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) 2018-2022 Intel Corporation
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "debugfs.h"
35
ieee80211_configure_filter(struct ieee80211_local * local)36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38 u64 mc;
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
41
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
44
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
51
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
54
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
57
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
60
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
63
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
66
67 if (local->rx_mcast_action_reg)
68 new_flags |= FIF_MCAST_ACTION;
69
70 spin_lock_bh(&local->filter_lock);
71 changed_flags = local->filter_flags ^ new_flags;
72
73 mc = drv_prepare_multicast(local, &local->mc_list);
74 spin_unlock_bh(&local->filter_lock);
75
76 /* be a bit nasty */
77 new_flags |= (1<<31);
78
79 drv_configure_filter(local, changed_flags, &new_flags, mc);
80
81 WARN_ON(new_flags & (1<<31));
82
83 local->filter_flags = new_flags & ~(1<<31);
84 }
85
ieee80211_reconfig_filter(struct work_struct * work)86 static void ieee80211_reconfig_filter(struct work_struct *work)
87 {
88 struct ieee80211_local *local =
89 container_of(work, struct ieee80211_local, reconfig_filter);
90
91 ieee80211_configure_filter(local);
92 }
93
ieee80211_hw_conf_chan(struct ieee80211_local * local)94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
95 {
96 struct ieee80211_sub_if_data *sdata;
97 struct cfg80211_chan_def chandef = {};
98 u32 changed = 0;
99 int power;
100 u32 offchannel_flag;
101
102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
103
104 if (local->scan_chandef.chan) {
105 chandef = local->scan_chandef;
106 } else if (local->tmp_channel) {
107 chandef.chan = local->tmp_channel;
108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
109 chandef.center_freq1 = chandef.chan->center_freq;
110 chandef.freq1_offset = chandef.chan->freq_offset;
111 } else
112 chandef = local->_oper_chandef;
113
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
116 chandef.chan->center_freq, chandef.chan->freq_offset,
117 chandef.width, chandef.center_freq1, chandef.freq1_offset,
118 chandef.center_freq2);
119
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 else
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 }
133
134 if (!conf_is_ht(&local->hw.conf)) {
135 /*
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
139 */
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
144 }
145
146 power = ieee80211_chandef_max_power(&chandef);
147
148 rcu_read_lock();
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
151 continue;
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 continue;
154 if (sdata->vif.bss_conf.txpower == INT_MIN)
155 continue;
156 power = min(power, sdata->vif.bss_conf.txpower);
157 }
158 rcu_read_unlock();
159
160 if (local->hw.conf.power_level != power) {
161 changed |= IEEE80211_CONF_CHANGE_POWER;
162 local->hw.conf.power_level = power;
163 }
164
165 return changed;
166 }
167
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
169 {
170 int ret = 0;
171
172 might_sleep();
173
174 if (!local->use_chanctx)
175 changed |= ieee80211_hw_conf_chan(local);
176 else
177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
178 IEEE80211_CONF_CHANGE_POWER |
179 IEEE80211_CONF_CHANGE_SMPS);
180
181 if (changed && local->open_count) {
182 ret = drv_config(local, changed);
183 /*
184 * Goal:
185 * HW reconfiguration should never fail, the driver has told
186 * us what it can support so it should live up to that promise.
187 *
188 * Current status:
189 * rfkill is not integrated with mac80211 and a
190 * configuration command can thus fail if hardware rfkill
191 * is enabled
192 *
193 * FIXME: integrate rfkill with mac80211 and then add this
194 * WARN_ON() back
195 *
196 */
197 /* WARN_ON(ret); */
198 }
199
200 return ret;
201 }
202
203 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
204 BSS_CHANGED_IDLE |\
205 BSS_CHANGED_PS |\
206 BSS_CHANGED_IBSS |\
207 BSS_CHANGED_ARP_FILTER |\
208 BSS_CHANGED_SSID)
209
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)210 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
211 u64 changed)
212 {
213 struct ieee80211_local *local = sdata->local;
214
215 might_sleep();
216
217 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
218 return;
219
220 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
221 BSS_CHANGED_BEACON_ENABLED) &&
222 sdata->vif.type != NL80211_IFTYPE_AP &&
223 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
224 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
225 sdata->vif.type != NL80211_IFTYPE_OCB))
226 return;
227
228 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
229 sdata->vif.type == NL80211_IFTYPE_NAN ||
230 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
231 !sdata->vif.bss_conf.mu_mimo_owner &&
232 !(changed & BSS_CHANGED_TXPOWER))))
233 return;
234
235 if (!check_sdata_in_driver(sdata))
236 return;
237
238 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
239 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
240
241 trace_drv_vif_cfg_changed(local, sdata, changed);
242 if (local->ops->vif_cfg_changed)
243 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
244 }
245
246 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
247 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
248
249 /* FIXME: should be for each link */
250 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
251 changed);
252 if (local->ops->link_info_changed)
253 local->ops->link_info_changed(&local->hw, &sdata->vif,
254 &sdata->vif.bss_conf, ch);
255 }
256
257 if (local->ops->bss_info_changed)
258 local->ops->bss_info_changed(&local->hw, &sdata->vif,
259 &sdata->vif.bss_conf, changed);
260 trace_drv_return_void(local);
261 }
262
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)263 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
264 u64 changed)
265 {
266 struct ieee80211_local *local = sdata->local;
267
268 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
269
270 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
271 return;
272
273 drv_vif_cfg_changed(local, sdata, changed);
274 }
275
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)276 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
277 struct ieee80211_link_data *link,
278 u64 changed)
279 {
280 struct ieee80211_local *local = sdata->local;
281
282 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
283
284 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
