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ASoC: rsnd: move priv member settings to upper side
[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 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
255
256 rtnl_lock();
257 ieee80211_scan_cancel(local);
258 ieee80211_reconfig(local);
259 rtnl_unlock();
260 }
261
262 void ieee80211_restart_hw(struct ieee80211_hw *hw)
263 {
264 struct ieee80211_local *local = hw_to_local(hw);
265
266 trace_api_restart_hw(local);
267
268 wiphy_info(hw->wiphy,
269 "Hardware restart was requested\n");
270
271 /* use this reason, ieee80211_reconfig will unblock it */
272 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
273 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
274
275 /*
276 * Stop all Rx during the reconfig. We don't want state changes
277 * or driver callbacks while this is in progress.
278 */
279 local->in_reconfig = true;
280 barrier();
281
282 schedule_work(&local->restart_work);
283 }
284 EXPORT_SYMBOL(ieee80211_restart_hw);
285
286 #ifdef CONFIG_INET
287 static int ieee80211_ifa_changed(struct notifier_block *nb,
288 unsigned long data, void *arg)
289 {
290 struct in_ifaddr *ifa = arg;
291 struct ieee80211_local *local =
292 container_of(nb, struct ieee80211_local,
293 ifa_notifier);
294 struct net_device *ndev = ifa->ifa_dev->dev;
295 struct wireless_dev *wdev = ndev->ieee80211_ptr;
296 struct in_device *idev;
297 struct ieee80211_sub_if_data *sdata;
298 struct ieee80211_bss_conf *bss_conf;
299 struct ieee80211_if_managed *ifmgd;
300 int c = 0;
301
302 /* Make sure it's our interface that got changed */
303 if (!wdev)
304 return NOTIFY_DONE;
305
306 if (wdev->wiphy != local->hw.wiphy)
307 return NOTIFY_DONE;
308
309 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
310 bss_conf = &sdata->vif.bss_conf;
311
312 /* ARP filtering is only supported in managed mode */
313 if (sdata->vif.type != NL80211_IFTYPE_STATION)
314 return NOTIFY_DONE;
315
316 idev = __in_dev_get_rtnl(sdata->dev);
317 if (!idev)
318 return NOTIFY_DONE;
319
320 ifmgd = &sdata->u.mgd;
321 sdata_lock(sdata);
322
323 /* Copy the addresses to the bss_conf list */
324 ifa = idev->ifa_list;
325 while (ifa) {
326 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
327 bss_conf->arp_addr_list[c] = ifa->ifa_address;
328 ifa = ifa->ifa_next;
329 c++;
330 }
331
332 bss_conf->arp_addr_cnt = c;
333
334 /* Configure driver only if associated (which also implies it is up) */
335 if (ifmgd->associated)
336 ieee80211_bss_info_change_notify(sdata,
337 BSS_CHANGED_ARP_FILTER);
338
339 sdata_unlock(sdata);
340
341 return NOTIFY_DONE;
342 }
343 #endif
344
345 #if IS_ENABLED(CONFIG_IPV6)
346 static int ieee80211_ifa6_changed(struct notifier_block *nb,
347 unsigned long data, void *arg)
348 {
349 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
350 struct inet6_dev *idev = ifa->idev;
351 struct net_device *ndev = ifa->idev->dev;
352 struct ieee80211_local *local =
353 container_of(nb, struct ieee80211_local, ifa6_notifier);
354 struct wireless_dev *wdev = ndev->ieee80211_ptr;
355 struct ieee80211_sub_if_data *sdata;
356
357 /* Make sure it's our interface that got changed */
358 if (!wdev || wdev->wiphy != local->hw.wiphy)
359 return NOTIFY_DONE;
360
361 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
362
363 /*
364 * For now only support station mode. This is mostly because
365 * doing AP would have to handle AP_VLAN in some way ...
