Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[linux-2.6-microblaze.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/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38         u64 mc;
39         unsigned int changed_flags;
40         unsigned int new_flags = 0;
41
42         if (atomic_read(&local->iff_allmultis))
43                 new_flags |= FIF_ALLMULTI;
44
45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49         if (local->fif_probe_req || local->probe_req_reg)
50                 new_flags |= FIF_PROBE_REQ;
51
52         if (local->fif_fcsfail)
53                 new_flags |= FIF_FCSFAIL;
54
55         if (local->fif_plcpfail)
56                 new_flags |= FIF_PLCPFAIL;
57
58         if (local->fif_control)
59                 new_flags |= FIF_CONTROL;
60
61         if (local->fif_other_bss)
62                 new_flags |= FIF_OTHER_BSS;
63
64         if (local->fif_pspoll)
65                 new_flags |= FIF_PSPOLL;
66
67         spin_lock_bh(&local->filter_lock);
68         changed_flags = local->filter_flags ^ new_flags;
69
70         mc = drv_prepare_multicast(local, &local->mc_list);
71         spin_unlock_bh(&local->filter_lock);
72
73         /* be a bit nasty */
74         new_flags |= (1<<31);
75
76         drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78         WARN_ON(new_flags & (1<<31));
79
80         local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85         struct ieee80211_local *local =
86                 container_of(work, struct ieee80211_local, reconfig_filter);
87
88         ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93         struct ieee80211_sub_if_data *sdata;
94         struct cfg80211_chan_def chandef = {};
95         u32 changed = 0;
96         int power;
97         u32 offchannel_flag;
98
99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101         if (local->scan_chandef.chan) {
102                 chandef = local->scan_chandef;
103         } else if (local->tmp_channel) {
104                 chandef.chan = local->tmp_channel;
105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106                 chandef.center_freq1 = chandef.chan->center_freq;
107         } else
108                 chandef = local->_oper_chandef;
109
110         WARN(!cfg80211_chandef_valid(&chandef),
111              "control:%d MHz width:%d center: %d/%d MHz",
112              chandef.chan->center_freq, chandef.width,
113              chandef.center_freq1, chandef.center_freq2);
114
115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117         else
118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122         if (offchannel_flag ||
123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
124                                         &local->_oper_chandef)) {
125                 local->hw.conf.chandef = chandef;
126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127         }
128
129         if (!conf_is_ht(&local->hw.conf)) {
130                 /*
131                  * mac80211.h documents that this is only valid
132                  * when the channel is set to an HT type, and
133                  * that otherwise STATIC is used.
134                  */
135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
137                 local->hw.conf.smps_mode = local->smps_mode;
138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
139         }
140
141         power = ieee80211_chandef_max_power(&chandef);
142
143         rcu_read_lock();
144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146                         continue;
147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148                         continue;
149                 power = min(power, sdata->vif.bss_conf.txpower);
150         }
151         rcu_read_unlock();
152
153         if (local->hw.conf.power_level != power) {
154                 changed |= IEEE80211_CONF_CHANGE_POWER;
155                 local->hw.conf.power_level = power;
156         }
157
158         return changed;
159 }
160
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
162 {
163         int ret = 0;
164
165         might_sleep();
166
167         if (!local->use_chanctx)
168                 changed |= ieee80211_hw_conf_chan(local);
169         else
170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171                              IEEE80211_CONF_CHANGE_POWER);
172
173         if (changed && local->open_count) {
174                 ret = drv_config(local, changed);
175                 /*
176                  * Goal:
177                  * HW reconfiguration should never fail, the driver has told
178                  * us what it can support so it should live up to that promise.
