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ARM: imx_v6_v7_defconfig: Select CAAM
[linux-2.6/btrfs-unstable.git] / net / mac80211 / main.c
blob3c63468b4dfb530d0e28a5f97dddf5065543ba6f
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/pm_qos.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "cfg.h"
36 #include "debugfs.h"
37
38 void ieee80211_configure_filter(struct ieee80211_local *local)
39 {
40 u64 mc;
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
43
44 if (atomic_read(&local->iff_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
85 static 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
93 static 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
163 int 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
197 void 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
208 u32 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
218 static 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
245 static void ieee80211_restart_work(struct work_struct *work)
246 {
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249 struct ieee80211_sub_if_data *sdata;
250
251 /* wait for scan work complete */
252 flush_workqueue(local->workqueue);
253
254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
255 "%s called with hardware scan in progress\n", __func__);
256
257 rtnl_lock();
258 list_for_each_entry(sdata, &local->interfaces, list)
259 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
260 ieee80211_scan_cancel(local);
261 ieee80211_reconfig(local);
262 rtnl_unlock();
263 }
264
265 void ieee80211_restart_hw(struct ieee80211_hw *hw)
266 {
267 struct ieee80211_local *local = hw_to_local(hw);
268
269 trace_api_restart_hw(local);
270
271 wiphy_info(hw->wiphy,
272 "Hardware restart was requested\n");
273
274 /* use this reason, ieee80211_reconfig will unblock it */
275 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
276 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
277 false);
278
279 /*
280 * Stop all Rx during the reconfig. We don't want state changes
281 * or driver callbacks while this is in progress.
282 */
283 local->in_reconfig = true;
284 barrier();
285
286 schedule_work(&local->restart_work);
287 }
288 EXPORT_SYMBOL(ieee80211_restart_hw);
289
290 #ifdef CONFIG_INET
291 static int ieee80211_ifa_changed(struct notifier_block *nb,
292 unsigned long data, void *arg)
293 {
294 struct in_ifaddr *ifa = arg;
295 struct ieee80211_local *local =
296 container_of(nb, struct ieee80211_local,
297 ifa_notifier);
298 struct net_device *ndev = ifa->ifa_dev->dev;
299 struct wireless_dev *wdev = ndev->ieee80211_ptr;
300 struct in_device *idev;
301 struct ieee80211_sub_if_data *sdata;
302 struct ieee80211_bss_conf *bss_conf;
303 struct ieee80211_if_managed *ifmgd;
304 int c = 0;
305
306 /* Make sure it's our interface that got changed */
307 if (!wdev)
308 return NOTIFY_DONE;
309
310 if (wdev->wiphy != local->hw.wiphy)
311 return NOTIFY_DONE;
312
313 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
314 bss_conf = &sdata->vif.bss_conf;
315
316 /* ARP filtering is only supported in managed mode */
317 if (sdata->vif.type != NL80211_IFTYPE_STATION)
318 return NOTIFY_DONE;
319
320 idev = __in_dev_get_rtnl(sdata->dev);
321 if (!idev)
322 return NOTIFY_DONE;
323
324 ifmgd = &sdata->u.mgd;
325 sdata_lock(sdata);
326
327 /* Copy the addresses to the bss_conf list */
328 ifa = idev->ifa_list;
329 while (ifa) {
330 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
331 bss_conf->arp_addr_list[c] = ifa->ifa_address;
332 ifa = ifa->ifa_next;
333 c++;
334 }
335
336 bss_conf->arp_addr_cnt = c;
337
338 /* Configure driver only if associated (which also implies it is up) */
339 if (ifmgd->associated)
340 ieee80211_bss_info_change_notify(sdata,
341 BSS_CHANGED_ARP_FILTER);
342
343 sdata_unlock(sdata);
344
345 return NOTIFY_OK;
346 }
347 #endif
348
349 #if IS_ENABLED(CONFIG_IPV6)
350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
351 unsigned long data, void *arg)
352 {
353 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
354 struct inet6_dev *idev = ifa->idev;
355 struct net_device *ndev = ifa->idev->dev;
356 struct ieee80211_local *local =
357 container_of(nb, struct ieee80211_local, ifa6_notifier);
358 struct wireless_dev *wdev = ndev->ieee80211_ptr;
359 struct ieee80211_sub_if_data *sdata;
360
361 /* Make sure it's our interface that got changed */
362 if (!wdev || wdev->wiphy != local->hw.wiphy)
363 return NOTIFY_DONE;
364
365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366
367 /*
368 * For now only support station mode. This is mostly because
369 * doing AP would have to handle AP_VLAN in some way ...
