1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2023 Intel Corporation
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/dropreason.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wep.h"
34 #include "led.h"
35 #include "debugfs.h"
36
ieee80211_configure_filter(struct ieee80211_local * local)37 void ieee80211_configure_filter(struct ieee80211_local *local)
38 {
39 u64 mc;
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
42
43 if (atomic_read(&local->iff_allmultis))
44 new_flags |= FIF_ALLMULTI;
45
46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
48 new_flags |= FIF_BCN_PRBRESP_PROMISC;
49
50 if (local->fif_probe_req || local->probe_req_reg)
51 new_flags |= FIF_PROBE_REQ;
52
53 if (local->fif_fcsfail)
54 new_flags |= FIF_FCSFAIL;
55
56 if (local->fif_plcpfail)
57 new_flags |= FIF_PLCPFAIL;
58
59 if (local->fif_control)
60 new_flags |= FIF_CONTROL;
61
62 if (local->fif_other_bss)
63 new_flags |= FIF_OTHER_BSS;
64
65 if (local->fif_pspoll)
66 new_flags |= FIF_PSPOLL;
67
68 if (local->rx_mcast_action_reg)
69 new_flags |= FIF_MCAST_ACTION;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
ieee80211_reconfig_filter(struct wiphy * wiphy,struct wiphy_work * work)87 static void ieee80211_reconfig_filter(struct wiphy *wiphy,
88 struct wiphy_work *work)
89 {
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
92
93 ieee80211_configure_filter(local);
94 }
95
ieee80211_calc_hw_conf_chan(struct ieee80211_local * local,struct ieee80211_chanctx_conf * ctx)96 static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local,
97 struct ieee80211_chanctx_conf *ctx)
98 {
99 struct ieee80211_sub_if_data *sdata;
100 struct cfg80211_chan_def chandef = {};
101 struct cfg80211_chan_def *oper = NULL;
102 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC;
103 u32 changed = 0;
104 int power;
105 u32 offchannel_flag;
106
107 if (!local->emulate_chanctx)
108 return 0;
109
110 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
111
112 if (ctx && !WARN_ON(!ctx->def.chan)) {
113 oper = &ctx->def;
114 if (ctx->rx_chains_static > 1)
115 smps_mode = IEEE80211_SMPS_OFF;
116 else if (ctx->rx_chains_dynamic > 1)
117 smps_mode = IEEE80211_SMPS_DYNAMIC;
118 else
119 smps_mode = IEEE80211_SMPS_STATIC;
120 }
121
122 if (local->scan_chandef.chan) {
123 chandef = local->scan_chandef;
124 } else if (local->tmp_channel) {
125 chandef.chan = local->tmp_channel;
126 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
127 chandef.center_freq1 = chandef.chan->center_freq;
128 chandef.freq1_offset = chandef.chan->freq_offset;
129 } else if (oper) {
130 chandef = *oper;
131 } else {
132 chandef = local->dflt_chandef;
133 }
134
135 if (WARN(!cfg80211_chandef_valid(&chandef),
136 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
137 chandef.chan ? chandef.chan->center_freq : -1,
138 chandef.chan ? chandef.chan->freq_offset : 0,
139 chandef.width, chandef.center_freq1, chandef.freq1_offset,
140 chandef.center_freq2))
141 return 0;
142
143 if (!oper || !cfg80211_chandef_identical(&chandef, oper))
144 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
145 else
146 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
147
148 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
149
150 /* force it also for scanning, since drivers might config differently */
151 if (offchannel_flag || local->scanning || local->in_reconfig ||
152 !cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) {
153 local->hw.conf.chandef = chandef;
154 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
155 }
156
157 if (!conf_is_ht(&local->hw.conf)) {
158 /*
159 * mac80211.h documents that this is only valid
160 * when the channel is set to an HT type, and
161 * that otherwise STATIC is used.
162 */
163 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
164 } else if (local->hw.conf.smps_mode != smps_mode) {
165 local->hw.conf.smps_mode = smps_mode;
166 changed |= IEEE80211_CONF_CHANGE_SMPS;
167 }
168
169 power = ieee80211_chandef_max_power(&chandef);
170 if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
171 power = min(local->user_power_level, power);
172
173 rcu_read_lock();
174 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
175 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
176 continue;
177 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
178 continue;
179 if (sdata->vif.bss_conf.txpower == INT_MIN)
180 continue;
181 power = min(power, sdata->vif.bss_conf.txpower);
182 }
183 rcu_read_unlock();
184
185 if (local->hw.conf.power_level != power) {
186 changed |= IEEE80211_CONF_CHANGE_POWER;
187 local->hw.conf.power_level = power;
188 }
189
190 return changed;
191 }
192
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)193 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
194 {
195 int ret = 0;
196
197 might_sleep();
198
199 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
200 IEEE80211_CONF_CHANGE_POWER |
201 IEEE80211_CONF_CHANGE_SMPS));
202
203 if (changed && local->open_count) {
204 ret = drv_config(local, changed);
205 /*
206 * Goal:
207 * HW reconfiguration should never fail, the driver has told
208 * us what it can support so it should live up to that promise.