285 return;
286
287 if (!check_sdata_in_driver(sdata))
288 return;
289
290 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
291 }
292
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)293 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
294 {
295 sdata->vif.bss_conf.use_cts_prot = false;
296 sdata->vif.bss_conf.use_short_preamble = false;
297 sdata->vif.bss_conf.use_short_slot = false;
298 return BSS_CHANGED_ERP_CTS_PROT |
299 BSS_CHANGED_ERP_PREAMBLE |
300 BSS_CHANGED_ERP_SLOT;
301 }
302
ieee80211_tasklet_handler(struct tasklet_struct * t)303 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
304 {
305 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
306 struct sk_buff *skb;
307
308 while ((skb = skb_dequeue(&local->skb_queue)) ||
309 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
310 switch (skb->pkt_type) {
311 case IEEE80211_RX_MSG:
312 /* Clear skb->pkt_type in order to not confuse kernel
313 * netstack. */
314 skb->pkt_type = 0;
315 ieee80211_rx(&local->hw, skb);
316 break;
317 case IEEE80211_TX_STATUS_MSG:
318 skb->pkt_type = 0;
319 ieee80211_tx_status(&local->hw, skb);
320 break;
321 default:
322 WARN(1, "mac80211: Packet is of unknown type %d\n",
323 skb->pkt_type);
324 dev_kfree_skb(skb);
325 break;
326 }
327 }
328 }
329
ieee80211_restart_work(struct work_struct * work)330 static void ieee80211_restart_work(struct work_struct *work)
331 {
332 struct ieee80211_local *local =
333 container_of(work, struct ieee80211_local, restart_work);
334 struct ieee80211_sub_if_data *sdata;
335 int ret;
336
337 /* wait for scan work complete */
338 flush_workqueue(local->workqueue);
339 flush_work(&local->sched_scan_stopped_work);
340 flush_work(&local->radar_detected_work);
341
342 rtnl_lock();
343 /* we might do interface manipulations, so need both */
344 wiphy_lock(local->hw.wiphy);
345
346 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
347 "%s called with hardware scan in progress\n", __func__);
348
349 list_for_each_entry(sdata, &local->interfaces, list) {
350 /*
351 * XXX: there may be more work for other vif types and even
352 * for station mode: a good thing would be to run most of
353 * the iface type's dependent _stop (ieee80211_mg_stop,
354 * ieee80211_ibss_stop) etc...
355 * For now, fix only the specific bug that was seen: race
356 * between csa_connection_drop_work and us.
357 */
358 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
359 /*
360 * This worker is scheduled from the iface worker that
361 * runs on mac80211's workqueue, so we can't be
362 * scheduling this worker after the cancel right here.
363 * The exception is ieee80211_chswitch_done.
364 * Then we can have a race...
365 */
366 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
367 if (sdata->vif.bss_conf.csa_active) {
368 sdata_lock(sdata);
369 ieee80211_sta_connection_lost(sdata,
370 WLAN_REASON_UNSPECIFIED,
371 false);
372 sdata_unlock(sdata);
373 }
374 }
375 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
376 }
377 ieee80211_scan_cancel(local);
378
379 /* make sure any new ROC will consider local->in_reconfig */
380 flush_delayed_work(&local->roc_work);
381 flush_work(&local->hw_roc_done);
382
383 /* wait for all packet processing to be done */
384 synchronize_net();
385
386 ret = ieee80211_reconfig(local);
387 wiphy_unlock(local->hw.wiphy);
388
389 if (ret)
390 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
391
392 rtnl_unlock();
393 }
394
ieee80211_restart_hw(struct ieee80211_hw * hw)395 void ieee80211_restart_hw(struct ieee80211_hw *hw)
396 {
397 struct ieee80211_local *local = hw_to_local(hw);
398
399 trace_api_restart_hw(local);
400
401 wiphy_info(hw->wiphy,
402 "Hardware restart was requested\n");
403
404 /* use this reason, ieee80211_reconfig will unblock it */
405 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
406 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
407 false);
408
409 /*
410 * Stop all Rx during the reconfig. We don't want state changes
411 * or driver callbacks while this is in progress.
412 */
413 local->in_reconfig = true;
414 barrier();
415
416 queue_work(system_freezable_wq, &local->restart_work);
417 }
418 EXPORT_SYMBOL(ieee80211_restart_hw);
419
420 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)421 static int ieee80211_ifa_changed(struct notifier_block *nb,
422 unsigned long data, void *arg)
423 {
424 struct in_ifaddr *ifa = arg;
425 struct ieee80211_local *local =
426 container_of(nb, struct ieee80211_local,
427 ifa_notifier);
428 struct net_device *ndev = ifa->ifa_dev->dev;
429 struct wireless_dev *wdev = ndev->ieee80211_ptr;
430 struct in_device *idev;
431 struct ieee80211_sub_if_data *sdata;
432 struct ieee80211_vif_cfg *vif_cfg;
433 struct ieee80211_if_managed *ifmgd;
434 int c = 0;
435
436 /* Make sure it's our interface that got changed */
437 if (!wdev)
438 return NOTIFY_DONE;
439
440 if (wdev->wiphy != local->hw.wiphy)
441 return NOTIFY_DONE;
442
443 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
444 vif_cfg = &sdata->vif.cfg;
445
446 /* ARP filtering is only supported in managed mode */
447 if (sdata->vif.type != NL80211_IFTYPE_STATION)
448 return NOTIFY_DONE;
449
450 idev = __in_dev_get_rtnl(sdata->dev);
451 if (!idev)
452 return NOTIFY_DONE;
453
454 ifmgd = &sdata->u.mgd;
455 sdata_lock(sdata);
456
457 /* Copy the addresses to the vif config list */
458 ifa = rtnl_dereference(idev->ifa_list);
459 while (ifa) {
460 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
461 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
462 ifa = rtnl_dereference(ifa->ifa_next);
463 c++;
464 }
465
466 vif_cfg->arp_addr_cnt = c;
467
468 /* Configure driver only if associated (which also implies it is up) */
469 if (ifmgd->associated)
470 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
471
472 sdata_unlock(sdata);
473
474 return NOTIFY_OK;
475 }
476 #endif
477
478 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)479 static int ieee80211_ifa6_changed(struct notifier_block *nb,
480 unsigned long data, void *arg)
481 {
482 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
483 struct inet6_dev *idev = ifa->idev;
484 struct net_device *ndev = ifa->idev->dev;
485 struct ieee80211_local *local =
486 container_of(nb, struct ieee80211_local, ifa6_notifier);
487 struct wireless_dev *wdev = ndev->ieee80211_ptr;
488 struct ieee80211_sub_if_data *sdata;
489
490 /* Make sure it's our interface that got changed */
491 if (!wdev || wdev->wiphy != local->hw.wiphy)
492 return NOTIFY_DONE;
493
494 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
495
496 /*
497 * For now only support station mode. This is mostly because
498 * doing AP would have to handle AP_VLAN in some way ...
