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smack: SMACK_MAGIC to include/uapi/linux/magic.h
[linux/fpc-iii.git] / net / mac80211 / main.c
blob1a8591b77a13d1ff1e41a67f6c8ed8c57daa83e9
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 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.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 "cfg.h"
35 #include "debugfs.h"
36
37 void ieee80211_configure_filter(struct ieee80211_local *local)
38 {
39 u64 mc;
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
42
43 if (atomic_read(&local->iff_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
45
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
48
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
52
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
55
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
58
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
61
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
64
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
67
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
87 static void ieee80211_reconfig_filter(struct work_struct *work)
88 {
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
91
92 ieee80211_configure_filter(local);
93 }
94
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
96 {
97 struct ieee80211_sub_if_data *sdata;
98 struct ieee80211_channel *chan;
99 u32 changed = 0;
100 int power;
101 enum nl80211_channel_type channel_type;
102 u32 offchannel_flag;
103 bool scanning = false;
104
105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
106 if (local->scan_channel) {
107 chan = local->scan_channel;
108 /* If scanning on oper channel, use whatever channel-type
109 * is currently in use.
110 */
111 if (chan == local->_oper_channel)
112 channel_type = local->_oper_channel_type;
113 else
114 channel_type = NL80211_CHAN_NO_HT;
115 } else if (local->tmp_channel) {
116 chan = local->tmp_channel;
117 channel_type = NL80211_CHAN_NO_HT;
118 } else {
119 chan = local->_oper_channel;
120 channel_type = local->_oper_channel_type;
121 }
122
123 if (chan != local->_oper_channel ||
124 channel_type != local->_oper_channel_type)
125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
126 else
127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
128
129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
130
131 if (offchannel_flag || chan != local->hw.conf.channel ||
132 channel_type != local->hw.conf.channel_type) {
133 local->hw.conf.channel = chan;
134 local->hw.conf.channel_type = channel_type;
135 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
136 }
137
138 if (!conf_is_ht(&local->hw.conf)) {
139 /*
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
143 */
144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
145 } else if (local->hw.conf.smps_mode != local->smps_mode) {
146 local->hw.conf.smps_mode = local->smps_mode;
147 changed |= IEEE80211_CONF_CHANGE_SMPS;
148 }
149
150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
152 test_bit(SCAN_HW_SCANNING, &local->scanning);
153 power = chan->max_power;
154
155 rcu_read_lock();
156 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
157 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
158 continue;
159 power = min(power, sdata->vif.bss_conf.txpower);
160 }
161 rcu_read_unlock();
162
163 if (local->hw.conf.power_level != power) {
164 changed |= IEEE80211_CONF_CHANGE_POWER;
165 local->hw.conf.power_level = power;
166 }
167
168 return changed;
169 }
170
171 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
172 {
173 int ret = 0;
174
175 might_sleep();
176
177 if (!local->use_chanctx)
178 changed |= ieee80211_hw_conf_chan(local);
179 else
180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
181 IEEE80211_CONF_CHANGE_POWER);
182
183 if (changed && local->open_count) {
184 ret = drv_config(local, changed);
185 /*
186 * Goal:
187 * HW reconfiguration should never fail, the driver has told
188 * us what it can support so it should live up to that promise.
