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mac80211: add generic cipher scheme support
[deliverable/linux.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 *
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 cfg80211_chan_def chandef = {};
99 u32 changed = 0;
100 int power;
101 u32 offchannel_flag;
102
103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
104
105 if (local->scan_chandef.chan) {
106 chandef = local->scan_chandef;
107 } else if (local->tmp_channel) {
108 chandef.chan = local->tmp_channel;
109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
110 chandef.center_freq1 = chandef.chan->center_freq;
111 } else
112 chandef = local->_oper_chandef;
113
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d MHz width:%d center: %d/%d MHz",
116 chandef.chan->center_freq, chandef.width,
117 chandef.center_freq1, chandef.center_freq2);
118
119 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
121 else
122 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
123
124 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
125
126 if (offchannel_flag ||
127 !cfg80211_chandef_identical(&local->hw.conf.chandef,
128 &local->_oper_chandef)) {
129 local->hw.conf.chandef = chandef;
130 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
131 }
132
133 if (!conf_is_ht(&local->hw.conf)) {
134 /*
135 * mac80211.h documents that this is only valid
136 * when the channel is set to an HT type, and
137 * that otherwise STATIC is used.
138 */
139 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
140 } else if (local->hw.conf.smps_mode != local->smps_mode) {
141 local->hw.conf.smps_mode = local->smps_mode;
142 changed |= IEEE80211_CONF_CHANGE_SMPS;
143 }
144
145 power = ieee80211_chandef_max_power(&chandef);
146
147 rcu_read_lock();
148 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
149 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
150 continue;
151 power = min(power, sdata->vif.bss_conf.txpower);
152 }
153 rcu_read_unlock();
154
155 if (local->hw.conf.power_level != power) {
156 changed |= IEEE80211_CONF_CHANGE_POWER;
157 local->hw.conf.power_level = power;
158 }
159
160 return changed;
161 }
162
163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
164 {
165 int ret = 0;
166
167 might_sleep();
168
169 if (!local->use_chanctx)
170 changed |= ieee80211_hw_conf_chan(local);
171 else
172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173 IEEE80211_CONF_CHANGE_POWER);
174
175 if (changed && local->open_count) {
176 ret = drv_config(local, changed);
177 /*
178 * Goal:
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
181 *
182 * Current status:
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
185 * is enabled
186 *
187 * FIXME: integrate rfkill with mac80211 and then add this
188 * WARN_ON() back
189 *
190 */
191 /* WARN_ON(ret); */
192 }
193
194 return ret;
195 }
196
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 u32 changed)
199 {
200 struct ieee80211_local *local = sdata->local;
201
202 if (!changed)
203 return;
204
205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 }
207
208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209 {
210 sdata->vif.bss_conf.use_cts_prot = false;
211 sdata->vif.bss_conf.use_short_preamble = false;
212 sdata->vif.bss_conf.use_short_slot = false;
213 return BSS_CHANGED_ERP_CTS_PROT |
214 BSS_CHANGED_ERP_PREAMBLE |
215 BSS_CHANGED_ERP_SLOT;
216 }
217
218 static void ieee80211_tasklet_handler(unsigned long data)
219 {
220 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 struct sk_buff *skb;
222
223 while ((skb = skb_dequeue(&local->skb_queue)) ||
224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225 switch (skb->pkt_type) {
226 case IEEE80211_RX_MSG:
227 /* Clear skb->pkt_type in order to not confuse kernel
228 * netstack. */
229 skb->pkt_type = 0;
230 ieee80211_rx(&local->hw, skb);
231 break;
232 case IEEE80211_TX_STATUS_MSG:
233 skb->pkt_type = 0;
234 ieee80211_tx_status(&local->hw, skb);
235 break;
236 default:
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
238 skb->pkt_type);
239 dev_kfree_skb(skb);
240 break;
241 }
242 }
243 }
244
245 static void ieee80211_restart_work(struct work_struct *work)
246 {
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249
250 /* wait for scan work complete */
251 flush_workqueue(local->workqueue);
252
253 mutex_lock(&local->mtx);
254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
255 rcu_dereference_protected(local->sched_scan_sdata,
256 lockdep_is_held(&local->mtx)),
257 "%s called with hardware scan in progress\n", __func__);
258 mutex_unlock(&local->mtx);
259
260 rtnl_lock();
261 ieee80211_scan_cancel(local);
262 ieee80211_reconfig(local);
263 rtnl_unlock();
264 }
265
266 void ieee80211_restart_hw(struct ieee80211_hw *hw)
267 {
268 struct ieee80211_local *local = hw_to_local(hw);
269
270 trace_api_restart_hw(local);
271
272 wiphy_info(hw->wiphy,
273 "Hardware restart was requested\n");
274
275 /* use this reason, ieee80211_reconfig will unblock it */
276 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
277 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
278
279 /*
280 * Stop all Rx during the reconfig. We don't want state changes
281 * or driver callbacks while this is in progress.
