wifi: support random mac address and save to file, solve compile warning
[firefly-linux-kernel-4.4.55.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_channel) {
106                 chandef.chan = local->scan_channel;
107                 /* If scanning on oper channel, use whatever channel-type
108                  * is currently in use.
109                  */
110                 if (chandef.chan == local->_oper_chandef.chan) {
111                         chandef = local->_oper_chandef;
112                 } else {
113                         chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
114                         chandef.center_freq1 = chandef.chan->center_freq;
115                 }
116         } else if (local->tmp_channel) {
117                 chandef.chan = local->tmp_channel;
118                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
119                 chandef.center_freq1 = chandef.chan->center_freq;
120         } else
121                 chandef = local->_oper_chandef;
122
123         WARN(!cfg80211_chandef_valid(&chandef),
124              "control:%d MHz width:%d center: %d/%d MHz",
125              chandef.chan->center_freq, chandef.width,
126              chandef.center_freq1, chandef.center_freq2);
127
128         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
129                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
130         else
131                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
132
133         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
134
135         if (offchannel_flag ||
136             !cfg80211_chandef_identical(&local->hw.conf.chandef,
137                                         &local->_oper_chandef)) {
138                 local->hw.conf.chandef = chandef;
139                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
140         }
141
142         if (!conf_is_ht(&local->hw.conf)) {
143                 /*
144                  * mac80211.h documents that this is only valid
145                  * when the channel is set to an HT type, and
146                  * that otherwise STATIC is used.
147                  */
148                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
149         } else if (local->hw.conf.smps_mode != local->smps_mode) {
150                 local->hw.conf.smps_mode = local->smps_mode;
151                 changed |= IEEE80211_CONF_CHANGE_SMPS;
152         }
153
154         power = chandef.chan->max_power;
155
156         rcu_read_lock();
157         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
158                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
159                         continue;
160                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
161                         continue;
162                 power = min(power, sdata->vif.bss_conf.txpower);
163         }
164         rcu_read_unlock();
165
166         if (local->hw.conf.power_level != power) {
167                 changed |= IEEE80211_CONF_CHANGE_POWER;
168                 local->hw.conf.power_level = power;
169         }
170
171         return changed;
172 }
173
174 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
175 {
176         int ret = 0;
177
178         might_sleep();
179
180         if (!local->use_chanctx)
181                 changed |= ieee80211_hw_conf_chan(local);
182         else
183                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
184                              IEEE80211_CONF_CHANGE_POWER);
185
186         if (changed && local->open_count) {
187                 ret = drv_config(local, changed);
188                 /*
189                  * Goal:
190                  * HW reconfiguration should never fail, the driver has told
191                  * us what it can support so it should live up to that promise.
192                  *
193                  * Current status:
194                  * rfkill is not integrated with mac80211 and a
195                  * configuration command can thus fail if hardware rfkill
196                  * is enabled
197                  *
198                  * FIXME: integrate rfkill with mac80211 and then add this
199                  * WARN_ON() back
200                  *
201                  */
202                 /* WARN_ON(ret); */
203         }
204
205         return ret;
206 }
207
208 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
209                                       u32 changed)
210 {
211         struct ieee80211_local *local = sdata->local;
212
213         if (!changed)
214                 return;
215
216         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
217 }
218
219 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
220 {
221         sdata->vif.bss_conf.use_cts_prot = false;
222         sdata->vif.bss_conf.use_short_preamble = false;
223         sdata->vif.bss_conf.use_short_slot = false;
224         return BSS_CHANGED_ERP_CTS_PROT |
225                BSS_CHANGED_ERP_PREAMBLE |
226                BSS_CHANGED_ERP_SLOT;
227 }
228
229 static void ieee80211_tasklet_handler(unsigned long data)
230 {
231         struct ieee80211_local *local = (struct ieee80211_local *) data;
232         struct sk_buff *skb;
233
234         while ((skb = skb_dequeue(&local->skb_queue)) ||
235                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
236                 switch (skb->pkt_type) {
237                 case IEEE80211_RX_MSG:
