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mac80211: make LED trigger names const
[deliverable/linux.git] / net / mac80211 / main.c
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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/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
38void 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_allmultis))
45 new_flags |= FIF_ALLMULTI;
46
47 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
48 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
49 new_flags |= FIF_BCN_PRBRESP_PROMISC;
50
51 if (local->fif_probe_req || local->probe_req_reg)
52 new_flags |= FIF_PROBE_REQ;
53
54 if (local->fif_fcsfail)
55 new_flags |= FIF_FCSFAIL;
56
57 if (local->fif_plcpfail)
58 new_flags |= FIF_PLCPFAIL;
59
60 if (local->fif_control)
61 new_flags |= FIF_CONTROL;
62
63 if (local->fif_other_bss)
64 new_flags |= FIF_OTHER_BSS;
65
66 if (local->fif_pspoll)
67 new_flags |= FIF_PSPOLL;
68
69 spin_lock_bh(&local->filter_lock);
70 changed_flags = local->filter_flags ^ new_flags;
71
72 mc = drv_prepare_multicast(local, &local->mc_list);
73 spin_unlock_bh(&local->filter_lock);
74
75 /* be a bit nasty */
76 new_flags |= (1<<31);
77
78 drv_configure_filter(local, changed_flags, &new_flags, mc);
79
80 WARN_ON(new_flags & (1<<31));
81
82 local->filter_flags = new_flags & ~(1<<31);
83}
84
85static void ieee80211_reconfig_filter(struct work_struct *work)
86{
87 struct ieee80211_local *local =
88 container_of(work, struct ieee80211_local, reconfig_filter);
89
90 ieee80211_configure_filter(local);
91}
92
93static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
94{
95 struct ieee80211_sub_if_data *sdata;
96 struct cfg80211_chan_def chandef = {};
97 u32 changed = 0;
98 int power;
99 u32 offchannel_flag;
100
101 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
102
103 if (local->scan_chandef.chan) {
104 chandef = local->scan_chandef;
105 } else if (local->tmp_channel) {
106 chandef.chan = local->tmp_channel;
107 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
108 chandef.center_freq1 = chandef.chan->center_freq;
109 } else
110 chandef = local->_oper_chandef;
111
112 WARN(!cfg80211_chandef_valid(&chandef),
113 "control:%d MHz width:%d center: %d/%d MHz",
114 chandef.chan->center_freq, chandef.width,
115 chandef.center_freq1, chandef.center_freq2);
116
117 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
118 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
119 else
120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
121
122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
123
124 if (offchannel_flag ||
125 !cfg80211_chandef_identical(&local->hw.conf.chandef,
126 &local->_oper_chandef)) {
127 local->hw.conf.chandef = chandef;
128 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
129 }
130
131 if (!conf_is_ht(&local->hw.conf)) {
132 /*
133 * mac80211.h documents that this is only valid
134 * when the channel is set to an HT type, and
135 * that otherwise STATIC is used.
136 */
137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
138 } else if (local->hw.conf.smps_mode != local->smps_mode) {
139 local->hw.conf.smps_mode = local->smps_mode;
140 changed |= IEEE80211_CONF_CHANGE_SMPS;
141 }
142
143 power = ieee80211_chandef_max_power(&chandef);
144
145 rcu_read_lock();
146 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
147 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
148 continue;
149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
150 continue;
151 power = min(power, sdata->vif.bss_conf.txpower);
152 }
153 rcu_read_unlock();
154
155 if (local->hw.conf.power_level != power) {
156 changed |= IEEE80211_CONF_CHANGE_POWER;
157 local->hw.conf.power_level = power;
158 }
159
160 return changed;
161}
162
163int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
164{
165 int ret = 0;
166
167 might_sleep();
168
169 if (!local->use_chanctx)
170 changed |= ieee80211_hw_conf_chan(local);
171 else
172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173 IEEE80211_CONF_CHANGE_POWER);
174
175 if (changed && local->open_count) {
176 ret = drv_config(local, changed);
177 /*
178 * Goal:
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
181 *
182 * Current status:
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
185 * is enabled
186 *
187 * FIXME: integrate rfkill with mac80211 and then add this
188 * WARN_ON() back
189 *
190 */
191 /* WARN_ON(ret); */
192 }
193
194 return ret;
195}
196
197void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 u32 changed)
199{
200 struct ieee80211_local *local = sdata->local;
201
