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) 2018-2023 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/dropreason.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "debugfs.h"
36
ieee80211_configure_filter(struct ieee80211_local * local)37 void ieee80211_configure_filter(struct ieee80211_local *local)
38 {
39 u64 mc;
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
42
43 if (atomic_read(&local->iff_allmultis))
44 new_flags |= FIF_ALLMULTI;
45
46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
48 new_flags |= FIF_BCN_PRBRESP_PROMISC;
49
50 if (local->fif_probe_req || local->probe_req_reg)
51 new_flags |= FIF_PROBE_REQ;
52
53 if (local->fif_fcsfail)
54 new_flags |= FIF_FCSFAIL;
55
56 if (local->fif_plcpfail)
57 new_flags |= FIF_PLCPFAIL;
58
59 if (local->fif_control)
60 new_flags |= FIF_CONTROL;
61
62 if (local->fif_other_bss)
63 new_flags |= FIF_OTHER_BSS;
64
65 if (local->fif_pspoll)
66 new_flags |= FIF_PSPOLL;
67
68 if (local->rx_mcast_action_reg)
69 new_flags |= FIF_MCAST_ACTION;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
ieee80211_reconfig_filter(struct work_struct * work)87 static void ieee80211_reconfig_filter(struct work_struct *work)
88 {
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
91
92 ieee80211_configure_filter(local);
93 }
94
ieee80211_hw_conf_chan(struct ieee80211_local * local)95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
96 {
97 struct ieee80211_sub_if_data *sdata;
98 struct cfg80211_chan_def chandef = {};
99 u32 changed = 0;
100 int power;
101 u32 offchannel_flag;
102
103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
104
105 if (local->scan_chandef.chan) {
106 chandef = local->scan_chandef;
107 } else if (local->tmp_channel) {
108 chandef.chan = local->tmp_channel;
109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
110 chandef.center_freq1 = chandef.chan->center_freq;
111 chandef.freq1_offset = chandef.chan->freq_offset;
112 } else
113 chandef = local->_oper_chandef;
114
115 WARN(!cfg80211_chandef_valid(&chandef),
116 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
117 chandef.chan->center_freq, chandef.chan->freq_offset,
118 chandef.width, chandef.center_freq1, chandef.freq1_offset,
119 chandef.center_freq2);
120
121 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
122 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
123 else
124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
125
126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
127
128 if (offchannel_flag ||
129 !cfg80211_chandef_identical(&local->hw.conf.chandef,
130 &local->_oper_chandef)) {
131 local->hw.conf.chandef = chandef;
132 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
133 }
134
135 if (!conf_is_ht(&local->hw.conf)) {
136 /*
137 * mac80211.h documents that this is only valid
138 * when the channel is set to an HT type, and
139 * that otherwise STATIC is used.
140 */
141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
142 } else if (local->hw.conf.smps_mode != local->smps_mode) {
143 local->hw.conf.smps_mode = local->smps_mode;
144 changed |= IEEE80211_CONF_CHANGE_SMPS;
145 }
146
147 power = ieee80211_chandef_max_power(&chandef);
148
149 rcu_read_lock();
150 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
151 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
152 continue;
153 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
154 continue;
155 if (sdata->vif.bss_conf.txpower == INT_MIN)
156 continue;
157 power = min(power, sdata->vif.bss_conf.txpower);
158 }
159 rcu_read_unlock();
160
161 if (local->hw.conf.power_level != power) {
162 changed |= IEEE80211_CONF_CHANGE_POWER;
163 local->hw.conf.power_level = power;
164 }
165
166 return changed;
167 }
168
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)169 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
170 {
171 int ret = 0;
172
173 might_sleep();
174
175 if (!local->use_chanctx)
176 changed |= ieee80211_hw_conf_chan(local);
177 else
178 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
179 IEEE80211_CONF_CHANGE_POWER |
180 IEEE80211_CONF_CHANGE_SMPS);
181
182 if (changed && local->open_count) {
183 ret = drv_config(local, changed);
184 /*
185 * Goal:
186 * HW reconfiguration should never fail, the driver has told
187 * us what it can support so it should live up to that promise.
188 *
189 * Current status:
190 * rfkill is not integrated with mac80211 and a
191 * configuration command can thus fail if hardware rfkill
192 * is enabled
193 *
194 * FIXME: integrate rfkill with mac80211 and then add this
195 * WARN_ON() back
196 *
197 */
198 /* WARN_ON(ret); */
199 }
200
201 return ret;
202 }
203
204 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
205 BSS_CHANGED_IDLE |\
206 BSS_CHANGED_PS |\
207 BSS_CHANGED_IBSS |\
208 BSS_CHANGED_ARP_FILTER |\
209 BSS_CHANGED_SSID)
210
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)211 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
212 u64 changed)
213 {
214 struct ieee80211_local *local = sdata->local;
215
216 might_sleep();
217
218 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
219 return;
220
221 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
222 BSS_CHANGED_BEACON_ENABLED) &&
223 sdata->vif.type != NL80211_IFTYPE_AP &&
224 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
225 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
226 sdata->vif.type != NL80211_IFTYPE_OCB))
227 return;
228
229 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
230 sdata->vif.type == NL80211_IFTYPE_NAN ||
231 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
232 !sdata->vif.bss_conf.mu_mimo_owner &&
233 !(changed & BSS_CHANGED_TXPOWER))))
234 return;
235
236 if (!check_sdata_in_driver(sdata))
237 return;
238
239 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
240 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
241
242 trace_drv_vif_cfg_changed(local, sdata, changed);
243 if (local->ops->vif_cfg_changed)
244 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
245 }
246
247 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
248 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
249
250 /* FIXME: should be for each link */
251 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
252 changed);
253 if (local->ops->link_info_changed)
254 local->ops->link_info_changed(&local->hw, &sdata->vif,
255 &sdata->vif.bss_conf, ch);
256 }
257
258 if (local->ops->bss_info_changed)
259 local->ops->bss_info_changed(&local->hw, &sdata->vif,
260 &sdata->vif.bss_conf, changed);
261 trace_drv_return_void(local);
262 }
