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Linux 4.1.16
[linux/fpc-iii.git] / net / mac80211 / main.c
blobe86daed83c6fbd14ae34b55b8f6f6dd713e7282d
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/pm_qos.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "cfg.h"
36 #include "debugfs.h"
37
38 void ieee80211_configure_filter(struct ieee80211_local *local)
39 {
40 u64 mc;
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
43
44 if (atomic_read(&local->iff_promiscs))
45 new_flags |= FIF_PROMISC_IN_BSS;
46
47 if (atomic_read(&local->iff_allmultis))
48 new_flags |= FIF_ALLMULTI;
49
50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
51 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
52 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53
54 if (local->fif_probe_req || local->probe_req_reg)
55 new_flags |= FIF_PROBE_REQ;
56
57 if (local->fif_fcsfail)
58 new_flags |= FIF_FCSFAIL;
59
60 if (local->fif_plcpfail)
61 new_flags |= FIF_PLCPFAIL;
62
63 if (local->fif_control)
64 new_flags |= FIF_CONTROL;
65
66 if (local->fif_other_bss)
67 new_flags |= FIF_OTHER_BSS;
68
69 if (local->fif_pspoll)
70 new_flags |= FIF_PSPOLL;
71
72 spin_lock_bh(&local->filter_lock);
73 changed_flags = local->filter_flags ^ new_flags;
74
75 mc = drv_prepare_multicast(local, &local->mc_list);
76 spin_unlock_bh(&local->filter_lock);
77
78 /* be a bit nasty */
79 new_flags |= (1<<31);
80
81 drv_configure_filter(local, changed_flags, &new_flags, mc);
82
83 WARN_ON(new_flags & (1<<31));
84
85 local->filter_flags = new_flags & ~(1<<31);
86 }
87
88 static void ieee80211_reconfig_filter(struct work_struct *work)
89 {
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
92
93 ieee80211_configure_filter(local);
94 }
95
96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 {
98 struct ieee80211_sub_if_data *sdata;
99 struct cfg80211_chan_def chandef = {};
100 u32 changed = 0;
101 int power;
102 u32 offchannel_flag;
103
104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105
106 if (local->scan_chandef.chan) {
107 chandef = local->scan_chandef;
108 } else if (local->tmp_channel) {
109 chandef.chan = local->tmp_channel;
110 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
111 chandef.center_freq1 = chandef.chan->center_freq;
112 } else
113 chandef = local->_oper_chandef;
114
115 WARN(!cfg80211_chandef_valid(&chandef),
116 "control:%d MHz width:%d center: %d/%d MHz",
117 chandef.chan->center_freq, chandef.width,
118 chandef.center_freq1, chandef.center_freq2);
119
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 else
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 }
133
134 if (!conf_is_ht(&local->hw.conf)) {
135 /*
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
139 */
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
144 }
145
146 power = ieee80211_chandef_max_power(&chandef);
147
148 rcu_read_lock();
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151 continue;
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 continue;
154 power = min(power, sdata->vif.bss_conf.txpower);
155 }
156 rcu_read_unlock();
157
158 if (local->hw.conf.power_level != power) {
159 changed |= IEEE80211_CONF_CHANGE_POWER;
160 local->hw.conf.power_level = power;
161 }
162
163 return changed;
164 }
165
166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 {
168 int ret = 0;
169
170 might_sleep();
171
172 if (!local->use_chanctx)
173 changed |= ieee80211_hw_conf_chan(local);
174 else
175 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
176 IEEE80211_CONF_CHANGE_POWER);
177
178 if (changed && local->open_count) {
179 ret = drv_config(local, changed);
180 /*
181 * Goal:
182 * HW reconfiguration should never fail, the driver has told
183 * us what it can support so it should live up to that promise.