209 *
210 * Current status:
211 * rfkill is not integrated with mac80211 and a
212 * configuration command can thus fail if hardware rfkill
213 * is enabled
214 *
215 * FIXME: integrate rfkill with mac80211 and then add this
216 * WARN_ON() back
217 *
218 */
219 /* WARN_ON(ret); */
220 }
221
222 return ret;
223 }
224
225 /* for scanning, offchannel and chanctx emulation only */
_ieee80211_hw_conf_chan(struct ieee80211_local * local,struct ieee80211_chanctx_conf * ctx)226 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
227 struct ieee80211_chanctx_conf *ctx)
228 {
229 u32 changed;
230
231 if (!local->open_count)
232 return 0;
233
234 changed = ieee80211_calc_hw_conf_chan(local, ctx);
235 if (!changed)
236 return 0;
237
238 return drv_config(local, changed);
239 }
240
ieee80211_hw_conf_chan(struct ieee80211_local * local)241 int ieee80211_hw_conf_chan(struct ieee80211_local *local)
242 {
243 struct ieee80211_chanctx *ctx;
244
245 ctx = list_first_entry_or_null(&local->chanctx_list,
246 struct ieee80211_chanctx,
247 list);
248
249 return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL);
250 }
251
ieee80211_hw_conf_init(struct ieee80211_local * local)252 void ieee80211_hw_conf_init(struct ieee80211_local *local)
253 {
254 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
255 IEEE80211_CONF_CHANGE_POWER |
256 IEEE80211_CONF_CHANGE_SMPS);
257
258 if (WARN_ON(!local->open_count))
259 return;
260
261 if (local->emulate_chanctx) {
262 struct ieee80211_chanctx *ctx;
263
264 ctx = list_first_entry_or_null(&local->chanctx_list,
265 struct ieee80211_chanctx,
266 list);
267
268 changed |= ieee80211_calc_hw_conf_chan(local,
269 ctx ? &ctx->conf : NULL);
270 }
271
272 WARN_ON(drv_config(local, changed));
273 }
274
ieee80211_emulate_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)275 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
276 struct ieee80211_chanctx_conf *ctx)
277 {
278 struct ieee80211_local *local = hw_to_local(hw);
279
280 local->hw.conf.radar_enabled = ctx->radar_enabled;
281
282 return _ieee80211_hw_conf_chan(local, ctx);
283 }
284 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
285
ieee80211_emulate_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx)286 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
287 struct ieee80211_chanctx_conf *ctx)
288 {
289 struct ieee80211_local *local = hw_to_local(hw);
290
291 local->hw.conf.radar_enabled = false;
292
293 _ieee80211_hw_conf_chan(local, NULL);
294 }
295 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
296
ieee80211_emulate_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * ctx,u32 changed)297 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
298 struct ieee80211_chanctx_conf *ctx,
299 u32 changed)
300 {
301 struct ieee80211_local *local = hw_to_local(hw);
302
303 local->hw.conf.radar_enabled = ctx->radar_enabled;
304
305 _ieee80211_hw_conf_chan(local, ctx);
306 }
307 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
308
ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif_chanctx_switch * vifs,int n_vifs,enum ieee80211_chanctx_switch_mode mode)309 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
310 struct ieee80211_vif_chanctx_switch *vifs,
311 int n_vifs,
312 enum ieee80211_chanctx_switch_mode mode)
313 {
314 struct ieee80211_local *local = hw_to_local(hw);
315
316 if (n_vifs <= 0)
317 return -EINVAL;
318
319 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
320 _ieee80211_hw_conf_chan(local, vifs[0].new_ctx);
321
322 return 0;
323 }
324 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
325
326 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
327 BSS_CHANGED_IDLE |\
328 BSS_CHANGED_PS |\
329 BSS_CHANGED_IBSS |\
330 BSS_CHANGED_ARP_FILTER |\
331 BSS_CHANGED_SSID |\
332 BSS_CHANGED_MLD_VALID_LINKS |\
333 BSS_CHANGED_MLD_TTLM)
334
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)335 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
336 u64 changed)
337 {
338 struct ieee80211_local *local = sdata->local;
339
340 might_sleep();
341
342 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif));
343
344 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
345 return;
346
347 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
348 BSS_CHANGED_BEACON_ENABLED) &&
349 sdata->vif.type != NL80211_IFTYPE_AP &&
350 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
351 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
352 sdata->vif.type != NL80211_IFTYPE_OCB))
353 return;
354
355 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
356 sdata->vif.type == NL80211_IFTYPE_NAN ||
357 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
358 !sdata->vif.bss_conf.mu_mimo_owner &&
359 !(changed & BSS_CHANGED_TXPOWER))))
360 return;
361
362 if (!check_sdata_in_driver(sdata))
363 return;
364
365 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
366 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
367
368 trace_drv_vif_cfg_changed(local, sdata, changed);
369 if (local->ops->vif_cfg_changed)
370 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
371 }
372
373 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
374 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
375
376 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
377 changed);
378 if (local->ops->link_info_changed)
379 local->ops->link_info_changed(&local->hw, &sdata->vif,
380 &sdata->vif.bss_conf, ch);
381 }
382
383 if (local->ops->bss_info_changed)
384 local->ops->bss_info_changed(&local->hw, &sdata->vif,
385 &sdata->vif.bss_conf, changed);
386 trace_drv_return_void(local);
387 }
388
ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data * sdata,u64 changed)389 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
390 u64 changed)
391 {
392 struct ieee80211_local *local = sdata->local;
393
394 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
395
396 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
397 return;
398
399 drv_vif_cfg_changed(local, sdata, changed);
400 }
401
ieee80211_link_info_change_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,u64 changed)402 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
403 struct ieee80211_link_data *link,
404 u64 changed)
405 {
406 struct ieee80211_local *local = sdata->local;
407
408 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
409
410 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
411 return;
412
413 if (!check_sdata_in_driver(sdata))
414 return;
415
416 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
417 }
418
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)419 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
420 {
421 sdata->vif.bss_conf.use_cts_prot = false;
422 sdata->vif.bss_conf.use_short_preamble = false;
423 sdata->vif.bss_conf.use_short_slot = false;
424 return BSS_CHANGED_ERP_CTS_PROT |
425 BSS_CHANGED_ERP_PREAMBLE |
426 BSS_CHANGED_ERP_SLOT;
427 }
428
429 /* context: requires softirqs disabled */
ieee80211_handle_queued_frames(struct ieee80211_local * local)430 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
431 {
432 struct sk_buff *skb;
433
434 while ((skb = skb_dequeue(&local->skb_queue)) ||
435 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
436 switch (skb->pkt_type) {
437 case IEEE80211_RX_MSG:
438 /* Clear skb->pkt_type in order to not confuse kernel
439 * netstack. */
440 skb->pkt_type = 0;
441 ieee80211_rx(&local->hw, skb);
442 break;
443 case IEEE80211_TX_STATUS_MSG:
444 skb->pkt_type = 0;
445 ieee80211_tx_status_skb(&local->hw, skb);
446 break;
447 default:
448 WARN(1, "mac80211: Packet is of unknown type %d\n",
449 skb->pkt_type);
450 dev_kfree_skb(skb);
451 break;
452 }
453 }
454 }
455
ieee80211_tasklet_handler(struct tasklet_struct * t)456 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
457 {
458 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
459
460 ieee80211_handle_queued_frames(local);
461 }
462
ieee80211_restart_work(struct work_struct * work)463 static void ieee80211_restart_work(struct work_struct *work)
464 {
465 struct ieee80211_local *local =
466 container_of(work, struct ieee80211_local, restart_work);
467 struct ieee80211_sub_if_data *sdata;
468 int ret;
469
470 flush_workqueue(local->workqueue);
471
472 rtnl_lock();
473 /* we might do interface manipulations, so need both */
474 wiphy_lock(local->hw.wiphy);
475 wiphy_work_flush(local->hw.wiphy, NULL);
476
477 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
478 "%s called with hardware scan in progress\n", __func__);
479
480 list_for_each_entry(sdata, &local->interfaces, list) {
481 /*
482 * XXX: there may be more work for other vif types and even
483 * for station mode: a good thing would be to run most of
484 * the iface type's dependent _stop (ieee80211_mg_stop,
485 * ieee80211_ibss_stop) etc...
486 * For now, fix only the specific bug that was seen: race
487 * between csa_connection_drop_work and us.