189 *
190 * Current status:
191 * rfkill is not integrated with mac80211 and a
192 * configuration command can thus fail if hardware rfkill
193 * is enabled
194 *
195 * FIXME: integrate rfkill with mac80211 and then add this
196 * WARN_ON() back
197 *
198 */
199 /* WARN_ON(ret); */
200 }
201
202 return ret;
203 }
204
205 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
206 u32 changed)
207 {
208 struct ieee80211_local *local = sdata->local;
209
210 if (!changed)
211 return;
212
213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
214 }
215
216 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
217 {
218 sdata->vif.bss_conf.use_cts_prot = false;
219 sdata->vif.bss_conf.use_short_preamble = false;
220 sdata->vif.bss_conf.use_short_slot = false;
221 return BSS_CHANGED_ERP_CTS_PROT |
222 BSS_CHANGED_ERP_PREAMBLE |
223 BSS_CHANGED_ERP_SLOT;
224 }
225
226 static void ieee80211_tasklet_handler(unsigned long data)
227 {
228 struct ieee80211_local *local = (struct ieee80211_local *) data;
229 struct sta_info *sta, *tmp;
230 struct skb_eosp_msg_data *eosp_data;
231 struct sk_buff *skb;
232
233 while ((skb = skb_dequeue(&local->skb_queue)) ||
234 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
235 switch (skb->pkt_type) {
236 case IEEE80211_RX_MSG:
237 /* Clear skb->pkt_type in order to not confuse kernel
238 * netstack. */
239 skb->pkt_type = 0;
240 ieee80211_rx(&local->hw, skb);
241 break;
242 case IEEE80211_TX_STATUS_MSG:
243 skb->pkt_type = 0;
244 ieee80211_tx_status(&local->hw, skb);
245 break;
246 case IEEE80211_EOSP_MSG:
247 eosp_data = (void *)skb->cb;
248 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
249 /* skip wrong virtual interface */
250 if (memcmp(eosp_data->iface,
251 sta->sdata->vif.addr, ETH_ALEN))
252 continue;
253 clear_sta_flag(sta, WLAN_STA_SP);
254 break;
255 }
256 dev_kfree_skb(skb);
257 break;
258 default:
259 WARN(1, "mac80211: Packet is of unknown type %d\n",
260 skb->pkt_type);
261 dev_kfree_skb(skb);
262 break;
263 }
264 }
265 }
266
267 static void ieee80211_restart_work(struct work_struct *work)
268 {
269 struct ieee80211_local *local =
270 container_of(work, struct ieee80211_local, restart_work);
271
272 /* wait for scan work complete */
273 flush_workqueue(local->workqueue);
274
275 mutex_lock(&local->mtx);
276 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
277 rcu_dereference_protected(local->sched_scan_sdata,
278 lockdep_is_held(&local->mtx)),
279 "%s called with hardware scan in progress\n", __func__);
280 mutex_unlock(&local->mtx);
281
282 rtnl_lock();
283 ieee80211_scan_cancel(local);
284 ieee80211_reconfig(local);
285 rtnl_unlock();
286 }
287
288 void ieee80211_restart_hw(struct ieee80211_hw *hw)
289 {
290 struct ieee80211_local *local = hw_to_local(hw);
291
292 trace_api_restart_hw(local);
293
294 wiphy_info(hw->wiphy,
295 "Hardware restart was requested\n");
296
297 /* use this reason, ieee80211_reconfig will unblock it */
298 ieee80211_stop_queues_by_reason(hw,
299 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
300
301 /*
302 * Stop all Rx during the reconfig. We don't want state changes
303 * or driver callbacks while this is in progress.
304 */
305 local->in_reconfig = true;
306 barrier();
307
308 schedule_work(&local->restart_work);
309 }
310 EXPORT_SYMBOL(ieee80211_restart_hw);
311
312 #ifdef CONFIG_INET
313 static int ieee80211_ifa_changed(struct notifier_block *nb,
314 unsigned long data, void *arg)
315 {
316 struct in_ifaddr *ifa = arg;
317 struct ieee80211_local *local =
318 container_of(nb, struct ieee80211_local,
319 ifa_notifier);
320 struct net_device *ndev = ifa->ifa_dev->dev;
321 struct wireless_dev *wdev = ndev->ieee80211_ptr;
322 struct in_device *idev;
323 struct ieee80211_sub_if_data *sdata;
324 struct ieee80211_bss_conf *bss_conf;
325 struct ieee80211_if_managed *ifmgd;
326 int c = 0;
327
328 /* Make sure it's our interface that got changed */
329 if (!wdev)
330 return NOTIFY_DONE;
331
332 if (wdev->wiphy != local->hw.wiphy)
333 return NOTIFY_DONE;
334
335 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
336 bss_conf = &sdata->vif.bss_conf;
337
338 /* ARP filtering is only supported in managed mode */
339 if (sdata->vif.type != NL80211_IFTYPE_STATION)
340 return NOTIFY_DONE;
341
342 idev = __in_dev_get_rtnl(sdata->dev);
343 if (!idev)
344 return NOTIFY_DONE;
345
346 ifmgd = &sdata->u.mgd;
347 mutex_lock(&ifmgd->mtx);
348
349 /* Copy the addresses to the bss_conf list */
350 ifa = idev->ifa_list;
351 while (ifa) {
352 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
353 bss_conf->arp_addr_list[c] = ifa->ifa_address;
354 ifa = ifa->ifa_next;