184 *
185 * Current status:
186 * rfkill is not integrated with mac80211 and a
187 * configuration command can thus fail if hardware rfkill
188 * is enabled
189 *
190 * FIXME: integrate rfkill with mac80211 and then add this
191 * WARN_ON() back
192 *
193 */
194 /* WARN_ON(ret); */
195 }
196
197 return ret;
198 }
199
200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
201 u32 changed)
202 {
203 struct ieee80211_local *local = sdata->local;
204
205 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
206 return;
207
208 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
209 }
210
211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212 {
213 sdata->vif.bss_conf.use_cts_prot = false;
214 sdata->vif.bss_conf.use_short_preamble = false;
215 sdata->vif.bss_conf.use_short_slot = false;
216 return BSS_CHANGED_ERP_CTS_PROT |
217 BSS_CHANGED_ERP_PREAMBLE |
218 BSS_CHANGED_ERP_SLOT;
219 }
220
221 static void ieee80211_tasklet_handler(unsigned long data)
222 {
223 struct ieee80211_local *local = (struct ieee80211_local *) data;
224 struct sk_buff *skb;
225
226 while ((skb = skb_dequeue(&local->skb_queue)) ||
227 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
228 switch (skb->pkt_type) {
229 case IEEE80211_RX_MSG:
230 /* Clear skb->pkt_type in order to not confuse kernel
231 * netstack. */
232 skb->pkt_type = 0;
233 ieee80211_rx(&local->hw, skb);
234 break;
235 case IEEE80211_TX_STATUS_MSG:
236 skb->pkt_type = 0;
237 ieee80211_tx_status(&local->hw, skb);
238 break;
239 default:
240 WARN(1, "mac80211: Packet is of unknown type %d\n",
241 skb->pkt_type);
242 dev_kfree_skb(skb);
243 break;
244 }
245 }
246 }
247
248 static void ieee80211_restart_work(struct work_struct *work)
249 {
250 struct ieee80211_local *local =
251 container_of(work, struct ieee80211_local, restart_work);
252 struct ieee80211_sub_if_data *sdata;
253
254 /* wait for scan work complete */
255 flush_workqueue(local->workqueue);
256
257 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
258 "%s called with hardware scan in progress\n", __func__);
259
260 rtnl_lock();
261 list_for_each_entry(sdata, &local->interfaces, list)
262 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
263 ieee80211_scan_cancel(local);
264 ieee80211_reconfig(local);
265 rtnl_unlock();
266 }
267
268 void ieee80211_restart_hw(struct ieee80211_hw *hw)
269 {
270 struct ieee80211_local *local = hw_to_local(hw);
271
272 trace_api_restart_hw(local);
273
274 wiphy_info(hw->wiphy,
275 "Hardware restart was requested\n");
276
277 /* use this reason, ieee80211_reconfig will unblock it */
278 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
279 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
280 false);
281
282 /*
283 * Stop all Rx during the reconfig. We don't want state changes
284 * or driver callbacks while this is in progress.
285 */
286 local->in_reconfig = true;
287 barrier();
288
289 schedule_work(&local->restart_work);
290 }
291 EXPORT_SYMBOL(ieee80211_restart_hw);
292
293 #ifdef CONFIG_INET
294 static int ieee80211_ifa_changed(struct notifier_block *nb,
295 unsigned long data, void *arg)
296 {
297 struct in_ifaddr *ifa = arg;
298 struct ieee80211_local *local =
299 container_of(nb, struct ieee80211_local,
300 ifa_notifier);
301 struct net_device *ndev = ifa->ifa_dev->dev;
302 struct wireless_dev *wdev = ndev->ieee80211_ptr;
303 struct in_device *idev;
304 struct ieee80211_sub_if_data *sdata;
305 struct ieee80211_bss_conf *bss_conf;
306 struct ieee80211_if_managed *ifmgd;
307 int c = 0;
308
309 /* Make sure it's our interface that got changed */
310 if (!wdev)
311 return NOTIFY_DONE;
312
313 if (wdev->wiphy != local->hw.wiphy)
314 return NOTIFY_DONE;
315
316 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
317 bss_conf = &sdata->vif.bss_conf;
318
319 /* ARP filtering is only supported in managed mode */
320 if (sdata->vif.type != NL80211_IFTYPE_STATION)
321 return NOTIFY_DONE;
322
323 idev = __in_dev_get_rtnl(sdata->dev);
324 if (!idev)
325 return NOTIFY_DONE;
326
327 ifmgd = &sdata->u.mgd;
328 sdata_lock(sdata);
329
330 /* Copy the addresses to the bss_conf list */
331 ifa = idev->ifa_list;
332 while (ifa) {
333 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
334 bss_conf->arp_addr_list[c] = ifa->ifa_address;
335 ifa = ifa->ifa_next;
336 c++;
337 }
338
339 bss_conf->arp_addr_cnt = c;
340
341 /* Configure driver only if associated (which also implies it is up) */
342 if (ifmgd->associated)
343 ieee80211_bss_info_change_notify(sdata,
344 BSS_CHANGED_ARP_FILTER);
345
346 sdata_unlock(sdata);
347
348 return NOTIFY_OK;
349 }
350 #endif
351
352 #if IS_ENABLED(CONFIG_IPV6)
353 static int ieee80211_ifa6_changed(struct notifier_block *nb,
354 unsigned long data, void *arg)
355 {
356 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
357 struct inet6_dev *idev = ifa->idev;
358 struct net_device *ndev = ifa->idev->dev;
359 struct ieee80211_local *local =
360 container_of(nb, struct ieee80211_local, ifa6_notifier);
361 struct wireless_dev *wdev = ndev->ieee80211_ptr;
362 struct ieee80211_sub_if_data *sdata;
363
364 /* Make sure it's our interface that got changed */
365 if (!wdev || wdev->wiphy != local->hw.wiphy)
366 return NOTIFY_DONE;
367
368 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
369
370 /*
371 * For now only support station mode. This is mostly because
372 * doing AP would have to handle AP_VLAN in some way ...