238                         /* Clear skb->pkt_type in order to not confuse kernel
239                          * netstack. */
240                         skb->pkt_type = 0;
241                         ieee80211_rx(&local->hw, skb);
242                         break;
243                 case IEEE80211_TX_STATUS_MSG:
244                         skb->pkt_type = 0;
245                         ieee80211_tx_status(&local->hw, skb);
246                         break;
247                 default:
248                         WARN(1, "mac80211: Packet is of unknown type %d\n",
249                              skb->pkt_type);
250                         dev_kfree_skb(skb);
251                         break;
252                 }
253         }
254 }
255
256 static void ieee80211_restart_work(struct work_struct *work)
257 {
258         struct ieee80211_local *local =
259                 container_of(work, struct ieee80211_local, restart_work);
260
261         /* wait for scan work complete */
262         flush_workqueue(local->workqueue);
263
264         mutex_lock(&local->mtx);
265         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
266              rcu_dereference_protected(local->sched_scan_sdata,
267                                        lockdep_is_held(&local->mtx)),
268                 "%s called with hardware scan in progress\n", __func__);
269         mutex_unlock(&local->mtx);
270
271         rtnl_lock();
272         ieee80211_scan_cancel(local);
273         ieee80211_reconfig(local);
274         rtnl_unlock();
275 }
276
277 void ieee80211_restart_hw(struct ieee80211_hw *hw)
278 {
279         struct ieee80211_local *local = hw_to_local(hw);
280
281         trace_api_restart_hw(local);
282
283         wiphy_info(hw->wiphy,
284                    "Hardware restart was requested\n");
285
286         /* use this reason, ieee80211_reconfig will unblock it */
287         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
288                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
289
290         /*
291          * Stop all Rx during the reconfig. We don't want state changes
292          * or driver callbacks while this is in progress.
293          */
294         local->in_reconfig = true;
295         barrier();
296
297         schedule_work(&local->restart_work);
298 }
299 EXPORT_SYMBOL(ieee80211_restart_hw);
300
301 #ifdef CONFIG_INET
302 static int ieee80211_ifa_changed(struct notifier_block *nb,
303                                  unsigned long data, void *arg)
304 {
305         struct in_ifaddr *ifa = arg;
306         struct ieee80211_local *local =
307                 container_of(nb, struct ieee80211_local,
308                              ifa_notifier);
309         struct net_device *ndev = ifa->ifa_dev->dev;
310         struct wireless_dev *wdev = ndev->ieee80211_ptr;
311         struct in_device *idev;
312         struct ieee80211_sub_if_data *sdata;
313         struct ieee80211_bss_conf *bss_conf;
314         struct ieee80211_if_managed *ifmgd;
315         int c = 0;
316
317         /* Make sure it's our interface that got changed */
318         if (!wdev)
319                 return NOTIFY_DONE;
320
321         if (wdev->wiphy != local->hw.wiphy)
322                 return NOTIFY_DONE;
323
324         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
325         bss_conf = &sdata->vif.bss_conf;
326
327         /* ARP filtering is only supported in managed mode */
328         if (sdata->vif.type != NL80211_IFTYPE_STATION)
329                 return NOTIFY_DONE;
330
331         idev = __in_dev_get_rtnl(sdata->dev);
332         if (!idev)
333                 return NOTIFY_DONE;
334
335         ifmgd = &sdata->u.mgd;
336         mutex_lock(&ifmgd->mtx);
337
338         /* Copy the addresses to the bss_conf list */
339         ifa = idev->ifa_list;
340         while (ifa) {
341                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
342                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
343                 ifa = ifa->ifa_next;
344                 c++;
345         }
346
347         bss_conf->arp_addr_cnt = c;
348
349         /* Configure driver only if associated (which also implies it is up) */
350         if (ifmgd->associated)
351                 ieee80211_bss_info_change_notify(sdata,
352                                                  BSS_CHANGED_ARP_FILTER);
353
354         mutex_unlock(&ifmgd->mtx);
355
356         return NOTIFY_DONE;
357 }
358 #endif
359
360 #if IS_ENABLED(CONFIG_IPV6)
361 static int ieee80211_ifa6_changed(struct notifier_block *nb,
362                                   unsigned long data, void *arg)
363 {
364         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
365         struct inet6_dev *idev = ifa->idev;
366         struct net_device *ndev = ifa->idev->dev;
367         struct ieee80211_local *local =
368                 container_of(nb, struct ieee80211_local, ifa6_notifier);
369         struct wireless_dev *wdev = ndev->ieee80211_ptr;
370         struct ieee80211_sub_if_data *sdata;
371
372         /* Make sure it's our interface that got changed */
373         if (!wdev || wdev->wiphy != local->hw.wiphy)
374                 return NOTIFY_DONE;
375
376         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
377
378         /*
379          * For now only support station mode. This is mostly because
380          * doing AP would have to handle AP_VLAN in some way ...