366 */
367 if (sdata->vif.type != NL80211_IFTYPE_STATION)
368 return NOTIFY_DONE;
369
370 drv_ipv6_addr_change(local, sdata, idev);
371
372 return NOTIFY_DONE;
373 }
374 #endif
375
376 /* There isn't a lot of sense in it, but you can transmit anything you like */
377 static const struct ieee80211_txrx_stypes
378 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
379 [NL80211_IFTYPE_ADHOC] = {
380 .tx = 0xffff,
381 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
382 BIT(IEEE80211_STYPE_AUTH >> 4) |
383 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
384 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
385 },
386 [NL80211_IFTYPE_STATION] = {
387 .tx = 0xffff,
388 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
389 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
390 },
391 [NL80211_IFTYPE_AP] = {
392 .tx = 0xffff,
393 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
394 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
395 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
396 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
397 BIT(IEEE80211_STYPE_AUTH >> 4) |
398 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
399 BIT(IEEE80211_STYPE_ACTION >> 4),
400 },
401 [NL80211_IFTYPE_AP_VLAN] = {
402 /* copy AP */
403 .tx = 0xffff,
404 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
405 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
406 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
407 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
408 BIT(IEEE80211_STYPE_AUTH >> 4) |
409 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
410 BIT(IEEE80211_STYPE_ACTION >> 4),
411 },
412 [NL80211_IFTYPE_P2P_CLIENT] = {
413 .tx = 0xffff,
414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
416 },
417 [NL80211_IFTYPE_P2P_GO] = {
418 .tx = 0xffff,
419 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
420 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
421 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
422 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
423 BIT(IEEE80211_STYPE_AUTH >> 4) |
424 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
425 BIT(IEEE80211_STYPE_ACTION >> 4),
426 },
427 [NL80211_IFTYPE_MESH_POINT] = {
428 .tx = 0xffff,
429 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
430 BIT(IEEE80211_STYPE_AUTH >> 4) |
431 BIT(IEEE80211_STYPE_DEAUTH >> 4),
432 },
433 [NL80211_IFTYPE_P2P_DEVICE] = {
434 .tx = 0xffff,
435 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
436 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
437 },
438 };
439
440 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
441 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
442 IEEE80211_HT_AMPDU_PARM_DENSITY,
443
444 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
445 IEEE80211_HT_CAP_MAX_AMSDU |
446 IEEE80211_HT_CAP_SGI_20 |
447 IEEE80211_HT_CAP_SGI_40),
448 .mcs = {
449 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
450 0xff, 0xff, 0xff, 0xff, 0xff, },
451 },
452 };
453
454 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
455 .vht_cap_info =
456 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
457 IEEE80211_VHT_CAP_SHORT_GI_80 |
458 IEEE80211_VHT_CAP_SHORT_GI_160 |
459 IEEE80211_VHT_CAP_RXSTBC_1 |
460 IEEE80211_VHT_CAP_RXSTBC_2 |
461 IEEE80211_VHT_CAP_RXSTBC_3 |
462 IEEE80211_VHT_CAP_RXSTBC_4 |
463 IEEE80211_VHT_CAP_TXSTBC |
464 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
465 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
466 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
467 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
468 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
469 .supp_mcs = {
470 .rx_mcs_map = cpu_to_le16(~0),
471 .tx_mcs_map = cpu_to_le16(~0),
472 },
473 };
474
475 static const u8 extended_capabilities[] = {
476 0, 0, 0, 0, 0, 0, 0,
477 WLAN_EXT_CAPA8_OPMODE_NOTIF,
478 };
479
480 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
481 const struct ieee80211_ops *ops)
482 {
483 struct ieee80211_local *local;
484 int priv_size, i;
485 struct wiphy *wiphy;
486 bool use_chanctx;
487
488 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
489 !ops->add_interface || !ops->remove_interface ||
490 !ops->configure_filter))
491 return NULL;
492
493 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
494 return NULL;
495
496 /* check all or no channel context operations exist */
497 i = !!ops->add_chanctx + !!ops->remove_chanctx +
498 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
499 !!ops->unassign_vif_chanctx;
500 if (WARN_ON(i != 0 && i != 5))
501 return NULL;
502 use_chanctx = i == 5;
503
504 /* Ensure 32-byte alignment of our private data and hw private data.