499 */
500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
501 return NOTIFY_DONE;
502
503 drv_ipv6_addr_change(local, sdata, idev);
504
505 return NOTIFY_OK;
506 }
507 #endif
508
509 /* There isn't a lot of sense in it, but you can transmit anything you like */
510 static const struct ieee80211_txrx_stypes
511 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
512 [NL80211_IFTYPE_ADHOC] = {
513 .tx = 0xffff,
514 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
515 BIT(IEEE80211_STYPE_AUTH >> 4) |
516 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
517 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
518 },
519 [NL80211_IFTYPE_STATION] = {
520 .tx = 0xffff,
521 /*
522 * To support Pre Association Security Negotiation (PASN) while
523 * already associated to one AP, allow user space to register to
524 * Rx authentication frames, so that the user space logic would
525 * be able to receive/handle authentication frames from a
526 * different AP as part of PASN.
527 * It is expected that user space would intelligently register
528 * for Rx authentication frames, i.e., only when PASN is used
529 * and configure a match filter only for PASN authentication
530 * algorithm, as otherwise the MLME functionality of mac80211
531 * would be broken.
532 */
533 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
534 BIT(IEEE80211_STYPE_AUTH >> 4) |
535 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
536 },
537 [NL80211_IFTYPE_AP] = {
538 .tx = 0xffff,
539 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
540 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
541 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
542 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
543 BIT(IEEE80211_STYPE_AUTH >> 4) |
544 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
545 BIT(IEEE80211_STYPE_ACTION >> 4),
546 },
547 [NL80211_IFTYPE_AP_VLAN] = {
548 /* copy AP */
549 .tx = 0xffff,
550 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
551 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
552 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
553 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
554 BIT(IEEE80211_STYPE_AUTH >> 4) |
555 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
556 BIT(IEEE80211_STYPE_ACTION >> 4),
557 },
558 [NL80211_IFTYPE_P2P_CLIENT] = {
559 .tx = 0xffff,
560 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
561 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
562 },
563 [NL80211_IFTYPE_P2P_GO] = {
564 .tx = 0xffff,
565 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
566 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
567 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
568 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
569 BIT(IEEE80211_STYPE_AUTH >> 4) |
570 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
571 BIT(IEEE80211_STYPE_ACTION >> 4),
572 },
573 [NL80211_IFTYPE_MESH_POINT] = {
574 .tx = 0xffff,
575 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
576 BIT(IEEE80211_STYPE_AUTH >> 4) |
577 BIT(IEEE80211_STYPE_DEAUTH >> 4),
578 },
579 [NL80211_IFTYPE_P2P_DEVICE] = {
580 .tx = 0xffff,
581 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
582 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
583 },
584 };
585
586 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
587 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
588 IEEE80211_HT_AMPDU_PARM_DENSITY,
589
590 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
591 IEEE80211_HT_CAP_MAX_AMSDU |
592 IEEE80211_HT_CAP_SGI_20 |
593 IEEE80211_HT_CAP_SGI_40 |
594 IEEE80211_HT_CAP_TX_STBC |
595 IEEE80211_HT_CAP_RX_STBC |
596 IEEE80211_HT_CAP_LDPC_CODING |
597 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
598 .mcs = {
599 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
600 0xff, 0xff, 0xff, 0xff, 0xff, },
601 },
602 };
603
604 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
605 .vht_cap_info =
606 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
607 IEEE80211_VHT_CAP_SHORT_GI_80 |
608 IEEE80211_VHT_CAP_SHORT_GI_160 |
609 IEEE80211_VHT_CAP_RXSTBC_MASK |
610 IEEE80211_VHT_CAP_TXSTBC |
611 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
612 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
613 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
614 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
615 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
616 .supp_mcs = {
617 .rx_mcs_map = cpu_to_le16(~0),
618 .tx_mcs_map = cpu_to_le16(~0),
619 },
620 };
621
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)622 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
623 const struct ieee80211_ops *ops,
624 const char *requested_name)
625 {
626 struct ieee80211_local *local;
627 int priv_size, i;
628 struct wiphy *wiphy;
629 bool use_chanctx;
630
631 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
632 !ops->add_interface || !ops->remove_interface ||
633 !ops->configure_filter || !ops->wake_tx_queue))
634 return NULL;
635
636 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
637 return NULL;
638
639 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
640 (ops->link_info_changed && ops->bss_info_changed)))
641 return NULL;
642
643 /* check all or no channel context operations exist */
644 i = !!ops->add_chanctx + !!ops->remove_chanctx +
645 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
646 !!ops->unassign_vif_chanctx;
647 if (WARN_ON(i != 0 && i != 5))
648 return NULL;
649 use_chanctx = i == 5;
650
651 /* Ensure 32-byte alignment of our private data and hw private data.