373 */
374 if (sdata->vif.type != NL80211_IFTYPE_STATION)
375 return NOTIFY_DONE;
376
377 drv_ipv6_addr_change(local, sdata, idev);
378
379 return NOTIFY_OK;
380 }
381 #endif
382
383 /* There isn't a lot of sense in it, but you can transmit anything you like */
384 static const struct ieee80211_txrx_stypes
385 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
386 [NL80211_IFTYPE_ADHOC] = {
387 .tx = 0xffff,
388 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
389 BIT(IEEE80211_STYPE_AUTH >> 4) |
390 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
392 },
393 [NL80211_IFTYPE_STATION] = {
394 .tx = 0xffff,
395 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
397 },
398 [NL80211_IFTYPE_AP] = {
399 .tx = 0xffff,
400 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
401 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
402 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
403 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
404 BIT(IEEE80211_STYPE_AUTH >> 4) |
405 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
406 BIT(IEEE80211_STYPE_ACTION >> 4),
407 },
408 [NL80211_IFTYPE_AP_VLAN] = {
409 /* copy AP */
410 .tx = 0xffff,
411 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
412 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
413 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
414 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
415 BIT(IEEE80211_STYPE_AUTH >> 4) |
416 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417 BIT(IEEE80211_STYPE_ACTION >> 4),
418 },
419 [NL80211_IFTYPE_P2P_CLIENT] = {
420 .tx = 0xffff,
421 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
423 },
424 [NL80211_IFTYPE_P2P_GO] = {
425 .tx = 0xffff,
426 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
427 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
429 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
430 BIT(IEEE80211_STYPE_AUTH >> 4) |
431 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
432 BIT(IEEE80211_STYPE_ACTION >> 4),
433 },
434 [NL80211_IFTYPE_MESH_POINT] = {
435 .tx = 0xffff,
436 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
437 BIT(IEEE80211_STYPE_AUTH >> 4) |
438 BIT(IEEE80211_STYPE_DEAUTH >> 4),
439 },
440 [NL80211_IFTYPE_P2P_DEVICE] = {
441 .tx = 0xffff,
442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
443 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
444 },
445 };
446
447 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
448 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
449 IEEE80211_HT_AMPDU_PARM_DENSITY,
450
451 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
452 IEEE80211_HT_CAP_MAX_AMSDU |
453 IEEE80211_HT_CAP_SGI_20 |
454 IEEE80211_HT_CAP_SGI_40 |
455 IEEE80211_HT_CAP_LDPC_CODING |
456 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
457 .mcs = {
458 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
459 0xff, 0xff, 0xff, 0xff, 0xff, },
460 },
461 };
462
463 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
464 .vht_cap_info =
465 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
466 IEEE80211_VHT_CAP_SHORT_GI_80 |
467 IEEE80211_VHT_CAP_SHORT_GI_160 |
468 IEEE80211_VHT_CAP_RXSTBC_1 |
469 IEEE80211_VHT_CAP_RXSTBC_2 |
470 IEEE80211_VHT_CAP_RXSTBC_3 |
471 IEEE80211_VHT_CAP_RXSTBC_4 |
472 IEEE80211_VHT_CAP_TXSTBC |
473 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
474 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
475 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
476 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
477 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
478 .supp_mcs = {
479 .rx_mcs_map = cpu_to_le16(~0),
480 .tx_mcs_map = cpu_to_le16(~0),
481 },
482 };
483
484 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
485 const struct ieee80211_ops *ops,
486 const char *requested_name)
487 {
488 struct ieee80211_local *local;
489 int priv_size, i;
490 struct wiphy *wiphy;
491 bool use_chanctx;
492
493 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
494 !ops->add_interface || !ops->remove_interface ||
495 !ops->configure_filter))
496 return NULL;
497
498 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
499 return NULL;
500
501 /* check all or no channel context operations exist */
502 i = !!ops->add_chanctx + !!ops->remove_chanctx +
503 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
504 !!ops->unassign_vif_chanctx;
505 if (WARN_ON(i != 0 && i != 5))
506 return NULL;
507 use_chanctx = i == 5;
508
509 /* Ensure 32-byte alignment of our private data and hw private data.