263
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)264 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
265 u64 changed)
266 {
267 struct ieee80211_local *local = sdata->local;
268
269 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
270
271 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
272 return;
273
274 drv_vif_cfg_changed(local, sdata, changed);
275 }
276
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)277 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
278 struct ieee80211_link_data *link,
279 u64 changed)
280 {
281 struct ieee80211_local *local = sdata->local;
282
283 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
284
285 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
286 return;
287
288 if (!check_sdata_in_driver(sdata))
289 return;
290
291 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
292 }
293
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)294 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
295 {
296 sdata->vif.bss_conf.use_cts_prot = false;
297 sdata->vif.bss_conf.use_short_preamble = false;
298 sdata->vif.bss_conf.use_short_slot = false;
299 return BSS_CHANGED_ERP_CTS_PROT |
300 BSS_CHANGED_ERP_PREAMBLE |
301 BSS_CHANGED_ERP_SLOT;
302 }
303
304 /* context: requires softirqs disabled */
ieee80211_handle_queued_frames(struct ieee80211_local * local)305 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
306 {
307 struct sk_buff *skb;
308
309 while ((skb = skb_dequeue(&local->skb_queue)) ||
310 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
311 switch (skb->pkt_type) {
312 case IEEE80211_RX_MSG:
313 /* Clear skb->pkt_type in order to not confuse kernel
314 * netstack. */
315 skb->pkt_type = 0;
316 ieee80211_rx(&local->hw, skb);
317 break;
318 case IEEE80211_TX_STATUS_MSG:
319 skb->pkt_type = 0;
320 ieee80211_tx_status(&local->hw, skb);
321 break;
322 default:
323 WARN(1, "mac80211: Packet is of unknown type %d\n",
324 skb->pkt_type);
325 dev_kfree_skb(skb);
326 break;
327 }
328 }
329 }
330
ieee80211_tasklet_handler(struct tasklet_struct * t)331 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
332 {
333 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
334
335 ieee80211_handle_queued_frames(local);
336 }
337
ieee80211_restart_work(struct work_struct * work)338 static void ieee80211_restart_work(struct work_struct *work)
339 {
340 struct ieee80211_local *local =
341 container_of(work, struct ieee80211_local, restart_work);
342 struct ieee80211_sub_if_data *sdata;
343 int ret;
344
345 flush_workqueue(local->workqueue);
346
347 rtnl_lock();
348 /* we might do interface manipulations, so need both */
349 wiphy_lock(local->hw.wiphy);
350
351 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
352 "%s called with hardware scan in progress\n", __func__);
353
354 list_for_each_entry(sdata, &local->interfaces, list) {
355 /*
356 * XXX: there may be more work for other vif types and even
357 * for station mode: a good thing would be to run most of
358 * the iface type's dependent _stop (ieee80211_mg_stop,
359 * ieee80211_ibss_stop) etc...
360 * For now, fix only the specific bug that was seen: race
361 * between csa_connection_drop_work and us.
362 */
363 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
364 /*
365 * This worker is scheduled from the iface worker that
366 * runs on mac80211's workqueue, so we can't be
367 * scheduling this worker after the cancel right here.
368 * The exception is ieee80211_chswitch_done.
369 * Then we can have a race...
370 */
371 wiphy_work_cancel(local->hw.wiphy,
372 &sdata->u.mgd.csa_connection_drop_work);
373 if (sdata->vif.bss_conf.csa_active) {
374 sdata_lock(sdata);
375 ieee80211_sta_connection_lost(sdata,
376 WLAN_REASON_UNSPECIFIED,
377 false);
378 sdata_unlock(sdata);
379 }
380 }
381 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
382 }
383 ieee80211_scan_cancel(local);
384
385 /* make sure any new ROC will consider local->in_reconfig */
386 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
387 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
388
389 /* wait for all packet processing to be done */
390 synchronize_net();
391
392 ret = ieee80211_reconfig(local);
393 wiphy_unlock(local->hw.wiphy);
394
395 if (ret)
396 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
397
398 rtnl_unlock();
399 }
400
ieee80211_restart_hw(struct ieee80211_hw * hw)401 void ieee80211_restart_hw(struct ieee80211_hw *hw)
402 {
403 struct ieee80211_local *local = hw_to_local(hw);
404
405 trace_api_restart_hw(local);
406
407 wiphy_info(hw->wiphy,
408 "Hardware restart was requested\n");
409
410 /* use this reason, ieee80211_reconfig will unblock it */
411 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
412 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
413 false);
414
415 /*
416 * Stop all Rx during the reconfig. We don't want state changes
417 * or driver callbacks while this is in progress.
418 */
419 local->in_reconfig = true;
420 barrier();
421
422 queue_work(system_freezable_wq, &local->restart_work);
423 }
424 EXPORT_SYMBOL(ieee80211_restart_hw);
425
426 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)427 static int ieee80211_ifa_changed(struct notifier_block *nb,
428 unsigned long data, void *arg)
429 {
430 struct in_ifaddr *ifa = arg;
431 struct ieee80211_local *local =
432 container_of(nb, struct ieee80211_local,
433 ifa_notifier);
434 struct net_device *ndev = ifa->ifa_dev->dev;
435 struct wireless_dev *wdev = ndev->ieee80211_ptr;
436 struct in_device *idev;
437 struct ieee80211_sub_if_data *sdata;
438 struct ieee80211_vif_cfg *vif_cfg;
439 struct ieee80211_if_managed *ifmgd;
440 int c = 0;
441
442 /* Make sure it's our interface that got changed */
443 if (!wdev)
444 return NOTIFY_DONE;
445
446 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
447 return NOTIFY_DONE;
448
449 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
450 vif_cfg = &sdata->vif.cfg;
451
452 /* ARP filtering is only supported in managed mode */
453 if (sdata->vif.type != NL80211_IFTYPE_STATION)
454 return NOTIFY_DONE;
455
456 idev = __in_dev_get_rtnl(sdata->dev);
457 if (!idev)
458 return NOTIFY_DONE;
459
460 ifmgd = &sdata->u.mgd;
461
462 /*
463 * The nested here is needed to convince lockdep that this is
464 * all OK. Yes, we lock the wiphy mutex here while we already
465 * hold the notifier rwsem, that's the normal case. And yes,
466 * we also acquire the notifier rwsem again when unregistering
467 * a netdev while we already hold the wiphy mutex, so it does
468 * look like a typical ABBA deadlock.