652 * We use the wiphy priv data for both our ieee80211_local and for
653 * the driver's private data
654 *
655 * In memory it'll be like this:
656 *
657 * +-------------------------+
658 * | struct wiphy |
659 * +-------------------------+
660 * | struct ieee80211_local |
661 * +-------------------------+
662 * | driver's private data |
663 * +-------------------------+
664 *
665 */
666 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
667
668 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
669
670 if (!wiphy)
671 return NULL;
672
673 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
674
675 wiphy->privid = mac80211_wiphy_privid;
676
677 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
678 WIPHY_FLAG_4ADDR_AP |
679 WIPHY_FLAG_4ADDR_STATION |
680 WIPHY_FLAG_REPORTS_OBSS |
681 WIPHY_FLAG_OFFCHAN_TX;
682
683 if (!use_chanctx || ops->remain_on_channel)
684 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
685
686 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
687 NL80211_FEATURE_SAE |
688 NL80211_FEATURE_HT_IBSS |
689 NL80211_FEATURE_VIF_TXPOWER |
690 NL80211_FEATURE_MAC_ON_CREATE |
691 NL80211_FEATURE_USERSPACE_MPM |
692 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
693 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
694 wiphy_ext_feature_set(wiphy,
695 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
696 wiphy_ext_feature_set(wiphy,
697 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
698 wiphy_ext_feature_set(wiphy,
699 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
700 wiphy_ext_feature_set(wiphy,
701 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
702 wiphy_ext_feature_set(wiphy,
703 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
704
705 if (!ops->hw_scan) {
706 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
707 NL80211_FEATURE_AP_SCAN;
708 /*
709 * if the driver behaves correctly using the probe request
710 * (template) from mac80211, then both of these should be
711 * supported even with hw scan - but let drivers opt in.
712 */
713 wiphy_ext_feature_set(wiphy,
714 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
715 wiphy_ext_feature_set(wiphy,
716 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
717 }
718
719 if (!ops->set_key)
720 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
721
722 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
723 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
724
725 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
726
727 local = wiphy_priv(wiphy);
728
729 if (sta_info_init(local))
730 goto err_free;
731
732 local->hw.wiphy = wiphy;
733
734 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
735
736 local->ops = ops;
737 local->use_chanctx = use_chanctx;
738
739 /*
740 * We need a bit of data queued to build aggregates properly, so
741 * instruct the TCP stack to allow more than a single ms of data
742 * to be queued in the stack. The value is a bit-shift of 1
743 * second, so 7 is ~8ms of queued data. Only affects local TCP
744 * sockets.
745 * This is the default, anyhow - drivers may need to override it
746 * for local reasons (longer buffers, longer completion time, or
747 * similar).
748 */
749 local->hw.tx_sk_pacing_shift = 7;
750
751 /* set up some defaults */
752 local->hw.queues = 1;
753 local->hw.max_rates = 1;
754 local->hw.max_report_rates = 0;
755 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
756 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
757 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
758 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
759 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
760 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
761 IEEE80211_RADIOTAP_MCS_HAVE_GI |
762 IEEE80211_RADIOTAP_MCS_HAVE_BW;
763 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
764 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
765 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
766 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
767 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
768 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
769 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
770 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
771
772 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
773
774 wiphy->extended_capabilities = local->ext_capa;
775 wiphy->extended_capabilities_mask = local->ext_capa;
776 wiphy->extended_capabilities_len =
777 ARRAY_SIZE(local->ext_capa);
778
779 INIT_LIST_HEAD(&local->interfaces);
780 INIT_LIST_HEAD(&local->mon_list);
781
782 __hw_addr_init(&local->mc_list);
783
784 mutex_init(&local->iflist_mtx);
785 mutex_init(&local->mtx);
786
787 mutex_init(&local->key_mtx);
788 spin_lock_init(&local->filter_lock);
789 spin_lock_init(&local->rx_path_lock);
790 spin_lock_init(&local->queue_stop_reason_lock);
791
792 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
793 INIT_LIST_HEAD(&local->active_txqs[i]);
794 spin_lock_init(&local->active_txq_lock[i]);
795 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
796 local->aql_txq_limit_high[i] =
797 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
798 atomic_set(&local->aql_ac_pending_airtime[i], 0);
799 }
800
801 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