488 */
489 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
490 /*
491 * This worker is scheduled from the iface worker that
492 * runs on mac80211's workqueue, so we can't be
493 * scheduling this worker after the cancel right here.
494 * The exception is ieee80211_chswitch_done.
495 * Then we can have a race...
496 */
497 wiphy_work_cancel(local->hw.wiphy,
498 &sdata->u.mgd.csa_connection_drop_work);
499 if (sdata->vif.bss_conf.csa_active)
500 ieee80211_sta_connection_lost(sdata,
501 WLAN_REASON_UNSPECIFIED,
502 false);
503 }
504 wiphy_delayed_work_flush(local->hw.wiphy,
505 &sdata->dec_tailroom_needed_wk);
506 }
507 ieee80211_scan_cancel(local);
508
509 /* make sure any new ROC will consider local->in_reconfig */
510 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
511 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
512
513 /* wait for all packet processing to be done */
514 synchronize_net();
515
516 ret = ieee80211_reconfig(local);
517 wiphy_unlock(local->hw.wiphy);
518
519 if (ret)
520 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
521
522 rtnl_unlock();
523 }
524
ieee80211_restart_hw(struct ieee80211_hw * hw)525 void ieee80211_restart_hw(struct ieee80211_hw *hw)
526 {
527 struct ieee80211_local *local = hw_to_local(hw);
528
529 trace_api_restart_hw(local);
530
531 wiphy_info(hw->wiphy,
532 "Hardware restart was requested\n");
533
534 /* use this reason, ieee80211_reconfig will unblock it */
535 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
536 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
537 false);
538
539 /*
540 * Stop all Rx during the reconfig. We don't want state changes
541 * or driver callbacks while this is in progress.
542 */
543 local->in_reconfig = true;
544 barrier();
545
546 queue_work(system_freezable_wq, &local->restart_work);
547 }
548 EXPORT_SYMBOL(ieee80211_restart_hw);
549
550 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)551 static int ieee80211_ifa_changed(struct notifier_block *nb,
552 unsigned long data, void *arg)
553 {
554 struct in_ifaddr *ifa = arg;
555 struct ieee80211_local *local =
556 container_of(nb, struct ieee80211_local,
557 ifa_notifier);
558 struct net_device *ndev = ifa->ifa_dev->dev;
559 struct wireless_dev *wdev = ndev->ieee80211_ptr;
560 struct in_device *idev;
561 struct ieee80211_sub_if_data *sdata;
562 struct ieee80211_vif_cfg *vif_cfg;
563 struct ieee80211_if_managed *ifmgd;
564 int c = 0;
565
566 /* Make sure it's our interface that got changed */
567 if (!wdev)
568 return NOTIFY_DONE;
569
570 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
571 return NOTIFY_DONE;
572
573 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
574 vif_cfg = &sdata->vif.cfg;
575
576 /* ARP filtering is only supported in managed mode */
577 if (sdata->vif.type != NL80211_IFTYPE_STATION)
578 return NOTIFY_DONE;
579
580 idev = __in_dev_get_rtnl(sdata->dev);
581 if (!idev)
582 return NOTIFY_DONE;
583
584 ifmgd = &sdata->u.mgd;
585
586 /*
587 * The nested here is needed to convince lockdep that this is
588 * all OK. Yes, we lock the wiphy mutex here while we already
589 * hold the notifier rwsem, that's the normal case. And yes,
590 * we also acquire the notifier rwsem again when unregistering
591 * a netdev while we already hold the wiphy mutex, so it does
592 * look like a typical ABBA deadlock.
593 *
594 * However, both of these things happen with the RTNL held
595 * already. Therefore, they can't actually happen, since the
596 * lock orders really are ABC and ACB, which is fine due to
597 * the RTNL (A).
598 *
599 * We still need to prevent recursion, which is accomplished
600 * by the !wdev->registered check above.
601 */
602 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
603 __acquire(&local->hw.wiphy->mtx);
604
605 /* Copy the addresses to the vif config list */
606 ifa = rtnl_dereference(idev->ifa_list);
607 while (ifa) {
608 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
609 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
610 ifa = rtnl_dereference(ifa->ifa_next);
611 c++;
612 }
613
614 vif_cfg->arp_addr_cnt = c;
615
616 /* Configure driver only if associated (which also implies it is up) */
617 if (ifmgd->associated)
618 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
619
620 wiphy_unlock(local->hw.wiphy);
621
622 return NOTIFY_OK;
623 }
624 #endif
625
626 #if IS_ENABLED(CONFIG_IPV6)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)627 static int ieee80211_ifa6_changed(struct notifier_block *nb,
628 unsigned long data, void *arg)
629 {
630 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
631 struct inet6_dev *idev = ifa->idev;
632 struct net_device *ndev = ifa->idev->dev;
633 struct ieee80211_local *local =
634 container_of(nb, struct ieee80211_local, ifa6_notifier);
635 struct wireless_dev *wdev = ndev->ieee80211_ptr;
636 struct ieee80211_sub_if_data *sdata;
637
638 /* Make sure it's our interface that got changed */
639 if (!wdev || wdev->wiphy != local->hw.wiphy)
640 return NOTIFY_DONE;
641
642 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
643
644 /*
645 * For now only support station mode. This is mostly because
646 * doing AP would have to handle AP_VLAN in some way ...
647 */
648 if (sdata->vif.type != NL80211_IFTYPE_STATION)
649 return NOTIFY_DONE;
650
651 drv_ipv6_addr_change(local, sdata, idev);
652
653 return NOTIFY_OK;
654 }
655 #endif
656
657 /* There isn't a lot of sense in it, but you can transmit anything you like */
658 static const struct ieee80211_txrx_stypes
659 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
660 [NL80211_IFTYPE_ADHOC] = {
661 .tx = 0xffff,
662 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
663 BIT(IEEE80211_STYPE_AUTH >> 4) |
664 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
665 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
666 },
667 [NL80211_IFTYPE_STATION] = {
668 .tx = 0xffff,
669 /*
670 * To support Pre Association Security Negotiation (PASN) while
671 * already associated to one AP, allow user space to register to
672 * Rx authentication frames, so that the user space logic would
673 * be able to receive/handle authentication frames from a
674 * different AP as part of PASN.
675 * It is expected that user space would intelligently register
676 * for Rx authentication frames, i.e., only when PASN is used
677 * and configure a match filter only for PASN authentication
678 * algorithm, as otherwise the MLME functionality of mac80211
679 * would be broken.