510 * We use the wiphy priv data for both our ieee80211_local and for
511 * the driver's private data
512 *
513 * In memory it'll be like this:
514 *
515 * +-------------------------+
516 * | struct wiphy |
517 * +-------------------------+
518 * | struct ieee80211_local |
519 * +-------------------------+
520 * | driver's private data |
521 * +-------------------------+
522 *
523 */
524 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
525
526 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
527
528 if (!wiphy)
529 return NULL;
530
531 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
532
533 wiphy->privid = mac80211_wiphy_privid;
534
535 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
536 WIPHY_FLAG_4ADDR_AP |
537 WIPHY_FLAG_4ADDR_STATION |
538 WIPHY_FLAG_REPORTS_OBSS |
539 WIPHY_FLAG_OFFCHAN_TX;
540
541 if (ops->remain_on_channel)
542 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
543
544 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
545 NL80211_FEATURE_SAE |
546 NL80211_FEATURE_HT_IBSS |
547 NL80211_FEATURE_VIF_TXPOWER |
548 NL80211_FEATURE_MAC_ON_CREATE |
549 NL80211_FEATURE_USERSPACE_MPM;
550
551 if (!ops->hw_scan)
552 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
553 NL80211_FEATURE_AP_SCAN;
554
555
556 if (!ops->set_key)
557 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
558
559 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
560
561 local = wiphy_priv(wiphy);
562
563 if (sta_info_init(local))
564 goto err_free;
565
566 local->hw.wiphy = wiphy;
567
568 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
569
570 local->ops = ops;
571 local->use_chanctx = use_chanctx;
572
573 /* set up some defaults */
574 local->hw.queues = 1;
575 local->hw.max_rates = 1;
576 local->hw.max_report_rates = 0;
577 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
578 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
580 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
581 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
582 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
583 IEEE80211_RADIOTAP_MCS_HAVE_GI |
584 IEEE80211_RADIOTAP_MCS_HAVE_BW;
585 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
586 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
587 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
588 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
589 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
590 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
591 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
592
593 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
594
595 wiphy->extended_capabilities = local->ext_capa;
596 wiphy->extended_capabilities_mask = local->ext_capa;
597 wiphy->extended_capabilities_len =
598 ARRAY_SIZE(local->ext_capa);
599
600 INIT_LIST_HEAD(&local->interfaces);
601
602 __hw_addr_init(&local->mc_list);
603
604 mutex_init(&local->iflist_mtx);
605 mutex_init(&local->mtx);
606
607 mutex_init(&local->key_mtx);
608 spin_lock_init(&local->filter_lock);
609 spin_lock_init(&local->rx_path_lock);
610 spin_lock_init(&local->queue_stop_reason_lock);
611
612 INIT_LIST_HEAD(&local->chanctx_list);
613 mutex_init(&local->chanctx_mtx);
614
615 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
616
617 INIT_WORK(&local->restart_work, ieee80211_restart_work);
618
619 INIT_WORK(&local->radar_detected_work,
620 ieee80211_dfs_radar_detected_work);
621
622 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
623 local->smps_mode = IEEE80211_SMPS_OFF;
624
625 INIT_WORK(&local->dynamic_ps_enable_work,
626 ieee80211_dynamic_ps_enable_work);
627 INIT_WORK(&local->dynamic_ps_disable_work,
628 ieee80211_dynamic_ps_disable_work);
629 setup_timer(&local->dynamic_ps_timer,
630 ieee80211_dynamic_ps_timer, (unsigned long) local);
631
632 INIT_WORK(&local->sched_scan_stopped_work,
633 ieee80211_sched_scan_stopped_work);
634
635 spin_lock_init(&local->ack_status_lock);
636 idr_init(&local->ack_status_frames);
637
638 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
639 skb_queue_head_init(&local->pending[i]);
640 atomic_set(&local->agg_queue_stop[i], 0);
641 }
642 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
643 (unsigned long)local);
644
645 tasklet_init(&local->tasklet,
646 ieee80211_tasklet_handler,
647 (unsigned long) local);
648
649 skb_queue_head_init(&local->skb_queue);
650 skb_queue_head_init(&local->skb_queue_unreliable);
651
652 ieee80211_led_names(local);
653
654 ieee80211_roc_setup(local);
655
656 return &local->hw;
657 err_free:
658 wiphy_free(wiphy);
659 return NULL;
660 }
661 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
662
663 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