202 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203 return;
204
205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206}
207
208u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209{
210 sdata->vif.bss_conf.use_cts_prot = false;
211 sdata->vif.bss_conf.use_short_preamble = false;
212 sdata->vif.bss_conf.use_short_slot = false;
213 return BSS_CHANGED_ERP_CTS_PROT |
214 BSS_CHANGED_ERP_PREAMBLE |
215 BSS_CHANGED_ERP_SLOT;
216}
217
218static void ieee80211_tasklet_handler(unsigned long data)
219{
220 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 struct sk_buff *skb;
222
223 while ((skb = skb_dequeue(&local->skb_queue)) ||
224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225 switch (skb->pkt_type) {
226 case IEEE80211_RX_MSG:
227 /* Clear skb->pkt_type in order to not confuse kernel
228 * netstack. */
229 skb->pkt_type = 0;
230 ieee80211_rx(&local->hw, skb);
231 break;
232 case IEEE80211_TX_STATUS_MSG:
233 skb->pkt_type = 0;
234 ieee80211_tx_status(&local->hw, skb);
235 break;
236 default:
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
238 skb->pkt_type);
239 dev_kfree_skb(skb);
240 break;
241 }
242 }
243}
244
245static void ieee80211_restart_work(struct work_struct *work)
246{
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249
250 /* wait for scan work complete */
251 flush_workqueue(local->workqueue);
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 ieee80211_scan_cancel(local);
258 ieee80211_reconfig(local);
259 rtnl_unlock();
260}
261
262void ieee80211_restart_hw(struct ieee80211_hw *hw)
263{
264 struct ieee80211_local *local = hw_to_local(hw);
265
266 trace_api_restart_hw(local);
267
268 wiphy_info(hw->wiphy,
269 "Hardware restart was requested\n");
270
271 /* use this reason, ieee80211_reconfig will unblock it */
272 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
273 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
274 false);
275
276 /*
277 * Stop all Rx during the reconfig. We don't want state changes
278 * or driver callbacks while this is in progress.
279 */
280 local->in_reconfig = true;
281 barrier();
282
283 schedule_work(&local->restart_work);
284}
285EXPORT_SYMBOL(ieee80211_restart_hw);
286
287#ifdef CONFIG_INET
288static int ieee80211_ifa_changed(struct notifier_block *nb,
289 unsigned long data, void *arg)
290{
291 struct in_ifaddr *ifa = arg;
292 struct ieee80211_local *local =
293 container_of(nb, struct ieee80211_local,
294 ifa_notifier);
295 struct net_device *ndev = ifa->ifa_dev->dev;
296 struct wireless_dev *wdev = ndev->ieee80211_ptr;
297 struct in_device *idev;
298 struct ieee80211_sub_if_data *sdata;
299 struct ieee80211_bss_conf *bss_conf;
300 struct ieee80211_if_managed *ifmgd;
301 int c = 0;
302
303 /* Make sure it's our interface that got changed */
304 if (!wdev)
305 return NOTIFY_DONE;
306
307 if (wdev->wiphy != local->hw.wiphy)
308 return NOTIFY_DONE;
309
310 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
311 bss_conf = &sdata->vif.bss_conf;
312
313 /* ARP filtering is only supported in managed mode */
314 if (sdata->vif.type != NL80211_IFTYPE_STATION)
315 return NOTIFY_DONE;
316
317 idev = __in_dev_get_rtnl(sdata->dev);
318 if (!idev)
319 return NOTIFY_DONE;
320
321 ifmgd = &sdata->u.mgd;
322 sdata_lock(sdata);
323
324 /* Copy the addresses to the bss_conf list */
325 ifa = idev->ifa_list;
326 while (ifa) {
327 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
328 bss_conf->arp_addr_list[c] = ifa->ifa_address;
329 ifa = ifa->ifa_next;
330 c++;
331 }
332
333 bss_conf->arp_addr_cnt = c;
334
335 /* Configure driver only if associated (which also implies it is up) */
336 if (ifmgd->associated)
337 ieee80211_bss_info_change_notify(sdata,
338 BSS_CHANGED_ARP_FILTER);
339
340 sdata_unlock(sdata);
341
342 return NOTIFY_OK;
343}
344#endif
345
346#if IS_ENABLED(CONFIG_IPV6)
347static int ieee80211_ifa6_changed(struct notifier_block *nb,
348 unsigned long data, void *arg)
349{
350 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
351 struct inet6_dev *idev = ifa->idev;
352 struct net_device *ndev = ifa->idev->dev;
353 struct ieee80211_local *local =
354 container_of(nb, struct ieee80211_local, ifa6_notifier);
355 struct wireless_dev *wdev = ndev->ieee80211_ptr;
356 struct ieee80211_sub_if_data *sdata;
357
358 /* Make sure it's our interface that got changed */
359 if (!wdev || wdev->wiphy != local->hw.wiphy)
360 return NOTIFY_DONE;
361
362 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
363
364 /*
365 * For now only support station mode. This is mostly because
366 * doing AP would have to handle AP_VLAN in some way ...