505 * We use the wiphy priv data for both our ieee80211_local and for
506 * the driver's private data
507 *
508 * In memory it'll be like this:
509 *
510 * +-------------------------+
511 * | struct wiphy |
512 * +-------------------------+
513 * | struct ieee80211_local |
514 * +-------------------------+
515 * | driver's private data |
516 * +-------------------------+
517 *
518 */
519 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
520
521 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
522
523 if (!wiphy)
524 return NULL;
525
526 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
527
528 wiphy->privid = mac80211_wiphy_privid;
529
530 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
531 WIPHY_FLAG_4ADDR_AP |
532 WIPHY_FLAG_4ADDR_STATION |
533 WIPHY_FLAG_REPORTS_OBSS |
534 WIPHY_FLAG_OFFCHAN_TX;
535
536 wiphy->extended_capabilities = extended_capabilities;
537 wiphy->extended_capabilities_mask = extended_capabilities;
538 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
539
540 if (ops->remain_on_channel)
541 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
542
543 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
544 NL80211_FEATURE_SAE |
545 NL80211_FEATURE_HT_IBSS |
546 NL80211_FEATURE_VIF_TXPOWER |
547 NL80211_FEATURE_USERSPACE_MPM;
548
549 if (!ops->hw_scan)
550 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
551 NL80211_FEATURE_AP_SCAN;
552
553
554 if (!ops->set_key)
555 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
556
557 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
558
559 local = wiphy_priv(wiphy);
560
561 local->hw.wiphy = wiphy;
562
563 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
564
565 local->ops = ops;
566 local->use_chanctx = use_chanctx;
567
568 /* set up some defaults */
569 local->hw.queues = 1;
570 local->hw.max_rates = 1;
571 local->hw.max_report_rates = 0;
572 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
573 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
574 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
575 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
576 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
577 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
578 IEEE80211_RADIOTAP_MCS_HAVE_GI |
579 IEEE80211_RADIOTAP_MCS_HAVE_BW;
580 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
581 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
582 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
583 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
584 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
585 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
586 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
587
588 INIT_LIST_HEAD(&local->interfaces);
589
590 __hw_addr_init(&local->mc_list);
591
592 mutex_init(&local->iflist_mtx);
593 mutex_init(&local->mtx);
594
595 mutex_init(&local->key_mtx);
596 spin_lock_init(&local->filter_lock);
597 spin_lock_init(&local->rx_path_lock);
598 spin_lock_init(&local->queue_stop_reason_lock);
599
600 INIT_LIST_HEAD(&local->chanctx_list);
601 mutex_init(&local->chanctx_mtx);
602
603 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
604
605 INIT_WORK(&local->restart_work, ieee80211_restart_work);
606
607 INIT_WORK(&local->radar_detected_work,
608 ieee80211_dfs_radar_detected_work);
609
610 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
611 local->smps_mode = IEEE80211_SMPS_OFF;
612
613 INIT_WORK(&local->dynamic_ps_enable_work,
614 ieee80211_dynamic_ps_enable_work);
615 INIT_WORK(&local->dynamic_ps_disable_work,
616 ieee80211_dynamic_ps_disable_work);
617 setup_timer(&local->dynamic_ps_timer,
618 ieee80211_dynamic_ps_timer, (unsigned long) local);
619
620 INIT_WORK(&local->sched_scan_stopped_work,
621 ieee80211_sched_scan_stopped_work);
622
623 spin_lock_init(&local->ack_status_lock);
624 idr_init(&local->ack_status_frames);
625
626 sta_info_init(local);
627
628 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
629 skb_queue_head_init(&local->pending[i]);
630 atomic_set(&local->agg_queue_stop[i], 0);
631 }
632 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
633 (unsigned long)local);
634
635 tasklet_init(&local->tasklet,
636 ieee80211_tasklet_handler,
637 (unsigned long) local);
638
639 skb_queue_head_init(&local->skb_queue);
640 skb_queue_head_init(&local->skb_queue_unreliable);
641
642 ieee80211_led_names(local);
643
644 ieee80211_roc_setup(local);
645
646 return &local->hw;
647 }
