]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/mac80211/main.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mac80211: Convert timers to use timer_setup()
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / main.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38 u64 mc;
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
41
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
44
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
51
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
54
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
57
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
60
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
63
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
66
67 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
69
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
72
73 /* be a bit nasty */
74 new_flags |= (1<<31);
75
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78 WARN_ON(new_flags & (1<<31));
79
80 local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
87
88 ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
95 u32 changed = 0;
96 int power;
97 u32 offchannel_flag;
98
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
107 } else
108 chandef = local->_oper_chandef;
109
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
114
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117 else
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127 }
128
129 if (!conf_is_ht(&local->hw.conf)) {
130 /*
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
134 */
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
139 }
140
141 power = ieee80211_chandef_max_power(&chandef);
142
143 rcu_read_lock();
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146 continue;
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148 continue;
149 power = min(power, sdata->vif.bss_conf.txpower);
150 }
151 rcu_read_unlock();
152
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
156 }
157
158 return changed;
159 }
160
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
162 {
163 int ret = 0;
164
165 might_sleep();
166
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
169 else
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
172
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
175 /*
176 * Goal:
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
179 *
180 * Current status:
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
183 * is enabled
184 *
185 * FIXME: integrate rfkill with mac80211 and then add this
186 * WARN_ON() back
187 *
188 */
189 /* WARN_ON(ret); */
190 }
191
192 return ret;
193 }
194
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
196 u32 changed)
197 {
198 struct ieee80211_local *local = sdata->local;
199
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
201 return;
202
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
204 }
205
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207 {
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
214 }
215
216 static void ieee80211_tasklet_handler(unsigned long data)
217 {
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
219 struct sk_buff *skb;
220
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
226 * netstack. */
227 skb->pkt_type = 0;
228 ieee80211_rx(&local->hw, skb);
229 break;
230 case IEEE80211_TX_STATUS_MSG:
231 skb->pkt_type = 0;
232 ieee80211_tx_status(&local->hw, skb);
233 break;
234 default:
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
236 skb->pkt_type);
237 dev_kfree_skb(skb);
238 break;
239 }
240 }
241 }
242
243 static void ieee80211_restart_work(struct work_struct *work)
244 {
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
248
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251 flush_work(&local->sched_scan_stopped_work);
252
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
255
256 flush_work(&local->radar_detected_work);
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
262 /* make sure any new ROC will consider local->in_reconfig */
263 flush_delayed_work(&local->roc_work);
264 flush_work(&local->hw_roc_done);
265
266 ieee80211_reconfig(local);
267 rtnl_unlock();
268 }
269
270 void ieee80211_restart_hw(struct ieee80211_hw *hw)
271 {
272 struct ieee80211_local *local = hw_to_local(hw);
273
274 trace_api_restart_hw(local);
275
276 wiphy_info(hw->wiphy,
277 "Hardware restart was requested\n");
278
279 /* use this reason, ieee80211_reconfig will unblock it */
280 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
281 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
282 false);
283
284 /*
285 * Stop all Rx during the reconfig. We don't want state changes
286 * or driver callbacks while this is in progress.