367 */
368 if (sdata->vif.type != NL80211_IFTYPE_STATION)
369 return NOTIFY_DONE;
370
371 drv_ipv6_addr_change(local, sdata, idev);
372
373 return NOTIFY_OK;
374}
375#endif
376
377/* There isn't a lot of sense in it, but you can transmit anything you like */
378static const struct ieee80211_txrx_stypes
379ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
380 [NL80211_IFTYPE_ADHOC] = {
381 .tx = 0xffff,
382 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
383 BIT(IEEE80211_STYPE_AUTH >> 4) |
384 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
385 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
386 },
387 [NL80211_IFTYPE_STATION] = {
388 .tx = 0xffff,
389 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
390 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
391 },
392 [NL80211_IFTYPE_AP] = {
393 .tx = 0xffff,
394 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
395 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
397 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
398 BIT(IEEE80211_STYPE_AUTH >> 4) |
399 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
400 BIT(IEEE80211_STYPE_ACTION >> 4),
401 },
402 [NL80211_IFTYPE_AP_VLAN] = {
403 /* copy AP */
404 .tx = 0xffff,
405 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
406 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
408 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
409 BIT(IEEE80211_STYPE_AUTH >> 4) |
410 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
411 BIT(IEEE80211_STYPE_ACTION >> 4),
412 },
413 [NL80211_IFTYPE_P2P_CLIENT] = {
414 .tx = 0xffff,
415 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
416 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
417 },
418 [NL80211_IFTYPE_P2P_GO] = {
419 .tx = 0xffff,
420 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
421 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
423 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
424 BIT(IEEE80211_STYPE_AUTH >> 4) |
425 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
426 BIT(IEEE80211_STYPE_ACTION >> 4),
427 },
428 [NL80211_IFTYPE_MESH_POINT] = {
429 .tx = 0xffff,
430 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
431 BIT(IEEE80211_STYPE_AUTH >> 4) |
432 BIT(IEEE80211_STYPE_DEAUTH >> 4),
433 },
434 [NL80211_IFTYPE_P2P_DEVICE] = {
435 .tx = 0xffff,
436 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
438 },
439};
440
441static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
442 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
443 IEEE80211_HT_AMPDU_PARM_DENSITY,
444
445 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
446 IEEE80211_HT_CAP_MAX_AMSDU |
447 IEEE80211_HT_CAP_SGI_20 |
448 IEEE80211_HT_CAP_SGI_40 |
449 IEEE80211_HT_CAP_LDPC_CODING |
450 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
451 .mcs = {
452 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
453 0xff, 0xff, 0xff, 0xff, 0xff, },
454 },
455};
456
457static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
458 .vht_cap_info =
459 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
460 IEEE80211_VHT_CAP_SHORT_GI_80 |
461 IEEE80211_VHT_CAP_SHORT_GI_160 |
462 IEEE80211_VHT_CAP_RXSTBC_1 |
463 IEEE80211_VHT_CAP_RXSTBC_2 |
464 IEEE80211_VHT_CAP_RXSTBC_3 |
465 IEEE80211_VHT_CAP_RXSTBC_4 |
466 IEEE80211_VHT_CAP_TXSTBC |
467 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
468 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
469 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
470 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
471 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
472 .supp_mcs = {
473 .rx_mcs_map = cpu_to_le16(~0),
474 .tx_mcs_map = cpu_to_le16(~0),
475 },
476};
477
478struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
479 const struct ieee80211_ops *ops,
480 const char *requested_name)
481{
482 struct ieee80211_local *local;
483 int priv_size, i;
484 struct wiphy *wiphy;
485 bool use_chanctx;
486
487 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
488 !ops->add_interface || !ops->remove_interface ||
489 !ops->configure_filter))
490 return NULL;
491
492 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
493 return NULL;
494
495 /* check all or no channel context operations exist */
496 i = !!ops->add_chanctx + !!ops->remove_chanctx +
497 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
498 !!ops->unassign_vif_chanctx;
499 if (WARN_ON(i != 0 && i != 5))
500 return NULL;
501 use_chanctx = i == 5;
502
503 /* Ensure 32-byte alignment of our private data and hw private data.