179                  *
180                  * Current status:
181                  * rfkill is not integrated with mac80211 and a
182                  * configuration command can thus fail if hardware rfkill
183                  * is enabled
184                  *
185                  * FIXME: integrate rfkill with mac80211 and then add this
186                  * WARN_ON() back
187                  *
188                  */
189                 /* WARN_ON(ret); */
190         }
191
192         return ret;
193 }
194
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
196                                       u32 changed)
197 {
198         struct ieee80211_local *local = sdata->local;
199
200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
201                 return;
202
203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
204 }
205
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207 {
208         sdata->vif.bss_conf.use_cts_prot = false;
209         sdata->vif.bss_conf.use_short_preamble = false;
210         sdata->vif.bss_conf.use_short_slot = false;
211         return BSS_CHANGED_ERP_CTS_PROT |
212                BSS_CHANGED_ERP_PREAMBLE |
213                BSS_CHANGED_ERP_SLOT;
214 }
215
216 static void ieee80211_tasklet_handler(unsigned long data)
217 {
218         struct ieee80211_local *local = (struct ieee80211_local *) data;
219         struct sk_buff *skb;
220
221         while ((skb = skb_dequeue(&local->skb_queue)) ||
222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223                 switch (skb->pkt_type) {
224                 case IEEE80211_RX_MSG:
225                         /* Clear skb->pkt_type in order to not confuse kernel
226                          * netstack. */
227                         skb->pkt_type = 0;
228                         ieee80211_rx(&local->hw, skb);
229                         break;
230                 case IEEE80211_TX_STATUS_MSG:
231                         skb->pkt_type = 0;
232                         ieee80211_tx_status(&local->hw, skb);
233                         break;
234                 default:
235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
236                              skb->pkt_type);
237                         dev_kfree_skb(skb);
238                         break;
239                 }
240         }
241 }
242
243 static void ieee80211_restart_work(struct work_struct *work)
244 {
245         struct ieee80211_local *local =
246                 container_of(work, struct ieee80211_local, restart_work);
247         struct ieee80211_sub_if_data *sdata;
248
249         /* wait for scan work complete */
250         flush_workqueue(local->workqueue);
251         flush_work(&local->sched_scan_stopped_work);
252
253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254              "%s called with hardware scan in progress\n", __func__);
255
256         rtnl_lock();
257         list_for_each_entry(sdata, &local->interfaces, list)
258                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
259         ieee80211_scan_cancel(local);
260
261         /* make sure any new ROC will consider local->in_reconfig */
262         flush_delayed_work(&local->roc_work);
263         flush_work(&local->hw_roc_done);
264
265         ieee80211_reconfig(local);
266         rtnl_unlock();
267 }
268
269 void ieee80211_restart_hw(struct ieee80211_hw *hw)
270 {
271         struct ieee80211_local *local = hw_to_local(hw);
272
273         trace_api_restart_hw(local);
274
275         wiphy_info(hw->wiphy,
276                    "Hardware restart was requested\n");
277
278         /* use this reason, ieee80211_reconfig will unblock it */
279         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
280                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
281                                         false);
282
283         /*
284          * Stop all Rx during the reconfig. We don't want state changes
285          * or driver callbacks while this is in progress.
286          */
287         local->in_reconfig = true;
288         barrier();
289
290         queue_work(system_freezable_wq, &local->restart_work);
291 }
292 EXPORT_SYMBOL(ieee80211_restart_hw);
293
294 #ifdef CONFIG_INET
295 static int ieee80211_ifa_changed(struct notifier_block *nb,
296                                  unsigned long data, void *arg)
297 {
298         struct in_ifaddr *ifa = arg;
299         struct ieee80211_local *local =
300                 container_of(nb, struct ieee80211_local,
301                              ifa_notifier);
302         struct net_device *ndev = ifa->ifa_dev->dev;
303         struct wireless_dev *wdev = ndev->ieee80211_ptr;
304         struct in_device *idev;
305         struct ieee80211_sub_if_data *sdata;
306         struct ieee80211_bss_conf *bss_conf;
307         struct ieee80211_if_managed *ifmgd;
308         int c = 0;
309
310         /* Make sure it's our interface that got changed */
311         if (!wdev)
312                 return NOTIFY_DONE;
313
314         if (wdev->wiphy != local->hw.wiphy)
315                 return NOTIFY_DONE;
316
317         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
318         bss_conf = &sdata->vif.bss_conf;
319
320         /* ARP filtering is only supported in managed mode */
321         if (sdata->vif.type != NL80211_IFTYPE_STATION)
322                 return NOTIFY_DONE;
323
324         idev = __in_dev_get_rtnl(sdata->dev);
325         if (!idev)
326                 return NOTIFY_DONE;
327
328         ifmgd = &sdata->u.mgd;
329         sdata_lock(sdata);
330
331         /* Copy the addresses to the bss_conf list */
332         ifa = idev->ifa_list;
333         while (ifa) {
334                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
335                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
336                 ifa = ifa->ifa_next;
337                 c++;
338         }
339
340         bss_conf->arp_addr_cnt = c;
341
342         /* Configure driver only if associated (which also implies it is up) */
343         if (ifmgd->associated)
344                 ieee80211_bss_info_change_notify(sdata,
345                                                  BSS_CHANGED_ARP_FILTER);
346
347         sdata_unlock(sdata);
348
349         return NOTIFY_OK;
350 }
351 #endif
352
353 #if IS_ENABLED(CONFIG_IPV6)
354 static int ieee80211_ifa6_changed(struct notifier_block *nb,
355                                   unsigned long data, void *arg)
356 {
357         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
358         struct inet6_dev *idev = ifa->idev;
359         struct net_device *ndev = ifa->idev->dev;
360         struct ieee80211_local *local =
361                 container_of(nb, struct ieee80211_local, ifa6_notifier);
362         struct wireless_dev *wdev = ndev->ieee80211_ptr;
363         struct ieee80211_sub_if_data *sdata;
364
365         /* Make sure it's our interface that got changed */
366         if (!wdev || wdev->wiphy != local->hw.wiphy)
367                 return NOTIFY_DONE;
368
369         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
370
371         /*
372          * For now only support station mode. This is mostly because
373          * doing AP would have to handle AP_VLAN in some way ...