370 */
371 if (sdata->vif.type != NL80211_IFTYPE_STATION)
372 return NOTIFY_DONE;
373
374 drv_ipv6_addr_change(local, sdata, idev);
375
376 return NOTIFY_OK;
377 }
378 #endif
379
380 /* There isn't a lot of sense in it, but you can transmit anything you like */
381 static const struct ieee80211_txrx_stypes
382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
383 [NL80211_IFTYPE_ADHOC] = {
384 .tx = 0xffff,
385 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
386 BIT(IEEE80211_STYPE_AUTH >> 4) |
387 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
388 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
389 },
390 [NL80211_IFTYPE_STATION] = {
391 .tx = 0xffff,
392 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394 },
395 [NL80211_IFTYPE_AP] = {
396 .tx = 0xffff,
397 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
398 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
399 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
400 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
401 BIT(IEEE80211_STYPE_AUTH >> 4) |
402 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
403 BIT(IEEE80211_STYPE_ACTION >> 4),
404 },
405 [NL80211_IFTYPE_AP_VLAN] = {
406 /* copy AP */
407 .tx = 0xffff,
408 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
409 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
411 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
412 BIT(IEEE80211_STYPE_AUTH >> 4) |
413 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414 BIT(IEEE80211_STYPE_ACTION >> 4),
415 },
416 [NL80211_IFTYPE_P2P_CLIENT] = {
417 .tx = 0xffff,
418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
420 },
421 [NL80211_IFTYPE_P2P_GO] = {
422 .tx = 0xffff,
423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
427 BIT(IEEE80211_STYPE_AUTH >> 4) |
428 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
429 BIT(IEEE80211_STYPE_ACTION >> 4),
430 },
431 [NL80211_IFTYPE_MESH_POINT] = {
432 .tx = 0xffff,
433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH >> 4),
436 },
437 [NL80211_IFTYPE_P2P_DEVICE] = {
438 .tx = 0xffff,
439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
441 },
442 };
443
444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
445 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
446 IEEE80211_HT_AMPDU_PARM_DENSITY,
447
448 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
449 IEEE80211_HT_CAP_MAX_AMSDU |
450 IEEE80211_HT_CAP_SGI_20 |
451 IEEE80211_HT_CAP_SGI_40 |
452 IEEE80211_HT_CAP_LDPC_CODING |
453 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
454 .mcs = {
455 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
456 0xff, 0xff, 0xff, 0xff, 0xff, },
457 },
458 };
459
460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
461 .vht_cap_info =
462 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
463 IEEE80211_VHT_CAP_SHORT_GI_80 |
464 IEEE80211_VHT_CAP_SHORT_GI_160 |
465 IEEE80211_VHT_CAP_RXSTBC_1 |
466 IEEE80211_VHT_CAP_RXSTBC_2 |
467 IEEE80211_VHT_CAP_RXSTBC_3 |
468 IEEE80211_VHT_CAP_RXSTBC_4 |
469 IEEE80211_VHT_CAP_TXSTBC |
470 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
471 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
472 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
473 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
474 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
475 .supp_mcs = {
476 .rx_mcs_map = cpu_to_le16(~0),
477 .tx_mcs_map = cpu_to_le16(~0),
478 },
479 };
480
481 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
482 const struct ieee80211_ops *ops,
483 const char *requested_name)
484 {
485 struct ieee80211_local *local;
486 int priv_size, i;
487 struct wiphy *wiphy;
488 bool use_chanctx;
489
490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
491 !ops->add_interface || !ops->remove_interface ||
492 !ops->configure_filter))
493 return NULL;
494
495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
496 return NULL;
497
498 /* check all or no channel context operations exist */
499 i = !!ops->add_chanctx + !!ops->remove_chanctx +
500 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
501 !!ops->unassign_vif_chanctx;
502 if (WARN_ON(i != 0 && i != 5))
503 return NULL;
504 use_chanctx = i == 5;
505
506 /* Ensure 32-byte alignment of our private data and hw private data.