282 */
283 local->in_reconfig = true;
284 barrier();
285
286 schedule_work(&local->restart_work);
287 }
288 EXPORT_SYMBOL(ieee80211_restart_hw);
289
290 #ifdef CONFIG_INET
291 static int ieee80211_ifa_changed(struct notifier_block *nb,
292 unsigned long data, void *arg)
293 {
294 struct in_ifaddr *ifa = arg;
295 struct ieee80211_local *local =
296 container_of(nb, struct ieee80211_local,
297 ifa_notifier);
298 struct net_device *ndev = ifa->ifa_dev->dev;
299 struct wireless_dev *wdev = ndev->ieee80211_ptr;
300 struct in_device *idev;
301 struct ieee80211_sub_if_data *sdata;
302 struct ieee80211_bss_conf *bss_conf;
303 struct ieee80211_if_managed *ifmgd;
304 int c = 0;
305
306 /* Make sure it's our interface that got changed */
307 if (!wdev)
308 return NOTIFY_DONE;
309
310 if (wdev->wiphy != local->hw.wiphy)
311 return NOTIFY_DONE;
312
313 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
314 bss_conf = &sdata->vif.bss_conf;
315
316 /* ARP filtering is only supported in managed mode */
317 if (sdata->vif.type != NL80211_IFTYPE_STATION)
318 return NOTIFY_DONE;
319
320 idev = __in_dev_get_rtnl(sdata->dev);
321 if (!idev)
322 return NOTIFY_DONE;
323
324 ifmgd = &sdata->u.mgd;
325 sdata_lock(sdata);
326
327 /* Copy the addresses to the bss_conf list */
328 ifa = idev->ifa_list;
329 while (ifa) {
330 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
331 bss_conf->arp_addr_list[c] = ifa->ifa_address;
332 ifa = ifa->ifa_next;
333 c++;
334 }
335
336 bss_conf->arp_addr_cnt = c;
337
338 /* Configure driver only if associated (which also implies it is up) */
339 if (ifmgd->associated)
340 ieee80211_bss_info_change_notify(sdata,
341 BSS_CHANGED_ARP_FILTER);
342
343 sdata_unlock(sdata);
344
345 return NOTIFY_DONE;
346 }
347 #endif
348
349 #if IS_ENABLED(CONFIG_IPV6)
350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
351 unsigned long data, void *arg)
352 {
353 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
354 struct inet6_dev *idev = ifa->idev;
355 struct net_device *ndev = ifa->idev->dev;
356 struct ieee80211_local *local =
357 container_of(nb, struct ieee80211_local, ifa6_notifier);
358 struct wireless_dev *wdev = ndev->ieee80211_ptr;
359 struct ieee80211_sub_if_data *sdata;
360
361 /* Make sure it's our interface that got changed */
362 if (!wdev || wdev->wiphy != local->hw.wiphy)
363 return NOTIFY_DONE;
364
365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366
367 /*
368 * For now only support station mode. This is mostly because
369 * doing AP would have to handle AP_VLAN in some way ...