469 *
470 * However, both of these things happen with the RTNL held
471 * already. Therefore, they can't actually happen, since the
472 * lock orders really are ABC and ACB, which is fine due to
473 * the RTNL (A).
474 *
475 * We still need to prevent recursion, which is accomplished
476 * by the !wdev->registered check above.
477 */
478 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
479 __acquire(&local->hw.wiphy->mtx);
480 sdata_lock(sdata);
481
482 /* Copy the addresses to the vif config list */
483 ifa = rtnl_dereference(idev->ifa_list);
484 while (ifa) {
485 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
486 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
487 ifa = rtnl_dereference(ifa->ifa_next);
488 c++;
489 }
490
491 vif_cfg->arp_addr_cnt = c;
492
493 /* Configure driver only if associated (which also implies it is up) */
494 if (ifmgd->associated)
495 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
496
497 sdata_unlock(sdata);
498 wiphy_unlock(local->hw.wiphy);
499
500 return NOTIFY_OK;
501 }
502 #endif
503
504 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)505 static int ieee80211_ifa6_changed(struct notifier_block *nb,
506 unsigned long data, void *arg)
507 {
508 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
509 struct inet6_dev *idev = ifa->idev;
510 struct net_device *ndev = ifa->idev->dev;
511 struct ieee80211_local *local =
512 container_of(nb, struct ieee80211_local, ifa6_notifier);
513 struct wireless_dev *wdev = ndev->ieee80211_ptr;
514 struct ieee80211_sub_if_data *sdata;
515
516 /* Make sure it's our interface that got changed */
517 if (!wdev || wdev->wiphy != local->hw.wiphy)
518 return NOTIFY_DONE;
519
520 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
521
522 /*
523 * For now only support station mode. This is mostly because
524 * doing AP would have to handle AP_VLAN in some way ...
525 */
526 if (sdata->vif.type != NL80211_IFTYPE_STATION)
527 return NOTIFY_DONE;
528
529 drv_ipv6_addr_change(local, sdata, idev);
530
531 return NOTIFY_OK;
532 }
533 #endif
534
535 /* There isn't a lot of sense in it, but you can transmit anything you like */
536 static const struct ieee80211_txrx_stypes
537 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
538 [NL80211_IFTYPE_ADHOC] = {
539 .tx = 0xffff,
540 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
541 BIT(IEEE80211_STYPE_AUTH >> 4) |
542 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
543 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
544 },
545 [NL80211_IFTYPE_STATION] = {
546 .tx = 0xffff,
547 /*
548 * To support Pre Association Security Negotiation (PASN) while
549 * already associated to one AP, allow user space to register to
550 * Rx authentication frames, so that the user space logic would
551 * be able to receive/handle authentication frames from a
552 * different AP as part of PASN.
553 * It is expected that user space would intelligently register
554 * for Rx authentication frames, i.e., only when PASN is used
555 * and configure a match filter only for PASN authentication
556 * algorithm, as otherwise the MLME functionality of mac80211
557 * would be broken.
558 */
559 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
560 BIT(IEEE80211_STYPE_AUTH >> 4) |
561 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
562 },
563 [NL80211_IFTYPE_AP] = {
564 .tx = 0xffff,
565 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
566 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
567 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
568 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
569 BIT(IEEE80211_STYPE_AUTH >> 4) |
570 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
571 BIT(IEEE80211_STYPE_ACTION >> 4),
572 },
573 [NL80211_IFTYPE_AP_VLAN] = {
574 /* copy AP */
575 .tx = 0xffff,
576 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
577 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
578 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
579 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
580 BIT(IEEE80211_STYPE_AUTH >> 4) |
581 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
582 BIT(IEEE80211_STYPE_ACTION >> 4),
583 },
584 [NL80211_IFTYPE_P2P_CLIENT] = {
585 .tx = 0xffff,
586 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
587 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
588 },
589 [NL80211_IFTYPE_P2P_GO] = {
590 .tx = 0xffff,
591 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
592 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
593 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
594 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
595 BIT(IEEE80211_STYPE_AUTH >> 4) |
596 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
597 BIT(IEEE80211_STYPE_ACTION >> 4),
598 },
599 [NL80211_IFTYPE_MESH_POINT] = {
600 .tx = 0xffff,
601 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
602 BIT(IEEE80211_STYPE_AUTH >> 4) |
603 BIT(IEEE80211_STYPE_DEAUTH >> 4),
604 },
605 [NL80211_IFTYPE_P2P_DEVICE] = {
606 .tx = 0xffff,
607 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
608 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
609 },
610 };
611
612 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
613 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
614 IEEE80211_HT_AMPDU_PARM_DENSITY,
615
616 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
617 IEEE80211_HT_CAP_MAX_AMSDU |
618 IEEE80211_HT_CAP_SGI_20 |
619 IEEE80211_HT_CAP_SGI_40 |
620 IEEE80211_HT_CAP_TX_STBC |
621 IEEE80211_HT_CAP_RX_STBC |
622 IEEE80211_HT_CAP_LDPC_CODING |
623 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
624 .mcs = {
625 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
626 0xff, 0xff, 0xff, 0xff, 0xff, },
627 },
628 };
629
630 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
631 .vht_cap_info =
632 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
633 IEEE80211_VHT_CAP_SHORT_GI_80 |
634 IEEE80211_VHT_CAP_SHORT_GI_160 |
635 IEEE80211_VHT_CAP_RXSTBC_MASK |
636 IEEE80211_VHT_CAP_TXSTBC |
637 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
638 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
639 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
640 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
641 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
642 .supp_mcs = {
643 .rx_mcs_map = cpu_to_le16(~0),
644 .tx_mcs_map = cpu_to_le16(~0),
645 },
646 };
647
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)648 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
649 const struct ieee80211_ops *ops,
650 const char *requested_name)
651 {
652 struct ieee80211_local *local;
653 int priv_size, i;
654 struct wiphy *wiphy;
655 bool use_chanctx;
656
657 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
658 !ops->add_interface || !ops->remove_interface ||
659 !ops->configure_filter || !ops->wake_tx_queue))
660 return NULL;
661
662 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
663 return NULL;
664
665 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
666 (ops->link_info_changed && ops->bss_info_changed)))
667 return NULL;
668
669 /* check all or no channel context operations exist */
670 i = !!ops->add_chanctx + !!ops->remove_chanctx +
671 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
672 !!ops->unassign_vif_chanctx;
673 if (WARN_ON(i != 0 && i != 5))
674 return NULL;
675 use_chanctx = i == 5;
676
677 /* Ensure 32-byte alignment of our private data and hw private data.