507 * We use the wiphy priv data for both our ieee80211_local and for
508 * the driver's private data
509 *
510 * In memory it'll be like this:
511 *
512 * +-------------------------+
513 * | struct wiphy |
514 * +-------------------------+
515 * | struct ieee80211_local |
516 * +-------------------------+
517 * | driver's private data |
518 * +-------------------------+
519 *
520 */
521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
522
523 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
524
525 if (!wiphy)
526 return NULL;
527
528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
529
530 wiphy->privid = mac80211_wiphy_privid;
531
532 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
533 WIPHY_FLAG_4ADDR_AP |
534 WIPHY_FLAG_4ADDR_STATION |
535 WIPHY_FLAG_REPORTS_OBSS |
536 WIPHY_FLAG_OFFCHAN_TX;
537
538 if (ops->remain_on_channel)
539 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
540
541 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
542 NL80211_FEATURE_SAE |
543 NL80211_FEATURE_HT_IBSS |
544 NL80211_FEATURE_VIF_TXPOWER |
545 NL80211_FEATURE_MAC_ON_CREATE |
546 NL80211_FEATURE_USERSPACE_MPM;
547
548 if (!ops->hw_scan)
549 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
550 NL80211_FEATURE_AP_SCAN;
551
552
553 if (!ops->set_key)
554 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
555
556 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
557
558 local = wiphy_priv(wiphy);
559
560 if (sta_info_init(local))
561 goto err_free;
562
563 local->hw.wiphy = wiphy;
564
565 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
566
567 local->ops = ops;
568 local->use_chanctx = use_chanctx;
569
570 /* set up some defaults */
571 local->hw.queues = 1;
572 local->hw.max_rates = 1;
573 local->hw.max_report_rates = 0;
574 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
575 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
576 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
577 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
578 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
579 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
580 IEEE80211_RADIOTAP_MCS_HAVE_GI |
581 IEEE80211_RADIOTAP_MCS_HAVE_BW;
582 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
583 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
584 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
585 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
586 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
587 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
588 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
589
590 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
591
592 wiphy->extended_capabilities = local->ext_capa;
593 wiphy->extended_capabilities_mask = local->ext_capa;
594 wiphy->extended_capabilities_len =
595 ARRAY_SIZE(local->ext_capa);
596
597 INIT_LIST_HEAD(&local->interfaces);
598
599 __hw_addr_init(&local->mc_list);
600
601 mutex_init(&local->iflist_mtx);
602 mutex_init(&local->mtx);
603
604 mutex_init(&local->key_mtx);
605 spin_lock_init(&local->filter_lock);
606 spin_lock_init(&local->rx_path_lock);
607 spin_lock_init(&local->queue_stop_reason_lock);
608
609 INIT_LIST_HEAD(&local->chanctx_list);
610 mutex_init(&local->chanctx_mtx);
