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staging: octeon-usb: make driver name to match the file name
[linux-2.6/btrfs-unstable.git] / net / mac80211 / main.c
blob8190bf27ebfff8b0a594b7c029130dc9b1b99957
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38 u64 mc;
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
41
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
44
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
51
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
54
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
57
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
60
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
63
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
66
67 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
69
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
72
73 /* be a bit nasty */
74 new_flags |= (1<<31);
75
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78 WARN_ON(new_flags & (1<<31));
79
80 local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
87
88 ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
95 u32 changed = 0;
96 int power;
97 u32 offchannel_flag;
98
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
107 } else
108 chandef = local->_oper_chandef;
109
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
114
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117 else
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127 }
128
129 if (!conf_is_ht(&local->hw.conf)) {
130 /*
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
134 */
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
139 }
140
141 power = ieee80211_chandef_max_power(&chandef);
142
143 rcu_read_lock();
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146 continue;
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148 continue;
149 power = min(power, sdata->vif.bss_conf.txpower);
150 }
151 rcu_read_unlock();
152
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
156 }
157
158 return changed;
159 }
160
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
162 {
163 int ret = 0;
164
165 might_sleep();
166
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
169 else
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
172
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
175 /*
176 * Goal:
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
179 *
180 * Current status:
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
183 * is enabled
184 *
185 * FIXME: integrate rfkill with mac80211 and then add this
186 * WARN_ON() back
187 *
188 */
189 /* WARN_ON(ret); */
190 }
191
192 return ret;
193 }
194
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
196 u32 changed)
197 {
198 struct ieee80211_local *local = sdata->local;
199
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
201 return;
202
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
204 }
205
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207 {
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
214 }
215
216 static void ieee80211_tasklet_handler(unsigned long data)
217 {
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
219 struct sk_buff *skb;
220
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
226 * netstack. */
227 skb->pkt_type = 0;
228 ieee80211_rx(&local->hw, skb);
229 break;
230 case IEEE80211_TX_STATUS_MSG:
231 skb->pkt_type = 0;
232 ieee80211_tx_status(&local->hw, skb);
233 break;
234 default:
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
236 skb->pkt_type);
237 dev_kfree_skb(skb);
238 break;
239 }
240 }
241 }
242
243 static void ieee80211_restart_work(struct work_struct *work)
244 {
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
248
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251 flush_work(&local->sched_scan_stopped_work);
252
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
255
256 rtnl_lock();
257 list_for_each_entry(sdata, &local->interfaces, list)
258 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
259 ieee80211_scan_cancel(local);
260
261 /* make sure any new ROC will consider local->in_reconfig */
262 flush_delayed_work(&local->roc_work);
263 flush_work(&local->hw_roc_done);
264
265 ieee80211_reconfig(local);
266 rtnl_unlock();
267 }
268
269 void ieee80211_restart_hw(struct ieee80211_hw *hw)
270 {
271 struct ieee80211_local *local = hw_to_local(hw);
272
273 trace_api_restart_hw(local);
274
275 wiphy_info(hw->wiphy,
276 "Hardware restart was requested\n");
277
278 /* use this reason, ieee80211_reconfig will unblock it */
279 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
280 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
281 false);
282
283 /*
284 * Stop all Rx during the reconfig. We don't want state changes
285 * or driver callbacks while this is in progress.