678 * We use the wiphy priv data for both our ieee80211_local and for
679 * the driver's private data
680 *
681 * In memory it'll be like this:
682 *
683 * +-------------------------+
684 * | struct wiphy |
685 * +-------------------------+
686 * | struct ieee80211_local |
687 * +-------------------------+
688 * | driver's private data |
689 * +-------------------------+
690 *
691 */
692 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
693
694 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
695
696 if (!wiphy)
697 return NULL;
698
699 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
700
701 wiphy->privid = mac80211_wiphy_privid;
702
703 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
704 WIPHY_FLAG_4ADDR_AP |
705 WIPHY_FLAG_4ADDR_STATION |
706 WIPHY_FLAG_REPORTS_OBSS |
707 WIPHY_FLAG_OFFCHAN_TX;
708
709 if (!use_chanctx || ops->remain_on_channel)
710 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
711
712 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
713 NL80211_FEATURE_SAE |
714 NL80211_FEATURE_HT_IBSS |
715 NL80211_FEATURE_VIF_TXPOWER |
716 NL80211_FEATURE_MAC_ON_CREATE |
717 NL80211_FEATURE_USERSPACE_MPM |
718 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
719 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
720 wiphy_ext_feature_set(wiphy,
721 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
722 wiphy_ext_feature_set(wiphy,
723 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
724 wiphy_ext_feature_set(wiphy,
725 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
726 wiphy_ext_feature_set(wiphy,
727 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
728 wiphy_ext_feature_set(wiphy,
729 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
730
731 if (!ops->hw_scan) {
732 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
733 NL80211_FEATURE_AP_SCAN;
734 /*
735 * if the driver behaves correctly using the probe request
736 * (template) from mac80211, then both of these should be
737 * supported even with hw scan - but let drivers opt in.
738 */
739 wiphy_ext_feature_set(wiphy,
740 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
741 wiphy_ext_feature_set(wiphy,
742 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
743 }
744
745 if (!ops->set_key)
746 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
747
748 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
749 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
750
751 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
752
753 local = wiphy_priv(wiphy);
754
755 if (sta_info_init(local))
756 goto err_free;
757
758 local->hw.wiphy = wiphy;
759
760 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
761
762 local->ops = ops;
763 local->use_chanctx = use_chanctx;
764
765 /*
766 * We need a bit of data queued to build aggregates properly, so
767 * instruct the TCP stack to allow more than a single ms of data
768 * to be queued in the stack. The value is a bit-shift of 1
769 * second, so 7 is ~8ms of queued data. Only affects local TCP
770 * sockets.
771 * This is the default, anyhow - drivers may need to override it
772 * for local reasons (longer buffers, longer completion time, or
773 * similar).
774 */
775 local->hw.tx_sk_pacing_shift = 7;
776
777 /* set up some defaults */
778 local->hw.queues = 1;
779 local->hw.max_rates = 1;
780 local->hw.max_report_rates = 0;
781 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
782 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
783 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
784 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
785 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
786 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
787 IEEE80211_RADIOTAP_MCS_HAVE_GI |
788 IEEE80211_RADIOTAP_MCS_HAVE_BW;
789 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
790 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
791 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
792 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
793 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
794 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
795 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
796 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
797
798 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
799
800 wiphy->extended_capabilities = local->ext_capa;
801 wiphy->extended_capabilities_mask = local->ext_capa;
802 wiphy->extended_capabilities_len =
803 ARRAY_SIZE(local->ext_capa);
804
805 INIT_LIST_HEAD(&local->interfaces);
806 INIT_LIST_HEAD(&local->mon_list);
807
808 __hw_addr_init(&local->mc_list);
809
810 mutex_init(&local->iflist_mtx);
811 mutex_init(&local->mtx);
812
813 mutex_init(&local->key_mtx);
814 spin_lock_init(&local->filter_lock);
815 spin_lock_init(&local->rx_path_lock);
816 spin_lock_init(&local->queue_stop_reason_lock);
817
818 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
819 INIT_LIST_HEAD(&local->active_txqs[i]);
820 spin_lock_init(&local->active_txq_lock[i]);
821 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
822 local->aql_txq_limit_high[i] =
823 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
824 atomic_set(&local->aql_ac_pending_airtime[i], 0);
825 }
826
827 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
828 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