611
612 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
613
614 INIT_WORK(&local->restart_work, ieee80211_restart_work);
615
616 INIT_WORK(&local->radar_detected_work,
617 ieee80211_dfs_radar_detected_work);
618
619 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
620 local->smps_mode = IEEE80211_SMPS_OFF;
621
622 INIT_WORK(&local->dynamic_ps_enable_work,
623 ieee80211_dynamic_ps_enable_work);
624 INIT_WORK(&local->dynamic_ps_disable_work,
625 ieee80211_dynamic_ps_disable_work);
626 setup_timer(&local->dynamic_ps_timer,
627 ieee80211_dynamic_ps_timer, (unsigned long) local);
628
629 INIT_WORK(&local->sched_scan_stopped_work,
630 ieee80211_sched_scan_stopped_work);
631
632 spin_lock_init(&local->ack_status_lock);
633 idr_init(&local->ack_status_frames);
634
635 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
636 skb_queue_head_init(&local->pending[i]);
637 atomic_set(&local->agg_queue_stop[i], 0);
638 }
639 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
640 (unsigned long)local);
641
642 tasklet_init(&local->tasklet,
643 ieee80211_tasklet_handler,
644 (unsigned long) local);
645
646 skb_queue_head_init(&local->skb_queue);
647 skb_queue_head_init(&local->skb_queue_unreliable);
648
649 ieee80211_alloc_led_names(local);
650
651 ieee80211_roc_setup(local);
652
653 return &local->hw;
654 err_free:
655 wiphy_free(wiphy);
656 return NULL;
657 }
658 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
659
660 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
661 {
662 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
663 IS_ERR(local->wep_rx_tfm));
664 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
665 int n_suites = 0, r = 0, w = 0;
666 u32 *suites;
667 static const u32 cipher_suites[] = {
668 /* keep WEP first, it may be removed below */
669 WLAN_CIPHER_SUITE_WEP40,
670 WLAN_CIPHER_SUITE_WEP104,
671 WLAN_CIPHER_SUITE_TKIP,
672 WLAN_CIPHER_SUITE_CCMP,
673 WLAN_CIPHER_SUITE_CCMP_256,
674 WLAN_CIPHER_SUITE_GCMP,
675 WLAN_CIPHER_SUITE_GCMP_256,
676
677 /* keep last -- depends on hw flags! */
678 WLAN_CIPHER_SUITE_AES_CMAC,
679 WLAN_CIPHER_SUITE_BIP_CMAC_256,
680 WLAN_CIPHER_SUITE_BIP_GMAC_128,
681 WLAN_CIPHER_SUITE_BIP_GMAC_256,
682 };
683
684 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
685 local->hw.wiphy->cipher_suites) {
686 /* If the driver advertises, or doesn't support SW crypto,
687 * we only need to remove WEP if necessary.
688 */
689 if (have_wep)
690 return 0;
691
692 /* well if it has _no_ ciphers ... fine */
693 if (!local->hw.wiphy->n_cipher_suites)
694 return 0;
695
696 /* Driver provides cipher suites, but we need to exclude WEP */
697 suites = kmemdup(local->hw.wiphy->cipher_suites,
698 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
699 GFP_KERNEL);
700 if (!suites)
701 return -ENOMEM;
702
703 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
704 u32 suite = local->hw.wiphy->cipher_suites[r];
705
706 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
707 suite == WLAN_CIPHER_SUITE_WEP104)
708 continue;
709 suites[w++] = suite;
710 }
711 } else if (!local->hw.cipher_schemes) {
712 /* If the driver doesn't have cipher schemes, there's nothing
713 * else to do other than assign the (software supported and
714 * perhaps offloaded) cipher suites.