286 */
287 local->in_reconfig = true;
288 barrier();
289
290 queue_work(system_freezable_wq, &local->restart_work);
291 }
292 EXPORT_SYMBOL(ieee80211_restart_hw);
293
294 #ifdef CONFIG_INET
295 static int ieee80211_ifa_changed(struct notifier_block *nb,
296 unsigned long data, void *arg)
297 {
298 struct in_ifaddr *ifa = arg;
299 struct ieee80211_local *local =
300 container_of(nb, struct ieee80211_local,
301 ifa_notifier);
302 struct net_device *ndev = ifa->ifa_dev->dev;
303 struct wireless_dev *wdev = ndev->ieee80211_ptr;
304 struct in_device *idev;
305 struct ieee80211_sub_if_data *sdata;
306 struct ieee80211_bss_conf *bss_conf;
307 struct ieee80211_if_managed *ifmgd;
308 int c = 0;
309
310 /* Make sure it's our interface that got changed */
311 if (!wdev)
312 return NOTIFY_DONE;
313
314 if (wdev->wiphy != local->hw.wiphy)
315 return NOTIFY_DONE;
316
317 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
318 bss_conf = &sdata->vif.bss_conf;
319
320 /* ARP filtering is only supported in managed mode */
321 if (sdata->vif.type != NL80211_IFTYPE_STATION)
322 return NOTIFY_DONE;
323
324 idev = __in_dev_get_rtnl(sdata->dev);
325 if (!idev)
326 return NOTIFY_DONE;
327
328 ifmgd = &sdata->u.mgd;
329 sdata_lock(sdata);
330
331 /* Copy the addresses to the bss_conf list */
332 ifa = idev->ifa_list;
333 while (ifa) {
334 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
335 bss_conf->arp_addr_list[c] = ifa->ifa_address;
336 ifa = ifa->ifa_next;
337 c++;
338 }
339
340 bss_conf->arp_addr_cnt = c;
341
342 /* Configure driver only if associated (which also implies it is up) */
343 if (ifmgd->associated)
344 ieee80211_bss_info_change_notify(sdata,
345 BSS_CHANGED_ARP_FILTER);
346
347 sdata_unlock(sdata);
348
349 return NOTIFY_OK;
350 }
351 #endif
352
353 #if IS_ENABLED(CONFIG_IPV6)
354 static int ieee80211_ifa6_changed(struct notifier_block *nb,
355 unsigned long data, void *arg)
356 {
357 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
358 struct inet6_dev *idev = ifa->idev;
359 struct net_device *ndev = ifa->idev->dev;
360 struct ieee80211_local *local =
361 container_of(nb, struct ieee80211_local, ifa6_notifier);
362 struct wireless_dev *wdev = ndev->ieee80211_ptr;
363 struct ieee80211_sub_if_data *sdata;
364
365 /* Make sure it's our interface that got changed */
366 if (!wdev || wdev->wiphy != local->hw.wiphy)
367 return NOTIFY_DONE;
368
369 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
370
371 /*
372 * For now only support station mode. This is mostly because
373 * doing AP would have to handle AP_VLAN in some way ...
374 */
375 if (sdata->vif.type != NL80211_IFTYPE_STATION)
376 return NOTIFY_DONE;
377
378 drv_ipv6_addr_change(local, sdata, idev);
379
380 return NOTIFY_OK;
381 }
382 #endif
383
384 /* There isn't a lot of sense in it, but you can transmit anything you like */
385 static const struct ieee80211_txrx_stypes
386 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
387 [NL80211_IFTYPE_ADHOC] = {
388 .tx = 0xffff,
389 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
390 BIT(IEEE80211_STYPE_AUTH >> 4) |
391 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
392 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
393 },
394 [NL80211_IFTYPE_STATION] = {
395 .tx = 0xffff,
396 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
398 },
399 [NL80211_IFTYPE_AP] = {
400 .tx = 0xffff,
401 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
402 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
403 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
404 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
405 BIT(IEEE80211_STYPE_AUTH >> 4) |
406 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
407 BIT(IEEE80211_STYPE_ACTION >> 4),
408 },
409 [NL80211_IFTYPE_AP_VLAN] = {
410 /* copy AP */
411 .tx = 0xffff,
412 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
413 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
414 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
415 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
416 BIT(IEEE80211_STYPE_AUTH >> 4) |
417 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
418 BIT(IEEE80211_STYPE_ACTION >> 4),
419 },
420 [NL80211_IFTYPE_P2P_CLIENT] = {
421 .tx = 0xffff,
422 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
424 },
425 [NL80211_IFTYPE_P2P_GO] = {
426 .tx = 0xffff,