381          */
382         if (sdata->vif.type != NL80211_IFTYPE_STATION)
383                 return NOTIFY_DONE;
384
385         drv_ipv6_addr_change(local, sdata, idev);
386
387         return NOTIFY_DONE;
388 }
389 #endif
390
391 /* There isn't a lot of sense in it, but you can transmit anything you like */
392 static const struct ieee80211_txrx_stypes
393 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
394         [NL80211_IFTYPE_ADHOC] = {
395                 .tx = 0xffff,
396                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
397                         BIT(IEEE80211_STYPE_AUTH >> 4) |
398                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
399                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
400         },
401         [NL80211_IFTYPE_STATION] = {
402                 .tx = 0xffff,
403                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
404                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
405         },
406         [NL80211_IFTYPE_AP] = {
407                 .tx = 0xffff,
408                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
409                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
411                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
412                         BIT(IEEE80211_STYPE_AUTH >> 4) |
413                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414                         BIT(IEEE80211_STYPE_ACTION >> 4),
415         },
416         [NL80211_IFTYPE_AP_VLAN] = {
417                 /* copy AP */
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_P2P_CLIENT] = {
428                 .tx = 0xffff,
429                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
430                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
431         },
432         [NL80211_IFTYPE_P2P_GO] = {
433                 .tx = 0xffff,
434                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
435                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
436                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
437                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
438                         BIT(IEEE80211_STYPE_AUTH >> 4) |
439                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
440                         BIT(IEEE80211_STYPE_ACTION >> 4),
441         },
442         [NL80211_IFTYPE_MESH_POINT] = {
443                 .tx = 0xffff,
444                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
445                         BIT(IEEE80211_STYPE_AUTH >> 4) |
446                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
447         },
448         [NL80211_IFTYPE_P2P_DEVICE] = {
449                 .tx = 0xffff,
450                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
451                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
452         },
453 };
454
455 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
456         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
457                              IEEE80211_HT_AMPDU_PARM_DENSITY,
458
459         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
460                                 IEEE80211_HT_CAP_MAX_AMSDU |
461                                 IEEE80211_HT_CAP_SGI_20 |
462                                 IEEE80211_HT_CAP_SGI_40),
463         .mcs = {
464                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
465                              0xff, 0xff, 0xff, 0xff, 0xff, },
466         },
467 };
468
469 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
470         .vht_cap_info =
471                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
472                             IEEE80211_VHT_CAP_SHORT_GI_80 |
473                             IEEE80211_VHT_CAP_SHORT_GI_160 |
474                             IEEE80211_VHT_CAP_RXSTBC_1 |
475                             IEEE80211_VHT_CAP_RXSTBC_2 |
476                             IEEE80211_VHT_CAP_RXSTBC_3 |
477                             IEEE80211_VHT_CAP_RXSTBC_4 |
478                             IEEE80211_VHT_CAP_TXSTBC |
479                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
480                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
481                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
482                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
483                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
484         .supp_mcs = {
485                 .rx_mcs_map = cpu_to_le16(~0),
486                 .tx_mcs_map = cpu_to_le16(~0),
487         },
488 };
489
490 static const u8 extended_capabilities[] = {
491         0, 0, 0, 0, 0, 0, 0,
492         WLAN_EXT_CAPA8_OPMODE_NOTIF,
493 };
494
495 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
496                                         const struct ieee80211_ops *ops)
497 {
498         struct ieee80211_local *local;
499         int priv_size, i;
500         struct wiphy *wiphy;
501         bool use_chanctx;
502
503         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
504                     !ops->add_interface || !ops->remove_interface ||
505                     !ops->configure_filter))
506                 return NULL;
507
508         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
509                 return NULL;
510
511         /* check all or no channel context operations exist */
512         i = !!ops->add_chanctx + !!ops->remove_chanctx +
513             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
514             !!ops->unassign_vif_chanctx;
515         if (WARN_ON(i != 0 && i != 5))
516                 return NULL;
517         use_chanctx = i == 5;
518
519         /* Ensure 32-byte alignment of our private data and hw private data.