374          */
375         if (sdata->vif.type != NL80211_IFTYPE_STATION)
376                 return NOTIFY_DONE;
377
378         drv_ipv6_addr_change(local, sdata, idev);
379
380         return NOTIFY_OK;
381 }
382 #endif
383
384 /* There isn't a lot of sense in it, but you can transmit anything you like */
385 static const struct ieee80211_txrx_stypes
386 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
387         [NL80211_IFTYPE_ADHOC] = {
388                 .tx = 0xffff,
389                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
390                         BIT(IEEE80211_STYPE_AUTH >> 4) |
391                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
392                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
393         },
394         [NL80211_IFTYPE_STATION] = {
395                 .tx = 0xffff,
396                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
397                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
398         },
399         [NL80211_IFTYPE_AP] = {
400                 .tx = 0xffff,
401                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
402                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
403                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
404                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
405                         BIT(IEEE80211_STYPE_AUTH >> 4) |
406                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
407                         BIT(IEEE80211_STYPE_ACTION >> 4),
408         },
409         [NL80211_IFTYPE_AP_VLAN] = {
410                 /* copy AP */
411                 .tx = 0xffff,
412                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
413                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
414                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
415                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
416                         BIT(IEEE80211_STYPE_AUTH >> 4) |
417                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
418                         BIT(IEEE80211_STYPE_ACTION >> 4),
419         },
420         [NL80211_IFTYPE_P2P_CLIENT] = {
421                 .tx = 0xffff,
422                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
423                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
424         },
425         [NL80211_IFTYPE_P2P_GO] = {
426                 .tx = 0xffff,
427                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
428                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
429                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
430                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
431                         BIT(IEEE80211_STYPE_AUTH >> 4) |
432                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
433                         BIT(IEEE80211_STYPE_ACTION >> 4),
434         },
435         [NL80211_IFTYPE_MESH_POINT] = {
436                 .tx = 0xffff,
437                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438                         BIT(IEEE80211_STYPE_AUTH >> 4) |
439                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
440         },
441         [NL80211_IFTYPE_P2P_DEVICE] = {
442                 .tx = 0xffff,
443                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
444                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
445         },
446 };
447
448 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
449         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
450                              IEEE80211_HT_AMPDU_PARM_DENSITY,
451
452         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
453                                 IEEE80211_HT_CAP_MAX_AMSDU |
454                                 IEEE80211_HT_CAP_SGI_20 |
455                                 IEEE80211_HT_CAP_SGI_40 |
456                                 IEEE80211_HT_CAP_LDPC_CODING |
457                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
458         .mcs = {
459                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
460                              0xff, 0xff, 0xff, 0xff, 0xff, },
461         },
462 };
463
464 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
465         .vht_cap_info =
466                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
467                             IEEE80211_VHT_CAP_SHORT_GI_80 |
468                             IEEE80211_VHT_CAP_SHORT_GI_160 |
469                             IEEE80211_VHT_CAP_RXSTBC_1 |
470                             IEEE80211_VHT_CAP_RXSTBC_2 |
471                             IEEE80211_VHT_CAP_RXSTBC_3 |
472                             IEEE80211_VHT_CAP_RXSTBC_4 |
473                             IEEE80211_VHT_CAP_TXSTBC |
474                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
475                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
476                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
477                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
478                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
479         .supp_mcs = {
480                 .rx_mcs_map = cpu_to_le16(~0),
481                 .tx_mcs_map = cpu_to_le16(~0),
482         },
483 };
484
485 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
486                                            const struct ieee80211_ops *ops,
487                                            const char *requested_name)
488 {
489         struct ieee80211_local *local;
490         int priv_size, i;
491         struct wiphy *wiphy;
492         bool use_chanctx;
493
494         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
495                     !ops->add_interface || !ops->remove_interface ||
496                     !ops->configure_filter))
497                 return NULL;
498
499         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
500                 return NULL;
501
502         /* check all or no channel context operations exist */
503         i = !!ops->add_chanctx + !!ops->remove_chanctx +
504             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
505             !!ops->unassign_vif_chanctx;
506         if (WARN_ON(i != 0 && i != 5))
507                 return NULL;
508         use_chanctx = i == 5;
509
510         /* Ensure 32-byte alignment of our private data and hw private data.