427 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
428 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
429 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
430 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
431 BIT(IEEE80211_STYPE_AUTH >> 4) |
432 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
433 BIT(IEEE80211_STYPE_ACTION >> 4),
434 },
435 [NL80211_IFTYPE_MESH_POINT] = {
436 .tx = 0xffff,
437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438 BIT(IEEE80211_STYPE_AUTH >> 4) |
439 BIT(IEEE80211_STYPE_DEAUTH >> 4),
440 },
441 [NL80211_IFTYPE_P2P_DEVICE] = {
442 .tx = 0xffff,
443 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
444 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
445 },
446 };
447
448 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
449 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
450 IEEE80211_HT_AMPDU_PARM_DENSITY,
451
452 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
453 IEEE80211_HT_CAP_MAX_AMSDU |
454 IEEE80211_HT_CAP_SGI_20 |
455 IEEE80211_HT_CAP_SGI_40 |
456 IEEE80211_HT_CAP_LDPC_CODING |
457 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
458 .mcs = {
459 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
460 0xff, 0xff, 0xff, 0xff, 0xff, },
461 },
462 };
463
464 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
465 .vht_cap_info =
466 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
467 IEEE80211_VHT_CAP_SHORT_GI_80 |
468 IEEE80211_VHT_CAP_SHORT_GI_160 |
469 IEEE80211_VHT_CAP_RXSTBC_1 |
470 IEEE80211_VHT_CAP_RXSTBC_2 |
471 IEEE80211_VHT_CAP_RXSTBC_3 |
472 IEEE80211_VHT_CAP_RXSTBC_4 |
473 IEEE80211_VHT_CAP_TXSTBC |
474 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
475 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
476 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
477 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
478 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
479 .supp_mcs = {
480 .rx_mcs_map = cpu_to_le16(~0),
481 .tx_mcs_map = cpu_to_le16(~0),
482 },
483 };
484
485 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
486 const struct ieee80211_ops *ops,
487 const char *requested_name)
488 {
489 struct ieee80211_local *local;
490 int priv_size, i;
491 struct wiphy *wiphy;
492 bool use_chanctx;
493
494 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
495 !ops->add_interface || !ops->remove_interface ||
496 !ops->configure_filter))
497 return NULL;
498
499 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
500 return NULL;
501
502 /* check all or no channel context operations exist */
503 i = !!ops->add_chanctx + !!ops->remove_chanctx +
504 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
505 !!ops->unassign_vif_chanctx;
506 if (WARN_ON(i != 0 && i != 5))
507 return NULL;
508 use_chanctx = i == 5;
509
510 /* Ensure 32-byte alignment of our private data and hw private data.
511 * We use the wiphy priv data for both our ieee80211_local and for
512 * the driver's private data
513 *
514 * In memory it'll be like this:
515 *
516 * +-------------------------+
517 * | struct wiphy |
518 * +-------------------------+
519 * | struct ieee80211_local |
520 * +-------------------------+
521 * | driver's private data |
522 * +-------------------------+
523 *
524 */
525 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
526
527 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
528
529 if (!wiphy)
530 return NULL;
531
532 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
533
534 wiphy->privid = mac80211_wiphy_privid;
535
536 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
537 WIPHY_FLAG_4ADDR_AP |
538 WIPHY_FLAG_4ADDR_STATION |
539 WIPHY_FLAG_REPORTS_OBSS |
540 WIPHY_FLAG_OFFCHAN_TX;
541
542 if (ops->remain_on_channel)
543 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
544
545 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
546 NL80211_FEATURE_SAE |
547 NL80211_FEATURE_HT_IBSS |
548 NL80211_FEATURE_VIF_TXPOWER |
549 NL80211_FEATURE_MAC_ON_CREATE |
550 NL80211_FEATURE_USERSPACE_MPM |
551 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
552
553 if (!ops->hw_scan)
554 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
555 NL80211_FEATURE_AP_SCAN;
556
557
558 if (!ops->set_key)
559 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
560
561 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
562
