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 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif));
219
220 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
221 return;
222
223 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
224 BSS_CHANGED_BEACON_ENABLED) &&
225 sdata->vif.type != NL80211_IFTYPE_AP &&
226 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
227 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
228 sdata->vif.type != NL80211_IFTYPE_OCB))
229 return;
230
231 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
232 sdata->vif.type == NL80211_IFTYPE_NAN ||
233 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
234 !sdata->vif.bss_conf.mu_mimo_owner &&
235 !(changed & BSS_CHANGED_TXPOWER))))
236 return;
237
238 if (!check_sdata_in_driver(sdata))
239 return;
240
241 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
242 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
243
244 trace_drv_vif_cfg_changed(local, sdata, changed);
245 if (local->ops->vif_cfg_changed)
246 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
247 }
248
249 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
250 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
251
252 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
253 changed);
254 if (local->ops->link_info_changed)
255 local->ops->link_info_changed(&local->hw, &sdata->vif,
256 &sdata->vif.bss_conf, ch);
257 }
258
259 if (local->ops->bss_info_changed)
260 local->ops->bss_info_changed(&local->hw, &sdata->vif,
261 &sdata->vif.bss_conf, changed);
262 trace_drv_return_void(local);
263 }
264
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)265 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
266 u64 changed)
267 {
268 struct ieee80211_local *local = sdata->local;
269
270 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
271
272 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
273 return;
274
275 drv_vif_cfg_changed(local, sdata, changed);
276 }
277
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)278 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
279 struct ieee80211_link_data *link,
280 u64 changed)
281 {
282 struct ieee80211_local *local = sdata->local;
283
284 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
285
286 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
287 return;
288
289 if (!check_sdata_in_driver(sdata))
290 return;
291
292 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
293 }
294
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)295 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
296 {
297 sdata->vif.bss_conf.use_cts_prot = false;
298 sdata->vif.bss_conf.use_short_preamble = false;
299 sdata->vif.bss_conf.use_short_slot = false;
300 return BSS_CHANGED_ERP_CTS_PROT |
301 BSS_CHANGED_ERP_PREAMBLE |
302 BSS_CHANGED_ERP_SLOT;
303 }
304
305 /* context: requires softirqs disabled */
ieee80211_handle_queued_frames(struct ieee80211_local * local)306 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
307 {
308 struct sk_buff *skb;
309
310 while ((skb = skb_dequeue(&local->skb_queue)) ||
311 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
312 switch (skb->pkt_type) {
313 case IEEE80211_RX_MSG:
314 /* Clear skb->pkt_type in order to not confuse kernel
315 * netstack. */
316 skb->pkt_type = 0;
317 ieee80211_rx(&local->hw, skb);
318 break;
319 case IEEE80211_TX_STATUS_MSG:
320 skb->pkt_type = 0;
321 ieee80211_tx_status(&local->hw, skb);
322 break;
323 default:
324 WARN(1, "mac80211: Packet is of unknown type %d\n",
325 skb->pkt_type);
326 dev_kfree_skb(skb);
327 break;
328 }
329 }
330 }
331
ieee80211_tasklet_handler(struct tasklet_struct * t)332 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
333 {
334 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
335
336 ieee80211_handle_queued_frames(local);
337 }
338
ieee80211_restart_work(struct work_struct * work)339 static void ieee80211_restart_work(struct work_struct *work)
340 {
341 struct ieee80211_local *local =
342 container_of(work, struct ieee80211_local, restart_work);
343 struct ieee80211_sub_if_data *sdata;
344 int ret;
345
346 flush_workqueue(local->workqueue);
347
348 rtnl_lock();
349 /* we might do interface manipulations, so need both */
350 wiphy_lock(local->hw.wiphy);
351
352 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
353 "%s called with hardware scan in progress\n", __func__);
354
355 list_for_each_entry(sdata, &local->interfaces, list) {
356 /*
357 * XXX: there may be more work for other vif types and even
358 * for station mode: a good thing would be to run most of
359 * the iface type's dependent _stop (ieee80211_mg_stop,
360 * ieee80211_ibss_stop) etc...
361 * For now, fix only the specific bug that was seen: race
362 * between csa_connection_drop_work and us.
363 */
364 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
365 /*
366 * This worker is scheduled from the iface worker that
367 * runs on mac80211's workqueue, so we can't be
368 * scheduling this worker after the cancel right here.
369 * The exception is ieee80211_chswitch_done.
370 * Then we can have a race...
371 */
372 wiphy_work_cancel(local->hw.wiphy,
373 &sdata->u.mgd.csa_connection_drop_work);
374 if (sdata->vif.bss_conf.csa_active) {
375 sdata_lock(sdata);
376 ieee80211_sta_connection_lost(sdata,
377 WLAN_REASON_UNSPECIFIED,
378 false);
379 sdata_unlock(sdata);
380 }
381 }
382 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
383 }
384 ieee80211_scan_cancel(local);
385
386 /* make sure any new ROC will consider local->in_reconfig */
387 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
388 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
389
390 /* wait for all packet processing to be done */
391 synchronize_net();
392
393 ret = ieee80211_reconfig(local);
394 wiphy_unlock(local->hw.wiphy);
395
396 if (ret)
397 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
398
399 rtnl_unlock();
400 }
401
ieee80211_restart_hw(struct ieee80211_hw * hw)402 void ieee80211_restart_hw(struct ieee80211_hw *hw)
403 {
404 struct ieee80211_local *local = hw_to_local(hw);
405
406 trace_api_restart_hw(local);
407
408 wiphy_info(hw->wiphy,
409 "Hardware restart was requested\n");
410
411 /* use this reason, ieee80211_reconfig will unblock it */
412 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
413 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
414 false);
415
416 /*
417 * Stop all Rx during the reconfig. We don't want state changes
418 * or driver callbacks while this is in progress.