504 * We use the wiphy priv data for both our ieee80211_local and for
505 * the driver's private data
506 *
507 * In memory it'll be like this:
508 *
509 * +-------------------------+
510 * | struct wiphy |
511 * +-------------------------+
512 * | struct ieee80211_local |
513 * +-------------------------+
514 * | driver's private data |
515 * +-------------------------+
516 *
517 */
518 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
519
520 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
521
522 if (!wiphy)
523 return NULL;
524
525 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
526
527 wiphy->privid = mac80211_wiphy_privid;
528
529 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
530 WIPHY_FLAG_4ADDR_AP |
531 WIPHY_FLAG_4ADDR_STATION |
532 WIPHY_FLAG_REPORTS_OBSS |
533 WIPHY_FLAG_OFFCHAN_TX;
534
535 if (ops->remain_on_channel)
536 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
537
538 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
539 NL80211_FEATURE_SAE |
540 NL80211_FEATURE_HT_IBSS |
541 NL80211_FEATURE_VIF_TXPOWER |
542 NL80211_FEATURE_MAC_ON_CREATE |
543 NL80211_FEATURE_USERSPACE_MPM;
544
545 if (!ops->hw_scan)
546 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
547 NL80211_FEATURE_AP_SCAN;
548
549
550 if (!ops->set_key)
551 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
552
553 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
554
555 local = wiphy_priv(wiphy);
556
557 if (sta_info_init(local))
558 goto err_free;
559
560 local->hw.wiphy = wiphy;
561
562 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
563
564 local->ops = ops;
565 local->use_chanctx = use_chanctx;
566
567 /* set up some defaults */
568 local->hw.queues = 1;
569 local->hw.max_rates = 1;
570 local->hw.max_report_rates = 0;
571 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
572 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
573 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
574 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
575 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
576 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
577 IEEE80211_RADIOTAP_MCS_HAVE_GI |
578 IEEE80211_RADIOTAP_MCS_HAVE_BW;
579 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
580 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
581 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
582 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
583 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
584 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
585 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
586
587 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
588
589 wiphy->extended_capabilities = local->ext_capa;
590 wiphy->extended_capabilities_mask = local->ext_capa;
591 wiphy->extended_capabilities_len =
592 ARRAY_SIZE(local->ext_capa);
593
594 INIT_LIST_HEAD(&local->interfaces);
595
596 __hw_addr_init(&local->mc_list);
597
598 mutex_init(&local->iflist_mtx);
599 mutex_init(&local->mtx);
600
601 mutex_init(&local->key_mtx);
602 spin_lock_init(&local->filter_lock);
603 spin_lock_init(&local->rx_path_lock);
604 spin_lock_init(&local->queue_stop_reason_lock);
605
606 INIT_LIST_HEAD(&local->chanctx_list);
607 mutex_init(&local->chanctx_mtx);
608
609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
610
611 INIT_WORK(&local->restart_work, ieee80211_restart_work);
612
613 INIT_WORK(&local->radar_detected_work,
614 ieee80211_dfs_radar_detected_work);
615
616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617 local->smps_mode = IEEE80211_SMPS_OFF;
618
619 INIT_WORK(&local->dynamic_ps_enable_work,
620 ieee80211_dynamic_ps_enable_work);
621 INIT_WORK(&local->dynamic_ps_disable_work,
622 ieee80211_dynamic_ps_disable_work);
623 setup_timer(&local->dynamic_ps_timer,
624 ieee80211_dynamic_ps_timer, (unsigned long) local);
625
626 INIT_WORK(&local->sched_scan_stopped_work,
627 ieee80211_sched_scan_stopped_work);
628
629 spin_lock_init(&local->ack_status_lock);
630 idr_init(&local->ack_status_frames);
631
632 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
633 skb_queue_head_init(&local->pending[i]);
634 atomic_set(&local->agg_queue_stop[i], 0);
635 }
636 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
637 (unsigned long)local);
638
639 tasklet_init(&local->tasklet,
640 ieee80211_tasklet_handler,
641 (unsigned long) local);
642
643 skb_queue_head_init(&local->skb_queue);
644 skb_queue_head_init(&local->skb_queue_unreliable);
645
646 ieee80211_led_names(local);
647
648 ieee80211_roc_setup(local);
649
650 return &local->hw;
651 err_free:
652 wiphy_free(wiphy);
653 return NULL;
654}
655EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
656