829 atomic_set(&local->aql_total_pending_airtime, 0);
830
831 spin_lock_init(&local->handle_wake_tx_queue_lock);
832
833 INIT_LIST_HEAD(&local->chanctx_list);
834 mutex_init(&local->chanctx_mtx);
835
836 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
837
838 INIT_WORK(&local->restart_work, ieee80211_restart_work);
839
840 wiphy_work_init(&local->radar_detected_work,
841 ieee80211_dfs_radar_detected_work);
842
843 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
844 local->smps_mode = IEEE80211_SMPS_OFF;
845
846 INIT_WORK(&local->dynamic_ps_enable_work,
847 ieee80211_dynamic_ps_enable_work);
848 INIT_WORK(&local->dynamic_ps_disable_work,
849 ieee80211_dynamic_ps_disable_work);
850 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
851
852 wiphy_work_init(&local->sched_scan_stopped_work,
853 ieee80211_sched_scan_stopped_work);
854
855 spin_lock_init(&local->ack_status_lock);
856 idr_init(&local->ack_status_frames);
857
858 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
859 skb_queue_head_init(&local->pending[i]);
860 atomic_set(&local->agg_queue_stop[i], 0);
861 }
862 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
863 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
864 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
865
866 skb_queue_head_init(&local->skb_queue);
867 skb_queue_head_init(&local->skb_queue_unreliable);
868
869 ieee80211_alloc_led_names(local);
870
871 ieee80211_roc_setup(local);
872
873 local->hw.radiotap_timestamp.units_pos = -1;
874 local->hw.radiotap_timestamp.accuracy = -1;
875
876 return &local->hw;
877 err_free:
878 wiphy_free(wiphy);
879 return NULL;
880 }
881 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
882
ieee80211_init_cipher_suites(struct ieee80211_local * local)883 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
884 {
885 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
886 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
887 int r = 0, w = 0;
888 u32 *suites;
889 static const u32 cipher_suites[] = {
890 /* keep WEP first, it may be removed below */
891 WLAN_CIPHER_SUITE_WEP40,
892 WLAN_CIPHER_SUITE_WEP104,
893 WLAN_CIPHER_SUITE_TKIP,
894 WLAN_CIPHER_SUITE_CCMP,
895 WLAN_CIPHER_SUITE_CCMP_256,
896 WLAN_CIPHER_SUITE_GCMP,
897 WLAN_CIPHER_SUITE_GCMP_256,
898
899 /* keep last -- depends on hw flags! */
900 WLAN_CIPHER_SUITE_AES_CMAC,
901 WLAN_CIPHER_SUITE_BIP_CMAC_256,
902 WLAN_CIPHER_SUITE_BIP_GMAC_128,
903 WLAN_CIPHER_SUITE_BIP_GMAC_256,
904 };
905
906 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
907 local->hw.wiphy->cipher_suites) {
908 /* If the driver advertises, or doesn't support SW crypto,
909 * we only need to remove WEP if necessary.
910 */
911 if (have_wep)
912 return 0;
913
914 /* well if it has _no_ ciphers ... fine */
915 if (!local->hw.wiphy->n_cipher_suites)
916 return 0;
917
918 /* Driver provides cipher suites, but we need to exclude WEP */
919 suites = kmemdup(local->hw.wiphy->cipher_suites,
920 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
921 GFP_KERNEL);
922 if (!suites)
923 return -ENOMEM;
924
925 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
926 u32 suite = local->hw.wiphy->cipher_suites[r];
927
928 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
929 suite == WLAN_CIPHER_SUITE_WEP104)
930 continue;
931 suites[w++] = suite;
932 }
933 } else {
934 /* assign the (software supported and perhaps offloaded)
935 * cipher suites
936 */
937 local->hw.wiphy->cipher_suites = cipher_suites;
938 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
939
940 if (!have_mfp)
941 local->hw.wiphy->n_cipher_suites -= 4;
942
943 if (!have_wep) {
944 local->hw.wiphy->cipher_suites += 2;
945 local->hw.wiphy->n_cipher_suites -= 2;
946 }
947
948 /* not dynamically allocated, so just return */
949 return 0;
950 }
951
952 local->hw.wiphy->cipher_suites = suites;
953 local->hw.wiphy->n_cipher_suites = w;
954 local->wiphy_ciphers_allocated = true;
955
956 return 0;
957 }
958
ieee80211_register_hw(struct ieee80211_hw * hw)959 int ieee80211_register_hw(struct ieee80211_hw *hw)
960 {
961 struct ieee80211_local *local = hw_to_local(hw);
962 int result, i;
963 enum nl80211_band band;
964 int channels, max_bitrates;
965 bool supp_ht, supp_vht, supp_he, supp_eht;
966 struct cfg80211_chan_def dflt_chandef = {};
967
968 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
969 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
970 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
971 return -EINVAL;
972
973 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
974 (!local->ops->tdls_channel_switch ||
975 !local->ops->tdls_cancel_channel_switch ||
976 !local->ops->tdls_recv_channel_switch))
977 return -EOPNOTSUPP;
978
979 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
980 !local->ops->set_frag_threshold))
981 return -EINVAL;
982
983 if (WARN_ON(local->hw.wiphy->interface_modes &
984 BIT(NL80211_IFTYPE_NAN) &&
985 (!local->ops->start_nan || !local->ops->stop_nan)))
986 return -EINVAL;
987
988 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
989 /*
990 * For drivers capable of doing MLO, assume modern driver
991 * or firmware facilities, so software doesn't have to do
992 * as much, e.g. monitoring beacons would be hard if we
993 * might not even know which link is active at which time.