370 */
371 if (sdata->vif.type != NL80211_IFTYPE_STATION)
372 return NOTIFY_DONE;
373
374 drv_ipv6_addr_change(local, sdata, idev);
375
376 return NOTIFY_DONE;
377 }
378 #endif
379
380 /* There isn't a lot of sense in it, but you can transmit anything you like */
381 static const struct ieee80211_txrx_stypes
382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
383 [NL80211_IFTYPE_ADHOC] = {
384 .tx = 0xffff,
385 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
386 BIT(IEEE80211_STYPE_AUTH >> 4) |
387 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
388 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
389 },
390 [NL80211_IFTYPE_STATION] = {
391 .tx = 0xffff,
392 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394 },
395 [NL80211_IFTYPE_AP] = {
396 .tx = 0xffff,
397 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
398 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
399 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
400 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
401 BIT(IEEE80211_STYPE_AUTH >> 4) |
402 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
403 BIT(IEEE80211_STYPE_ACTION >> 4),
404 },
405 [NL80211_IFTYPE_AP_VLAN] = {
406 /* copy AP */
407 .tx = 0xffff,
408 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
409 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
411 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
412 BIT(IEEE80211_STYPE_AUTH >> 4) |
413 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414 BIT(IEEE80211_STYPE_ACTION >> 4),
415 },
416 [NL80211_IFTYPE_P2P_CLIENT] = {
417 .tx = 0xffff,
418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
420 },
421 [NL80211_IFTYPE_P2P_GO] = {
422 .tx = 0xffff,
423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
427 BIT(IEEE80211_STYPE_AUTH >> 4) |
428 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
429 BIT(IEEE80211_STYPE_ACTION >> 4),
430 },
431 [NL80211_IFTYPE_MESH_POINT] = {
432 .tx = 0xffff,
433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH >> 4),
436 },
437 [NL80211_IFTYPE_P2P_DEVICE] = {
438 .tx = 0xffff,
439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
441 },
442 };
443
444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
445 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
446 IEEE80211_HT_AMPDU_PARM_DENSITY,
447
448 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
449 IEEE80211_HT_CAP_MAX_AMSDU |
450 IEEE80211_HT_CAP_SGI_20 |
451 IEEE80211_HT_CAP_SGI_40),
452 .mcs = {
453 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
454 0xff, 0xff, 0xff, 0xff, 0xff, },
455 },
456 };
457
458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
459 .vht_cap_info =
460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
461 IEEE80211_VHT_CAP_SHORT_GI_80 |
462 IEEE80211_VHT_CAP_SHORT_GI_160 |
463 IEEE80211_VHT_CAP_RXSTBC_1 |
464 IEEE80211_VHT_CAP_RXSTBC_2 |
465 IEEE80211_VHT_CAP_RXSTBC_3 |
466 IEEE80211_VHT_CAP_RXSTBC_4 |
467 IEEE80211_VHT_CAP_TXSTBC |
468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
473 .supp_mcs = {
474 .rx_mcs_map = cpu_to_le16(~0),
475 .tx_mcs_map = cpu_to_le16(~0),
476 },
477 };
478
479 static const u8 extended_capabilities[] = {
480 0, 0, 0, 0, 0, 0, 0,
481 WLAN_EXT_CAPA8_OPMODE_NOTIF,
482 };
483
484 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
485 const struct ieee80211_ops *ops)
486 {
487 struct ieee80211_local *local;
488 int priv_size, i;
489 struct wiphy *wiphy;
490 bool use_chanctx;
491
492 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
493 !ops->add_interface || !ops->remove_interface ||
494 !ops->configure_filter))
495 return NULL;
496
497 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
498 return NULL;
499
500 /* check all or no channel context operations exist */
501 i = !!ops->add_chanctx + !!ops->remove_chanctx +
502 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
503 !!ops->unassign_vif_chanctx;
504 if (WARN_ON(i != 0 && i != 5))
505 return NULL;
506 use_chanctx = i == 5;
507
508 /* Ensure 32-byte alignment of our private data and hw private data.