419 */
420 local->in_reconfig = true;
421 barrier();
422
423 queue_work(system_freezable_wq, &local->restart_work);
424 }
425 EXPORT_SYMBOL(ieee80211_restart_hw);
426
427 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)428 static int ieee80211_ifa_changed(struct notifier_block *nb,
429 unsigned long data, void *arg)
430 {
431 struct in_ifaddr *ifa = arg;
432 struct ieee80211_local *local =
433 container_of(nb, struct ieee80211_local,
434 ifa_notifier);
435 struct net_device *ndev = ifa->ifa_dev->dev;
436 struct wireless_dev *wdev = ndev->ieee80211_ptr;
437 struct in_device *idev;
438 struct ieee80211_sub_if_data *sdata;
439 struct ieee80211_vif_cfg *vif_cfg;
440 struct ieee80211_if_managed *ifmgd;
441 int c = 0;
442
443 /* Make sure it's our interface that got changed */
444 if (!wdev)
445 return NOTIFY_DONE;
446
447 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
448 return NOTIFY_DONE;
449
450 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
451 vif_cfg = &sdata->vif.cfg;
452
453 /* ARP filtering is only supported in managed mode */
454 if (sdata->vif.type != NL80211_IFTYPE_STATION)
455 return NOTIFY_DONE;
456
457 idev = __in_dev_get_rtnl(sdata->dev);
458 if (!idev)
459 return NOTIFY_DONE;
460
461 ifmgd = &sdata->u.mgd;
462
463 /*
464 * The nested here is needed to convince lockdep that this is
465 * all OK. Yes, we lock the wiphy mutex here while we already
466 * hold the notifier rwsem, that's the normal case. And yes,
467 * we also acquire the notifier rwsem again when unregistering
468 * a netdev while we already hold the wiphy mutex, so it does
469 * look like a typical ABBA deadlock.
470 *
471 * However, both of these things happen with the RTNL held
472 * already. Therefore, they can't actually happen, since the
473 * lock orders really are ABC and ACB, which is fine due to
474 * the RTNL (A).
475 *
476 * We still need to prevent recursion, which is accomplished
477 * by the !wdev->registered check above.
478 */
479 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
480 __acquire(&local->hw.wiphy->mtx);
481 sdata_lock(sdata);
482
483 /* Copy the addresses to the vif config list */
484 ifa = rtnl_dereference(idev->ifa_list);
485 while (ifa) {
486 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
487 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
488 ifa = rtnl_dereference(ifa->ifa_next);
489 c++;
490 }
491
492 vif_cfg->arp_addr_cnt = c;
493
494 /* Configure driver only if associated (which also implies it is up) */
495 if (ifmgd->associated)
496 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
497
498 sdata_unlock(sdata);
499 wiphy_unlock(local->hw.wiphy);
500
501 return NOTIFY_OK;
502 }
503 #endif
504
505 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)506 static int ieee80211_ifa6_changed(struct notifier_block *nb,
507 unsigned long data, void *arg)
508 {
509 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
510 struct inet6_dev *idev = ifa->idev;
511 struct net_device *ndev = ifa->idev->dev;
512 struct ieee80211_local *local =
513 container_of(nb, struct ieee80211_local, ifa6_notifier);
514 struct wireless_dev *wdev = ndev->ieee80211_ptr;
515 struct ieee80211_sub_if_data *sdata;
516
517 /* Make sure it's our interface that got changed */
518 if (!wdev || wdev->wiphy != local->hw.wiphy)
519 return NOTIFY_DONE;
520
521 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
522
523 /*
524 * For now only support station mode. This is mostly because
525 * doing AP would have to handle AP_VLAN in some way ...
526 */
527 if (sdata->vif.type != NL80211_IFTYPE_STATION)
528 return NOTIFY_DONE;
529
530 drv_ipv6_addr_change(local, sdata, idev);
531
532 return NOTIFY_OK;
533 }
534 #endif
535
536 /* There isn't a lot of sense in it, but you can transmit anything you like */
537 static const struct ieee80211_txrx_stypes
538 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
539 [NL80211_IFTYPE_ADHOC] = {
540 .tx = 0xffff,
541 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
542 BIT(IEEE80211_STYPE_AUTH >> 4) |
543 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
544 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
545 },
546 [NL80211_IFTYPE_STATION] = {
547 .tx = 0xffff,
548 /*
549 * To support Pre Association Security Negotiation (PASN) while
550 * already associated to one AP, allow user space to register to
551 * Rx authentication frames, so that the user space logic would
552 * be able to receive/handle authentication frames from a
553 * different AP as part of PASN.
554 * It is expected that user space would intelligently register
555 * for Rx authentication frames, i.e., only when PASN is used
556 * and configure a match filter only for PASN authentication
557 * algorithm, as otherwise the MLME functionality of mac80211
558 * would be broken.