355 c++;
356 }
357
358 bss_conf->arp_addr_cnt = c;
359
360 /* Configure driver only if associated (which also implies it is up) */
361 if (ifmgd->associated)
362 ieee80211_bss_info_change_notify(sdata,
363 BSS_CHANGED_ARP_FILTER);
364
365 mutex_unlock(&ifmgd->mtx);
366
367 return NOTIFY_DONE;
368 }
369 #endif
370
371 #if IS_ENABLED(CONFIG_IPV6)
372 static int ieee80211_ifa6_changed(struct notifier_block *nb,
373 unsigned long data, void *arg)
374 {
375 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
376 struct inet6_dev *idev = ifa->idev;
377 struct net_device *ndev = ifa->idev->dev;
378 struct ieee80211_local *local =
379 container_of(nb, struct ieee80211_local, ifa6_notifier);
380 struct wireless_dev *wdev = ndev->ieee80211_ptr;
381 struct ieee80211_sub_if_data *sdata;
382
383 /* Make sure it's our interface that got changed */
384 if (!wdev || wdev->wiphy != local->hw.wiphy)
385 return NOTIFY_DONE;
386
387 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
388
389 /*
390 * For now only support station mode. This is mostly because
391 * doing AP would have to handle AP_VLAN in some way ...
392 */
393 if (sdata->vif.type != NL80211_IFTYPE_STATION)
394 return NOTIFY_DONE;
395
396 drv_ipv6_addr_change(local, sdata, idev);
397
398 return NOTIFY_DONE;
399 }
400 #endif
401
402 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
403 {
404 struct ieee80211_local *local =
405 container_of(napi, struct ieee80211_local, napi);
406
407 return local->ops->napi_poll(&local->hw, budget);
408 }
409
410 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
411 {
412 struct ieee80211_local *local = hw_to_local(hw);
413
414 napi_schedule(&local->napi);
415 }
416 EXPORT_SYMBOL(ieee80211_napi_schedule);
417
418 void ieee80211_napi_complete(struct ieee80211_hw *hw)
419 {
420 struct ieee80211_local *local = hw_to_local(hw);
421
422 napi_complete(&local->napi);
423 }
424 EXPORT_SYMBOL(ieee80211_napi_complete);
425
426 /* There isn't a lot of sense in it, but you can transmit anything you like */
427 static const struct ieee80211_txrx_stypes
428 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
429 [NL80211_IFTYPE_ADHOC] = {
430 .tx = 0xffff,
431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
434 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
435 },
436 [NL80211_IFTYPE_STATION] = {
437 .tx = 0xffff,
438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
440 },
441 [NL80211_IFTYPE_AP] = {
442 .tx = 0xffff,
443 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
444 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
446 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
447 BIT(IEEE80211_STYPE_AUTH >> 4) |
448 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
449 BIT(IEEE80211_STYPE_ACTION >> 4),
450 },
451 [NL80211_IFTYPE_AP_VLAN] = {
452 /* copy AP */
453 .tx = 0xffff,
454 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
455 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
457 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
458 BIT(IEEE80211_STYPE_AUTH >> 4) |
459 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
460 BIT(IEEE80211_STYPE_ACTION >> 4),
461 },
462 [NL80211_IFTYPE_P2P_CLIENT] = {
463 .tx = 0xffff,
464 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
465 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
466 },
467 [NL80211_IFTYPE_P2P_GO] = {
468 .tx = 0xffff,
469 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
470 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
472 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
473 BIT(IEEE80211_STYPE_AUTH >> 4) |
474 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
475 BIT(IEEE80211_STYPE_ACTION >> 4),
476 },
477 [NL80211_IFTYPE_MESH_POINT] = {
478 .tx = 0xffff,
479 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
480 BIT(IEEE80211_STYPE_AUTH >> 4) |
481 BIT(IEEE80211_STYPE_DEAUTH >> 4),
482 },
483 [NL80211_IFTYPE_P2P_DEVICE] = {
484 .tx = 0xffff,
485 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
486 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
487 },
488 };
489
490 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
491 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
492 IEEE80211_HT_AMPDU_PARM_DENSITY,
493
494 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
495 IEEE80211_HT_CAP_MAX_AMSDU |
496 IEEE80211_HT_CAP_SGI_20 |
497 IEEE80211_HT_CAP_SGI_40),
498 .mcs = {
499 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
500 0xff, 0xff, 0xff, 0xff, 0xff, },
501 },
502 };
503
504 static const u8 extended_capabilities[] = {
505 0, 0, 0, 0, 0, 0, 0,
506 WLAN_EXT_CAPA8_OPMODE_NOTIF,
