8345926193de487c6f783b0a452ff0c74eba02c1
[sfrench/cifs-2.6.git] / net / mac80211 / main.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2002-2005, Instant802 Networks, Inc.
4  * Copyright 2005-2006, Devicescape Software, Inc.
5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
6  * Copyright 2013-2014  Intel Mobile Communications GmbH
7  * Copyright (C) 2017     Intel Deutschland GmbH
8  * Copyright (C) 2018 - 2019 Intel Corporation
9  */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.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 "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38         u64 mc;
39         unsigned int changed_flags;
40         unsigned int new_flags = 0;
41
42         if (atomic_read(&local->iff_allmultis))
43                 new_flags |= FIF_ALLMULTI;
44
45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49         if (local->fif_probe_req || local->probe_req_reg)
50                 new_flags |= FIF_PROBE_REQ;
51
52         if (local->fif_fcsfail)
53                 new_flags |= FIF_FCSFAIL;
54
55         if (local->fif_plcpfail)
56                 new_flags |= FIF_PLCPFAIL;
57
58         if (local->fif_control)
59                 new_flags |= FIF_CONTROL;
60
61         if (local->fif_other_bss)
62                 new_flags |= FIF_OTHER_BSS;
63
64         if (local->fif_pspoll)
65                 new_flags |= FIF_PSPOLL;
66
67         spin_lock_bh(&local->filter_lock);
68         changed_flags = local->filter_flags ^ new_flags;
69
70         mc = drv_prepare_multicast(local, &local->mc_list);
71         spin_unlock_bh(&local->filter_lock);
72
73         /* be a bit nasty */
74         new_flags |= (1<<31);
75
76         drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78         WARN_ON(new_flags & (1<<31));
79
80         local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85         struct ieee80211_local *local =
86                 container_of(work, struct ieee80211_local, reconfig_filter);
87
88         ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93         struct ieee80211_sub_if_data *sdata;
94         struct cfg80211_chan_def chandef = {};
95         u32 changed = 0;
96         int power;
97         u32 offchannel_flag;
98
99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101         if (local->scan_chandef.chan) {
102                 chandef = local->scan_chandef;
103         } else if (local->tmp_channel) {
104                 chandef.chan = local->tmp_channel;
105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106                 chandef.center_freq1 = chandef.chan->center_freq;
107         } else
108                 chandef = local->_oper_chandef;
109
110         WARN(!cfg80211_chandef_valid(&chandef),
111              "control:%d MHz width:%d center: %d/%d MHz",
112              chandef.chan->center_freq, chandef.width,
113              chandef.center_freq1, chandef.center_freq2);
114
115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117         else
118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122         if (offchannel_flag ||
123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
124                                         &local->_oper_chandef)) {
125                 local->hw.conf.chandef = chandef;
126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127         }
128
129         if (!conf_is_ht(&local->hw.conf)) {
130                 /*
131                  * mac80211.h documents that this is only valid
132                  * when the channel is set to an HT type, and
133                  * that otherwise STATIC is used.
134                  */
135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
137                 local->hw.conf.smps_mode = local->smps_mode;
138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
139         }
140
141         power = ieee80211_chandef_max_power(&chandef);
142
143         rcu_read_lock();
144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146                         continue;
147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148                         continue;
149                 if (sdata->vif.bss_conf.txpower == INT_MIN)
150                         continue;
151                 power = min(power, sdata->vif.bss_conf.txpower);
152         }
153         rcu_read_unlock();
154
155         if (local->hw.conf.power_level != power) {
156                 changed |= IEEE80211_CONF_CHANGE_POWER;
157                 local->hw.conf.power_level = power;
158         }
159
160         return changed;
161 }
162
163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
164 {
165         int ret = 0;
166
167         might_sleep();
168
169         if (!local->use_chanctx)
170                 changed |= ieee80211_hw_conf_chan(local);
171         else
172                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173                              IEEE80211_CONF_CHANGE_POWER);
174
175         if (changed && local->open_count) {
176                 ret = drv_config(local, changed);
177                 /*
178                  * Goal:
179                  * HW reconfiguration should never fail, the driver has told
180                  * us what it can support so it should live up to that promise.