520          * We use the wiphy priv data for both our ieee80211_local and for
521          * the driver's private data
522          *
523          * In memory it'll be like this:
524          *
525          * +-------------------------+
526          * | struct wiphy           |
527          * +-------------------------+
528          * | struct ieee80211_local  |
529          * +-------------------------+
530          * | driver's private data   |
531          * +-------------------------+
532          *
533          */
534         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
535
536         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
537
538         if (!wiphy)
539                 return NULL;
540
541         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
542
543         wiphy->privid = mac80211_wiphy_privid;
544
545         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
546                         WIPHY_FLAG_4ADDR_AP |
547                         WIPHY_FLAG_4ADDR_STATION |
548                         WIPHY_FLAG_REPORTS_OBSS |
549                         WIPHY_FLAG_OFFCHAN_TX;
550
551         wiphy->extended_capabilities = extended_capabilities;
552         wiphy->extended_capabilities_mask = extended_capabilities;
553         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
554
555         if (ops->remain_on_channel)
556                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
557
558         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
559                            NL80211_FEATURE_SAE |
560                            NL80211_FEATURE_HT_IBSS |
561                            NL80211_FEATURE_VIF_TXPOWER |
562                            NL80211_FEATURE_USERSPACE_MPM;
563
564         if (!ops->hw_scan)
565                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
566                                    NL80211_FEATURE_AP_SCAN;
567
568
569         if (!ops->set_key)
570                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
571
572         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
573
574         local = wiphy_priv(wiphy);
575
576         local->hw.wiphy = wiphy;
577
578         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
579
580         local->ops = ops;
581         local->use_chanctx = use_chanctx;
582
583         /* set up some defaults */
584         local->hw.queues = 1;
585         local->hw.max_rates = 1;
586         local->hw.max_report_rates = 0;
587         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
588         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
589         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
590         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
591         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
592         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
593                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
594                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
595         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
596                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
597         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
598         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
599         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
600         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
601         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
602
603         INIT_LIST_HEAD(&local->interfaces);
604
605         __hw_addr_init(&local->mc_list);
606
607         mutex_init(&local->iflist_mtx);
608         mutex_init(&local->mtx);
609
610         mutex_init(&local->key_mtx);
611         spin_lock_init(&local->filter_lock);
612         spin_lock_init(&local->rx_path_lock);
613         spin_lock_init(&local->queue_stop_reason_lock);
614
615         INIT_LIST_HEAD(&local->chanctx_list);
616         mutex_init(&local->chanctx_mtx);
617
618         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
619
620         INIT_WORK(&local->restart_work, ieee80211_restart_work);
621
622         INIT_WORK(&local->radar_detected_work,
623                   ieee80211_dfs_radar_detected_work);
624
625         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
626         local->smps_mode = IEEE80211_SMPS_OFF;
627
628         INIT_WORK(&local->dynamic_ps_enable_work,
629                   ieee80211_dynamic_ps_enable_work);
630         INIT_WORK(&local->dynamic_ps_disable_work,
631                   ieee80211_dynamic_ps_disable_work);
632         setup_timer(&local->dynamic_ps_timer,
633                     ieee80211_dynamic_ps_timer, (unsigned long) local);
634
635         INIT_WORK(&local->sched_scan_stopped_work,
636                   ieee80211_sched_scan_stopped_work);
637
638         spin_lock_init(&local->ack_status_lock);
639         idr_init(&local->ack_status_frames);
640
641         sta_info_init(local);
642
643         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
644                 skb_queue_head_init(&local->pending[i]);
645                 atomic_set(&local->agg_queue_stop[i], 0);
646         }
647         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
648                      (unsigned long)local);
649
650         tasklet_init(&local->tasklet,
651                      ieee80211_tasklet_handler,
652                      (unsigned long) local);
653
654         skb_queue_head_init(&local->skb_queue);
655         skb_queue_head_init(&local->skb_queue_unreliable);
656
657         ieee80211_led_names(local);
658
659         ieee80211_roc_setup(local);
660
661         return &local->hw;
662 }
663 EXPORT_SYMBOL(ieee80211_alloc_hw);
664
665 int ieee80211_register_hw(struct ieee80211_hw *hw)
