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) 2018-2021 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
ieee80211_configure_filter(struct ieee80211_local * local)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 if (local->rx_mcast_action_reg)
68 new_flags |= FIF_MCAST_ACTION;
69
70 spin_lock_bh(&local->filter_lock);
71 changed_flags = local->filter_flags ^ new_flags;
72
73 mc = drv_prepare_multicast(local, &local->mc_list);
74 spin_unlock_bh(&local->filter_lock);
75
76 /* be a bit nasty */
77 new_flags |= (1<<31);
78
79 drv_configure_filter(local, changed_flags, &new_flags, mc);
80
81 WARN_ON(new_flags & (1<<31));
82
83 local->filter_flags = new_flags & ~(1<<31);
84 }
85
ieee80211_reconfig_filter(struct work_struct * work)86 static void ieee80211_reconfig_filter(struct work_struct *work)
87 {
88 struct ieee80211_local *local =
89 container_of(work, struct ieee80211_local, reconfig_filter);
90
91 ieee80211_configure_filter(local);
92 }
93
ieee80211_hw_conf_chan(struct ieee80211_local * local)94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
95 {
96 struct ieee80211_sub_if_data *sdata;
97 struct cfg80211_chan_def chandef = {};
98 u32 changed = 0;
99 int power;
100 u32 offchannel_flag;
101
102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
103
104 if (local->scan_chandef.chan) {
105 chandef = local->scan_chandef;
106 } else if (local->tmp_channel) {
107 chandef.chan = local->tmp_channel;
108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
109 chandef.center_freq1 = chandef.chan->center_freq;
110 chandef.freq1_offset = chandef.chan->freq_offset;
111 } else
112 chandef = local->_oper_chandef;
113
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
116 chandef.chan->center_freq, chandef.chan->freq_offset,
117 chandef.width, chandef.center_freq1, chandef.freq1_offset,
118 chandef.center_freq2);
119
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 else
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 }
133
134 if (!conf_is_ht(&local->hw.conf)) {
135 /*
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
139 */
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
144 }
145
146 power = ieee80211_chandef_max_power(&chandef);
147
148 rcu_read_lock();
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151 continue;
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 continue;
154 if (sdata->vif.bss_conf.txpower == INT_MIN)
155 continue;
156 power = min(power, sdata->vif.bss_conf.txpower);
157 }
158 rcu_read_unlock();
159
160 if (local->hw.conf.power_level != power) {
161 changed |= IEEE80211_CONF_CHANGE_POWER;
162 local->hw.conf.power_level = power;
163 }
164
165 return changed;
166 }
167
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
169 {
170 int ret = 0;
171
172 might_sleep();
173
174 if (!local->use_chanctx)
175 changed |= ieee80211_hw_conf_chan(local);
176 else
177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
178 IEEE80211_CONF_CHANGE_POWER);
179
180 if (changed && local->open_count) {
181 ret = drv_config(local, changed);
182 /*
183 * Goal:
184 * HW reconfiguration should never fail, the driver has told
185 * us what it can support so it should live up to that promise.
186 *
187 * Current status:
188 * rfkill is not integrated with mac80211 and a
189 * configuration command can thus fail if hardware rfkill
190 * is enabled
191 *
192 * FIXME: integrate rfkill with mac80211 and then add this
193 * WARN_ON() back
194 *
195 */
196 /* WARN_ON(ret); */
197 }
198
199 return ret;
200 }
201
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u32 changed)202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
203 u32 changed)
204 {
205 struct ieee80211_local *local = sdata->local;
206
207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
208 return;
209
210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
211 }
212
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
214 {
215 sdata->vif.bss_conf.use_cts_prot = false;
216 sdata->vif.bss_conf.use_short_preamble = false;
217 sdata->vif.bss_conf.use_short_slot = false;
218 return BSS_CHANGED_ERP_CTS_PROT |
219 BSS_CHANGED_ERP_PREAMBLE |
220 BSS_CHANGED_ERP_SLOT;
221 }
222
ieee80211_tasklet_handler(struct tasklet_struct * t)223 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
224 {
225 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
226 struct sk_buff *skb;
227
228 while ((skb = skb_dequeue(&local->skb_queue)) ||
229 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
230 switch (skb->pkt_type) {
231 case IEEE80211_RX_MSG:
232 /* Clear skb->pkt_type in order to not confuse kernel
233 * netstack. */
234 skb->pkt_type = 0;
235 ieee80211_rx(&local->hw, skb);
236 break;
237 case IEEE80211_TX_STATUS_MSG:
238 skb->pkt_type = 0;
239 ieee80211_tx_status(&local->hw, skb);
240 break;
241 default:
242 WARN(1, "mac80211: Packet is of unknown type %d\n",
243 skb->pkt_type);
244 dev_kfree_skb(skb);
245 break;
246 }
247 }
248 }
249
ieee80211_restart_work(struct work_struct * work)250 static void ieee80211_restart_work(struct work_struct *work)
251 {
252 struct ieee80211_local *local =
253 container_of(work, struct ieee80211_local, restart_work);
254 struct ieee80211_sub_if_data *sdata;
255 int ret;
256
257 /* wait for scan work complete */
258 flush_workqueue(local->workqueue);
259 flush_work(&local->sched_scan_stopped_work);
260 flush_work(&local->radar_detected_work);
261
262 rtnl_lock();
263 /* we might do interface manipulations, so need both */
264 wiphy_lock(local->hw.wiphy);
265
266 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
267 "%s called with hardware scan in progress\n", __func__);
268
269 list_for_each_entry(sdata, &local->interfaces, list) {
270 /*
271 * XXX: there may be more work for other vif types and even
272 * for station mode: a good thing would be to run most of
273 * the iface type's dependent _stop (ieee80211_mg_stop,
274 * ieee80211_ibss_stop) etc...