511          * We use the wiphy priv data for both our ieee80211_local and for
512          * the driver's private data
513          *
514          * In memory it'll be like this:
515          *
516          * +-------------------------+
517          * | struct wiphy           |
518          * +-------------------------+
519          * | struct ieee80211_local  |
520          * +-------------------------+
521          * | driver's private data   |
522          * +-------------------------+
523          *
524          */
525         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
526
527         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
528
529         if (!wiphy)
530                 return NULL;
531
532         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
533
534         wiphy->privid = mac80211_wiphy_privid;
535
536         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
537                         WIPHY_FLAG_4ADDR_AP |
538                         WIPHY_FLAG_4ADDR_STATION |
539                         WIPHY_FLAG_REPORTS_OBSS |
540                         WIPHY_FLAG_OFFCHAN_TX;
541
542         if (ops->remain_on_channel)
543                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
544
545         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
546                            NL80211_FEATURE_SAE |
547                            NL80211_FEATURE_HT_IBSS |
548                            NL80211_FEATURE_VIF_TXPOWER |
549                            NL80211_FEATURE_MAC_ON_CREATE |
550                            NL80211_FEATURE_USERSPACE_MPM |
551                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
552
553         if (!ops->hw_scan)
554                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
555                                    NL80211_FEATURE_AP_SCAN;
556
557
558         if (!ops->set_key)
559                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
560
561         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
562
563         local = wiphy_priv(wiphy);
564
565         if (sta_info_init(local))
566                 goto err_free;
567
568         local->hw.wiphy = wiphy;
569
570         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
571
572         local->ops = ops;
573         local->use_chanctx = use_chanctx;
574
575         /* set up some defaults */
576         local->hw.queues = 1;
577         local->hw.max_rates = 1;
578         local->hw.max_report_rates = 0;
579         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
580         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
581         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
582         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
583         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
584         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
585                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
586                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
587         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
588                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
589         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
590         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
591         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
592         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
593         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
594
595         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
596
597         wiphy->extended_capabilities = local->ext_capa;
598         wiphy->extended_capabilities_mask = local->ext_capa;
599         wiphy->extended_capabilities_len =
600                 ARRAY_SIZE(local->ext_capa);
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->rx_path_lock);
612         spin_lock_init(&local->queue_stop_reason_lock);
613
614         INIT_LIST_HEAD(&local->chanctx_list);
615         mutex_init(&local->chanctx_mtx);
616
617         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
618
619         INIT_WORK(&local->restart_work, ieee80211_restart_work);
620
621         INIT_WORK(&local->radar_detected_work,
622                   ieee80211_dfs_radar_detected_work);
623
624         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
625         local->smps_mode = IEEE80211_SMPS_OFF;
626
627         INIT_WORK(&local->dynamic_ps_enable_work,
628                   ieee80211_dynamic_ps_enable_work);
629         INIT_WORK(&local->dynamic_ps_disable_work,
630                   ieee80211_dynamic_ps_disable_work);
631         setup_timer(&local->dynamic_ps_timer,
632                     ieee80211_dynamic_ps_timer, (unsigned long) local);
633
634         INIT_WORK(&local->sched_scan_stopped_work,
635                   ieee80211_sched_scan_stopped_work);
636
637         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
638
639         spin_lock_init(&local->ack_status_lock);
640         idr_init(&local->ack_status_frames);
641
642         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
643                 skb_queue_head_init(&local->pending[i]);
644                 atomic_set(&local->agg_queue_stop[i], 0);
645         }
646         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
647                      (unsigned long)local);
648
649         tasklet_init(&local->tasklet,
650                      ieee80211_tasklet_handler,
651                      (unsigned long) local);
652
653         skb_queue_head_init(&local->skb_queue);
654         skb_queue_head_init(&local->skb_queue_unreliable);
655         skb_queue_head_init(&local->skb_queue_tdls_chsw);
656
657         ieee80211_alloc_led_names(local);
658
659         ieee80211_roc_setup(local);
660
661         return &local->hw;
662  err_free:
663         wiphy_free(wiphy);
664         return NULL;
665 }
666 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
667
668 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
669 {
670         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
671                           IS_ERR(local->wep_rx_tfm));
672         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
673         int n_suites = 0, r = 0, w = 0;
674         u32 *suites;
675         static const u32 cipher_suites[] = {
676                 /* keep WEP first, it may be removed below */
677                 WLAN_CIPHER_SUITE_WEP40,