657static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
658{
659 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
660 IS_ERR(local->wep_rx_tfm));
661 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
662 int n_suites = 0, r = 0, w = 0;
663 u32 *suites;
664 static const u32 cipher_suites[] = {
665 /* keep WEP first, it may be removed below */
666 WLAN_CIPHER_SUITE_WEP40,
667 WLAN_CIPHER_SUITE_WEP104,
668 WLAN_CIPHER_SUITE_TKIP,
669 WLAN_CIPHER_SUITE_CCMP,
670 WLAN_CIPHER_SUITE_CCMP_256,
671 WLAN_CIPHER_SUITE_GCMP,
672 WLAN_CIPHER_SUITE_GCMP_256,
673
674 /* keep last -- depends on hw flags! */
675 WLAN_CIPHER_SUITE_AES_CMAC,
676 WLAN_CIPHER_SUITE_BIP_CMAC_256,
677 WLAN_CIPHER_SUITE_BIP_GMAC_128,
678 WLAN_CIPHER_SUITE_BIP_GMAC_256,
679 };
680
681 if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
682 local->hw.wiphy->cipher_suites) {
683 /* If the driver advertises, or doesn't support SW crypto,
684 * we only need to remove WEP if necessary.
685 */
686 if (have_wep)
687 return 0;
688
689 /* well if it has _no_ ciphers ... fine */
690 if (!local->hw.wiphy->n_cipher_suites)
691 return 0;
692
693 /* Driver provides cipher suites, but we need to exclude WEP */
694 suites = kmemdup(local->hw.wiphy->cipher_suites,
695 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
696 GFP_KERNEL);
697 if (!suites)
698 return -ENOMEM;
699
700 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
701 u32 suite = local->hw.wiphy->cipher_suites[r];
702
703 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
704 suite == WLAN_CIPHER_SUITE_WEP104)
705 continue;
706 suites[w++] = suite;
707 }
708 } else if (!local->hw.cipher_schemes) {
709 /* If the driver doesn't have cipher schemes, there's nothing
710 * else to do other than assign the (software supported and
711 * perhaps offloaded) cipher suites.
712 */
713 local->hw.wiphy->cipher_suites = cipher_suites;
714 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
715
716 if (!have_mfp)
717 local->hw.wiphy->n_cipher_suites -= 4;
718
719 if (!have_wep) {
720 local->hw.wiphy->cipher_suites += 2;
721 local->hw.wiphy->n_cipher_suites -= 2;
722 }
723
724 /* not dynamically allocated, so just return */
725 return 0;
726 } else {
727 const struct ieee80211_cipher_scheme *cs;
728
729 cs = local->hw.cipher_schemes;
730
731 /* Driver specifies cipher schemes only (but not cipher suites
732 * including the schemes)
733 *
734 * We start counting ciphers defined by schemes, TKIP, CCMP,
735 * CCMP-256, GCMP, and GCMP-256
736 */
737 n_suites = local->hw.n_cipher_schemes + 5;
738
739 /* check if we have WEP40 and WEP104 */
740 if (have_wep)
741 n_suites += 2;
742
743 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
744 * BIP-GMAC-256
745 */
746 if (have_mfp)
747 n_suites += 4;
748
749 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
750 if (!suites)
751 return -ENOMEM;
752
753 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
754 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
755 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
756 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
757 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
758
759 if (have_wep) {
760 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
761 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
762 }
763
764 if (have_mfp) {
765 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
766 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
767 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
768 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
769 }
770
771 for (r = 0; r < local->hw.n_cipher_schemes; r++)
772 suites[w++] = cs[r].cipher;
773 }
774
775 local->hw.wiphy->cipher_suites = suites;
776 local->hw.wiphy->n_cipher_suites = w;
777 local->wiphy_ciphers_allocated = true;
778
779 return 0;
780}
781
782int ieee80211_register_hw(struct ieee80211_hw *hw)
783{
784 struct ieee80211_local *local = hw_to_local(hw);
785 int result, i;
786 enum ieee80211_band band;
787 int channels, max_bitrates;
788 bool supp_ht, supp_vht;
789 netdev_features_t feature_whitelist;
790 struct cfg80211_chan_def dflt_chandef = {};
791
792 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
793 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
794 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
795 return -EINVAL;
796
797 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
798 (!local->ops->tdls_channel_switch ||
799 !local->ops->tdls_cancel_channel_switch ||
800 !local->ops->tdls_recv_channel_switch))
801 return -EOPNOTSUPP;
802
803#ifdef CONFIG_PM
804 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
805 return -EINVAL;
806#endif
807
808 if (!local->use_chanctx) {
809 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