275 * For now, fix only the specific bug that was seen: race
276 * between csa_connection_drop_work and us.
277 */
278 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
279 /*
280 * This worker is scheduled from the iface worker that
281 * runs on mac80211's workqueue, so we can't be
282 * scheduling this worker after the cancel right here.
283 * The exception is ieee80211_chswitch_done.
284 * Then we can have a race...
285 */
286 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
287 if (sdata->vif.csa_active) {
288 sdata_lock(sdata);
289 ieee80211_sta_connection_lost(sdata,
290 sdata->u.mgd.associated->bssid,
291 WLAN_REASON_UNSPECIFIED, false);
292 sdata_unlock(sdata);
293 }
294 }
295 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
296 }
297 ieee80211_scan_cancel(local);
298
299 /* make sure any new ROC will consider local->in_reconfig */
300 flush_delayed_work(&local->roc_work);
301 flush_work(&local->hw_roc_done);
302
303 /* wait for all packet processing to be done */
304 synchronize_net();
305
306 ret = ieee80211_reconfig(local);
307 wiphy_unlock(local->hw.wiphy);
308
309 if (ret)
310 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
311
312 rtnl_unlock();
313 }
314
ieee80211_restart_hw(struct ieee80211_hw * hw)315 void ieee80211_restart_hw(struct ieee80211_hw *hw)
316 {
317 struct ieee80211_local *local = hw_to_local(hw);
318
319 trace_api_restart_hw(local);
320
321 wiphy_info(hw->wiphy,
322 "Hardware restart was requested\n");
323
324 /* use this reason, ieee80211_reconfig will unblock it */
325 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
326 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
327 false);
328
329 /*
330 * Stop all Rx during the reconfig. We don't want state changes
331 * or driver callbacks while this is in progress.
332 */
333 local->in_reconfig = true;
334 barrier();
335
336 queue_work(system_freezable_wq, &local->restart_work);
337 }
338 EXPORT_SYMBOL(ieee80211_restart_hw);
339
340 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)341 static int ieee80211_ifa_changed(struct notifier_block *nb,
342 unsigned long data, void *arg)
343 {
344 struct in_ifaddr *ifa = arg;
345 struct ieee80211_local *local =
346 container_of(nb, struct ieee80211_local,
347 ifa_notifier);
348 struct net_device *ndev = ifa->ifa_dev->dev;
349 struct wireless_dev *wdev = ndev->ieee80211_ptr;
350 struct in_device *idev;
351 struct ieee80211_sub_if_data *sdata;
352 struct ieee80211_bss_conf *bss_conf;
353 struct ieee80211_if_managed *ifmgd;
354 int c = 0;
355
356 /* Make sure it's our interface that got changed */
357 if (!wdev)
358 return NOTIFY_DONE;
359
360 if (wdev->wiphy != local->hw.wiphy)
361 return NOTIFY_DONE;
362
363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
364 bss_conf = &sdata->vif.bss_conf;
365
366 /* ARP filtering is only supported in managed mode */
367 if (sdata->vif.type != NL80211_IFTYPE_STATION)
368 return NOTIFY_DONE;
369
370 idev = __in_dev_get_rtnl(sdata->dev);
371 if (!idev)
372 return NOTIFY_DONE;
373
374 ifmgd = &sdata->u.mgd;
375 sdata_lock(sdata);
376
377 /* Copy the addresses to the bss_conf list */
378 ifa = rtnl_dereference(idev->ifa_list);
379 while (ifa) {
380 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
381 bss_conf->arp_addr_list[c] = ifa->ifa_address;
382 ifa = rtnl_dereference(ifa->ifa_next);
383 c++;
384 }
385
386 bss_conf->arp_addr_cnt = c;
387
388 /* Configure driver only if associated (which also implies it is up) */
389 if (ifmgd->associated)
390 ieee80211_bss_info_change_notify(sdata,
391 BSS_CHANGED_ARP_FILTER);
392
393 sdata_unlock(sdata);
394
395 return NOTIFY_OK;
396 }
397 #endif
398
399 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)400 static int ieee80211_ifa6_changed(struct notifier_block *nb,
401 unsigned long data, void *arg)
402 {
403 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
404 struct inet6_dev *idev = ifa->idev;
405 struct net_device *ndev = ifa->idev->dev;
406 struct ieee80211_local *local =
407 container_of(nb, struct ieee80211_local, ifa6_notifier);
408 struct wireless_dev *wdev = ndev->ieee80211_ptr;
409 struct ieee80211_sub_if_data *sdata;
410
411 /* Make sure it's our interface that got changed */
412 if (!wdev || wdev->wiphy != local->hw.wiphy)
413 return NOTIFY_DONE;
414
415 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
416
417 /*
418 * For now only support station mode. This is mostly because
419 * doing AP would have to handle AP_VLAN in some way ...
