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hpsa: fix bad -ENOMEM return value in hpsa_big_passthru_ioctl
[linux/fpc-iii.git] / net / mac80211 / main.c
blob2c5f21c7857f2cb2724a53ad04c6dfd5649e9bc0
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)
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 mutex_lock(&local->mtx);
256 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
257 rcu_dereference_protected(local->sched_scan_sdata,
258 lockdep_is_held(&local->mtx)),
259 "%s called with hardware scan in progress\n", __func__);
260 mutex_unlock(&local->mtx);
261
262 rtnl_lock();
263 ieee80211_scan_cancel(local);
264 ieee80211_reconfig(local);
265 rtnl_unlock();
266 }
267
268 void ieee80211_restart_hw(struct ieee80211_hw *hw)
269 {
270 struct ieee80211_local *local = hw_to_local(hw);
271
272 trace_api_restart_hw(local);
273
274 wiphy_info(hw->wiphy,
275 "Hardware restart was requested\n");
276
277 /* use this reason, ieee80211_reconfig will unblock it */
278 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
279 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
280
281 /*
282 * Stop all Rx during the reconfig. We don't want state changes
283 * or driver callbacks while this is in progress.
284 */
285 local->in_reconfig = true;
286 barrier();
287
288 schedule_work(&local->restart_work);
289 }
290 EXPORT_SYMBOL(ieee80211_restart_hw);
291
292 #ifdef CONFIG_INET
293 static int ieee80211_ifa_changed(struct notifier_block *nb,
294 unsigned long data, void *arg)
295 {
296 struct in_ifaddr *ifa = arg;
297 struct ieee80211_local *local =
298 container_of(nb, struct ieee80211_local,
299 ifa_notifier);
300 struct net_device *ndev = ifa->ifa_dev->dev;
301 struct wireless_dev *wdev = ndev->ieee80211_ptr;
302 struct in_device *idev;
303 struct ieee80211_sub_if_data *sdata;
304 struct ieee80211_bss_conf *bss_conf;
305 struct ieee80211_if_managed *ifmgd;
306 int c = 0;
307
308 /* Make sure it's our interface that got changed */
309 if (!wdev)
310 return NOTIFY_DONE;
311
312 if (wdev->wiphy != local->hw.wiphy)
313 return NOTIFY_DONE;
314
315 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
316 bss_conf = &sdata->vif.bss_conf;
317
318 /* ARP filtering is only supported in managed mode */
319 if (sdata->vif.type != NL80211_IFTYPE_STATION)
320 return NOTIFY_DONE;
321
322 idev = __in_dev_get_rtnl(sdata->dev);
323 if (!idev)
324 return NOTIFY_DONE;
325
326 ifmgd = &sdata->u.mgd;
327 sdata_lock(sdata);
328
329 /* Copy the addresses to the bss_conf list */
330 ifa = idev->ifa_list;
331 while (ifa) {
332 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
333 bss_conf->arp_addr_list[c] = ifa->ifa_address;
334 ifa = ifa->ifa_next;
335 c++;
336 }
337
338 bss_conf->arp_addr_cnt = c;
339
340 /* Configure driver only if associated (which also implies it is up) */
341 if (ifmgd->associated)
342 ieee80211_bss_info_change_notify(sdata,
343 BSS_CHANGED_ARP_FILTER);
344
345 sdata_unlock(sdata);
346
347 return NOTIFY_DONE;
348 }
349 #endif
350
351 #if IS_ENABLED(CONFIG_IPV6)
352 static int ieee80211_ifa6_changed(struct notifier_block *nb,
353 unsigned long data, void *arg)
354 {
355 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
356 struct inet6_dev *idev = ifa->idev;
357 struct net_device *ndev = ifa->idev->dev;
358 struct ieee80211_local *local =
359 container_of(nb, struct ieee80211_local, ifa6_notifier);
360 struct wireless_dev *wdev = ndev->ieee80211_ptr;
361 struct ieee80211_sub_if_data *sdata;
362
363 /* Make sure it's our interface that got changed */
364 if (!wdev || wdev->wiphy != local->hw.wiphy)
365 return NOTIFY_DONE;
366
367 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
368
369 /*
370 * For now only support station mode. This is mostly because
371 * doing AP would have to handle AP_VLAN in some way ...