810 const struct ieee80211_iface_combination *comb;
811
812 comb = &local->hw.wiphy->iface_combinations[i];
813
814 if (comb->num_different_channels > 1)
815 return -EINVAL;
816 }
817 } else {
818 /*
819 * WDS is currently prohibited when channel contexts are used
820 * because there's no clear definition of which channel WDS
821 * type interfaces use
822 */
823 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
824 return -EINVAL;
825
826 /* DFS is not supported with multi-channel combinations yet */
827 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
828 const struct ieee80211_iface_combination *comb;
829
830 comb = &local->hw.wiphy->iface_combinations[i];
831
832 if (comb->radar_detect_widths &&
833 comb->num_different_channels > 1)
834 return -EINVAL;
835 }
836 }
837
838 /* Only HW csum features are currently compatible with mac80211 */
839 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
840 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
841 NETIF_F_GSO_SOFTWARE;
842 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
843 return -EINVAL;
844
845 if (hw->max_report_rates == 0)
846 hw->max_report_rates = hw->max_rates;
847
848 local->rx_chains = 1;
849
850 /*
851 * generic code guarantees at least one band,
852 * set this very early because much code assumes
853 * that hw.conf.channel is assigned
854 */
855 channels = 0;
856 max_bitrates = 0;
857 supp_ht = false;
858 supp_vht = false;
859 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
860 struct ieee80211_supported_band *sband;
861
862 sband = local->hw.wiphy->bands[band];
863 if (!sband)
864 continue;
865
866 if (!dflt_chandef.chan) {
867 cfg80211_chandef_create(&dflt_chandef,
868 &sband->channels[0],
869 NL80211_CHAN_NO_HT);
870 /* init channel we're on */
871 if (!local->use_chanctx && !local->_oper_chandef.chan) {
872 local->hw.conf.chandef = dflt_chandef;
873 local->_oper_chandef = dflt_chandef;
874 }
875 local->monitor_chandef = dflt_chandef;
876 }
877
878 channels += sband->n_channels;
879
880 if (max_bitrates < sband->n_bitrates)
881 max_bitrates = sband->n_bitrates;
882 supp_ht = supp_ht || sband->ht_cap.ht_supported;
883 supp_vht = supp_vht || sband->vht_cap.vht_supported;
884
885 if (sband->ht_cap.ht_supported)
886 local->rx_chains =
887 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
888 local->rx_chains);
889
890 /* TODO: consider VHT for RX chains, hopefully it's the same */
891 }
892
893 /* if low-level driver supports AP, we also support VLAN */
894 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
895 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
896 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
897 }
898
899 /* mac80211 always supports monitor */
900 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
901 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
902
903 /* mac80211 doesn't support more than one IBSS interface right now */
904 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
905 const struct ieee80211_iface_combination *c;
906 int j;
907
908 c = &hw->wiphy->iface_combinations[i];
909
910 for (j = 0; j < c->n_limits; j++)
911 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
912 c->limits[j].max > 1)
913 return -EINVAL;
914 }
915
916 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
917 sizeof(void *) * channels, GFP_KERNEL);
918 if (!local->int_scan_req)
919 return -ENOMEM;
920
921 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
922 if (!local->hw.wiphy->bands[band])
923 continue;
924 local->int_scan_req->rates[band] = (u32) -1;
925 }
926
927#ifndef CONFIG_MAC80211_MESH
928 /* mesh depends on Kconfig, but drivers should set it if they want */
929 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
930#endif
931
932 /* if the underlying driver supports mesh, mac80211 will (at least)
933 * provide routing of mesh authentication frames to userspace */
934 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
935 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
936
937 /* mac80211 supports control port protocol changing */
938 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
939
940 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
941 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
942 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
943 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
944 if (hw->max_signal <= 0) {
945 result = -EINVAL;
946 goto fail_wiphy_register;
947 }
948 }
949
950 /*
951 * Calculate scan IE length -- we need this to alloc
952 * memory and to subtract from the driver limit. It
953 * includes the DS Params, (extended) supported rates, and HT
954 * information -- SSID is the driver's responsibility.