181                  *
182                  * Current status:
183                  * rfkill is not integrated with mac80211 and a
184                  * configuration command can thus fail if hardware rfkill
185                  * is enabled
186                  *
187                  * FIXME: integrate rfkill with mac80211 and then add this
188                  * WARN_ON() back
189                  *
190                  */
191                 /* WARN_ON(ret); */
192         }
193
194         return ret;
195 }
196
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198                                       u32 changed)
199 {
200         struct ieee80211_local *local = sdata->local;
201
202         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203                 return;
204
205         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 }
207
208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209 {
210         sdata->vif.bss_conf.use_cts_prot = false;
211         sdata->vif.bss_conf.use_short_preamble = false;
212         sdata->vif.bss_conf.use_short_slot = false;
213         return BSS_CHANGED_ERP_CTS_PROT |
214                BSS_CHANGED_ERP_PREAMBLE |
215                BSS_CHANGED_ERP_SLOT;
216 }
217
218 static void ieee80211_tasklet_handler(unsigned long data)
219 {
220         struct ieee80211_local *local = (struct ieee80211_local *) data;
221         struct sk_buff *skb;
222
223         while ((skb = skb_dequeue(&local->skb_queue)) ||
224                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225                 switch (skb->pkt_type) {
226                 case IEEE80211_RX_MSG:
227                         /* Clear skb->pkt_type in order to not confuse kernel
228                          * netstack. */
229                         skb->pkt_type = 0;
230                         ieee80211_rx(&local->hw, skb);
231                         break;
232                 case IEEE80211_TX_STATUS_MSG:
233                         skb->pkt_type = 0;
234                         ieee80211_tx_status(&local->hw, skb);
235                         break;
236                 default:
237                         WARN(1, "mac80211: Packet is of unknown type %d\n",
238                              skb->pkt_type);
239                         dev_kfree_skb(skb);
240                         break;
241                 }
242         }
243 }
244
245 static void ieee80211_restart_work(struct work_struct *work)
246 {
247         struct ieee80211_local *local =
248                 container_of(work, struct ieee80211_local, restart_work);
249         struct ieee80211_sub_if_data *sdata;
250
251         /* wait for scan work complete */
252         flush_workqueue(local->workqueue);
253         flush_work(&local->sched_scan_stopped_work);
254
255         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256              "%s called with hardware scan in progress\n", __func__);
257
258         flush_work(&local->radar_detected_work);
259         rtnl_lock();
260         list_for_each_entry(sdata, &local->interfaces, list) {
261                 /*
262                  * XXX: there may be more work for other vif types and even
263                  * for station mode: a good thing would be to run most of
264                  * the iface type's dependent _stop (ieee80211_mg_stop,
265                  * ieee80211_ibss_stop) etc...
266                  * For now, fix only the specific bug that was seen: race
267                  * between csa_connection_drop_work and us.
268                  */
269                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
270                         /*
271                          * This worker is scheduled from the iface worker that
272                          * runs on mac80211's workqueue, so we can't be
273                          * scheduling this worker after the cancel right here.
274                          * The exception is ieee80211_chswitch_done.
275                          * Then we can have a race...
276                          */
277                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
278                 }
279                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
280         }
281         ieee80211_scan_cancel(local);
282
283         /* make sure any new ROC will consider local->in_reconfig */
284         flush_delayed_work(&local->roc_work);
285         flush_work(&local->hw_roc_done);
286
287         /* wait for all packet processing to be done */
288         synchronize_net();
289
290         ieee80211_reconfig(local);
291         rtnl_unlock();
292 }
293
294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
295 {
296         struct ieee80211_local *local = hw_to_local(hw);
297
298         trace_api_restart_hw(local);
299
300         wiphy_info(hw->wiphy,
301                    "Hardware restart was requested\n");
302
303         /* use this reason, ieee80211_reconfig will unblock it */
304         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
305                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
306                                         false);
307
308         /*
309          * Stop all Rx during the reconfig. We don't want state changes
310          * or driver callbacks while this is in progress.
311          */
312         local->in_reconfig = true;
313         barrier();
314
315         queue_work(system_freezable_wq, &local->restart_work);
316 }
317 EXPORT_SYMBOL(ieee80211_restart_hw);
318
319 #ifdef CONFIG_INET
320 static int ieee80211_ifa_changed(struct notifier_block *nb,
321                                  unsigned long data, void *arg)
322 {
323         struct in_ifaddr *ifa = arg;
324         struct ieee80211_local *local =
325                 container_of(nb, struct ieee80211_local,
326                              ifa_notifier);
327         struct net_device *ndev = ifa->ifa_dev->dev;
328         struct wireless_dev *wdev = ndev->ieee80211_ptr;
329         struct in_device *idev;
330         struct ieee80211_sub_if_data *sdata;
331         struct ieee80211_bss_conf *bss_conf;
332         struct ieee80211_if_managed *ifmgd;
333         int c = 0;
334
335         /* Make sure it's our interface that got changed */
336         if (!wdev)
337                 return NOTIFY_DONE;
338
339         if (wdev->wiphy != local->hw.wiphy)
340                 return NOTIFY_DONE;
341
342         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
343         bss_conf = &sdata->vif.bss_conf;
344
345         /* ARP filtering is only supported in managed mode */
346         if (sdata->vif.type != NL80211_IFTYPE_STATION)
347                 return NOTIFY_DONE;
348
349         idev = __in_dev_get_rtnl(sdata->dev);
350         if (!idev)
351                 return NOTIFY_DONE;
352
353         ifmgd = &sdata->u.mgd;
354         sdata_lock(sdata);
355
356         /* Copy the addresses to the bss_conf list */
357         ifa = rtnl_dereference(idev->ifa_list);
358         while (ifa) {
359                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
360                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
361                 ifa = rtnl_dereference(ifa->ifa_next);
362                 c++;
363         }
364
365         bss_conf->arp_addr_cnt = c;
366
367         /* Configure driver only if associated (which also implies it is up) */
368         if (ifmgd->associated)
369                 ieee80211_bss_info_change_notify(sdata,
370                                                  BSS_CHANGED_ARP_FILTER);
371
372         sdata_unlock(sdata);
373
374         return NOTIFY_OK;
375 }
376 #endif
377
378 #if IS_ENABLED(CONFIG_IPV6)
379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
380                                   unsigned long data, void *arg)
381 {
382         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
383         struct inet6_dev *idev = ifa->idev;
384         struct net_device *ndev = ifa->idev->dev;
385         struct ieee80211_local *local =
386                 container_of(nb, struct ieee80211_local, ifa6_notifier);
387         struct wireless_dev *wdev = ndev->ieee80211_ptr;
388         struct ieee80211_sub_if_data *sdata;
389
390         /* Make sure it's our interface that got changed */
391         if (!wdev || wdev->wiphy != local->hw.wiphy)
392                 return NOTIFY_DONE;
393
394         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
395
396         /*
397          * For now only support station mode. This is mostly because
398          * doing AP would have to handle AP_VLAN in some way ...
