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
37void 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(v: &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(lock: &local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, mc_list: &local->mc_list);
75 spin_unlock_bh(lock: &local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, total_flags: &new_flags, multicast: mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85}
86
87static 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
96static 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(chandef1: &chandef, chandef2: 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 ||
152 !cfg80211_chandef_identical(chandef1: &local->hw.conf.chandef, chandef2: &chandef)) {
153 local->hw.conf.chandef = chandef;
154 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
155 }
156
157 if (!conf_is_ht(conf: &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: &chandef);
170
171 rcu_read_lock();
172 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
173 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
174 continue;
175 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
176 continue;
177 if (sdata->vif.bss_conf.txpower == INT_MIN)
178 continue;
179 power = min(power, sdata->vif.bss_conf.txpower);
180 }
181 rcu_read_unlock();
182
183 if (local->hw.conf.power_level != power) {
184 changed |= IEEE80211_CONF_CHANGE_POWER;
185 local->hw.conf.power_level = power;
186 }
187
188 return changed;
189}
190
191int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
192{
193 int ret = 0;
194
195 might_sleep();
196
197 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
198 IEEE80211_CONF_CHANGE_POWER |
199 IEEE80211_CONF_CHANGE_SMPS));
200
201 if (changed && local->open_count) {
202 ret = drv_config(local, changed);
203 /*
204 * Goal:
205 * HW reconfiguration should never fail, the driver has told
206 * us what it can support so it should live up to that promise.
207 *
208 * Current status:
209 * rfkill is not integrated with mac80211 and a
210 * configuration command can thus fail if hardware rfkill
211 * is enabled
212 *
213 * FIXME: integrate rfkill with mac80211 and then add this
214 * WARN_ON() back
215 *
216 */
217 /* WARN_ON(ret); */
218 }
219
220 return ret;
221}
222
223/* for scanning, offchannel and chanctx emulation only */
224static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
225 struct ieee80211_chanctx_conf *ctx)
226{
227 u32 changed;
228
229 if (!local->open_count)
230 return 0;
231
232 changed = ieee80211_calc_hw_conf_chan(local, ctx);
233 if (!changed)
234 return 0;
235
236 return drv_config(local, changed);
237}
238
239int ieee80211_hw_conf_chan(struct ieee80211_local *local)
240{
241 struct ieee80211_chanctx *ctx;
242
243 ctx = list_first_entry_or_null(&local->chanctx_list,
244 struct ieee80211_chanctx,
245 list);
246
247 return _ieee80211_hw_conf_chan(local, ctx: ctx ? &ctx->conf : NULL);
248}
249
250void ieee80211_hw_conf_init(struct ieee80211_local *local)
251{
252 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
253 IEEE80211_CONF_CHANGE_POWER |
254 IEEE80211_CONF_CHANGE_SMPS);
255
256 if (WARN_ON(!local->open_count))
257 return;
258
259 if (local->emulate_chanctx) {
260 struct ieee80211_chanctx *ctx;
261
262 ctx = list_first_entry_or_null(&local->chanctx_list,
263 struct ieee80211_chanctx,
264 list);
265
266 changed |= ieee80211_calc_hw_conf_chan(local,
267 ctx: ctx ? &ctx->conf : NULL);
268 }
269
270 WARN_ON(drv_config(local, changed));
271}
272
273int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
274 struct ieee80211_chanctx_conf *ctx)
275{
276 struct ieee80211_local *local = hw_to_local(hw);
277
278 local->hw.conf.radar_enabled = ctx->radar_enabled;
279
280 return _ieee80211_hw_conf_chan(local, ctx);
281}
282EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