666 {
667         struct ieee80211_local *local = hw_to_local(hw);
668         int result, i;
669         enum ieee80211_band band;
670         int channels, max_bitrates;
671         bool supp_ht, supp_vht;
672         netdev_features_t feature_whitelist;
673         struct cfg80211_chan_def dflt_chandef = {};
674         static const u32 cipher_suites[] = {
675                 /* keep WEP first, it may be removed below */
676                 WLAN_CIPHER_SUITE_WEP40,
677                 WLAN_CIPHER_SUITE_WEP104,
678                 WLAN_CIPHER_SUITE_TKIP,
679                 WLAN_CIPHER_SUITE_CCMP,
680
681                 /* keep last -- depends on hw flags! */
682                 WLAN_CIPHER_SUITE_AES_CMAC
683         };
684
685         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
686             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
687              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
688                 return -EINVAL;
689
690 #ifdef CONFIG_PM
691         if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
692             (!local->ops->suspend || !local->ops->resume))
693                 return -EINVAL;
694 #endif
695
696         if (!local->use_chanctx) {
697                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
698                         const struct ieee80211_iface_combination *comb;
699
700                         comb = &local->hw.wiphy->iface_combinations[i];
701
702                         if (comb->num_different_channels > 1)
703                                 return -EINVAL;
704                 }
705         } else {
706                 /*
707                  * WDS is currently prohibited when channel contexts are used
708                  * because there's no clear definition of which channel WDS
709                  * type interfaces use
710                  */
711                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
712                         return -EINVAL;
713
714                 /* DFS currently not supported with channel context drivers */
715                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
716                         const struct ieee80211_iface_combination *comb;
717
718                         comb = &local->hw.wiphy->iface_combinations[i];
719
720                         if (comb->radar_detect_widths)
721                                 return -EINVAL;
722                 }
723         }
724
725         /* Only HW csum features are currently compatible with mac80211 */
726         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
727                             NETIF_F_HW_CSUM;
728         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
729                 return -EINVAL;
730
731         if (hw->max_report_rates == 0)
732                 hw->max_report_rates = hw->max_rates;
733
734         local->rx_chains = 1;
735
736         /*
737          * generic code guarantees at least one band,
738          * set this very early because much code assumes
739          * that hw.conf.channel is assigned
740          */
741         channels = 0;
742         max_bitrates = 0;
743         supp_ht = false;
744         supp_vht = false;
745         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
746                 struct ieee80211_supported_band *sband;
747
748                 sband = local->hw.wiphy->bands[band];
749                 if (!sband)
750                         continue;
751
752                 if (!dflt_chandef.chan) {
753                         cfg80211_chandef_create(&dflt_chandef,
754                                                 &sband->channels[0],
755                                                 NL80211_CHAN_NO_HT);
756                         /* init channel we're on */
757                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
758                                 local->hw.conf.chandef = dflt_chandef;
759                                 local->_oper_chandef = dflt_chandef;
760                         }
761                         local->monitor_chandef = dflt_chandef;
762                 }
763
764                 channels += sband->n_channels;
765
766                 if (max_bitrates < sband->n_bitrates)
767                         max_bitrates = sband->n_bitrates;
768                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
769                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
770
771                 if (sband->ht_cap.ht_supported)
772                         local->rx_chains =
773                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
774                                     local->rx_chains);
775
776                 /* TODO: consider VHT for RX chains, hopefully it's the same */
777         }
778
779         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
780                                       sizeof(void *) * channels, GFP_KERNEL);
781         if (!local->int_scan_req)
782                 return -ENOMEM;
783
784         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
785                 if (!local->hw.wiphy->bands[band])
786                         continue;
787                 local->int_scan_req->rates[band] = (u32) -1;
788         }
789
790         /* if low-level driver supports AP, we also support VLAN */
791         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
792                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
793                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
794         }
795
796         /* mac80211 always supports monitor */
797         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
798         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
799