420 */
421 if (sdata->vif.type != NL80211_IFTYPE_STATION)
422 return NOTIFY_DONE;
423
424 drv_ipv6_addr_change(local, sdata, idev);
425
426 return NOTIFY_OK;
427 }
428 #endif
429
430 /* There isn't a lot of sense in it, but you can transmit anything you like */
431 static const struct ieee80211_txrx_stypes
432 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
433 [NL80211_IFTYPE_ADHOC] = {
434 .tx = 0xffff,
435 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
436 BIT(IEEE80211_STYPE_AUTH >> 4) |
437 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
439 },
440 [NL80211_IFTYPE_STATION] = {
441 .tx = 0xffff,
442 /*
443 * To support Pre Association Security Negotiation (PASN) while
444 * already associated to one AP, allow user space to register to
445 * Rx authentication frames, so that the user space logic would
446 * be able to receive/handle authentication frames from a
447 * different AP as part of PASN.
448 * It is expected that user space would intelligently register
449 * for Rx authentication frames, i.e., only when PASN is used
450 * and configure a match filter only for PASN authentication
451 * algorithm, as otherwise the MLME functionality of mac80211
452 * would be broken.
453 */
454 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
455 BIT(IEEE80211_STYPE_AUTH >> 4) |
456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
457 },
458 [NL80211_IFTYPE_AP] = {
459 .tx = 0xffff,
460 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
461 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
462 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
463 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
464 BIT(IEEE80211_STYPE_AUTH >> 4) |
465 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
466 BIT(IEEE80211_STYPE_ACTION >> 4),
467 },
468 [NL80211_IFTYPE_AP_VLAN] = {
469 /* copy AP */
470 .tx = 0xffff,
471 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
472 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
473 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
474 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
475 BIT(IEEE80211_STYPE_AUTH >> 4) |
476 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
477 BIT(IEEE80211_STYPE_ACTION >> 4),
478 },
479 [NL80211_IFTYPE_P2P_CLIENT] = {
480 .tx = 0xffff,
481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
483 },
484 [NL80211_IFTYPE_P2P_GO] = {
485 .tx = 0xffff,
486 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
487 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
488 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
489 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
490 BIT(IEEE80211_STYPE_AUTH >> 4) |
491 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
492 BIT(IEEE80211_STYPE_ACTION >> 4),
493 },
494 [NL80211_IFTYPE_MESH_POINT] = {
495 .tx = 0xffff,
496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
497 BIT(IEEE80211_STYPE_AUTH >> 4) |
498 BIT(IEEE80211_STYPE_DEAUTH >> 4),
499 },
500 [NL80211_IFTYPE_P2P_DEVICE] = {
501 .tx = 0xffff,
502 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
503 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
504 },
505 };
506
507 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
508 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
509 IEEE80211_HT_AMPDU_PARM_DENSITY,
510
511 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
512 IEEE80211_HT_CAP_MAX_AMSDU |
513 IEEE80211_HT_CAP_SGI_20 |
514 IEEE80211_HT_CAP_SGI_40 |
515 IEEE80211_HT_CAP_TX_STBC |
516 IEEE80211_HT_CAP_RX_STBC |
517 IEEE80211_HT_CAP_LDPC_CODING |
518 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
519 .mcs = {
520 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
521 0xff, 0xff, 0xff, 0xff, 0xff, },
522 },
523 };
524
525 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
526 .vht_cap_info =
527 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
528 IEEE80211_VHT_CAP_SHORT_GI_80 |
529 IEEE80211_VHT_CAP_SHORT_GI_160 |
530 IEEE80211_VHT_CAP_RXSTBC_MASK |
531 IEEE80211_VHT_CAP_TXSTBC |
532 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
533 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
534 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
535 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
536 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
537 .supp_mcs = {
538 .rx_mcs_map = cpu_to_le16(~0),
539 .tx_mcs_map = cpu_to_le16(~0),
540 },
541 };
542
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)543 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
544 const struct ieee80211_ops *ops,
545 const char *requested_name)
546 {
547 struct ieee80211_local *local;
548 int priv_size, i;
549 struct wiphy *wiphy;
550 bool use_chanctx;
551
552 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
553 !ops->add_interface || !ops->remove_interface ||
554 !ops->configure_filter))
555 return NULL;
556
557 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
558 return NULL;
559
560 /* check all or no channel context operations exist */
561 i = !!ops->add_chanctx + !!ops->remove_chanctx +
562 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
563 !!ops->unassign_vif_chanctx;
564 if (WARN_ON(i != 0 && i != 5))
565 return NULL;
566 use_chanctx = i == 5;
567
568 /* Ensure 32-byte alignment of our private data and hw private data.
569 * We use the wiphy priv data for both our ieee80211_local and for
570 * the driver's private data
571 *
572 * In memory it'll be like this:
573 *
574 * +-------------------------+
575 * | struct wiphy |
576 * +-------------------------+
577 * | struct ieee80211_local |
578 * +-------------------------+
579 * | driver's private data |
580 * +-------------------------+
581 *
582 */
583 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
584
585 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
586
587 if (!wiphy)
588 return NULL;
589
590 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
591
592 wiphy->privid = mac80211_wiphy_privid;
593
594 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
595 WIPHY_FLAG_4ADDR_AP |
596 WIPHY_FLAG_4ADDR_STATION |
597 WIPHY_FLAG_REPORTS_OBSS |
598 WIPHY_FLAG_OFFCHAN_TX;
599
600 if (!use_chanctx || ops->remain_on_channel)
601 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
602
603 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
604 NL80211_FEATURE_SAE |
605 NL80211_FEATURE_HT_IBSS |
606 NL80211_FEATURE_VIF_TXPOWER |
607 NL80211_FEATURE_MAC_ON_CREATE |
608 NL80211_FEATURE_USERSPACE_MPM |
609 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
610 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
611 wiphy_ext_feature_set(wiphy,
612 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
613 wiphy_ext_feature_set(wiphy,
614 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
615 wiphy_ext_feature_set(wiphy,
616 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
617 wiphy_ext_feature_set(wiphy,
618 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
619
620 if (!ops->hw_scan) {
621 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
622 NL80211_FEATURE_AP_SCAN;
623 /*
624 * if the driver behaves correctly using the probe request
625 * (template) from mac80211, then both of these should be
626 * supported even with hw scan - but let drivers opt in.
