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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
252         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
253              "%s called with hardware scan in progress\n", __func__);
254
255         rtnl_lock();
256         list_for_each_entry(sdata, &local->interfaces, list)
257                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
258         ieee80211_scan_cancel(local);
259         ieee80211_reconfig(local);
260         rtnl_unlock();
261 }
262
263 void ieee80211_restart_hw(struct ieee80211_hw *hw)
264 {
265         struct ieee80211_local *local = hw_to_local(hw);
266
267         trace_api_restart_hw(local);
268
269         wiphy_info(hw->wiphy,
270                    "Hardware restart was requested\n");
271
272         /* use this reason, ieee80211_reconfig will unblock it */
273         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
274                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
275                                         false);
276
277         /*
278          * Stop all Rx during the reconfig. We don't want state changes
279          * or driver callbacks while this is in progress.
280          */
281         local->in_reconfig = true;
282         barrier();
283
284         queue_work(system_freezable_wq, &local->restart_work);
285 }
286 EXPORT_SYMBOL(ieee80211_restart_hw);
287
288 #ifdef CONFIG_INET
289 static int ieee80211_ifa_changed(struct notifier_block *nb,
290                                  unsigned long data, void *arg)
291 {
292         struct in_ifaddr *ifa = arg;
293         struct ieee80211_local *local =
294                 container_of(nb, struct ieee80211_local,
295                              ifa_notifier);
296         struct net_device *ndev = ifa->ifa_dev->dev;
297         struct wireless_dev *wdev = ndev->ieee80211_ptr;
298         struct in_device *idev;
299         struct ieee80211_sub_if_data *sdata;
300         struct ieee80211_bss_conf *bss_conf;
301         struct ieee80211_if_managed *ifmgd;
302         int c = 0;
303
304         /* Make sure it's our interface that got changed */
305         if (!wdev)
306                 return NOTIFY_DONE;
307
308         if (wdev->wiphy != local->hw.wiphy)
309                 return NOTIFY_DONE;
310
311         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
312         bss_conf = &sdata->vif.bss_conf;
313
314         /* ARP filtering is only supported in managed mode */
315         if (sdata->vif.type != NL80211_IFTYPE_STATION)
316                 return NOTIFY_DONE;
317
318         idev = __in_dev_get_rtnl(sdata->dev);
319         if (!idev)
320                 return NOTIFY_DONE;
321
322         ifmgd = &sdata->u.mgd;
323         sdata_lock(sdata);
324
325         /* Copy the addresses to the bss_conf list */
326         ifa = idev->ifa_list;
327         while (ifa) {
328                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
329                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
330                 ifa = ifa->ifa_next;
331                 c++;
332         }
333
334         bss_conf->arp_addr_cnt = c;
335
336         /* Configure driver only if associated (which also implies it is up) */
337         if (ifmgd->associated)
338                 ieee80211_bss_info_change_notify(sdata,
339                                                  BSS_CHANGED_ARP_FILTER);
340
341         sdata_unlock(sdata);
342
343         return NOTIFY_OK;
344 }
345 #endif
346
347 #if IS_ENABLED(CONFIG_IPV6)
348 static int ieee80211_ifa6_changed(struct notifier_block *nb,
349                                   unsigned long data, void *arg)
350 {
351         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
352         struct inet6_dev *idev = ifa->idev;
353         struct net_device *ndev = ifa->idev->dev;
354         struct ieee80211_local *local =
355                 container_of(nb, struct ieee80211_local, ifa6_notifier);
356         struct wireless_dev *wdev = ndev->ieee80211_ptr;
357         struct ieee80211_sub_if_data *sdata;
358
359         /* Make sure it's our interface that got changed */
360         if (!wdev || wdev->wiphy != local->hw.wiphy)
361                 return NOTIFY_DONE;
362
363         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
364
365         /*
366          * For now only support station mode. This is mostly because
367          * doing AP would have to handle AP_VLAN in some way ...