563 local = wiphy_priv(wiphy);
564
565 if (sta_info_init(local))
566 goto err_free;
567
568 local->hw.wiphy = wiphy;
569
570 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
571
572 local->ops = ops;
573 local->use_chanctx = use_chanctx;
574
575 /* set up some defaults */
576 local->hw.queues = 1;
577 local->hw.max_rates = 1;
578 local->hw.max_report_rates = 0;
579 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
580 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
581 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
582 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
583 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
584 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
585 IEEE80211_RADIOTAP_MCS_HAVE_GI |
586 IEEE80211_RADIOTAP_MCS_HAVE_BW;
587 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
588 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
589 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
590 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
591 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
592 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
593 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
594
595 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
596
597 wiphy->extended_capabilities = local->ext_capa;
598 wiphy->extended_capabilities_mask = local->ext_capa;
599 wiphy->extended_capabilities_len =
600 ARRAY_SIZE(local->ext_capa);
601
602 INIT_LIST_HEAD(&local->interfaces);
603
604 __hw_addr_init(&local->mc_list);
605
606 mutex_init(&local->iflist_mtx);
607 mutex_init(&local->mtx);
608
609 mutex_init(&local->key_mtx);
610 spin_lock_init(&local->filter_lock);
611 spin_lock_init(&local->rx_path_lock);
612 spin_lock_init(&local->queue_stop_reason_lock);
613
614 INIT_LIST_HEAD(&local->chanctx_list);
615 mutex_init(&local->chanctx_mtx);
616
617 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
618
619 INIT_WORK(&local->restart_work, ieee80211_restart_work);
620
621 INIT_WORK(&local->radar_detected_work,
622 ieee80211_dfs_radar_detected_work);
623
624 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
625 local->smps_mode = IEEE80211_SMPS_OFF;
626
627 INIT_WORK(&local->dynamic_ps_enable_work,
628 ieee80211_dynamic_ps_enable_work);
629 INIT_WORK(&local->dynamic_ps_disable_work,
630 ieee80211_dynamic_ps_disable_work);
631 setup_timer(&local->dynamic_ps_timer,
632 ieee80211_dynamic_ps_timer, (unsigned long) local);
633
634 INIT_WORK(&local->sched_scan_stopped_work,
635 ieee80211_sched_scan_stopped_work);
636
637 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
638
639 spin_lock_init(&local->ack_status_lock);
640 idr_init(&local->ack_status_frames);
641
642 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
643 skb_queue_head_init(&local->pending[i]);
644 atomic_set(&local->agg_queue_stop[i], 0);
645 }
646 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
647 (unsigned long)local);
648
649 tasklet_init(&local->tasklet,
650 ieee80211_tasklet_handler,
651 (unsigned long) local);
652
653 skb_queue_head_init(&local->skb_queue);
654 skb_queue_head_init(&local->skb_queue_unreliable);
655 skb_queue_head_init(&local->skb_queue_tdls_chsw);
656
657 ieee80211_alloc_led_names(local);
658
659 ieee80211_roc_setup(local);
660
661 return &local->hw;
662 err_free:
663 wiphy_free(wiphy);
664 return NULL;
665 }
666 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
667
668 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
669 {
670 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
671 IS_ERR(local->wep_rx_tfm));
672 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
673 int n_suites = 0, r = 0, w = 0;
674 u32 *suites;
675 static const u32 cipher_suites[] = {
676 /* keep WEP first, it may be removed below */
677 WLAN_CIPHER_SUITE_WEP40,
678 WLAN_CIPHER_SUITE_WEP104,
679 WLAN_CIPHER_SUITE_TKIP,
680 WLAN_CIPHER_SUITE_CCMP,
681 WLAN_CIPHER_SUITE_CCMP_256,
682 WLAN_CIPHER_SUITE_GCMP,
683 WLAN_CIPHER_SUITE_GCMP_256,
684
685 /* keep last -- depends on hw flags! */
686 WLAN_CIPHER_SUITE_AES_CMAC,
687 WLAN_CIPHER_SUITE_BIP_CMAC_256,
688 WLAN_CIPHER_SUITE_BIP_GMAC_128,
689 WLAN_CIPHER_SUITE_BIP_GMAC_256,
690 };
691
692 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
693 local->hw.wiphy->cipher_suites) {
694 /* If the driver advertises, or doesn't support SW crypto,
695 * we only need to remove WEP if necessary.