559 */
560 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
561 BIT(IEEE80211_STYPE_AUTH >> 4) |
562 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
563 },
564 [NL80211_IFTYPE_AP] = {
565 .tx = 0xffff,
566 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
567 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
568 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
569 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
570 BIT(IEEE80211_STYPE_AUTH >> 4) |
571 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
572 BIT(IEEE80211_STYPE_ACTION >> 4),
573 },
574 [NL80211_IFTYPE_AP_VLAN] = {
575 /* copy AP */
576 .tx = 0xffff,
577 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
578 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
579 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
580 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
581 BIT(IEEE80211_STYPE_AUTH >> 4) |
582 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
583 BIT(IEEE80211_STYPE_ACTION >> 4),
584 },
585 [NL80211_IFTYPE_P2P_CLIENT] = {
586 .tx = 0xffff,
587 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
588 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
589 },
590 [NL80211_IFTYPE_P2P_GO] = {
591 .tx = 0xffff,
592 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
593 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
594 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
595 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
596 BIT(IEEE80211_STYPE_AUTH >> 4) |
597 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
598 BIT(IEEE80211_STYPE_ACTION >> 4),
599 },
600 [NL80211_IFTYPE_MESH_POINT] = {
601 .tx = 0xffff,
602 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
603 BIT(IEEE80211_STYPE_AUTH >> 4) |
604 BIT(IEEE80211_STYPE_DEAUTH >> 4),
605 },
606 [NL80211_IFTYPE_P2P_DEVICE] = {
607 .tx = 0xffff,
608 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
609 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
610 },
611 };
612
613 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
614 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
615 IEEE80211_HT_AMPDU_PARM_DENSITY,
616
617 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
618 IEEE80211_HT_CAP_MAX_AMSDU |
619 IEEE80211_HT_CAP_SGI_20 |
620 IEEE80211_HT_CAP_SGI_40 |
621 IEEE80211_HT_CAP_TX_STBC |
622 IEEE80211_HT_CAP_RX_STBC |
623 IEEE80211_HT_CAP_LDPC_CODING |
624 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
625 .mcs = {
626 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
627 0xff, 0xff, 0xff, 0xff, 0xff, },
628 },
629 };
630
631 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
632 .vht_cap_info =
633 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
634 IEEE80211_VHT_CAP_SHORT_GI_80 |
635 IEEE80211_VHT_CAP_SHORT_GI_160 |
636 IEEE80211_VHT_CAP_RXSTBC_MASK |
637 IEEE80211_VHT_CAP_TXSTBC |
638 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
639 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
640 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
641 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
642 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
643 .supp_mcs = {
644 .rx_mcs_map = cpu_to_le16(~0),
645 .tx_mcs_map = cpu_to_le16(~0),
646 },
647 };
648
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)649 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
650 const struct ieee80211_ops *ops,
651 const char *requested_name)
652 {
653 struct ieee80211_local *local;
654 int priv_size, i;
655 struct wiphy *wiphy;
656 bool use_chanctx;
657
658 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
659 !ops->add_interface || !ops->remove_interface ||
660 !ops->configure_filter || !ops->wake_tx_queue))
661 return NULL;
662
663 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
664 return NULL;
665
666 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
667 (ops->link_info_changed && ops->bss_info_changed)))
668 return NULL;
669
670 /* check all or no channel context operations exist */
671 i = !!ops->add_chanctx + !!ops->remove_chanctx +
672 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
673 !!ops->unassign_vif_chanctx;
674 if (WARN_ON(i != 0 && i != 5))
675 return NULL;
676 use_chanctx = i == 5;
677
678 /* Ensure 32-byte alignment of our private data and hw private data.
679 * We use the wiphy priv data for both our ieee80211_local and for
680 * the driver's private data
681 *
682 * In memory it'll be like this:
683 *
684 * +-------------------------+
685 * | struct wiphy |
686 * +-------------------------+
687 * | struct ieee80211_local |
688 * +-------------------------+
689 * | driver's private data |
690 * +-------------------------+
691 *
692 */
693 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
694
695 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
696
697 if (!wiphy)
698 return NULL;
699
700 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
701
702 wiphy->privid = mac80211_wiphy_privid;
703
704 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
705 WIPHY_FLAG_4ADDR_AP |
706 WIPHY_FLAG_4ADDR_STATION |
707 WIPHY_FLAG_REPORTS_OBSS |
708 WIPHY_FLAG_OFFCHAN_TX;
709
710 if (!use_chanctx || ops->remain_on_channel)
711 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
712
713 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
714 NL80211_FEATURE_SAE |
715 NL80211_FEATURE_HT_IBSS |
716 NL80211_FEATURE_VIF_TXPOWER |
717 NL80211_FEATURE_MAC_ON_CREATE |
718 NL80211_FEATURE_USERSPACE_MPM |
719 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
720 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
721 wiphy_ext_feature_set(wiphy,
722 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
723 wiphy_ext_feature_set(wiphy,
724 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
725 wiphy_ext_feature_set(wiphy,
726 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
727 wiphy_ext_feature_set(wiphy,
728 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
729 wiphy_ext_feature_set(wiphy,
730 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
731
732 if (!ops->hw_scan) {
733 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
734 NL80211_FEATURE_AP_SCAN;
735 /*
736 * if the driver behaves correctly using the probe request
737 * (template) from mac80211, then both of these should be
738 * supported even with hw scan - but let drivers opt in.