368          */
369         if (sdata->vif.type != NL80211_IFTYPE_STATION)
370                 return NOTIFY_DONE;
371
372         drv_ipv6_addr_change(local, sdata, idev);
373
374         return NOTIFY_OK;
375 }
376 #endif
377
378 /* There isn't a lot of sense in it, but you can transmit anything you like */
379 static const struct ieee80211_txrx_stypes
380 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
381         [NL80211_IFTYPE_ADHOC] = {
382                 .tx = 0xffff,
383                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
384                         BIT(IEEE80211_STYPE_AUTH >> 4) |
385                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
386                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
387         },
388         [NL80211_IFTYPE_STATION] = {
389                 .tx = 0xffff,
390                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
391                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
392         },
393         [NL80211_IFTYPE_AP] = {
394                 .tx = 0xffff,
395                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
396                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
397                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
398                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
399                         BIT(IEEE80211_STYPE_AUTH >> 4) |
400                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
401                         BIT(IEEE80211_STYPE_ACTION >> 4),
402         },
403         [NL80211_IFTYPE_AP_VLAN] = {
404                 /* copy AP */
405                 .tx = 0xffff,
406                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
407                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
408                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
409                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
410                         BIT(IEEE80211_STYPE_AUTH >> 4) |
411                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412                         BIT(IEEE80211_STYPE_ACTION >> 4),
413         },
414         [NL80211_IFTYPE_P2P_CLIENT] = {
415                 .tx = 0xffff,
416                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
417                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418         },
419         [NL80211_IFTYPE_P2P_GO] = {
420                 .tx = 0xffff,
421                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
422                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
423                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
424                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
425                         BIT(IEEE80211_STYPE_AUTH >> 4) |
426                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
427                         BIT(IEEE80211_STYPE_ACTION >> 4),
428         },
429         [NL80211_IFTYPE_MESH_POINT] = {
430                 .tx = 0xffff,
431                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432                         BIT(IEEE80211_STYPE_AUTH >> 4) |
433                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
434         },
435         [NL80211_IFTYPE_P2P_DEVICE] = {
436                 .tx = 0xffff,
437                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
439         },
440 };
441
442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
443         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
444                              IEEE80211_HT_AMPDU_PARM_DENSITY,
445
446         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
447                                 IEEE80211_HT_CAP_MAX_AMSDU |
448                                 IEEE80211_HT_CAP_SGI_20 |
449                                 IEEE80211_HT_CAP_SGI_40 |
450                                 IEEE80211_HT_CAP_LDPC_CODING |
451                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
452         .mcs = {
453                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
454                              0xff, 0xff, 0xff, 0xff, 0xff, },
455         },
456 };
457
458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
459         .vht_cap_info =
460                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
461                             IEEE80211_VHT_CAP_SHORT_GI_80 |
462                             IEEE80211_VHT_CAP_SHORT_GI_160 |
463                             IEEE80211_VHT_CAP_RXSTBC_1 |
464                             IEEE80211_VHT_CAP_RXSTBC_2 |
465                             IEEE80211_VHT_CAP_RXSTBC_3 |
466                             IEEE80211_VHT_CAP_RXSTBC_4 |
467                             IEEE80211_VHT_CAP_TXSTBC |
468                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
469                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
470                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
471                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
472                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
473         .supp_mcs = {
474                 .rx_mcs_map = cpu_to_le16(~0),
475                 .tx_mcs_map = cpu_to_le16(~0),
476         },
477 };
478
479 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
480                                            const struct ieee80211_ops *ops,
481                                            const char *requested_name)
482 {
483         struct ieee80211_local *local;
484         int priv_size, i;
485         struct wiphy *wiphy;
486         bool use_chanctx;
487
488         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
489                     !ops->add_interface || !ops->remove_interface ||
490                     !ops->configure_filter))
491                 return NULL;
492
493         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
494                 return NULL;
495
496         /* check all or no channel context operations exist */
497         i = !!ops->add_chanctx + !!ops->remove_chanctx +
498             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
499             !!ops->unassign_vif_chanctx;
500         if (WARN_ON(i != 0 && i != 5))
501                 return NULL;
502         use_chanctx = i == 5;
503
504         /* Ensure 32-byte alignment of our private data and hw private data.