372 */
373 if (sdata->vif.type != NL80211_IFTYPE_STATION)
374 return NOTIFY_DONE;
375
376 drv_ipv6_addr_change(local, sdata, idev);
377
378 return NOTIFY_DONE;
379 }
380 #endif
381
382 /* There isn't a lot of sense in it, but you can transmit anything you like */
383 static const struct ieee80211_txrx_stypes
384 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
385 [NL80211_IFTYPE_ADHOC] = {
386 .tx = 0xffff,
387 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
388 BIT(IEEE80211_STYPE_AUTH >> 4) |
389 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
390 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
391 },
392 [NL80211_IFTYPE_STATION] = {
393 .tx = 0xffff,
394 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
395 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
396 },
397 [NL80211_IFTYPE_AP] = {
398 .tx = 0xffff,
399 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
400 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
401 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
402 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
403 BIT(IEEE80211_STYPE_AUTH >> 4) |
404 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
405 BIT(IEEE80211_STYPE_ACTION >> 4),
406 },
407 [NL80211_IFTYPE_AP_VLAN] = {
408 /* copy AP */
409 .tx = 0xffff,
410 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
411 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
412 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
413 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
414 BIT(IEEE80211_STYPE_AUTH >> 4) |
415 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
416 BIT(IEEE80211_STYPE_ACTION >> 4),
417 },
418 [NL80211_IFTYPE_P2P_CLIENT] = {
419 .tx = 0xffff,
420 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
421 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
422 },
423 [NL80211_IFTYPE_P2P_GO] = {
424 .tx = 0xffff,
425 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
426 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
428 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
429 BIT(IEEE80211_STYPE_AUTH >> 4) |
430 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
431 BIT(IEEE80211_STYPE_ACTION >> 4),
432 },
433 [NL80211_IFTYPE_MESH_POINT] = {
434 .tx = 0xffff,
435 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
436 BIT(IEEE80211_STYPE_AUTH >> 4) |
437 BIT(IEEE80211_STYPE_DEAUTH >> 4),
438 },
439 [NL80211_IFTYPE_P2P_DEVICE] = {
440 .tx = 0xffff,
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
442 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
443 },
444 };
445
446 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
447 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
448 IEEE80211_HT_AMPDU_PARM_DENSITY,
449
450 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
451 IEEE80211_HT_CAP_MAX_AMSDU |
452 IEEE80211_HT_CAP_SGI_20 |
453 IEEE80211_HT_CAP_SGI_40),
454 .mcs = {
455 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
456 0xff, 0xff, 0xff, 0xff, 0xff, },
457 },
458 };
459
460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
461 .vht_cap_info =
462 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
463 IEEE80211_VHT_CAP_SHORT_GI_80 |
464 IEEE80211_VHT_CAP_SHORT_GI_160 |
465 IEEE80211_VHT_CAP_RXSTBC_1 |
466 IEEE80211_VHT_CAP_RXSTBC_2 |
467 IEEE80211_VHT_CAP_RXSTBC_3 |
468 IEEE80211_VHT_CAP_RXSTBC_4 |
469 IEEE80211_VHT_CAP_TXSTBC |
470 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
471 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
472 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
473 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
474 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
475 .supp_mcs = {
476 .rx_mcs_map = cpu_to_le16(~0),
477 .tx_mcs_map = cpu_to_le16(~0),
478 },
479 };
480
481 static const u8 extended_capabilities[] = {
482 0, 0, 0, 0, 0, 0, 0,
483 WLAN_EXT_CAPA8_OPMODE_NOTIF,
484 };
485
486 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
487 const struct ieee80211_ops *ops)
488 {
489 struct ieee80211_local *local;
490 int priv_size, i;
491 struct wiphy *wiphy;
492 bool use_chanctx;
493
494 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
495 !ops->add_interface || !ops->remove_interface ||
496 !ops->configure_filter))
497 return NULL;
498
499 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
500 return NULL;
501
502 /* check all or no channel context operations exist */
503 i = !!ops->add_chanctx + !!ops->remove_chanctx +
504 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
505 !!ops->unassign_vif_chanctx;
506 if (WARN_ON(i != 0 && i != 5))
507 return NULL;
508 use_chanctx = i == 5;
509
510 /* Ensure 32-byte alignment of our private data and hw private data.