509 * We use the wiphy priv data for both our ieee80211_local and for
510 * the driver's private data
511 *
512 * In memory it'll be like this:
513 *
514 * +-------------------------+
515 * | struct wiphy |
516 * +-------------------------+
517 * | struct ieee80211_local |
518 * +-------------------------+
519 * | driver's private data |
520 * +-------------------------+
521 *
522 */
523 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
524
525 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
526
527 if (!wiphy)
528 return NULL;
529
530 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
531
532 wiphy->privid = mac80211_wiphy_privid;
533
534 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
535 WIPHY_FLAG_4ADDR_AP |
536 WIPHY_FLAG_4ADDR_STATION |
537 WIPHY_FLAG_REPORTS_OBSS |
538 WIPHY_FLAG_OFFCHAN_TX;
539
540 wiphy->extended_capabilities = extended_capabilities;
541 wiphy->extended_capabilities_mask = extended_capabilities;
542 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
543
544 if (ops->remain_on_channel)
545 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
546
547 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
548 NL80211_FEATURE_SAE |
549 NL80211_FEATURE_HT_IBSS |
550 NL80211_FEATURE_VIF_TXPOWER |
551 NL80211_FEATURE_USERSPACE_MPM;
552
553 if (!ops->hw_scan)
554 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
555 NL80211_FEATURE_AP_SCAN;
556
557
558 if (!ops->set_key)
559 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
560
561 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
562
563 local = wiphy_priv(wiphy);
564
565 local->hw.wiphy = wiphy;
566
567 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
568
569 local->ops = ops;
570 local->use_chanctx = use_chanctx;
571
572 /* set up some defaults */
573 local->hw.queues = 1;
574 local->hw.max_rates = 1;
575 local->hw.max_report_rates = 0;
576 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
577 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
578 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
579 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
580 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
581 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
582 IEEE80211_RADIOTAP_MCS_HAVE_GI |
583 IEEE80211_RADIOTAP_MCS_HAVE_BW;
584 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
585 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
586 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
587 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
588 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
589 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
590 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
591
592 INIT_LIST_HEAD(&local->interfaces);
593
594 __hw_addr_init(&local->mc_list);
595
596 mutex_init(&local->iflist_mtx);
597 mutex_init(&local->mtx);
598
599 mutex_init(&local->key_mtx);
600 spin_lock_init(&local->filter_lock);
601 spin_lock_init(&local->rx_path_lock);
602 spin_lock_init(&local->queue_stop_reason_lock);
603
604 INIT_LIST_HEAD(&local->chanctx_list);
605 mutex_init(&local->chanctx_mtx);
606
607 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
608
609 INIT_WORK(&local->restart_work, ieee80211_restart_work);
610
611 INIT_WORK(&local->radar_detected_work,
612 ieee80211_dfs_radar_detected_work);
613
614 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
615 local->smps_mode = IEEE80211_SMPS_OFF;
616
617 INIT_WORK(&local->dynamic_ps_enable_work,
618 ieee80211_dynamic_ps_enable_work);
619 INIT_WORK(&local->dynamic_ps_disable_work,
620 ieee80211_dynamic_ps_disable_work);
621 setup_timer(&local->dynamic_ps_timer,
622 ieee80211_dynamic_ps_timer, (unsigned long) local);
623
624 INIT_WORK(&local->sched_scan_stopped_work,
625 ieee80211_sched_scan_stopped_work);
626
627 spin_lock_init(&local->ack_status_lock);
628 idr_init(&local->ack_status_frames);
629
630 sta_info_init(local);
631
632 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
633 skb_queue_head_init(&local->pending[i]);
634 atomic_set(&local->agg_queue_stop[i], 0);
635 }
636 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
637 (unsigned long)local);
638
639 tasklet_init(&local->tasklet,
640 ieee80211_tasklet_handler,
641 (unsigned long) local);
642
643 skb_queue_head_init(&local->skb_queue);
644 skb_queue_head_init(&local->skb_queue_unreliable);
645
646 ieee80211_led_names(local);
647
648 ieee80211_roc_setup(local);
649
650 return &local->hw;
651 }
