Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / 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         if (sta_info_init(local))
561                 goto err_free;
562
563         local->hw.wiphy = wiphy;
564
565         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
566
567         local->ops = ops;
568         local->use_chanctx = use_chanctx;
569
570         /* set up some defaults */
571         local->hw.queues = 1;
572         local->hw.max_rates = 1;
573         local->hw.max_report_rates = 0;
574         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
575         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
576         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
577         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
578         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
579         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
580                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
581                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
582         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
583                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
584         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
585         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
586         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
587         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
588         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
589
590         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
591
592         wiphy->extended_capabilities = local->ext_capa;
593         wiphy->extended_capabilities_mask = local->ext_capa;
594         wiphy->extended_capabilities_len =
595                 ARRAY_SIZE(local->ext_capa);
596
597         INIT_LIST_HEAD(&local->interfaces);
598
599         __hw_addr_init(&local->mc_list);
600
601         mutex_init(&local->iflist_mtx);
602         mutex_init(&local->mtx);
603
604         mutex_init(&local->key_mtx);
605         spin_lock_init(&local->filter_lock);
606         spin_lock_init(&local->rx_path_lock);
607         spin_lock_init(&local->queue_stop_reason_lock);
608
609         INIT_LIST_HEAD(&local->chanctx_list);
610         mutex_init(&local->chanctx_mtx);
611
612         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
613
614         INIT_WORK(&local->restart_work, ieee80211_restart_work);
615
616         INIT_WORK(&local->radar_detected_work,
617                   ieee80211_dfs_radar_detected_work);
618
619         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
620         local->smps_mode = IEEE80211_SMPS_OFF;
621
622         INIT_WORK(&local->dynamic_ps_enable_work,
623                   ieee80211_dynamic_ps_enable_work);
624         INIT_WORK(&local->dynamic_ps_disable_work,
625                   ieee80211_dynamic_ps_disable_work);
626         setup_timer(&local->dynamic_ps_timer,
627                     ieee80211_dynamic_ps_timer, (unsigned long) local);
628
629         INIT_WORK(&local->sched_scan_stopped_work,
630                   ieee80211_sched_scan_stopped_work);
631
632         spin_lock_init(&local->ack_status_lock);
633         idr_init(&local->ack_status_frames);
634
635         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
636                 skb_queue_head_init(&local->pending[i]);
637                 atomic_set(&local->agg_queue_stop[i], 0);
638         }
639         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
640                      (unsigned long)local);
641
642         tasklet_init(&local->tasklet,
643                      ieee80211_tasklet_handler,
644                      (unsigned long) local);
645
646         skb_queue_head_init(&local->skb_queue);
647         skb_queue_head_init(&local->skb_queue_unreliable);
648
649         ieee80211_led_names(local);
650
651         ieee80211_roc_setup(local);
652
653         return &local->hw;
654  err_free:
655         wiphy_free(wiphy);
656         return NULL;
657 }
658 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
659
660 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
661 {
662         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
663                           IS_ERR(local->wep_rx_tfm));
664         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
665         int n_suites = 0, r = 0, w = 0;
666         u32 *suites;
667         static const u32 cipher_suites[] = {
668                 /* keep WEP first, it may be removed below */
669                 WLAN_CIPHER_SUITE_WEP40,
670                 WLAN_CIPHER_SUITE_WEP104,
671                 WLAN_CIPHER_SUITE_TKIP,
672                 WLAN_CIPHER_SUITE_CCMP,
673                 WLAN_CIPHER_SUITE_CCMP_256,
674                 WLAN_CIPHER_SUITE_GCMP,
675                 WLAN_CIPHER_SUITE_GCMP_256,
676
677                 /* keep last -- depends on hw flags! */
678                 WLAN_CIPHER_SUITE_AES_CMAC,
679                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
680                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
681                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
682         };
683
684         if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
685             local->hw.wiphy->cipher_suites) {
686                 /* If the driver advertises, or doesn't support SW crypto,
687                  * we only need to remove WEP if necessary.