511 * We use the wiphy priv data for both our ieee80211_local and for
512 * the driver's private data
513 *
514 * In memory it'll be like this:
515 *
516 * +-------------------------+
517 * | struct wiphy |
518 * +-------------------------+
519 * | struct ieee80211_local |
520 * +-------------------------+
521 * | driver's private data |
522 * +-------------------------+
523 *
524 */
525 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
526
527 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
528
529 if (!wiphy)
530 return NULL;
531
532 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
533
534 wiphy->privid = mac80211_wiphy_privid;
535
536 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
537 WIPHY_FLAG_4ADDR_AP |
538 WIPHY_FLAG_4ADDR_STATION |
539 WIPHY_FLAG_REPORTS_OBSS |
540 WIPHY_FLAG_OFFCHAN_TX;
541
542 wiphy->extended_capabilities = extended_capabilities;
543 wiphy->extended_capabilities_mask = extended_capabilities;
544 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
545
546 if (ops->remain_on_channel)
547 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
548
549 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
550 NL80211_FEATURE_SAE |
551 NL80211_FEATURE_HT_IBSS |
552 NL80211_FEATURE_VIF_TXPOWER |
553 NL80211_FEATURE_USERSPACE_MPM;
554
555 if (!ops->hw_scan)
556 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
557 NL80211_FEATURE_AP_SCAN;
558
559
560 if (!ops->set_key)
561 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
562
563 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
564
565 local = wiphy_priv(wiphy);
566
567 local->hw.wiphy = wiphy;
568
569 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
570
571 local->ops = ops;
572 local->use_chanctx = use_chanctx;
573
574 /* set up some defaults */
575 local->hw.queues = 1;
576 local->hw.max_rates = 1;
577 local->hw.max_report_rates = 0;
578 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
580 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
581 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
582 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
583 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
584 IEEE80211_RADIOTAP_MCS_HAVE_GI |
585 IEEE80211_RADIOTAP_MCS_HAVE_BW;
586 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
587 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
588 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
589 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
590 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
591 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
592 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
593
594 INIT_LIST_HEAD(&local->interfaces);
595
596 __hw_addr_init(&local->mc_list);
597
598 mutex_init(&local->iflist_mtx);
599 mutex_init(&local->mtx);
600
601 mutex_init(&local->key_mtx);
602 spin_lock_init(&local->filter_lock);
603 spin_lock_init(&local->rx_path_lock);
604 spin_lock_init(&local->queue_stop_reason_lock);
605
606 INIT_LIST_HEAD(&local->chanctx_list);
607 mutex_init(&local->chanctx_mtx);
608
609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
610
611 INIT_WORK(&local->restart_work, ieee80211_restart_work);
612
613 INIT_WORK(&local->radar_detected_work,
614 ieee80211_dfs_radar_detected_work);
615
616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617 local->smps_mode = IEEE80211_SMPS_OFF;
618
619 INIT_WORK(&local->dynamic_ps_enable_work,
620 ieee80211_dynamic_ps_enable_work);
621 INIT_WORK(&local->dynamic_ps_disable_work,
622 ieee80211_dynamic_ps_disable_work);
623 setup_timer(&local->dynamic_ps_timer,
624 ieee80211_dynamic_ps_timer, (unsigned long) local);
625
626 INIT_WORK(&local->sched_scan_stopped_work,
627 ieee80211_sched_scan_stopped_work);
628
629 spin_lock_init(&local->ack_status_lock);
630 idr_init(&local->ack_status_frames);
631
632 sta_info_init(local);
633
634 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
635 skb_queue_head_init(&local->pending[i]);
636 atomic_set(&local->agg_queue_stop[i], 0);
637 }
638 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
639 (unsigned long)local);
640
641 tasklet_init(&local->tasklet,
642 ieee80211_tasklet_handler,
643 (unsigned long) local);
644
645 skb_queue_head_init(&local->skb_queue);