802 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
803 atomic_set(&local->aql_total_pending_airtime, 0);
804
805 INIT_LIST_HEAD(&local->chanctx_list);
806 mutex_init(&local->chanctx_mtx);
807
808 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
809
810 INIT_WORK(&local->restart_work, ieee80211_restart_work);
811
812 INIT_WORK(&local->radar_detected_work,
813 ieee80211_dfs_radar_detected_work);
814
815 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
816 local->smps_mode = IEEE80211_SMPS_OFF;
817
818 INIT_WORK(&local->dynamic_ps_enable_work,
819 ieee80211_dynamic_ps_enable_work);
820 INIT_WORK(&local->dynamic_ps_disable_work,
821 ieee80211_dynamic_ps_disable_work);
822 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
823
824 INIT_WORK(&local->sched_scan_stopped_work,
825 ieee80211_sched_scan_stopped_work);
826
827 spin_lock_init(&local->ack_status_lock);
828 idr_init(&local->ack_status_frames);
829
830 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
831 skb_queue_head_init(&local->pending[i]);
832 atomic_set(&local->agg_queue_stop[i], 0);
833 }
834 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
835 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
836 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
837
838 skb_queue_head_init(&local->skb_queue);
839 skb_queue_head_init(&local->skb_queue_unreliable);
840
841 ieee80211_alloc_led_names(local);
842
843 ieee80211_roc_setup(local);
844
845 local->hw.radiotap_timestamp.units_pos = -1;
846 local->hw.radiotap_timestamp.accuracy = -1;
847
848 return &local->hw;
849 err_free:
850 wiphy_free(wiphy);
851 return NULL;
852 }
853 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
854
ieee80211_init_cipher_suites(struct ieee80211_local * local)855 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
856 {
857 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
858 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
859 int r = 0, w = 0;
860 u32 *suites;
861 static const u32 cipher_suites[] = {
862 /* keep WEP first, it may be removed below */
863 WLAN_CIPHER_SUITE_WEP40,
864 WLAN_CIPHER_SUITE_WEP104,
865 WLAN_CIPHER_SUITE_TKIP,
866 WLAN_CIPHER_SUITE_CCMP,
867 WLAN_CIPHER_SUITE_CCMP_256,
868 WLAN_CIPHER_SUITE_GCMP,
869 WLAN_CIPHER_SUITE_GCMP_256,
870
871 /* keep last -- depends on hw flags! */
872 WLAN_CIPHER_SUITE_AES_CMAC,
873 WLAN_CIPHER_SUITE_BIP_CMAC_256,
874 WLAN_CIPHER_SUITE_BIP_GMAC_128,
875 WLAN_CIPHER_SUITE_BIP_GMAC_256,
876 };
877
878 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
879 local->hw.wiphy->cipher_suites) {
880 /* If the driver advertises, or doesn't support SW crypto,
881 * we only need to remove WEP if necessary.
882 */
883 if (have_wep)
884 return 0;
885
886 /* well if it has _no_ ciphers ... fine */
887 if (!local->hw.wiphy->n_cipher_suites)
888 return 0;
889
890 /* Driver provides cipher suites, but we need to exclude WEP */
891 suites = kmemdup(local->hw.wiphy->cipher_suites,
892 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
893 GFP_KERNEL);
894 if (!suites)
895 return -ENOMEM;
896
897 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
898 u32 suite = local->hw.wiphy->cipher_suites[r];
899
900 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
901 suite == WLAN_CIPHER_SUITE_WEP104)
902 continue;
903 suites[w++] = suite;
904 }
905 } else {
906 /* assign the (software supported and perhaps offloaded)
907 * cipher suites
908 */
909 local->hw.wiphy->cipher_suites = cipher_suites;
910 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
911
912 if (!have_mfp)
913 local->hw.wiphy->n_cipher_suites -= 4;
914
915 if (!have_wep) {
916 local->hw.wiphy->cipher_suites += 2;
917 local->hw.wiphy->n_cipher_suites -= 2;
918 }
919
920 /* not dynamically allocated, so just return */
921 return 0;
922 }
923
924 local->hw.wiphy->cipher_suites = suites;
925 local->hw.wiphy->n_cipher_suites = w;
926 local->wiphy_ciphers_allocated = true;
927
928 return 0;
929 }
930
ieee80211_register_hw(struct ieee80211_hw * hw)931 int ieee80211_register_hw(struct ieee80211_hw *hw)
932 {
933 struct ieee80211_local *local = hw_to_local(hw);
934 int result, i;
935 enum nl80211_band band;
936 int channels, max_bitrates;
937 bool supp_ht, supp_vht, supp_he, supp_eht;
938 struct cfg80211_chan_def dflt_chandef = {};
939
940 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
941 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
942 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
943 return -EINVAL;
944
945 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
946 (!local->ops->tdls_channel_switch ||
947 !local->ops->tdls_cancel_channel_switch ||
948 !local->ops->tdls_recv_channel_switch))
949 return -EOPNOTSUPP;
950
951 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
952 !local->ops->set_frag_threshold))
953 return -EINVAL;
954
955 if (WARN_ON(local->hw.wiphy->interface_modes &
956 BIT(NL80211_IFTYPE_NAN) &&
957 (!local->ops->start_nan || !local->ops->stop_nan)))
958 return -EINVAL;
959
960 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
961 /*
962 * For drivers capable of doing MLO, assume modern driver
963 * or firmware facilities, so software doesn't have to do
964 * as much, e.g. monitoring beacons would be hard if we
965 * might not even know which link is active at which time.