283
284void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
285 struct ieee80211_chanctx_conf *ctx)
286{
287 struct ieee80211_local *local = hw_to_local(hw);
288
289 local->hw.conf.radar_enabled = false;
290
291 _ieee80211_hw_conf_chan(local, NULL);
292}
293EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
294
295void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
296 struct ieee80211_chanctx_conf *ctx,
297 u32 changed)
298{
299 struct ieee80211_local *local = hw_to_local(hw);
300
301 local->hw.conf.radar_enabled = ctx->radar_enabled;
302
303 _ieee80211_hw_conf_chan(local, ctx);
304}
305EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
306
307int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
308 struct ieee80211_vif_chanctx_switch *vifs,
309 int n_vifs,
310 enum ieee80211_chanctx_switch_mode mode)
311{
312 struct ieee80211_local *local = hw_to_local(hw);
313
314 if (n_vifs <= 0)
315 return -EINVAL;
316
317 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
318 _ieee80211_hw_conf_chan(local, ctx: vifs[0].new_ctx);
319
320 return 0;
321}
322EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
323
324#define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
325 BSS_CHANGED_IDLE |\
326 BSS_CHANGED_PS |\
327 BSS_CHANGED_IBSS |\
328 BSS_CHANGED_ARP_FILTER |\
329 BSS_CHANGED_SSID |\
330 BSS_CHANGED_MLD_VALID_LINKS |\
331 BSS_CHANGED_MLD_TTLM)
332
333void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
334 u64 changed)
335{
336 struct ieee80211_local *local = sdata->local;
337
338 might_sleep();
339
340 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
341 return;
342
343 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
344 BSS_CHANGED_BEACON_ENABLED) &&
345 sdata->vif.type != NL80211_IFTYPE_AP &&
346 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
347 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
348 sdata->vif.type != NL80211_IFTYPE_OCB))
349 return;
350
351 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
352 sdata->vif.type == NL80211_IFTYPE_NAN ||
353 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
354 !sdata->vif.bss_conf.mu_mimo_owner &&
355 !(changed & BSS_CHANGED_TXPOWER))))
356 return;
357
358 if (!check_sdata_in_driver(sdata))
359 return;
360
361 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
362 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
363
364 trace_drv_vif_cfg_changed(local, sdata, changed);
365 if (local->ops->vif_cfg_changed)
366 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
367 }
368
369 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
370 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
371
372 /* FIXME: should be for each link */
373 trace_drv_link_info_changed(local, sdata, link_conf: &sdata->vif.bss_conf,
374 changed);
375 if (local->ops->link_info_changed)
376 local->ops->link_info_changed(&local->hw, &sdata->vif,
377 &sdata->vif.bss_conf, ch);
378 }
379
380 if (local->ops->bss_info_changed)
381 local->ops->bss_info_changed(&local->hw, &sdata->vif,
382 &sdata->vif.bss_conf, changed);
383 trace_drv_return_void(local);
384}
385
386void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
387 u64 changed)
388{
389 struct ieee80211_local *local = sdata->local;
390
391 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
392
393 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
394 return;
395
396 drv_vif_cfg_changed(local, sdata, changed);
397}
398
399void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
400 struct ieee80211_link_data *link,
401 u64 changed)
402{
403 struct ieee80211_local *local = sdata->local;
404
405 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
406
407 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
408 return;
409
410 if (!check_sdata_in_driver(sdata))
411 return;
412