646 skb_queue_head_init(&local->skb_queue_unreliable);
647
648 ieee80211_led_names(local);
649
650 ieee80211_roc_setup(local);
651
652 return &local->hw;
653 }
654 EXPORT_SYMBOL(ieee80211_alloc_hw);
655
656 int ieee80211_register_hw(struct ieee80211_hw *hw)
657 {
658 struct ieee80211_local *local = hw_to_local(hw);
659 int result, i;
660 enum ieee80211_band band;
661 int channels, max_bitrates;
662 bool supp_ht, supp_vht;
663 netdev_features_t feature_whitelist;
664 struct cfg80211_chan_def dflt_chandef = {};
665 static const u32 cipher_suites[] = {
666 /* keep WEP first, it may be removed below */
667 WLAN_CIPHER_SUITE_WEP40,
668 WLAN_CIPHER_SUITE_WEP104,
669 WLAN_CIPHER_SUITE_TKIP,
670 WLAN_CIPHER_SUITE_CCMP,
671
672 /* keep last -- depends on hw flags! */
673 WLAN_CIPHER_SUITE_AES_CMAC
674 };
675
676 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
677 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
678 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
679 return -EINVAL;
680
681 #ifdef CONFIG_PM
682 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
683 return -EINVAL;
684 #endif
685
686 if (!local->use_chanctx) {
687 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
688 const struct ieee80211_iface_combination *comb;
689
690 comb = &local->hw.wiphy->iface_combinations[i];
691
692 if (comb->num_different_channels > 1)
693 return -EINVAL;
694 }
695 } else {
696 /*
697 * WDS is currently prohibited when channel contexts are used
698 * because there's no clear definition of which channel WDS
699 * type interfaces use
700 */
701 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
702 return -EINVAL;
703
704 /* DFS currently not supported with channel context drivers */
705 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
706 const struct ieee80211_iface_combination *comb;
707
708 comb = &local->hw.wiphy->iface_combinations[i];
709
710 if (comb->radar_detect_widths)
711 return -EINVAL;
712 }
713 }
714
715 /* Only HW csum features are currently compatible with mac80211 */
716 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
717 NETIF_F_HW_CSUM;
718 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
719 return -EINVAL;
720
721 if (hw->max_report_rates == 0)
722 hw->max_report_rates = hw->max_rates;
723
724 local->rx_chains = 1;
725
726 /*
727 * generic code guarantees at least one band,
728 * set this very early because much code assumes
729 * that hw.conf.channel is assigned
730 */
731 channels = 0;
732 max_bitrates = 0;
733 supp_ht = false;
734 supp_vht = false;
735 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
736 struct ieee80211_supported_band *sband;
737
738 sband = local->hw.wiphy->bands[band];
739 if (!sband)
740 continue;
741
742 if (!dflt_chandef.chan) {
743 cfg80211_chandef_create(&dflt_chandef,
744 &sband->channels[0],
745 NL80211_CHAN_NO_HT);
746 /* init channel we're on */
747 if (!local->use_chanctx && !local->_oper_chandef.chan) {
748 local->hw.conf.chandef = dflt_chandef;
749 local->_oper_chandef = dflt_chandef;
750 }
751 local->monitor_chandef = dflt_chandef;
752 }
753
754 channels += sband->n_channels;
755
756 if (max_bitrates < sband->n_bitrates)
757 max_bitrates = sband->n_bitrates;
758 supp_ht = supp_ht || sband->ht_cap.ht_supported;
759 supp_vht = supp_vht || sband->vht_cap.vht_supported;
760
761 if (sband->ht_cap.ht_supported)
762 local->rx_chains =
763 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
764 local->rx_chains);
765
766 /* TODO: consider VHT for RX chains, hopefully it's the same */
767 }
768
769 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
770 sizeof(void *) * channels, GFP_KERNEL);
771 if (!local->int_scan_req)
772 return -ENOMEM;
773
774 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
775 if (!local->hw.wiphy->bands[band])
776 continue;
777 local->int_scan_req->rates[band] = (u32) -1;
778 }
779
780 /* if low-level driver supports AP, we also support VLAN */
781 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
782 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
783 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
784 }
785
786 /* mac80211 always supports monitor */
787 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