739 */
740 wiphy_ext_feature_set(wiphy,
741 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
742 wiphy_ext_feature_set(wiphy,
743 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
744 }
745
746 if (!ops->set_key)
747 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
748
749 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
750 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
751
752 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
753
754 local = wiphy_priv(wiphy);
755
756 if (sta_info_init(local))
757 goto err_free;
758
759 local->hw.wiphy = wiphy;
760
761 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
762
763 local->ops = ops;
764 local->use_chanctx = use_chanctx;
765
766 /*
767 * We need a bit of data queued to build aggregates properly, so
768 * instruct the TCP stack to allow more than a single ms of data
769 * to be queued in the stack. The value is a bit-shift of 1
770 * second, so 7 is ~8ms of queued data. Only affects local TCP
771 * sockets.
772 * This is the default, anyhow - drivers may need to override it
773 * for local reasons (longer buffers, longer completion time, or
774 * similar).
775 */
776 local->hw.tx_sk_pacing_shift = 7;
777
778 /* set up some defaults */
779 local->hw.queues = 1;
780 local->hw.max_rates = 1;
781 local->hw.max_report_rates = 0;
782 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
783 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
784 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
785 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
786 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
787 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
788 IEEE80211_RADIOTAP_MCS_HAVE_GI |
789 IEEE80211_RADIOTAP_MCS_HAVE_BW;
790 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
791 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
792 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
793 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
794 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
795 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
796 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
797 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
798
799 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
800
801 wiphy->extended_capabilities = local->ext_capa;
802 wiphy->extended_capabilities_mask = local->ext_capa;
803 wiphy->extended_capabilities_len =
804 ARRAY_SIZE(local->ext_capa);
805
806 INIT_LIST_HEAD(&local->interfaces);
807 INIT_LIST_HEAD(&local->mon_list);
808
809 __hw_addr_init(&local->mc_list);
810
811 mutex_init(&local->iflist_mtx);
812 mutex_init(&local->mtx);
813
814 mutex_init(&local->key_mtx);
815 spin_lock_init(&local->filter_lock);
816 spin_lock_init(&local->rx_path_lock);
817 spin_lock_init(&local->queue_stop_reason_lock);
818
819 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
820 INIT_LIST_HEAD(&local->active_txqs[i]);
821 spin_lock_init(&local->active_txq_lock[i]);
822 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
823 local->aql_txq_limit_high[i] =
824 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
825 atomic_set(&local->aql_ac_pending_airtime[i], 0);
826 }
827
828 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
829 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
830 atomic_set(&local->aql_total_pending_airtime, 0);
831
832 spin_lock_init(&local->handle_wake_tx_queue_lock);
833
834 INIT_LIST_HEAD(&local->chanctx_list);
835 mutex_init(&local->chanctx_mtx);
836
837 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
838
839 INIT_WORK(&local->restart_work, ieee80211_restart_work);
840
841 wiphy_work_init(&local->radar_detected_work,
842 ieee80211_dfs_radar_detected_work);
843
844 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
845 local->smps_mode = IEEE80211_SMPS_OFF;
846
847 INIT_WORK(&local->dynamic_ps_enable_work,
848 ieee80211_dynamic_ps_enable_work);
849 INIT_WORK(&local->dynamic_ps_disable_work,
850 ieee80211_dynamic_ps_disable_work);
851 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
852
853 wiphy_work_init(&local->sched_scan_stopped_work,
854 ieee80211_sched_scan_stopped_work);
855
856 spin_lock_init(&local->ack_status_lock);
857 idr_init(&local->ack_status_frames);
858
859 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
860 skb_queue_head_init(&local->pending[i]);
861 atomic_set(&local->agg_queue_stop[i], 0);
862 }
863 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
864 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
865 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
866
867 skb_queue_head_init(&local->skb_queue);
868 skb_queue_head_init(&local->skb_queue_unreliable);
869
870 ieee80211_alloc_led_names(local);
871
872 ieee80211_roc_setup(local);
873
874 local->hw.radiotap_timestamp.units_pos = -1;
875 local->hw.radiotap_timestamp.accuracy = -1;
876
877 return &local->hw;
878 err_free:
879 wiphy_free(wiphy);
880 return NULL;
881 }
882 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
883
ieee80211_init_cipher_suites(struct ieee80211_local * local)884 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
885 {
886 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
887 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
888 int r = 0, w = 0;
889 u32 *suites;
890 static const u32 cipher_suites[] = {
891 /* keep WEP first, it may be removed below */
892 WLAN_CIPHER_SUITE_WEP40,
893 WLAN_CIPHER_SUITE_WEP104,
894 WLAN_CIPHER_SUITE_TKIP,
895 WLAN_CIPHER_SUITE_CCMP,
896 WLAN_CIPHER_SUITE_CCMP_256,
897 WLAN_CIPHER_SUITE_GCMP,
898 WLAN_CIPHER_SUITE_GCMP_256,
899
900 /* keep last -- depends on hw flags! */
901 WLAN_CIPHER_SUITE_AES_CMAC,
902 WLAN_CIPHER_SUITE_BIP_CMAC_256,
903 WLAN_CIPHER_SUITE_BIP_GMAC_128,
904 WLAN_CIPHER_SUITE_BIP_GMAC_256,
905 };
906
907 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
908 local->hw.wiphy->cipher_suites) {
909 /* If the driver advertises, or doesn't support SW crypto,
910 * we only need to remove WEP if necessary.