507 };
508
509 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
510 const struct ieee80211_ops *ops)
511 {
512 struct ieee80211_local *local;
513 int priv_size, i;
514 struct wiphy *wiphy;
515 bool use_chanctx;
516
517 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
518 !ops->add_interface || !ops->remove_interface ||
519 !ops->configure_filter))
520 return NULL;
521
522 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
523 return NULL;
524
525 /* check all or no channel context operations exist */
526 i = !!ops->add_chanctx + !!ops->remove_chanctx +
527 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
528 !!ops->unassign_vif_chanctx;
529 if (WARN_ON(i != 0 && i != 5))
530 return NULL;
531 use_chanctx = i == 5;
532
533 /* Ensure 32-byte alignment of our private data and hw private data.
534 * We use the wiphy priv data for both our ieee80211_local and for
535 * the driver's private data
536 *
537 * In memory it'll be like this:
538 *
539 * +-------------------------+
540 * | struct wiphy |
541 * +-------------------------+
542 * | struct ieee80211_local |
543 * +-------------------------+
544 * | driver's private data |
545 * +-------------------------+
546 *
547 */
548 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
549
550 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
551
552 if (!wiphy)
553 return NULL;
554
555 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
556
557 wiphy->privid = mac80211_wiphy_privid;
558
559 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
560 WIPHY_FLAG_4ADDR_AP |
561 WIPHY_FLAG_4ADDR_STATION |
562 WIPHY_FLAG_REPORTS_OBSS |
563 WIPHY_FLAG_OFFCHAN_TX;
564
565 wiphy->extended_capabilities = extended_capabilities;
566 wiphy->extended_capabilities_mask = extended_capabilities;
567 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
568
569 if (ops->remain_on_channel)
570 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
571
572 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
573 NL80211_FEATURE_SAE |
574 NL80211_FEATURE_HT_IBSS |
575 NL80211_FEATURE_VIF_TXPOWER;
576
577 if (!ops->hw_scan)
578 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
579 NL80211_FEATURE_AP_SCAN;
580
581
582 if (!ops->set_key)
583 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
584
585 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
586
587 local = wiphy_priv(wiphy);
588
589 local->hw.wiphy = wiphy;
590
591 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
592
593 local->ops = ops;
594 local->use_chanctx = use_chanctx;
595
596 /* set up some defaults */
597 local->hw.queues = 1;
598 local->hw.max_rates = 1;
599 local->hw.max_report_rates = 0;
600 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
601 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
602 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
603 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
604 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
605 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
606 IEEE80211_RADIOTAP_MCS_HAVE_GI |
607 IEEE80211_RADIOTAP_MCS_HAVE_BW;
608 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
609 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
610 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
611 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
612
613 INIT_LIST_HEAD(&local->interfaces);
614
615 __hw_addr_init(&local->mc_list);
616
617 mutex_init(&local->iflist_mtx);
618 mutex_init(&local->mtx);
619
620 mutex_init(&local->key_mtx);
621 spin_lock_init(&local->filter_lock);
622 spin_lock_init(&local->rx_path_lock);
623 spin_lock_init(&local->queue_stop_reason_lock);
624
625 INIT_LIST_HEAD(&local->chanctx_list);
626 mutex_init(&local->chanctx_mtx);
627
628 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
629
630 INIT_WORK(&local->restart_work, ieee80211_restart_work);
631
632 INIT_WORK(&local->radar_detected_work,
633 ieee80211_dfs_radar_detected_work);
634
635 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
636 local->smps_mode = IEEE80211_SMPS_OFF;
637
638 INIT_WORK(&local->dynamic_ps_enable_work,
639 ieee80211_dynamic_ps_enable_work);
640 INIT_WORK(&local->dynamic_ps_disable_work,
641 ieee80211_dynamic_ps_disable_work);
642 setup_timer(&local->dynamic_ps_timer,
643 ieee80211_dynamic_ps_timer, (unsigned long) local);
644
645 INIT_WORK(&local->sched_scan_stopped_work,
646 ieee80211_sched_scan_stopped_work);
647
648 spin_lock_init(&local->ack_status_lock);
649 idr_init(&local->ack_status_frames);
650
651 sta_info_init(local);
652
653 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
