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Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / net / mac80211 / main.c
blobd17c26d6e369f8db71061f3c73f4f27196ed9e3d
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 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
152 continue;
153 power = min(power, sdata->vif.bss_conf.txpower);
154 }
155 rcu_read_unlock();
156
157 if (local->hw.conf.power_level != power) {
158 changed |= IEEE80211_CONF_CHANGE_POWER;
159 local->hw.conf.power_level = power;
160 }
161
162 return changed;
163 }
164
165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
166 {
167 int ret = 0;
168
169 might_sleep();
170
171 if (!local->use_chanctx)
172 changed |= ieee80211_hw_conf_chan(local);
173 else
174 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
175 IEEE80211_CONF_CHANGE_POWER);
176
177 if (changed && local->open_count) {
178 ret = drv_config(local, changed);
179 /*
180 * Goal:
181 * HW reconfiguration should never fail, the driver has told
182 * us what it can support so it should live up to that promise.
183 *
184 * Current status:
185 * rfkill is not integrated with mac80211 and a
186 * configuration command can thus fail if hardware rfkill
187 * is enabled
188 *
189 * FIXME: integrate rfkill with mac80211 and then add this
190 * WARN_ON() back
191 *
192 */
193 /* WARN_ON(ret); */
194 }
195
196 return ret;
197 }
198
199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
200 u32 changed)
201 {
202 struct ieee80211_local *local = sdata->local;
203
204 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
205 return;
206
207 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
208 }
209
210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
211 {
212 sdata->vif.bss_conf.use_cts_prot = false;
213 sdata->vif.bss_conf.use_short_preamble = false;
214 sdata->vif.bss_conf.use_short_slot = false;
215 return BSS_CHANGED_ERP_CTS_PROT |
216 BSS_CHANGED_ERP_PREAMBLE |
217 BSS_CHANGED_ERP_SLOT;
218 }
219
220 static void ieee80211_tasklet_handler(unsigned long data)
221 {
222 struct ieee80211_local *local = (struct ieee80211_local *) data;
223 struct sk_buff *skb;
224
225 while ((skb = skb_dequeue(&local->skb_queue)) ||
226 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
227 switch (skb->pkt_type) {
228 case IEEE80211_RX_MSG:
229 /* Clear skb->pkt_type in order to not confuse kernel
230 * netstack. */
231 skb->pkt_type = 0;
232 ieee80211_rx(&local->hw, skb);
233 break;
234 case IEEE80211_TX_STATUS_MSG:
235 skb->pkt_type = 0;
236 ieee80211_tx_status(&local->hw, skb);
237 break;
238 default:
239 WARN(1, "mac80211: Packet is of unknown type %d\n",
240 skb->pkt_type);
241 dev_kfree_skb(skb);
242 break;
243 }
244 }
245 }
246
247 static void ieee80211_restart_work(struct work_struct *work)
248 {
249 struct ieee80211_local *local =
250 container_of(work, struct ieee80211_local, restart_work);
251
252 /* wait for scan work complete */
253 flush_workqueue(local->workqueue);
254
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
257
258 rtnl_lock();
259 ieee80211_scan_cancel(local);
260 ieee80211_reconfig(local);
261 rtnl_unlock();
262 }
263
264 void ieee80211_restart_hw(struct ieee80211_hw *hw)
265 {
266 struct ieee80211_local *local = hw_to_local(hw);
267
268 trace_api_restart_hw(local);
269
270 wiphy_info(hw->wiphy,
271 "Hardware restart was requested\n");
272
273 /* use this reason, ieee80211_reconfig will unblock it */
274 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
275 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
276
277 /*
278 * Stop all Rx during the reconfig. We don't want state changes
279 * or driver callbacks while this is in progress.