648 EXPORT_SYMBOL(ieee80211_alloc_hw);
649
650 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
651 {
652 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
653 IS_ERR(local->wep_rx_tfm));
654 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
655 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
656 int n_suites = 0, r = 0, w = 0;
657 u32 *suites;
658 static const u32 cipher_suites[] = {
659 /* keep WEP first, it may be removed below */
660 WLAN_CIPHER_SUITE_WEP40,
661 WLAN_CIPHER_SUITE_WEP104,
662 WLAN_CIPHER_SUITE_TKIP,
663 WLAN_CIPHER_SUITE_CCMP,
664
665 /* keep last -- depends on hw flags! */
666 WLAN_CIPHER_SUITE_AES_CMAC
667 };
668
669 /* Driver specifies the ciphers, we have nothing to do... */
670 if (local->hw.wiphy->cipher_suites && have_wep)
671 return 0;
672
673 /* Set up cipher suites if driver relies on mac80211 cipher defs */
674 if (!local->hw.wiphy->cipher_suites && !cs) {
675 local->hw.wiphy->cipher_suites = cipher_suites;
676 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
677
678 if (!have_mfp)
679 local->hw.wiphy->n_cipher_suites--;
680
681 if (!have_wep) {
682 local->hw.wiphy->cipher_suites += 2;
683 local->hw.wiphy->n_cipher_suites -= 2;
684 }
685
686 return 0;
687 }
688
689 if (!local->hw.wiphy->cipher_suites) {
690 /*
691 * Driver specifies cipher schemes only
692 * We start counting ciphers defined by schemes, TKIP and CCMP
693 */
694 n_suites = local->hw.n_cipher_schemes + 2;
695
696 /* check if we have WEP40 and WEP104 */
697 if (have_wep)
698 n_suites += 2;
699
700 /* check if we have AES_CMAC */
701 if (have_mfp)
702 n_suites++;
703
704 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
705 if (!suites)
706 return -ENOMEM;
707
708 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
709 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
710
711 if (have_wep) {
712 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
713 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
714 }
715
716 if (have_mfp)
717 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
718
719 for (r = 0; r < local->hw.n_cipher_schemes; r++)
720 suites[w++] = cs[r].cipher;
721 } else {
722 /* Driver provides cipher suites, but we need to exclude WEP */
723 suites = kmemdup(local->hw.wiphy->cipher_suites,
724 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
725 GFP_KERNEL);
726 if (!suites)
727 return -ENOMEM;
728
729 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
730 u32 suite = local->hw.wiphy->cipher_suites[r];
731
732 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
733 suite == WLAN_CIPHER_SUITE_WEP104)
734 continue;
735 suites[w++] = suite;
736 }
737 }
738
739 local->hw.wiphy->cipher_suites = suites;
740 local->hw.wiphy->n_cipher_suites = w;
741 local->wiphy_ciphers_allocated = true;
742
743 return 0;
744 }
745
746 int ieee80211_register_hw(struct ieee80211_hw *hw)
747 {
748 struct ieee80211_local *local = hw_to_local(hw);
749 int result, i;
750 enum ieee80211_band band;
751 int channels, max_bitrates;
752 bool supp_ht, supp_vht;
753 netdev_features_t feature_whitelist;
754 struct cfg80211_chan_def dflt_chandef = {};
755
756 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
757 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
758 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
759 return -EINVAL;
760
761 #ifdef CONFIG_PM
762 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
763 return -EINVAL;
764 #endif
765
766 if (!local->use_chanctx) {
767 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
768 const struct ieee80211_iface_combination *comb;
769
770 comb = &local->hw.wiphy->iface_combinations[i];
771
772 if (comb->num_different_channels > 1)
773 return -EINVAL;
774 }
775 } else {
776 /*
777 * WDS is currently prohibited when channel contexts are used
778 * because there's no clear definition of which channel WDS
779 * type interfaces use
780 */
781 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
782 return -EINVAL;
783
784 /* DFS currently not supported with channel context drivers */
785 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
786 const struct ieee80211_iface_combination *comb;
787
788 comb = &local->hw.wiphy->iface_combinations[i];
789
790 if (comb->radar_detect_widths)
791 return -EINVAL;
792 }
793 }
794
795 /* Only HW csum features are currently compatible with mac80211 */
796 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
797 NETIF_F_HW_CSUM;
798 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