994 */
995 if (WARN_ON(!local->use_chanctx))
996 return -EINVAL;
997
998 if (WARN_ON(!local->ops->link_info_changed))
999 return -EINVAL;
1000
1001 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1002 return -EINVAL;
1003
1004 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1005 return -EINVAL;
1006
1007 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1008 return -EINVAL;
1009
1010 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1011 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1012 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1013 return -EINVAL;
1014
1015 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1016 return -EINVAL;
1017
1018 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1019 return -EINVAL;
1020
1021 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1022 return -EINVAL;
1023
1024 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1025 return -EINVAL;
1026
1027 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1028 return -EINVAL;
1029
1030 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1031 return -EINVAL;
1032 }
1033
1034 #ifdef CONFIG_PM
1035 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1036 return -EINVAL;
1037 #endif
1038
1039 if (!local->use_chanctx) {
1040 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1041 const struct ieee80211_iface_combination *comb;
1042
1043 comb = &local->hw.wiphy->iface_combinations[i];
1044
1045 if (comb->num_different_channels > 1)
1046 return -EINVAL;
1047 }
1048 } else {
1049 /* DFS is not supported with multi-channel combinations yet */
1050 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1051 const struct ieee80211_iface_combination *comb;
1052
1053 comb = &local->hw.wiphy->iface_combinations[i];
1054
1055 if (comb->radar_detect_widths &&
1056 comb->num_different_channels > 1)
1057 return -EINVAL;
1058 }
1059 }
1060
1061 /* Only HW csum features are currently compatible with mac80211 */
1062 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1063 return -EINVAL;
1064
1065 if (hw->max_report_rates == 0)
1066 hw->max_report_rates = hw->max_rates;
1067
1068 local->rx_chains = 1;
1069
1070 /*
1071 * generic code guarantees at least one band,
1072 * set this very early because much code assumes
1073 * that hw.conf.channel is assigned
1074 */
1075 channels = 0;
1076 max_bitrates = 0;
1077 supp_ht = false;
1078 supp_vht = false;
1079 supp_he = false;
1080 supp_eht = false;
1081 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1082 struct ieee80211_supported_band *sband;
1083
1084 sband = local->hw.wiphy->bands[band];
1085 if (!sband)
1086 continue;
1087
1088 if (!dflt_chandef.chan) {
1089 /*
1090 * Assign the first enabled channel to dflt_chandef
1091 * from the list of channels
1092 */
1093 for (i = 0; i < sband->n_channels; i++)
1094 if (!(sband->channels[i].flags &
1095 IEEE80211_CHAN_DISABLED))
1096 break;
1097 /* if none found then use the first anyway */
1098 if (i == sband->n_channels)
1099 i = 0;
1100 cfg80211_chandef_create(&dflt_chandef,
1101 &sband->channels[i],
1102 NL80211_CHAN_NO_HT);
1103 /* init channel we're on */
1104 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1105 local->hw.conf.chandef = dflt_chandef;
1106 local->_oper_chandef = dflt_chandef;
1107 }
1108 local->monitor_chandef = dflt_chandef;
1109 }
1110
1111 channels += sband->n_channels;
1112
1113 /*
1114 * Due to the way the aggregation code handles this and it
1115 * being an HT capability, we can't really support delayed
1116 * BA in MLO (yet).
1117 */
1118 if (WARN_ON(sband->ht_cap.ht_supported &&
1119 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1120 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1121 return -EINVAL;
1122
1123 if (max_bitrates < sband->n_bitrates)
1124 max_bitrates = sband->n_bitrates;
1125 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1126 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1127
1128 for (i = 0; i < sband->n_iftype_data; i++) {
1129 const struct ieee80211_sband_iftype_data *iftd;
1130
1131 iftd = &sband->iftype_data[i];
1132
1133 supp_he = supp_he || iftd->he_cap.has_he;
1134 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1135 }
1136
1137 /* HT, VHT, HE require QoS, thus >= 4 queues */
1138 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1139 (supp_ht || supp_vht || supp_he)))
1140 return -EINVAL;
1141
1142 /* EHT requires HE support */
1143 if (WARN_ON(supp_eht && !supp_he))
1144 return -EINVAL;
1145
1146 if (!sband->ht_cap.ht_supported)
1147 continue;
1148
1149 /* TODO: consider VHT for RX chains, hopefully it's the same */
1150 local->rx_chains =
1151 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1152 local->rx_chains);
1153
1154 /* no need to mask, SM_PS_DISABLED has all bits set */
1155 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1156 IEEE80211_HT_CAP_SM_PS_SHIFT;
1157 }
1158
1159 /* if low-level driver supports AP, we also support VLAN.
1160 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1161 * based on their support to transmit SW encrypted packets.
1162 */
1163 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1164 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1165 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1166 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1167 }
1168
1169 /* mac80211 always supports monitor */
1170 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1171 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1172
1173 /* mac80211 doesn't support more than one IBSS interface right now */
1174 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1175 const struct ieee80211_iface_combination *c;
1176 int j;
1177
1178 c = &hw->wiphy->iface_combinations[i];
1179
1180 for (j = 0; j < c->n_limits; j++)
1181 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1182 c->limits[j].max > 1)
1183 return -EINVAL;
1184 }
1185
1186 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1187 sizeof(void *) * channels, GFP_KERNEL);
1188 if (!local->int_scan_req)
1189 return -ENOMEM;
1190
1191 eth_broadcast_addr(local->int_scan_req->bssid);
1192
1193 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1194 if (!local->hw.wiphy->bands[band])
1195 continue;
1196 local->int_scan_req->rates[band] = (u32) -1;
1197 }
1198
1199 #ifndef CONFIG_MAC80211_MESH
1200 /* mesh depends on Kconfig, but drivers should set it if they want */
1201 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1202 #endif
1203
1204 /* if the underlying driver supports mesh, mac80211 will (at least)
1205 * provide routing of mesh authentication frames to userspace */
1206 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1207 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1208
1209 /* mac80211 supports control port protocol changing */
1210 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1211
1212 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1213 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1214 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1215 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1216 if (hw->max_signal <= 0) {
1217 result = -EINVAL;
1218 goto fail_workqueue;
1219 }
1220 }
1221
1222 /* Mac80211 and therefore all drivers using SW crypto only
1223 * are able to handle PTK rekeys and Extended Key ID.
1224 */
1225 if (!local->ops->set_key) {
1226 wiphy_ext_feature_set(local->hw.wiphy,
1227 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1228 wiphy_ext_feature_set(local->hw.wiphy,
1229 NL80211_EXT_FEATURE_EXT_KEY_ID);
1230 }
1231
1232 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1233 wiphy_ext_feature_set(local->hw.wiphy,
1234 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1235
1236 /*
1237 * Calculate scan IE length -- we need this to alloc
1238 * memory and to subtract from the driver limit. It
1239 * includes the DS Params, (extended) supported rates, and HT
1240 * information -- SSID is the driver's responsibility.