505          * We use the wiphy priv data for both our ieee80211_local and for
506          * the driver's private data
507          *
508          * In memory it'll be like this:
509          *
510          * +-------------------------+
511          * | struct wiphy           |
512          * +-------------------------+
513          * | struct ieee80211_local  |
514          * +-------------------------+
515          * | driver's private data   |
516          * +-------------------------+
517          *
518          */
519         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
520
521         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
522
523         if (!wiphy)
524                 return NULL;
525
526         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
527
528         wiphy->privid = mac80211_wiphy_privid;
529
530         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
531                         WIPHY_FLAG_4ADDR_AP |
532                         WIPHY_FLAG_4ADDR_STATION |
533                         WIPHY_FLAG_REPORTS_OBSS |
534                         WIPHY_FLAG_OFFCHAN_TX;
535
536         if (ops->remain_on_channel)
537                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
538
539         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
540                            NL80211_FEATURE_SAE |
541                            NL80211_FEATURE_HT_IBSS |
542                            NL80211_FEATURE_VIF_TXPOWER |
543                            NL80211_FEATURE_MAC_ON_CREATE |
544                            NL80211_FEATURE_USERSPACE_MPM |
545                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
546
547         if (!ops->hw_scan)
548                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
549                                    NL80211_FEATURE_AP_SCAN;
550
551
552         if (!ops->set_key)
553                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
554
555         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
556
557         local = wiphy_priv(wiphy);
558
559         if (sta_info_init(local))
560                 goto err_free;
561
562         local->hw.wiphy = wiphy;
563
564         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
565
566         local->ops = ops;
567         local->use_chanctx = use_chanctx;
568
569         /* set up some defaults */
570         local->hw.queues = 1;
571         local->hw.max_rates = 1;
572         local->hw.max_report_rates = 0;
573         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
574         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
575         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
576         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
577         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
578         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
579                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
580                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
581         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
582                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
583         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
584         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
585         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
586         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
587         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
588
589         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
590
591         wiphy->extended_capabilities = local->ext_capa;
592         wiphy->extended_capabilities_mask = local->ext_capa;
593         wiphy->extended_capabilities_len =
594                 ARRAY_SIZE(local->ext_capa);
595
596         INIT_LIST_HEAD(&local->interfaces);
597
598         __hw_addr_init(&local->mc_list);
599
600         mutex_init(&local->iflist_mtx);
601         mutex_init(&local->mtx);
602
603         mutex_init(&local->key_mtx);
604         spin_lock_init(&local->filter_lock);
605         spin_lock_init(&local->rx_path_lock);
606         spin_lock_init(&local->queue_stop_reason_lock);
607
608         INIT_LIST_HEAD(&local->chanctx_list);
609         mutex_init(&local->chanctx_mtx);
610
611         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
612
613         INIT_WORK(&local->restart_work, ieee80211_restart_work);
614
615         INIT_WORK(&local->radar_detected_work,
616                   ieee80211_dfs_radar_detected_work);
617
618         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
619         local->smps_mode = IEEE80211_SMPS_OFF;
620
621         INIT_WORK(&local->dynamic_ps_enable_work,
622                   ieee80211_dynamic_ps_enable_work);
623         INIT_WORK(&local->dynamic_ps_disable_work,
624                   ieee80211_dynamic_ps_disable_work);
625         setup_timer(&local->dynamic_ps_timer,
626                     ieee80211_dynamic_ps_timer, (unsigned long) local);
627
628         INIT_WORK(&local->sched_scan_stopped_work,
629                   ieee80211_sched_scan_stopped_work);
630
631         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
632
633         spin_lock_init(&local->ack_status_lock);
634         idr_init(&local->ack_status_frames);
635
636         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
637                 skb_queue_head_init(&local->pending[i]);
638                 atomic_set(&local->agg_queue_stop[i], 0);
639         }
640         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
641                      (unsigned long)local);
642
643         tasklet_init(&local->tasklet,
644                      ieee80211_tasklet_handler,
645                      (unsigned long) local);
646
647         skb_queue_head_init(&local->skb_queue);
648         skb_queue_head_init(&local->skb_queue_unreliable);
649         skb_queue_head_init(&local->skb_queue_tdls_chsw);
650
651         ieee80211_alloc_led_names(local);
652
653         ieee80211_roc_setup(local);
654
655         return &local->hw;
656  err_free:
657         wiphy_free(wiphy);
658         return NULL;
659 }
660 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
661
662 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
663 {
664         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
665                           IS_ERR(local->wep_rx_tfm));
666         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
667         int n_suites = 0, r = 0, w = 0;
668         u32 *suites;
669         static const u32 cipher_suites[] = {
670                 /* keep WEP first, it may be removed below */
671                 WLAN_CIPHER_SUITE_WEP40,
672                 WLAN_CIPHER_SUITE_WEP104,
673                 WLAN_CIPHER_SUITE_TKIP,
674                 WLAN_CIPHER_SUITE_CCMP,
675                 WLAN_CIPHER_SUITE_CCMP_256,
676                 WLAN_CIPHER_SUITE_GCMP,
677                 WLAN_CIPHER_SUITE_GCMP_256,
678
679                 /* keep last -- depends on hw flags! */
680                 WLAN_CIPHER_SUITE_AES_CMAC,
681                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
682                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
683                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
684         };
685
686         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
687             local->hw.wiphy->cipher_suites) {
688                 /* If the driver advertises, or doesn't support SW crypto,
689                  * we only need to remove WEP if necessary.