788 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
789
790 /* mac80211 doesn't support more than one IBSS interface right now */
791 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
792 const struct ieee80211_iface_combination *c;
793 int j;
794
795 c = &hw->wiphy->iface_combinations[i];
796
797 for (j = 0; j < c->n_limits; j++)
798 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
799 c->limits[j].max > 1)
800 return -EINVAL;
801 }
802
803 #ifndef CONFIG_MAC80211_MESH
804 /* mesh depends on Kconfig, but drivers should set it if they want */
805 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
806 #endif
807
808 /* if the underlying driver supports mesh, mac80211 will (at least)
809 * provide routing of mesh authentication frames to userspace */
810 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
811 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
812
813 /* mac80211 supports control port protocol changing */
814 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
815
816 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
817 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
818 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
819 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
820
821 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
822 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
823 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
824
825 /*
826 * Calculate scan IE length -- we need this to alloc
827 * memory and to subtract from the driver limit. It
828 * includes the DS Params, (extended) supported rates, and HT
829 * information -- SSID is the driver's responsibility.
830 */
831 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
832 3 /* DS Params */;
833 if (supp_ht)
834 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
835
836 if (supp_vht)
837 local->scan_ies_len +=
838 2 + sizeof(struct ieee80211_vht_cap);
839
840 if (!local->ops->hw_scan) {
841 /* For hw_scan, driver needs to set these up. */
842 local->hw.wiphy->max_scan_ssids = 4;
843 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
844 }
845
846 /*
847 * If the driver supports any scan IEs, then assume the
848 * limit includes the IEs mac80211 will add, otherwise
849 * leave it at zero and let the driver sort it out; we
850 * still pass our IEs to the driver but userspace will
851 * not be allowed to in that case.
852 */
853 if (local->hw.wiphy->max_scan_ie_len)
854 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
855
856 /* Set up cipher suites unless driver already did */
857 if (!local->hw.wiphy->cipher_suites) {
858 local->hw.wiphy->cipher_suites = cipher_suites;
859 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
860 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
861 local->hw.wiphy->n_cipher_suites--;
862 }
863 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
864 if (local->hw.wiphy->cipher_suites == cipher_suites) {
865 local->hw.wiphy->cipher_suites += 2;
866 local->hw.wiphy->n_cipher_suites -= 2;
867 } else {
868 u32 *suites;
869 int r, w = 0;
870
871 /* Filter out WEP */
872
873 suites = kmemdup(
874 local->hw.wiphy->cipher_suites,
875 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
876 GFP_KERNEL);
877 if (!suites) {
878 result = -ENOMEM;
879 goto fail_wiphy_register;
880 }
881 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
882 u32 suite = local->hw.wiphy->cipher_suites[r];
883 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
884 suite == WLAN_CIPHER_SUITE_WEP104)
885 continue;
886 suites[w++] = suite;
887 }
888 local->hw.wiphy->cipher_suites = suites;
889 local->hw.wiphy->n_cipher_suites = w;
890 local->wiphy_ciphers_allocated = true;
891 }
892 }
893
894 if (!local->ops->remain_on_channel)
895 local->hw.wiphy->max_remain_on_channel_duration = 5000;
896
897 /* mac80211 based drivers don't support internal TDLS setup */
898 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
899 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
900
901 result = wiphy_register(local->hw.wiphy);
902 if (result < 0)
903 goto fail_wiphy_register;
904
905 /*
906 * We use the number of queues for feature tests (QoS, HT) internally
907 * so restrict them appropriately.