1241 */
1242 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1243 3 /* DS Params */;
1244 if (supp_ht)
1245 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1246
1247 if (supp_vht)
1248 local->scan_ies_len +=
1249 2 + sizeof(struct ieee80211_vht_cap);
1250
1251 /*
1252 * HE cap element is variable in size - set len to allow max size */
1253 if (supp_he) {
1254 local->scan_ies_len +=
1255 3 + sizeof(struct ieee80211_he_cap_elem) +
1256 sizeof(struct ieee80211_he_mcs_nss_supp) +
1257 IEEE80211_HE_PPE_THRES_MAX_LEN;
1258
1259 if (supp_eht)
1260 local->scan_ies_len +=
1261 3 + sizeof(struct ieee80211_eht_cap_elem) +
1262 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1263 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1264 }
1265
1266 if (!local->ops->hw_scan) {
1267 /* For hw_scan, driver needs to set these up. */
1268 local->hw.wiphy->max_scan_ssids = 4;
1269 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1270 }
1271
1272 /*
1273 * If the driver supports any scan IEs, then assume the
1274 * limit includes the IEs mac80211 will add, otherwise
1275 * leave it at zero and let the driver sort it out; we
1276 * still pass our IEs to the driver but userspace will
1277 * not be allowed to in that case.
1278 */
1279 if (local->hw.wiphy->max_scan_ie_len)
1280 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1281
1282 result = ieee80211_init_cipher_suites(local);
1283 if (result < 0)
1284 goto fail_workqueue;
1285
1286 if (!local->ops->remain_on_channel)
1287 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1288
1289 /* mac80211 based drivers don't support internal TDLS setup */
1290 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1291 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1292
1293 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1294 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1295 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1296
1297 /* mac80211 supports multi BSSID, if the driver supports it */
1298 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1299 local->hw.wiphy->support_mbssid = true;
1300 if (ieee80211_hw_check(&local->hw,
1301 SUPPORTS_ONLY_HE_MULTI_BSSID))
1302 local->hw.wiphy->support_only_he_mbssid = true;
1303 else
1304 local->ext_capa[2] |=
1305 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1306 }
1307
1308 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1309
1310 /*
1311 * We use the number of queues for feature tests (QoS, HT) internally
1312 * so restrict them appropriately.
1313 */
1314 if (hw->queues > IEEE80211_MAX_QUEUES)
1315 hw->queues = IEEE80211_MAX_QUEUES;
1316
1317 local->workqueue =
1318 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1319 if (!local->workqueue) {
1320 result = -ENOMEM;
1321 goto fail_workqueue;
1322 }
1323
1324 /*
1325 * The hardware needs headroom for sending the frame,
1326 * and we need some headroom for passing the frame to monitor
1327 * interfaces, but never both at the same time.
1328 */
1329 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1330 IEEE80211_TX_STATUS_HEADROOM);
1331
1332 /*
1333 * if the driver doesn't specify a max listen interval we
1334 * use 5 which should be a safe default
1335 */
1336 if (local->hw.max_listen_interval == 0)
1337 local->hw.max_listen_interval = 5;
1338
1339 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1340
1341 local->dynamic_ps_forced_timeout = -1;
1342
1343 if (!local->hw.max_nan_de_entries)
1344 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1345
1346 if (!local->hw.weight_multiplier)
1347 local->hw.weight_multiplier = 1;
1348
1349 ieee80211_wep_init(local);
1350
1351 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1352
1353 ieee80211_led_init(local);
1354
1355 result = ieee80211_txq_setup_flows(local);
1356 if (result)
1357 goto fail_flows;
1358
1359 rtnl_lock();
1360 result = ieee80211_init_rate_ctrl_alg(local,
1361 hw->rate_control_algorithm);
1362 rtnl_unlock();
1363 if (result < 0) {
1364 wiphy_debug(local->hw.wiphy,
1365 "Failed to initialize rate control algorithm\n");
1366 goto fail_rate;
1367 }
1368
1369 if (local->rate_ctrl) {
1370 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1371 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1372 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1373 }
1374
1375 /*
1376 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1377 * or have it when we don't, copy the sband structure and set/clear it.
1378 * This is necessary because rate scaling algorithms could be switched
1379 * and have different support values.
1380 * Print a message so that in the common case the reallocation can be
1381 * avoided.
1382 */
1383 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1384 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1385 struct ieee80211_supported_band *sband;
1386 bool local_cap, ie_cap;
1387
1388 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1389
1390 sband = local->hw.wiphy->bands[band];
1391 if (!sband || !sband->vht_cap.vht_supported)
1392 continue;
1393
1394 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1395 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1396
1397 if (local_cap == ie_cap)
1398 continue;
1399
1400 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1401 if (!sband) {
1402 result = -ENOMEM;
1403 goto fail_rate;
1404 }
1405
1406 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1407 band);
1408
1409 sband->vht_cap.vht_mcs.tx_highest ^=
1410 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1411
1412 local->hw.wiphy->bands[band] = sband;
1413 local->sband_allocated |= BIT(band);
1414 }
1415
1416 result = wiphy_register(local->hw.wiphy);
1417 if (result < 0)
1418 goto fail_wiphy_register;
1419
1420 debugfs_hw_add(local);
1421 rate_control_add_debugfs(local);
1422
1423 rtnl_lock();
1424 wiphy_lock(hw->wiphy);
1425
1426 /* add one default STA interface if supported */
1427 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1428 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1429 struct vif_params params = {0};
1430
1431 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1432 NL80211_IFTYPE_STATION, ¶ms);
1433 if (result)
1434 wiphy_warn(local->hw.wiphy,
1435 "Failed to add default virtual iface\n");
1436 }
1437
1438 wiphy_unlock(hw->wiphy);
1439 rtnl_unlock();
1440
1441 #ifdef CONFIG_INET
1442 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1443 result = register_inetaddr_notifier(&local->ifa_notifier);
1444 if (result)
1445 goto fail_ifa;
1446 #endif
1447
1448 #if IS_ENABLED(CONFIG_IPV6)
1449 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1450 result = register_inet6addr_notifier(&local->ifa6_notifier);
1451 if (result)
1452 goto fail_ifa6;
1453 #endif
1454
1455 return 0;
1456
1457 #if IS_ENABLED(CONFIG_IPV6)
1458 fail_ifa6:
1459 #ifdef CONFIG_INET
1460 unregister_inetaddr_notifier(&local->ifa_notifier);
1461 #endif
1462 #endif
1463 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1464 fail_ifa:
1465 #endif
1466 wiphy_unregister(local->hw.wiphy);
1467 fail_wiphy_register:
1468 rtnl_lock();
1469 rate_control_deinitialize(local);
1470 ieee80211_remove_interfaces(local);
1471 rtnl_unlock();
1472 fail_rate:
1473 fail_flows:
1474 ieee80211_led_exit(local);
1475 destroy_workqueue(local->workqueue);
1476 fail_workqueue:
1477 if (local->wiphy_ciphers_allocated) {
1478 kfree(local->hw.wiphy->cipher_suites);
1479 local->wiphy_ciphers_allocated = false;
1480 }
1481 kfree(local->int_scan_req);
1482 return result;
1483 }
1484 EXPORT_SYMBOL(ieee80211_register_hw);
1485
ieee80211_unregister_hw(struct ieee80211_hw * hw)1486 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1487 {
1488 struct ieee80211_local *local = hw_to_local(hw);
1489
1490 tasklet_kill(&local->tx_pending_tasklet);
1491 tasklet_kill(&local->tasklet);
1492
1493 #ifdef CONFIG_INET
1494 unregister_inetaddr_notifier(&local->ifa_notifier);
1495 #endif
1496 #if IS_ENABLED(CONFIG_IPV6)
1497 unregister_inet6addr_notifier(&local->ifa6_notifier);
1498 #endif
1499
1500 rtnl_lock();
1501
1502 /*
1503 * At this point, interface list manipulations are fine
1504 * because the driver cannot be handing us frames any
1505 * more and the tasklet is killed.