690                  */
691                 if (have_wep)
692                         return 0;
693
694                 /* well if it has _no_ ciphers ... fine */
695                 if (!local->hw.wiphy->n_cipher_suites)
696                         return 0;
697
698                 /* Driver provides cipher suites, but we need to exclude WEP */
699                 suites = kmemdup(local->hw.wiphy->cipher_suites,
700                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
701                                  GFP_KERNEL);
702                 if (!suites)
703                         return -ENOMEM;
704
705                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
706                         u32 suite = local->hw.wiphy->cipher_suites[r];
707
708                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
709                             suite == WLAN_CIPHER_SUITE_WEP104)
710                                 continue;
711                         suites[w++] = suite;
712                 }
713         } else if (!local->hw.cipher_schemes) {
714                 /* If the driver doesn't have cipher schemes, there's nothing
715                  * else to do other than assign the (software supported and
716                  * perhaps offloaded) cipher suites.
717                  */
718                 local->hw.wiphy->cipher_suites = cipher_suites;
719                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
720
721                 if (!have_mfp)
722                         local->hw.wiphy->n_cipher_suites -= 4;
723
724                 if (!have_wep) {
725                         local->hw.wiphy->cipher_suites += 2;
726                         local->hw.wiphy->n_cipher_suites -= 2;
727                 }
728
729                 /* not dynamically allocated, so just return */
730                 return 0;
731         } else {
732                 const struct ieee80211_cipher_scheme *cs;
733
734                 cs = local->hw.cipher_schemes;
735
736                 /* Driver specifies cipher schemes only (but not cipher suites
737                  * including the schemes)
738                  *
739                  * We start counting ciphers defined by schemes, TKIP, CCMP,
740                  * CCMP-256, GCMP, and GCMP-256
741                  */
742                 n_suites = local->hw.n_cipher_schemes + 5;
743
744                 /* check if we have WEP40 and WEP104 */
745                 if (have_wep)
746                         n_suites += 2;
747
748                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
749                  * BIP-GMAC-256
750                  */
751                 if (have_mfp)
752                         n_suites += 4;
753
754                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
755                 if (!suites)
756                         return -ENOMEM;
757
758                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
759                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
760                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
761                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
762                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
763
764                 if (have_wep) {
765                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
766                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
767                 }
768
769                 if (have_mfp) {
770                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
771                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
772                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
773                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
774                 }
775
776                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
777                         suites[w++] = cs[r].cipher;
778                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
779                                 kfree(suites);
780                                 return -EINVAL;
781                         }
782                 }
783         }
784
785         local->hw.wiphy->cipher_suites = suites;
786         local->hw.wiphy->n_cipher_suites = w;
787         local->wiphy_ciphers_allocated = true;
788
789         return 0;
790 }
791
792 int ieee80211_register_hw(struct ieee80211_hw *hw)
793 {
794         struct ieee80211_local *local = hw_to_local(hw);
795         int result, i;
796         enum ieee80211_band band;
797         int channels, max_bitrates;
798         bool supp_ht, supp_vht;
799         netdev_features_t feature_whitelist;
800         struct cfg80211_chan_def dflt_chandef = {};
801
802         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
803             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
804              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
805                 return -EINVAL;
806
807         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
808             (!local->ops->tdls_channel_switch ||
809              !local->ops->tdls_cancel_channel_switch ||
810              !local->ops->tdls_recv_channel_switch))
811                 return -EOPNOTSUPP;
812
813 #ifdef CONFIG_PM
814         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
815                 return -EINVAL;
816 #endif
817
818         if (!local->use_chanctx) {
819                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
820                         const struct ieee80211_iface_combination *comb;
821
822                         comb = &local->hw.wiphy->iface_combinations[i];
823
824                         if (comb->num_different_channels > 1)
825                                 return -EINVAL;
826                 }
827         } else {
828                 /*
829                  * WDS is currently prohibited when channel contexts are used
830                  * because there's no clear definition of which channel WDS