966 */
967 if (WARN_ON(!local->use_chanctx))
968 return -EINVAL;
969
970 if (WARN_ON(!local->ops->link_info_changed))
971 return -EINVAL;
972
973 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
974 return -EINVAL;
975
976 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
977 return -EINVAL;
978
979 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
980 return -EINVAL;
981
982 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
983 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
984 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
985 return -EINVAL;
986
987 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
988 return -EINVAL;
989
990 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
991 return -EINVAL;
992
993 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
994 return -EINVAL;
995
996 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
997 return -EINVAL;
998
999 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1000 return -EINVAL;
1001
1002 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1003 return -EINVAL;
1004 }
1005
1006 #ifdef CONFIG_PM
1007 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1008 return -EINVAL;
1009 #endif
1010
1011 if (!local->use_chanctx) {
1012 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1013 const struct ieee80211_iface_combination *comb;
1014
1015 comb = &local->hw.wiphy->iface_combinations[i];
1016
1017 if (comb->num_different_channels > 1)
1018 return -EINVAL;
1019 }
1020 } else {
1021 /* DFS is not supported with multi-channel combinations yet */
1022 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1023 const struct ieee80211_iface_combination *comb;
1024
1025 comb = &local->hw.wiphy->iface_combinations[i];
1026
1027 if (comb->radar_detect_widths &&
1028 comb->num_different_channels > 1)
1029 return -EINVAL;
1030 }
1031 }
1032
1033 /* Only HW csum features are currently compatible with mac80211 */
1034 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1035 return -EINVAL;
1036
1037 if (hw->max_report_rates == 0)
1038 hw->max_report_rates = hw->max_rates;
1039
1040 local->rx_chains = 1;
1041
1042 /*
1043 * generic code guarantees at least one band,
1044 * set this very early because much code assumes
1045 * that hw.conf.channel is assigned
1046 */
1047 channels = 0;
1048 max_bitrates = 0;
1049 supp_ht = false;
1050 supp_vht = false;
1051 supp_he = false;
1052 supp_eht = false;
1053 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1054 struct ieee80211_supported_band *sband;
1055
1056 sband = local->hw.wiphy->bands[band];
1057 if (!sband)
1058 continue;
1059
1060 if (!dflt_chandef.chan) {
1061 /*
1062 * Assign the first enabled channel to dflt_chandef
1063 * from the list of channels
1064 */
1065 for (i = 0; i < sband->n_channels; i++)
1066 if (!(sband->channels[i].flags &
1067 IEEE80211_CHAN_DISABLED))
1068 break;
1069 /* if none found then use the first anyway */
1070 if (i == sband->n_channels)
1071 i = 0;
1072 cfg80211_chandef_create(&dflt_chandef,
1073 &sband->channels[i],
1074 NL80211_CHAN_NO_HT);
1075 /* init channel we're on */
1076 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1077 local->hw.conf.chandef = dflt_chandef;
1078 local->_oper_chandef = dflt_chandef;
1079 }
1080 local->monitor_chandef = dflt_chandef;
1081 }
1082
1083 channels += sband->n_channels;
1084
1085 /*
1086 * Due to the way the aggregation code handles this and it
1087 * being an HT capability, we can't really support delayed
1088 * BA in MLO (yet).
1089 */
1090 if (WARN_ON(sband->ht_cap.ht_supported &&
1091 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1092 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1093 return -EINVAL;
1094
1095 if (max_bitrates < sband->n_bitrates)
1096 max_bitrates = sband->n_bitrates;
1097 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1098 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1099
1100 for (i = 0; i < sband->n_iftype_data; i++) {
1101 const struct ieee80211_sband_iftype_data *iftd;
1102
1103 iftd = &sband->iftype_data[i];
1104
1105 supp_he = supp_he || iftd->he_cap.has_he;
1106 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1107 }
1108
1109 /* HT, VHT, HE require QoS, thus >= 4 queues */
1110 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1111 (supp_ht || supp_vht || supp_he)))
1112 return -EINVAL;
1113
1114 /* EHT requires HE support */
1115 if (WARN_ON(supp_eht && !supp_he))
1116 return -EINVAL;
1117
1118 if (!sband->ht_cap.ht_supported)
1119 continue;
1120
1121 /* TODO: consider VHT for RX chains, hopefully it's the same */
1122 local->rx_chains =
1123 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1124 local->rx_chains);
1125
1126 /* no need to mask, SM_PS_DISABLED has all bits set */
1127 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1128 IEEE80211_HT_CAP_SM_PS_SHIFT;
1129 }
1130
1131 /* if low-level driver supports AP, we also support VLAN.
1132 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1133 * based on their support to transmit SW encrypted packets.
1134 */
1135 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1136 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1137 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1138 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1139 }
1140
1141 /* mac80211 always supports monitor */
1142 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1143 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1144
1145 /* mac80211 doesn't support more than one IBSS interface right now */
1146 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1147 const struct ieee80211_iface_combination *c;
1148 int j;
1149
1150 c = &hw->wiphy->iface_combinations[i];
1151
1152 for (j = 0; j < c->n_limits; j++)
1153 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1154 c->limits[j].max > 1)
1155 return -EINVAL;
1156 }
1157
1158 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1159 sizeof(void *) * channels, GFP_KERNEL);
1160 if (!local->int_scan_req)
1161 return -ENOMEM;
1162
1163 eth_broadcast_addr(local->int_scan_req->bssid);
1164
1165 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1166 if (!local->hw.wiphy->bands[band])
1167 continue;
1168 local->int_scan_req->rates[band] = (u32) -1;
1169 }
1170
1171 #ifndef CONFIG_MAC80211_MESH
1172 /* mesh depends on Kconfig, but drivers should set it if they want */
1173 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1174 #endif
1175
1176 /* if the underlying driver supports mesh, mac80211 will (at least)
1177 * provide routing of mesh authentication frames to userspace */
1178 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1179 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1180
1181 /* mac80211 supports control port protocol changing */
1182 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1183
1184 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1185 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1186 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1187 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1188 if (hw->max_signal <= 0) {
1189 result = -EINVAL;
1190 goto fail_workqueue;
1191 }
1192 }
1193
1194 /* Mac80211 and therefore all drivers using SW crypto only
1195 * are able to handle PTK rekeys and Extended Key ID.
1196 */
1197 if (!local->ops->set_key) {
1198 wiphy_ext_feature_set(local->hw.wiphy,
1199 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1200 wiphy_ext_feature_set(local->hw.wiphy,
1201 NL80211_EXT_FEATURE_EXT_KEY_ID);
1202 }
1203
1204 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1205 wiphy_ext_feature_set(local->hw.wiphy,
1206 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1207
1208 /*
1209 * Calculate scan IE length -- we need this to alloc
1210 * memory and to subtract from the driver limit. It
1211 * includes the DS Params, (extended) supported rates, and HT
1212 * information -- SSID is the driver's responsibility.