280 */
281 local->in_reconfig = true;
282 barrier();
283
284 schedule_work(&local->restart_work);
285 }
286 EXPORT_SYMBOL(ieee80211_restart_hw);
287
288 #ifdef CONFIG_INET
289 static int ieee80211_ifa_changed(struct notifier_block *nb,
290 unsigned long data, void *arg)
291 {
292 struct in_ifaddr *ifa = arg;
293 struct ieee80211_local *local =
294 container_of(nb, struct ieee80211_local,
295 ifa_notifier);
296 struct net_device *ndev = ifa->ifa_dev->dev;
297 struct wireless_dev *wdev = ndev->ieee80211_ptr;
298 struct in_device *idev;
299 struct ieee80211_sub_if_data *sdata;
300 struct ieee80211_bss_conf *bss_conf;
301 struct ieee80211_if_managed *ifmgd;
302 int c = 0;
303
304 /* Make sure it's our interface that got changed */
305 if (!wdev)
306 return NOTIFY_DONE;
307
308 if (wdev->wiphy != local->hw.wiphy)
309 return NOTIFY_DONE;
310
311 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
312 bss_conf = &sdata->vif.bss_conf;
313
314 /* ARP filtering is only supported in managed mode */
315 if (sdata->vif.type != NL80211_IFTYPE_STATION)
316 return NOTIFY_DONE;
317
318 idev = __in_dev_get_rtnl(sdata->dev);
319 if (!idev)
320 return NOTIFY_DONE;
321
322 ifmgd = &sdata->u.mgd;
323 sdata_lock(sdata);
324
325 /* Copy the addresses to the bss_conf list */
326 ifa = idev->ifa_list;
327 while (ifa) {
328 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
329 bss_conf->arp_addr_list[c] = ifa->ifa_address;
330 ifa = ifa->ifa_next;
331 c++;
332 }
333
334 bss_conf->arp_addr_cnt = c;
335
336 /* Configure driver only if associated (which also implies it is up) */
337 if (ifmgd->associated)
338 ieee80211_bss_info_change_notify(sdata,
339 BSS_CHANGED_ARP_FILTER);
340
341 sdata_unlock(sdata);
342
343 return NOTIFY_OK;
344 }
345 #endif
346
347 #if IS_ENABLED(CONFIG_IPV6)
348 static int ieee80211_ifa6_changed(struct notifier_block *nb,
349 unsigned long data, void *arg)
350 {
351 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
352 struct inet6_dev *idev = ifa->idev;
353 struct net_device *ndev = ifa->idev->dev;
354 struct ieee80211_local *local =
355 container_of(nb, struct ieee80211_local, ifa6_notifier);
356 struct wireless_dev *wdev = ndev->ieee80211_ptr;
357 struct ieee80211_sub_if_data *sdata;
358
359 /* Make sure it's our interface that got changed */
360 if (!wdev || wdev->wiphy != local->hw.wiphy)
361 return NOTIFY_DONE;
362
363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
364
365 /*
366 * For now only support station mode. This is mostly because
367 * doing AP would have to handle AP_VLAN in some way ...