800         /* mac80211 doesn't support more than one IBSS interface right now */
801         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
802                 const struct ieee80211_iface_combination *c;
803                 int j;
804
805                 c = &hw->wiphy->iface_combinations[i];
806
807                 for (j = 0; j < c->n_limits; j++)
808                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
809                             c->limits[j].max > 1)
810                                 return -EINVAL;
811         }
812
813 #ifndef CONFIG_MAC80211_MESH
814         /* mesh depends on Kconfig, but drivers should set it if they want */
815         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
816 #endif
817
818         /* if the underlying driver supports mesh, mac80211 will (at least)
819          * provide routing of mesh authentication frames to userspace */
820         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
821                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
822
823         /* mac80211 supports control port protocol changing */
824         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
825
826         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
827                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
828         else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
829                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
830
831         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
832              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
833              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
834
835         /*
836          * Calculate scan IE length -- we need this to alloc
837          * memory and to subtract from the driver limit. It
838          * includes the DS Params, (extended) supported rates, and HT
839          * information -- SSID is the driver's responsibility.
840          */
841         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
842                 3 /* DS Params */;
843         if (supp_ht)
844                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
845
846         if (supp_vht)
847                 local->scan_ies_len +=
848                         2 + sizeof(struct ieee80211_vht_cap);
849
850         if (!local->ops->hw_scan) {
851                 /* For hw_scan, driver needs to set these up. */
852                 local->hw.wiphy->max_scan_ssids = 4;
853                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
854         }
855
856         /*
857          * If the driver supports any scan IEs, then assume the
858          * limit includes the IEs mac80211 will add, otherwise
859          * leave it at zero and let the driver sort it out; we
860          * still pass our IEs to the driver but userspace will
861          * not be allowed to in that case.
862          */
863         if (local->hw.wiphy->max_scan_ie_len)
864                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
865
866         /* Set up cipher suites unless driver already did */
867         if (!local->hw.wiphy->cipher_suites) {
868                 local->hw.wiphy->cipher_suites = cipher_suites;
869                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
870                 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
871                         local->hw.wiphy->n_cipher_suites--;
872         }
873         if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
874                 if (local->hw.wiphy->cipher_suites == cipher_suites) {
875                         local->hw.wiphy->cipher_suites += 2;
876                         local->hw.wiphy->n_cipher_suites -= 2;
877                 } else {
878                         u32 *suites;
879                         int r, w = 0;
880
881                         /* Filter out WEP */
882
883                         suites = kmemdup(
884                                 local->hw.wiphy->cipher_suites,
885                                 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
886                                 GFP_KERNEL);
887                         if (!suites) {
888                                 result = -ENOMEM;
889                                 goto fail_wiphy_register;
890                         }
891                         for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
892                                 u32 suite = local->hw.wiphy->cipher_suites[r];
893                                 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
894                                     suite == WLAN_CIPHER_SUITE_WEP104)
895                                         continue;
896                                 suites[w++] = suite;
897                         }
898                         local->hw.wiphy->cipher_suites = suites;
899                         local->hw.wiphy->n_cipher_suites = w;
900                         local->wiphy_ciphers_allocated = true;
901                 }
902         }
903
904         if (!local->ops->remain_on_channel)
905                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
906
907         if (local->ops->sched_scan_start)
908                 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
909
910         /* mac80211 based drivers don't support internal TDLS setup */
911         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
912                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
913
914         result = wiphy_register(local->hw.wiphy);
915         if (result < 0)
916                 goto fail_wiphy_register;
917
918         /*
919          * We use the number of queues for feature tests (QoS, HT) internally
920          * so restrict them appropriately.