908 */
909 if (hw->queues > IEEE80211_MAX_QUEUES)
910 hw->queues = IEEE80211_MAX_QUEUES;
911
912 local->workqueue =
913 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
914 if (!local->workqueue) {
915 result = -ENOMEM;
916 goto fail_workqueue;
917 }
918
919 /*
920 * The hardware needs headroom for sending the frame,
921 * and we need some headroom for passing the frame to monitor
922 * interfaces, but never both at the same time.
923 */
924 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
925 IEEE80211_TX_STATUS_HEADROOM);
926
927 debugfs_hw_add(local);
928
929 /*
930 * if the driver doesn't specify a max listen interval we
931 * use 5 which should be a safe default
932 */
933 if (local->hw.max_listen_interval == 0)
934 local->hw.max_listen_interval = 5;
935
936 local->hw.conf.listen_interval = local->hw.max_listen_interval;
937
938 local->dynamic_ps_forced_timeout = -1;
939
940 result = ieee80211_wep_init(local);
941 if (result < 0)
942 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
943 result);
944
945 ieee80211_led_init(local);
946
947 rtnl_lock();
948
949 result = ieee80211_init_rate_ctrl_alg(local,
950 hw->rate_control_algorithm);
951 if (result < 0) {
952 wiphy_debug(local->hw.wiphy,
953 "Failed to initialize rate control algorithm\n");
954 goto fail_rate;
955 }
956
957 /* add one default STA interface if supported */
958 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
959 result = ieee80211_if_add(local, "wlan%d", NULL,
960 NL80211_IFTYPE_STATION, NULL);
961 if (result)
962 wiphy_warn(local->hw.wiphy,
963 "Failed to add default virtual iface\n");
964 }
965
966 rtnl_unlock();
967
968 local->network_latency_notifier.notifier_call =
969 ieee80211_max_network_latency;
970 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
971 &local->network_latency_notifier);
972 if (result) {
973 rtnl_lock();
974 goto fail_pm_qos;
975 }
976
977 #ifdef CONFIG_INET
978 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
979 result = register_inetaddr_notifier(&local->ifa_notifier);
980 if (result)
981 goto fail_ifa;
982 #endif
983
984 #if IS_ENABLED(CONFIG_IPV6)
985 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
986 result = register_inet6addr_notifier(&local->ifa6_notifier);
987 if (result)
988 goto fail_ifa6;
989 #endif
990
991 return 0;
992
993 #if IS_ENABLED(CONFIG_IPV6)
994 fail_ifa6:
995 #ifdef CONFIG_INET
996 unregister_inetaddr_notifier(&local->ifa_notifier);
997 #endif
998 #endif
999 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1000 fail_ifa:
1001 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1002 &local->network_latency_notifier);
1003 rtnl_lock();
1004 #endif
1005 fail_pm_qos:
1006 ieee80211_led_exit(local);
1007 ieee80211_remove_interfaces(local);
1008 fail_rate:
1009 rtnl_unlock();
1010 ieee80211_wep_free(local);
1011 sta_info_stop(local);
1012 destroy_workqueue(local->workqueue);
1013 fail_workqueue:
1014 wiphy_unregister(local->hw.wiphy);
1015 fail_wiphy_register:
1016 if (local->wiphy_ciphers_allocated)
1017 kfree(local->hw.wiphy->cipher_suites);
1018 kfree(local->int_scan_req);
1019 return result;
1020 }
1021 EXPORT_SYMBOL(ieee80211_register_hw);
1022
1023 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1024 {
1025 struct ieee80211_local *local = hw_to_local(hw);
1026
1027 tasklet_kill(&local->tx_pending_tasklet);
1028 tasklet_kill(&local->tasklet);
1029
1030 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1031 &local->network_latency_notifier);
1032 #ifdef CONFIG_INET
1033 unregister_inetaddr_notifier(&local->ifa_notifier);
1034 #endif
1035 #if IS_ENABLED(CONFIG_IPV6)
1036 unregister_inet6addr_notifier(&local->ifa6_notifier);
1037 #endif
1038
1039 rtnl_lock();
1040
1041 /*
1042 * At this point, interface list manipulations are fine
1043 * because the driver cannot be handing us frames any
1044 * more and the tasklet is killed.