368 */
369 if (sdata->vif.type != NL80211_IFTYPE_STATION)
370 return NOTIFY_DONE;
371
372 drv_ipv6_addr_change(local, sdata, idev);
373
374 return NOTIFY_OK;
375 }
376 #endif
377
378 /* There isn't a lot of sense in it, but you can transmit anything you like */
379 static const struct ieee80211_txrx_stypes
380 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
381 [NL80211_IFTYPE_ADHOC] = {
382 .tx = 0xffff,
383 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
384 BIT(IEEE80211_STYPE_AUTH >> 4) |
385 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
386 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
387 },
388 [NL80211_IFTYPE_STATION] = {
389 .tx = 0xffff,
390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
392 },
393 [NL80211_IFTYPE_AP] = {
394 .tx = 0xffff,
395 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
396 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
398 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
399 BIT(IEEE80211_STYPE_AUTH >> 4) |
400 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
401 BIT(IEEE80211_STYPE_ACTION >> 4),
402 },
403 [NL80211_IFTYPE_AP_VLAN] = {
404 /* copy AP */
405 .tx = 0xffff,
406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
409 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
410 BIT(IEEE80211_STYPE_AUTH >> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412 BIT(IEEE80211_STYPE_ACTION >> 4),
413 },
414 [NL80211_IFTYPE_P2P_CLIENT] = {
415 .tx = 0xffff,
416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418 },
419 [NL80211_IFTYPE_P2P_GO] = {
420 .tx = 0xffff,
421 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
424 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
425 BIT(IEEE80211_STYPE_AUTH >> 4) |
426 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
427 BIT(IEEE80211_STYPE_ACTION >> 4),
428 },
429 [NL80211_IFTYPE_MESH_POINT] = {
430 .tx = 0xffff,
431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4),
434 },
435 [NL80211_IFTYPE_P2P_DEVICE] = {
436 .tx = 0xffff,
437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
439 },
440 };
441
442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
443 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
444 IEEE80211_HT_AMPDU_PARM_DENSITY,
445
446 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
447 IEEE80211_HT_CAP_MAX_AMSDU |
448 IEEE80211_HT_CAP_SGI_20 |
449 IEEE80211_HT_CAP_SGI_40 |
450 IEEE80211_HT_CAP_LDPC_CODING |
451 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
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 /* if low-level driver supports AP, we also support VLAN */
854 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
855 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
856 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
857 }
858
859 /* mac80211 always supports monitor */
860 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
861 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
862
863 /* mac80211 doesn't support more than one IBSS interface right now */
864 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
865 const struct ieee80211_iface_combination *c;
866 int j;
867
868 c = &hw->wiphy->iface_combinations[i];
869
870 for (j = 0; j < c->n_limits; j++)
871 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
872 c->limits[j].max > 1)
873 return -EINVAL;
874 }
875
876 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
877 sizeof(void *) * channels, GFP_KERNEL);
878 if (!local->int_scan_req)
879 return -ENOMEM;
880
881 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
882 if (!local->hw.wiphy->bands[band])
883 continue;
884 local->int_scan_req->rates[band] = (u32) -1;
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 if (hw->max_signal <= 0) {
905 result = -EINVAL;
906 goto fail_wiphy_register;
907 }
908 }
909
910 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
911 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
912 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
913
914 /*
915 * Calculate scan IE length -- we need this to alloc
916 * memory and to subtract from the driver limit. It
917 * includes the DS Params, (extended) supported rates, and HT
918 * information -- SSID is the driver's responsibility.
919 */
920 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
921 3 /* DS Params */;
922 if (supp_ht)
923 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
924
925 if (supp_vht)
926 local->scan_ies_len +=
927 2 + sizeof(struct ieee80211_vht_cap);
928
929 if (!local->ops->hw_scan) {
930 /* For hw_scan, driver needs to set these up. */
931 local->hw.wiphy->max_scan_ssids = 4;
932 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
933 }
934
935 /*
936 * If the driver supports any scan IEs, then assume the
937 * limit includes the IEs mac80211 will add, otherwise
938 * leave it at zero and let the driver sort it out; we
939 * still pass our IEs to the driver but userspace will
940 * not be allowed to in that case.
941 */
942 if (local->hw.wiphy->max_scan_ie_len)
943 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
944
945 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
946 local->hw.n_cipher_schemes));
947
948 result = ieee80211_init_cipher_suites(local);
949 if (result < 0)
950 goto fail_wiphy_register;
951
952 if (!local->ops->remain_on_channel)
953 local->hw.wiphy->max_remain_on_channel_duration = 5000;
954
955 /* mac80211 based drivers don't support internal TDLS setup */
956 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
957 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
958
959 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
960
961 result = wiphy_register(local->hw.wiphy);
962 if (result < 0)
963 goto fail_wiphy_register;
964
965 /*
966 * We use the number of queues for feature tests (QoS, HT) internally
967 * so restrict them appropriately.