921          */
922         if (hw->queues > IEEE80211_MAX_QUEUES)
923                 hw->queues = IEEE80211_MAX_QUEUES;
924
925         local->workqueue =
926                 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
927         if (!local->workqueue) {
928                 result = -ENOMEM;
929                 goto fail_workqueue;
930         }
931
932         /*
933          * The hardware needs headroom for sending the frame,
934          * and we need some headroom for passing the frame to monitor
935          * interfaces, but never both at the same time.
936          */
937         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
938                                    IEEE80211_TX_STATUS_HEADROOM);
939
940         debugfs_hw_add(local);
941
942         /*
943          * if the driver doesn't specify a max listen interval we
944          * use 5 which should be a safe default
945          */
946         if (local->hw.max_listen_interval == 0)
947                 local->hw.max_listen_interval = 5;
948
949         local->hw.conf.listen_interval = local->hw.max_listen_interval;
950
951         local->dynamic_ps_forced_timeout = -1;
952
953         result = ieee80211_wep_init(local);
954         if (result < 0)
955                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
956                             result);
957
958         ieee80211_led_init(local);
959
960         rtnl_lock();
961
962         result = ieee80211_init_rate_ctrl_alg(local,
963                                               hw->rate_control_algorithm);
964         if (result < 0) {
965                 wiphy_debug(local->hw.wiphy,
966                             "Failed to initialize rate control algorithm\n");
967                 goto fail_rate;
968         }
969
970         /* add one default STA interface if supported */
971         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
972                 result = ieee80211_if_add(local, "wlan%d", NULL,
973                                           NL80211_IFTYPE_STATION, NULL);
974                 if (result)
975                         wiphy_warn(local->hw.wiphy,
976                                    "Failed to add default virtual iface\n");
977         }
978           // ESP8089 register p2p0 IFTYPE_STA
979         #ifdef CONFIG_ESP8089 
980             if (local->hw.wiphy->interface_modes &(BIT(NL80211_IFTYPE_P2P_GO) |
981         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
982                          result = ieee80211_if_add(local, "p2p%d", NULL,
983                                             NL80211_IFTYPE_STATION, NULL);
984                               if (result)
985                                    wiphy_warn(local->hw.wiphy,
986                                            "Failed to add default virtual iface\n");
987                         }
988                  
989         #endif
990         rtnl_unlock();
991
992         local->network_latency_notifier.notifier_call =
993                 ieee80211_max_network_latency;
994         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
995                                      &local->network_latency_notifier);
996         if (result) {
997                 rtnl_lock();
998                 goto fail_pm_qos;
999         }
1000
1001 #ifdef CONFIG_INET
1002         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1003         result = register_inetaddr_notifier(&local->ifa_notifier);
1004         if (result)
1005                 goto fail_ifa;
1006 #endif
1007
1008 #if IS_ENABLED(CONFIG_IPV6)
1009         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1010         result = register_inet6addr_notifier(&local->ifa6_notifier);
1011         if (result)
1012                 goto fail_ifa6;
1013 #endif
1014
1015         return 0;
1016
1017 #if IS_ENABLED(CONFIG_IPV6)
1018  fail_ifa6:
1019 #ifdef CONFIG_INET
1020         unregister_inetaddr_notifier(&local->ifa_notifier);
1021 #endif
1022 #endif
1023 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1024  fail_ifa:
1025         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1026                                &local->network_latency_notifier);
1027         rtnl_lock();
1028 #endif
1029  fail_pm_qos:
1030         ieee80211_led_exit(local);
1031         ieee80211_remove_interfaces(local);
1032  fail_rate:
1033         rtnl_unlock();
1034         ieee80211_wep_free(local);
1035         sta_info_stop(local);
1036         destroy_workqueue(local->workqueue);
1037  fail_workqueue:
1038         wiphy_unregister(local->hw.wiphy);
1039  fail_wiphy_register:
1040         if (local->wiphy_ciphers_allocated)
1041                 kfree(local->hw.wiphy->cipher_suites);
1042         kfree(local->int_scan_req);
1043         return result;
1044 }
1045 EXPORT_SYMBOL(ieee80211_register_hw);
1046
1047 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1048 {
1049         struct ieee80211_local *local = hw_to_local(hw);
1050
1051         tasklet_kill(&local->tx_pending_tasklet);
1052         tasklet_kill(&local->tasklet);
1053
1054         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1055                                &local->network_latency_notifier);
1056 #ifdef CONFIG_INET
1057         unregister_inetaddr_notifier(&local->ifa_notifier);
1058 #endif
1059 #if IS_ENABLED(CONFIG_IPV6)
1060         unregister_inet6addr_notifier(&local->ifa6_notifier);
1061 #endif
1062
1063         rtnl_lock();
1064
1065         /*
1066          * At this point, interface list manipulations are fine
1067          * because the driver cannot be handing us frames any
1068          * more and the tasklet is killed.