287 */
288 local->in_reconfig = true;
289 barrier();
290
291 queue_work(system_freezable_wq, &local->restart_work);
292 }
293 EXPORT_SYMBOL(ieee80211_restart_hw);
294
295 #ifdef CONFIG_INET
296 static int ieee80211_ifa_changed(struct notifier_block *nb,
297 unsigned long data, void *arg)
298 {
299 struct in_ifaddr *ifa = arg;
300 struct ieee80211_local *local =
301 container_of(nb, struct ieee80211_local,
302 ifa_notifier);
303 struct net_device *ndev = ifa->ifa_dev->dev;
304 struct wireless_dev *wdev = ndev->ieee80211_ptr;
305 struct in_device *idev;
306 struct ieee80211_sub_if_data *sdata;
307 struct ieee80211_bss_conf *bss_conf;
308 struct ieee80211_if_managed *ifmgd;
309 int c = 0;
310
311 /* Make sure it's our interface that got changed */
312 if (!wdev)
313 return NOTIFY_DONE;
314
315 if (wdev->wiphy != local->hw.wiphy)
316 return NOTIFY_DONE;
317
318 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
319 bss_conf = &sdata->vif.bss_conf;
320
321 /* ARP filtering is only supported in managed mode */
322 if (sdata->vif.type != NL80211_IFTYPE_STATION)
323 return NOTIFY_DONE;
324
325 idev = __in_dev_get_rtnl(sdata->dev);
326 if (!idev)
327 return NOTIFY_DONE;
328
329 ifmgd = &sdata->u.mgd;
330 sdata_lock(sdata);
331
332 /* Copy the addresses to the bss_conf list */
333 ifa = idev->ifa_list;
334 while (ifa) {
335 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
336 bss_conf->arp_addr_list[c] = ifa->ifa_address;
337 ifa = ifa->ifa_next;
338 c++;
339 }
340
341 bss_conf->arp_addr_cnt = c;
342
343 /* Configure driver only if associated (which also implies it is up) */
344 if (ifmgd->associated)
345 ieee80211_bss_info_change_notify(sdata,
346 BSS_CHANGED_ARP_FILTER);
347
348 sdata_unlock(sdata);
349
350 return NOTIFY_OK;
351 }
352 #endif
353
354 #if IS_ENABLED(CONFIG_IPV6)
355 static int ieee80211_ifa6_changed(struct notifier_block *nb,
356 unsigned long data, void *arg)
357 {
358 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
359 struct inet6_dev *idev = ifa->idev;
360 struct net_device *ndev = ifa->idev->dev;
361 struct ieee80211_local *local =
362 container_of(nb, struct ieee80211_local, ifa6_notifier);
363 struct wireless_dev *wdev = ndev->ieee80211_ptr;
364 struct ieee80211_sub_if_data *sdata;
365
366 /* Make sure it's our interface that got changed */
367 if (!wdev || wdev->wiphy != local->hw.wiphy)
368 return NOTIFY_DONE;
369
370 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
371
372 /*
373 * For now only support station mode. This is mostly because
374 * doing AP would have to handle AP_VLAN in some way ...
375 */
376 if (sdata->vif.type != NL80211_IFTYPE_STATION)
377 return NOTIFY_DONE;
378
379 drv_ipv6_addr_change(local, sdata, idev);
380
381 return NOTIFY_OK;
382 }
383 #endif
384
385 /* There isn't a lot of sense in it, but you can transmit anything you like */
386 static const struct ieee80211_txrx_stypes
387 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
388 [NL80211_IFTYPE_ADHOC] = {
389 .tx = 0xffff,
390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
391 BIT(IEEE80211_STYPE_AUTH >> 4) |
392 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394 },
395 [NL80211_IFTYPE_STATION] = {
396 .tx = 0xffff,
397 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
398 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
399 },
400 [NL80211_IFTYPE_AP] = {
401 .tx = 0xffff,
402 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
403 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
404 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
405 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
406 BIT(IEEE80211_STYPE_AUTH >> 4) |
407 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
408 BIT(IEEE80211_STYPE_ACTION >> 4),
409 },
410 [NL80211_IFTYPE_AP_VLAN] = {
411 /* copy AP */
412 .tx = 0xffff,
413 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
414 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
416 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
417 BIT(IEEE80211_STYPE_AUTH >> 4) |
418 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
419 BIT(IEEE80211_STYPE_ACTION >> 4),
420 },
421 [NL80211_IFTYPE_P2P_CLIENT] = {
422 .tx = 0xffff,
423 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
424 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
425 },
426 [NL80211_IFTYPE_P2P_GO] = {
427 .tx = 0xffff,
428 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
429 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
430 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
431 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
434 BIT(IEEE80211_STYPE_ACTION >> 4),
435 },
436 [NL80211_IFTYPE_MESH_POINT] = {