1213 */
1214 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1215 3 /* DS Params */;
1216 if (supp_ht)
1217 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1218
1219 if (supp_vht)
1220 local->scan_ies_len +=
1221 2 + sizeof(struct ieee80211_vht_cap);
1222
1223 /*
1224 * HE cap element is variable in size - set len to allow max size */
1225 if (supp_he) {
1226 local->scan_ies_len +=
1227 3 + sizeof(struct ieee80211_he_cap_elem) +
1228 sizeof(struct ieee80211_he_mcs_nss_supp) +
1229 IEEE80211_HE_PPE_THRES_MAX_LEN;
1230
1231 if (supp_eht)
1232 local->scan_ies_len +=
1233 3 + sizeof(struct ieee80211_eht_cap_elem) +
1234 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1235 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1236 }
1237
1238 if (!local->ops->hw_scan) {
1239 /* For hw_scan, driver needs to set these up. */
1240 local->hw.wiphy->max_scan_ssids = 4;
1241 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1242 }
1243
1244 /*
1245 * If the driver supports any scan IEs, then assume the
1246 * limit includes the IEs mac80211 will add, otherwise
1247 * leave it at zero and let the driver sort it out; we
1248 * still pass our IEs to the driver but userspace will
1249 * not be allowed to in that case.
1250 */
1251 if (local->hw.wiphy->max_scan_ie_len)
1252 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1253
1254 result = ieee80211_init_cipher_suites(local);
1255 if (result < 0)
1256 goto fail_workqueue;
1257
1258 if (!local->ops->remain_on_channel)
1259 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1260
1261 /* mac80211 based drivers don't support internal TDLS setup */
1262 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1263 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1264
1265 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1266 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1267 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1268
1269 /* mac80211 supports multi BSSID, if the driver supports it */
1270 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1271 local->hw.wiphy->support_mbssid = true;
1272 if (ieee80211_hw_check(&local->hw,
1273 SUPPORTS_ONLY_HE_MULTI_BSSID))
1274 local->hw.wiphy->support_only_he_mbssid = true;
1275 else
1276 local->ext_capa[2] |=
1277 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1278 }
1279
1280 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1281
1282 /*
1283 * We use the number of queues for feature tests (QoS, HT) internally
1284 * so restrict them appropriately.
1285 */
1286 if (hw->queues > IEEE80211_MAX_QUEUES)
1287 hw->queues = IEEE80211_MAX_QUEUES;
1288
1289 local->workqueue =
1290 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1291 if (!local->workqueue) {
1292 result = -ENOMEM;
1293 goto fail_workqueue;
1294 }
1295
1296 /*
1297 * The hardware needs headroom for sending the frame,
1298 * and we need some headroom for passing the frame to monitor
1299 * interfaces, but never both at the same time.
1300 */
1301 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1302 IEEE80211_TX_STATUS_HEADROOM);
1303
1304 /*
1305 * if the driver doesn't specify a max listen interval we
1306 * use 5 which should be a safe default
1307 */
1308 if (local->hw.max_listen_interval == 0)
1309 local->hw.max_listen_interval = 5;
1310
1311 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1312
1313 local->dynamic_ps_forced_timeout = -1;
1314
1315 if (!local->hw.max_nan_de_entries)
1316 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1317
1318 if (!local->hw.weight_multiplier)
1319 local->hw.weight_multiplier = 1;
1320
1321 ieee80211_wep_init(local);
1322
1323 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1324
1325 ieee80211_led_init(local);
1326
1327 result = ieee80211_txq_setup_flows(local);
1328 if (result)
1329 goto fail_flows;
1330
1331 rtnl_lock();
1332 result = ieee80211_init_rate_ctrl_alg(local,
1333 hw->rate_control_algorithm);
1334 rtnl_unlock();
1335 if (result < 0) {
1336 wiphy_debug(local->hw.wiphy,
1337 "Failed to initialize rate control algorithm\n");
1338 goto fail_rate;
1339 }
1340
1341 if (local->rate_ctrl) {
1342 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1343 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1344 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1345 }
1346
1347 /*
1348 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1349 * or have it when we don't, copy the sband structure and set/clear it.
1350 * This is necessary because rate scaling algorithms could be switched
1351 * and have different support values.
1352 * Print a message so that in the common case the reallocation can be
1353 * avoided.