688                  */
689                 if (have_wep)
690                         return 0;
691
692                 /* well if it has _no_ ciphers ... fine */
693                 if (!local->hw.wiphy->n_cipher_suites)
694                         return 0;
695
696                 /* Driver provides cipher suites, but we need to exclude WEP */
697                 suites = kmemdup(local->hw.wiphy->cipher_suites,
698                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
699                                  GFP_KERNEL);
700                 if (!suites)
701                         return -ENOMEM;
702
703                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
704                         u32 suite = local->hw.wiphy->cipher_suites[r];
705
706                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
707                             suite == WLAN_CIPHER_SUITE_WEP104)
708                                 continue;
709                         suites[w++] = suite;
710                 }
711         } else if (!local->hw.cipher_schemes) {
712                 /* If the driver doesn't have cipher schemes, there's nothing
713                  * else to do other than assign the (software supported and
714                  * perhaps offloaded) cipher suites.
715                  */
716                 local->hw.wiphy->cipher_suites = cipher_suites;
717                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
718
719                 if (!have_mfp)
720                         local->hw.wiphy->n_cipher_suites -= 4;
721
722                 if (!have_wep) {
723                         local->hw.wiphy->cipher_suites += 2;
724                         local->hw.wiphy->n_cipher_suites -= 2;
725                 }
726
727                 /* not dynamically allocated, so just return */
728                 return 0;
729         } else {
730                 const struct ieee80211_cipher_scheme *cs;
731
732                 cs = local->hw.cipher_schemes;
733
734                 /* Driver specifies cipher schemes only (but not cipher suites
735                  * including the schemes)
736                  *
737                  * We start counting ciphers defined by schemes, TKIP, CCMP,
738                  * CCMP-256, GCMP, and GCMP-256
739                  */
740                 n_suites = local->hw.n_cipher_schemes + 5;
741
742                 /* check if we have WEP40 and WEP104 */
743                 if (have_wep)
744                         n_suites += 2;
745
746                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
747                  * BIP-GMAC-256
748                  */
749                 if (have_mfp)
750                         n_suites += 4;
751
752                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
753                 if (!suites)
754                         return -ENOMEM;
755
756                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
757                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
758                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
759                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
760                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
761
762                 if (have_wep) {
763                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
764                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
765                 }
766
767                 if (have_mfp) {
768                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
769                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
770                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
771                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
772                 }
773
774                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
775                         suites[w++] = cs[r].cipher;
776         }
777
778         local->hw.wiphy->cipher_suites = suites;
779         local->hw.wiphy->n_cipher_suites = w;
780         local->wiphy_ciphers_allocated = true;
781
782         return 0;
783 }
784
785 int ieee80211_register_hw(struct ieee80211_hw *hw)
786 {
787         struct ieee80211_local *local = hw_to_local(hw);
788         int result, i;
789         enum ieee80211_band band;
790         int channels, max_bitrates;
791         bool supp_ht, supp_vht;
792         netdev_features_t feature_whitelist;
793         struct cfg80211_chan_def dflt_chandef = {};
794
795         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
796             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
797              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
798                 return -EINVAL;
799
800         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
801             (!local->ops->tdls_channel_switch ||
802              !local->ops->tdls_cancel_channel_switch ||
803              !local->ops->tdls_recv_channel_switch))
804                 return -EOPNOTSUPP;
805
806 #ifdef CONFIG_PM
807         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
808                 return -EINVAL;
809 #endif
810
811         if (!local->use_chanctx) {
812                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
813                         const struct ieee80211_iface_combination *comb;
814
815                         comb = &local->hw.wiphy->iface_combinations[i];
816
817                         if (comb->num_different_channels > 1)
818                                 return -EINVAL;
819                 }
820         } else {
821                 /*
822                  * WDS is currently prohibited when channel contexts are used
823                  * because there's no clear definition of which channel WDS
824                  * type interfaces use
825                  */
826                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
827                         return -EINVAL;
828
829                 /* DFS is not supported with multi-channel combinations yet */
830                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
831                         const struct ieee80211_iface_combination *comb;
832
833                         comb = &local->hw.wiphy->iface_combinations[i];
834
835                         if (comb->radar_detect_widths &&