831                  * type interfaces use
832                  */
833                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
834                         return -EINVAL;
835
836                 /* DFS is not supported with multi-channel combinations yet */
837                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
838                         const struct ieee80211_iface_combination *comb;
839
840                         comb = &local->hw.wiphy->iface_combinations[i];
841
842                         if (comb->radar_detect_widths &&
843                             comb->num_different_channels > 1)
844                                 return -EINVAL;
845                 }
846         }
847
848         /* Only HW csum features are currently compatible with mac80211 */
849         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
850                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
851                             NETIF_F_GSO_SOFTWARE;
852         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
853                 return -EINVAL;
854
855         if (hw->max_report_rates == 0)
856                 hw->max_report_rates = hw->max_rates;
857
858         local->rx_chains = 1;
859
860         /*
861          * generic code guarantees at least one band,
862          * set this very early because much code assumes
863          * that hw.conf.channel is assigned
864          */
865         channels = 0;
866         max_bitrates = 0;
867         supp_ht = false;
868         supp_vht = false;
869         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
870                 struct ieee80211_supported_band *sband;
871
872                 sband = local->hw.wiphy->bands[band];
873                 if (!sband)
874                         continue;
875
876                 if (!dflt_chandef.chan) {
877                         cfg80211_chandef_create(&dflt_chandef,
878                                                 &sband->channels[0],
879                                                 NL80211_CHAN_NO_HT);
880                         /* init channel we're on */
881                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
882                                 local->hw.conf.chandef = dflt_chandef;
883                                 local->_oper_chandef = dflt_chandef;
884                         }
885                         local->monitor_chandef = dflt_chandef;
886                 }
887
888                 channels += sband->n_channels;
889
890                 if (max_bitrates < sband->n_bitrates)
891                         max_bitrates = sband->n_bitrates;
892                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
893                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
894
895                 if (sband->ht_cap.ht_supported)
896                         local->rx_chains =
897                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
898                                     local->rx_chains);
899
900                 /* TODO: consider VHT for RX chains, hopefully it's the same */
901         }
902
903         /* if low-level driver supports AP, we also support VLAN */
904         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
905                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
906                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
907         }
908
909         /* mac80211 always supports monitor */
910         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
911         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
912
913         /* mac80211 doesn't support more than one IBSS interface right now */
914         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
915                 const struct ieee80211_iface_combination *c;
916                 int j;
917
918                 c = &hw->wiphy->iface_combinations[i];
919
920                 for (j = 0; j < c->n_limits; j++)
921                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
922                             c->limits[j].max > 1)
923                                 return -EINVAL;
924         }
925
926         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
927                                       sizeof(void *) * channels, GFP_KERNEL);
928         if (!local->int_scan_req)
929                 return -ENOMEM;
930
931         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
932                 if (!local->hw.wiphy->bands[band])
933                         continue;
934                 local->int_scan_req->rates[band] = (u32) -1;
935         }
936
937 #ifndef CONFIG_MAC80211_MESH
938         /* mesh depends on Kconfig, but drivers should set it if they want */
939         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
940 #endif
941
942         /* if the underlying driver supports mesh, mac80211 will (at least)
943          * provide routing of mesh authentication frames to userspace */
944         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
945                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
946
947         /* mac80211 supports control port protocol changing */
948         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
949
950         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
951                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
952         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
953                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
954                 if (hw->max_signal <= 0) {
955                         result = -EINVAL;
956                         goto fail_wiphy_register;
957                 }
958         }
959
960         /*
961          * Calculate scan IE length -- we need this to alloc
962          * memory and to subtract from the driver limit. It
963          * includes the DS Params, (extended) supported rates, and HT
964          * information -- SSID is the driver's responsibility.