799 return -EINVAL;
800
801 if (hw->max_report_rates == 0)
802 hw->max_report_rates = hw->max_rates;
803
804 local->rx_chains = 1;
805
806 /*
807 * generic code guarantees at least one band,
808 * set this very early because much code assumes
809 * that hw.conf.channel is assigned
810 */
811 channels = 0;
812 max_bitrates = 0;
813 supp_ht = false;
814 supp_vht = false;
815 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
816 struct ieee80211_supported_band *sband;
817
818 sband = local->hw.wiphy->bands[band];
819 if (!sband)
820 continue;
821
822 if (!dflt_chandef.chan) {
823 cfg80211_chandef_create(&dflt_chandef,
824 &sband->channels[0],
825 NL80211_CHAN_NO_HT);
826 /* init channel we're on */
827 if (!local->use_chanctx && !local->_oper_chandef.chan) {
828 local->hw.conf.chandef = dflt_chandef;
829 local->_oper_chandef = dflt_chandef;
830 }
831 local->monitor_chandef = dflt_chandef;
832 }
833
834 channels += sband->n_channels;
835
836 if (max_bitrates < sband->n_bitrates)
837 max_bitrates = sband->n_bitrates;
838 supp_ht = supp_ht || sband->ht_cap.ht_supported;
839 supp_vht = supp_vht || sband->vht_cap.vht_supported;
840
841 if (sband->ht_cap.ht_supported)
842 local->rx_chains =
843 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
844 local->rx_chains);
845
846 /* TODO: consider VHT for RX chains, hopefully it's the same */
847 }
848
849 /* if low-level driver supports AP, we also support VLAN */
850 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
851 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
852 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
853 }
854
855 /* mac80211 always supports monitor */
856 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
857 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
858
859 /* mac80211 doesn't support more than one IBSS interface right now */
860 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
861 const struct ieee80211_iface_combination *c;
862 int j;
863
864 c = &hw->wiphy->iface_combinations[i];
865
866 for (j = 0; j < c->n_limits; j++)
867 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
868 c->limits[j].max > 1)
869 return -EINVAL;
870 }
871
872 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
873 sizeof(void *) * channels, GFP_KERNEL);
874 if (!local->int_scan_req)
875 return -ENOMEM;
876
877 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
878 if (!local->hw.wiphy->bands[band])
879 continue;
880 local->int_scan_req->rates[band] = (u32) -1;
881 }
882
883 #ifndef CONFIG_MAC80211_MESH
884 /* mesh depends on Kconfig, but drivers should set it if they want */
885 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
886 #endif
887
888 /* if the underlying driver supports mesh, mac80211 will (at least)
889 * provide routing of mesh authentication frames to userspace */
890 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
891 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
892
893 /* mac80211 supports control port protocol changing */
894 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
895
896 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
897 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
898 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
899 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
900
901 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
902 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
903 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
904
905 /*
906 * Calculate scan IE length -- we need this to alloc
907 * memory and to subtract from the driver limit. It
908 * includes the DS Params, (extended) supported rates, and HT
909 * information -- SSID is the driver's responsibility.
910 */
911 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
912 3 /* DS Params */;
913 if (supp_ht)
914 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
915
916 if (supp_vht)
917 local->scan_ies_len +=
918 2 + sizeof(struct ieee80211_vht_cap);
919
920 if (!local->ops->hw_scan) {
921 /* For hw_scan, driver needs to set these up. */
922 local->hw.wiphy->max_scan_ssids = 4;
923 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
924 }
925
926 /*
927 * If the driver supports any scan IEs, then assume the
928 * limit includes the IEs mac80211 will add, otherwise
929 * leave it at zero and let the driver sort it out; we
930 * still pass our IEs to the driver but userspace will
931 * not be allowed to in that case.