678                 WLAN_CIPHER_SUITE_WEP104,
679                 WLAN_CIPHER_SUITE_TKIP,
680                 WLAN_CIPHER_SUITE_CCMP,
681                 WLAN_CIPHER_SUITE_CCMP_256,
682                 WLAN_CIPHER_SUITE_GCMP,
683                 WLAN_CIPHER_SUITE_GCMP_256,
684
685                 /* keep last -- depends on hw flags! */
686                 WLAN_CIPHER_SUITE_AES_CMAC,
687                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
688                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
689                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
690         };
691
692         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
693             local->hw.wiphy->cipher_suites) {
694                 /* If the driver advertises, or doesn't support SW crypto,
695                  * we only need to remove WEP if necessary.
696                  */
697                 if (have_wep)
698                         return 0;
699
700                 /* well if it has _no_ ciphers ... fine */
701                 if (!local->hw.wiphy->n_cipher_suites)
702                         return 0;
703
704                 /* Driver provides cipher suites, but we need to exclude WEP */
705                 suites = kmemdup(local->hw.wiphy->cipher_suites,
706                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
707                                  GFP_KERNEL);
708                 if (!suites)
709                         return -ENOMEM;
710
711                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
712                         u32 suite = local->hw.wiphy->cipher_suites[r];
713
714                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
715                             suite == WLAN_CIPHER_SUITE_WEP104)
716                                 continue;
717                         suites[w++] = suite;
718                 }
719         } else if (!local->hw.cipher_schemes) {
720                 /* If the driver doesn't have cipher schemes, there's nothing
721                  * else to do other than assign the (software supported and
722                  * perhaps offloaded) cipher suites.
723                  */
724                 local->hw.wiphy->cipher_suites = cipher_suites;
725                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
726
727                 if (!have_mfp)
728                         local->hw.wiphy->n_cipher_suites -= 4;
729
730                 if (!have_wep) {
731                         local->hw.wiphy->cipher_suites += 2;
732                         local->hw.wiphy->n_cipher_suites -= 2;
733                 }
734
735                 /* not dynamically allocated, so just return */
736                 return 0;
737         } else {
738                 const struct ieee80211_cipher_scheme *cs;
739
740                 cs = local->hw.cipher_schemes;
741
742                 /* Driver specifies cipher schemes only (but not cipher suites
743                  * including the schemes)
744                  *
745                  * We start counting ciphers defined by schemes, TKIP, CCMP,
746                  * CCMP-256, GCMP, and GCMP-256
747                  */
748                 n_suites = local->hw.n_cipher_schemes + 5;
749
750                 /* check if we have WEP40 and WEP104 */
751                 if (have_wep)
752                         n_suites += 2;
753
754                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
755                  * BIP-GMAC-256
756                  */
757                 if (have_mfp)
758                         n_suites += 4;
759
760                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
761                 if (!suites)
762                         return -ENOMEM;
763
764                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
765                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
766                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
767                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
768                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
769
770                 if (have_wep) {
771                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
772                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
773                 }
774
775                 if (have_mfp) {
776                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
777                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
778                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
779                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
780                 }
781
782                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
783                         suites[w++] = cs[r].cipher;
784                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
785                                 kfree(suites);
786                                 return -EINVAL;
787                         }
788                 }
789         }
790
791         local->hw.wiphy->cipher_suites = suites;
792         local->hw.wiphy->n_cipher_suites = w;
793         local->wiphy_ciphers_allocated = true;
794
795         return 0;
796 }
797
798 int ieee80211_register_hw(struct ieee80211_hw *hw)
799 {
800         struct ieee80211_local *local = hw_to_local(hw);
801         int result, i;
802         enum ieee80211_band band;
803         int channels, max_bitrates;
804         bool supp_ht, supp_vht;
805         netdev_features_t feature_whitelist;
806         struct cfg80211_chan_def dflt_chandef = {};
807
808         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
809             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
810              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
811                 return -EINVAL;
812
813         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
814             (!local->ops->tdls_channel_switch ||
815              !local->ops->tdls_cancel_channel_switch ||
816              !local->ops->tdls_recv_channel_switch))
817                 return -EOPNOTSUPP;
818
819 #ifdef CONFIG_PM
820         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
821                 return -EINVAL;
822 #endif
823
824         if (!local->use_chanctx) {
825                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
826                         const struct ieee80211_iface_combination *comb;