1354 */
1355 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1356 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1357 struct ieee80211_supported_band *sband;
1358 bool local_cap, ie_cap;
1359
1360 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1361
1362 sband = local->hw.wiphy->bands[band];
1363 if (!sband || !sband->vht_cap.vht_supported)
1364 continue;
1365
1366 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1367 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1368
1369 if (local_cap == ie_cap)
1370 continue;
1371
1372 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1373 if (!sband) {
1374 result = -ENOMEM;
1375 goto fail_rate;
1376 }
1377
1378 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1379 band);
1380
1381 sband->vht_cap.vht_mcs.tx_highest ^=
1382 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1383
1384 local->hw.wiphy->bands[band] = sband;
1385 local->sband_allocated |= BIT(band);
1386 }
1387
1388 result = wiphy_register(local->hw.wiphy);
1389 if (result < 0)
1390 goto fail_wiphy_register;
1391
1392 debugfs_hw_add(local);
1393 rate_control_add_debugfs(local);
1394
1395 rtnl_lock();
1396 wiphy_lock(hw->wiphy);
1397
1398 /* add one default STA interface if supported */
1399 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1400 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1401 struct vif_params params = {0};
1402
1403 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1404 NL80211_IFTYPE_STATION, ¶ms);
1405 if (result)
1406 wiphy_warn(local->hw.wiphy,
1407 "Failed to add default virtual iface\n");
1408 }
1409
1410 wiphy_unlock(hw->wiphy);
1411 rtnl_unlock();
1412
1413 #ifdef CONFIG_INET
1414 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1415 result = register_inetaddr_notifier(&local->ifa_notifier);
1416 if (result)
1417 goto fail_ifa;
1418 #endif
1419
1420 #if IS_ENABLED(CONFIG_IPV6)
1421 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1422 result = register_inet6addr_notifier(&local->ifa6_notifier);
1423 if (result)
1424 goto fail_ifa6;
1425 #endif
1426
1427 return 0;
1428
1429 #if IS_ENABLED(CONFIG_IPV6)
1430 fail_ifa6:
1431 #ifdef CONFIG_INET
1432 unregister_inetaddr_notifier(&local->ifa_notifier);
1433 #endif
1434 #endif
1435 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1436 fail_ifa:
1437 #endif
1438 wiphy_unregister(local->hw.wiphy);
1439 fail_wiphy_register:
1440 rtnl_lock();
1441 rate_control_deinitialize(local);
1442 ieee80211_remove_interfaces(local);
1443 rtnl_unlock();
1444 fail_rate:
1445 fail_flows:
1446 ieee80211_led_exit(local);
1447 destroy_workqueue(local->workqueue);
1448 fail_workqueue:
1449 if (local->wiphy_ciphers_allocated) {
1450 kfree(local->hw.wiphy->cipher_suites);
1451 local->wiphy_ciphers_allocated = false;
1452 }
1453 kfree(local->int_scan_req);
1454 return result;
1455 }
1456 EXPORT_SYMBOL(ieee80211_register_hw);
1457
ieee80211_unregister_hw(struct ieee80211_hw * hw)1458 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1459 {
1460 struct ieee80211_local *local = hw_to_local(hw);
1461
1462 tasklet_kill(&local->tx_pending_tasklet);
1463 tasklet_kill(&local->tasklet);
1464
1465 #ifdef CONFIG_INET
1466 unregister_inetaddr_notifier(&local->ifa_notifier);
1467 #endif
1468 #if IS_ENABLED(CONFIG_IPV6)
1469 unregister_inet6addr_notifier(&local->ifa6_notifier);
1470 #endif
1471
1472 rtnl_lock();
1473
1474 /*
1475 * At this point, interface list manipulations are fine
1476 * because the driver cannot be handing us frames any
1477 * more and the tasklet is killed.
1478 */
1479 ieee80211_remove_interfaces(local);
1480
1481 rtnl_unlock();
1482
1483 cancel_delayed_work_sync(&local->roc_work);
1484 cancel_work_sync(&local->restart_work);
1485 cancel_work_sync(&local->reconfig_filter);
1486 flush_work(&local->sched_scan_stopped_work);
1487 flush_work(&local->radar_detected_work);
1488
1489 ieee80211_clear_tx_pending(local);
1490 rate_control_deinitialize(local);
1491
1492 if (skb_queue_len(&local->skb_queue) ||
1493 skb_queue_len(&local->skb_queue_unreliable))
1494 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1495 skb_queue_purge(&local->skb_queue);
1496 skb_queue_purge(&local->skb_queue_unreliable);
1497
1498 wiphy_unregister(local->hw.wiphy);
1499 destroy_workqueue(local->workqueue);
1500 ieee80211_led_exit(local);
1501 kfree(local->int_scan_req);
1502 }
1503 EXPORT_SYMBOL(ieee80211_unregister_hw);
1504
ieee80211_free_ack_frame(int id,void * p,void * data)1505 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1506 {
1507 WARN_ONCE(1, "Have pending ack frames!\n");
1508 kfree_skb(p);
1509 return 0;
1510 }
1511
ieee80211_free_hw(struct ieee80211_hw * hw)1512 void ieee80211_free_hw(struct ieee80211_hw *hw)
1513 {
1514 struct ieee80211_local *local = hw_to_local(hw);
1515 enum nl80211_band band;
1516
1517 mutex_destroy(&local->iflist_mtx);
1518 mutex_destroy(&local->mtx);
1519
1520 if (local->wiphy_ciphers_allocated) {
1521 kfree(local->hw.wiphy->cipher_suites);
1522 local->wiphy_ciphers_allocated = false;
1523 }
1524
1525 idr_for_each(&local->ack_status_frames,
1526 ieee80211_free_ack_frame, NULL);
1527 idr_destroy(&local->ack_status_frames);
1528
1529 sta_info_stop(local);
1530
1531 ieee80211_free_led_names(local);
1532
1533 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1534 if (!(local->sband_allocated & BIT(band)))
1535 continue;
1536 kfree(local->hw.wiphy->bands[band]);
1537 }
1538
1539 wiphy_free(local->hw.wiphy);
1540 }
1541 EXPORT_SYMBOL(ieee80211_free_hw);
1542
ieee80211_init(void)1543 static int __init ieee80211_init(void)
1544 {
1545 struct sk_buff *skb;
1546 int ret;
1547
1548 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1549 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1550 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1551
1552 ret = rc80211_minstrel_init();
1553 if (ret)
1554 return ret;
1555
1556 ret = ieee80211_iface_init();
1557 if (ret)
1558 goto err_netdev;
1559
1560 return 0;
1561 err_netdev:
1562 rc80211_minstrel_exit();
1563
1564 return ret;
1565 }
1566
ieee80211_exit(void)1567 static void __exit ieee80211_exit(void)
1568 {
1569 rc80211_minstrel_exit();
1570
1571 ieee80211s_stop();
1572
1573 ieee80211_iface_exit();
1574
1575 rcu_barrier();
1576 }
1577
1578
1579 subsys_initcall(ieee80211_init);
1580 module_exit(ieee80211_exit);
1581
1582 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1583 MODULE_LICENSE("GPL");
1584