836                             comb->num_different_channels > 1)
837                                 return -EINVAL;
838                 }
839         }
840
841         /* Only HW csum features are currently compatible with mac80211 */
842         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
843                             NETIF_F_HW_CSUM;
844         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
845                 return -EINVAL;
846
847         if (hw->max_report_rates == 0)
848                 hw->max_report_rates = hw->max_rates;
849
850         local->rx_chains = 1;
851
852         /*
853          * generic code guarantees at least one band,
854          * set this very early because much code assumes
855          * that hw.conf.channel is assigned
856          */
857         channels = 0;
858         max_bitrates = 0;
859         supp_ht = false;
860         supp_vht = false;
861         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
862                 struct ieee80211_supported_band *sband;
863
864                 sband = local->hw.wiphy->bands[band];
865                 if (!sband)
866                         continue;
867
868                 if (!dflt_chandef.chan) {
869                         cfg80211_chandef_create(&dflt_chandef,
870                                                 &sband->channels[0],
871                                                 NL80211_CHAN_NO_HT);
872                         /* init channel we're on */
873                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
874                                 local->hw.conf.chandef = dflt_chandef;
875                                 local->_oper_chandef = dflt_chandef;
876                         }
877                         local->monitor_chandef = dflt_chandef;
878                 }
879
880                 channels += sband->n_channels;
881
882                 if (max_bitrates < sband->n_bitrates)
883                         max_bitrates = sband->n_bitrates;
884                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
885                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
886
887                 if (sband->ht_cap.ht_supported)
888                         local->rx_chains =
889                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
890                                     local->rx_chains);
891
892                 /* TODO: consider VHT for RX chains, hopefully it's the same */
893         }
894
895         /* if low-level driver supports AP, we also support VLAN */
896         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
897                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
898                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
899         }
900
901         /* mac80211 always supports monitor */
902         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
903         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
904
905         /* mac80211 doesn't support more than one IBSS interface right now */
906         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
907                 const struct ieee80211_iface_combination *c;
908                 int j;
909
910                 c = &hw->wiphy->iface_combinations[i];
911
912                 for (j = 0; j < c->n_limits; j++)
913                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
914                             c->limits[j].max > 1)
915                                 return -EINVAL;
916         }
917
918         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
919                                       sizeof(void *) * channels, GFP_KERNEL);
920         if (!local->int_scan_req)
921                 return -ENOMEM;
922
923         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
924                 if (!local->hw.wiphy->bands[band])
925                         continue;
926                 local->int_scan_req->rates[band] = (u32) -1;
927         }
928
929 #ifndef CONFIG_MAC80211_MESH
930         /* mesh depends on Kconfig, but drivers should set it if they want */
931         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
932 #endif
933
934         /* if the underlying driver supports mesh, mac80211 will (at least)
935          * provide routing of mesh authentication frames to userspace */
936         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
937                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
938
939         /* mac80211 supports control port protocol changing */
940         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
941
942         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
943                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
944         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
945                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
946                 if (hw->max_signal <= 0) {
947                         result = -EINVAL;
948                         goto fail_wiphy_register;
949                 }
950         }
951
952         /*
953          * Calculate scan IE length -- we need this to alloc
954          * memory and to subtract from the driver limit. It
955          * includes the DS Params, (extended) supported rates, and HT
956          * information -- SSID is the driver's responsibility.
957          */
958         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
959                 3 /* DS Params */;
960         if (supp_ht)
961                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
962
963         if (supp_vht)
964                 local->scan_ies_len +=
965                         2 + sizeof(struct ieee80211_vht_cap);
966
967         if (!local->ops->hw_scan) {
968                 /* For hw_scan, driver needs to set these up. */
969                 local->hw.wiphy->max_scan_ssids = 4;
970                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
971         }
972
973         /*
974          * If the driver supports any scan IEs, then assume the
975          * limit includes the IEs mac80211 will add, otherwise
976          * leave it at zero and let the driver sort it out; we
977          * still pass our IEs to the driver but userspace will
978          * not be allowed to in that case.