627 */
628 wiphy_ext_feature_set(wiphy,
629 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
630 wiphy_ext_feature_set(wiphy,
631 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
632 }
633
634 if (!ops->set_key)
635 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
636
637 if (ops->wake_tx_queue)
638 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
639
640 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
641
642 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
643
644 local = wiphy_priv(wiphy);
645
646 if (sta_info_init(local))
647 goto err_free;
648
649 local->hw.wiphy = wiphy;
650
651 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
652
653 local->ops = ops;
654 local->use_chanctx = use_chanctx;
655
656 /*
657 * We need a bit of data queued to build aggregates properly, so
658 * instruct the TCP stack to allow more than a single ms of data
659 * to be queued in the stack. The value is a bit-shift of 1
660 * second, so 7 is ~8ms of queued data. Only affects local TCP
661 * sockets.
662 * This is the default, anyhow - drivers may need to override it
663 * for local reasons (longer buffers, longer completion time, or
664 * similar).
665 */
666 local->hw.tx_sk_pacing_shift = 7;
667
668 /* set up some defaults */
669 local->hw.queues = 1;
670 local->hw.max_rates = 1;
671 local->hw.max_report_rates = 0;
672 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
673 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
674 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
675 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
676 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
677 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
678 IEEE80211_RADIOTAP_MCS_HAVE_GI |
679 IEEE80211_RADIOTAP_MCS_HAVE_BW;
680 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
681 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
682 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
683 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
684 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
685 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
686 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
687 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
688
689 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
690
691 wiphy->extended_capabilities = local->ext_capa;
692 wiphy->extended_capabilities_mask = local->ext_capa;
693 wiphy->extended_capabilities_len =
694 ARRAY_SIZE(local->ext_capa);
695
696 INIT_LIST_HEAD(&local->interfaces);
697 INIT_LIST_HEAD(&local->mon_list);
698
699 __hw_addr_init(&local->mc_list);
700
701 mutex_init(&local->iflist_mtx);
702 mutex_init(&local->mtx);
703
704 mutex_init(&local->key_mtx);
705 spin_lock_init(&local->filter_lock);
706 spin_lock_init(&local->rx_path_lock);
707 spin_lock_init(&local->queue_stop_reason_lock);
708
709 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
710 struct airtime_sched_info *air_sched = &local->airtime[i];
711
712 air_sched->active_txqs = RB_ROOT_CACHED;
713 INIT_LIST_HEAD(&air_sched->active_list);
714 spin_lock_init(&air_sched->lock);
715 air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
716 air_sched->aql_txq_limit_high =
717 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
718 }
719
720 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
721 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
722 atomic_set(&local->aql_total_pending_airtime, 0);
723
724 INIT_LIST_HEAD(&local->chanctx_list);
725 mutex_init(&local->chanctx_mtx);
726
727 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
728
729 INIT_WORK(&local->restart_work, ieee80211_restart_work);
730
731 INIT_WORK(&local->radar_detected_work,
732 ieee80211_dfs_radar_detected_work);
733
734 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
735 local->smps_mode = IEEE80211_SMPS_OFF;
736
737 INIT_WORK(&local->dynamic_ps_enable_work,
738 ieee80211_dynamic_ps_enable_work);
739 INIT_WORK(&local->dynamic_ps_disable_work,
740 ieee80211_dynamic_ps_disable_work);
741 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
742
743 INIT_WORK(&local->sched_scan_stopped_work,
744 ieee80211_sched_scan_stopped_work);
745
746 spin_lock_init(&local->ack_status_lock);
747 idr_init(&local->ack_status_frames);
748
749 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
750 skb_queue_head_init(&local->pending[i]);
751 atomic_set(&local->agg_queue_stop[i], 0);
752 }
753 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
754
755 if (ops->wake_tx_queue)
756 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
757
758 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
759
760 skb_queue_head_init(&local->skb_queue);
761 skb_queue_head_init(&local->skb_queue_unreliable);
762
763 ieee80211_alloc_led_names(local);
764
765 ieee80211_roc_setup(local);
766
767 local->hw.radiotap_timestamp.units_pos = -1;
768 local->hw.radiotap_timestamp.accuracy = -1;
769
770 return &local->hw;
771 err_free:
772 wiphy_free(wiphy);
773 return NULL;
774 }
775 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
776
ieee80211_init_cipher_suites(struct ieee80211_local * local)777 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
778 {
779 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
780 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
781 int n_suites = 0, r = 0, w = 0;
782 u32 *suites;
783 static const u32 cipher_suites[] = {
784 /* keep WEP first, it may be removed below */
785 WLAN_CIPHER_SUITE_WEP40,
786 WLAN_CIPHER_SUITE_WEP104,
787 WLAN_CIPHER_SUITE_TKIP,
788 WLAN_CIPHER_SUITE_CCMP,
789 WLAN_CIPHER_SUITE_CCMP_256,
790 WLAN_CIPHER_SUITE_GCMP,
791 WLAN_CIPHER_SUITE_GCMP_256,
792
793 /* keep last -- depends on hw flags! */
794 WLAN_CIPHER_SUITE_AES_CMAC,
795 WLAN_CIPHER_SUITE_BIP_CMAC_256,
796 WLAN_CIPHER_SUITE_BIP_GMAC_128,
797 WLAN_CIPHER_SUITE_BIP_GMAC_256,
798 };
799
800 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
801 local->hw.wiphy->cipher_suites) {
802 /* If the driver advertises, or doesn't support SW crypto,
803 * we only need to remove WEP if necessary.
