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