827
828                         comb = &local->hw.wiphy->iface_combinations[i];
829
830                         if (comb->num_different_channels > 1)
831                                 return -EINVAL;
832                 }
833         } else {
834                 /*
835                  * WDS is currently prohibited when channel contexts are used
836                  * because there's no clear definition of which channel WDS
837                  * type interfaces use
838                  */
839                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
840                         return -EINVAL;
841
842                 /* DFS is not supported with multi-channel combinations yet */
843                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
844                         const struct ieee80211_iface_combination *comb;
845
846                         comb = &local->hw.wiphy->iface_combinations[i];
847
848                         if (comb->radar_detect_widths &&
849                             comb->num_different_channels > 1)
850                                 return -EINVAL;
851                 }
852         }
853
854         /* Only HW csum features are currently compatible with mac80211 */
855         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
856                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
857                             NETIF_F_GSO_SOFTWARE;
858         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
859                 return -EINVAL;
860
861         if (hw->max_report_rates == 0)
862                 hw->max_report_rates = hw->max_rates;
863
864         local->rx_chains = 1;
865
866         /*
867          * generic code guarantees at least one band,
868          * set this very early because much code assumes
869          * that hw.conf.channel is assigned
870          */
871         channels = 0;
872         max_bitrates = 0;
873         supp_ht = false;
874         supp_vht = false;
875         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
876                 struct ieee80211_supported_band *sband;
877
878                 sband = local->hw.wiphy->bands[band];
879                 if (!sband)
880                         continue;
881
882                 if (!dflt_chandef.chan) {
883                         cfg80211_chandef_create(&dflt_chandef,
884                                                 &sband->channels[0],
885                                                 NL80211_CHAN_NO_HT);
886                         /* init channel we're on */
887                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
888                                 local->hw.conf.chandef = dflt_chandef;
889                                 local->_oper_chandef = dflt_chandef;
890                         }
891                         local->monitor_chandef = dflt_chandef;
892                 }
893
894                 channels += sband->n_channels;
895
896                 if (max_bitrates < sband->n_bitrates)
897                         max_bitrates = sband->n_bitrates;
898                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
899                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
900
901                 if (sband->ht_cap.ht_supported)
902                         local->rx_chains =
903                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
904                                     local->rx_chains);
905
906                 /* TODO: consider VHT for RX chains, hopefully it's the same */
907         }
908
909         /* if low-level driver supports AP, we also support VLAN */
910         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
911                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
912                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
913         }
914
915         /* mac80211 always supports monitor */
916         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
917         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
918
919         /* mac80211 doesn't support more than one IBSS interface right now */
920         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
921                 const struct ieee80211_iface_combination *c;
922                 int j;
923
924                 c = &hw->wiphy->iface_combinations[i];
925
926                 for (j = 0; j < c->n_limits; j++)
927                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
928                             c->limits[j].max > 1)
929                                 return -EINVAL;
930         }
931
932         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
933                                       sizeof(void *) * channels, GFP_KERNEL);
934         if (!local->int_scan_req)
935                 return -ENOMEM;
936
937         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
938                 if (!local->hw.wiphy->bands[band])
939                         continue;
940                 local->int_scan_req->rates[band] = (u32) -1;
941         }
942
943 #ifndef CONFIG_MAC80211_MESH
944         /* mesh depends on Kconfig, but drivers should set it if they want */
945         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
946 #endif
947
948         /* if the underlying driver supports mesh, mac80211 will (at least)
949          * provide routing of mesh authentication frames to userspace */
950         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
951                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
952
953         /* mac80211 supports control port protocol changing */
954         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
955
956         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
957                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
958         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
959                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
960                 if (hw->max_signal <= 0) {
961                         result = -EINVAL;
962                         goto fail_wiphy_register;
963                 }
964         }
965
966         /*
967          * Calculate scan IE length -- we need this to alloc
968          * memory and to subtract from the driver limit. It
969          * includes the DS Params, (extended) supported rates, and HT
970          * information -- SSID is the driver's responsibility.