911 */
912 if (have_wep)
913 return 0;
914
915 /* well if it has _no_ ciphers ... fine */
916 if (!local->hw.wiphy->n_cipher_suites)
917 return 0;
918
919 /* Driver provides cipher suites, but we need to exclude WEP */
920 suites = kmemdup(local->hw.wiphy->cipher_suites,
921 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
922 GFP_KERNEL);
923 if (!suites)
924 return -ENOMEM;
925
926 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
927 u32 suite = local->hw.wiphy->cipher_suites[r];
928
929 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
930 suite == WLAN_CIPHER_SUITE_WEP104)
931 continue;
932 suites[w++] = suite;
933 }
934 } else {
935 /* assign the (software supported and perhaps offloaded)
936 * cipher suites
937 */
938 local->hw.wiphy->cipher_suites = cipher_suites;
939 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
940
941 if (!have_mfp)
942 local->hw.wiphy->n_cipher_suites -= 4;
943
944 if (!have_wep) {
945 local->hw.wiphy->cipher_suites += 2;
946 local->hw.wiphy->n_cipher_suites -= 2;
947 }
948
949 /* not dynamically allocated, so just return */
950 return 0;
951 }
952
953 local->hw.wiphy->cipher_suites = suites;
954 local->hw.wiphy->n_cipher_suites = w;
955 local->wiphy_ciphers_allocated = true;
956
957 return 0;
958 }
959
ieee80211_register_hw(struct ieee80211_hw * hw)960 int ieee80211_register_hw(struct ieee80211_hw *hw)
961 {
962 struct ieee80211_local *local = hw_to_local(hw);
963 int result, i;
964 enum nl80211_band band;
965 int channels, max_bitrates;
966 bool supp_ht, supp_vht, supp_he, supp_eht;
967 struct cfg80211_chan_def dflt_chandef = {};
968
969 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
970 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
971 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
972 return -EINVAL;
973
974 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
975 (!local->ops->tdls_channel_switch ||
976 !local->ops->tdls_cancel_channel_switch ||
977 !local->ops->tdls_recv_channel_switch))
978 return -EOPNOTSUPP;
979
980 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
981 !local->ops->set_frag_threshold))
982 return -EINVAL;
983
984 if (WARN_ON(local->hw.wiphy->interface_modes &
985 BIT(NL80211_IFTYPE_NAN) &&
986 (!local->ops->start_nan || !local->ops->stop_nan)))
987 return -EINVAL;
988
989 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
990 /*
991 * For drivers capable of doing MLO, assume modern driver
992 * or firmware facilities, so software doesn't have to do
993 * as much, e.g. monitoring beacons would be hard if we
994 * might not even know which link is active at which time.
995 */
996 if (WARN_ON(!local->use_chanctx))
997 return -EINVAL;
998
999 if (WARN_ON(!local->ops->link_info_changed))
1000 return -EINVAL;
1001
1002 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1003 return -EINVAL;
1004
1005 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1006 return -EINVAL;
1007
1008 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1009 return -EINVAL;
1010
1011 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1012 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1013 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1014 return -EINVAL;
1015
1016 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1017 return -EINVAL;
1018
1019 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1020 return -EINVAL;
1021
1022 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1023 return -EINVAL;
1024
1025 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1026 return -EINVAL;
1027
1028 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1029 return -EINVAL;
1030
1031 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1032 return -EINVAL;
1033 }
1034
1035 #ifdef CONFIG_PM
1036 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1037 return -EINVAL;
1038 #endif
1039
1040 if (!local->use_chanctx) {
1041 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1042 const struct ieee80211_iface_combination *comb;
1043
1044 comb = &local->hw.wiphy->iface_combinations[i];
1045
1046 if (comb->num_different_channels > 1)
1047 return -EINVAL;
1048 }
1049 } else {
1050 /* DFS is not supported with multi-channel combinations yet */
1051 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1052 const struct ieee80211_iface_combination *comb;
1053
1054 comb = &local->hw.wiphy->iface_combinations[i];
1055
1056 if (comb->radar_detect_widths &&
1057 comb->num_different_channels > 1)
1058 return -EINVAL;
1059 }
1060 }
1061
1062 /* Only HW csum features are currently compatible with mac80211 */
1063 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1064 return -EINVAL;
1065
1066 if (hw->max_report_rates == 0)
1067 hw->max_report_rates = hw->max_rates;
1068
1069 local->rx_chains = 1;
1070
1071 /*
1072 * generic code guarantees at least one band,
1073 * set this very early because much code assumes
1074 * that hw.conf.channel is assigned
1075 */
1076 channels = 0;
1077 max_bitrates = 0;
1078 supp_ht = false;
1079 supp_vht = false;
1080 supp_he = false;
1081 supp_eht = false;
1082 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1083 struct ieee80211_supported_band *sband;
1084
1085 sband = local->hw.wiphy->bands[band];
1086 if (!sband)
1087 continue;
1088
1089 if (!dflt_chandef.chan) {
1090 /*
1091 * Assign the first enabled channel to dflt_chandef
1092 * from the list of channels
1093 */
1094 for (i = 0; i < sband->n_channels; i++)
1095 if (!(sband->channels[i].flags &
1096 IEEE80211_CHAN_DISABLED))
1097 break;
1098 /* if none found then use the first anyway */
1099 if (i == sband->n_channels)
1100 i = 0;
1101 cfg80211_chandef_create(&dflt_chandef,
1102 &sband->channels[i],
1103 NL80211_CHAN_NO_HT);
1104 /* init channel we're on */
1105 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1106 local->hw.conf.chandef = dflt_chandef;
1107 local->_oper_chandef = dflt_chandef;
1108 }
1109 local->monitor_chandef = dflt_chandef;
1110 }
1111
1112 channels += sband->n_channels;
1113
1114 /*
1115 * Due to the way the aggregation code handles this and it
1116 * being an HT capability, we can't really support delayed
1117 * BA in MLO (yet).
