211_free_hw(struct ieee80211_hw *hw)
1191 {
1192 struct ieee80211_local *local = hw_to_local(hw);
1193
1194 mutex_destroy(&local->iflist_mtx);
1195 mutex_destroy(&local->mtx);
1196
1197 if (local->wiphy_ciphers_allocated)
1198 kfree(local->hw.wiphy->cipher_suites);
1199
1200 idr_for_each(&local->ack_status_frames,
1201 ieee80211_free_ack_frame, NULL);
1202 idr_destroy(&local->ack_status_frames);
1203
1204 kfree(rcu_access_pointer(local->tx_latency));
1205
1206 sta_info_stop(local);
1207
1208 wiphy_free(local->hw.wiphy);
1209 }
1210 EXPORT_SYMBOL(ieee80211_free_hw);
1211
1212 static int __init ieee80211_init(void)
1213 {
1214 struct sk_buff *skb;
1215 int ret;
1216
1217 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1218 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1219 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1220
1221 ret = rc80211_minstrel_init();
1222 if (ret)
1223 return ret;
1224
1225 ret = rc80211_minstrel_ht_init();
1226 if (ret)
1227 goto err_minstrel;
1228
1229 ret = ieee80211_iface_init();
1230 if (ret)
1231 goto err_netdev;
1232
1233 return 0;
1234 err_netdev:
1235 rc80211_minstrel_ht_exit();
1236 err_minstrel:
1237 rc80211_minstrel_exit();
1238
1239 return ret;
1240 }
1241
1242 static void __exit ieee80211_exit(void)
1243 {
1244 rc80211_minstrel_ht_exit();
1245 rc80211_minstrel_exit();
1246
1247 ieee80211s_stop();
1248
1249 ieee80211_iface_exit();
1250
1251 rcu_barrier();
1252 }
1253
1254
1255 subsys_initcall(ieee80211_init);
1256 module_exit(ieee80211_exit);
1257
1258 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1259 MODULE_LICENSE("GPL");
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