804 */
805 if (have_wep)
806 return 0;
807
808 /* well if it has _no_ ciphers ... fine */
809 if (!local->hw.wiphy->n_cipher_suites)
810 return 0;
811
812 /* Driver provides cipher suites, but we need to exclude WEP */
813 suites = kmemdup(local->hw.wiphy->cipher_suites,
814 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
815 GFP_KERNEL);
816 if (!suites)
817 return -ENOMEM;
818
819 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
820 u32 suite = local->hw.wiphy->cipher_suites[r];
821
822 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
823 suite == WLAN_CIPHER_SUITE_WEP104)
824 continue;
825 suites[w++] = suite;
826 }
827 } else if (!local->hw.cipher_schemes) {
828 /* If the driver doesn't have cipher schemes, there's nothing
829 * else to do other than assign the (software supported and
830 * perhaps offloaded) cipher suites.
831 */
832 local->hw.wiphy->cipher_suites = cipher_suites;
833 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
834
835 if (!have_mfp)
836 local->hw.wiphy->n_cipher_suites -= 4;
837
838 if (!have_wep) {
839 local->hw.wiphy->cipher_suites += 2;
840 local->hw.wiphy->n_cipher_suites -= 2;
841 }
842
843 /* not dynamically allocated, so just return */
844 return 0;
845 } else {
846 const struct ieee80211_cipher_scheme *cs;
847
848 cs = local->hw.cipher_schemes;
849
850 /* Driver specifies cipher schemes only (but not cipher suites
851 * including the schemes)
852 *
853 * We start counting ciphers defined by schemes, TKIP, CCMP,
854 * CCMP-256, GCMP, and GCMP-256
855 */
856 n_suites = local->hw.n_cipher_schemes + 5;
857
858 /* check if we have WEP40 and WEP104 */
859 if (have_wep)
860 n_suites += 2;
861
862 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
863 * BIP-GMAC-256
864 */
865 if (have_mfp)
866 n_suites += 4;
867
868 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
869 if (!suites)
870 return -ENOMEM;
871
872 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
873 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
874 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
875 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
876 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
877
878 if (have_wep) {
879 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
880 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
881 }
882
883 if (have_mfp) {
884 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
885 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
886 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
887 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
888 }
889
890 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
891 suites[w++] = cs[r].cipher;
892 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
893 kfree(suites);
894 return -EINVAL;
895 }
896 }
897 }
898
899 local->hw.wiphy->cipher_suites = suites;
900 local->hw.wiphy->n_cipher_suites = w;
901 local->wiphy_ciphers_allocated = true;
902
903 return 0;
904 }
905
ieee80211_register_hw(struct ieee80211_hw * hw)906 int ieee80211_register_hw(struct ieee80211_hw *hw)
907 {
908 struct ieee80211_local *local = hw_to_local(hw);
909 int result, i;
910 enum nl80211_band band;
911 int channels, max_bitrates;
912 bool supp_ht, supp_vht, supp_he;
913 struct cfg80211_chan_def dflt_chandef = {};
914
915 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
916 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
917 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
918 return -EINVAL;
919
920 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
921 (!local->ops->tdls_channel_switch ||
922 !local->ops->tdls_cancel_channel_switch ||
923 !local->ops->tdls_recv_channel_switch))
924 return -EOPNOTSUPP;
925
926 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
927 !local->ops->set_frag_threshold))
928 return -EINVAL;
929
930 if (WARN_ON(local->hw.wiphy->interface_modes &
931 BIT(NL80211_IFTYPE_NAN) &&
932 (!local->ops->start_nan || !local->ops->stop_nan)))
933 return -EINVAL;
934
935 #ifdef CONFIG_PM
936 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
937 return -EINVAL;
938 #endif
939
940 if (!local->use_chanctx) {
941 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
942 const struct ieee80211_iface_combination *comb;
943
944 comb = &local->hw.wiphy->iface_combinations[i];
945
946 if (comb->num_different_channels > 1)
947 return -EINVAL;
948 }
949 } else {
950 /* DFS is not supported with multi-channel combinations yet */
951 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
952 const struct ieee80211_iface_combination *comb;
953
954 comb = &local->hw.wiphy->iface_combinations[i];
955
956 if (comb->radar_detect_widths &&
957 comb->num_different_channels > 1)
958 return -EINVAL;
959 }
960 }
961
962 /* Only HW csum features are currently compatible with mac80211 */
963 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
964 return -EINVAL;
965
966 if (hw->max_report_rates == 0)
967 hw->max_report_rates = hw->max_rates;
968
969 local->rx_chains = 1;
970
971 /*
972 * generic code guarantees at least one band,
973 * set this very early because much code assumes
974 * that hw.conf.channel is assigned
975 */
976 channels = 0;
977 max_bitrates = 0;
978 supp_ht = false;
979 supp_vht = false;
980 supp_he = false;
981 for (band = 0; band < NUM_NL80211_BANDS; band++) {
982 struct ieee80211_supported_band *sband;