1118 */
1119 if (WARN_ON(sband->ht_cap.ht_supported &&
1120 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1121 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1122 return -EINVAL;
1123
1124 if (max_bitrates < sband->n_bitrates)
1125 max_bitrates = sband->n_bitrates;
1126 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1127 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1128
1129 for (i = 0; i < sband->n_iftype_data; i++) {
1130 const struct ieee80211_sband_iftype_data *iftd;
1131
1132 iftd = &sband->iftype_data[i];
1133
1134 supp_he = supp_he || iftd->he_cap.has_he;
1135 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1136 }
1137
1138 /* HT, VHT, HE require QoS, thus >= 4 queues */
1139 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1140 (supp_ht || supp_vht || supp_he)))
1141 return -EINVAL;
1142
1143 /* EHT requires HE support */
1144 if (WARN_ON(supp_eht && !supp_he))
1145 return -EINVAL;
1146
1147 if (!sband->ht_cap.ht_supported)
1148 continue;
1149
1150 /* TODO: consider VHT for RX chains, hopefully it's the same */
1151 local->rx_chains =
1152 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1153 local->rx_chains);
1154
1155 /* no need to mask, SM_PS_DISABLED has all bits set */
1156 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1157 IEEE80211_HT_CAP_SM_PS_SHIFT;
1158 }
1159
1160 /* if low-level driver supports AP, we also support VLAN.
1161 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1162 * based on their support to transmit SW encrypted packets.
1163 */
1164 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1165 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1166 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1167 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1168 }
1169
1170 /* mac80211 always supports monitor */
1171 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1172 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1173
1174 /* mac80211 doesn't support more than one IBSS interface right now */
1175 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1176 const struct ieee80211_iface_combination *c;
1177 int j;
1178
1179 c = &hw->wiphy->iface_combinations[i];
1180
1181 for (j = 0; j < c->n_limits; j++)
1182 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1183 c->limits[j].max > 1)
1184 return -EINVAL;
1185 }
1186
1187 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1188 sizeof(void *) * channels, GFP_KERNEL);
1189 if (!local->int_scan_req)
1190 return -ENOMEM;
1191
1192 eth_broadcast_addr(local->int_scan_req->bssid);
1193
1194 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1195 if (!local->hw.wiphy->bands[band])
1196 continue;
1197 local->int_scan_req->rates[band] = (u32) -1;
1198 }
1199
1200 #ifndef CONFIG_MAC80211_MESH
1201 /* mesh depends on Kconfig, but drivers should set it if they want */
1202 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1203 #endif
1204
1205 /* if the underlying driver supports mesh, mac80211 will (at least)
1206 * provide routing of mesh authentication frames to userspace */
1207 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1208 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1209
1210 /* mac80211 supports control port protocol changing */
1211 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1212
1213 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1214 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1215 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1216 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1217 if (hw->max_signal <= 0) {
1218 result = -EINVAL;
1219 goto fail_workqueue;
1220 }
1221 }
1222
1223 /* Mac80211 and therefore all drivers using SW crypto only
1224 * are able to handle PTK rekeys and Extended Key ID.
1225 */
1226 if (!local->ops->set_key) {
1227 wiphy_ext_feature_set(local->hw.wiphy,
1228 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1229 wiphy_ext_feature_set(local->hw.wiphy,
1230 NL80211_EXT_FEATURE_EXT_KEY_ID);
1231 }
1232
1233 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1234 wiphy_ext_feature_set(local->hw.wiphy,
1235 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1236
1237 /*
1238 * Calculate scan IE length -- we need this to alloc
1239 * memory and to subtract from the driver limit. It
1240 * includes the DS Params, (extended) supported rates, and HT
1241 * information -- SSID is the driver's responsibility.
1242 */
1243 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1244 3 /* DS Params */;
1245 if (supp_ht)
1246 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1247
1248 if (supp_vht)
1249 local->scan_ies_len +=
1250 2 + sizeof(struct ieee80211_vht_cap);
1251
1252 /*
1253 * HE cap element is variable in size - set len to allow max size */
1254 if (supp_he) {
1255 local->scan_ies_len +=
1256 3 + sizeof(struct ieee80211_he_cap_elem) +
1257 sizeof(struct ieee80211_he_mcs_nss_supp) +
1258 IEEE80211_HE_PPE_THRES_MAX_LEN;
1259
1260 if (supp_eht)
1261 local->scan_ies_len +=
1262 3 + sizeof(struct ieee80211_eht_cap_elem) +
1263 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1264 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1265 }
1266
1267 if (!local->ops->hw_scan) {
1268 /* For hw_scan, driver needs to set these up. */
1269 local->hw.wiphy->max_scan_ssids = 4;
1270 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1271 }
1272
1273 /*
1274 * If the driver supports any scan IEs, then assume the
1275 * limit includes the IEs mac80211 will add, otherwise
1276 * leave it at zero and let the driver sort it out; we
1277 * still pass our IEs to the driver but userspace will
1278 * not be allowed to in that case.