979          */
980         if (local->hw.wiphy->max_scan_ie_len)
981                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
982
983         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
984                                          local->hw.n_cipher_schemes));
985
986         result = ieee80211_init_cipher_suites(local);
987         if (result < 0)
988                 goto fail_wiphy_register;
989
990         if (!local->ops->remain_on_channel)
991                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
992
993         /* mac80211 based drivers don't support internal TDLS setup */
994         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
995                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
996
997         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
998         if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
999                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1000
1001         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1002
1003         result = wiphy_register(local->hw.wiphy);
1004         if (result < 0)
1005                 goto fail_wiphy_register;
1006
1007         /*
1008          * We use the number of queues for feature tests (QoS, HT) internally
1009          * so restrict them appropriately.
1010          */
1011         if (hw->queues > IEEE80211_MAX_QUEUES)
1012                 hw->queues = IEEE80211_MAX_QUEUES;
1013
1014         local->workqueue =
1015                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1016         if (!local->workqueue) {
1017                 result = -ENOMEM;
1018                 goto fail_workqueue;
1019         }
1020
1021         /*
1022          * The hardware needs headroom for sending the frame,
1023          * and we need some headroom for passing the frame to monitor
1024          * interfaces, but never both at the same time.
1025          */
1026         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1027                                    IEEE80211_TX_STATUS_HEADROOM);
1028
1029         debugfs_hw_add(local);
1030
1031         /*
1032          * if the driver doesn't specify a max listen interval we
1033          * use 5 which should be a safe default
1034          */
1035         if (local->hw.max_listen_interval == 0)
1036                 local->hw.max_listen_interval = 5;
1037
1038         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1039
1040         local->dynamic_ps_forced_timeout = -1;
1041
1042         if (!local->hw.txq_ac_max_pending)
1043                 local->hw.txq_ac_max_pending = 64;
1044
1045         result = ieee80211_wep_init(local);
1046         if (result < 0)
1047                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1048                             result);
1049
1050         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1051
1052         ieee80211_led_init(local);
1053
1054         rtnl_lock();
1055
1056         result = ieee80211_init_rate_ctrl_alg(local,
1057                                               hw->rate_control_algorithm);
1058         if (result < 0) {
1059                 wiphy_debug(local->hw.wiphy,
1060                             "Failed to initialize rate control algorithm\n");
1061                 goto fail_rate;
1062         }
1063
1064         /* add one default STA interface if supported */
1065         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1066             !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1067                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1068                                           NL80211_IFTYPE_STATION, NULL);
1069                 if (result)
1070                         wiphy_warn(local->hw.wiphy,
1071                                    "Failed to add default virtual iface\n");
1072         }
1073
1074         rtnl_unlock();
1075
1076         local->network_latency_notifier.notifier_call =
1077                 ieee80211_max_network_latency;
1078         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1079                                      &local->network_latency_notifier);
1080         if (result)
1081                 goto fail_pm_qos;
1082
1083 #ifdef CONFIG_INET
1084         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1085         result = register_inetaddr_notifier(&local->ifa_notifier);
1086         if (result)
1087                 goto fail_ifa;
1088 #endif
1089
1090 #if IS_ENABLED(CONFIG_IPV6)
1091         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1092         result = register_inet6addr_notifier(&local->ifa6_notifier);
1093         if (result)
1094                 goto fail_ifa6;
1095 #endif
1096
1097         return 0;
1098
1099 #if IS_ENABLED(CONFIG_IPV6)
1100  fail_ifa6:
1101 #ifdef CONFIG_INET
1102         unregister_inetaddr_notifier(&local->ifa_notifier);
1103 #endif
1104 #endif
1105 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1106  fail_ifa:
1107         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1108                                &local->network_latency_notifier);
1109 #endif
1110  fail_pm_qos:
1111         rtnl_lock();
1112         rate_control_deinitialize(local);
1113         ieee80211_remove_interfaces(local);
1114  fail_rate:
1115         rtnl_unlock();
1116         ieee80211_led_exit(local);
1117         ieee80211_wep_free(local);
1118         destroy_workqueue(local->workqueue);
1119  fail_workqueue:
1120         wiphy_unregister(local->hw.wiphy);
1121  fail_wiphy_register:
1122         if (local->wiphy_ciphers_allocated)
1123                 kfree(local->hw.wiphy->cipher_suites);
1124         kfree(local->int_scan_req);
1125         return result;
1126 }
1127 EXPORT_SYMBOL(ieee80211_register_hw);
1128
1129 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1130                         struct net_device *napi_dev,
1131                         int (*poll)(struct napi_struct *, int),
1132                         int weight)
1133 {
1134         struct ieee80211_local *local = hw_to_local(hw);
1135
1136         netif_napi_add(napi_dev, napi, poll, weight);
1137         local->napi = napi;
1138 }
1139 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1140
1141 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1142 {
1143         struct ieee80211_local *local = hw_to_local(hw);
1144
1145         tasklet_kill(&local->tx_pending_tasklet);
1146         tasklet_kill(&local->tasklet);
1147
1148         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1149                                &local->network_latency_notifier);
1150 #ifdef CONFIG_INET
1151         unregister_inetaddr_notifier(&local->ifa_notifier);
1152 #endif
1153 #if IS_ENABLED(CONFIG_IPV6)
1154         unregister_inet6addr_notifier(&local->ifa6_notifier);
1155 #endif
1156
1157         rtnl_lock();
1158
1159         /*
1160          * At this point, interface list manipulations are fine
1161          * because the driver cannot be handing us frames any
1162          * more and the tasklet is killed.