680 */
681 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
682 BIT(IEEE80211_STYPE_AUTH >> 4) |
683 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
684 },
685 [NL80211_IFTYPE_AP] = {
686 .tx = 0xffff,
687 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
688 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
689 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
690 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
691 BIT(IEEE80211_STYPE_AUTH >> 4) |
692 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
693 BIT(IEEE80211_STYPE_ACTION >> 4),
694 },
695 [NL80211_IFTYPE_AP_VLAN] = {
696 /* copy AP */
697 .tx = 0xffff,
698 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
699 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
700 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
701 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
702 BIT(IEEE80211_STYPE_AUTH >> 4) |
703 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
704 BIT(IEEE80211_STYPE_ACTION >> 4),
705 },
706 [NL80211_IFTYPE_P2P_CLIENT] = {
707 .tx = 0xffff,
708 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
709 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
710 },
711 [NL80211_IFTYPE_P2P_GO] = {
712 .tx = 0xffff,
713 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
714 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
715 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
716 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
717 BIT(IEEE80211_STYPE_AUTH >> 4) |
718 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
719 BIT(IEEE80211_STYPE_ACTION >> 4),
720 },
721 [NL80211_IFTYPE_MESH_POINT] = {
722 .tx = 0xffff,
723 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
724 BIT(IEEE80211_STYPE_AUTH >> 4) |
725 BIT(IEEE80211_STYPE_DEAUTH >> 4),
726 },
727 [NL80211_IFTYPE_P2P_DEVICE] = {
728 .tx = 0xffff,
729 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
730 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
731 },
732 };
733
734 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
735 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
736 IEEE80211_HT_AMPDU_PARM_DENSITY,
737
738 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
739 IEEE80211_HT_CAP_MAX_AMSDU |
740 IEEE80211_HT_CAP_SGI_20 |
741 IEEE80211_HT_CAP_SGI_40 |
742 IEEE80211_HT_CAP_TX_STBC |
743 IEEE80211_HT_CAP_RX_STBC |
744 IEEE80211_HT_CAP_LDPC_CODING |
745 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
746 .mcs = {
747 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
748 0xff, 0xff, 0xff, 0xff, 0xff, },
749 },
750 };
751
752 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
753 .vht_cap_info =
754 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
755 IEEE80211_VHT_CAP_SHORT_GI_80 |
756 IEEE80211_VHT_CAP_SHORT_GI_160 |
757 IEEE80211_VHT_CAP_RXSTBC_MASK |
758 IEEE80211_VHT_CAP_TXSTBC |
759 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
760 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
761 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
762 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
763 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
764 .supp_mcs = {
765 .rx_mcs_map = cpu_to_le16(~0),
766 .tx_mcs_map = cpu_to_le16(~0),
767 },
768 };
769
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)770 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
771 const struct ieee80211_ops *ops,
772 const char *requested_name)
773 {
774 struct ieee80211_local *local;
775 int priv_size, i;
776 struct wiphy *wiphy;
777 bool emulate_chanctx;
778
779 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
780 !ops->add_interface || !ops->remove_interface ||
781 !ops->configure_filter || !ops->wake_tx_queue))
782 return NULL;
783
784 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
785 return NULL;
786
787 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
788 (ops->link_info_changed && ops->bss_info_changed)))
789 return NULL;
790
791 /* check all or no channel context operations exist */
792 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
793 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
794 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
795 if (WARN_ON(ops->assign_vif_chanctx ||
796 ops->unassign_vif_chanctx))
797 return NULL;
798 emulate_chanctx = true;
799 } else {
800 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
801 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
802 ops->change_chanctx == ieee80211_emulate_change_chanctx))
803 return NULL;
804 if (WARN_ON(!ops->add_chanctx ||
805 !ops->remove_chanctx ||
806 !ops->change_chanctx ||
807 !ops->assign_vif_chanctx ||
808 !ops->unassign_vif_chanctx))
809 return NULL;
810 emulate_chanctx = false;
811 }
812
813 /* Ensure 32-byte alignment of our private data and hw private data.
814 * We use the wiphy priv data for both our ieee80211_local and for
815 * the driver's private data
816 *
817 * In memory it'll be like this:
818 *
819 * +-------------------------+
820 * | struct wiphy |
821 * +-------------------------+
822 * | struct ieee80211_local |
823 * +-------------------------+
824 * | driver's private data |
825 * +-------------------------+
826 *
827 */
828 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
829
830 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
831
832 if (!wiphy)
833 return NULL;
834
835 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
836
837 wiphy->privid = mac80211_wiphy_privid;
838
839 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
840 WIPHY_FLAG_4ADDR_AP |
841 WIPHY_FLAG_4ADDR_STATION |
842 WIPHY_FLAG_REPORTS_OBSS |
843 WIPHY_FLAG_OFFCHAN_TX;
844
845 if (emulate_chanctx || ops->remain_on_channel)
846 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
847
848 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
849 NL80211_FEATURE_SAE |
850 NL80211_FEATURE_HT_IBSS |
851 NL80211_FEATURE_VIF_TXPOWER |
852 NL80211_FEATURE_MAC_ON_CREATE |
853 NL80211_FEATURE_USERSPACE_MPM |
854 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
855 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
856 wiphy_ext_feature_set(wiphy,
857 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
858 wiphy_ext_feature_set(wiphy,
859 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
860 wiphy_ext_feature_set(wiphy,
861 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
862 wiphy_ext_feature_set(wiphy,
863 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
864 wiphy_ext_feature_set(wiphy,
865 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
866
867 if (!ops->hw_scan) {
868 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
869 NL80211_FEATURE_AP_SCAN;
870 /*
871 * if the driver behaves correctly using the probe request
872 * (template) from mac80211, then both of these should be
873 * supported even with hw scan - but let drivers opt in.
874 */
875 wiphy_ext_feature_set(wiphy,
876 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
877 wiphy_ext_feature_set(wiphy,
878 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
879 }
880
881 if (!ops->set_key) {
882 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
883 wiphy_ext_feature_set(wiphy,
884 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
885 }
886
887 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
888 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
889
890 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
891
892 local = wiphy_priv(wiphy);
893
894 if (sta_info_init(local))
895 goto err_free;
896
897 local->hw.wiphy = wiphy;
898
899 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
900
901 local->ops = ops;
902 local->emulate_chanctx = emulate_chanctx;
903
904 if (emulate_chanctx)
905 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
906
907 /*
908 * We need a bit of data queued to build aggregates properly, so
909 * instruct the TCP stack to allow more than a single ms of data
910 * to be queued in the stack. The value is a bit-shift of 1
911 * second, so 7 is ~8ms of queued data. Only affects local TCP
912 * sockets.
913 * This is the default, anyhow - drivers may need to override it
914 * for local reasons (longer buffers, longer completion time, or
915 * similar).