1045 */
1046 ieee80211_remove_interfaces(local);
1047
1048 rtnl_unlock();
1049
1050 cancel_work_sync(&local->restart_work);
1051 cancel_work_sync(&local->reconfig_filter);
1052 flush_work(&local->sched_scan_stopped_work);
1053
1054 ieee80211_clear_tx_pending(local);
1055 rate_control_deinitialize(local);
1056
1057 if (skb_queue_len(&local->skb_queue) ||
1058 skb_queue_len(&local->skb_queue_unreliable))
1059 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1060 skb_queue_purge(&local->skb_queue);
1061 skb_queue_purge(&local->skb_queue_unreliable);
1062
1063 destroy_workqueue(local->workqueue);
1064 wiphy_unregister(local->hw.wiphy);
1065 sta_info_stop(local);
1066 ieee80211_wep_free(local);
1067 ieee80211_led_exit(local);
1068 kfree(local->int_scan_req);
1069 }
1070 EXPORT_SYMBOL(ieee80211_unregister_hw);
1071
1072 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1073 {
1074 WARN_ONCE(1, "Have pending ack frames!\n");
1075 kfree_skb(p);
1076 return 0;
1077 }
1078
1079 void ieee80211_free_hw(struct ieee80211_hw *hw)
1080 {
1081 struct ieee80211_local *local = hw_to_local(hw);
1082
1083 mutex_destroy(&local->iflist_mtx);
1084 mutex_destroy(&local->mtx);
1085
1086 if (local->wiphy_ciphers_allocated)
1087 kfree(local->hw.wiphy->cipher_suites);
1088
1089 idr_for_each(&local->ack_status_frames,
1090 ieee80211_free_ack_frame, NULL);
1091 idr_destroy(&local->ack_status_frames);
1092
1093 wiphy_free(local->hw.wiphy);
1094 }
1095 EXPORT_SYMBOL(ieee80211_free_hw);
1096
1097 static int __init ieee80211_init(void)
1098 {
1099 struct sk_buff *skb;
1100 int ret;
1101
1102 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1103 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1104 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1105
1106 ret = rc80211_minstrel_init();
1107 if (ret)
1108 return ret;
1109
1110 ret = rc80211_minstrel_ht_init();
1111 if (ret)
1112 goto err_minstrel;
1113
1114 ret = rc80211_pid_init();
1115 if (ret)
1116 goto err_pid;
1117
1118 ret = ieee80211_iface_init();
1119 if (ret)
1120 goto err_netdev;
1121
1122 return 0;
1123 err_netdev:
1124 rc80211_pid_exit();
1125 err_pid:
1126 rc80211_minstrel_ht_exit();
1127 err_minstrel:
1128 rc80211_minstrel_exit();
1129
1130 return ret;
1131 }
1132
1133 static void __exit ieee80211_exit(void)
1134 {
1135 rc80211_pid_exit();
1136 rc80211_minstrel_ht_exit();
1137 rc80211_minstrel_exit();
1138
1139 ieee80211s_stop();
1140
1141 ieee80211_iface_exit();
1142
1143 rcu_barrier();
1144 }
1145
1146
1147 subsys_initcall(ieee80211_init);
1148 module_exit(ieee80211_exit);
1149
1150 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1151 MODULE_LICENSE("GPL");
Linux with added FPC-III support