664 {
665 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
666 IS_ERR(local->wep_rx_tfm));
667 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
668 int n_suites = 0, r = 0, w = 0;
669 u32 *suites;
670 static const u32 cipher_suites[] = {
671 /* keep WEP first, it may be removed below */
672 WLAN_CIPHER_SUITE_WEP40,
673 WLAN_CIPHER_SUITE_WEP104,
674 WLAN_CIPHER_SUITE_TKIP,
675 WLAN_CIPHER_SUITE_CCMP,
676 WLAN_CIPHER_SUITE_CCMP_256,
677 WLAN_CIPHER_SUITE_GCMP,
678 WLAN_CIPHER_SUITE_GCMP_256,
679
680 /* keep last -- depends on hw flags! */
681 WLAN_CIPHER_SUITE_AES_CMAC,
682 WLAN_CIPHER_SUITE_BIP_CMAC_256,
683 WLAN_CIPHER_SUITE_BIP_GMAC_128,
684 WLAN_CIPHER_SUITE_BIP_GMAC_256,
685 };
686
687 if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
688 local->hw.wiphy->cipher_suites) {
689 /* If the driver advertises, or doesn't support SW crypto,
690 * we only need to remove WEP if necessary.
691 */
692 if (have_wep)
693 return 0;
694
695 /* well if it has _no_ ciphers ... fine */
696 if (!local->hw.wiphy->n_cipher_suites)
697 return 0;
698
699 /* Driver provides cipher suites, but we need to exclude WEP */
700 suites = kmemdup(local->hw.wiphy->cipher_suites,
701 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
702 GFP_KERNEL);
703 if (!suites)
704 return -ENOMEM;
705
706 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
707 u32 suite = local->hw.wiphy->cipher_suites[r];
708
709 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
710 suite == WLAN_CIPHER_SUITE_WEP104)
711 continue;
712 suites[w++] = suite;
713 }
714 } else if (!local->hw.cipher_schemes) {
715 /* If the driver doesn't have cipher schemes, there's nothing
716 * else to do other than assign the (software supported and
717 * perhaps offloaded) cipher suites.
718 */
719 local->hw.wiphy->cipher_suites = cipher_suites;
720 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
721
722 if (!have_mfp)
723 local->hw.wiphy->n_cipher_suites -= 4;
724
725 if (!have_wep) {
726 local->hw.wiphy->cipher_suites += 2;
727 local->hw.wiphy->n_cipher_suites -= 2;
728 }
729
730 /* not dynamically allocated, so just return */
731 return 0;
732 } else {
733 const struct ieee80211_cipher_scheme *cs;
734
735 cs = local->hw.cipher_schemes;
736
737 /* Driver specifies cipher schemes only (but not cipher suites
738 * including the schemes)
739 *
740 * We start counting ciphers defined by schemes, TKIP, CCMP,
741 * CCMP-256, GCMP, and GCMP-256
742 */
743 n_suites = local->hw.n_cipher_schemes + 5;
744
745 /* check if we have WEP40 and WEP104 */
746 if (have_wep)
747 n_suites += 2;
748
749 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
750 * BIP-GMAC-256
751 */
752 if (have_mfp)
753 n_suites += 4;
754
755 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
756 if (!suites)
757 return -ENOMEM;
758
759 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
760 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
761 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
762 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
763 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
764
765 if (have_wep) {
766 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
767 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
768 }
769
770 if (have_mfp) {
771 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
772 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
773 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
774 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
775 }
776
777 for (r = 0; r < local->hw.n_cipher_schemes; r++)
778 suites[w++] = cs[r].cipher;
779 }
780
781 local->hw.wiphy->cipher_suites = suites;
782 local->hw.wiphy->n_cipher_suites = w;
783 local->wiphy_ciphers_allocated = true;
784
785 return 0;
786 }
787
788 int ieee80211_register_hw(struct ieee80211_hw *hw)
789 {
790 struct ieee80211_local *local = hw_to_local(hw);
791 int result, i;
792 enum ieee80211_band band;
793 int channels, max_bitrates;
794 bool supp_ht, supp_vht;
795 netdev_features_t feature_whitelist;
796 struct cfg80211_chan_def dflt_chandef = {};
797
798 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
799 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
800 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
801 return -EINVAL;
802
803 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
804 (!local->ops->tdls_channel_switch ||
805 !local->ops->tdls_cancel_channel_switch ||
806 !local->ops->tdls_recv_channel_switch))
807 return -EOPNOTSUPP;
808
809 #ifdef CONFIG_PM
810 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
811 return -EINVAL;
812 #endif
813
814 if (!local->use_chanctx) {