968 */
969 if (hw->queues > IEEE80211_MAX_QUEUES)
970 hw->queues = IEEE80211_MAX_QUEUES;
971
972 local->workqueue =
973 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
974 if (!local->workqueue) {
975 result = -ENOMEM;
976 goto fail_workqueue;
977 }
978
979 /*
980 * The hardware needs headroom for sending the frame,
981 * and we need some headroom for passing the frame to monitor
982 * interfaces, but never both at the same time.
983 */
984 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
985 IEEE80211_TX_STATUS_HEADROOM);
986
987 debugfs_hw_add(local);
988
989 /*
990 * if the driver doesn't specify a max listen interval we
991 * use 5 which should be a safe default
992 */
993 if (local->hw.max_listen_interval == 0)
994 local->hw.max_listen_interval = 5;
995
996 local->hw.conf.listen_interval = local->hw.max_listen_interval;
997
998 local->dynamic_ps_forced_timeout = -1;
999
1000 result = ieee80211_wep_init(local);
1001 if (result < 0)
1002 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1003 result);
1004
1005 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1006
1007 ieee80211_led_init(local);
1008
1009 rtnl_lock();
1010
1011 result = ieee80211_init_rate_ctrl_alg(local,
1012 hw->rate_control_algorithm);
1013 if (result < 0) {
1014 wiphy_debug(local->hw.wiphy,
1015 "Failed to initialize rate control algorithm\n");
1016 goto fail_rate;
1017 }
1018
1019 /* add one default STA interface if supported */
1020 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1021 result = ieee80211_if_add(local, "wlan%d", NULL,
1022 NL80211_IFTYPE_STATION, NULL);
1023 if (result)
1024 wiphy_warn(local->hw.wiphy,
1025 "Failed to add default virtual iface\n");
1026 }
1027
1028 rtnl_unlock();
1029
1030 local->network_latency_notifier.notifier_call =
1031 ieee80211_max_network_latency;
1032 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1033 &local->network_latency_notifier);
1034 if (result) {
1035 rtnl_lock();
1036 goto fail_pm_qos;
1037 }
1038
1039 #ifdef CONFIG_INET
1040 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1041 result = register_inetaddr_notifier(&local->ifa_notifier);
1042 if (result)
1043 goto fail_ifa;
1044 #endif
1045
1046 #if IS_ENABLED(CONFIG_IPV6)
1047 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1048 result = register_inet6addr_notifier(&local->ifa6_notifier);
1049 if (result)
1050 goto fail_ifa6;
1051 #endif
1052
1053 return 0;
1054
1055 #if IS_ENABLED(CONFIG_IPV6)
1056 fail_ifa6:
1057 #ifdef CONFIG_INET
1058 unregister_inetaddr_notifier(&local->ifa_notifier);
1059 #endif
1060 #endif
1061 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1062 fail_ifa:
1063 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1064 &local->network_latency_notifier);
1065 rtnl_lock();
1066 #endif
1067 fail_pm_qos:
1068 ieee80211_led_exit(local);
1069 ieee80211_remove_interfaces(local);
1070 fail_rate:
1071 rtnl_unlock();
1072 ieee80211_wep_free(local);
1073 sta_info_stop(local);
1074 destroy_workqueue(local->workqueue);
1075 fail_workqueue:
1076 wiphy_unregister(local->hw.wiphy);
1077 fail_wiphy_register:
1078 if (local->wiphy_ciphers_allocated)
1079 kfree(local->hw.wiphy->cipher_suites);
1080 kfree(local->int_scan_req);
1081 return result;
1082 }
1083 EXPORT_SYMBOL(ieee80211_register_hw);
1084
1085 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1086 struct net_device *napi_dev,
1087 int (*poll)(struct napi_struct *, int),
1088 int weight)
1089 {
1090 struct ieee80211_local *local = hw_to_local(hw);
1091
1092 netif_napi_add(napi_dev, napi, poll, weight);
1093 local->napi = napi;
1094 }
1095 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1096
1097 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1098 {
1099 struct ieee80211_local *local = hw_to_local(hw);
1100
1101 tasklet_kill(&local->tx_pending_tasklet);
1102 tasklet_kill(&local->tasklet);
1103
1104 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1105 &local->network_latency_notifier);
1106 #ifdef CONFIG_INET
1107 unregister_inetaddr_notifier(&local->ifa_notifier);
1108 #endif
1109 #if IS_ENABLED(CONFIG_IPV6)
1110 unregister_inet6addr_notifier(&local->ifa6_notifier);
1111 #endif
1112
1113 rtnl_lock();
1114
1115 /*
1116 * At this point, interface list manipulations are fine
1117 * because the driver cannot be handing us frames any
1118 * more and the tasklet is killed.
