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