696 */
697 if (have_wep)
698 return 0;
699
700 /* well if it has _no_ ciphers ... fine */
701 if (!local->hw.wiphy->n_cipher_suites)
702 return 0;
703
704 /* Driver provides cipher suites, but we need to exclude WEP */
705 suites = kmemdup(local->hw.wiphy->cipher_suites,
706 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
707 GFP_KERNEL);
708 if (!suites)
709 return -ENOMEM;
710
711 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
712 u32 suite = local->hw.wiphy->cipher_suites[r];
713
714 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
715 suite == WLAN_CIPHER_SUITE_WEP104)
716 continue;
717 suites[w++] = suite;
718 }
719 } else if (!local->hw.cipher_schemes) {
720 /* If the driver doesn't have cipher schemes, there's nothing
721 * else to do other than assign the (software supported and
722 * perhaps offloaded) cipher suites.
723 */
724 local->hw.wiphy->cipher_suites = cipher_suites;
725 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
726
727 if (!have_mfp)
728 local->hw.wiphy->n_cipher_suites -= 4;
729
730 if (!have_wep) {
731 local->hw.wiphy->cipher_suites += 2;
732 local->hw.wiphy->n_cipher_suites -= 2;
733 }
734
735 /* not dynamically allocated, so just return */
736 return 0;
737 } else {
738 const struct ieee80211_cipher_scheme *cs;
739
740 cs = local->hw.cipher_schemes;
741
742 /* Driver specifies cipher schemes only (but not cipher suites
743 * including the schemes)
744 *
745 * We start counting ciphers defined by schemes, TKIP, CCMP,
746 * CCMP-256, GCMP, and GCMP-256
747 */
748 n_suites = local->hw.n_cipher_schemes + 5;
749
750 /* check if we have WEP40 and WEP104 */
751 if (have_wep)
752 n_suites += 2;
753
754 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
755 * BIP-GMAC-256
756 */
757 if (have_mfp)
758 n_suites += 4;
759
760 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
761 if (!suites)
762 return -ENOMEM;
763
764 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
765 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
766 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
767 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
768 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
769
770 if (have_wep) {
771 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
772 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
773 }
774
775 if (have_mfp) {
776 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
777 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
778 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
779 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
780 }
781
782 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
783 suites[w++] = cs[r].cipher;
784 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
785 kfree(suites);
786 return -EINVAL;
787 }
788 }
789 }
790
791 local->hw.wiphy->cipher_suites = suites;
792 local->hw.wiphy->n_cipher_suites = w;
793 local->wiphy_ciphers_allocated = true;
794
795 return 0;
796 }
797
798 int ieee80211_register_hw(struct ieee80211_hw *hw)
799 {
800 struct ieee80211_local *local = hw_to_local(hw);
801 int result, i;
802 enum ieee80211_band band;
803 int channels, max_bitrates;
804 bool supp_ht, supp_vht;
805 netdev_features_t feature_whitelist;
806 struct cfg80211_chan_def dflt_chandef = {};
807
808 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
809 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
810 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
811 return -EINVAL;
812
813 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
814 (!local->ops->tdls_channel_switch ||
815 !local->ops->tdls_cancel_channel_switch ||
816 !local->ops->tdls_recv_channel_switch))
817 return -EOPNOTSUPP;
818
819 #ifdef CONFIG_PM
820 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
821 return -EINVAL;
822 #endif
823
824 if (!local->use_chanctx) {
825 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
826 const struct ieee80211_iface_combination *comb;
827
828 comb = &local->hw.wiphy->iface_combinations[i];
829
830 if (comb->num_different_channels > 1)
831 return -EINVAL;
832 }
833 } else {
834 /*
835 * WDS is currently prohibited when channel contexts are used
836 * because there's no clear definition of which channel WDS
837 * type interfaces use
838 */
839 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
840 return -EINVAL;
841
842 /* DFS is not supported with multi-channel combinations yet */
843 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
844 const struct ieee80211_iface_combination *comb;
845
846 comb = &local->hw.wiphy->iface_combinations[i];
847
848 if (comb->radar_detect_widths &&
849 comb->num_different_channels > 1)