437 .tx = 0xffff,
438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439 BIT(IEEE80211_STYPE_AUTH >> 4) |
440 BIT(IEEE80211_STYPE_DEAUTH >> 4),
441 },
442 [NL80211_IFTYPE_P2P_DEVICE] = {
443 .tx = 0xffff,
444 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
446 },
447 };
448
449 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
450 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
451 IEEE80211_HT_AMPDU_PARM_DENSITY,
452
453 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
454 IEEE80211_HT_CAP_MAX_AMSDU |
455 IEEE80211_HT_CAP_SGI_20 |
456 IEEE80211_HT_CAP_SGI_40 |
457 IEEE80211_HT_CAP_LDPC_CODING |
458 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
459 .mcs = {
460 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
461 0xff, 0xff, 0xff, 0xff, 0xff, },
462 },
463 };
464
465 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
466 .vht_cap_info =
467 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
468 IEEE80211_VHT_CAP_SHORT_GI_80 |
469 IEEE80211_VHT_CAP_SHORT_GI_160 |
470 IEEE80211_VHT_CAP_RXSTBC_1 |
471 IEEE80211_VHT_CAP_RXSTBC_2 |
472 IEEE80211_VHT_CAP_RXSTBC_3 |
473 IEEE80211_VHT_CAP_RXSTBC_4 |
474 IEEE80211_VHT_CAP_TXSTBC |
475 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
476 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
477 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
478 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
479 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
480 .supp_mcs = {
481 .rx_mcs_map = cpu_to_le16(~0),
482 .tx_mcs_map = cpu_to_le16(~0),
483 },
484 };
485
486 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
487 const struct ieee80211_ops *ops,
488 const char *requested_name)
489 {
490 struct ieee80211_local *local;
491 int priv_size, i;
492 struct wiphy *wiphy;
493 bool use_chanctx;
494
495 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
496 !ops->add_interface || !ops->remove_interface ||
497 !ops->configure_filter))
498 return NULL;
499
500 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
501 return NULL;
502
503 /* check all or no channel context operations exist */
504 i = !!ops->add_chanctx + !!ops->remove_chanctx +
505 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
506 !!ops->unassign_vif_chanctx;
507 if (WARN_ON(i != 0 && i != 5))
508 return NULL;
509 use_chanctx = i == 5;
510
511 /* Ensure 32-byte alignment of our private data and hw private data.
512 * We use the wiphy priv data for both our ieee80211_local and for
513 * the driver's private data
514 *
515 * In memory it'll be like this:
516 *
517 * +-------------------------+
518 * | struct wiphy |
519 * +-------------------------+
520 * | struct ieee80211_local |
521 * +-------------------------+
522 * | driver's private data |
523 * +-------------------------+
524 *
525 */
526 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
527
528 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
529
530 if (!wiphy)
531 return NULL;
532
533 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
534
535 wiphy->privid = mac80211_wiphy_privid;
536
537 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
538 WIPHY_FLAG_4ADDR_AP |
539 WIPHY_FLAG_4ADDR_STATION |
540 WIPHY_FLAG_REPORTS_OBSS |
541 WIPHY_FLAG_OFFCHAN_TX;
542
543 if (ops->remain_on_channel)
544 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
545
546 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
547 NL80211_FEATURE_SAE |
548 NL80211_FEATURE_HT_IBSS |
549 NL80211_FEATURE_VIF_TXPOWER |
550 NL80211_FEATURE_MAC_ON_CREATE |
551 NL80211_FEATURE_USERSPACE_MPM |
552 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
553 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
554
555 if (!ops->hw_scan)
556 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
557 NL80211_FEATURE_AP_SCAN;
558
559
560 if (!ops->set_key)
561 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
562
563 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
564
565 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
566
567 local = wiphy_priv(wiphy);
568
569 if (sta_info_init(local))
570 goto err_free;
571
572 local->hw.wiphy = wiphy;
573
574 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
575
576 local->ops = ops;
577 local->use_chanctx = use_chanctx;
578
579 /* set up some defaults */
580 local->hw.queues = 1;
581 local->hw.max_rates = 1;
582 local->hw.max_report_rates = 0;
583 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
584 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
585 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
586 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
587 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