654 skb_queue_head_init(&local->pending[i]);
655 atomic_set(&local->agg_queue_stop[i], 0);
656 }
657 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
658 (unsigned long)local);
659
660 tasklet_init(&local->tasklet,
661 ieee80211_tasklet_handler,
662 (unsigned long) local);
663
664 skb_queue_head_init(&local->skb_queue);
665 skb_queue_head_init(&local->skb_queue_unreliable);
666
667 /* init dummy netdev for use w/ NAPI */
668 init_dummy_netdev(&local->napi_dev);
669
670 ieee80211_led_names(local);
671
672 ieee80211_roc_setup(local);
673
674 return &local->hw;
675 }
676 EXPORT_SYMBOL(ieee80211_alloc_hw);
677
678 int ieee80211_register_hw(struct ieee80211_hw *hw)
679 {
680 struct ieee80211_local *local = hw_to_local(hw);
681 int result, i;
682 enum ieee80211_band band;
683 int channels, max_bitrates;
684 bool supp_ht, supp_vht;
685 netdev_features_t feature_whitelist;
686 static const u32 cipher_suites[] = {
687 /* keep WEP first, it may be removed below */
688 WLAN_CIPHER_SUITE_WEP40,
689 WLAN_CIPHER_SUITE_WEP104,
690 WLAN_CIPHER_SUITE_TKIP,
691 WLAN_CIPHER_SUITE_CCMP,
692
693 /* keep last -- depends on hw flags! */
694 WLAN_CIPHER_SUITE_AES_CMAC
695 };
696
697 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
698 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
699 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
700 return -EINVAL;
701
702 #ifdef CONFIG_PM
703 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
704 (!local->ops->suspend || !local->ops->resume))
705 return -EINVAL;
706 #endif
707
708 if (!local->use_chanctx) {
709 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
710 const struct ieee80211_iface_combination *comb;
711
712 comb = &local->hw.wiphy->iface_combinations[i];
713
714 if (comb->num_different_channels > 1)
715 return -EINVAL;
716 }
717 } else {
718 /*
719 * WDS is currently prohibited when channel contexts are used
720 * because there's no clear definition of which channel WDS
721 * type interfaces use
722 */
723 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
724 return -EINVAL;
725
726 /* DFS currently not supported with channel context drivers */
727 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
728 const struct ieee80211_iface_combination *comb;
729
730 comb = &local->hw.wiphy->iface_combinations[i];
731
732 if (comb->radar_detect_widths)
733 return -EINVAL;
734 }
735 }
736
737 /* Only HW csum features are currently compatible with mac80211 */
738 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
739 NETIF_F_HW_CSUM;
740 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
741 return -EINVAL;
742
743 if (hw->max_report_rates == 0)
744 hw->max_report_rates = hw->max_rates;
745
746 local->rx_chains = 1;
747
748 /*
749 * generic code guarantees at least one band,
750 * set this very early because much code assumes
751 * that hw.conf.channel is assigned
752 */
753 channels = 0;
754 max_bitrates = 0;
755 supp_ht = false;
756 supp_vht = false;
757 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
758 struct ieee80211_supported_band *sband;
759
760 sband = local->hw.wiphy->bands[band];
761 if (!sband)
762 continue;
763 if (!local->use_chanctx && !local->_oper_channel) {
764 /* init channel we're on */
765 local->hw.conf.channel =
766 local->_oper_channel = &sband->channels[0];
767 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
768 }
769 cfg80211_chandef_create(&local->monitor_chandef,
770 &sband->channels[0],
771 NL80211_CHAN_NO_HT);
772 channels += sband->n_channels;
773
774 if (max_bitrates < sband->n_bitrates)
775 max_bitrates = sband->n_bitrates;
776 supp_ht = supp_ht || sband->ht_cap.ht_supported;
777 supp_vht = supp_vht || sband->vht_cap.vht_supported;
778
779 if (sband->ht_cap.ht_supported)
780 local->rx_chains =
781 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
782 local->rx_chains);
783
784 /* TODO: consider VHT for RX chains, hopefully it's the same */
785 }
786
787 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
788 sizeof(void *) * channels, GFP_KERNEL);
789 if (!local->int_scan_req)
790 return -ENOMEM;
791
792 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
793 if (!local->hw.wiphy->bands[band])
794 continue;
795 local->int_scan_req->rates[band] = (u32) -1;
796 }
797
798 /* if low-level driver supports AP, we also support VLAN */
799 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
800 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
801 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
802 }
803
804 /* mac80211 always supports monitor */
805 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