1279 */
1280 if (local->hw.wiphy->max_scan_ie_len)
1281 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1282
1283 result = ieee80211_init_cipher_suites(local);
1284 if (result < 0)
1285 goto fail_workqueue;
1286
1287 if (!local->ops->remain_on_channel)
1288 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1289
1290 /* mac80211 based drivers don't support internal TDLS setup */
1291 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1292 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1293
1294 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1295 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1296 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1297
1298 /* mac80211 supports multi BSSID, if the driver supports it */
1299 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1300 local->hw.wiphy->support_mbssid = true;
1301 if (ieee80211_hw_check(&local->hw,
1302 SUPPORTS_ONLY_HE_MULTI_BSSID))
1303 local->hw.wiphy->support_only_he_mbssid = true;
1304 else
1305 local->ext_capa[2] |=
1306 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1307 }
1308
1309 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1310
1311 /*
1312 * We use the number of queues for feature tests (QoS, HT) internally
1313 * so restrict them appropriately.
1314 */
1315 if (hw->queues > IEEE80211_MAX_QUEUES)
1316 hw->queues = IEEE80211_MAX_QUEUES;
1317
1318 local->workqueue =
1319 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1320 if (!local->workqueue) {
1321 result = -ENOMEM;
1322 goto fail_workqueue;
1323 }
1324
1325 /*
1326 * The hardware needs headroom for sending the frame,
1327 * and we need some headroom for passing the frame to monitor
1328 * interfaces, but never both at the same time.
1329 */
1330 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1331 IEEE80211_TX_STATUS_HEADROOM);
1332
1333 /*
1334 * if the driver doesn't specify a max listen interval we
1335 * use 5 which should be a safe default
1336 */
1337 if (local->hw.max_listen_interval == 0)
1338 local->hw.max_listen_interval = 5;
1339
1340 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1341
1342 local->dynamic_ps_forced_timeout = -1;
1343
1344 if (!local->hw.max_nan_de_entries)
1345 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1346
1347 if (!local->hw.weight_multiplier)
1348 local->hw.weight_multiplier = 1;
1349
1350 ieee80211_wep_init(local);
1351
1352 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1353
1354 ieee80211_led_init(local);
1355
1356 result = ieee80211_txq_setup_flows(local);
1357 if (result)
1358 goto fail_flows;
1359
1360 rtnl_lock();
1361 result = ieee80211_init_rate_ctrl_alg(local,
1362 hw->rate_control_algorithm);
1363 rtnl_unlock();
1364 if (result < 0) {
1365 wiphy_debug(local->hw.wiphy,
1366 "Failed to initialize rate control algorithm\n");
1367 goto fail_rate;
1368 }
1369
1370 if (local->rate_ctrl) {
1371 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1372 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1373 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1374 }
1375
1376 /*
1377 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1378 * or have it when we don't, copy the sband structure and set/clear it.
1379 * This is necessary because rate scaling algorithms could be switched
1380 * and have different support values.
1381 * Print a message so that in the common case the reallocation can be
1382 * avoided.
1383 */
1384 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1385 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1386 struct ieee80211_supported_band *sband;
1387 bool local_cap, ie_cap;
1388
1389 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1390
1391 sband = local->hw.wiphy->bands[band];
1392 if (!sband || !sband->vht_cap.vht_supported)
1393 continue;
1394
1395 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1396 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1397
1398 if (local_cap == ie_cap)
1399 continue;
1400
1401 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1402 if (!sband) {
1403 result = -ENOMEM;
1404 goto fail_rate;
1405 }
1406
1407 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1408 band);
1409
1410 sband->vht_cap.vht_mcs.tx_highest ^=
1411 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1412
1413 local->hw.wiphy->bands[band] = sband;
1414 local->sband_allocated |= BIT(band);
1415 }
1416
1417 result = wiphy_register(local->hw.wiphy);
1418 if (result < 0)
1419 goto fail_wiphy_register;
1420
1421 debugfs_hw_add(local);
1422 rate_control_add_debugfs(local);
1423
1424 rtnl_lock();
1425 wiphy_lock(hw->wiphy);
1426
1427 /* add one default STA interface if supported */
1428 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1429 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1430 struct vif_params params = {0};
1431
1432 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1433 NL80211_IFTYPE_STATION, ¶ms);
1434 if (result)
1435 wiphy_warn(local->hw.wiphy,
1436 "Failed to add default virtual iface\n");
1437 }
1438
1439 wiphy_unlock(hw->wiphy);
1440 rtnl_unlock();
1441
1442 #ifdef CONFIG_INET
1443 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1444 result = register_inetaddr_notifier(&local->ifa_notifier);
1445 if (result)
1446 goto fail_ifa;
1447 #endif
1448
1449 #if IS_ENABLED(CONFIG_IPV6)
1450 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1451 result = register_inet6addr_notifier(&local->ifa6_notifier);
1452 if (result)
1453 goto fail_ifa6;
1454 #endif
1455
1456 return 0;
1457
1458 #if IS_ENABLED(CONFIG_IPV6)
1459 fail_ifa6:
1460 #ifdef CONFIG_INET
1461 unregister_inetaddr_notifier(&local->ifa_notifier);
1462 #endif
1463 #endif
1464 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1465 fail_ifa:
1466 #endif
1467 wiphy_unregister(local->hw.wiphy);
1468 fail_wiphy_register:
1469 rtnl_lock();
1470 rate_control_deinitialize(local);
1471 ieee80211_remove_interfaces(local);
1472 rtnl_unlock();
1473 fail_rate:
1474 fail_flows:
1475 ieee80211_led_exit(local);
1476 destroy_workqueue(local->workqueue);
1477 fail_workqueue:
1478 if (local->wiphy_ciphers_allocated) {
1479 kfree(local->hw.wiphy->cipher_suites);
1480 local->wiphy_ciphers_allocated = false;
1481 }
1482 kfree(local->int_scan_req);
1483 return result;
1484 }
1485 EXPORT_SYMBOL(ieee80211_register_hw);
1486
ieee80211_unregister_hw(struct ieee80211_hw * hw)1487 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1488 {
1489 struct ieee80211_local *local = hw_to_local(hw);
1490
1491 tasklet_kill(&local->tx_pending_tasklet);
1492 tasklet_kill(&local->tasklet);
1493
1494 #ifdef CONFIG_INET
1495 unregister_inetaddr_notifier(&local->ifa_notifier);
1496 #endif
1497 #if IS_ENABLED(CONFIG_IPV6)
1498 unregister_inet6addr_notifier(&local->ifa6_notifier);
1499 #endif
1500
1501 rtnl_lock();
1502
1503 /*
1504 * At this point, interface list manipulations are fine
1505 * because the driver cannot be handing us frames any
1506 * more and the tasklet is killed.