588 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
589 IEEE80211_RADIOTAP_MCS_HAVE_GI |
590 IEEE80211_RADIOTAP_MCS_HAVE_BW;
591 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
592 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
593 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
594 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
595 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
596 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
597 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
598
599 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
600
601 wiphy->extended_capabilities = local->ext_capa;
602 wiphy->extended_capabilities_mask = local->ext_capa;
603 wiphy->extended_capabilities_len =
604 ARRAY_SIZE(local->ext_capa);
605
606 INIT_LIST_HEAD(&local->interfaces);
607 INIT_LIST_HEAD(&local->mon_list);
608
609 __hw_addr_init(&local->mc_list);
610
611 mutex_init(&local->iflist_mtx);
612 mutex_init(&local->mtx);
613
614 mutex_init(&local->key_mtx);
615 spin_lock_init(&local->filter_lock);
616 spin_lock_init(&local->rx_path_lock);
617 spin_lock_init(&local->queue_stop_reason_lock);
618
619 INIT_LIST_HEAD(&local->chanctx_list);
620 mutex_init(&local->chanctx_mtx);
621
622 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
623
624 INIT_WORK(&local->restart_work, ieee80211_restart_work);
625
626 INIT_WORK(&local->radar_detected_work,
627 ieee80211_dfs_radar_detected_work);
628
629 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
630 local->smps_mode = IEEE80211_SMPS_OFF;
631
632 INIT_WORK(&local->dynamic_ps_enable_work,
633 ieee80211_dynamic_ps_enable_work);
634 INIT_WORK(&local->dynamic_ps_disable_work,
635 ieee80211_dynamic_ps_disable_work);
636 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
637
638 INIT_WORK(&local->sched_scan_stopped_work,
639 ieee80211_sched_scan_stopped_work);
640
641 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
642
643 spin_lock_init(&local->ack_status_lock);
644 idr_init(&local->ack_status_frames);
645
646 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
647 skb_queue_head_init(&local->pending[i]);
648 atomic_set(&local->agg_queue_stop[i], 0);
649 }
650 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
651 (unsigned long)local);
652
653 tasklet_init(&local->tasklet,
654 ieee80211_tasklet_handler,
655 (unsigned long) local);
656
657 skb_queue_head_init(&local->skb_queue);
658 skb_queue_head_init(&local->skb_queue_unreliable);
659 skb_queue_head_init(&local->skb_queue_tdls_chsw);
660
661 ieee80211_alloc_led_names(local);
662
663 ieee80211_roc_setup(local);
664
665 local->hw.radiotap_timestamp.units_pos = -1;
666 local->hw.radiotap_timestamp.accuracy = -1;
667
668 return &local->hw;
669 err_free:
670 wiphy_free(wiphy);
671 return NULL;
672 }
673 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
674
675 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
676 {
677 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
678 IS_ERR(local->wep_rx_tfm));
679 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
680 int n_suites = 0, r = 0, w = 0;
681 u32 *suites;
682 static const u32 cipher_suites[] = {
683 /* keep WEP first, it may be removed below */
684 WLAN_CIPHER_SUITE_WEP40,
685 WLAN_CIPHER_SUITE_WEP104,
686 WLAN_CIPHER_SUITE_TKIP,
687 WLAN_CIPHER_SUITE_CCMP,
688 WLAN_CIPHER_SUITE_CCMP_256,
689 WLAN_CIPHER_SUITE_GCMP,
690 WLAN_CIPHER_SUITE_GCMP_256,
691
692 /* keep last -- depends on hw flags! */
693 WLAN_CIPHER_SUITE_AES_CMAC,
694 WLAN_CIPHER_SUITE_BIP_CMAC_256,
695 WLAN_CIPHER_SUITE_BIP_GMAC_128,
696 WLAN_CIPHER_SUITE_BIP_GMAC_256,
697 };
698
699 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
700 local->hw.wiphy->cipher_suites) {
701 /* If the driver advertises, or doesn't support SW crypto,
702 * we only need to remove WEP if necessary.
703 */
704 if (have_wep)
705 return 0;
706
707 /* well if it has _no_ ciphers ... fine */
708 if (!local->hw.wiphy->n_cipher_suites)
709 return 0;
710
711 /* Driver provides cipher suites, but we need to exclude WEP */
712 suites = kmemdup(local->hw.wiphy->cipher_suites,
713 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
714 GFP_KERNEL);
715 if (!suites)
716 return -ENOMEM;
717
718 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
719 u32 suite = local->hw.wiphy->cipher_suites[r];
720
721 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
722 suite == WLAN_CIPHER_SUITE_WEP104)
723 continue;
724 suites[w++] = suite;
725 }
726 } else if (!local->hw.cipher_schemes) {
727 /* If the driver doesn't have cipher schemes, there's nothing
728 * else to do other than assign the (software supported and
729 * perhaps offloaded) cipher suites.