983
984 sband = local->hw.wiphy->bands[band];
985 if (!sband)
986 continue;
987
988 if (!dflt_chandef.chan) {
989 /*
990 * Assign the first enabled channel to dflt_chandef
991 * from the list of channels
992 */
993 for (i = 0; i < sband->n_channels; i++)
994 if (!(sband->channels[i].flags &
995 IEEE80211_CHAN_DISABLED))
996 break;
997 /* if none found then use the first anyway */
998 if (i == sband->n_channels)
999 i = 0;
1000 cfg80211_chandef_create(&dflt_chandef,
1001 &sband->channels[i],
1002 NL80211_CHAN_NO_HT);
1003 /* init channel we're on */
1004 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1005 local->hw.conf.chandef = dflt_chandef;
1006 local->_oper_chandef = dflt_chandef;
1007 }
1008 local->monitor_chandef = dflt_chandef;
1009 }
1010
1011 channels += sband->n_channels;
1012
1013 if (max_bitrates < sband->n_bitrates)
1014 max_bitrates = sband->n_bitrates;
1015 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1016 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1017
1018 for (i = 0; i < sband->n_iftype_data; i++) {
1019 const struct ieee80211_sband_iftype_data *iftd;
1020
1021 iftd = &sband->iftype_data[i];
1022
1023 supp_he = supp_he || iftd->he_cap.has_he;
1024 }
1025
1026 /* HT, VHT, HE require QoS, thus >= 4 queues */
1027 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1028 (supp_ht || supp_vht || supp_he)))
1029 return -EINVAL;
1030
1031 if (!sband->ht_cap.ht_supported)
1032 continue;
1033
1034 /* TODO: consider VHT for RX chains, hopefully it's the same */
1035 local->rx_chains =
1036 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1037 local->rx_chains);
1038
1039 /* no need to mask, SM_PS_DISABLED has all bits set */
1040 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1041 IEEE80211_HT_CAP_SM_PS_SHIFT;
1042 }
1043
1044 /* if low-level driver supports AP, we also support VLAN.
1045 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1046 * based on their support to transmit SW encrypted packets.
1047 */
1048 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1049 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1050 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1051 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1052 }
1053
1054 /* mac80211 always supports monitor */
1055 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1056 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1057
1058 /* mac80211 doesn't support more than one IBSS interface right now */
1059 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1060 const struct ieee80211_iface_combination *c;
1061 int j;
1062
1063 c = &hw->wiphy->iface_combinations[i];
1064
1065 for (j = 0; j < c->n_limits; j++)
1066 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1067 c->limits[j].max > 1)
1068 return -EINVAL;
1069 }
1070
1071 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1072 sizeof(void *) * channels, GFP_KERNEL);
1073 if (!local->int_scan_req)
1074 return -ENOMEM;
1075
1076 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1077 if (!local->hw.wiphy->bands[band])
1078 continue;
1079 local->int_scan_req->rates[band] = (u32) -1;
1080 }
1081
1082 #ifndef CONFIG_MAC80211_MESH
1083 /* mesh depends on Kconfig, but drivers should set it if they want */
1084 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1085 #endif
1086
1087 /* if the underlying driver supports mesh, mac80211 will (at least)
1088 * provide routing of mesh authentication frames to userspace */
1089 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1090 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1091
1092 /* mac80211 supports control port protocol changing */
1093 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1094
1095 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1096 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1097 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1098 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1099 if (hw->max_signal <= 0) {
1100 result = -EINVAL;
1101 goto fail_workqueue;
1102 }
1103 }
1104
1105 /* Mac80211 and therefore all drivers using SW crypto only
1106 * are able to handle PTK rekeys and Extended Key ID.
1107 */
1108 if (!local->ops->set_key) {
1109 wiphy_ext_feature_set(local->hw.wiphy,
1110 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1111 wiphy_ext_feature_set(local->hw.wiphy,
1112 NL80211_EXT_FEATURE_EXT_KEY_ID);
1113 }
1114
1115 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1116 wiphy_ext_feature_set(local->hw.wiphy,
1117 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1118
1119 /*
1120 * Calculate scan IE length -- we need this to alloc
1121 * memory and to subtract from the driver limit. It
1122 * includes the DS Params, (extended) supported rates, and HT
1123 * information -- SSID is the driver's responsibility.
1124 */
1125 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1126 3 /* DS Params */;
1127 if (supp_ht)
1128 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1129
1130 if (supp_vht)
1131 local->scan_ies_len +=
1132 2 + sizeof(struct ieee80211_vht_cap);
1133
1134 /* HE cap element is variable in size - set len to allow max size */
1135 /*
1136 * TODO: 1 is added at the end of the calculation to accommodate for
1137 * the temporary placing of the HE capabilities IE under EXT.
1138 * Remove it once it is placed in the final place.