399          */
400         if (sdata->vif.type != NL80211_IFTYPE_STATION)
401                 return NOTIFY_DONE;
402
403         drv_ipv6_addr_change(local, sdata, idev);
404
405         return NOTIFY_OK;
406 }
407 #endif
408
409 /* There isn't a lot of sense in it, but you can transmit anything you like */
410 static const struct ieee80211_txrx_stypes
411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
412         [NL80211_IFTYPE_ADHOC] = {
413                 .tx = 0xffff,
414                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415                         BIT(IEEE80211_STYPE_AUTH >> 4) |
416                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418         },
419         [NL80211_IFTYPE_STATION] = {
420                 .tx = 0xffff,
421                 /*
422                  * To support Pre Association Security Negotiation (PASN) while
423                  * already associated to one AP, allow user space to register to
424                  * Rx authentication frames, so that the user space logic would
425                  * be able to receive/handle authentication frames from a
426                  * different AP as part of PASN.
427                  * It is expected that user space would intelligently register
428                  * for Rx authentication frames, i.e., only when PASN is used
429                  * and configure a match filter only for PASN authentication
430                  * algorithm, as otherwise the MLME functionality of mac80211
431                  * would be broken.
432                  */
433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
435                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
436         },
437         [NL80211_IFTYPE_AP] = {
438                 .tx = 0xffff,
439                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
440                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
441                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
442                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
443                         BIT(IEEE80211_STYPE_AUTH >> 4) |
444                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
445                         BIT(IEEE80211_STYPE_ACTION >> 4),
446         },
447         [NL80211_IFTYPE_AP_VLAN] = {
448                 /* copy AP */
449                 .tx = 0xffff,
450                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
451                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
452                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
453                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
454                         BIT(IEEE80211_STYPE_AUTH >> 4) |
455                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
456                         BIT(IEEE80211_STYPE_ACTION >> 4),
457         },
458         [NL80211_IFTYPE_P2P_CLIENT] = {
459                 .tx = 0xffff,
460                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
461                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
462         },
463         [NL80211_IFTYPE_P2P_GO] = {
464                 .tx = 0xffff,
465                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
466                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
467                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
468                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
469                         BIT(IEEE80211_STYPE_AUTH >> 4) |
470                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
471                         BIT(IEEE80211_STYPE_ACTION >> 4),
472         },
473         [NL80211_IFTYPE_MESH_POINT] = {
474                 .tx = 0xffff,
475                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
476                         BIT(IEEE80211_STYPE_AUTH >> 4) |
477                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
478         },
479         [NL80211_IFTYPE_P2P_DEVICE] = {
480                 .tx = 0xffff,
481                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
482                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
483         },
484 };
485
486 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
487         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
488                              IEEE80211_HT_AMPDU_PARM_DENSITY,
489
490         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
491                                 IEEE80211_HT_CAP_MAX_AMSDU |
492                                 IEEE80211_HT_CAP_SGI_20 |
493                                 IEEE80211_HT_CAP_SGI_40 |
494                                 IEEE80211_HT_CAP_TX_STBC |
495                                 IEEE80211_HT_CAP_RX_STBC |
496                                 IEEE80211_HT_CAP_LDPC_CODING |
497                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
498         .mcs = {
499                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
500                              0xff, 0xff, 0xff, 0xff, 0xff, },
501         },
502 };
503
504 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
505         .vht_cap_info =
506                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
507                             IEEE80211_VHT_CAP_SHORT_GI_80 |
508                             IEEE80211_VHT_CAP_SHORT_GI_160 |
509                             IEEE80211_VHT_CAP_RXSTBC_MASK |
510                             IEEE80211_VHT_CAP_TXSTBC |
511                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
512                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
513                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
514                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
515                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
516         .supp_mcs = {
517                 .rx_mcs_map = cpu_to_le16(~0),
518                 .tx_mcs_map = cpu_to_le16(~0),
519         },
520 };
521
522 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
523                                            const struct ieee80211_ops *ops,
524                                            const char *requested_name)
525 {
526         struct ieee80211_local *local;
527         int priv_size, i;
528         struct wiphy *wiphy;
529         bool use_chanctx;
530
531         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
532                     !ops->add_interface || !ops->remove_interface ||
533                     !ops->configure_filter))
534                 return NULL;
535
536         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
537                 return NULL;
538
539         /* check all or no channel context operations exist */
540         i = !!ops->add_chanctx + !!ops->remove_chanctx +
541             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
542             !!ops->unassign_vif_chanctx;
543         if (WARN_ON(i != 0 && i != 5))
544                 return NULL;
545         use_chanctx = i == 5;
546
547         /* Ensure 32-byte alignment of our private data and hw private data.