652 EXPORT_SYMBOL(ieee80211_alloc_hw);
653
654 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
655 {
656 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
657 IS_ERR(local->wep_rx_tfm));
658 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
659 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
660 int n_suites = 0, r = 0, w = 0;
661 u32 *suites;
662 static const u32 cipher_suites[] = {
663 /* keep WEP first, it may be removed below */
664 WLAN_CIPHER_SUITE_WEP40,
665 WLAN_CIPHER_SUITE_WEP104,
666 WLAN_CIPHER_SUITE_TKIP,
667 WLAN_CIPHER_SUITE_CCMP,
668
669 /* keep last -- depends on hw flags! */
670 WLAN_CIPHER_SUITE_AES_CMAC
671 };
672
673 /* Driver specifies the ciphers, we have nothing to do... */
674 if (local->hw.wiphy->cipher_suites && have_wep)
675 return 0;
676
677 /* Set up cipher suites if driver relies on mac80211 cipher defs */
678 if (!local->hw.wiphy->cipher_suites && !cs) {
679 local->hw.wiphy->cipher_suites = cipher_suites;
680 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
681
682 if (!have_mfp)
683 local->hw.wiphy->n_cipher_suites--;
684
685 if (!have_wep) {
686 local->hw.wiphy->cipher_suites += 2;
687 local->hw.wiphy->n_cipher_suites -= 2;
688 }
689
690 return 0;
691 }
692
693 if (!local->hw.wiphy->cipher_suites) {
694 /*
695 * Driver specifies cipher schemes only
696 * We start counting ciphers defined by schemes, TKIP and CCMP
697 */
698 n_suites = local->hw.n_cipher_schemes + 2;
699
700 /* check if we have WEP40 and WEP104 */
701 if (have_wep)
702 n_suites += 2;
703
704 /* check if we have AES_CMAC */
705 if (have_mfp)
706 n_suites++;
707
708 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
709 if (!suites)
710 return -ENOMEM;
711
712 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
713 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
714
715 if (have_wep) {
716 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
717 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
718 }
719
720 if (have_mfp)
721 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
722
723 for (r = 0; r < local->hw.n_cipher_schemes; r++)
724 suites[w++] = cs[r].cipher;
725 } else {
726 /* Driver provides cipher suites, but we need to exclude WEP */
727 suites = kmemdup(local->hw.wiphy->cipher_suites,
728 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
729 GFP_KERNEL);
730 if (!suites)
731 return -ENOMEM;
732
733 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
734 u32 suite = local->hw.wiphy->cipher_suites[r];
735
736 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
737 suite == WLAN_CIPHER_SUITE_WEP104)
738 continue;
739 suites[w++] = suite;
740 }
741 }
742
743 local->hw.wiphy->cipher_suites = suites;
744 local->hw.wiphy->n_cipher_suites = w;
745 local->wiphy_ciphers_allocated = true;
746
747 return 0;
748 }
749
750 int ieee80211_register_hw(struct ieee80211_hw *hw)
751 {
752 struct ieee80211_local *local = hw_to_local(hw);
753 int result, i;
754 enum ieee80211_band band;
755 int channels, max_bitrates;
756 bool supp_ht, supp_vht;
757 netdev_features_t feature_whitelist;
758 struct cfg80211_chan_def dflt_chandef = {};
759
760 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
761 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
762 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
763 return -EINVAL;
764
765 #ifdef CONFIG_PM
766 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
767 return -EINVAL;
768 #endif
769
770 if (!local->use_chanctx) {
771 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
772 const struct ieee80211_iface_combination *comb;
773
774 comb = &local->hw.wiphy->iface_combinations[i];
775
776 if (comb->num_different_channels > 1)
777 return -EINVAL;
778 }
779 } else {
780 /*
781 * WDS is currently prohibited when channel contexts are used
782 * because there's no clear definition of which channel WDS
783 * type interfaces use
784 */
785 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
786 return -EINVAL;
787
788 /* DFS currently not supported with channel context drivers */
789 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
790 const struct ieee80211_iface_combination *comb;
791
792 comb = &local->hw.wiphy->iface_combinations[i];
793
794 if (comb->radar_detect_widths)
795 return -EINVAL;
796 }
797 }
798
799 /* Only HW csum features are currently compatible with mac80211 */
800 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
801 NETIF_F_HW_CSUM;
802 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