1506 */
1507 ieee80211_remove_interfaces(local);
1508
1509 wiphy_lock(local->hw.wiphy);
1510 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1511 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1512 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1513 wiphy_unlock(local->hw.wiphy);
1514 rtnl_unlock();
1515
1516 cancel_work_sync(&local->restart_work);
1517 cancel_work_sync(&local->reconfig_filter);
1518
1519 ieee80211_clear_tx_pending(local);
1520 rate_control_deinitialize(local);
1521
1522 if (skb_queue_len(&local->skb_queue) ||
1523 skb_queue_len(&local->skb_queue_unreliable))
1524 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1525 skb_queue_purge(&local->skb_queue);
1526 skb_queue_purge(&local->skb_queue_unreliable);
1527
1528 wiphy_unregister(local->hw.wiphy);
1529 destroy_workqueue(local->workqueue);
1530 ieee80211_led_exit(local);
1531 kfree(local->int_scan_req);
1532 }
1533 EXPORT_SYMBOL(ieee80211_unregister_hw);
1534
ieee80211_free_ack_frame(int id,void * p,void * data)1535 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1536 {
1537 WARN_ONCE(1, "Have pending ack frames!\n");
1538 kfree_skb(p);
1539 return 0;
1540 }
1541
ieee80211_free_hw(struct ieee80211_hw * hw)1542 void ieee80211_free_hw(struct ieee80211_hw *hw)
1543 {
1544 struct ieee80211_local *local = hw_to_local(hw);
1545 enum nl80211_band band;
1546
1547 mutex_destroy(&local->iflist_mtx);
1548 mutex_destroy(&local->mtx);
1549
1550 if (local->wiphy_ciphers_allocated) {
1551 kfree(local->hw.wiphy->cipher_suites);
1552 local->wiphy_ciphers_allocated = false;
1553 }
1554
1555 idr_for_each(&local->ack_status_frames,
1556 ieee80211_free_ack_frame, NULL);
1557 idr_destroy(&local->ack_status_frames);
1558
1559 sta_info_stop(local);
1560
1561 ieee80211_free_led_names(local);
1562
1563 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1564 if (!(local->sband_allocated & BIT(band)))
1565 continue;
1566 kfree(local->hw.wiphy->bands[band]);
1567 }
1568
1569 wiphy_free(local->hw.wiphy);
1570 }
1571 EXPORT_SYMBOL(ieee80211_free_hw);
1572
1573 static const char * const drop_reasons_monitor[] = {
1574 #define V(x) #x,
1575 [0] = "RX_DROP_MONITOR",
1576 MAC80211_DROP_REASONS_MONITOR(V)
1577 };
1578
1579 static struct drop_reason_list drop_reason_list_monitor = {
1580 .reasons = drop_reasons_monitor,
1581 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1582 };
1583
1584 static const char * const drop_reasons_unusable[] = {
1585 [0] = "RX_DROP_UNUSABLE",
1586 MAC80211_DROP_REASONS_UNUSABLE(V)
1587 #undef V
1588 };
1589
1590 static struct drop_reason_list drop_reason_list_unusable = {
1591 .reasons = drop_reasons_unusable,
1592 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1593 };
1594
ieee80211_init(void)1595 static int __init ieee80211_init(void)
1596 {
1597 struct sk_buff *skb;
1598 int ret;
1599
1600 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1601 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1602 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1603
1604 ret = rc80211_minstrel_init();
1605 if (ret)
1606 return ret;
1607
1608 ret = ieee80211_iface_init();
1609 if (ret)
1610 goto err_netdev;
1611
1612 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1613 &drop_reason_list_monitor);
1614 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1615 &drop_reason_list_unusable);
1616
1617 return 0;
1618 err_netdev:
1619 rc80211_minstrel_exit();
1620
1621 return ret;
1622 }
1623
ieee80211_exit(void)1624 static void __exit ieee80211_exit(void)
1625 {
1626 rc80211_minstrel_exit();
1627
1628 ieee80211s_stop();
1629
1630 ieee80211_iface_exit();
1631
1632 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1633 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1634
1635 rcu_barrier();
1636 }
1637
1638
1639 subsys_initcall(ieee80211_init);
1640 module_exit(ieee80211_exit);
1641
1642 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1643 MODULE_LICENSE("GPL");
1644