548          * We use the wiphy priv data for both our ieee80211_local and for
549          * the driver's private data
550          *
551          * In memory it'll be like this:
552          *
553          * +-------------------------+
554          * | struct wiphy           |
555          * +-------------------------+
556          * | struct ieee80211_local  |
557          * +-------------------------+
558          * | driver's private data   |
559          * +-------------------------+
560          *
561          */
562         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
563
564         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
565
566         if (!wiphy)
567                 return NULL;
568
569         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
570
571         wiphy->privid = mac80211_wiphy_privid;
572
573         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
574                         WIPHY_FLAG_4ADDR_AP |
575                         WIPHY_FLAG_4ADDR_STATION |
576                         WIPHY_FLAG_REPORTS_OBSS |
577                         WIPHY_FLAG_OFFCHAN_TX;
578
579         if (!use_chanctx || ops->remain_on_channel)
580                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
581
582         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
583                            NL80211_FEATURE_SAE |
584                            NL80211_FEATURE_HT_IBSS |
585                            NL80211_FEATURE_VIF_TXPOWER |
586                            NL80211_FEATURE_MAC_ON_CREATE |
587                            NL80211_FEATURE_USERSPACE_MPM |
588                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
589         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
590         wiphy_ext_feature_set(wiphy,
591                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
592         wiphy_ext_feature_set(wiphy,
593                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
594
595         if (!ops->hw_scan) {
596                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
597                                    NL80211_FEATURE_AP_SCAN;
598                 /*
599                  * if the driver behaves correctly using the probe request
600                  * (template) from mac80211, then both of these should be
601                  * supported even with hw scan - but let drivers opt in.
602                  */
603                 wiphy_ext_feature_set(wiphy,
604                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
605                 wiphy_ext_feature_set(wiphy,
606                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
607         }
608
609         if (!ops->set_key)
610                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
611
612         if (ops->wake_tx_queue)
613                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
614
615         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
616
617         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
618
619         local = wiphy_priv(wiphy);
620
621         if (sta_info_init(local))
622                 goto err_free;
623
624         local->hw.wiphy = wiphy;
625
626         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
627
628         local->ops = ops;
629         local->use_chanctx = use_chanctx;
630
631         /*
632          * We need a bit of data queued to build aggregates properly, so
633          * instruct the TCP stack to allow more than a single ms of data
634          * to be queued in the stack. The value is a bit-shift of 1
635          * second, so 7 is ~8ms of queued data. Only affects local TCP
636          * sockets.
637          * This is the default, anyhow - drivers may need to override it
638          * for local reasons (longer buffers, longer completion time, or
639          * similar).
640          */
641         local->hw.tx_sk_pacing_shift = 7;
642
643         /* set up some defaults */
644         local->hw.queues = 1;
645         local->hw.max_rates = 1;
646         local->hw.max_report_rates = 0;
647         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
648         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
649         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
650         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
651         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
652         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
653                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
654                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
655         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
656                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
657         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
658         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
659         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
660         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
661         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
662         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
663
664         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
665
666         wiphy->extended_capabilities = local->ext_capa;
667         wiphy->extended_capabilities_mask = local->ext_capa;
668         wiphy->extended_capabilities_len =
669                 ARRAY_SIZE(local->ext_capa);
670
671         INIT_LIST_HEAD(&local->interfaces);
672         INIT_LIST_HEAD(&local->mon_list);
673
674         __hw_addr_init(&local->mc_list);
675
676         mutex_init(&local->iflist_mtx);
677         mutex_init(&local->mtx);
678
679         mutex_init(&local->key_mtx);
680         spin_lock_init(&local->filter_lock);
681         spin_lock_init(&local->rx_path_lock);
682         spin_lock_init(&local->queue_stop_reason_lock);
683
684         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
685                 INIT_LIST_HEAD(&local->active_txqs[i]);
686                 spin_lock_init(&local->active_txq_lock[i]);
687                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
688                 local->aql_txq_limit_high[i] =
689                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
690         }
691
692         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
693         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
694         atomic_set(&local->aql_total_pending_airtime, 0);
695
696         INIT_LIST_HEAD(&local->chanctx_list);
697         mutex_init(&local->chanctx_mtx);
698
699         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
700
701         INIT_WORK(&local->restart_work, ieee80211_restart_work);
702
703         INIT_WORK(&local->radar_detected_work,
704                   ieee80211_dfs_radar_detected_work);
705
706         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
707         local->smps_mode = IEEE80211_SMPS_OFF;
708
709         INIT_WORK(&local->dynamic_ps_enable_work,
710                   ieee80211_dynamic_ps_enable_work);
711         INIT_WORK(&local->dynamic_ps_disable_work,
712                   ieee80211_dynamic_ps_disable_work);
713         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
714
715         INIT_WORK(&local->sched_scan_stopped_work,
716                   ieee80211_sched_scan_stopped_work);
717
718         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
719
720         spin_lock_init(&local->ack_status_lock);
721         idr_init(&local->ack_status_frames);
722
723         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
724                 skb_queue_head_init(&local->pending[i]);
725                 atomic_set(&local->agg_queue_stop[i], 0);
726         }
727         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
728                      (unsigned long)local);
729
730         if (ops->wake_tx_queue)
731                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
732                              (unsigned long)local);
733
734         tasklet_init(&local->tasklet,
735                      ieee80211_tasklet_handler,
736                      (unsigned long) local);
737
738         skb_queue_head_init(&local->skb_queue);
739         skb_queue_head_init(&local->skb_queue_unreliable);
740         skb_queue_head_init(&local->skb_queue_tdls_chsw);
741
742         ieee80211_alloc_led_names(local);
743
744         ieee80211_roc_setup(local);
745
746         local->hw.radiotap_timestamp.units_pos = -1;
747         local->hw.radiotap_timestamp.accuracy = -1;
748
749         return &local->hw;
750  err_free:
751         wiphy_free(wiphy);
752         return NULL;
753 }
754 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
755
756 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
757 {
758         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
759         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
760         int n_suites = 0, r = 0, w = 0;
761         u32 *suites;
762         static const u32 cipher_suites[] = {
763                 /* keep WEP first, it may be removed below */
764                 WLAN_CIPHER_SUITE_WEP40,
765                 WLAN_CIPHER_SUITE_WEP104,
766                 WLAN_CIPHER_SUITE_TKIP,
767                 WLAN_CIPHER_SUITE_CCMP,
768                 WLAN_CIPHER_SUITE_CCMP_256,
769                 WLAN_CIPHER_SUITE_GCMP,
770                 WLAN_CIPHER_SUITE_GCMP_256,
771
772                 /* keep last -- depends on hw flags! */
773                 WLAN_CIPHER_SUITE_AES_CMAC,
774                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
775                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
776                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
777         };
778
779         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
780             local->hw.wiphy->cipher_suites) {
781                 /* If the driver advertises, or doesn't support SW crypto,
782                  * we only need to remove WEP if necessary.