1119 */
1120 ieee80211_remove_interfaces(local);
1121
1122 rtnl_unlock();
1123
1124 cancel_work_sync(&local->restart_work);
1125 cancel_work_sync(&local->reconfig_filter);
1126 flush_work(&local->sched_scan_stopped_work);
1127
1128 ieee80211_clear_tx_pending(local);
1129 rate_control_deinitialize(local);
1130
1131 if (skb_queue_len(&local->skb_queue) ||
1132 skb_queue_len(&local->skb_queue_unreliable))
1133 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1134 skb_queue_purge(&local->skb_queue);
1135 skb_queue_purge(&local->skb_queue_unreliable);
1136
1137 destroy_workqueue(local->workqueue);
1138 wiphy_unregister(local->hw.wiphy);
1139 sta_info_stop(local);
1140 ieee80211_wep_free(local);
1141 ieee80211_led_exit(local);
1142 kfree(local->int_scan_req);
1143 }
1144 EXPORT_SYMBOL(ieee80211_unregister_hw);
1145
1146 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1147 {
1148 WARN_ONCE(1, "Have pending ack frames!\n");
1149 kfree_skb(p);
1150 return 0;
1151 }
1152
1153 void ieee80211_free_hw(struct ieee80211_hw *hw)
1154 {
1155 struct ieee80211_local *local = hw_to_local(hw);
1156
1157 mutex_destroy(&local->iflist_mtx);
1158 mutex_destroy(&local->mtx);
1159
1160 if (local->wiphy_ciphers_allocated)
1161 kfree(local->hw.wiphy->cipher_suites);
1162
1163 idr_for_each(&local->ack_status_frames,
1164 ieee80211_free_ack_frame, NULL);
1165 idr_destroy(&local->ack_status_frames);
1166
1167 kfree(rcu_access_pointer(local->tx_latency));
1168
1169 wiphy_free(local->hw.wiphy);
1170 }
1171 EXPORT_SYMBOL(ieee80211_free_hw);
1172
1173 static int __init ieee80211_init(void)
1174 {
1175 struct sk_buff *skb;
1176 int ret;
1177
1178 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1179 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1180 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1181
1182 ret = rc80211_minstrel_init();
1183 if (ret)
1184 return ret;
1185
1186 ret = rc80211_minstrel_ht_init();
1187 if (ret)
1188 goto err_minstrel;
1189
1190 ret = rc80211_pid_init();
1191 if (ret)
1192 goto err_pid;
1193
1194 ret = ieee80211_iface_init();
1195 if (ret)
1196 goto err_netdev;
1197
1198 return 0;
1199 err_netdev:
1200 rc80211_pid_exit();
1201 err_pid:
1202 rc80211_minstrel_ht_exit();
1203 err_minstrel:
1204 rc80211_minstrel_exit();
1205
1206 return ret;
1207 }
1208
1209 static void __exit ieee80211_exit(void)
1210 {
1211 rc80211_pid_exit();
1212 rc80211_minstrel_ht_exit();
1213 rc80211_minstrel_exit();
1214
1215 ieee80211s_stop();
1216
1217 ieee80211_iface_exit();
1218
1219 rcu_barrier();
1220 }
1221
1222
1223 subsys_initcall(ieee80211_init);
1224 module_exit(ieee80211_exit);
1225
1226 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1227 MODULE_LICENSE("GPL");
Linux with added FPC-III support