715 */
716 local->hw.wiphy->cipher_suites = cipher_suites;
717 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
718
719 if (!have_mfp)
720 local->hw.wiphy->n_cipher_suites -= 4;
721
722 if (!have_wep) {
723 local->hw.wiphy->cipher_suites += 2;
724 local->hw.wiphy->n_cipher_suites -= 2;
725 }
726
727 /* not dynamically allocated, so just return */
728 return 0;
729 } else {
730 const struct ieee80211_cipher_scheme *cs;
731
732 cs = local->hw.cipher_schemes;
733
734 /* Driver specifies cipher schemes only (but not cipher suites
735 * including the schemes)
736 *
737 * We start counting ciphers defined by schemes, TKIP, CCMP,
738 * CCMP-256, GCMP, and GCMP-256
739 */
740 n_suites = local->hw.n_cipher_schemes + 5;
741
742 /* check if we have WEP40 and WEP104 */
743 if (have_wep)
744 n_suites += 2;
745
746 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
747 * BIP-GMAC-256
748 */
749 if (have_mfp)
750 n_suites += 4;
751
752 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
753 if (!suites)
754 return -ENOMEM;
755
756 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
757 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
758 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
759 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
760 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
761
762 if (have_wep) {
763 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
764 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
765 }
766
767 if (have_mfp) {
768 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
769 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
770 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
771 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
772 }
773
774 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
775 suites[w++] = cs[r].cipher;
776 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
777 kfree(suites);
778 return -EINVAL;
779 }
780 }
781 }
782
783 local->hw.wiphy->cipher_suites = suites;
784 local->hw.wiphy->n_cipher_suites = w;
785 local->wiphy_ciphers_allocated = true;
786
787 return 0;
788 }
789
790 int ieee80211_register_hw(struct ieee80211_hw *hw)
791 {
792 struct ieee80211_local *local = hw_to_local(hw);
793 int result, i;
794 enum ieee80211_band band;
795 int channels, max_bitrates;
796 bool supp_ht, supp_vht;
797 netdev_features_t feature_whitelist;
798 struct cfg80211_chan_def dflt_chandef = {};
799
800 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
801 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
802 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
803 return -EINVAL;
804
805 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
806 (!local->ops->tdls_channel_switch ||
807 !local->ops->tdls_cancel_channel_switch ||
808 !local->ops->tdls_recv_channel_switch))
809 return -EOPNOTSUPP;
810
811 #ifdef CONFIG_PM
812 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
813 return -EINVAL;
814 #endif
815
816 if (!local->use_chanctx) {
817 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
818 const struct ieee80211_iface_combination *comb;
819
820 comb = &local->hw.wiphy->iface_combinations[i];
821
822 if (comb->num_different_channels > 1)
823 return -EINVAL;
824 }
825 } else {
826 /*
827 * WDS is currently prohibited when channel contexts are used
828 * because there's no clear definition of which channel WDS
829 * type interfaces use
830 */
831 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
832 return -EINVAL;
833
834 /* DFS is not supported with multi-channel combinations yet */
835 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
836 const struct ieee80211_iface_combination *comb;
837
838 comb = &local->hw.wiphy->iface_combinations[i];
839
840 if (comb->radar_detect_widths &&
841 comb->num_different_channels > 1)
842 return -EINVAL;
843 }
844 }
845
846 /* Only HW csum features are currently compatible with mac80211 */
847 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
848 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
849 NETIF_F_GSO_SOFTWARE;
850 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
851 return -EINVAL;
852
853 if (hw->max_report_rates == 0)
854 hw->max_report_rates = hw->max_rates;
855
856 local->rx_chains = 1;
857
858 /*
859 * generic code guarantees at least one band,
860 * set this very early because much code assumes
861 * that hw.conf.channel is assigned
862 */
863 channels = 0;
864 max_bitrates = 0;
865 supp_ht = false;
866 supp_vht = false;
867 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
868 struct ieee80211_supported_band *sband;
869
870 sband = local->hw.wiphy->bands[band];
871 if (!sband)
872 continue;
873
874 if (!dflt_chandef.chan) {
875 cfg80211_chandef_create(&dflt_chandef,
876 &sband->channels[0],