783                  */
784                 if (have_wep)
785                         return 0;
786
787                 /* well if it has _no_ ciphers ... fine */
788                 if (!local->hw.wiphy->n_cipher_suites)
789                         return 0;
790
791                 /* Driver provides cipher suites, but we need to exclude WEP */
792                 suites = kmemdup(local->hw.wiphy->cipher_suites,
793                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
794                                  GFP_KERNEL);
795                 if (!suites)
796                         return -ENOMEM;
797
798                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
799                         u32 suite = local->hw.wiphy->cipher_suites[r];
800
801                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
802                             suite == WLAN_CIPHER_SUITE_WEP104)
803                                 continue;
804                         suites[w++] = suite;
805                 }
806         } else if (!local->hw.cipher_schemes) {
807                 /* If the driver doesn't have cipher schemes, there's nothing
808                  * else to do other than assign the (software supported and
809                  * perhaps offloaded) cipher suites.
810                  */
811                 local->hw.wiphy->cipher_suites = cipher_suites;
812                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
813
814                 if (!have_mfp)
815                         local->hw.wiphy->n_cipher_suites -= 4;
816
817                 if (!have_wep) {
818                         local->hw.wiphy->cipher_suites += 2;
819                         local->hw.wiphy->n_cipher_suites -= 2;
820                 }
821
822                 /* not dynamically allocated, so just return */
823                 return 0;
824         } else {
825                 const struct ieee80211_cipher_scheme *cs;
826
827                 cs = local->hw.cipher_schemes;
828
829                 /* Driver specifies cipher schemes only (but not cipher suites
830                  * including the schemes)
831                  *
832                  * We start counting ciphers defined by schemes, TKIP, CCMP,
833                  * CCMP-256, GCMP, and GCMP-256
834                  */
835                 n_suites = local->hw.n_cipher_schemes + 5;
836
837                 /* check if we have WEP40 and WEP104 */
838                 if (have_wep)
839                         n_suites += 2;
840
841                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
842                  * BIP-GMAC-256
843                  */
844                 if (have_mfp)
845                         n_suites += 4;
846
847                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
848                 if (!suites)
849                         return -ENOMEM;
850
851                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
852                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
853                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
854                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
855                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
856
857                 if (have_wep) {
858                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
859                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
860                 }
861
862                 if (have_mfp) {
863                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
864                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
865                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
866                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
867                 }
868
869                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
870                         suites[w++] = cs[r].cipher;
871                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
872                                 kfree(suites);
873                                 return -EINVAL;
874                         }
875                 }
876         }
877
878         local->hw.wiphy->cipher_suites = suites;
879         local->hw.wiphy->n_cipher_suites = w;
880         local->wiphy_ciphers_allocated = true;
881
882         return 0;
883 }
884
885 int ieee80211_register_hw(struct ieee80211_hw *hw)
886 {
887         struct ieee80211_local *local = hw_to_local(hw);
888         int result, i;
889         enum nl80211_band band;
890         int channels, max_bitrates;
891         bool supp_ht, supp_vht, supp_he;
892         struct cfg80211_chan_def dflt_chandef = {};
893
894         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
895             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
896              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
897                 return -EINVAL;
898
899         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
900             (!local->ops->tdls_channel_switch ||
901              !local->ops->tdls_cancel_channel_switch ||
902              !local->ops->tdls_recv_channel_switch))
903                 return -EOPNOTSUPP;
904
905         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
906                     !local->ops->set_frag_threshold))
907                 return -EINVAL;
908
909         if (WARN_ON(local->hw.wiphy->interface_modes &
910                         BIT(NL80211_IFTYPE_NAN) &&
911                     (!local->ops->start_nan || !local->ops->stop_nan)))
912                 return -EINVAL;
913
914 #ifdef CONFIG_PM
915         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
916                 return -EINVAL;
917 #endif
918
919         if (!local->use_chanctx) {
920                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
921                         const struct ieee80211_iface_combination *comb;
922
923                         comb = &local->hw.wiphy->iface_combinations[i];
924
925                         if (comb->num_different_channels > 1)
926                                 return -EINVAL;
927                 }
928         } else {
929                 /*
930                  * WDS is currently prohibited when channel contexts are used
931                  * because there's no clear definition of which channel WDS
932                  * type interfaces use
933                  */
934                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
935                         return -EINVAL;
936
937                 /* DFS is not supported with multi-channel combinations yet */
938                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
939                         const struct ieee80211_iface_combination *comb;
940
941                         comb = &local->hw.wiphy->iface_combinations[i];
942
943                         if (comb->radar_detect_widths &&
944                             comb->num_different_channels > 1)
945                                 return -EINVAL;
946                 }
947         }
948
949         /* Only HW csum features are currently compatible with mac80211 */
950         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