971          */
972         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
973                 3 /* DS Params */;
974         if (supp_ht)
975                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
976
977         if (supp_vht)
978                 local->scan_ies_len +=
979                         2 + sizeof(struct ieee80211_vht_cap);
980
981         if (!local->ops->hw_scan) {
982                 /* For hw_scan, driver needs to set these up. */
983                 local->hw.wiphy->max_scan_ssids = 4;
984                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
985         }
986
987         /*
988          * If the driver supports any scan IEs, then assume the
989          * limit includes the IEs mac80211 will add, otherwise
990          * leave it at zero and let the driver sort it out; we
991          * still pass our IEs to the driver but userspace will
992          * not be allowed to in that case.
993          */
994         if (local->hw.wiphy->max_scan_ie_len)
995                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
996
997         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
998                                          local->hw.n_cipher_schemes));
999
1000         result = ieee80211_init_cipher_suites(local);
1001         if (result < 0)
1002                 goto fail_wiphy_register;
1003
1004         if (!local->ops->remain_on_channel)
1005                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1006
1007         /* mac80211 based drivers don't support internal TDLS setup */
1008         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1009                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1010
1011         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1012         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1013                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1014
1015         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1016
1017         result = wiphy_register(local->hw.wiphy);
1018         if (result < 0)
1019                 goto fail_wiphy_register;
1020
1021         /*
1022          * We use the number of queues for feature tests (QoS, HT) internally
1023          * so restrict them appropriately.
1024          */
1025         if (hw->queues > IEEE80211_MAX_QUEUES)
1026                 hw->queues = IEEE80211_MAX_QUEUES;
1027
1028         local->workqueue =
1029                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1030         if (!local->workqueue) {
1031                 result = -ENOMEM;
1032                 goto fail_workqueue;
1033         }
1034
1035         /*
1036          * The hardware needs headroom for sending the frame,
1037          * and we need some headroom for passing the frame to monitor
1038          * interfaces, but never both at the same time.
1039          */
1040         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1041                                    IEEE80211_TX_STATUS_HEADROOM);
1042
1043         debugfs_hw_add(local);
1044
1045         /*
1046          * if the driver doesn't specify a max listen interval we
1047          * use 5 which should be a safe default
1048          */
1049         if (local->hw.max_listen_interval == 0)
1050                 local->hw.max_listen_interval = 5;
1051
1052         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1053
1054         local->dynamic_ps_forced_timeout = -1;
1055
1056         if (!local->hw.txq_ac_max_pending)
1057                 local->hw.txq_ac_max_pending = 64;
1058
1059         result = ieee80211_wep_init(local);
1060         if (result < 0)
1061                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1062                             result);
1063
1064         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1065
1066         ieee80211_led_init(local);
1067
1068         rtnl_lock();
1069
1070         result = ieee80211_init_rate_ctrl_alg(local,
1071                                               hw->rate_control_algorithm);
1072         if (result < 0) {
1073                 wiphy_debug(local->hw.wiphy,
1074                             "Failed to initialize rate control algorithm\n");
1075                 goto fail_rate;
1076         }
1077
1078         /* add one default STA interface if supported */
1079         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1080             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1081                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1082                                           NL80211_IFTYPE_STATION, NULL);
1083                 if (result)
1084                         wiphy_warn(local->hw.wiphy,
1085                                    "Failed to add default virtual iface\n");
1086         }
1087
1088         rtnl_unlock();
1089
1090 #ifdef CONFIG_INET
1091         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1092         result = register_inetaddr_notifier(&local->ifa_notifier);
1093         if (result)
1094                 goto fail_ifa;
1095 #endif
1096
1097 #if IS_ENABLED(CONFIG_IPV6)
1098         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1099         result = register_inet6addr_notifier(&local->ifa6_notifier);
1100         if (result)
1101                 goto fail_ifa6;
1102 #endif
1103
1104         return 0;
1105
1106 #if IS_ENABLED(CONFIG_IPV6)
1107  fail_ifa6:
1108 #ifdef CONFIG_INET
1109         unregister_inetaddr_notifier(&local->ifa_notifier);
1110 #endif
1111 #endif
1112 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1113  fail_ifa:
1114 #endif
1115         rtnl_lock();
1116         rate_control_deinitialize(local);
1117         ieee80211_remove_interfaces(local);
1118  fail_rate:
1119         rtnl_unlock();
1120         ieee80211_led_exit(local);
1121         ieee80211_wep_free(local);
1122         destroy_workqueue(local->workqueue);
1123  fail_workqueue:
1124         wiphy_unregister(local->hw.wiphy);
1125  fail_wiphy_register:
1126         if (local->wiphy_ciphers_allocated)
1127                 kfree(local->hw.wiphy->cipher_suites);
1128         kfree(local->int_scan_req);
1129         return result;
1130 }
1131 EXPORT_SYMBOL(ieee80211_register_hw);
1132
1133 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1134 {
1135         struct ieee80211_local *local = hw_to_local(hw);
1136
1137         tasklet_kill(&local->tx_pending_tasklet);
1138         tasklet_kill(&local->tasklet);
1139
1140 #ifdef CONFIG_INET
1141         unregister_inetaddr_notifier(&local->ifa_notifier);
1142 #endif
1143 #if IS_ENABLED(CONFIG_IPV6)
1144         unregister_inet6addr_notifier(&local->ifa6_notifier);
1145 #endif
1146
1147         rtnl_lock();
1148
1149         /*
1150          * At this point, interface list manipulations are fine
1151          * because the driver cannot be handing us frames any
1152          * more and the tasklet is killed.