730 */
731 local->hw.wiphy->cipher_suites = cipher_suites;
732 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
733
734 if (!have_mfp)
735 local->hw.wiphy->n_cipher_suites -= 4;
736
737 if (!have_wep) {
738 local->hw.wiphy->cipher_suites += 2;
739 local->hw.wiphy->n_cipher_suites -= 2;
740 }
741
742 /* not dynamically allocated, so just return */
743 return 0;
744 } else {
745 const struct ieee80211_cipher_scheme *cs;
746
747 cs = local->hw.cipher_schemes;
748
749 /* Driver specifies cipher schemes only (but not cipher suites
750 * including the schemes)
751 *
752 * We start counting ciphers defined by schemes, TKIP, CCMP,
753 * CCMP-256, GCMP, and GCMP-256
754 */
755 n_suites = local->hw.n_cipher_schemes + 5;
756
757 /* check if we have WEP40 and WEP104 */
758 if (have_wep)
759 n_suites += 2;
760
761 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
762 * BIP-GMAC-256
763 */
764 if (have_mfp)
765 n_suites += 4;
766
767 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
768 if (!suites)
769 return -ENOMEM;
770
771 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
772 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
773 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
774 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
775 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
776
777 if (have_wep) {
778 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
779 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
780 }
781
782 if (have_mfp) {
783 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
784 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
785 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
786 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
787 }
788
789 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
790 suites[w++] = cs[r].cipher;
791 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
792 kfree(suites);
793 return -EINVAL;
794 }
795 }
796 }
797
798 local->hw.wiphy->cipher_suites = suites;
799 local->hw.wiphy->n_cipher_suites = w;
800 local->wiphy_ciphers_allocated = true;
801
802 return 0;
803 }
804
805 int ieee80211_register_hw(struct ieee80211_hw *hw)
806 {
807 struct ieee80211_local *local = hw_to_local(hw);
808 int result, i;
809 enum nl80211_band band;
810 int channels, max_bitrates;
811 bool supp_ht, supp_vht;
812 netdev_features_t feature_whitelist;
813 struct cfg80211_chan_def dflt_chandef = {};
814
815 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
816 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
817 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
818 return -EINVAL;
819
820 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
821 (!local->ops->tdls_channel_switch ||
822 !local->ops->tdls_cancel_channel_switch ||
823 !local->ops->tdls_recv_channel_switch))
824 return -EOPNOTSUPP;
825
826 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
827 !local->ops->set_frag_threshold))
828 return -EINVAL;
829
830 if (WARN_ON(local->hw.wiphy->interface_modes &
831 BIT(NL80211_IFTYPE_NAN) &&
832 (!local->ops->start_nan || !local->ops->stop_nan)))
833 return -EINVAL;
834
835 #ifdef CONFIG_PM
836 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
837 return -EINVAL;
838 #endif
839
840 if (!local->use_chanctx) {
841 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
842 const struct ieee80211_iface_combination *comb;
843
844 comb = &local->hw.wiphy->iface_combinations[i];
845
846 if (comb->num_different_channels > 1)
847 return -EINVAL;
848 }
849 } else {
850 /*
851 * WDS is currently prohibited when channel contexts are used
852 * because there's no clear definition of which channel WDS
853 * type interfaces use
854 */
855 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
856 return -EINVAL;
857
858 /* DFS is not supported with multi-channel combinations yet */
859 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
860 const struct ieee80211_iface_combination *comb;
861
862 comb = &local->hw.wiphy->iface_combinations[i];
863
864 if (comb->radar_detect_widths &&
865 comb->num_different_channels > 1)
866 return -EINVAL;
867 }
868 }
869
870 /* Only HW csum features are currently compatible with mac80211 */
871 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
872 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
873 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
874 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
875 return -EINVAL;
876
877 if (hw->max_report_rates == 0)