932 */
933 if (local->hw.wiphy->max_scan_ie_len)
934 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
935
936 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
937 local->hw.n_cipher_schemes));
938
939 result = ieee80211_init_cipher_suites(local);
940 if (result < 0)
941 goto fail_wiphy_register;
942
943 if (!local->ops->remain_on_channel)
944 local->hw.wiphy->max_remain_on_channel_duration = 5000;
945
946 /* mac80211 based drivers don't support internal TDLS setup */
947 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
948 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
949
950 result = wiphy_register(local->hw.wiphy);
951 if (result < 0)
952 goto fail_wiphy_register;
953
954 /*
955 * We use the number of queues for feature tests (QoS, HT) internally
956 * so restrict them appropriately.
957 */
958 if (hw->queues > IEEE80211_MAX_QUEUES)
959 hw->queues = IEEE80211_MAX_QUEUES;
960
961 local->workqueue =
962 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
963 if (!local->workqueue) {
964 result = -ENOMEM;
965 goto fail_workqueue;
966 }
967
968 /*
969 * The hardware needs headroom for sending the frame,
970 * and we need some headroom for passing the frame to monitor
971 * interfaces, but never both at the same time.
972 */
973 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
974 IEEE80211_TX_STATUS_HEADROOM);
975
976 debugfs_hw_add(local);
977
978 /*
979 * if the driver doesn't specify a max listen interval we
980 * use 5 which should be a safe default
981 */
982 if (local->hw.max_listen_interval == 0)
983 local->hw.max_listen_interval = 5;
984
985 local->hw.conf.listen_interval = local->hw.max_listen_interval;
986
987 local->dynamic_ps_forced_timeout = -1;
988
989 result = ieee80211_wep_init(local);
990 if (result < 0)
991 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
992 result);
993
994 local->hw.conf.flags = IEEE80211_CONF_IDLE;
995
996 ieee80211_led_init(local);
997
998 rtnl_lock();
999
1000 result = ieee80211_init_rate_ctrl_alg(local,
1001 hw->rate_control_algorithm);
1002 if (result < 0) {
1003 wiphy_debug(local->hw.wiphy,
1004 "Failed to initialize rate control algorithm\n");
1005 goto fail_rate;
1006 }
1007
1008 /* add one default STA interface if supported */
1009 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1010 result = ieee80211_if_add(local, "wlan%d", NULL,
1011 NL80211_IFTYPE_STATION, NULL);
1012 if (result)
1013 wiphy_warn(local->hw.wiphy,
1014 "Failed to add default virtual iface\n");
1015 }
1016
1017 rtnl_unlock();
1018
1019 local->network_latency_notifier.notifier_call =
1020 ieee80211_max_network_latency;
1021 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1022 &local->network_latency_notifier);
1023 if (result) {
1024 rtnl_lock();
1025 goto fail_pm_qos;
1026 }
1027
1028 #ifdef CONFIG_INET
1029 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1030 result = register_inetaddr_notifier(&local->ifa_notifier);
1031 if (result)
1032 goto fail_ifa;
1033 #endif
1034
1035 #if IS_ENABLED(CONFIG_IPV6)
1036 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1037 result = register_inet6addr_notifier(&local->ifa6_notifier);
1038 if (result)
1039 goto fail_ifa6;
1040 #endif
1041
1042 return 0;
1043
1044 #if IS_ENABLED(CONFIG_IPV6)
1045 fail_ifa6:
1046 #ifdef CONFIG_INET
1047 unregister_inetaddr_notifier(&local->ifa_notifier);
1048 #endif
1049 #endif
1050 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1051 fail_ifa:
1052 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1053 &local->network_latency_notifier);
1054 rtnl_lock();
1055 #endif
1056 fail_pm_qos:
1057 ieee80211_led_exit(local);
1058 ieee80211_remove_interfaces(local);
1059 fail_rate:
1060 rtnl_unlock();
1061 ieee80211_wep_free(local);
1062 sta_info_stop(local);
1063 destroy_workqueue(local->workqueue);
1064 fail_workqueue:
1065 wiphy_unregister(local->hw.wiphy);
1066 fail_wiphy_register:
1067 if (local->wiphy_ciphers_allocated)
1068 kfree(local->hw.wiphy->cipher_suites);
1069 kfree(local->int_scan_req);
1070 return result;
1071 }
1072 EXPORT_SYMBOL(ieee80211_register_hw);
1073
1074 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1075 {
1076 struct ieee80211_local *local = hw_to_local(hw);
1077
1078 tasklet_kill(&local->tx_pending_tasklet);
1079 tasklet_kill(&local->tasklet);
1080
1081 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1082 &local->network_latency_notifier);
1083 #ifdef CONFIG_INET
1084 unregister_inetaddr_notifier(&local->ifa_notifier);
1085 #endif
1086 #if IS_ENABLED(CONFIG_IPV6)
1087 unregister_inet6addr_notifier(&local->ifa6_notifier);
1088 #endif
1089
1090 rtnl_lock();
1091
1092 /*
1093 * At this point, interface list manipulations are fine
1094 * because the driver cannot be handing us frames any
1095 * more and the tasklet is killed.