877 NL80211_CHAN_NO_HT);
878 /* init channel we're on */
879 if (!local->use_chanctx && !local->_oper_chandef.chan) {
880 local->hw.conf.chandef = dflt_chandef;
881 local->_oper_chandef = dflt_chandef;
882 }
883 local->monitor_chandef = dflt_chandef;
884 }
885
886 channels += sband->n_channels;
887
888 if (max_bitrates < sband->n_bitrates)
889 max_bitrates = sband->n_bitrates;
890 supp_ht = supp_ht || sband->ht_cap.ht_supported;
891 supp_vht = supp_vht || sband->vht_cap.vht_supported;
892
893 if (sband->ht_cap.ht_supported)
894 local->rx_chains =
895 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
896 local->rx_chains);
897
898 /* TODO: consider VHT for RX chains, hopefully it's the same */
899 }
900
901 /* if low-level driver supports AP, we also support VLAN */
902 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
903 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
904 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
905 }
906
907 /* mac80211 always supports monitor */
908 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
909 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
910
911 /* mac80211 doesn't support more than one IBSS interface right now */
912 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
913 const struct ieee80211_iface_combination *c;
914 int j;
915
916 c = &hw->wiphy->iface_combinations[i];
917
918 for (j = 0; j < c->n_limits; j++)
919 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
920 c->limits[j].max > 1)
921 return -EINVAL;
922 }
923
924 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
925 sizeof(void *) * channels, GFP_KERNEL);
926 if (!local->int_scan_req)
927 return -ENOMEM;
928
929 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
930 if (!local->hw.wiphy->bands[band])
931 continue;
932 local->int_scan_req->rates[band] = (u32) -1;
933 }
934
935 #ifndef CONFIG_MAC80211_MESH
936 /* mesh depends on Kconfig, but drivers should set it if they want */
937 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
938 #endif
939
940 /* if the underlying driver supports mesh, mac80211 will (at least)
941 * provide routing of mesh authentication frames to userspace */
942 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
943 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
944
945 /* mac80211 supports control port protocol changing */
946 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
947
948 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
949 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
950 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
951 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
952 if (hw->max_signal <= 0) {
953 result = -EINVAL;
954 goto fail_wiphy_register;
955 }
956 }
957
958 /*
959 * Calculate scan IE length -- we need this to alloc
960 * memory and to subtract from the driver limit. It
961 * includes the DS Params, (extended) supported rates, and HT
962 * information -- SSID is the driver's responsibility.
963 */
964 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
965 3 /* DS Params */;
966 if (supp_ht)
967 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
968
969 if (supp_vht)
970 local->scan_ies_len +=
971 2 + sizeof(struct ieee80211_vht_cap);
972
973 if (!local->ops->hw_scan) {
974 /* For hw_scan, driver needs to set these up. */
975 local->hw.wiphy->max_scan_ssids = 4;
976 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
977 }
978
979 /*
980 * If the driver supports any scan IEs, then assume the
981 * limit includes the IEs mac80211 will add, otherwise
982 * leave it at zero and let the driver sort it out; we
983 * still pass our IEs to the driver but userspace will
984 * not be allowed to in that case.
985 */
986 if (local->hw.wiphy->max_scan_ie_len)
987 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
988
989 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
990 local->hw.n_cipher_schemes));
991
992 result = ieee80211_init_cipher_suites(local);
993 if (result < 0)
994 goto fail_wiphy_register;
995
996 if (!local->ops->remain_on_channel)
997 local->hw.wiphy->max_remain_on_channel_duration = 5000;
998
999 /* mac80211 based drivers don't support internal TDLS setup */
1000 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1001 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1002
1003 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1004 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1005 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1006
1007 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1008
1009 result = wiphy_register(local->hw.wiphy);
1010 if (result < 0)
1011 goto fail_wiphy_register;
1012
1013 /*
1014 * We use the number of queues for feature tests (QoS, HT) internally
1015 * so restrict them appropriately.