413 drv_link_info_changed(local, sdata, info: link->conf, link_id: link->link_id, changed);
414}
415
416u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
417{
418 sdata->vif.bss_conf.use_cts_prot = false;
419 sdata->vif.bss_conf.use_short_preamble = false;
420 sdata->vif.bss_conf.use_short_slot = false;
421 return BSS_CHANGED_ERP_CTS_PROT |
422 BSS_CHANGED_ERP_PREAMBLE |
423 BSS_CHANGED_ERP_SLOT;
424}
425
426static void ieee80211_tasklet_handler(struct tasklet_struct *t)
427{
428 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
429 struct sk_buff *skb;
430
431 while ((skb = skb_dequeue(list: &local->skb_queue)) ||
432 (skb = skb_dequeue(list: &local->skb_queue_unreliable))) {
433 switch (skb->pkt_type) {
434 case IEEE80211_RX_MSG:
435 /* Clear skb->pkt_type in order to not confuse kernel
436 * netstack. */
437 skb->pkt_type = 0;
438 ieee80211_rx(hw: &local->hw, skb);
439 break;
440 case IEEE80211_TX_STATUS_MSG:
441 skb->pkt_type = 0;
442 ieee80211_tx_status_skb(hw: &local->hw, skb);
443 break;
444 default:
445 WARN(1, "mac80211: Packet is of unknown type %d\n",
446 skb->pkt_type);
447 dev_kfree_skb(skb);
448 break;
449 }
450 }
451}
452
453static void ieee80211_restart_work(struct work_struct *work)
454{
455 struct ieee80211_local *local =
456 container_of(work, struct ieee80211_local, restart_work);
457 struct ieee80211_sub_if_data *sdata;
458 int ret;
459
460 flush_workqueue(local->workqueue);
461
462 rtnl_lock();
463 /* we might do interface manipulations, so need both */
464 wiphy_lock(wiphy: local->hw.wiphy);
465 wiphy_work_flush(wiphy: local->hw.wiphy, NULL);
466
467 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
468 "%s called with hardware scan in progress\n", __func__);
469
470 list_for_each_entry(sdata, &local->interfaces, list) {
471 /*
472 * XXX: there may be more work for other vif types and even
473 * for station mode: a good thing would be to run most of
474 * the iface type's dependent _stop (ieee80211_mg_stop,
475 * ieee80211_ibss_stop) etc...
476 * For now, fix only the specific bug that was seen: race
477 * between csa_connection_drop_work and us.
478 */
479 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
480 /*
481 * This worker is scheduled from the iface worker that
482 * runs on mac80211's workqueue, so we can't be
483 * scheduling this worker after the cancel right here.
484 * The exception is ieee80211_chswitch_done.
485 * Then we can have a race...
486 */
487 wiphy_work_cancel(wiphy: local->hw.wiphy,
488 work: &sdata->u.mgd.csa_connection_drop_work);
489 if (sdata->vif.bss_conf.csa_active)
490 ieee80211_sta_connection_lost(sdata,
491 reason: WLAN_REASON_UNSPECIFIED,
492 tx: false);
493 }
494 wiphy_delayed_work_flush(wiphy: local->hw.wiphy,
495 dwork: &sdata->dec_tailroom_needed_wk);
496 }
497 ieee80211_scan_cancel(local);
498
499 /* make sure any new ROC will consider local->in_reconfig */
500 wiphy_delayed_work_flush(wiphy: local->hw.wiphy, dwork: &local->roc_work);
501 wiphy_work_flush(wiphy: local->hw.wiphy, work: &local->hw_roc_done);
502
503 /* wait for all packet processing to be done */
504 synchronize_net();
505
506 ret = ieee80211_reconfig(local);
507 wiphy_unlock(wiphy: local->hw.wiphy);
508
509 if (ret)
510 cfg80211_shutdown_all_interfaces(wiphy: local->hw.wiphy);
511
512 rtnl_unlock();
513}
514
515void ieee80211_restart_hw(struct ieee80211_hw *hw)
516{
517 struct ieee80211_local *local = hw_to_local(hw);
518
519 trace_api_restart_hw(local);
520
521 wiphy_info(hw->wiphy,
522 "Hardware restart was requested\n");
523
524 /* use this reason, ieee80211_reconfig will unblock it */
525 ieee80211_stop_queues_by_reason(hw, queues: IEEE80211_MAX_QUEUE_MAP,
526 reason: IEEE80211_QUEUE_STOP_REASON_SUSPEND,
527 refcounted: false);
528
529 /*
530 * Stop all Rx during the reconfig. We don't want state changes
531 * or driver callbacks while this is in progress.