1163          */
1164         ieee80211_remove_interfaces(local);
1165
1166         rtnl_unlock();
1167
1168         cancel_work_sync(&local->restart_work);
1169         cancel_work_sync(&local->reconfig_filter);
1170         flush_work(&local->sched_scan_stopped_work);
1171
1172         ieee80211_clear_tx_pending(local);
1173         rate_control_deinitialize(local);
1174
1175         if (skb_queue_len(&local->skb_queue) ||
1176             skb_queue_len(&local->skb_queue_unreliable))
1177                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1178         skb_queue_purge(&local->skb_queue);
1179         skb_queue_purge(&local->skb_queue_unreliable);
1180
1181         destroy_workqueue(local->workqueue);
1182         wiphy_unregister(local->hw.wiphy);
1183         ieee80211_wep_free(local);
1184         ieee80211_led_exit(local);
1185         kfree(local->int_scan_req);
1186 }
1187 EXPORT_SYMBOL(ieee80211_unregister_hw);
1188
1189 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1190 {
1191         WARN_ONCE(1, "Have pending ack frames!\n");
1192         kfree_skb(p);
1193         return 0;
1194 }
1195
1196 void ieee80211_free_hw(struct ieee80211_hw *hw)
1197 {
1198         struct ieee80211_local *local = hw_to_local(hw);
1199
1200         mutex_destroy(&local->iflist_mtx);
1201         mutex_destroy(&local->mtx);
1202
1203         if (local->wiphy_ciphers_allocated)
1204                 kfree(local->hw.wiphy->cipher_suites);
1205
1206         idr_for_each(&local->ack_status_frames,
1207                      ieee80211_free_ack_frame, NULL);
1208         idr_destroy(&local->ack_status_frames);
1209
1210         sta_info_stop(local);
1211
1212         wiphy_free(local->hw.wiphy);
1213 }
1214 EXPORT_SYMBOL(ieee80211_free_hw);
1215
1216 static int __init ieee80211_init(void)
1217 {
1218         struct sk_buff *skb;
1219         int ret;
1220
1221         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1222         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1223                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1224
1225         ret = rc80211_minstrel_init();
1226         if (ret)
1227                 return ret;
1228
1229         ret = rc80211_minstrel_ht_init();
1230         if (ret)
1231                 goto err_minstrel;
1232
1233         ret = ieee80211_iface_init();
1234         if (ret)
1235                 goto err_netdev;
1236
1237         return 0;
1238  err_netdev:
1239         rc80211_minstrel_ht_exit();
1240  err_minstrel:
1241         rc80211_minstrel_exit();
1242
1243         return ret;
1244 }
1245
1246 static void __exit ieee80211_exit(void)
1247 {
1248         rc80211_minstrel_ht_exit();
1249         rc80211_minstrel_exit();
1250
1251         ieee80211s_stop();
1252
1253         ieee80211_iface_exit();
1254
1255         rcu_barrier();
1256 }
1257
1258
1259 subsys_initcall(ieee80211_init);
1260 module_exit(ieee80211_exit);
1261
1262 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1263 MODULE_LICENSE("GPL");