951                 return -EINVAL;
952
953         if (hw->max_report_rates == 0)
954                 hw->max_report_rates = hw->max_rates;
955
956         local->rx_chains = 1;
957
958         /*
959          * generic code guarantees at least one band,
960          * set this very early because much code assumes
961          * that hw.conf.channel is assigned
962          */
963         channels = 0;
964         max_bitrates = 0;
965         supp_ht = false;
966         supp_vht = false;
967         supp_he = false;
968         for (band = 0; band < NUM_NL80211_BANDS; band++) {
969                 struct ieee80211_supported_band *sband;
970
971                 sband = local->hw.wiphy->bands[band];
972                 if (!sband)
973                         continue;
974
975                 if (!dflt_chandef.chan) {
976                         cfg80211_chandef_create(&dflt_chandef,
977                                                 &sband->channels[0],
978                                                 NL80211_CHAN_NO_HT);
979                         /* init channel we're on */
980                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
981                                 local->hw.conf.chandef = dflt_chandef;
982                                 local->_oper_chandef = dflt_chandef;
983                         }
984                         local->monitor_chandef = dflt_chandef;
985                 }
986
987                 channels += sband->n_channels;
988
989                 if (max_bitrates < sband->n_bitrates)
990                         max_bitrates = sband->n_bitrates;
991                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
992                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
993
994                 if (!supp_he)
995                         supp_he = !!ieee80211_get_he_sta_cap(sband);
996
997                 /* HT, VHT, HE require QoS, thus >= 4 queues */
998                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
999                             (supp_ht || supp_vht || supp_he)))
1000                         return -EINVAL;
1001
1002                 if (!sband->ht_cap.ht_supported)
1003                         continue;
1004
1005                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1006                 local->rx_chains =
1007                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1008                             local->rx_chains);
1009
1010                 /* no need to mask, SM_PS_DISABLED has all bits set */
1011                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1012                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1013         }
1014
1015         /* if low-level driver supports AP, we also support VLAN.
1016          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1017          * based on their support to transmit SW encrypted packets.
1018          */
1019         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1020             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1021                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1022                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1023         }
1024
1025         /* mac80211 always supports monitor */
1026         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1027         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1028
1029         /* mac80211 doesn't support more than one IBSS interface right now */
1030         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1031                 const struct ieee80211_iface_combination *c;
1032                 int j;
1033
1034                 c = &hw->wiphy->iface_combinations[i];
1035
1036                 for (j = 0; j < c->n_limits; j++)
1037                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1038                             c->limits[j].max > 1)
1039                                 return -EINVAL;
1040         }
1041
1042         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1043                                       sizeof(void *) * channels, GFP_KERNEL);
1044         if (!local->int_scan_req)
1045                 return -ENOMEM;
1046
1047         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1048                 if (!local->hw.wiphy->bands[band])
1049                         continue;
1050                 local->int_scan_req->rates[band] = (u32) -1;
1051         }
1052
1053 #ifndef CONFIG_MAC80211_MESH
1054         /* mesh depends on Kconfig, but drivers should set it if they want */
1055         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1056 #endif
1057
1058         /* if the underlying driver supports mesh, mac80211 will (at least)
1059          * provide routing of mesh authentication frames to userspace */
1060         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1061                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1062
1063         /* mac80211 supports control port protocol changing */
1064         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1065
1066         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1067                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1068         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1069                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1070                 if (hw->max_signal <= 0) {
1071                         result = -EINVAL;
1072                         goto fail_wiphy_register;
1073                 }
1074         }
1075
1076         /* Mac80211 and therefore all drivers using SW crypto only
1077          * are able to handle PTK rekeys and Extended Key ID.
1078          */
1079         if (!local->ops->set_key) {
1080                 wiphy_ext_feature_set(local->hw.wiphy,
1081                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1082                 wiphy_ext_feature_set(local->hw.wiphy,
1083                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1084         }
1085
1086         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1087                 wiphy_ext_feature_set(local->hw.wiphy,
1088                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1089
1090         /*
1091          * Calculate scan IE length -- we need this to alloc
1092          * memory and to subtract from the driver limit. It
1093          * includes the DS Params, (extended) supported rates, and HT
1094          * information -- SSID is the driver's responsibility.
1095          */
1096         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1097                 3 /* DS Params */;
1098         if (supp_ht)
1099                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1100
1101         if (supp_vht)
1102                 local->scan_ies_len +=
1103                         2 + sizeof(struct ieee80211_vht_cap);
1104
1105         /* HE cap element is variable in size - set len to allow max size */
1106         /*
1107          * TODO: 1 is added at the end of the calculation to accommodate for
1108          *      the temporary placing of the HE capabilities IE under EXT.