850 return -EINVAL;
851 }
852 }
853
854 /* Only HW csum features are currently compatible with mac80211 */
855 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
856 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
857 NETIF_F_GSO_SOFTWARE;
858 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
859 return -EINVAL;
860
861 if (hw->max_report_rates == 0)
862 hw->max_report_rates = hw->max_rates;
863
864 local->rx_chains = 1;
865
866 /*
867 * generic code guarantees at least one band,
868 * set this very early because much code assumes
869 * that hw.conf.channel is assigned
870 */
871 channels = 0;
872 max_bitrates = 0;
873 supp_ht = false;
874 supp_vht = false;
875 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
876 struct ieee80211_supported_band *sband;
877
878 sband = local->hw.wiphy->bands[band];
879 if (!sband)
880 continue;
881
882 if (!dflt_chandef.chan) {
883 cfg80211_chandef_create(&dflt_chandef,
884 &sband->channels[0],
885 NL80211_CHAN_NO_HT);
886 /* init channel we're on */
887 if (!local->use_chanctx && !local->_oper_chandef.chan) {
888 local->hw.conf.chandef = dflt_chandef;
889 local->_oper_chandef = dflt_chandef;
890 }
891 local->monitor_chandef = dflt_chandef;
892 }
893
894 channels += sband->n_channels;
895
896 if (max_bitrates < sband->n_bitrates)
897 max_bitrates = sband->n_bitrates;
898 supp_ht = supp_ht || sband->ht_cap.ht_supported;
899 supp_vht = supp_vht || sband->vht_cap.vht_supported;
900
901 if (sband->ht_cap.ht_supported)
902 local->rx_chains =
903 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
904 local->rx_chains);
905
906 /* TODO: consider VHT for RX chains, hopefully it's the same */
907 }
908
909 /* if low-level driver supports AP, we also support VLAN */
910 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
911 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
912 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
913 }
914
915 /* mac80211 always supports monitor */
916 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
917 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
918
919 /* mac80211 doesn't support more than one IBSS interface right now */
920 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
921 const struct ieee80211_iface_combination *c;
922 int j;
923
924 c = &hw->wiphy->iface_combinations[i];
925
926 for (j = 0; j < c->n_limits; j++)
927 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
928 c->limits[j].max > 1)
929 return -EINVAL;
930 }
931
932 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
933 sizeof(void *) * channels, GFP_KERNEL);
934 if (!local->int_scan_req)
935 return -ENOMEM;
936
937 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
938 if (!local->hw.wiphy->bands[band])
939 continue;
940 local->int_scan_req->rates[band] = (u32) -1;
941 }
942
943 #ifndef CONFIG_MAC80211_MESH
944 /* mesh depends on Kconfig, but drivers should set it if they want */
945 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
946 #endif
947
948 /* if the underlying driver supports mesh, mac80211 will (at least)
949 * provide routing of mesh authentication frames to userspace */
950 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
951 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
952
953 /* mac80211 supports control port protocol changing */
954 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
955
956 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
957 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
958 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
959 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
960 if (hw->max_signal <= 0) {
961 result = -EINVAL;
962 goto fail_wiphy_register;
963 }
964 }
965
966 /*
967 * Calculate scan IE length -- we need this to alloc
968 * memory and to subtract from the driver limit. It
969 * includes the DS Params, (extended) supported rates, and HT
970 * information -- SSID is the driver's responsibility.
971 */
972 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
973 3 /* DS Params */;
974 if (supp_ht)
975 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
976
977 if (supp_vht)
978 local->scan_ies_len +=
979 2 + sizeof(struct ieee80211_vht_cap);
980
981 if (!local->ops->hw_scan) {
982 /* For hw_scan, driver needs to set these up. */
983 local->hw.wiphy->max_scan_ssids = 4;
984 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
985 }
986
987 /*
988 * If the driver supports any scan IEs, then assume the
989 * limit includes the IEs mac80211 will add, otherwise
990 * leave it at zero and let the driver sort it out; we
991 * still pass our IEs to the driver but userspace will
992 * not be allowed to in that case.