1016 */
1017 if (hw->queues > IEEE80211_MAX_QUEUES)
1018 hw->queues = IEEE80211_MAX_QUEUES;
1019
1020 local->workqueue =
1021 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1022 if (!local->workqueue) {
1023 result = -ENOMEM;
1024 goto fail_workqueue;
1025 }
1026
1027 /*
1028 * The hardware needs headroom for sending the frame,
1029 * and we need some headroom for passing the frame to monitor
1030 * interfaces, but never both at the same time.
1031 */
1032 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1033 IEEE80211_TX_STATUS_HEADROOM);
1034
1035 debugfs_hw_add(local);
1036
1037 /*
1038 * if the driver doesn't specify a max listen interval we
1039 * use 5 which should be a safe default
1040 */
1041 if (local->hw.max_listen_interval == 0)
1042 local->hw.max_listen_interval = 5;
1043
1044 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1045
1046 local->dynamic_ps_forced_timeout = -1;
1047
1048 if (!local->hw.txq_ac_max_pending)
1049 local->hw.txq_ac_max_pending = 64;
1050
1051 result = ieee80211_wep_init(local);
1052 if (result < 0)
1053 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1054 result);
1055
1056 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1057
1058 ieee80211_led_init(local);
1059
1060 rtnl_lock();
1061
1062 result = ieee80211_init_rate_ctrl_alg(local,
1063 hw->rate_control_algorithm);
1064 if (result < 0) {
1065 wiphy_debug(local->hw.wiphy,
1066 "Failed to initialize rate control algorithm\n");
1067 goto fail_rate;
1068 }
1069
1070 /* add one default STA interface if supported */
1071 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1072 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1073 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1074 NL80211_IFTYPE_STATION, NULL);
1075 if (result)
1076 wiphy_warn(local->hw.wiphy,
1077 "Failed to add default virtual iface\n");
1078 }
1079
1080 rtnl_unlock();
1081
1082 local->network_latency_notifier.notifier_call =
1083 ieee80211_max_network_latency;
1084 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1085 &local->network_latency_notifier);
1086 if (result)
1087 goto fail_pm_qos;
1088
1089 #ifdef CONFIG_INET
1090 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1091 result = register_inetaddr_notifier(&local->ifa_notifier);
1092 if (result)
1093 goto fail_ifa;
1094 #endif
1095
1096 #if IS_ENABLED(CONFIG_IPV6)
1097 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1098 result = register_inet6addr_notifier(&local->ifa6_notifier);
1099 if (result)
1100 goto fail_ifa6;
1101 #endif
1102
1103 return 0;
1104
1105 #if IS_ENABLED(CONFIG_IPV6)
1106 fail_ifa6:
1107 #ifdef CONFIG_INET
1108 unregister_inetaddr_notifier(&local->ifa_notifier);
1109 #endif
1110 #endif
1111 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1112 fail_ifa:
1113 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1114 &local->network_latency_notifier);
1115 #endif
1116 fail_pm_qos:
1117 rtnl_lock();
1118 rate_control_deinitialize(local);
1119 ieee80211_remove_interfaces(local);
1120 fail_rate:
1121 rtnl_unlock();
1122 ieee80211_led_exit(local);
1123 ieee80211_wep_free(local);
1124 destroy_workqueue(local->workqueue);
1125 fail_workqueue:
1126 wiphy_unregister(local->hw.wiphy);
1127 fail_wiphy_register:
1128 if (local->wiphy_ciphers_allocated)
1129 kfree(local->hw.wiphy->cipher_suites);
1130 kfree(local->int_scan_req);
1131 return result;
1132 }
1133 EXPORT_SYMBOL(ieee80211_register_hw);
1134
1135 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1136 struct net_device *napi_dev,
1137 int (*poll)(struct napi_struct *, int),
1138 int weight)
1139 {
1140 struct ieee80211_local *local = hw_to_local(hw);
1141
1142 netif_napi_add(napi_dev, napi, poll, weight);
1143 local->napi = napi;
1144 }
1145 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1146
1147 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1148 {
1149 struct ieee80211_local *local = hw_to_local(hw);
1150
1151 tasklet_kill(&local->tx_pending_tasklet);
1152 tasklet_kill(&local->tasklet);
1153
1154 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1155 &local->network_latency_notifier);
1156 #ifdef CONFIG_INET
1157 unregister_inetaddr_notifier(&local->ifa_notifier);
1158 #endif
1159 #if IS_ENABLED(CONFIG_IPV6)
1160 unregister_inet6addr_notifier(&local->ifa6_notifier);
1161 #endif
1162
1163 rtnl_lock();
1164
1165 /*
1166 * At this point, interface list manipulations are fine
1167 * because the driver cannot be handing us frames any
1168 * more and the tasklet is killed.