955 */
956 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
957 3 /* DS Params */;
958 if (supp_ht)
959 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
960
961 if (supp_vht)
962 local->scan_ies_len +=
963 2 + sizeof(struct ieee80211_vht_cap);
964
965 if (!local->ops->hw_scan) {
966 /* For hw_scan, driver needs to set these up. */
967 local->hw.wiphy->max_scan_ssids = 4;
968 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
969 }
970
971 /*
972 * If the driver supports any scan IEs, then assume the
973 * limit includes the IEs mac80211 will add, otherwise
974 * leave it at zero and let the driver sort it out; we
975 * still pass our IEs to the driver but userspace will
976 * not be allowed to in that case.
977 */
978 if (local->hw.wiphy->max_scan_ie_len)
979 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
980
981 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
982 local->hw.n_cipher_schemes));
983
984 result = ieee80211_init_cipher_suites(local);
985 if (result < 0)
986 goto fail_wiphy_register;
987
988 if (!local->ops->remain_on_channel)
989 local->hw.wiphy->max_remain_on_channel_duration = 5000;
990
991 /* mac80211 based drivers don't support internal TDLS setup */
992 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
993 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
994
995 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
996 if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
997 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
998
999 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1000
1001 result = wiphy_register(local->hw.wiphy);
1002 if (result < 0)
1003 goto fail_wiphy_register;
1004
1005 /*
1006 * We use the number of queues for feature tests (QoS, HT) internally
1007 * so restrict them appropriately.
1008 */
1009 if (hw->queues > IEEE80211_MAX_QUEUES)
1010 hw->queues = IEEE80211_MAX_QUEUES;
1011
1012 local->workqueue =
1013 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1014 if (!local->workqueue) {
1015 result = -ENOMEM;
1016 goto fail_workqueue;
1017 }
1018
1019 /*
1020 * The hardware needs headroom for sending the frame,
1021 * and we need some headroom for passing the frame to monitor
1022 * interfaces, but never both at the same time.
1023 */
1024 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1025 IEEE80211_TX_STATUS_HEADROOM);
1026
1027 debugfs_hw_add(local);
1028
1029 /*
1030 * if the driver doesn't specify a max listen interval we
1031 * use 5 which should be a safe default
1032 */
1033 if (local->hw.max_listen_interval == 0)
1034 local->hw.max_listen_interval = 5;
1035
1036 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1037
1038 local->dynamic_ps_forced_timeout = -1;
1039
1040 if (!local->hw.txq_ac_max_pending)
1041 local->hw.txq_ac_max_pending = 64;
1042
1043 result = ieee80211_wep_init(local);
1044 if (result < 0)
1045 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1046 result);
1047
1048 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1049
1050 ieee80211_led_init(local);
1051
1052 rtnl_lock();
1053
1054 result = ieee80211_init_rate_ctrl_alg(local,
1055 hw->rate_control_algorithm);
1056 if (result < 0) {
1057 wiphy_debug(local->hw.wiphy,
1058 "Failed to initialize rate control algorithm\n");
1059 goto fail_rate;
1060 }
1061
1062 /* add one default STA interface if supported */
1063 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1064 !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1065 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1066 NL80211_IFTYPE_STATION, NULL);
1067 if (result)
1068 wiphy_warn(local->hw.wiphy,
1069 "Failed to add default virtual iface\n");
1070 }
1071
1072 rtnl_unlock();
1073
1074 local->network_latency_notifier.notifier_call =
1075 ieee80211_max_network_latency;
1076 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1077 &local->network_latency_notifier);
1078 if (result)
1079 goto fail_pm_qos;
1080
1081#ifdef CONFIG_INET
1082 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1083 result = register_inetaddr_notifier(&local->ifa_notifier);
1084 if (result)
1085 goto fail_ifa;
1086#endif
1087
1088#if IS_ENABLED(CONFIG_IPV6)
1089 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1090 result = register_inet6addr_notifier(&local->ifa6_notifier);