878 hw->max_report_rates = hw->max_rates;
879
880 local->rx_chains = 1;
881
882 /*
883 * generic code guarantees at least one band,
884 * set this very early because much code assumes
885 * that hw.conf.channel is assigned
886 */
887 channels = 0;
888 max_bitrates = 0;
889 supp_ht = false;
890 supp_vht = false;
891 for (band = 0; band < NUM_NL80211_BANDS; band++) {
892 struct ieee80211_supported_band *sband;
893
894 sband = local->hw.wiphy->bands[band];
895 if (!sband)
896 continue;
897
898 if (!dflt_chandef.chan) {
899 cfg80211_chandef_create(&dflt_chandef,
900 &sband->channels[0],
901 NL80211_CHAN_NO_HT);
902 /* init channel we're on */
903 if (!local->use_chanctx && !local->_oper_chandef.chan) {
904 local->hw.conf.chandef = dflt_chandef;
905 local->_oper_chandef = dflt_chandef;
906 }
907 local->monitor_chandef = dflt_chandef;
908 }
909
910 channels += sband->n_channels;
911
912 if (max_bitrates < sband->n_bitrates)
913 max_bitrates = sband->n_bitrates;
914 supp_ht = supp_ht || sband->ht_cap.ht_supported;
915 supp_vht = supp_vht || sband->vht_cap.vht_supported;
916
917 if (!sband->ht_cap.ht_supported)
918 continue;
919
920 /* TODO: consider VHT for RX chains, hopefully it's the same */
921 local->rx_chains =
922 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
923 local->rx_chains);
924
925 /* no need to mask, SM_PS_DISABLED has all bits set */
926 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
927 IEEE80211_HT_CAP_SM_PS_SHIFT;
928 }
929
930 /* if low-level driver supports AP, we also support VLAN */
931 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
932 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
933 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
934 }
935
936 /* mac80211 always supports monitor */
937 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
938 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
939
940 /* mac80211 doesn't support more than one IBSS interface right now */
941 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
942 const struct ieee80211_iface_combination *c;
943 int j;
944
945 c = &hw->wiphy->iface_combinations[i];
946
947 for (j = 0; j < c->n_limits; j++)
948 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
949 c->limits[j].max > 1)
950 return -EINVAL;
951 }
952
953 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
954 sizeof(void *) * channels, GFP_KERNEL);
955 if (!local->int_scan_req)
956 return -ENOMEM;
957
958 for (band = 0; band < NUM_NL80211_BANDS; band++) {
959 if (!local->hw.wiphy->bands[band])
960 continue;
961 local->int_scan_req->rates[band] = (u32) -1;
962 }
963
964 #ifndef CONFIG_MAC80211_MESH
965 /* mesh depends on Kconfig, but drivers should set it if they want */
966 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
967 #endif
968
969 /* if the underlying driver supports mesh, mac80211 will (at least)
970 * provide routing of mesh authentication frames to userspace */
971 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
972 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
973
974 /* mac80211 supports control port protocol changing */
975 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
976
977 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
978 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
979 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
980 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
981 if (hw->max_signal <= 0) {
982 result = -EINVAL;
983 goto fail_wiphy_register;
984 }
985 }
986
987 /*
988 * Calculate scan IE length -- we need this to alloc
989 * memory and to subtract from the driver limit. It
990 * includes the DS Params, (extended) supported rates, and HT
991 * information -- SSID is the driver's responsibility.
992 */
993 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
994 3 /* DS Params */;
995 if (supp_ht)
996 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
997
998 if (supp_vht)
999 local->scan_ies_len +=
1000 2 + sizeof(struct ieee80211_vht_cap);
1001
1002 if (!local->ops->hw_scan) {
1003 /* For hw_scan, driver needs to set these up. */
1004 local->hw.wiphy->max_scan_ssids = 4;
1005 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1006 }
1007
1008 /*
1009 * If the driver supports any scan IEs, then assume the
1010 * limit includes the IEs mac80211 will add, otherwise
1011 * leave it at zero and let the driver sort it out; we
1012 * still pass our IEs to the driver but userspace will
1013 * not be allowed to in that case.