803 return -EINVAL;
804
805 if (hw->max_report_rates == 0)
806 hw->max_report_rates = hw->max_rates;
807
808 local->rx_chains = 1;
809
810 /*
811 * generic code guarantees at least one band,
812 * set this very early because much code assumes
813 * that hw.conf.channel is assigned
814 */
815 channels = 0;
816 max_bitrates = 0;
817 supp_ht = false;
818 supp_vht = false;
819 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
820 struct ieee80211_supported_band *sband;
821
822 sband = local->hw.wiphy->bands[band];
823 if (!sband)
824 continue;
825
826 if (!dflt_chandef.chan) {
827 cfg80211_chandef_create(&dflt_chandef,
828 &sband->channels[0],
829 NL80211_CHAN_NO_HT);
830 /* init channel we're on */
831 if (!local->use_chanctx && !local->_oper_chandef.chan) {
832 local->hw.conf.chandef = dflt_chandef;
833 local->_oper_chandef = dflt_chandef;
834 }
835 local->monitor_chandef = dflt_chandef;
836 }
837
838 channels += sband->n_channels;
839
840 if (max_bitrates < sband->n_bitrates)
841 max_bitrates = sband->n_bitrates;
842 supp_ht = supp_ht || sband->ht_cap.ht_supported;
843 supp_vht = supp_vht || sband->vht_cap.vht_supported;
844
845 if (sband->ht_cap.ht_supported)
846 local->rx_chains =
847 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
848 local->rx_chains);
849
850 /* TODO: consider VHT for RX chains, hopefully it's the same */
851 }
852
853 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
854 sizeof(void *) * channels, GFP_KERNEL);
855 if (!local->int_scan_req)
856 return -ENOMEM;
857
858 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
859 if (!local->hw.wiphy->bands[band])
860 continue;
861 local->int_scan_req->rates[band] = (u32) -1;
862 }
863
864 /* if low-level driver supports AP, we also support VLAN */
865 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
866 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
867 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
868 }
869
870 /* mac80211 always supports monitor */
871 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
872 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
873
874 /* mac80211 doesn't support more than one IBSS interface right now */
875 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
876 const struct ieee80211_iface_combination *c;
877 int j;
878
879 c = &hw->wiphy->iface_combinations[i];
880
881 for (j = 0; j < c->n_limits; j++)
882 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
883 c->limits[j].max > 1)
884 return -EINVAL;
885 }
886
887 #ifndef CONFIG_MAC80211_MESH
888 /* mesh depends on Kconfig, but drivers should set it if they want */
889 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
890 #endif
891
892 /* if the underlying driver supports mesh, mac80211 will (at least)
893 * provide routing of mesh authentication frames to userspace */
894 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
895 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
896
897 /* mac80211 supports control port protocol changing */
898 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
899
900 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
901 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
902 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
903 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
904
905 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
906 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
907 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
908
909 /*
910 * Calculate scan IE length -- we need this to alloc
911 * memory and to subtract from the driver limit. It
912 * includes the DS Params, (extended) supported rates, and HT
913 * information -- SSID is the driver's responsibility.
914 */
915 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
916 3 /* DS Params */;
917 if (supp_ht)
918 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
919
920 if (supp_vht)
921 local->scan_ies_len +=
922 2 + sizeof(struct ieee80211_vht_cap);
923
924 if (!local->ops->hw_scan) {
925 /* For hw_scan, driver needs to set these up. */
926 local->hw.wiphy->max_scan_ssids = 4;
927 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
928 }
929
930 /*
931 * If the driver supports any scan IEs, then assume the
932 * limit includes the IEs mac80211 will add, otherwise
933 * leave it at zero and let the driver sort it out; we
934 * still pass our IEs to the driver but userspace will
935 * not be allowed to in that case.