806 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
807
808 /* mac80211 doesn't support more than one IBSS interface right now */
809 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
810 const struct ieee80211_iface_combination *c;
811 int j;
812
813 c = &hw->wiphy->iface_combinations[i];
814
815 for (j = 0; j < c->n_limits; j++)
816 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
817 c->limits[j].max > 1)
818 return -EINVAL;
819 }
820
821 #ifndef CONFIG_MAC80211_MESH
822 /* mesh depends on Kconfig, but drivers should set it if they want */
823 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
824 #endif
825
826 /* if the underlying driver supports mesh, mac80211 will (at least)
827 * provide routing of mesh authentication frames to userspace */
828 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
829 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
830
831 /* mac80211 supports control port protocol changing */
832 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
833
834 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
835 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
836 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
837 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
838
839 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
840 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
841 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
842
843 /*
844 * Calculate scan IE length -- we need this to alloc
845 * memory and to subtract from the driver limit. It
846 * includes the DS Params, (extended) supported rates, and HT
847 * information -- SSID is the driver's responsibility.
848 */
849 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
850 3 /* DS Params */;
851 if (supp_ht)
852 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
853
854 if (supp_vht) {
855 local->scan_ies_len +=
856 2 + sizeof(struct ieee80211_vht_cap);
857
858 /*
859 * (for now at least), drivers wanting to use VHT must
860 * support channel contexts, as they contain all the
861 * necessary VHT information and the global hw config
862 * doesn't (yet)
863 */
864 if (WARN_ON(!local->use_chanctx)) {
865 result = -EINVAL;
866 goto fail_wiphy_register;
867 }
868 }
869
870 if (!local->ops->hw_scan) {
871 /* For hw_scan, driver needs to set these up. */
872 local->hw.wiphy->max_scan_ssids = 4;
873 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
874 }
875
876 /*
877 * If the driver supports any scan IEs, then assume the
878 * limit includes the IEs mac80211 will add, otherwise
879 * leave it at zero and let the driver sort it out; we
880 * still pass our IEs to the driver but userspace will
881 * not be allowed to in that case.
882 */
883 if (local->hw.wiphy->max_scan_ie_len)
884 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
885
886 /* Set up cipher suites unless driver already did */
887 if (!local->hw.wiphy->cipher_suites) {
888 local->hw.wiphy->cipher_suites = cipher_suites;
889 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
890 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
891 local->hw.wiphy->n_cipher_suites--;
892 }
893 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
894 if (local->hw.wiphy->cipher_suites == cipher_suites) {
895 local->hw.wiphy->cipher_suites += 2;
896 local->hw.wiphy->n_cipher_suites -= 2;
897 } else {
898 u32 *suites;
899 int r, w = 0;
900
901 /* Filter out WEP */
902
903 suites = kmemdup(
904 local->hw.wiphy->cipher_suites,
905 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
906 GFP_KERNEL);
907 if (!suites) {
908 result = -ENOMEM;
909 goto fail_wiphy_register;
910 }
911 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
912 u32 suite = local->hw.wiphy->cipher_suites[r];
913 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
914 suite == WLAN_CIPHER_SUITE_WEP104)
915 continue;
916 suites[w++] = suite;
917 }
918 local->hw.wiphy->cipher_suites = suites;
919 local->hw.wiphy->n_cipher_suites = w;
920 local->wiphy_ciphers_allocated = true;
921 }
922 }
923
924 if (!local->ops->remain_on_channel)
925 local->hw.wiphy->max_remain_on_channel_duration = 5000;
926
927 if (local->ops->sched_scan_start)
928 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
929
930 /* mac80211 based drivers don't support internal TDLS setup */
931 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
932 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
933
934 result = wiphy_register(local->hw.wiphy);
935 if (result < 0)
936 goto fail_wiphy_register;
937
938 /*
939 * We use the number of queues for feature tests (QoS, HT) internally
940 * so restrict them appropriately.