1139 */
1140 if (supp_he)
1141 local->scan_ies_len +=
1142 2 + sizeof(struct ieee80211_he_cap_elem) +
1143 sizeof(struct ieee80211_he_mcs_nss_supp) +
1144 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1145
1146 if (!local->ops->hw_scan) {
1147 /* For hw_scan, driver needs to set these up. */
1148 local->hw.wiphy->max_scan_ssids = 4;
1149 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1150 }
1151
1152 /*
1153 * If the driver supports any scan IEs, then assume the
1154 * limit includes the IEs mac80211 will add, otherwise
1155 * leave it at zero and let the driver sort it out; we
1156 * still pass our IEs to the driver but userspace will
1157 * not be allowed to in that case.
1158 */
1159 if (local->hw.wiphy->max_scan_ie_len)
1160 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1161
1162 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1163 local->hw.n_cipher_schemes))) {
1164 result = -EINVAL;
1165 goto fail_workqueue;
1166 }
1167
1168 result = ieee80211_init_cipher_suites(local);
1169 if (result < 0)
1170 goto fail_workqueue;
1171
1172 if (!local->ops->remain_on_channel)
1173 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1174
1175 /* mac80211 based drivers don't support internal TDLS setup */
1176 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1177 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1178
1179 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1180 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1181 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1182
1183 /* mac80211 supports multi BSSID, if the driver supports it */
1184 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1185 local->hw.wiphy->support_mbssid = true;
1186 if (ieee80211_hw_check(&local->hw,
1187 SUPPORTS_ONLY_HE_MULTI_BSSID))
1188 local->hw.wiphy->support_only_he_mbssid = true;
1189 else
1190 local->ext_capa[2] |=
1191 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1192 }
1193
1194 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1195
1196 /*
1197 * We use the number of queues for feature tests (QoS, HT) internally
1198 * so restrict them appropriately.
1199 */
1200 if (hw->queues > IEEE80211_MAX_QUEUES)
1201 hw->queues = IEEE80211_MAX_QUEUES;
1202
1203 local->workqueue =
1204 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1205 if (!local->workqueue) {
1206 result = -ENOMEM;
1207 goto fail_workqueue;
1208 }
1209
1210 /*
1211 * The hardware needs headroom for sending the frame,
1212 * and we need some headroom for passing the frame to monitor
1213 * interfaces, but never both at the same time.
1214 */
1215 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1216 IEEE80211_TX_STATUS_HEADROOM);
1217
1218 /*
1219 * if the driver doesn't specify a max listen interval we
1220 * use 5 which should be a safe default
1221 */
1222 if (local->hw.max_listen_interval == 0)
1223 local->hw.max_listen_interval = 5;
1224
1225 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1226
1227 local->dynamic_ps_forced_timeout = -1;
1228
1229 if (!local->hw.max_nan_de_entries)
1230 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1231
1232 if (!local->hw.weight_multiplier)
1233 local->hw.weight_multiplier = 1;
1234
1235 ieee80211_wep_init(local);
1236
1237 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1238
1239 ieee80211_led_init(local);
1240
1241 result = ieee80211_txq_setup_flows(local);
1242 if (result)
1243 goto fail_flows;
1244
1245 rtnl_lock();
1246 result = ieee80211_init_rate_ctrl_alg(local,
1247 hw->rate_control_algorithm);
1248 rtnl_unlock();
1249 if (result < 0) {
1250 wiphy_debug(local->hw.wiphy,
1251 "Failed to initialize rate control algorithm\n");
1252 goto fail_rate;
1253 }
1254
1255 if (local->rate_ctrl) {
1256 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1257 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1258 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1259 }
1260
1261 /*
1262 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1263 * or have it when we don't, copy the sband structure and set/clear it.
1264 * This is necessary because rate scaling algorithms could be switched
1265 * and have different support values.
1266 * Print a message so that in the common case the reallocation can be
1267 * avoided.
1268 */
1269 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1270 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1271 struct ieee80211_supported_band *sband;
1272 bool local_cap, ie_cap;
1273
1274 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1275
1276 sband = local->hw.wiphy->bands[band];
1277 if (!sband || !sband->vht_cap.vht_supported)
1278 continue;
1279
1280 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1281 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1282
1283 if (local_cap == ie_cap)
1284 continue;
1285
1286 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1287 if (!sband) {
1288 result = -ENOMEM;
1289 goto fail_rate;
1290 }
1291
1292 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1293 band);
1294
1295 sband->vht_cap.vht_mcs.tx_highest ^=
1296 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1297
1298 local->hw.wiphy->bands[band] = sband;
1299 local->sband_allocated |= BIT(band);
1300 }
1301
1302 result = wiphy_register(local->hw.wiphy);