936 */
937 if (local->hw.wiphy->max_scan_ie_len)
938 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
939
940 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
941 local->hw.n_cipher_schemes));
942
943 result = ieee80211_init_cipher_suites(local);
944 if (result < 0)
945 goto fail_wiphy_register;
946
947 if (!local->ops->remain_on_channel)
948 local->hw.wiphy->max_remain_on_channel_duration = 5000;
949
950 /* mac80211 based drivers don't support internal TDLS setup */
951 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
952 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
953
954 result = wiphy_register(local->hw.wiphy);
955 if (result < 0)
956 goto fail_wiphy_register;
957
958 /*
959 * We use the number of queues for feature tests (QoS, HT) internally
960 * so restrict them appropriately.
961 */
962 if (hw->queues > IEEE80211_MAX_QUEUES)
963 hw->queues = IEEE80211_MAX_QUEUES;
964
965 local->workqueue =
966 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
967 if (!local->workqueue) {
968 result = -ENOMEM;
969 goto fail_workqueue;
970 }
971
972 /*
973 * The hardware needs headroom for sending the frame,
974 * and we need some headroom for passing the frame to monitor
975 * interfaces, but never both at the same time.
976 */
977 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
978 IEEE80211_TX_STATUS_HEADROOM);
979
980 debugfs_hw_add(local);
981
982 /*
983 * if the driver doesn't specify a max listen interval we
984 * use 5 which should be a safe default
985 */
986 if (local->hw.max_listen_interval == 0)
987 local->hw.max_listen_interval = 5;
988
989 local->hw.conf.listen_interval = local->hw.max_listen_interval;
990
991 local->dynamic_ps_forced_timeout = -1;
992
993 result = ieee80211_wep_init(local);
994 if (result < 0)
995 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
996 result);
997
998 ieee80211_led_init(local);
999
1000 rtnl_lock();
1001
1002 result = ieee80211_init_rate_ctrl_alg(local,
1003 hw->rate_control_algorithm);
1004 if (result < 0) {
1005 wiphy_debug(local->hw.wiphy,
1006 "Failed to initialize rate control algorithm\n");
1007 goto fail_rate;
1008 }
1009
1010 /* add one default STA interface if supported */
1011 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1012 result = ieee80211_if_add(local, "wlan%d", NULL,
1013 NL80211_IFTYPE_STATION, NULL);
1014 if (result)
1015 wiphy_warn(local->hw.wiphy,
1016 "Failed to add default virtual iface\n");
1017 }
1018
1019 rtnl_unlock();
1020
1021 local->network_latency_notifier.notifier_call =
1022 ieee80211_max_network_latency;
1023 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1024 &local->network_latency_notifier);
1025 if (result) {
1026 rtnl_lock();
1027 goto fail_pm_qos;
1028 }
1029
1030 #ifdef CONFIG_INET
1031 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1032 result = register_inetaddr_notifier(&local->ifa_notifier);
1033 if (result)
1034 goto fail_ifa;
1035 #endif
1036
1037 #if IS_ENABLED(CONFIG_IPV6)
1038 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1039 result = register_inet6addr_notifier(&local->ifa6_notifier);
1040 if (result)
1041 goto fail_ifa6;
1042 #endif
1043
1044 return 0;
1045
1046 #if IS_ENABLED(CONFIG_IPV6)
1047 fail_ifa6:
1048 #ifdef CONFIG_INET
1049 unregister_inetaddr_notifier(&local->ifa_notifier);
1050 #endif
1051 #endif
1052 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1053 fail_ifa:
1054 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1055 &local->network_latency_notifier);
1056 rtnl_lock();
1057 #endif
1058 fail_pm_qos:
1059 ieee80211_led_exit(local);
1060 ieee80211_remove_interfaces(local);
1061 fail_rate:
1062 rtnl_unlock();
1063 ieee80211_wep_free(local);
1064 sta_info_stop(local);
1065 destroy_workqueue(local->workqueue);
1066 fail_workqueue:
1067 wiphy_unregister(local->hw.wiphy);
1068 fail_wiphy_register:
1069 if (local->wiphy_ciphers_allocated)
1070 kfree(local->hw.wiphy->cipher_suites);
1071 kfree(local->int_scan_req);
1072 return result;
1073 }
1074 EXPORT_SYMBOL(ieee80211_register_hw);
1075
1076 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1077 {
1078 struct ieee80211_local *local = hw_to_local(hw);
1079
1080 tasklet_kill(&local->tx_pending_tasklet);
1081 tasklet_kill(&local->tasklet);
1082
1083 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1084 &local->network_latency_notifier);
1085 #ifdef CONFIG_INET
1086 unregister_inetaddr_notifier(&local->ifa_notifier);
1087 #endif
1088 #if IS_ENABLED(CONFIG_IPV6)
1089 unregister_inet6addr_notifier(&local->ifa6_notifier);
1090 #endif
1091
1092 rtnl_lock();
1093
1094 /*
1095 * At this point, interface list manipulations are fine
1096 * because the driver cannot be handing us frames any
1097 * more and the tasklet is killed.