1109          *      Remove it once it is placed in the final place.
1110          */
1111         if (supp_he)
1112                 local->scan_ies_len +=
1113                         2 + sizeof(struct ieee80211_he_cap_elem) +
1114                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1115                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1116
1117         if (!local->ops->hw_scan) {
1118                 /* For hw_scan, driver needs to set these up. */
1119                 local->hw.wiphy->max_scan_ssids = 4;
1120                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1121         }
1122
1123         /*
1124          * If the driver supports any scan IEs, then assume the
1125          * limit includes the IEs mac80211 will add, otherwise
1126          * leave it at zero and let the driver sort it out; we
1127          * still pass our IEs to the driver but userspace will
1128          * not be allowed to in that case.
1129          */
1130         if (local->hw.wiphy->max_scan_ie_len)
1131                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1132
1133         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1134                                          local->hw.n_cipher_schemes));
1135
1136         result = ieee80211_init_cipher_suites(local);
1137         if (result < 0)
1138                 goto fail_wiphy_register;
1139
1140         if (!local->ops->remain_on_channel)
1141                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1142
1143         /* mac80211 based drivers don't support internal TDLS setup */
1144         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1145                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1146
1147         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1148         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1149                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1150
1151         /* mac80211 supports multi BSSID, if the driver supports it */
1152         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1153                 local->hw.wiphy->support_mbssid = true;
1154                 if (ieee80211_hw_check(&local->hw,
1155                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1156                         local->hw.wiphy->support_only_he_mbssid = true;
1157                 else
1158                         local->ext_capa[2] |=
1159                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1160         }
1161
1162         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1163
1164         result = wiphy_register(local->hw.wiphy);
1165         if (result < 0)
1166                 goto fail_wiphy_register;
1167
1168         /*
1169          * We use the number of queues for feature tests (QoS, HT) internally
1170          * so restrict them appropriately.
1171          */
1172         if (hw->queues > IEEE80211_MAX_QUEUES)
1173                 hw->queues = IEEE80211_MAX_QUEUES;
1174
1175         local->workqueue =
1176                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1177         if (!local->workqueue) {
1178                 result = -ENOMEM;
1179                 goto fail_workqueue;
1180         }
1181
1182         /*
1183          * The hardware needs headroom for sending the frame,
1184          * and we need some headroom for passing the frame to monitor
1185          * interfaces, but never both at the same time.
1186          */
1187         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1188                                    IEEE80211_TX_STATUS_HEADROOM);
1189
1190         debugfs_hw_add(local);
1191
1192         /*
1193          * if the driver doesn't specify a max listen interval we
1194          * use 5 which should be a safe default
1195          */
1196         if (local->hw.max_listen_interval == 0)
1197                 local->hw.max_listen_interval = 5;
1198
1199         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1200
1201         local->dynamic_ps_forced_timeout = -1;
1202
1203         if (!local->hw.max_nan_de_entries)
1204                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1205
1206         if (!local->hw.weight_multiplier)
1207                 local->hw.weight_multiplier = 1;
1208
1209         ieee80211_wep_init(local);
1210
1211         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1212
1213         ieee80211_led_init(local);
1214
1215         result = ieee80211_txq_setup_flows(local);
1216         if (result)
1217                 goto fail_flows;
1218
1219         rtnl_lock();
1220
1221         result = ieee80211_init_rate_ctrl_alg(local,
1222                                               hw->rate_control_algorithm);
1223         if (result < 0) {
1224                 wiphy_debug(local->hw.wiphy,
1225                             "Failed to initialize rate control algorithm\n");
1226                 goto fail_rate;
1227         }
1228
1229         if (local->rate_ctrl) {
1230                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1231                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1232                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1233         }
1234
1235         /*
1236          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1237          * or have it when we don't, copy the sband structure and set/clear it.
1238          * This is necessary because rate scaling algorithms could be switched
1239          * and have different support values.
1240          * Print a message so that in the common case the reallocation can be
1241          * avoided.