532 */
533 local->in_reconfig = true;
534 barrier();
535
536 queue_work(wq: system_freezable_wq, work: &local->restart_work);
537}
538EXPORT_SYMBOL(ieee80211_restart_hw);
539
540#ifdef CONFIG_INET
541static int ieee80211_ifa_changed(struct notifier_block *nb,
542 unsigned long data, void *arg)
543{
544 struct in_ifaddr *ifa = arg;
545 struct ieee80211_local *local =
546 container_of(nb, struct ieee80211_local,
547 ifa_notifier);
548 struct net_device *ndev = ifa->ifa_dev->dev;
549 struct wireless_dev *wdev = ndev->ieee80211_ptr;
550 struct in_device *idev;
551 struct ieee80211_sub_if_data *sdata;
552 struct ieee80211_vif_cfg *vif_cfg;
553 struct ieee80211_if_managed *ifmgd;
554 int c = 0;
555
556 /* Make sure it's our interface that got changed */
557 if (!wdev)
558 return NOTIFY_DONE;
559
560 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
561 return NOTIFY_DONE;
562
563 sdata = IEEE80211_DEV_TO_SUB_IF(dev: ndev);
564 vif_cfg = &sdata->vif.cfg;
565
566 /* ARP filtering is only supported in managed mode */
567 if (sdata->vif.type != NL80211_IFTYPE_STATION)
568 return NOTIFY_DONE;
569
570 idev = __in_dev_get_rtnl(dev: sdata->dev);
571 if (!idev)
572 return NOTIFY_DONE;
573
574 ifmgd = &sdata->u.mgd;
575
576 /*
577 * The nested here is needed to convince lockdep that this is
578 * all OK. Yes, we lock the wiphy mutex here while we already
579 * hold the notifier rwsem, that's the normal case. And yes,
580 * we also acquire the notifier rwsem again when unregistering
581 * a netdev while we already hold the wiphy mutex, so it does
582 * look like a typical ABBA deadlock.
583 *
584 * However, both of these things happen with the RTNL held
585 * already. Therefore, they can't actually happen, since the
586 * lock orders really are ABC and ACB, which is fine due to
587 * the RTNL (A).
588 *
589 * We still need to prevent recursion, which is accomplished
590 * by the !wdev->registered check above.
591 */
592 mutex_lock_nested(lock: &local->hw.wiphy->mtx, subclass: 1);
593 __acquire(&local->hw.wiphy->mtx);
594
595 /* Copy the addresses to the vif config list */
596 ifa = rtnl_dereference(idev->ifa_list);
597 while (ifa) {
598 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
599 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
600 ifa = rtnl_dereference(ifa->ifa_next);
601 c++;
602 }
603
604 vif_cfg->arp_addr_cnt = c;
605
606 /* Configure driver only if associated (which also implies it is up) */
607 if (ifmgd->associated)
608 ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_ARP_FILTER);
609
610 wiphy_unlock(wiphy: local->hw.wiphy);
611
612 return NOTIFY_OK;
613}
614#endif
615
616#if IS_ENABLED(CONFIG_IPV6)
617static int ieee80211_ifa6_changed(struct notifier_block *nb,
618 unsigned long data, void *arg)
619{
620 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
621 struct inet6_dev *idev = ifa->idev;
622 struct net_device *ndev = ifa->idev->dev;
623 struct ieee80211_local *local =
624 container_of(nb, struct ieee80211_local, ifa6_notifier);
625 struct wireless_dev *wdev = ndev->ieee80211_ptr;
626 struct ieee80211_sub_if_data *sdata;
627
628 /* Make sure it's our interface that got changed */
629 if (!wdev || wdev->wiphy != local->hw.wiphy)
630 return NOTIFY_DONE;
631
632 sdata = IEEE80211_DEV_TO_SUB_IF(dev: ndev);
633
634 /*
635 * For now only support station mode. This is mostly because
636 * doing AP would have to handle AP_VLAN in some way ...
637 */
638 if (sdata->vif.type != NL80211_IFTYPE_STATION)
639 return NOTIFY_DONE;
640
641 drv_ipv6_addr_change(local, sdata, idev);
642
643 return NOTIFY_OK;
644}
645#endif
646
647/* There isn't a lot of sense in it, but you can transmit anything you like */
648static const struct ieee80211_txrx_stypes
649ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
650 [NL80211_IFTYPE_ADHOC] = {
651 .tx = 0xffff,
652 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
653 BIT(IEEE80211_STYPE_AUTH >> 4) |
654 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
655 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
656 },
657 [NL80211_IFTYPE_STATION] = {
658 .tx = 0xffff,
659 /*
660 * To support Pre Association Security Negotiation (PASN) while
661 * already associated to one AP, allow user space to register to
662 * Rx authentication frames, so that the user space logic would
663 * be able to receive/handle authentication frames from a
664 * different AP as part of PASN.