965          */
966         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
967                 3 /* DS Params */;
968         if (supp_ht)
969                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
970
971         if (supp_vht)
972                 local->scan_ies_len +=
973                         2 + sizeof(struct ieee80211_vht_cap);
974
975         if (!local->ops->hw_scan) {
976                 /* For hw_scan, driver needs to set these up. */
977                 local->hw.wiphy->max_scan_ssids = 4;
978                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
979         }
980
981         /*
982          * If the driver supports any scan IEs, then assume the
983          * limit includes the IEs mac80211 will add, otherwise
984          * leave it at zero and let the driver sort it out; we
985          * still pass our IEs to the driver but userspace will
986          * not be allowed to in that case.
987          */
988         if (local->hw.wiphy->max_scan_ie_len)
989                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
990
991         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
992                                          local->hw.n_cipher_schemes));
993
994         result = ieee80211_init_cipher_suites(local);
995         if (result < 0)
996                 goto fail_wiphy_register;
997
998         if (!local->ops->remain_on_channel)
999                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1000
1001         /* mac80211 based drivers don't support internal TDLS setup */
1002         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1003                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1004
1005         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1006         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1007                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1008
1009         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1010
1011         result = wiphy_register(local->hw.wiphy);
1012         if (result < 0)
1013                 goto fail_wiphy_register;
1014
1015         /*
1016          * We use the number of queues for feature tests (QoS, HT) internally
1017          * so restrict them appropriately.
1018          */
1019         if (hw->queues > IEEE80211_MAX_QUEUES)
1020                 hw->queues = IEEE80211_MAX_QUEUES;
1021
1022         local->workqueue =
1023                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1024         if (!local->workqueue) {
1025                 result = -ENOMEM;
1026                 goto fail_workqueue;
1027         }
1028
1029         /*
1030          * The hardware needs headroom for sending the frame,
1031          * and we need some headroom for passing the frame to monitor
1032          * interfaces, but never both at the same time.
1033          */
1034         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1035                                    IEEE80211_TX_STATUS_HEADROOM);
1036
1037         debugfs_hw_add(local);
1038
1039         /*
1040          * if the driver doesn't specify a max listen interval we
1041          * use 5 which should be a safe default
1042          */
1043         if (local->hw.max_listen_interval == 0)
1044                 local->hw.max_listen_interval = 5;
1045
1046         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1047
1048         local->dynamic_ps_forced_timeout = -1;
1049
1050         if (!local->hw.txq_ac_max_pending)
1051                 local->hw.txq_ac_max_pending = 64;
1052
1053         result = ieee80211_wep_init(local);
1054         if (result < 0)
1055                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1056                             result);
1057
1058         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1059
1060         ieee80211_led_init(local);
1061
1062         rtnl_lock();
1063
1064         result = ieee80211_init_rate_ctrl_alg(local,
1065                                               hw->rate_control_algorithm);
1066         if (result < 0) {
1067                 wiphy_debug(local->hw.wiphy,
1068                             "Failed to initialize rate control algorithm\n");
1069                 goto fail_rate;
1070         }
1071
1072         /* add one default STA interface if supported */
1073         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1074             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1075                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1076                                           NL80211_IFTYPE_STATION, NULL);
1077                 if (result)
1078                         wiphy_warn(local->hw.wiphy,
1079                                    "Failed to add default virtual iface\n");
1080         }
1081
1082         rtnl_unlock();
1083
1084 #ifdef CONFIG_INET
1085         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1086         result = register_inetaddr_notifier(&local->ifa_notifier);
1087         if (result)
1088                 goto fail_ifa;
1089 #endif
1090
1091 #if IS_ENABLED(CONFIG_IPV6)
1092         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1093         result = register_inet6addr_notifier(&local->ifa6_notifier);
1094         if (result)
1095                 goto fail_ifa6;
1096 #endif
1097
1098         return 0;
1099
1100 #if IS_ENABLED(CONFIG_IPV6)
1101  fail_ifa6:
1102 #ifdef CONFIG_INET
1103         unregister_inetaddr_notifier(&local->ifa_notifier);
1104 #endif
1105 #endif
1106 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1107  fail_ifa:
1108 #endif
1109         rtnl_lock();
1110         rate_control_deinitialize(local);
1111         ieee80211_remove_interfaces(local);
1112  fail_rate:
1113         rtnl_unlock();
1114         ieee80211_led_exit(local);
1115         ieee80211_wep_free(local);
1116         destroy_workqueue(local->workqueue);
1117  fail_workqueue:
1118         wiphy_unregister(local->hw.wiphy);
1119  fail_wiphy_register:
1120         if (local->wiphy_ciphers_allocated)
1121                 kfree(local->hw.wiphy->cipher_suites);
1122         kfree(local->int_scan_req);
1123         return result;
1124 }
1125 EXPORT_SYMBOL(ieee80211_register_hw);
1126
1127 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1128 {
1129         struct ieee80211_local *local = hw_to_local(hw);
1130
1131         tasklet_kill(&local->tx_pending_tasklet);
1132         tasklet_kill(&local->tasklet);
1133
1134 #ifdef CONFIG_INET
1135         unregister_inetaddr_notifier(&local->ifa_notifier);
1136 #endif
1137 #if IS_ENABLED(CONFIG_IPV6)
1138         unregister_inet6addr_notifier(&local->ifa6_notifier);
1139 #endif
1140
1141         rtnl_lock();
1142
1143         /*
1144          * At this point, interface list manipulations are fine
1145          * because the driver cannot be handing us frames any
1146          * more and the tasklet is killed.