1096 */
1097 ieee80211_remove_interfaces(local);
1098
1099 rtnl_unlock();
1100
1101 cancel_work_sync(&local->restart_work);
1102 cancel_work_sync(&local->reconfig_filter);
1103 flush_work(&local->sched_scan_stopped_work);
1104
1105 ieee80211_clear_tx_pending(local);
1106 rate_control_deinitialize(local);
1107
1108 if (skb_queue_len(&local->skb_queue) ||
1109 skb_queue_len(&local->skb_queue_unreliable))
1110 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1111 skb_queue_purge(&local->skb_queue);
1112 skb_queue_purge(&local->skb_queue_unreliable);
1113
1114 destroy_workqueue(local->workqueue);
1115 wiphy_unregister(local->hw.wiphy);
1116 sta_info_stop(local);
1117 ieee80211_wep_free(local);
1118 ieee80211_led_exit(local);
1119 kfree(local->int_scan_req);
1120 }
1121 EXPORT_SYMBOL(ieee80211_unregister_hw);
1122
1123 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1124 {
1125 WARN_ONCE(1, "Have pending ack frames!\n");
1126 kfree_skb(p);
1127 return 0;
1128 }
1129
1130 void ieee80211_free_hw(struct ieee80211_hw *hw)
1131 {
1132 struct ieee80211_local *local = hw_to_local(hw);
1133
1134 mutex_destroy(&local->iflist_mtx);
1135 mutex_destroy(&local->mtx);
1136
1137 if (local->wiphy_ciphers_allocated)
1138 kfree(local->hw.wiphy->cipher_suites);
1139
1140 idr_for_each(&local->ack_status_frames,
1141 ieee80211_free_ack_frame, NULL);
1142 idr_destroy(&local->ack_status_frames);
1143
1144 kfree(rcu_access_pointer(local->tx_latency));
1145
1146 wiphy_free(local->hw.wiphy);
1147 }
1148 EXPORT_SYMBOL(ieee80211_free_hw);
1149
1150 static int __init ieee80211_init(void)
1151 {
1152 struct sk_buff *skb;
1153 int ret;
1154
1155 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1156 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1157 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1158
1159 ret = rc80211_minstrel_init();
1160 if (ret)
1161 return ret;
1162
1163 ret = rc80211_minstrel_ht_init();
1164 if (ret)
1165 goto err_minstrel;
1166
1167 ret = rc80211_pid_init();
1168 if (ret)
1169 goto err_pid;
1170
1171 ret = ieee80211_iface_init();
1172 if (ret)
1173 goto err_netdev;
1174
1175 return 0;
1176 err_netdev:
1177 rc80211_pid_exit();
1178 err_pid:
1179 rc80211_minstrel_ht_exit();
1180 err_minstrel:
1181 rc80211_minstrel_exit();
1182
1183 return ret;
1184 }
1185
1186 static void __exit ieee80211_exit(void)
1187 {
1188 rc80211_pid_exit();
1189 rc80211_minstrel_ht_exit();
1190 rc80211_minstrel_exit();
1191
1192 ieee80211s_stop();
1193
1194 ieee80211_iface_exit();
1195
1196 rcu_barrier();
1197 }
1198
1199
1200 subsys_initcall(ieee80211_init);
1201 module_exit(ieee80211_exit);
1202
1203 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1204 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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