916 */
917 local->hw.tx_sk_pacing_shift = 7;
918
919 /* set up some defaults */
920 local->hw.queues = 1;
921 local->hw.max_rates = 1;
922 local->hw.max_report_rates = 0;
923 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
924 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
925 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
926 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
927 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
928 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
929 IEEE80211_RADIOTAP_MCS_HAVE_GI |
930 IEEE80211_RADIOTAP_MCS_HAVE_BW;
931 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
932 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
933 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
934 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
935 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
936 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
937 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
938 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
939
940 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
941
942 wiphy->extended_capabilities = local->ext_capa;
943 wiphy->extended_capabilities_mask = local->ext_capa;
944 wiphy->extended_capabilities_len =
945 ARRAY_SIZE(local->ext_capa);
946
947 INIT_LIST_HEAD(&local->interfaces);
948 INIT_LIST_HEAD(&local->mon_list);
949
950 __hw_addr_init(&local->mc_list);
951
952 mutex_init(&local->iflist_mtx);
953 spin_lock_init(&local->filter_lock);
954 spin_lock_init(&local->rx_path_lock);
955 spin_lock_init(&local->queue_stop_reason_lock);
956
957 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
958 INIT_LIST_HEAD(&local->active_txqs[i]);
959 spin_lock_init(&local->active_txq_lock[i]);
960 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
961 local->aql_txq_limit_high[i] =
962 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
963 atomic_set(&local->aql_ac_pending_airtime[i], 0);
964 }
965
966 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
967 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
968 atomic_set(&local->aql_total_pending_airtime, 0);
969
970 spin_lock_init(&local->handle_wake_tx_queue_lock);
971
972 INIT_LIST_HEAD(&local->chanctx_list);
973
974 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
975
976 INIT_WORK(&local->restart_work, ieee80211_restart_work);
977
978 wiphy_work_init(&local->radar_detected_work,
979 ieee80211_dfs_radar_detected_work);
980
981 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
982
983 wiphy_work_init(&local->dynamic_ps_enable_work,
984 ieee80211_dynamic_ps_enable_work);
985 wiphy_work_init(&local->dynamic_ps_disable_work,
986 ieee80211_dynamic_ps_disable_work);
987 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
988
989 wiphy_work_init(&local->sched_scan_stopped_work,
990 ieee80211_sched_scan_stopped_work);
991
992 spin_lock_init(&local->ack_status_lock);
993 idr_init(&local->ack_status_frames);
994
995 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
996 skb_queue_head_init(&local->pending[i]);
997 atomic_set(&local->agg_queue_stop[i], 0);
998 }
999 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
1000 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
1001 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
1002
1003 skb_queue_head_init(&local->skb_queue);
1004 skb_queue_head_init(&local->skb_queue_unreliable);
1005
1006 ieee80211_alloc_led_names(local);
1007
1008 ieee80211_roc_setup(local);
1009
1010 local->hw.radiotap_timestamp.units_pos = -1;
1011 local->hw.radiotap_timestamp.accuracy = -1;
1012
1013 return &local->hw;
1014 err_free:
1015 wiphy_free(wiphy);
1016 return NULL;
1017 }
1018 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1019
ieee80211_init_cipher_suites(struct ieee80211_local * local)1020 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1021 {
1022 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
1023 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1024 int r = 0, w = 0;
1025 u32 *suites;
1026 static const u32 cipher_suites[] = {
1027 /* keep WEP first, it may be removed below */
1028 WLAN_CIPHER_SUITE_WEP40,
1029 WLAN_CIPHER_SUITE_WEP104,
1030 WLAN_CIPHER_SUITE_TKIP,
1031 WLAN_CIPHER_SUITE_CCMP,
1032 WLAN_CIPHER_SUITE_CCMP_256,
1033 WLAN_CIPHER_SUITE_GCMP,
1034 WLAN_CIPHER_SUITE_GCMP_256,
1035
1036 /* keep last -- depends on hw flags! */
1037 WLAN_CIPHER_SUITE_AES_CMAC,
1038 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1039 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1040 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1041 };
1042
1043 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
1044 local->hw.wiphy->cipher_suites) {
1045 /* If the driver advertises, or doesn't support SW crypto,
1046 * we only need to remove WEP if necessary.
1047 */
1048 if (have_wep)
1049 return 0;
1050
1051 /* well if it has _no_ ciphers ... fine */
1052 if (!local->hw.wiphy->n_cipher_suites)
1053 return 0;
1054
1055 /* Driver provides cipher suites, but we need to exclude WEP */
1056 suites = kmemdup_array(local->hw.wiphy->cipher_suites,
1057 local->hw.wiphy->n_cipher_suites,
1058 sizeof(u32), GFP_KERNEL);
1059 if (!suites)
1060 return -ENOMEM;
1061
1062 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
1063 u32 suite = local->hw.wiphy->cipher_suites[r];
1064
1065 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
1066 suite == WLAN_CIPHER_SUITE_WEP104)
1067 continue;
1068 suites[w++] = suite;
1069 }
1070 } else {
1071 /* assign the (software supported and perhaps offloaded)
1072 * cipher suites
1073 */
1074 local->hw.wiphy->cipher_suites = cipher_suites;
1075 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1076
1077 if (!have_mfp)
1078 local->hw.wiphy->n_cipher_suites -= 4;
1079
1080 if (!have_wep) {
1081 local->hw.wiphy->cipher_suites += 2;
1082 local->hw.wiphy->n_cipher_suites -= 2;
1083 }
1084
1085 /* not dynamically allocated, so just return */
1086 return 0;
1087 }
1088
1089 local->hw.wiphy->cipher_suites = suites;
1090 local->hw.wiphy->n_cipher_suites = w;
1091 local->wiphy_ciphers_allocated = true;
1092
1093 return 0;
1094 }
1095
1096 static bool
ieee80211_ifcomb_check(const struct ieee80211_iface_combination * c,int n_comb)1097 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
1098 {
1099 int i, j;
1100
1101 for (i = 0; i < n_comb; i++, c++) {
1102 /* DFS is not supported with multi-channel combinations yet */
1103 if (c->radar_detect_widths &&
1104 c->num_different_channels > 1)
1105 return false;
1106
1107 /* mac80211 doesn't support more than one IBSS interface */
1108 for (j = 0; j < c->n_limits; j++)
1109 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1110 c->limits[j].max > 1)
1111 return false;
1112 }
1113
1114 return true;
1115 }
1116
ieee80211_register_hw(struct ieee80211_hw * hw)1117 int ieee80211_register_hw(struct ieee80211_hw *hw)
1118 {
1119 struct ieee80211_local *local = hw_to_local(hw);
1120 int result, i;
1121 enum nl80211_band band;
1122 int channels, max_bitrates;
1123 bool supp_ht, supp_vht, supp_he, supp_eht;
1124 struct cfg80211_chan_def dflt_chandef = {};
1125
1126 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1127 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1128 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1129 return -EINVAL;
1130
1131 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1132 (!local->ops->tdls_channel_switch ||
1133 !local->ops->tdls_cancel_channel_switch ||
1134 !local->ops->tdls_recv_channel_switch))
1135 return -EOPNOTSUPP;
1136
1137 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1138 !local->ops->set_frag_threshold))
1139 return -EINVAL;
1140
1141 if (WARN_ON(local->hw.wiphy->interface_modes &
1142 BIT(NL80211_IFTYPE_NAN) &&
1143 (!local->ops->start_nan || !local->ops->stop_nan)))
1144 return -EINVAL;
1145
1146 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1147 /*
1148 * For drivers capable of doing MLO, assume modern driver
1149 * or firmware facilities, so software doesn't have to do
1150 * as much, e.g. monitoring beacons would be hard if we
1151 * might not even know which link is active at which time.
1152 */
1153 if (WARN_ON(local->emulate_chanctx))
1154 return -EINVAL;
1155
1156 if (WARN_ON(!local->ops->link_info_changed))
1157 return -EINVAL;
1158
1159 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1160 return -EINVAL;
1161
1162 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1163 return -EINVAL;
1164
1165 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1166 return -EINVAL;
1167
1168 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1169 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1170 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1171 return -EINVAL;
1172
1173 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1174 return -EINVAL;
1175
1176 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1177 return -EINVAL;
1178
1179 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1180 return -EINVAL;
1181
1182 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1183 return -EINVAL;
1184
1185 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1186 return -EINVAL;
1187 }
1188
1189 #ifdef CONFIG_PM
1190 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1191 return -EINVAL;
1192 #endif
1193
1194 if (local->emulate_chanctx) {
1195 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1196 const struct ieee80211_iface_combination *comb;
1197
1198 comb = &local->hw.wiphy->iface_combinations[i];
1199
1200 if (comb->num_different_channels > 1)
1201 return -EINVAL;
1202 }
1203 }
1204
1205 if (hw->wiphy->n_radio) {
1206 for (i = 0; i < hw->wiphy->n_radio; i++) {
1207 const struct wiphy_radio *radio = &hw->wiphy->radio[i];
1208
1209 if (!ieee80211_ifcomb_check(radio->iface_combinations,
1210 radio->n_iface_combinations))
1211 return -EINVAL;
1212 }
1213 } else {
1214 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
1215 hw->wiphy->n_iface_combinations))
1216 return -EINVAL;
1217 }
1218
1219 /* Only HW csum features are currently compatible with mac80211 */
1220 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1221 return -EINVAL;
1222
1223 if (hw->max_report_rates == 0)
1224 hw->max_report_rates = hw->max_rates;
1225
1226 local->rx_chains = 1;
1227
1228 /*
1229 * generic code guarantees at least one band,
1230 * set this very early because much code assumes
1231 * that hw.conf.channel is assigned
1232 */
1233 channels = 0;
1234 max_bitrates = 0;
1235 supp_ht = false;
1236 supp_vht = false;
1237 supp_he = false;
1238 supp_eht = false;
1239 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1240 const struct ieee80211_sband_iftype_data *iftd;
1241 struct ieee80211_supported_band *sband;
1242
1243 sband = local->hw.wiphy->bands[band];
1244 if (!sband)
1245 continue;
1246
1247 if (!dflt_chandef.chan) {
1248 /*
1249 * Assign the first enabled channel to dflt_chandef
1250 * from the list of channels
1251 */
1252 for (i = 0; i < sband->n_channels; i++)
1253 if (!(sband->channels[i].flags &
1254 IEEE80211_CHAN_DISABLED))
1255 break;
1256 /* if none found then use the first anyway */
1257 if (i == sband->n_channels)
1258 i = 0;
1259 cfg80211_chandef_create(&dflt_chandef,
1260 &sband->channels[i],
1261 NL80211_CHAN_NO_HT);
1262 /* init channel we're on */
1263 local->monitor_chanreq.oper = dflt_chandef;
1264 if (local->emulate_chanctx) {
1265 local->dflt_chandef = dflt_chandef;
1266 local->hw.conf.chandef = dflt_chandef;
1267 }
1268 }
1269
1270 channels += sband->n_channels;
1271
1272 /*
1273 * Due to the way the aggregation code handles this and it
1274 * being an HT capability, we can't really support delayed
1275 * BA in MLO (yet).
1276 */
1277 if (WARN_ON(sband->ht_cap.ht_supported &&
1278 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1279 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1280 return -EINVAL;
1281
1282 if (max_bitrates < sband->n_bitrates)
1283 max_bitrates = sband->n_bitrates;
1284 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1285 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1286
1287 for_each_sband_iftype_data(sband, i, iftd) {
1288 u8 he_40_mhz_cap;
1289
1290 supp_he = supp_he || iftd->he_cap.has_he;
1291 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1292
1293 if (band == NL80211_BAND_2GHZ)
1294 he_40_mhz_cap =
1295 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1296 else
1297 he_40_mhz_cap =
1298 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1299
1300 /* currently no support for HE client where HT has 40 MHz but not HT */
1301 if (iftd->he_cap.has_he &&
1302 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1303 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1304 sband->ht_cap.ht_supported &&
1305 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1306 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1307 return -EINVAL;
1308 }
1309
1310 /* HT, VHT, HE require QoS, thus >= 4 queues */
1311 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1312 (supp_ht || supp_vht || supp_he)))
1313 return -EINVAL;
1314
1315 /* EHT requires HE support */
1316 if (WARN_ON(supp_eht && !supp_he))
1317 return -EINVAL;
1318
1319 if (!sband->ht_cap.ht_supported)
1320 continue;
1321
1322 /* TODO: consider VHT for RX chains, hopefully it's the same */
1323 local->rx_chains =
1324 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1325 local->rx_chains);
1326
1327 /* no need to mask, SM_PS_DISABLED has all bits set */
1328 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1329 IEEE80211_HT_CAP_SM_PS_SHIFT;
1330 }
1331
1332 /* if low-level driver supports AP, we also support VLAN.
1333 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1334 * based on their support to transmit SW encrypted packets.
1335 */
1336 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1337 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1338 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1339 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1340 }
1341
1342 /* mac80211 always supports monitor */
1343 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1344 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1345
1346
1347 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1348 sizeof(void *) * channels, GFP_KERNEL);
1349 if (!local->int_scan_req)
1350 return -ENOMEM;
1351
1352 eth_broadcast_addr(local->int_scan_req->bssid);
1353
1354 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1355 if (!local->hw.wiphy->bands[band])
1356 continue;
1357 local->int_scan_req->rates[band] = (u32) -1;
1358 }
1359
1360 #ifndef CONFIG_MAC80211_MESH
1361 /* mesh depends on Kconfig, but drivers should set it if they want */
1362 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1363 #endif
1364
1365 /* if the underlying driver supports mesh, mac80211 will (at least)
1366 * provide routing of mesh authentication frames to userspace */
1367 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1368 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1369
1370 /* mac80211 supports control port protocol changing */
1371 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1372
1373 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1374 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1375 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1376 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1377 if (hw->max_signal <= 0) {
1378 result = -EINVAL;
1379 goto fail_workqueue;
1380 }
1381 }
1382
1383 /* Mac80211 and therefore all drivers using SW crypto only
1384 * are able to handle PTK rekeys and Extended Key ID.
1385 */
1386 if (!local->ops->set_key) {
1387 wiphy_ext_feature_set(local->hw.wiphy,
1388 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1389 wiphy_ext_feature_set(local->hw.wiphy,
1390 NL80211_EXT_FEATURE_EXT_KEY_ID);
1391 }
1392
1393 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1394 wiphy_ext_feature_set(local->hw.wiphy,
1395 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1396
1397 /*
1398 * Calculate scan IE length -- we need this to alloc
1399 * memory and to subtract from the driver limit. It
1400 * includes the DS Params, (extended) supported rates, and HT
1401 * information -- SSID is the driver's responsibility.
1402 */
1403 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1404 3 /* DS Params */;
1405 if (supp_ht)
1406 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1407
1408 if (supp_vht)
1409 local->scan_ies_len +=
1410 2 + sizeof(struct ieee80211_vht_cap);
1411
1412 /*
1413 * HE cap element is variable in size - set len to allow max size */
1414 if (supp_he) {
1415 local->scan_ies_len +=
1416 3 + sizeof(struct ieee80211_he_cap_elem) +
1417 sizeof(struct ieee80211_he_mcs_nss_supp) +
1418 IEEE80211_HE_PPE_THRES_MAX_LEN;
1419
1420 if (supp_eht)
1421 local->scan_ies_len +=
1422 3 + sizeof(struct ieee80211_eht_cap_elem) +
1423 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1424 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1425 }
1426
1427 if (!local->ops->hw_scan) {
1428 /* For hw_scan, driver needs to set these up. */
1429 local->hw.wiphy->max_scan_ssids = 4;
1430 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1431 }
1432
1433 /*
1434 * If the driver supports any scan IEs, then assume the
1435 * limit includes the IEs mac80211 will add, otherwise
1436 * leave it at zero and let the driver sort it out; we
1437 * still pass our IEs to the driver but userspace will
1438 * not be allowed to in that case.
1439 */
1440 if (local->hw.wiphy->max_scan_ie_len)
1441 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1442
1443 result = ieee80211_init_cipher_suites(local);
1444 if (result < 0)
1445 goto fail_workqueue;
1446
1447 if (!local->ops->remain_on_channel)
1448 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1449
1450 /* mac80211 based drivers don't support internal TDLS setup */
1451 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1452 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1453
1454 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1455 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1456 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1457
1458 /* mac80211 supports multi BSSID, if the driver supports it */
1459 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1460 local->hw.wiphy->support_mbssid = true;
1461 if (ieee80211_hw_check(&local->hw,
1462 SUPPORTS_ONLY_HE_MULTI_BSSID))
1463 local->hw.wiphy->support_only_he_mbssid = true;
1464 else
1465 local->ext_capa[2] |=
1466 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1467 }
1468
1469 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1470
1471 /*
1472 * We use the number of queues for feature tests (QoS, HT) internally
1473 * so restrict them appropriately.
1474 */
1475 if (hw->queues > IEEE80211_MAX_QUEUES)
1476 hw->queues = IEEE80211_MAX_QUEUES;
1477
1478 local->workqueue =
1479 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1480 if (!local->workqueue) {
1481 result = -ENOMEM;
1482 goto fail_workqueue;
1483 }
1484
1485 /*
1486 * The hardware needs headroom for sending the frame,
1487 * and we need some headroom for passing the frame to monitor
1488 * interfaces, but never both at the same time.
1489 */
1490 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1491 IEEE80211_TX_STATUS_HEADROOM);
1492
1493 /*
1494 * if the driver doesn't specify a max listen interval we
1495 * use 5 which should be a safe default
1496 */
1497 if (local->hw.max_listen_interval == 0)
1498 local->hw.max_listen_interval = 5;
1499
1500 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1501
1502 local->dynamic_ps_forced_timeout = -1;
1503
1504 if (!local->hw.max_nan_de_entries)
1505 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1506
1507 if (!local->hw.weight_multiplier)
1508 local->hw.weight_multiplier = 1;
1509
1510 ieee80211_wep_init(local);
1511
1512 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1513
1514 ieee80211_led_init(local);
1515
1516 result = ieee80211_txq_setup_flows(local);
1517 if (result)
1518 goto fail_flows;
1519
1520 rtnl_lock();
1521 result = ieee80211_init_rate_ctrl_alg(local,
1522 hw->rate_control_algorithm);
1523 rtnl_unlock();
1524 if (result < 0) {
1525 wiphy_debug(local->hw.wiphy,
1526 "Failed to initialize rate control algorithm\n");
1527 goto fail_rate;
1528 }
1529
1530 if (local->rate_ctrl) {
1531 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1532 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1533 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1534 }
1535
1536 /*
1537 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1538 * or have it when we don't, copy the sband structure and set/clear it.
1539 * This is necessary because rate scaling algorithms could be switched
1540 * and have different support values.
1541 * Print a message so that in the common case the reallocation can be
1542 * avoided.
1543 */
1544 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1545 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1546 struct ieee80211_supported_band *sband;
1547 bool local_cap, ie_cap;
1548
1549 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1550
1551 sband = local->hw.wiphy->bands[band];
1552 if (!sband || !sband->vht_cap.vht_supported)
1553 continue;
1554
1555 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1556 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1557
1558 if (local_cap == ie_cap)
1559 continue;
1560
1561 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1562 if (!sband) {
1563 result = -ENOMEM;
1564 goto fail_rate;
1565 }
1566
1567 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1568 band);
1569
1570 sband->vht_cap.vht_mcs.tx_highest ^=
1571 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1572
1573 local->hw.wiphy->bands[band] = sband;
1574 local->sband_allocated |= BIT(band);
1575 }
1576
1577 result = wiphy_register(local->hw.wiphy);
1578 if (result < 0)
1579 goto fail_wiphy_register;
1580
1581 debugfs_hw_add(local);
1582 rate_control_add_debugfs(local);
1583
1584 ieee80211_check_wbrf_support(local);
1585
1586 rtnl_lock();
1587 wiphy_lock(hw->wiphy);
1588
1589 /* add one default STA interface if supported */
1590 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1591 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1592 struct vif_params params = {0};
1593
1594 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1595 NL80211_IFTYPE_STATION, ¶ms);
1596 if (result)
1597 wiphy_warn(local->hw.wiphy,
1598 "Failed to add default virtual iface\n");
1599 }
1600
1601 wiphy_unlock(hw->wiphy);
1602 rtnl_unlock();
1603
1604 #ifdef CONFIG_INET
1605 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1606 result = register_inetaddr_notifier(&local->ifa_notifier);
1607 if (result)
1608 goto fail_ifa;
1609 #endif
1610
1611 #if IS_ENABLED(CONFIG_IPV6)
1612 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1613 result = register_inet6addr_notifier(&local->ifa6_notifier);
1614 if (result)
1615 goto fail_ifa6;
1616 #endif
1617
1618 return 0;
1619
1620 #if IS_ENABLED(CONFIG_IPV6)
1621 fail_ifa6:
1622 #ifdef CONFIG_INET
1623 unregister_inetaddr_notifier(&local->ifa_notifier);
1624 #endif
1625 #endif
1626 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1627 fail_ifa:
1628 #endif
1629 wiphy_unregister(local->hw.wiphy);
1630 fail_wiphy_register:
1631 rtnl_lock();
1632 rate_control_deinitialize(local);
1633 ieee80211_remove_interfaces(local);
1634 rtnl_unlock();
1635 fail_rate:
1636 ieee80211_txq_teardown_flows(local);
1637 fail_flows:
1638 ieee80211_led_exit(local);
1639 destroy_workqueue(local->workqueue);
1640 fail_workqueue:
1641 if (local->wiphy_ciphers_allocated) {
1642 kfree(local->hw.wiphy->cipher_suites);
1643 local->wiphy_ciphers_allocated = false;
1644 }
1645 kfree(local->int_scan_req);
1646 return result;
1647 }
1648 EXPORT_SYMBOL(ieee80211_register_hw);
1649
ieee80211_unregister_hw(struct ieee80211_hw * hw)1650 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1651 {
1652 struct ieee80211_local *local = hw_to_local(hw);
1653
1654 tasklet_kill(&local->tx_pending_tasklet);
1655 tasklet_kill(&local->tasklet);
1656
1657 #ifdef CONFIG_INET
1658 unregister_inetaddr_notifier(&local->ifa_notifier);
1659 #endif
1660 #if IS_ENABLED(CONFIG_IPV6)
1661 unregister_inet6addr_notifier(&local->ifa6_notifier);
1662 #endif
1663
1664 rtnl_lock();
1665
1666 /*
1667 * At this point, interface list manipulations are fine
1668 * because the driver cannot be handing us frames any
1669 * more and the tasklet is killed.
1670 */
1671 ieee80211_remove_interfaces(local);
1672
1673 ieee80211_txq_teardown_flows(local);
1674
1675 wiphy_lock(local->hw.wiphy);
1676 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1677 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1678 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1679 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1680 wiphy_unlock(local->hw.wiphy);
1681 rtnl_unlock();
1682
1683 cancel_work_sync(&local->restart_work);
1684
1685 ieee80211_clear_tx_pending(local);
1686 rate_control_deinitialize(local);
1687
1688 if (skb_queue_len(&local->skb_queue) ||
1689 skb_queue_len(&local->skb_queue_unreliable))
1690 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1691 skb_queue_purge(&local->skb_queue);
1692 skb_queue_purge(&local->skb_queue_unreliable);
1693
1694 wiphy_unregister(local->hw.wiphy);
1695 destroy_workqueue(local->workqueue);
1696 ieee80211_led_exit(local);
1697 kfree(local->int_scan_req);
1698 }
1699 EXPORT_SYMBOL(ieee80211_unregister_hw);
1700
ieee80211_free_ack_frame(int id,void * p,void * data)1701 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1702 {
1703 WARN_ONCE(1, "Have pending ack frames!\n");
1704 kfree_skb(p);
1705 return 0;
1706 }
1707
ieee80211_free_hw(struct ieee80211_hw * hw)1708 void ieee80211_free_hw(struct ieee80211_hw *hw)
1709 {
1710 struct ieee80211_local *local = hw_to_local(hw);
1711 enum nl80211_band band;
1712
1713 mutex_destroy(&local->iflist_mtx);
1714
1715 if (local->wiphy_ciphers_allocated) {
1716 kfree(local->hw.wiphy->cipher_suites);
1717 local->wiphy_ciphers_allocated = false;
1718 }
1719
1720 idr_for_each(&local->ack_status_frames,
1721 ieee80211_free_ack_frame, NULL);
1722 idr_destroy(&local->ack_status_frames);
1723
1724 sta_info_stop(local);
1725
1726 ieee80211_free_led_names(local);
1727
1728 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1729 if (!(local->sband_allocated & BIT(band)))
1730 continue;
1731 kfree(local->hw.wiphy->bands[band]);
1732 }
1733
1734 wiphy_free(local->hw.wiphy);
1735 }
1736 EXPORT_SYMBOL(ieee80211_free_hw);
1737
1738 static const char * const drop_reasons_monitor[] = {
1739 #define V(x) #x,
1740 [0] = "RX_DROP_MONITOR",
1741 MAC80211_DROP_REASONS_MONITOR(V)
1742 };
1743
1744 static struct drop_reason_list drop_reason_list_monitor = {
1745 .reasons = drop_reasons_monitor,
1746 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1747 };
1748
1749 static const char * const drop_reasons_unusable[] = {
1750 [0] = "RX_DROP_UNUSABLE",
1751 MAC80211_DROP_REASONS_UNUSABLE(V)
1752 #undef V
1753 };
1754
1755 static struct drop_reason_list drop_reason_list_unusable = {
1756 .reasons = drop_reasons_unusable,
1757 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1758 };
1759
ieee80211_init(void)1760 static int __init ieee80211_init(void)
1761 {
1762 struct sk_buff *skb;
1763 int ret;
1764
1765 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1766 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1767 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1768
1769 ret = rc80211_minstrel_init();
1770 if (ret)
1771 return ret;
1772
1773 ret = ieee80211_iface_init();
1774 if (ret)
1775 goto err_netdev;
1776
1777 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1778 &drop_reason_list_monitor);
1779 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1780 &drop_reason_list_unusable);
1781
1782 return 0;
1783 err_netdev:
1784 rc80211_minstrel_exit();
1785
1786 return ret;
1787 }
1788
ieee80211_exit(void)1789 static void __exit ieee80211_exit(void)
1790 {
1791 rc80211_minstrel_exit();
1792
1793 ieee80211s_stop();
1794
1795 ieee80211_iface_exit();
1796
1797 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1798 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1799
1800 rcu_barrier();
1801 }
1802
1803
1804 subsys_initcall(ieee80211_init);
1805 module_exit(ieee80211_exit);
1806
1807 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1808 MODULE_LICENSE("GPL");
1809