1091 if (result)
1092 goto fail_ifa6;
1093#endif
1094
1095 return 0;
1096
1097#if IS_ENABLED(CONFIG_IPV6)
1098 fail_ifa6:
1099#ifdef CONFIG_INET
1100 unregister_inetaddr_notifier(&local->ifa_notifier);
1101#endif
1102#endif
1103#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1104 fail_ifa:
1105 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1106 &local->network_latency_notifier);
1107#endif
1108 fail_pm_qos:
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}
1125EXPORT_SYMBOL(ieee80211_register_hw);
1126
1127void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1128 struct net_device *napi_dev,
1129 int (*poll)(struct napi_struct *, int),
1130 int weight)
1131{
1132 struct ieee80211_local *local = hw_to_local(hw);
1133
1134 netif_napi_add(napi_dev, napi, poll, weight);
1135 local->napi = napi;
1136}
1137EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1138
1139void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1140{
1141 struct ieee80211_local *local = hw_to_local(hw);
1142
1143 tasklet_kill(&local->tx_pending_tasklet);
1144 tasklet_kill(&local->tasklet);
1145
1146 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1147 &local->network_latency_notifier);
1148#ifdef CONFIG_INET
1149 unregister_inetaddr_notifier(&local->ifa_notifier);
1150#endif
1151#if IS_ENABLED(CONFIG_IPV6)
1152 unregister_inet6addr_notifier(&local->ifa6_notifier);
1153#endif
1154
1155 rtnl_lock();
1156
1157 /*
1158 * At this point, interface list manipulations are fine
1159 * because the driver cannot be handing us frames any
1160 * more and the tasklet is killed.
1161 */
1162 ieee80211_remove_interfaces(local);
1163
1164 rtnl_unlock();
1165
1166 cancel_work_sync(&local->restart_work);
1167 cancel_work_sync(&local->reconfig_filter);
1168 flush_work(&local->sched_scan_stopped_work);
1169
1170 ieee80211_clear_tx_pending(local);
1171 rate_control_deinitialize(local);
1172
1173 if (skb_queue_len(&local->skb_queue) ||
1174 skb_queue_len(&local->skb_queue_unreliable))
1175 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1176 skb_queue_purge(&local->skb_queue);
1177 skb_queue_purge(&local->skb_queue_unreliable);
1178
1179 destroy_workqueue(local->workqueue);
1180 wiphy_unregister(local->hw.wiphy);
1181 ieee80211_wep_free(local);
1182 ieee80211_led_exit(local);
1183 kfree(local->int_scan_req);
1184}
1185EXPORT_SYMBOL(ieee80211_unregister_hw);
1186
1187static int ieee80211_free_ack_frame(int id, void *p, void *data)
1188{
1189 WARN_ONCE(1, "Have pending ack frames!\n");
1190 kfree_skb(p);
1191 return 0;
1192}
1193
1194void ieee80211_free_hw(struct ieee80211_hw *hw)
1195{
1196 struct ieee80211_local *local = hw_to_local(hw);
1197
1198 mutex_destroy(&local->iflist_mtx);
1199 mutex_destroy(&local->mtx);
1200
1201 if (local->wiphy_ciphers_allocated)
1202 kfree(local->hw.wiphy->cipher_suites);
1203
1204 idr_for_each(&local->ack_status_frames,
1205 ieee80211_free_ack_frame, NULL);
1206 idr_destroy(&local->ack_status_frames);
1207
1208 sta_info_stop(local);
1209
1210 wiphy_free(local->hw.wiphy);
1211}
1212EXPORT_SYMBOL(ieee80211_free_hw);
1213
1214static int __init ieee80211_init(void)
1215{
1216 struct sk_buff *skb;
1217 int ret;
1218
1219 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1220 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1221 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1222
1223 ret = rc80211_minstrel_init();
1224 if (ret)
1225 return ret;
1226
1227 ret = rc80211_minstrel_ht_init();
1228 if (ret)
1229 goto err_minstrel;
1230
1231 ret = ieee80211_iface_init();
1232 if (ret)
1233 goto err_netdev;
1234
1235 return 0;
1236 err_netdev:
1237 rc80211_minstrel_ht_exit();
1238 err_minstrel:
1239 rc80211_minstrel_exit();
1240
1241 return ret;
1242}
1243
1244static void __exit ieee80211_exit(void)
1245{
1246 rc80211_minstrel_ht_exit();
1247 rc80211_minstrel_exit();
1248
1249 ieee80211s_stop();
1250
1251 ieee80211_iface_exit();
1252
1253 rcu_barrier();
1254}
1255
1256
1257subsys_initcall(ieee80211_init);
1258module_exit(ieee80211_exit);
1259
1260MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1261MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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