1014 */
1015 if (local->hw.wiphy->max_scan_ie_len)
1016 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1017
1018 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1019 local->hw.n_cipher_schemes));
1020
1021 result = ieee80211_init_cipher_suites(local);
1022 if (result < 0)
1023 goto fail_wiphy_register;
1024
1025 if (!local->ops->remain_on_channel)
1026 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1027
1028 /* mac80211 based drivers don't support internal TDLS setup */
1029 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1030 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1031
1032 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1033 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1034 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1035
1036 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1037
1038 result = wiphy_register(local->hw.wiphy);
1039 if (result < 0)
1040 goto fail_wiphy_register;
1041
1042 /*
1043 * We use the number of queues for feature tests (QoS, HT) internally
1044 * so restrict them appropriately.
1045 */
1046 if (hw->queues > IEEE80211_MAX_QUEUES)
1047 hw->queues = IEEE80211_MAX_QUEUES;
1048
1049 local->workqueue =
1050 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1051 if (!local->workqueue) {
1052 result = -ENOMEM;
1053 goto fail_workqueue;
1054 }
1055
1056 /*
1057 * The hardware needs headroom for sending the frame,
1058 * and we need some headroom for passing the frame to monitor
1059 * interfaces, but never both at the same time.
1060 */
1061 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1062 IEEE80211_TX_STATUS_HEADROOM);
1063
1064 debugfs_hw_add(local);
1065
1066 /*
1067 * if the driver doesn't specify a max listen interval we
1068 * use 5 which should be a safe default
1069 */
1070 if (local->hw.max_listen_interval == 0)
1071 local->hw.max_listen_interval = 5;
1072
1073 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1074
1075 local->dynamic_ps_forced_timeout = -1;
1076
1077 if (!local->hw.max_nan_de_entries)
1078 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1079
1080 result = ieee80211_wep_init(local);
1081 if (result < 0)
1082 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1083 result);
1084
1085 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1086
1087 ieee80211_led_init(local);
1088
1089 rtnl_lock();
1090
1091 result = ieee80211_init_rate_ctrl_alg(local,
1092 hw->rate_control_algorithm);
1093 if (result < 0) {
1094 wiphy_debug(local->hw.wiphy,
1095 "Failed to initialize rate control algorithm\n");
1096 goto fail_rate;
1097 }
1098
1099 /* add one default STA interface if supported */
1100 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1101 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1102 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1103 NL80211_IFTYPE_STATION, NULL);
1104 if (result)
1105 wiphy_warn(local->hw.wiphy,
1106 "Failed to add default virtual iface\n");
1107 }
1108
1109 rtnl_unlock();
1110
1111 result = ieee80211_txq_setup_flows(local);
1112 if (result)
1113 goto fail_flows;
1114
1115 #ifdef CONFIG_INET
1116 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1117 result = register_inetaddr_notifier(&local->ifa_notifier);
1118 if (result)
1119 goto fail_ifa;
1120 #endif
1121
1122 #if IS_ENABLED(CONFIG_IPV6)
1123 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1124 result = register_inet6addr_notifier(&local->ifa6_notifier);
1125 if (result)
1126 goto fail_ifa6;
1127 #endif
1128
1129 return 0;
1130
1131 #if IS_ENABLED(CONFIG_IPV6)
1132 fail_ifa6:
1133 #ifdef CONFIG_INET
1134 unregister_inetaddr_notifier(&local->ifa_notifier);
1135 #endif
1136 #endif
1137 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1138 fail_ifa:
1139 #endif
1140 ieee80211_txq_teardown_flows(local);
1141 fail_flows:
1142 rtnl_lock();
1143 rate_control_deinitialize(local);
1144 ieee80211_remove_interfaces(local);
1145 fail_rate:
1146 rtnl_unlock();
1147 ieee80211_led_exit(local);
1148 ieee80211_wep_free(local);
1149 destroy_workqueue(local->workqueue);
1150 fail_workqueue:
1151 wiphy_unregister(local->hw.wiphy);
1152 fail_wiphy_register:
1153 if (local->wiphy_ciphers_allocated)
1154 kfree(local->hw.wiphy->cipher_suites);
1155 kfree(local->int_scan_req);
1156 return result;
1157 }
1158 EXPORT_SYMBOL(ieee80211_register_hw);
1159
1160 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1161 {
1162 struct ieee80211_local *local = hw_to_local(hw);
1163
1164 tasklet_kill(&local->tx_pending_tasklet);
1165 tasklet_kill(&local->tasklet);
1166
1167 #ifdef CONFIG_INET
1168 unregister_inetaddr_notifier(&local->ifa_notifier);
1169 #endif
1170 #if IS_ENABLED(CONFIG_IPV6)
1171 unregister_inet6addr_notifier(&local->ifa6_notifier);
1172 #endif
1173
1174 rtnl_lock();
1175
1176 /*
1177 * At this point, interface list manipulations are fine
1178 * because the driver cannot be handing us frames any
1179 * more and the tasklet is killed.