993 */
994 if (local->hw.wiphy->max_scan_ie_len)
995 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
996
997 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
998 local->hw.n_cipher_schemes));
999
1000 result = ieee80211_init_cipher_suites(local);
1001 if (result < 0)
1002 goto fail_wiphy_register;
1003
1004 if (!local->ops->remain_on_channel)
1005 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1006
1007 /* mac80211 based drivers don't support internal TDLS setup */
1008 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1009 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1010
1011 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1012 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1013 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1014
1015 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1016
1017 result = wiphy_register(local->hw.wiphy);
1018 if (result < 0)
1019 goto fail_wiphy_register;
1020
1021 /*
1022 * We use the number of queues for feature tests (QoS, HT) internally
1023 * so restrict them appropriately.
1024 */
1025 if (hw->queues > IEEE80211_MAX_QUEUES)
1026 hw->queues = IEEE80211_MAX_QUEUES;
1027
1028 local->workqueue =
1029 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1030 if (!local->workqueue) {
1031 result = -ENOMEM;
1032 goto fail_workqueue;
1033 }
1034
1035 /*
1036 * The hardware needs headroom for sending the frame,
1037 * and we need some headroom for passing the frame to monitor
1038 * interfaces, but never both at the same time.
1039 */
1040 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1041 IEEE80211_TX_STATUS_HEADROOM);
1042
1043 debugfs_hw_add(local);
1044
1045 /*
1046 * if the driver doesn't specify a max listen interval we
1047 * use 5 which should be a safe default
1048 */
1049 if (local->hw.max_listen_interval == 0)
1050 local->hw.max_listen_interval = 5;
1051
1052 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1053
1054 local->dynamic_ps_forced_timeout = -1;
1055
1056 if (!local->hw.txq_ac_max_pending)
1057 local->hw.txq_ac_max_pending = 64;
1058
1059 result = ieee80211_wep_init(local);
1060 if (result < 0)
1061 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1062 result);
1063
1064 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1065
1066 ieee80211_led_init(local);
1067
1068 rtnl_lock();
1069
1070 result = ieee80211_init_rate_ctrl_alg(local,
1071 hw->rate_control_algorithm);
1072 if (result < 0) {
1073 wiphy_debug(local->hw.wiphy,
1074 "Failed to initialize rate control algorithm\n");
1075 goto fail_rate;
1076 }
1077
1078 /* add one default STA interface if supported */
1079 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1080 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1081 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1082 NL80211_IFTYPE_STATION, NULL);
1083 if (result)
1084 wiphy_warn(local->hw.wiphy,
1085 "Failed to add default virtual iface\n");
1086 }
1087
1088 rtnl_unlock();
1089
1090 #ifdef CONFIG_INET
1091 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1092 result = register_inetaddr_notifier(&local->ifa_notifier);
1093 if (result)
1094 goto fail_ifa;
1095 #endif
1096
1097 #if IS_ENABLED(CONFIG_IPV6)
1098 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1099 result = register_inet6addr_notifier(&local->ifa6_notifier);
1100 if (result)
1101 goto fail_ifa6;
1102 #endif
1103
1104 return 0;
1105
1106 #if IS_ENABLED(CONFIG_IPV6)
1107 fail_ifa6:
1108 #ifdef CONFIG_INET
1109 unregister_inetaddr_notifier(&local->ifa_notifier);
1110 #endif
1111 #endif
1112 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1113 fail_ifa:
1114 #endif
1115 rtnl_lock();
1116 rate_control_deinitialize(local);
1117 ieee80211_remove_interfaces(local);
1118 fail_rate:
1119 rtnl_unlock();
1120 ieee80211_led_exit(local);
1121 ieee80211_wep_free(local);
1122 destroy_workqueue(local->workqueue);
1123 fail_workqueue:
1124 wiphy_unregister(local->hw.wiphy);
1125 fail_wiphy_register:
1126 if (local->wiphy_ciphers_allocated)
1127 kfree(local->hw.wiphy->cipher_suites);
1128 kfree(local->int_scan_req);
1129 return result;
1130 }
1131 EXPORT_SYMBOL(ieee80211_register_hw);
1132
1133 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1134 {
1135 struct ieee80211_local *local = hw_to_local(hw);
1136
1137 tasklet_kill(&local->tx_pending_tasklet);
1138 tasklet_kill(&local->tasklet);
1139
1140 #ifdef CONFIG_INET
1141 unregister_inetaddr_notifier(&local->ifa_notifier);
1142 #endif
1143 #if IS_ENABLED(CONFIG_IPV6)
1144 unregister_inet6addr_notifier(&local->ifa6_notifier);
1145 #endif
1146
1147 rtnl_lock();
1148
1149 /*
1150 * At this point, interface list manipulations are fine
1151 * because the driver cannot be handing us frames any
1152 * more and the tasklet is killed.