1303 if (result < 0)
1304 goto fail_wiphy_register;
1305
1306 debugfs_hw_add(local);
1307 rate_control_add_debugfs(local);
1308
1309 rtnl_lock();
1310 wiphy_lock(hw->wiphy);
1311
1312 /* add one default STA interface if supported */
1313 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1314 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1315 struct vif_params params = {0};
1316
1317 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1318 NL80211_IFTYPE_STATION, ¶ms);
1319 if (result)
1320 wiphy_warn(local->hw.wiphy,
1321 "Failed to add default virtual iface\n");
1322 }
1323
1324 wiphy_unlock(hw->wiphy);
1325 rtnl_unlock();
1326
1327 #ifdef CONFIG_INET
1328 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1329 result = register_inetaddr_notifier(&local->ifa_notifier);
1330 if (result)
1331 goto fail_ifa;
1332 #endif
1333
1334 #if IS_ENABLED(CONFIG_IPV6)
1335 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1336 result = register_inet6addr_notifier(&local->ifa6_notifier);
1337 if (result)
1338 goto fail_ifa6;
1339 #endif
1340
1341 return 0;
1342
1343 #if IS_ENABLED(CONFIG_IPV6)
1344 fail_ifa6:
1345 #ifdef CONFIG_INET
1346 unregister_inetaddr_notifier(&local->ifa_notifier);
1347 #endif
1348 #endif
1349 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1350 fail_ifa:
1351 #endif
1352 wiphy_unregister(local->hw.wiphy);
1353 fail_wiphy_register:
1354 rtnl_lock();
1355 rate_control_deinitialize(local);
1356 ieee80211_remove_interfaces(local);
1357 rtnl_unlock();
1358 fail_rate:
1359 fail_flows:
1360 ieee80211_led_exit(local);
1361 destroy_workqueue(local->workqueue);
1362 fail_workqueue:
1363 if (local->wiphy_ciphers_allocated)
1364 kfree(local->hw.wiphy->cipher_suites);
1365 kfree(local->int_scan_req);
1366 return result;
1367 }
1368 EXPORT_SYMBOL(ieee80211_register_hw);
1369
ieee80211_unregister_hw(struct ieee80211_hw * hw)1370 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1371 {
1372 struct ieee80211_local *local = hw_to_local(hw);
1373
1374 tasklet_kill(&local->tx_pending_tasklet);
1375 tasklet_kill(&local->tasklet);
1376
1377 #ifdef CONFIG_INET
1378 unregister_inetaddr_notifier(&local->ifa_notifier);
1379 #endif
1380 #if IS_ENABLED(CONFIG_IPV6)
1381 unregister_inet6addr_notifier(&local->ifa6_notifier);
1382 #endif
1383
1384 rtnl_lock();
1385
1386 /*
1387 * At this point, interface list manipulations are fine
1388 * because the driver cannot be handing us frames any
1389 * more and the tasklet is killed.
1390 */
1391 ieee80211_remove_interfaces(local);
1392
1393 rtnl_unlock();
1394
1395 cancel_delayed_work_sync(&local->roc_work);
1396 cancel_work_sync(&local->restart_work);
1397 cancel_work_sync(&local->reconfig_filter);
1398 flush_work(&local->sched_scan_stopped_work);
1399 flush_work(&local->radar_detected_work);
1400
1401 ieee80211_clear_tx_pending(local);
1402 rate_control_deinitialize(local);
1403
1404 if (skb_queue_len(&local->skb_queue) ||
1405 skb_queue_len(&local->skb_queue_unreliable))
1406 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1407 skb_queue_purge(&local->skb_queue);
1408 skb_queue_purge(&local->skb_queue_unreliable);
1409
1410 wiphy_unregister(local->hw.wiphy);
1411 destroy_workqueue(local->workqueue);
1412 ieee80211_led_exit(local);
1413 kfree(local->int_scan_req);
1414 }
1415 EXPORT_SYMBOL(ieee80211_unregister_hw);
1416
ieee80211_free_ack_frame(int id,void * p,void * data)1417 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1418 {
1419 WARN_ONCE(1, "Have pending ack frames!\n");
1420 kfree_skb(p);
1421 return 0;
1422 }
1423
ieee80211_free_hw(struct ieee80211_hw * hw)1424 void ieee80211_free_hw(struct ieee80211_hw *hw)
1425 {
1426 struct ieee80211_local *local = hw_to_local(hw);
1427 enum nl80211_band band;
1428
1429 mutex_destroy(&local->iflist_mtx);
1430 mutex_destroy(&local->mtx);
1431
1432 if (local->wiphy_ciphers_allocated)
1433 kfree(local->hw.wiphy->cipher_suites);
1434
1435 idr_for_each(&local->ack_status_frames,
1436 ieee80211_free_ack_frame, NULL);
1437 idr_destroy(&local->ack_status_frames);
1438
1439 sta_info_stop(local);
1440
1441 ieee80211_free_led_names(local);
1442
1443 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1444 if (!(local->sband_allocated & BIT(band)))
1445 continue;
1446 kfree(local->hw.wiphy->bands[band]);
1447 }
1448
1449 wiphy_free(local->hw.wiphy);
1450 }
1451 EXPORT_SYMBOL(ieee80211_free_hw);
1452
ieee80211_init(void)1453 static int __init ieee80211_init(void)
1454 {
1455 struct sk_buff *skb;
1456 int ret;
1457
1458 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1459 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1460 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1461
1462 ret = rc80211_minstrel_init();
1463 if (ret)
1464 return ret;
1465
1466 ret = ieee80211_iface_init();
1467 if (ret)
1468 goto err_netdev;
1469
1470 return 0;
1471 err_netdev:
1472 rc80211_minstrel_exit();
1473
1474 return ret;
1475 }
1476
ieee80211_exit(void)1477 static void __exit ieee80211_exit(void)
1478 {
1479 rc80211_minstrel_exit();
1480
1481 ieee80211s_stop();
1482
1483 ieee80211_iface_exit();
1484
1485 rcu_barrier();
1486 }
1487
1488
1489 subsys_initcall(ieee80211_init);
1490 module_exit(ieee80211_exit);
1491
1492 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1493 MODULE_LICENSE("GPL");
1494