815 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
816 const struct ieee80211_iface_combination *comb;
817
818 comb = &local->hw.wiphy->iface_combinations[i];
819
820 if (comb->num_different_channels > 1)
821 return -EINVAL;
822 }
823 } else {
824 /*
825 * WDS is currently prohibited when channel contexts are used
826 * because there's no clear definition of which channel WDS
827 * type interfaces use
828 */
829 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
830 return -EINVAL;
831
832 /* DFS is not supported with multi-channel combinations yet */
833 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
834 const struct ieee80211_iface_combination *comb;
835
836 comb = &local->hw.wiphy->iface_combinations[i];
837
838 if (comb->radar_detect_widths &&
839 comb->num_different_channels > 1)
840 return -EINVAL;
841 }
842 }
843
844 /* Only HW csum features are currently compatible with mac80211 */
845 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
846 NETIF_F_HW_CSUM;
847 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
848 return -EINVAL;
849
850 if (hw->max_report_rates == 0)
851 hw->max_report_rates = hw->max_rates;
852
853 local->rx_chains = 1;
854
855 /*
856 * generic code guarantees at least one band,
857 * set this very early because much code assumes
858 * that hw.conf.channel is assigned
859 */
860 channels = 0;
861 max_bitrates = 0;
862 supp_ht = false;
863 supp_vht = false;
864 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
865 struct ieee80211_supported_band *sband;
866
867 sband = local->hw.wiphy->bands[band];
868 if (!sband)
869 continue;
870
871 if (!dflt_chandef.chan) {
872 cfg80211_chandef_create(&dflt_chandef,
873 &sband->channels[0],
874 NL80211_CHAN_NO_HT);
875 /* init channel we're on */
876 if (!local->use_chanctx && !local->_oper_chandef.chan) {
877 local->hw.conf.chandef = dflt_chandef;
878 local->_oper_chandef = dflt_chandef;
879 }
880 local->monitor_chandef = dflt_chandef;
881 }
882
883 channels += sband->n_channels;
884
885 if (max_bitrates < sband->n_bitrates)
886 max_bitrates = sband->n_bitrates;
887 supp_ht = supp_ht || sband->ht_cap.ht_supported;
888 supp_vht = supp_vht || sband->vht_cap.vht_supported;
889
890 if (sband->ht_cap.ht_supported)
891 local->rx_chains =
892 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
893 local->rx_chains);
894
895 /* TODO: consider VHT for RX chains, hopefully it's the same */
896 }
897
898 /* if low-level driver supports AP, we also support VLAN */
899 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
900 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
901 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
902 }
903
904 /* mac80211 always supports monitor */
905 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
906 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
907
908 /* mac80211 doesn't support more than one IBSS interface right now */
909 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
910 const struct ieee80211_iface_combination *c;
911 int j;
912
913 c = &hw->wiphy->iface_combinations[i];
914
915 for (j = 0; j < c->n_limits; j++)
916 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
917 c->limits[j].max > 1)
918 return -EINVAL;
919 }
920
921 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
922 sizeof(void *) * channels, GFP_KERNEL);
923 if (!local->int_scan_req)
924 return -ENOMEM;
925
926 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
927 if (!local->hw.wiphy->bands[band])
928 continue;
929 local->int_scan_req->rates[band] = (u32) -1;
930 }
931
932 #ifndef CONFIG_MAC80211_MESH
933 /* mesh depends on Kconfig, but drivers should set it if they want */
934 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
935 #endif
936
937 /* if the underlying driver supports mesh, mac80211 will (at least)
938 * provide routing of mesh authentication frames to userspace */
939 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
940 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
941
942 /* mac80211 supports control port protocol changing */
943 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
944
945 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
946 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
947 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
948 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
949 if (hw->max_signal <= 0) {
950 result = -EINVAL;
951 goto fail_wiphy_register;
952 }
953 }
954
955 /*
956 * Calculate scan IE length -- we need this to alloc
957 * memory and to subtract from the driver limit. It
958 * includes the DS Params, (extended) supported rates, and HT
959 * information -- SSID is the driver's responsibility.