1180 */
1181 ieee80211_remove_interfaces(local);
1182
1183 rtnl_unlock();
1184
1185 cancel_delayed_work_sync(&local->roc_work);
1186 cancel_work_sync(&local->restart_work);
1187 cancel_work_sync(&local->reconfig_filter);
1188 cancel_work_sync(&local->tdls_chsw_work);
1189 flush_work(&local->sched_scan_stopped_work);
1190 flush_work(&local->radar_detected_work);
1191
1192 ieee80211_clear_tx_pending(local);
1193 rate_control_deinitialize(local);
1194
1195 if (skb_queue_len(&local->skb_queue) ||
1196 skb_queue_len(&local->skb_queue_unreliable))
1197 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1198 skb_queue_purge(&local->skb_queue);
1199 skb_queue_purge(&local->skb_queue_unreliable);
1200 skb_queue_purge(&local->skb_queue_tdls_chsw);
1201 ieee80211_txq_teardown_flows(local);
1202
1203 destroy_workqueue(local->workqueue);
1204 wiphy_unregister(local->hw.wiphy);
1205 ieee80211_wep_free(local);
1206 ieee80211_led_exit(local);
1207 kfree(local->int_scan_req);
1208 }
1209 EXPORT_SYMBOL(ieee80211_unregister_hw);
1210
1211 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1212 {
1213 WARN_ONCE(1, "Have pending ack frames!\n");
1214 kfree_skb(p);
1215 return 0;
1216 }
1217
1218 void ieee80211_free_hw(struct ieee80211_hw *hw)
1219 {
1220 struct ieee80211_local *local = hw_to_local(hw);
1221
1222 mutex_destroy(&local->iflist_mtx);
1223 mutex_destroy(&local->mtx);
1224
1225 if (local->wiphy_ciphers_allocated)
1226 kfree(local->hw.wiphy->cipher_suites);
1227
1228 idr_for_each(&local->ack_status_frames,
1229 ieee80211_free_ack_frame, NULL);
1230 idr_destroy(&local->ack_status_frames);
1231
1232 sta_info_stop(local);
1233
1234 ieee80211_free_led_names(local);
1235
1236 wiphy_free(local->hw.wiphy);
1237 }
1238 EXPORT_SYMBOL(ieee80211_free_hw);
1239
1240 static int __init ieee80211_init(void)
1241 {
1242 struct sk_buff *skb;
1243 int ret;
1244
1245 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1246 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1247 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1248
1249 ret = rc80211_minstrel_init();
1250 if (ret)
1251 return ret;
1252
1253 ret = rc80211_minstrel_ht_init();
1254 if (ret)
1255 goto err_minstrel;
1256
1257 ret = ieee80211_iface_init();
1258 if (ret)
1259 goto err_netdev;
1260
1261 return 0;
1262 err_netdev:
1263 rc80211_minstrel_ht_exit();
1264 err_minstrel:
1265 rc80211_minstrel_exit();
1266
1267 return ret;
1268 }
1269
1270 static void __exit ieee80211_exit(void)
1271 {
1272 rc80211_minstrel_ht_exit();
1273 rc80211_minstrel_exit();
1274
1275 ieee80211s_stop();
1276
1277 ieee80211_iface_exit();
1278
1279 rcu_barrier();
1280 }
1281
1282
1283 subsys_initcall(ieee80211_init);
1284 module_exit(ieee80211_exit);
1285
1286 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1287 MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror