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))
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 if (ops->wake_tx_queue)
723 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
724
725 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
726
727 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
728
729 local = wiphy_priv(wiphy);
730
731 if (sta_info_init(local))
732 goto err_free;
733
734 local->hw.wiphy = wiphy;
735
736 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
737
738 local->ops = ops;
739 local->use_chanctx = use_chanctx;
740
741 /*
742 * We need a bit of data queued to build aggregates properly, so
743 * instruct the TCP stack to allow more than a single ms of data
744 * to be queued in the stack. The value is a bit-shift of 1
745 * second, so 7 is ~8ms of queued data. Only affects local TCP
746 * sockets.
747 * This is the default, anyhow - drivers may need to override it
748 * for local reasons (longer buffers, longer completion time, or
749 * similar).
750 */
751 local->hw.tx_sk_pacing_shift = 7;
752
753 /* set up some defaults */
754 local->hw.queues = 1;
755 local->hw.max_rates = 1;
756 local->hw.max_report_rates = 0;
757 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
758 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
759 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
760 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
761 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
762 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
763 IEEE80211_RADIOTAP_MCS_HAVE_GI |
764 IEEE80211_RADIOTAP_MCS_HAVE_BW;
765 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
766 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
767 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
768 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
769 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
770 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
771 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
772 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
773
774 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
775
776 wiphy->extended_capabilities = local->ext_capa;
777 wiphy->extended_capabilities_mask = local->ext_capa;
778 wiphy->extended_capabilities_len =
779 ARRAY_SIZE(local->ext_capa);
780
781 INIT_LIST_HEAD(&local->interfaces);
782 INIT_LIST_HEAD(&local->mon_list);
783
784 __hw_addr_init(&local->mc_list);
785
786 mutex_init(&local->iflist_mtx);
787 mutex_init(&local->mtx);
788
789 mutex_init(&local->key_mtx);
790 spin_lock_init(&local->filter_lock);
791 spin_lock_init(&local->rx_path_lock);
792 spin_lock_init(&local->queue_stop_reason_lock);
793
794 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
795 INIT_LIST_HEAD(&local->active_txqs[i]);
796 spin_lock_init(&local->active_txq_lock[i]);
797 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
798 local->aql_txq_limit_high[i] =
799 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
800 atomic_set(&local->aql_ac_pending_airtime[i], 0);
801 }
802
803 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
804 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
805 atomic_set(&local->aql_total_pending_airtime, 0);
806
807 INIT_LIST_HEAD(&local->chanctx_list);
808 mutex_init(&local->chanctx_mtx);
809
810 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
811
812 INIT_WORK(&local->restart_work, ieee80211_restart_work);
813
814 INIT_WORK(&local->radar_detected_work,
815 ieee80211_dfs_radar_detected_work);
816
817 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
818 local->smps_mode = IEEE80211_SMPS_OFF;
819
820 INIT_WORK(&local->dynamic_ps_enable_work,
821 ieee80211_dynamic_ps_enable_work);
822 INIT_WORK(&local->dynamic_ps_disable_work,
823 ieee80211_dynamic_ps_disable_work);
824 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
825
826 INIT_WORK(&local->sched_scan_stopped_work,
827 ieee80211_sched_scan_stopped_work);
828
829 spin_lock_init(&local->ack_status_lock);
830 idr_init(&local->ack_status_frames);
831
832 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
833 skb_queue_head_init(&local->pending[i]);
834 atomic_set(&local->agg_queue_stop[i], 0);
835 }
836 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
837
838 if (ops->wake_tx_queue)
839 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
840
841 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
842
843 skb_queue_head_init(&local->skb_queue);
844 skb_queue_head_init(&local->skb_queue_unreliable);
845
846 ieee80211_alloc_led_names(local);
847
848 ieee80211_roc_setup(local);
849
850 local->hw.radiotap_timestamp.units_pos = -1;
851 local->hw.radiotap_timestamp.accuracy = -1;
852
853 return &local->hw;
854 err_free:
855 wiphy_free(wiphy);
856 return NULL;
857 }
858 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
859
ieee80211_init_cipher_suites(struct ieee80211_local * local)860 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
861 {
862 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
863 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
864 int r = 0, w = 0;
865 u32 *suites;
866 static const u32 cipher_suites[] = {
867 /* keep WEP first, it may be removed below */
868 WLAN_CIPHER_SUITE_WEP40,
869 WLAN_CIPHER_SUITE_WEP104,
870 WLAN_CIPHER_SUITE_TKIP,
871 WLAN_CIPHER_SUITE_CCMP,
872 WLAN_CIPHER_SUITE_CCMP_256,
873 WLAN_CIPHER_SUITE_GCMP,
874 WLAN_CIPHER_SUITE_GCMP_256,
875
876 /* keep last -- depends on hw flags! */
877 WLAN_CIPHER_SUITE_AES_CMAC,
878 WLAN_CIPHER_SUITE_BIP_CMAC_256,
879 WLAN_CIPHER_SUITE_BIP_GMAC_128,
880 WLAN_CIPHER_SUITE_BIP_GMAC_256,
881 };
882
883 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
884 local->hw.wiphy->cipher_suites) {
885 /* If the driver advertises, or doesn't support SW crypto,
886 * we only need to remove WEP if necessary.
887 */
888 if (have_wep)
889 return 0;
890
891 /* well if it has _no_ ciphers ... fine */
892 if (!local->hw.wiphy->n_cipher_suites)
893 return 0;
894
895 /* Driver provides cipher suites, but we need to exclude WEP */
896 suites = kmemdup(local->hw.wiphy->cipher_suites,
897 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
898 GFP_KERNEL);
899 if (!suites)
900 return -ENOMEM;
901
902 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
903 u32 suite = local->hw.wiphy->cipher_suites[r];
904
905 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
906 suite == WLAN_CIPHER_SUITE_WEP104)
907 continue;
908 suites[w++] = suite;
909 }
910 } else {
911 /* assign the (software supported and perhaps offloaded)
912 * cipher suites
913 */
914 local->hw.wiphy->cipher_suites = cipher_suites;
915 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
916
917 if (!have_mfp)
918 local->hw.wiphy->n_cipher_suites -= 4;
919
920 if (!have_wep) {
921 local->hw.wiphy->cipher_suites += 2;
922 local->hw.wiphy->n_cipher_suites -= 2;
923 }
924
925 /* not dynamically allocated, so just return */
926 return 0;
927 }
928
929 local->hw.wiphy->cipher_suites = suites;
930 local->hw.wiphy->n_cipher_suites = w;
931 local->wiphy_ciphers_allocated = true;
932
933 return 0;
934 }
935
ieee80211_register_hw(struct ieee80211_hw * hw)936 int ieee80211_register_hw(struct ieee80211_hw *hw)
937 {
938 struct ieee80211_local *local = hw_to_local(hw);
939 int result, i;
940 enum nl80211_band band;
941 int channels, max_bitrates;
942 bool supp_ht, supp_vht, supp_he, supp_eht;
943 struct cfg80211_chan_def dflt_chandef = {};
944
945 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
946 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
947 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
948 return -EINVAL;
949
950 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
951 (!local->ops->tdls_channel_switch ||
952 !local->ops->tdls_cancel_channel_switch ||
953 !local->ops->tdls_recv_channel_switch))
954 return -EOPNOTSUPP;
955
956 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
957 !local->ops->set_frag_threshold))
958 return -EINVAL;
959
960 if (WARN_ON(local->hw.wiphy->interface_modes &
961 BIT(NL80211_IFTYPE_NAN) &&
962 (!local->ops->start_nan || !local->ops->stop_nan)))
963 return -EINVAL;
964
965 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
966 /*
967 * For drivers capable of doing MLO, assume modern driver
968 * or firmware facilities, so software doesn't have to do
969 * as much, e.g. monitoring beacons would be hard if we
970 * might not even know which link is active at which time.
971 */
972 if (WARN_ON(!local->use_chanctx))
973 return -EINVAL;
974
975 if (WARN_ON(!local->ops->link_info_changed))
976 return -EINVAL;
977
978 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
979 return -EINVAL;
980
981 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
982 return -EINVAL;
983
984 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
985 return -EINVAL;
986
987 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
988 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
989 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
990 return -EINVAL;
991
992 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
993 return -EINVAL;
994
995 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
996 return -EINVAL;
997
998 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
999 return -EINVAL;
1000
1001 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1002 return -EINVAL;
1003
1004 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1005 return -EINVAL;
1006
1007 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1008 return -EINVAL;
1009 }
1010
1011 #ifdef CONFIG_PM
1012 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1013 return -EINVAL;
1014 #endif
1015
1016 if (!local->use_chanctx) {
1017 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1018 const struct ieee80211_iface_combination *comb;
1019
1020 comb = &local->hw.wiphy->iface_combinations[i];
1021
1022 if (comb->num_different_channels > 1)
1023 return -EINVAL;
1024 }
1025 } else {
1026 /* DFS is not supported with multi-channel combinations yet */
1027 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1028 const struct ieee80211_iface_combination *comb;
1029
1030 comb = &local->hw.wiphy->iface_combinations[i];
1031
1032 if (comb->radar_detect_widths &&
1033 comb->num_different_channels > 1)
1034 return -EINVAL;
1035 }
1036 }
1037
1038 /* Only HW csum features are currently compatible with mac80211 */
1039 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1040 return -EINVAL;
1041
1042 if (hw->max_report_rates == 0)
1043 hw->max_report_rates = hw->max_rates;
1044
1045 local->rx_chains = 1;
1046
1047 /*
1048 * generic code guarantees at least one band,
1049 * set this very early because much code assumes
1050 * that hw.conf.channel is assigned
1051 */
1052 channels = 0;
1053 max_bitrates = 0;
1054 supp_ht = false;
1055 supp_vht = false;
1056 supp_he = false;
1057 supp_eht = false;
1058 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1059 struct ieee80211_supported_band *sband;
1060
1061 sband = local->hw.wiphy->bands[band];
1062 if (!sband)
1063 continue;
1064
1065 if (!dflt_chandef.chan) {
1066 /*
1067 * Assign the first enabled channel to dflt_chandef
1068 * from the list of channels
1069 */
1070 for (i = 0; i < sband->n_channels; i++)
1071 if (!(sband->channels[i].flags &
1072 IEEE80211_CHAN_DISABLED))
1073 break;
1074 /* if none found then use the first anyway */
1075 if (i == sband->n_channels)
1076 i = 0;
1077 cfg80211_chandef_create(&dflt_chandef,
1078 &sband->channels[i],
1079 NL80211_CHAN_NO_HT);
1080 /* init channel we're on */
1081 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1082 local->hw.conf.chandef = dflt_chandef;
1083 local->_oper_chandef = dflt_chandef;
1084 }
1085 local->monitor_chandef = dflt_chandef;
1086 }
1087
1088 channels += sband->n_channels;
1089
1090 if (max_bitrates < sband->n_bitrates)
1091 max_bitrates = sband->n_bitrates;
1092 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1093 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1094
1095 for (i = 0; i < sband->n_iftype_data; i++) {
1096 const struct ieee80211_sband_iftype_data *iftd;
1097
1098 iftd = &sband->iftype_data[i];
1099
1100 supp_he = supp_he || iftd->he_cap.has_he;
1101 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1102 }
1103
1104 /* HT, VHT, HE require QoS, thus >= 4 queues */
1105 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1106 (supp_ht || supp_vht || supp_he)))
1107 return -EINVAL;
1108
1109 /* EHT requires HE support */
1110 if (WARN_ON(supp_eht && !supp_he))
1111 return -EINVAL;
1112
1113 if (!sband->ht_cap.ht_supported)
1114 continue;
1115
1116 /* TODO: consider VHT for RX chains, hopefully it's the same */
1117 local->rx_chains =
1118 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1119 local->rx_chains);
1120
1121 /* no need to mask, SM_PS_DISABLED has all bits set */
1122 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1123 IEEE80211_HT_CAP_SM_PS_SHIFT;
1124 }
1125
1126 /* if low-level driver supports AP, we also support VLAN.
1127 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1128 * based on their support to transmit SW encrypted packets.
1129 */
1130 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1131 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1132 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1133 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1134 }
1135
1136 /* mac80211 always supports monitor */
1137 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1138 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1139
1140 /* mac80211 doesn't support more than one IBSS interface right now */
1141 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1142 const struct ieee80211_iface_combination *c;
1143 int j;
1144
1145 c = &hw->wiphy->iface_combinations[i];
1146
1147 for (j = 0; j < c->n_limits; j++)
1148 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1149 c->limits[j].max > 1)
1150 return -EINVAL;
1151 }
1152
1153 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1154 sizeof(void *) * channels, GFP_KERNEL);
1155 if (!local->int_scan_req)
1156 return -ENOMEM;
1157
1158 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1159 if (!local->hw.wiphy->bands[band])
1160 continue;
1161 local->int_scan_req->rates[band] = (u32) -1;
1162 }
1163
1164 #ifndef CONFIG_MAC80211_MESH
1165 /* mesh depends on Kconfig, but drivers should set it if they want */
1166 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1167 #endif
1168
1169 /* if the underlying driver supports mesh, mac80211 will (at least)
1170 * provide routing of mesh authentication frames to userspace */
1171 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1172 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1173
1174 /* mac80211 supports control port protocol changing */
1175 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1176
1177 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1178 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1179 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1180 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1181 if (hw->max_signal <= 0) {
1182 result = -EINVAL;
1183 goto fail_workqueue;
1184 }
1185 }
1186
1187 /* Mac80211 and therefore all drivers using SW crypto only
1188 * are able to handle PTK rekeys and Extended Key ID.
1189 */
1190 if (!local->ops->set_key) {
1191 wiphy_ext_feature_set(local->hw.wiphy,
1192 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1193 wiphy_ext_feature_set(local->hw.wiphy,
1194 NL80211_EXT_FEATURE_EXT_KEY_ID);
1195 }
1196
1197 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1198 wiphy_ext_feature_set(local->hw.wiphy,
1199 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1200
1201 /*
1202 * Calculate scan IE length -- we need this to alloc
1203 * memory and to subtract from the driver limit. It
1204 * includes the DS Params, (extended) supported rates, and HT
1205 * information -- SSID is the driver's responsibility.
1206 */
1207 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1208 3 /* DS Params */;
1209 if (supp_ht)
1210 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1211
1212 if (supp_vht)
1213 local->scan_ies_len +=
1214 2 + sizeof(struct ieee80211_vht_cap);
1215
1216 /*
1217 * HE cap element is variable in size - set len to allow max size */
1218 if (supp_he) {
1219 local->scan_ies_len +=
1220 3 + sizeof(struct ieee80211_he_cap_elem) +
1221 sizeof(struct ieee80211_he_mcs_nss_supp) +
1222 IEEE80211_HE_PPE_THRES_MAX_LEN;
1223
1224 if (supp_eht)
1225 local->scan_ies_len +=
1226 3 + sizeof(struct ieee80211_eht_cap_elem) +
1227 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1228 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1229 }
1230
1231 if (!local->ops->hw_scan) {
1232 /* For hw_scan, driver needs to set these up. */
1233 local->hw.wiphy->max_scan_ssids = 4;
1234 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1235 }
1236
1237 /*
1238 * If the driver supports any scan IEs, then assume the
1239 * limit includes the IEs mac80211 will add, otherwise
1240 * leave it at zero and let the driver sort it out; we
1241 * still pass our IEs to the driver but userspace will
1242 * not be allowed to in that case.
1243 */
1244 if (local->hw.wiphy->max_scan_ie_len)
1245 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1246
1247 result = ieee80211_init_cipher_suites(local);
1248 if (result < 0)
1249 goto fail_workqueue;
1250
1251 if (!local->ops->remain_on_channel)
1252 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1253
1254 /* mac80211 based drivers don't support internal TDLS setup */
1255 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1256 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1257
1258 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1259 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1260 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1261
1262 /* mac80211 supports multi BSSID, if the driver supports it */
1263 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1264 local->hw.wiphy->support_mbssid = true;
1265 if (ieee80211_hw_check(&local->hw,
1266 SUPPORTS_ONLY_HE_MULTI_BSSID))
1267 local->hw.wiphy->support_only_he_mbssid = true;
1268 else
1269 local->ext_capa[2] |=
1270 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1271 }
1272
1273 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1274
1275 /*
1276 * We use the number of queues for feature tests (QoS, HT) internally
1277 * so restrict them appropriately.
1278 */
1279 if (hw->queues > IEEE80211_MAX_QUEUES)
1280 hw->queues = IEEE80211_MAX_QUEUES;
1281
1282 local->workqueue =
1283 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1284 if (!local->workqueue) {
1285 result = -ENOMEM;
1286 goto fail_workqueue;
1287 }
1288
1289 /*
1290 * The hardware needs headroom for sending the frame,
1291 * and we need some headroom for passing the frame to monitor
1292 * interfaces, but never both at the same time.
1293 */
1294 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1295 IEEE80211_TX_STATUS_HEADROOM);
1296
1297 /*
1298 * if the driver doesn't specify a max listen interval we
1299 * use 5 which should be a safe default
1300 */
1301 if (local->hw.max_listen_interval == 0)
1302 local->hw.max_listen_interval = 5;
1303
1304 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1305
1306 local->dynamic_ps_forced_timeout = -1;
1307
1308 if (!local->hw.max_nan_de_entries)
1309 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1310
1311 if (!local->hw.weight_multiplier)
1312 local->hw.weight_multiplier = 1;
1313
1314 ieee80211_wep_init(local);
1315
1316 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1317
1318 ieee80211_led_init(local);
1319
1320 result = ieee80211_txq_setup_flows(local);
1321 if (result)
1322 goto fail_flows;
1323
1324 rtnl_lock();
1325 result = ieee80211_init_rate_ctrl_alg(local,
1326 hw->rate_control_algorithm);
1327 rtnl_unlock();
1328 if (result < 0) {
1329 wiphy_debug(local->hw.wiphy,
1330 "Failed to initialize rate control algorithm\n");
1331 goto fail_rate;
1332 }
1333
1334 if (local->rate_ctrl) {
1335 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1336 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1337 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1338 }
1339
1340 /*
1341 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1342 * or have it when we don't, copy the sband structure and set/clear it.
1343 * This is necessary because rate scaling algorithms could be switched
1344 * and have different support values.
1345 * Print a message so that in the common case the reallocation can be
1346 * avoided.
1347 */
1348 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1349 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1350 struct ieee80211_supported_band *sband;
1351 bool local_cap, ie_cap;
1352
1353 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1354
1355 sband = local->hw.wiphy->bands[band];
1356 if (!sband || !sband->vht_cap.vht_supported)
1357 continue;
1358
1359 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1360 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1361
1362 if (local_cap == ie_cap)
1363 continue;
1364
1365 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1366 if (!sband) {
1367 result = -ENOMEM;
1368 goto fail_rate;
1369 }
1370
1371 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1372 band);
1373
1374 sband->vht_cap.vht_mcs.tx_highest ^=
1375 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1376
1377 local->hw.wiphy->bands[band] = sband;
1378 local->sband_allocated |= BIT(band);
1379 }
1380
1381 result = wiphy_register(local->hw.wiphy);
1382 if (result < 0)
1383 goto fail_wiphy_register;
1384
1385 debugfs_hw_add(local);
1386 rate_control_add_debugfs(local);
1387
1388 rtnl_lock();
1389 wiphy_lock(hw->wiphy);
1390
1391 /* add one default STA interface if supported */
1392 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1393 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1394 struct vif_params params = {0};
1395
1396 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1397 NL80211_IFTYPE_STATION, ¶ms);
1398 if (result)
1399 wiphy_warn(local->hw.wiphy,
1400 "Failed to add default virtual iface\n");
1401 }
1402
1403 wiphy_unlock(hw->wiphy);
1404 rtnl_unlock();
1405
1406 #ifdef CONFIG_INET
1407 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1408 result = register_inetaddr_notifier(&local->ifa_notifier);
1409 if (result)
1410 goto fail_ifa;
1411 #endif
1412
1413 #if IS_ENABLED(CONFIG_IPV6)
1414 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1415 result = register_inet6addr_notifier(&local->ifa6_notifier);
1416 if (result)
1417 goto fail_ifa6;
1418 #endif
1419
1420 return 0;
1421
1422 #if IS_ENABLED(CONFIG_IPV6)
1423 fail_ifa6:
1424 #ifdef CONFIG_INET
1425 unregister_inetaddr_notifier(&local->ifa_notifier);
1426 #endif
1427 #endif
1428 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1429 fail_ifa:
1430 #endif
1431 wiphy_unregister(local->hw.wiphy);
1432 fail_wiphy_register:
1433 rtnl_lock();
1434 rate_control_deinitialize(local);
1435 ieee80211_remove_interfaces(local);
1436 rtnl_unlock();
1437 fail_rate:
1438 fail_flows:
1439 ieee80211_led_exit(local);
1440 destroy_workqueue(local->workqueue);
1441 fail_workqueue:
1442 if (local->wiphy_ciphers_allocated) {
1443 kfree(local->hw.wiphy->cipher_suites);
1444 local->wiphy_ciphers_allocated = false;
1445 }
1446 kfree(local->int_scan_req);
1447 return result;
1448 }
1449 EXPORT_SYMBOL(ieee80211_register_hw);
1450
ieee80211_unregister_hw(struct ieee80211_hw * hw)1451 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1452 {
1453 struct ieee80211_local *local = hw_to_local(hw);
1454
1455 tasklet_kill(&local->tx_pending_tasklet);
1456 tasklet_kill(&local->tasklet);
1457
1458 #ifdef CONFIG_INET
1459 unregister_inetaddr_notifier(&local->ifa_notifier);
1460 #endif
1461 #if IS_ENABLED(CONFIG_IPV6)
1462 unregister_inet6addr_notifier(&local->ifa6_notifier);
1463 #endif
1464
1465 rtnl_lock();
1466
1467 /*
1468 * At this point, interface list manipulations are fine
1469 * because the driver cannot be handing us frames any
1470 * more and the tasklet is killed.
1471 */
1472 ieee80211_remove_interfaces(local);
1473
1474 rtnl_unlock();
1475
1476 cancel_delayed_work_sync(&local->roc_work);
1477 cancel_work_sync(&local->restart_work);
1478 cancel_work_sync(&local->reconfig_filter);
1479 flush_work(&local->sched_scan_stopped_work);
1480 flush_work(&local->radar_detected_work);
1481
1482 ieee80211_clear_tx_pending(local);
1483 rate_control_deinitialize(local);
1484
1485 if (skb_queue_len(&local->skb_queue) ||
1486 skb_queue_len(&local->skb_queue_unreliable))
1487 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1488 skb_queue_purge(&local->skb_queue);
1489 skb_queue_purge(&local->skb_queue_unreliable);
1490
1491 wiphy_unregister(local->hw.wiphy);
1492 destroy_workqueue(local->workqueue);
1493 ieee80211_led_exit(local);
1494 kfree(local->int_scan_req);
1495 }
1496 EXPORT_SYMBOL(ieee80211_unregister_hw);
1497
ieee80211_free_ack_frame(int id,void * p,void * data)1498 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1499 {
1500 WARN_ONCE(1, "Have pending ack frames!\n");
1501 kfree_skb(p);
1502 return 0;
1503 }
1504
ieee80211_free_hw(struct ieee80211_hw * hw)1505 void ieee80211_free_hw(struct ieee80211_hw *hw)
1506 {
1507 struct ieee80211_local *local = hw_to_local(hw);
1508 enum nl80211_band band;
1509
1510 mutex_destroy(&local->iflist_mtx);
1511 mutex_destroy(&local->mtx);
1512
1513 if (local->wiphy_ciphers_allocated) {
1514 kfree(local->hw.wiphy->cipher_suites);
1515 local->wiphy_ciphers_allocated = false;
1516 }
1517
1518 idr_for_each(&local->ack_status_frames,
1519 ieee80211_free_ack_frame, NULL);
1520 idr_destroy(&local->ack_status_frames);
1521
1522 sta_info_stop(local);
1523
1524 ieee80211_free_led_names(local);
1525
1526 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1527 if (!(local->sband_allocated & BIT(band)))
1528 continue;
1529 kfree(local->hw.wiphy->bands[band]);
1530 }
1531
1532 wiphy_free(local->hw.wiphy);
1533 }
1534 EXPORT_SYMBOL(ieee80211_free_hw);
1535
ieee80211_init(void)1536 static int __init ieee80211_init(void)
1537 {
1538 struct sk_buff *skb;
1539 int ret;
1540
1541 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1542 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1543 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1544
1545 ret = rc80211_minstrel_init();
1546 if (ret)
1547 return ret;
1548
1549 ret = ieee80211_iface_init();
1550 if (ret)
1551 goto err_netdev;
1552
1553 return 0;
1554 err_netdev:
1555 rc80211_minstrel_exit();
1556
1557 return ret;
1558 }
1559
ieee80211_exit(void)1560 static void __exit ieee80211_exit(void)
1561 {
1562 rc80211_minstrel_exit();
1563
1564 ieee80211s_stop();
1565
1566 ieee80211_iface_exit();
1567
1568 rcu_barrier();
1569 }
1570
1571
1572 subsys_initcall(ieee80211_init);
1573 module_exit(ieee80211_exit);
1574
1575 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1576 MODULE_LICENSE("GPL");
1577