1507 */
1508 ieee80211_remove_interfaces(local);
1509
1510 wiphy_lock(local->hw.wiphy);
1511 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1512 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1513 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1514 wiphy_unlock(local->hw.wiphy);
1515 rtnl_unlock();
1516
1517 cancel_work_sync(&local->restart_work);
1518 cancel_work_sync(&local->reconfig_filter);
1519
1520 ieee80211_clear_tx_pending(local);
1521 rate_control_deinitialize(local);
1522
1523 if (skb_queue_len(&local->skb_queue) ||
1524 skb_queue_len(&local->skb_queue_unreliable))
1525 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1526 skb_queue_purge(&local->skb_queue);
1527 skb_queue_purge(&local->skb_queue_unreliable);
1528
1529 wiphy_unregister(local->hw.wiphy);
1530 destroy_workqueue(local->workqueue);
1531 ieee80211_led_exit(local);
1532 kfree(local->int_scan_req);
1533 }
1534 EXPORT_SYMBOL(ieee80211_unregister_hw);
1535
ieee80211_free_ack_frame(int id,void * p,void * data)1536 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1537 {
1538 WARN_ONCE(1, "Have pending ack frames!\n");
1539 kfree_skb(p);
1540 return 0;
1541 }
1542
ieee80211_free_hw(struct ieee80211_hw * hw)1543 void ieee80211_free_hw(struct ieee80211_hw *hw)
1544 {
1545 struct ieee80211_local *local = hw_to_local(hw);
1546 enum nl80211_band band;
1547
1548 mutex_destroy(&local->iflist_mtx);
1549 mutex_destroy(&local->mtx);
1550
1551 if (local->wiphy_ciphers_allocated) {
1552 kfree(local->hw.wiphy->cipher_suites);
1553 local->wiphy_ciphers_allocated = false;
1554 }
1555
1556 idr_for_each(&local->ack_status_frames,
1557 ieee80211_free_ack_frame, NULL);
1558 idr_destroy(&local->ack_status_frames);
1559
1560 sta_info_stop(local);
1561
1562 ieee80211_free_led_names(local);
1563
1564 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1565 if (!(local->sband_allocated & BIT(band)))
1566 continue;
1567 kfree(local->hw.wiphy->bands[band]);
1568 }
1569
1570 wiphy_free(local->hw.wiphy);
1571 }
1572 EXPORT_SYMBOL(ieee80211_free_hw);
1573
1574 static const char * const drop_reasons_monitor[] = {
1575 #define V(x) #x,
1576 [0] = "RX_DROP_MONITOR",
1577 MAC80211_DROP_REASONS_MONITOR(V)
1578 };
1579
1580 static struct drop_reason_list drop_reason_list_monitor = {
1581 .reasons = drop_reasons_monitor,
1582 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1583 };
1584
1585 static const char * const drop_reasons_unusable[] = {
1586 [0] = "RX_DROP_UNUSABLE",
1587 MAC80211_DROP_REASONS_UNUSABLE(V)
1588 #undef V
1589 };
1590
1591 static struct drop_reason_list drop_reason_list_unusable = {
1592 .reasons = drop_reasons_unusable,
1593 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1594 };
1595
ieee80211_init(void)1596 static int __init ieee80211_init(void)
1597 {
1598 struct sk_buff *skb;
1599 int ret;
1600
1601 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1602 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1603 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1604
1605 ret = rc80211_minstrel_init();
1606 if (ret)
1607 return ret;
1608
1609 ret = ieee80211_iface_init();
1610 if (ret)
1611 goto err_netdev;
1612
1613 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1614 &drop_reason_list_monitor);
1615 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1616 &drop_reason_list_unusable);
1617
1618 return 0;
1619 err_netdev:
1620 rc80211_minstrel_exit();
1621
1622 return ret;
1623 }
1624
ieee80211_exit(void)1625 static void __exit ieee80211_exit(void)
1626 {
1627 rc80211_minstrel_exit();
1628
1629 ieee80211s_stop();
1630
1631 ieee80211_iface_exit();
1632
1633 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1634 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1635
1636 rcu_barrier();
1637 }
1638
1639
1640 subsys_initcall(ieee80211_init);
1641 module_exit(ieee80211_exit);
1642
1643 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1644 MODULE_LICENSE("GPL");
1645