1098 */
1099 ieee80211_remove_interfaces(local);
1100
1101 rtnl_unlock();
1102
1103 cancel_work_sync(&local->restart_work);
1104 cancel_work_sync(&local->reconfig_filter);
1105
1106 ieee80211_clear_tx_pending(local);
1107 rate_control_deinitialize(local);
1108
1109 if (skb_queue_len(&local->skb_queue) ||
1110 skb_queue_len(&local->skb_queue_unreliable))
1111 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1112 skb_queue_purge(&local->skb_queue);
1113 skb_queue_purge(&local->skb_queue_unreliable);
1114
1115 destroy_workqueue(local->workqueue);
1116 wiphy_unregister(local->hw.wiphy);
1117 sta_info_stop(local);
1118 ieee80211_wep_free(local);
1119 ieee80211_led_exit(local);
1120 kfree(local->int_scan_req);
1121 }
1122 EXPORT_SYMBOL(ieee80211_unregister_hw);
1123
1124 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1125 {
1126 WARN_ONCE(1, "Have pending ack frames!\n");
1127 kfree_skb(p);
1128 return 0;
1129 }
1130
1131 void ieee80211_free_hw(struct ieee80211_hw *hw)
1132 {
1133 struct ieee80211_local *local = hw_to_local(hw);
1134
1135 mutex_destroy(&local->iflist_mtx);
1136 mutex_destroy(&local->mtx);
1137
1138 if (local->wiphy_ciphers_allocated)
1139 kfree(local->hw.wiphy->cipher_suites);
1140
1141 idr_for_each(&local->ack_status_frames,
1142 ieee80211_free_ack_frame, NULL);
1143 idr_destroy(&local->ack_status_frames);
1144
1145 wiphy_free(local->hw.wiphy);
1146 }
1147 EXPORT_SYMBOL(ieee80211_free_hw);
1148
1149 static int __init ieee80211_init(void)
1150 {
1151 struct sk_buff *skb;
1152 int ret;
1153
1154 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1155 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1156 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1157
1158 ret = rc80211_minstrel_init();
1159 if (ret)
1160 return ret;
1161
1162 ret = rc80211_minstrel_ht_init();
1163 if (ret)
1164 goto err_minstrel;
1165
1166 ret = rc80211_pid_init();
1167 if (ret)
1168 goto err_pid;
1169
1170 ret = ieee80211_iface_init();
1171 if (ret)
1172 goto err_netdev;
1173
1174 return 0;
1175 err_netdev:
1176 rc80211_pid_exit();
1177 err_pid:
1178 rc80211_minstrel_ht_exit();
1179 err_minstrel:
1180 rc80211_minstrel_exit();
1181
1182 return ret;
1183 }
1184
1185 static void __exit ieee80211_exit(void)
1186 {
1187 rc80211_pid_exit();
1188 rc80211_minstrel_ht_exit();
1189 rc80211_minstrel_exit();
1190
1191 ieee80211s_stop();
1192
1193 ieee80211_iface_exit();
1194
1195 rcu_barrier();
1196 }
1197
1198
1199 subsys_initcall(ieee80211_init);
1200 module_exit(ieee80211_exit);
1201
1202 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1203 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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