1169 */
1170 ieee80211_remove_interfaces(local);
1171
1172 rtnl_unlock();
1173
1174 cancel_work_sync(&local->restart_work);
1175 cancel_work_sync(&local->reconfig_filter);
1176 flush_work(&local->sched_scan_stopped_work);
1177
1178 ieee80211_clear_tx_pending(local);
1179 rate_control_deinitialize(local);
1180
1181 if (skb_queue_len(&local->skb_queue) ||
1182 skb_queue_len(&local->skb_queue_unreliable))
1183 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1184 skb_queue_purge(&local->skb_queue);
1185 skb_queue_purge(&local->skb_queue_unreliable);
1186
1187 destroy_workqueue(local->workqueue);
1188 wiphy_unregister(local->hw.wiphy);
1189 ieee80211_wep_free(local);
1190 ieee80211_led_exit(local);
1191 kfree(local->int_scan_req);
1192 }
1193 EXPORT_SYMBOL(ieee80211_unregister_hw);
1194
1195 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1196 {
1197 WARN_ONCE(1, "Have pending ack frames!\n");
1198 kfree_skb(p);
1199 return 0;
1200 }
1201
1202 void ieee80211_free_hw(struct ieee80211_hw *hw)
1203 {
1204 struct ieee80211_local *local = hw_to_local(hw);
1205
1206 mutex_destroy(&local->iflist_mtx);
1207 mutex_destroy(&local->mtx);
1208
1209 if (local->wiphy_ciphers_allocated)
1210 kfree(local->hw.wiphy->cipher_suites);
1211
1212 idr_for_each(&local->ack_status_frames,
1213 ieee80211_free_ack_frame, NULL);
1214 idr_destroy(&local->ack_status_frames);
1215
1216 sta_info_stop(local);
1217
1218 ieee80211_free_led_names(local);
1219
1220 wiphy_free(local->hw.wiphy);
1221 }
1222 EXPORT_SYMBOL(ieee80211_free_hw);
1223
1224 static int __init ieee80211_init(void)
1225 {
1226 struct sk_buff *skb;
1227 int ret;
1228
1229 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1230 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1231 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1232
1233 ret = rc80211_minstrel_init();
1234 if (ret)
1235 return ret;
1236
1237 ret = rc80211_minstrel_ht_init();
1238 if (ret)
1239 goto err_minstrel;
1240
1241 ret = ieee80211_iface_init();
1242 if (ret)
1243 goto err_netdev;
1244
1245 return 0;
1246 err_netdev:
1247 rc80211_minstrel_ht_exit();
1248 err_minstrel:
1249 rc80211_minstrel_exit();
1250
1251 return ret;
1252 }
1253
1254 static void __exit ieee80211_exit(void)
1255 {
1256 rc80211_minstrel_ht_exit();
1257 rc80211_minstrel_exit();
1258
1259 ieee80211s_stop();
1260
1261 ieee80211_iface_exit();
1262
1263 rcu_barrier();
1264 }
1265
1266
1267 subsys_initcall(ieee80211_init);
1268 module_exit(ieee80211_exit);
1269
1270 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1271 MODULE_LICENSE("GPL");
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