941 */
942 if (hw->queues > IEEE80211_MAX_QUEUES)
943 hw->queues = IEEE80211_MAX_QUEUES;
944
945 local->workqueue =
946 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
947 if (!local->workqueue) {
948 result = -ENOMEM;
949 goto fail_workqueue;
950 }
951
952 /*
953 * The hardware needs headroom for sending the frame,
954 * and we need some headroom for passing the frame to monitor
955 * interfaces, but never both at the same time.
956 */
957 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
958 IEEE80211_TX_STATUS_HEADROOM);
959
960 debugfs_hw_add(local);
961
962 /*
963 * if the driver doesn't specify a max listen interval we
964 * use 5 which should be a safe default
965 */
966 if (local->hw.max_listen_interval == 0)
967 local->hw.max_listen_interval = 5;
968
969 local->hw.conf.listen_interval = local->hw.max_listen_interval;
970
971 local->dynamic_ps_forced_timeout = -1;
972
973 result = ieee80211_wep_init(local);
974 if (result < 0)
975 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
976 result);
977
978 ieee80211_led_init(local);
979
980 rtnl_lock();
981
982 result = ieee80211_init_rate_ctrl_alg(local,
983 hw->rate_control_algorithm);
984 if (result < 0) {
985 wiphy_debug(local->hw.wiphy,
986 "Failed to initialize rate control algorithm\n");
987 goto fail_rate;
988 }
989
990 /* add one default STA interface if supported */
991 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
992 result = ieee80211_if_add(local, "wlan%d", NULL,
993 NL80211_IFTYPE_STATION, NULL);
994 if (result)
995 wiphy_warn(local->hw.wiphy,
996 "Failed to add default virtual iface\n");
997 }
998
999 rtnl_unlock();
1000
1001 local->network_latency_notifier.notifier_call =
1002 ieee80211_max_network_latency;
1003 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1004 &local->network_latency_notifier);
1005 if (result) {
1006 rtnl_lock();
1007 goto fail_pm_qos;
1008 }
1009
1010 #ifdef CONFIG_INET
1011 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1012 result = register_inetaddr_notifier(&local->ifa_notifier);
1013 if (result)
1014 goto fail_ifa;
1015 #endif
1016
1017 #if IS_ENABLED(CONFIG_IPV6)
1018 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1019 result = register_inet6addr_notifier(&local->ifa6_notifier);
1020 if (result)
1021 goto fail_ifa6;
1022 #endif
1023
1024 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
1025 local->hw.napi_weight);
1026
1027 return 0;
1028
1029 #if IS_ENABLED(CONFIG_IPV6)
1030 fail_ifa6:
1031 #ifdef CONFIG_INET
1032 unregister_inetaddr_notifier(&local->ifa_notifier);
1033 #endif
1034 #endif
1035 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1036 fail_ifa:
1037 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1038 &local->network_latency_notifier);
1039 rtnl_lock();
1040 #endif
1041 fail_pm_qos:
1042 ieee80211_led_exit(local);
1043 ieee80211_remove_interfaces(local);
1044 fail_rate:
1045 rtnl_unlock();
1046 ieee80211_wep_free(local);
1047 sta_info_stop(local);
1048 destroy_workqueue(local->workqueue);
1049 fail_workqueue:
1050 wiphy_unregister(local->hw.wiphy);
1051 fail_wiphy_register:
1052 if (local->wiphy_ciphers_allocated)
1053 kfree(local->hw.wiphy->cipher_suites);
1054 kfree(local->int_scan_req);
1055 return result;
1056 }
1057 EXPORT_SYMBOL(ieee80211_register_hw);
1058
1059 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1060 {
1061 struct ieee80211_local *local = hw_to_local(hw);
1062
1063 tasklet_kill(&local->tx_pending_tasklet);
1064 tasklet_kill(&local->tasklet);
1065
1066 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1067 &local->network_latency_notifier);
1068 #ifdef CONFIG_INET
1069 unregister_inetaddr_notifier(&local->ifa_notifier);
1070 #endif
1071 #if IS_ENABLED(CONFIG_IPV6)
1072 unregister_inet6addr_notifier(&local->ifa6_notifier);
1073 #endif
1074
1075 rtnl_lock();
1076
1077 /*
1078 * At this point, interface list manipulations are fine
1079 * because the driver cannot be handing us frames any
1080 * more and the tasklet is killed.