960 */
961 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
962 3 /* DS Params */;
963 if (supp_ht)
964 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
965
966 if (supp_vht)
967 local->scan_ies_len +=
968 2 + sizeof(struct ieee80211_vht_cap);
969
970 if (!local->ops->hw_scan) {
971 /* For hw_scan, driver needs to set these up. */
972 local->hw.wiphy->max_scan_ssids = 4;
973 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
974 }
975
976 /*
977 * If the driver supports any scan IEs, then assume the
978 * limit includes the IEs mac80211 will add, otherwise
979 * leave it at zero and let the driver sort it out; we
980 * still pass our IEs to the driver but userspace will
981 * not be allowed to in that case.
982 */
983 if (local->hw.wiphy->max_scan_ie_len)
984 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
985
986 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
987 local->hw.n_cipher_schemes));
988
989 result = ieee80211_init_cipher_suites(local);
990 if (result < 0)
991 goto fail_wiphy_register;
992
993 if (!local->ops->remain_on_channel)
994 local->hw.wiphy->max_remain_on_channel_duration = 5000;
995
996 /* mac80211 based drivers don't support internal TDLS setup */
997 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
998 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
999
1000 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1001 if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
1002 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1003
1004 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1005
1006 result = wiphy_register(local->hw.wiphy);
1007 if (result < 0)
1008 goto fail_wiphy_register;
1009
1010 /*
1011 * We use the number of queues for feature tests (QoS, HT) internally
1012 * so restrict them appropriately.
1013 */
1014 if (hw->queues > IEEE80211_MAX_QUEUES)
1015 hw->queues = IEEE80211_MAX_QUEUES;
1016
1017 local->workqueue =
1018 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1019 if (!local->workqueue) {
1020 result = -ENOMEM;
1021 goto fail_workqueue;
1022 }
1023
1024 /*
1025 * The hardware needs headroom for sending the frame,
1026 * and we need some headroom for passing the frame to monitor
1027 * interfaces, but never both at the same time.
1028 */
1029 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1030 IEEE80211_TX_STATUS_HEADROOM);
1031
1032 debugfs_hw_add(local);
1033
1034 /*
1035 * if the driver doesn't specify a max listen interval we
1036 * use 5 which should be a safe default
1037 */
1038 if (local->hw.max_listen_interval == 0)
1039 local->hw.max_listen_interval = 5;
1040
1041 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1042
1043 local->dynamic_ps_forced_timeout = -1;
1044
1045 if (!local->hw.txq_ac_max_pending)
1046 local->hw.txq_ac_max_pending = 64;
1047
1048 result = ieee80211_wep_init(local);
1049 if (result < 0)
1050 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1051 result);
1052
1053 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1054
1055 ieee80211_led_init(local);
1056
1057 rtnl_lock();
1058
1059 result = ieee80211_init_rate_ctrl_alg(local,
1060 hw->rate_control_algorithm);
1061 if (result < 0) {
1062 wiphy_debug(local->hw.wiphy,
1063 "Failed to initialize rate control algorithm\n");
1064 goto fail_rate;
1065 }
1066
1067 /* add one default STA interface if supported */
1068 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1069 !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1070 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1071 NL80211_IFTYPE_STATION, NULL);
1072 if (result)
1073 wiphy_warn(local->hw.wiphy,
1074 "Failed to add default virtual iface\n");
1075 }
1076
1077 rtnl_unlock();
1078
1079 local->network_latency_notifier.notifier_call =
1080 ieee80211_max_network_latency;
1081 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1082 &local->network_latency_notifier);
1083 if (result)
1084 goto fail_pm_qos;
1085
1086 #ifdef CONFIG_INET
1087 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1088 result = register_inetaddr_notifier(&local->ifa_notifier);
1089 if (result)
1090 goto fail_ifa;
1091 #endif
1092
1093 #if IS_ENABLED(CONFIG_IPV6)
1094 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1095 result = register_inet6addr_notifier(&local->ifa6_notifier);
1096 if (result)
1097 goto fail_ifa6;
1098 #endif
1099
1100 return 0;
1101
1102 #if IS_ENABLED(CONFIG_IPV6)
1103 fail_ifa6:
1104 #ifdef CONFIG_INET