1153          */
1154         ieee80211_remove_interfaces(local);
1155
1156         rtnl_unlock();
1157
1158         cancel_delayed_work_sync(&local->roc_work);
1159         cancel_work_sync(&local->restart_work);
1160         cancel_work_sync(&local->reconfig_filter);
1161         cancel_work_sync(&local->tdls_chsw_work);
1162         flush_work(&local->sched_scan_stopped_work);
1163
1164         ieee80211_clear_tx_pending(local);
1165         rate_control_deinitialize(local);
1166
1167         if (skb_queue_len(&local->skb_queue) ||
1168             skb_queue_len(&local->skb_queue_unreliable))
1169                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1170         skb_queue_purge(&local->skb_queue);
1171         skb_queue_purge(&local->skb_queue_unreliable);
1172         skb_queue_purge(&local->skb_queue_tdls_chsw);
1173
1174         destroy_workqueue(local->workqueue);
1175         wiphy_unregister(local->hw.wiphy);
1176         ieee80211_wep_free(local);
1177         ieee80211_led_exit(local);
1178         kfree(local->int_scan_req);
1179 }
1180 EXPORT_SYMBOL(ieee80211_unregister_hw);
1181
1182 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1183 {
1184         WARN_ONCE(1, "Have pending ack frames!\n");
1185         kfree_skb(p);
1186         return 0;
1187 }
1188
1189 void ieee80211_free_hw(struct ieee80211_hw *hw)
1190 {
1191         struct ieee80211_local *local = hw_to_local(hw);
1192
1193         mutex_destroy(&local->iflist_mtx);
1194         mutex_destroy(&local->mtx);
1195
1196         if (local->wiphy_ciphers_allocated)
1197                 kfree(local->hw.wiphy->cipher_suites);
1198
1199         idr_for_each(&local->ack_status_frames,
1200                      ieee80211_free_ack_frame, NULL);
1201         idr_destroy(&local->ack_status_frames);
1202
1203         sta_info_stop(local);
1204
1205         ieee80211_free_led_names(local);
1206
1207         wiphy_free(local->hw.wiphy);
1208 }
1209 EXPORT_SYMBOL(ieee80211_free_hw);
1210
1211 static int __init ieee80211_init(void)
1212 {
1213         struct sk_buff *skb;
1214         int ret;
1215
1216         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1217         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1218                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1219
1220         ret = rc80211_minstrel_init();
1221         if (ret)
1222                 return ret;
1223
1224         ret = rc80211_minstrel_ht_init();
1225         if (ret)
1226                 goto err_minstrel;
1227
1228         ret = ieee80211_iface_init();
1229         if (ret)
1230                 goto err_netdev;
1231
1232         return 0;
1233  err_netdev:
1234         rc80211_minstrel_ht_exit();
1235  err_minstrel:
1236         rc80211_minstrel_exit();
1237
1238         return ret;
1239 }
1240
1241 static void __exit ieee80211_exit(void)
1242 {
1243         rc80211_minstrel_ht_exit();
1244         rc80211_minstrel_exit();
1245
1246         ieee80211s_stop();
1247
1248         ieee80211_iface_exit();
1249
1250         rcu_barrier();
1251 }
1252
1253
1254 subsys_initcall(ieee80211_init);
1255 module_exit(ieee80211_exit);
1256
1257 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1258 MODULE_LICENSE("GPL");