1242          */
1243         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1244         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1245                 struct ieee80211_supported_band *sband;
1246                 bool local_cap, ie_cap;
1247
1248                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1249
1250                 sband = local->hw.wiphy->bands[band];
1251                 if (!sband || !sband->vht_cap.vht_supported)
1252                         continue;
1253
1254                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1255                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1256
1257                 if (local_cap == ie_cap)
1258                         continue;
1259
1260                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1261                 if (!sband) {
1262                         result = -ENOMEM;
1263                         goto fail_rate;
1264                 }
1265
1266                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1267                           band);
1268
1269                 sband->vht_cap.vht_mcs.tx_highest ^=
1270                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1271
1272                 local->hw.wiphy->bands[band] = sband;
1273                 local->sband_allocated |= BIT(band);
1274         }
1275
1276         /* add one default STA interface if supported */
1277         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1278             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1279                 struct vif_params params = {0};
1280
1281                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1282                                           NL80211_IFTYPE_STATION, &params);
1283                 if (result)
1284                         wiphy_warn(local->hw.wiphy,
1285                                    "Failed to add default virtual iface\n");
1286         }
1287
1288         rtnl_unlock();
1289
1290 #ifdef CONFIG_INET
1291         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1292         result = register_inetaddr_notifier(&local->ifa_notifier);
1293         if (result)
1294                 goto fail_ifa;
1295 #endif
1296
1297 #if IS_ENABLED(CONFIG_IPV6)
1298         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1299         result = register_inet6addr_notifier(&local->ifa6_notifier);
1300         if (result)
1301                 goto fail_ifa6;
1302 #endif
1303
1304         return 0;
1305
1306 #if IS_ENABLED(CONFIG_IPV6)
1307  fail_ifa6:
1308 #ifdef CONFIG_INET
1309         unregister_inetaddr_notifier(&local->ifa_notifier);
1310 #endif
1311 #endif
1312 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1313  fail_ifa:
1314 #endif
1315         rtnl_lock();
1316         rate_control_deinitialize(local);
1317         ieee80211_remove_interfaces(local);
1318  fail_rate:
1319         rtnl_unlock();
1320  fail_flows:
1321         ieee80211_led_exit(local);
1322         destroy_workqueue(local->workqueue);
1323  fail_workqueue:
1324         wiphy_unregister(local->hw.wiphy);
1325  fail_wiphy_register:
1326         if (local->wiphy_ciphers_allocated)
1327                 kfree(local->hw.wiphy->cipher_suites);
1328         kfree(local->int_scan_req);
1329         return result;
1330 }
1331 EXPORT_SYMBOL(ieee80211_register_hw);
1332
1333 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1334 {
1335         struct ieee80211_local *local = hw_to_local(hw);
1336
1337         tasklet_kill(&local->tx_pending_tasklet);
1338         tasklet_kill(&local->tasklet);
1339
1340 #ifdef CONFIG_INET
1341         unregister_inetaddr_notifier(&local->ifa_notifier);
1342 #endif
1343 #if IS_ENABLED(CONFIG_IPV6)
1344         unregister_inet6addr_notifier(&local->ifa6_notifier);
1345 #endif
1346
1347         rtnl_lock();
1348
1349         /*
1350          * At this point, interface list manipulations are fine
1351          * because the driver cannot be handing us frames any
1352          * more and the tasklet is killed.
1353          */
1354         ieee80211_remove_interfaces(local);
1355
1356         rtnl_unlock();
1357
1358         cancel_delayed_work_sync(&local->roc_work);
1359         cancel_work_sync(&local->restart_work);
1360         cancel_work_sync(&local->reconfig_filter);
1361         cancel_work_sync(&local->tdls_chsw_work);
1362         flush_work(&local->sched_scan_stopped_work);
1363         flush_work(&local->radar_detected_work);
1364
1365         ieee80211_clear_tx_pending(local);
1366         rate_control_deinitialize(local);
1367
1368         if (skb_queue_len(&local->skb_queue) ||
1369             skb_queue_len(&local->skb_queue_unreliable))
1370                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1371         skb_queue_purge(&local->skb_queue);
1372         skb_queue_purge(&local->skb_queue_unreliable);
1373         skb_queue_purge(&local->skb_queue_tdls_chsw);
1374
1375         destroy_workqueue(local->workqueue);
1376         wiphy_unregister(local->hw.wiphy);
1377         ieee80211_led_exit(local);
1378         kfree(local->int_scan_req);
1379 }
1380 EXPORT_SYMBOL(ieee80211_unregister_hw);
1381
1382 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1383 {
1384         WARN_ONCE(1, "Have pending ack frames!\n");
1385         kfree_skb(p);
1386         return 0;
1387 }
1388
1389 void ieee80211_free_hw(struct ieee80211_hw *hw)
1390 {
1391         struct ieee80211_local *local = hw_to_local(hw);
1392         enum nl80211_band band;
1393
1394         mutex_destroy(&local->iflist_mtx);
1395         mutex_destroy(&local->mtx);
1396
1397         if (local->wiphy_ciphers_allocated)
1398                 kfree(local->hw.wiphy->cipher_suites);
1399
1400         idr_for_each(&local->ack_status_frames,
1401                      ieee80211_free_ack_frame, NULL);
1402         idr_destroy(&local->ack_status_frames);
1403
1404         sta_info_stop(local);
1405
1406         ieee80211_free_led_names(local);
1407
1408         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1409                 if (!(local->sband_allocated & BIT(band)))
1410                         continue;
1411                 kfree(local->hw.wiphy->bands[band]);
1412         }
1413
1414         wiphy_free(local->hw.wiphy);
1415 }
1416 EXPORT_SYMBOL(ieee80211_free_hw);
1417
1418 static int __init ieee80211_init(void)
1419 {
1420         struct sk_buff *skb;
1421         int ret;
1422
1423         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1424         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1425                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1426
1427         ret = rc80211_minstrel_init();
1428         if (ret)
1429                 return ret;
1430
1431         ret = ieee80211_iface_init();
1432         if (ret)
1433                 goto err_netdev;
1434
1435         return 0;
1436  err_netdev:
1437         rc80211_minstrel_exit();
1438
1439         return ret;
1440 }
1441
1442 static void __exit ieee80211_exit(void)
1443 {
1444         rc80211_minstrel_exit();
1445
1446         ieee80211s_stop();
1447
1448         ieee80211_iface_exit();
1449
1450         rcu_barrier();
1451 }
1452
1453
1454 subsys_initcall(ieee80211_init);
1455 module_exit(ieee80211_exit);
1456
1457 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1458 MODULE_LICENSE("GPL");