1105 unregister_inetaddr_notifier(&local->ifa_notifier);
1106 #endif
1107 #endif
1108 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1109 fail_ifa:
1110 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1111 &local->network_latency_notifier);
1112 #endif
1113 fail_pm_qos:
1114 rtnl_lock();
1115 rate_control_deinitialize(local);
1116 ieee80211_remove_interfaces(local);
1117 fail_rate:
1118 rtnl_unlock();
1119 ieee80211_led_exit(local);
1120 ieee80211_wep_free(local);
1121 destroy_workqueue(local->workqueue);
1122 fail_workqueue:
1123 wiphy_unregister(local->hw.wiphy);
1124 fail_wiphy_register:
1125 if (local->wiphy_ciphers_allocated)
1126 kfree(local->hw.wiphy->cipher_suites);
1127 kfree(local->int_scan_req);
1128 return result;
1129 }
1130 EXPORT_SYMBOL(ieee80211_register_hw);
1131
1132 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1133 struct net_device *napi_dev,
1134 int (*poll)(struct napi_struct *, int),
1135 int weight)
1136 {
1137 struct ieee80211_local *local = hw_to_local(hw);
1138
1139 netif_napi_add(napi_dev, napi, poll, weight);
1140 local->napi = napi;
1141 }
1142 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1143
1144 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1145 {
1146 struct ieee80211_local *local = hw_to_local(hw);
1147
1148 tasklet_kill(&local->tx_pending_tasklet);
1149 tasklet_kill(&local->tasklet);
1150
1151 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1152 &local->network_latency_notifier);
1153 #ifdef CONFIG_INET
1154 unregister_inetaddr_notifier(&local->ifa_notifier);
1155 #endif
1156 #if IS_ENABLED(CONFIG_IPV6)
1157 unregister_inet6addr_notifier(&local->ifa6_notifier);
1158 #endif
1159
1160 rtnl_lock();
1161
1162 /*
1163 * At this point, interface list manipulations are fine
1164 * because the driver cannot be handing us frames any
1165 * more and the tasklet is killed.
1166 */
1167 ieee80211_remove_interfaces(local);
1168
1169 rtnl_unlock();
1170
1171 cancel_work_sync(&local->restart_work);
1172 cancel_work_sync(&local->reconfig_filter);
1173 flush_work(&local->sched_scan_stopped_work);
1174
1175 ieee80211_clear_tx_pending(local);
1176 rate_control_deinitialize(local);
1177
1178 if (skb_queue_len(&local->skb_queue) ||
1179 skb_queue_len(&local->skb_queue_unreliable))
1180 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1181 skb_queue_purge(&local->skb_queue);
1182 skb_queue_purge(&local->skb_queue_unreliable);
1183
1184 destroy_workqueue(local->workqueue);
1185 wiphy_unregister(local->hw.wiphy);
1186 ieee80211_wep_free(local);
1187 ieee80211_led_exit(local);
1188 kfree(local->int_scan_req);
1189 }
1190 EXPORT_SYMBOL(ieee80211_unregister_hw);
1191
1192 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1193 {
1194 WARN_ONCE(1, "Have pending ack frames!\n");
1195 kfree_skb(p);
1196 return 0;
1197 }
1198
1199 void ieee80211_free_hw(struct ieee80211_hw *hw)
1200 {
1201 struct ieee80211_local *local = hw_to_local(hw);
1202
1203 mutex_destroy(&local->iflist_mtx);
1204 mutex_destroy(&local->mtx);
1205
1206 if (local->wiphy_ciphers_allocated)
1207 kfree(local->hw.wiphy->cipher_suites);
1208
1209 idr_for_each(&local->ack_status_frames,
1210 ieee80211_free_ack_frame, NULL);
1211 idr_destroy(&local->ack_status_frames);
1212
1213 sta_info_stop(local);
1214
1215 wiphy_free(local->hw.wiphy);
1216 }
1217 EXPORT_SYMBOL(ieee80211_free_hw);
1218
1219 static int __init ieee80211_init(void)
1220 {
1221 struct sk_buff *skb;
1222 int ret;
1223
1224 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1225 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1226 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1227
1228 ret = rc80211_minstrel_init();
1229 if (ret)
1230 return ret;
1231
1232 ret = rc80211_minstrel_ht_init();
1233 if (ret)
1234 goto err_minstrel;
1235
1236 ret = ieee80211_iface_init();
1237 if (ret)
1238 goto err_netdev;
1239
1240 return 0;
1241 err_netdev:
1242 rc80211_minstrel_ht_exit();
1243 err_minstrel:
1244 rc80211_minstrel_exit();
1245
1246 return ret;
1247 }
1248
1249 static void __exit ieee80211_exit(void)
1250 {
1251 rc80211_minstrel_ht_exit();
1252 rc80211_minstrel_exit();
1253
1254 ieee80211s_stop();
1255
1256 ieee80211_iface_exit();
1257
1258 rcu_barrier();
1259 }
1260
1261
1262 subsys_initcall(ieee80211_init);
1263 module_exit(ieee80211_exit);
1264
1265 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1266 MODULE_LICENSE("GPL");
Linux with added FPC-III support