1147          */
1148         ieee80211_remove_interfaces(local);
1149
1150         rtnl_unlock();
1151
1152         cancel_delayed_work_sync(&local->roc_work);
1153         cancel_work_sync(&local->restart_work);
1154         cancel_work_sync(&local->reconfig_filter);
1155         cancel_work_sync(&local->tdls_chsw_work);
1156         flush_work(&local->sched_scan_stopped_work);
1157
1158         ieee80211_clear_tx_pending(local);
1159         rate_control_deinitialize(local);
1160
1161         if (skb_queue_len(&local->skb_queue) ||
1162             skb_queue_len(&local->skb_queue_unreliable))
1163                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1164         skb_queue_purge(&local->skb_queue);
1165         skb_queue_purge(&local->skb_queue_unreliable);
1166         skb_queue_purge(&local->skb_queue_tdls_chsw);
1167
1168         destroy_workqueue(local->workqueue);
1169         wiphy_unregister(local->hw.wiphy);
1170         ieee80211_wep_free(local);
1171         ieee80211_led_exit(local);
1172         kfree(local->int_scan_req);
1173 }
1174 EXPORT_SYMBOL(ieee80211_unregister_hw);
1175
1176 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1177 {
1178         WARN_ONCE(1, "Have pending ack frames!\n");
1179         kfree_skb(p);
1180         return 0;
1181 }
1182
1183 void ieee80211_free_hw(struct ieee80211_hw *hw)
1184 {
1185         struct ieee80211_local *local = hw_to_local(hw);
1186
1187         mutex_destroy(&local->iflist_mtx);
1188         mutex_destroy(&local->mtx);
1189
1190         if (local->wiphy_ciphers_allocated)
1191                 kfree(local->hw.wiphy->cipher_suites);
1192
1193         idr_for_each(&local->ack_status_frames,
1194                      ieee80211_free_ack_frame, NULL);
1195         idr_destroy(&local->ack_status_frames);
1196
1197         sta_info_stop(local);
1198
1199         ieee80211_free_led_names(local);
1200
1201         wiphy_free(local->hw.wiphy);
1202 }
1203 EXPORT_SYMBOL(ieee80211_free_hw);
1204
1205 static int __init ieee80211_init(void)
1206 {
1207         struct sk_buff *skb;
1208         int ret;
1209
1210         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1211         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1212                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1213
1214         ret = rc80211_minstrel_init();
1215         if (ret)
1216                 return ret;
1217
1218         ret = rc80211_minstrel_ht_init();
1219         if (ret)
1220                 goto err_minstrel;
1221
1222         ret = ieee80211_iface_init();
1223         if (ret)
1224                 goto err_netdev;
1225
1226         return 0;
1227  err_netdev:
1228         rc80211_minstrel_ht_exit();
1229  err_minstrel:
1230         rc80211_minstrel_exit();
1231
1232         return ret;
1233 }
1234
1235 static void __exit ieee80211_exit(void)
1236 {
1237         rc80211_minstrel_ht_exit();
1238         rc80211_minstrel_exit();
1239
1240         ieee80211s_stop();
1241
1242         ieee80211_iface_exit();
1243
1244         rcu_barrier();
1245 }
1246
1247
1248 subsys_initcall(ieee80211_init);
1249 module_exit(ieee80211_exit);
1250
1251 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1252 MODULE_LICENSE("GPL");