1153 */
1154 ieee80211_remove_interfaces(local);
1155
1156 rtnl_unlock();
1157
1158 cancel_delayed_work_sync(&local->roc_work);
1159 cancel_work_sync(&local->restart_work);
1160 cancel_work_sync(&local->reconfig_filter);
1161 cancel_work_sync(&local->tdls_chsw_work);
1162 flush_work(&local->sched_scan_stopped_work);
1163
1164 ieee80211_clear_tx_pending(local);
1165 rate_control_deinitialize(local);
1166
1167 if (skb_queue_len(&local->skb_queue) ||
1168 skb_queue_len(&local->skb_queue_unreliable))
1169 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1170 skb_queue_purge(&local->skb_queue);
1171 skb_queue_purge(&local->skb_queue_unreliable);
1172 skb_queue_purge(&local->skb_queue_tdls_chsw);
1173
1174 destroy_workqueue(local->workqueue);
1175 wiphy_unregister(local->hw.wiphy);
1176 ieee80211_wep_free(local);
1177 ieee80211_led_exit(local);
1178 kfree(local->int_scan_req);
1179 }
1180 EXPORT_SYMBOL(ieee80211_unregister_hw);
1181
1182 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1183 {
1184 WARN_ONCE(1, "Have pending ack frames!\n");
1185 kfree_skb(p);
1186 return 0;
1187 }
1188
1189 void ieee80211_free_hw(struct ieee80211_hw *hw)
1190 {
1191 struct ieee80211_local *local = hw_to_local(hw);
1192
1193 mutex_destroy(&local->iflist_mtx);
1194 mutex_destroy(&local->mtx);
1195
1196 if (local->wiphy_ciphers_allocated)
1197 kfree(local->hw.wiphy->cipher_suites);
1198
1199 idr_for_each(&local->ack_status_frames,
1200 ieee80211_free_ack_frame, NULL);
1201 idr_destroy(&local->ack_status_frames);
1202
1203 sta_info_stop(local);
1204
1205 ieee80211_free_led_names(local);
1206
1207 wiphy_free(local->hw.wiphy);
1208 }
1209 EXPORT_SYMBOL(ieee80211_free_hw);
1210
1211 static int __init ieee80211_init(void)
1212 {
1213 struct sk_buff *skb;
1214 int ret;
1215
1216 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1217 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1218 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1219
1220 ret = rc80211_minstrel_init();
1221 if (ret)
1222 return ret;
1223
1224 ret = rc80211_minstrel_ht_init();
1225 if (ret)
1226 goto err_minstrel;
1227
1228 ret = ieee80211_iface_init();
1229 if (ret)
1230 goto err_netdev;
1231
1232 return 0;
1233 err_netdev:
1234 rc80211_minstrel_ht_exit();
1235 err_minstrel:
1236 rc80211_minstrel_exit();
1237
1238 return ret;
1239 }
1240
1241 static void __exit ieee80211_exit(void)
1242 {
1243 rc80211_minstrel_ht_exit();
1244 rc80211_minstrel_exit();
1245
1246 ieee80211s_stop();
1247
1248 ieee80211_iface_exit();
1249
1250 rcu_barrier();
1251 }
1252
1253
1254 subsys_initcall(ieee80211_init);
1255 module_exit(ieee80211_exit);
1256
1257 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1258 MODULE_LICENSE("GPL");
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