1081 */
1082 ieee80211_remove_interfaces(local);
1083
1084 rtnl_unlock();
1085
1086 cancel_work_sync(&local->restart_work);
1087 cancel_work_sync(&local->reconfig_filter);
1088
1089 ieee80211_clear_tx_pending(local);
1090 rate_control_deinitialize(local);
1091
1092 if (skb_queue_len(&local->skb_queue) ||
1093 skb_queue_len(&local->skb_queue_unreliable))
1094 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1095 skb_queue_purge(&local->skb_queue);
1096 skb_queue_purge(&local->skb_queue_unreliable);
1097
1098 destroy_workqueue(local->workqueue);
1099 wiphy_unregister(local->hw.wiphy);
1100 sta_info_stop(local);
1101 ieee80211_wep_free(local);
1102 ieee80211_led_exit(local);
1103 kfree(local->int_scan_req);
1104 }
1105 EXPORT_SYMBOL(ieee80211_unregister_hw);
1106
1107 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1108 {
1109 WARN_ONCE(1, "Have pending ack frames!\n");
1110 kfree_skb(p);
1111 return 0;
1112 }
1113
1114 void ieee80211_free_hw(struct ieee80211_hw *hw)
1115 {
1116 struct ieee80211_local *local = hw_to_local(hw);
1117
1118 mutex_destroy(&local->iflist_mtx);
1119 mutex_destroy(&local->mtx);
1120
1121 if (local->wiphy_ciphers_allocated)
1122 kfree(local->hw.wiphy->cipher_suites);
1123
1124 idr_for_each(&local->ack_status_frames,
1125 ieee80211_free_ack_frame, NULL);
1126 idr_destroy(&local->ack_status_frames);
1127
1128 wiphy_free(local->hw.wiphy);
1129 }
1130 EXPORT_SYMBOL(ieee80211_free_hw);
1131
1132 static int __init ieee80211_init(void)
1133 {
1134 struct sk_buff *skb;
1135 int ret;
1136
1137 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1138 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1139 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1140
1141 ret = rc80211_minstrel_init();
1142 if (ret)
1143 return ret;
1144
1145 ret = rc80211_minstrel_ht_init();
1146 if (ret)
1147 goto err_minstrel;
1148
1149 ret = rc80211_pid_init();
1150 if (ret)
1151 goto err_pid;
1152
1153 ret = ieee80211_iface_init();
1154 if (ret)
1155 goto err_netdev;
1156
1157 return 0;
1158 err_netdev:
1159 rc80211_pid_exit();
1160 err_pid:
1161 rc80211_minstrel_ht_exit();
1162 err_minstrel:
1163 rc80211_minstrel_exit();
1164
1165 return ret;
1166 }
1167
1168 static void __exit ieee80211_exit(void)
1169 {
1170 rc80211_pid_exit();
1171 rc80211_minstrel_ht_exit();
1172 rc80211_minstrel_exit();
1173
1174 ieee80211s_stop();
1175
1176 ieee80211_iface_exit();
1177
1178 rcu_barrier();
1179 }
1180
1181
1182 subsys_initcall(ieee80211_init);
1183 module_exit(ieee80211_exit);
1184
1185 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1186 MODULE_LICENSE("GPL");
Linux with added FPC-III support