1069          */
1070         ieee80211_remove_interfaces(local);
1071
1072         rtnl_unlock();
1073
1074         cancel_work_sync(&local->restart_work);
1075         cancel_work_sync(&local->reconfig_filter);
1076
1077         ieee80211_clear_tx_pending(local);
1078         rate_control_deinitialize(local);
1079
1080         if (skb_queue_len(&local->skb_queue) ||
1081             skb_queue_len(&local->skb_queue_unreliable))
1082                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1083         skb_queue_purge(&local->skb_queue);
1084         skb_queue_purge(&local->skb_queue_unreliable);
1085
1086         destroy_workqueue(local->workqueue);
1087         wiphy_unregister(local->hw.wiphy);
1088         sta_info_stop(local);
1089         ieee80211_wep_free(local);
1090         ieee80211_led_exit(local);
1091         kfree(local->int_scan_req);
1092 }
1093 EXPORT_SYMBOL(ieee80211_unregister_hw);
1094
1095 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1096 {
1097         WARN_ONCE(1, "Have pending ack frames!\n");
1098         kfree_skb(p);
1099         return 0;
1100 }
1101
1102 void ieee80211_free_hw(struct ieee80211_hw *hw)
1103 {
1104         struct ieee80211_local *local = hw_to_local(hw);
1105
1106         mutex_destroy(&local->iflist_mtx);
1107         mutex_destroy(&local->mtx);
1108
1109         if (local->wiphy_ciphers_allocated)
1110                 kfree(local->hw.wiphy->cipher_suites);
1111
1112         idr_for_each(&local->ack_status_frames,
1113                      ieee80211_free_ack_frame, NULL);
1114         idr_destroy(&local->ack_status_frames);
1115
1116         wiphy_free(local->hw.wiphy);
1117 }
1118 EXPORT_SYMBOL(ieee80211_free_hw);
1119
1120 static int __init ieee80211_init(void)
1121 {
1122         struct sk_buff *skb;
1123         int ret;
1124
1125         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1126         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1127                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1128
1129         ret = rc80211_minstrel_init();
1130         if (ret)
1131                 return ret;
1132
1133         ret = rc80211_minstrel_ht_init();
1134         if (ret)
1135                 goto err_minstrel;
1136
1137         ret = rc80211_pid_init();
1138         if (ret)
1139                 goto err_pid;
1140
1141         ret = ieee80211_iface_init();
1142         if (ret)
1143                 goto err_netdev;
1144
1145         return 0;
1146  err_netdev:
1147         rc80211_pid_exit();
1148  err_pid:
1149         rc80211_minstrel_ht_exit();
1150  err_minstrel:
1151         rc80211_minstrel_exit();
1152
1153         return ret;
1154 }
1155
1156 static void __exit ieee80211_exit(void)
1157 {
1158         rc80211_pid_exit();
1159         rc80211_minstrel_ht_exit();
1160         rc80211_minstrel_exit();
1161
1162         ieee80211s_stop();
1163
1164         ieee80211_iface_exit();
1165
1166         rcu_barrier();
1167 }
1168
1169
1170 subsys_initcall(ieee80211_init);
1171 module_exit(ieee80211_exit);
1172
1173 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1174 MODULE_LICENSE("GPL");