665 * It is expected that user space would intelligently register
666 * for Rx authentication frames, i.e., only when PASN is used
667 * and configure a match filter only for PASN authentication
668 * algorithm, as otherwise the MLME functionality of mac80211
669 * would be broken.
670 */
671 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
672 BIT(IEEE80211_STYPE_AUTH >> 4) |
673 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
674 },
675 [NL80211_IFTYPE_AP] = {
676 .tx = 0xffff,
677 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
678 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
679 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
680 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
681 BIT(IEEE80211_STYPE_AUTH >> 4) |
682 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
683 BIT(IEEE80211_STYPE_ACTION >> 4),
684 },
685 [NL80211_IFTYPE_AP_VLAN] = {
686 /* copy AP */
687 .tx = 0xffff,
688 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
689 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
690 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
691 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
692 BIT(IEEE80211_STYPE_AUTH >> 4) |
693 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
694 BIT(IEEE80211_STYPE_ACTION >> 4),
695 },
696 [NL80211_IFTYPE_P2P_CLIENT] = {
697 .tx = 0xffff,
698 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
699 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
700 },
701 [NL80211_IFTYPE_P2P_GO] = {
702 .tx = 0xffff,
703 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
704 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
705 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
706 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
707 BIT(IEEE80211_STYPE_AUTH >> 4) |
708 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
709 BIT(IEEE80211_STYPE_ACTION >> 4),
710 },
711 [NL80211_IFTYPE_MESH_POINT] = {
712 .tx = 0xffff,
713 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
714 BIT(IEEE80211_STYPE_AUTH >> 4) |
715 BIT(IEEE80211_STYPE_DEAUTH >> 4),
716 },
717 [NL80211_IFTYPE_P2P_DEVICE] = {
718 .tx = 0xffff,
719 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
720 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
721 },
722};
723
724static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
725 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
726 IEEE80211_HT_AMPDU_PARM_DENSITY,
727
728 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
729 IEEE80211_HT_CAP_MAX_AMSDU |
730 IEEE80211_HT_CAP_SGI_20 |
731 IEEE80211_HT_CAP_SGI_40 |
732 IEEE80211_HT_CAP_TX_STBC |
733 IEEE80211_HT_CAP_RX_STBC |
734 IEEE80211_HT_CAP_LDPC_CODING |
735 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
736 .mcs = {
737 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
738 0xff, 0xff, 0xff, 0xff, 0xff, },
739 },
740};
741
742static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
743 .vht_cap_info =
744 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
745 IEEE80211_VHT_CAP_SHORT_GI_80 |
746 IEEE80211_VHT_CAP_SHORT_GI_160 |
747 IEEE80211_VHT_CAP_RXSTBC_MASK |
748 IEEE80211_VHT_CAP_TXSTBC |
749 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
750 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
751 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
752 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
753 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
754 .supp_mcs = {
755 .rx_mcs_map = cpu_to_le16(~0),
756 .tx_mcs_map = cpu_to_le16(~0),
757 },
758};
759
760struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
761 const struct ieee80211_ops *ops,
762 const char *requested_name)
763{
764 struct ieee80211_local *local;
765 int priv_size, i;
766 struct wiphy *wiphy;
767 bool emulate_chanctx;
768
769 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
770 !ops->add_interface || !ops->remove_interface ||
771 !ops->configure_filter || !ops->wake_tx_queue))
772 return NULL;
773
774 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
775 return NULL;
776
777 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
778 (ops->link_info_changed && ops->bss_info_changed)))
779 return NULL;
780
781 /* check all or no channel context operations exist */
782 if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
783 ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
784 ops->change_chanctx == ieee80211_emulate_change_chanctx) {
785 if (WARN_ON(ops->assign_vif_chanctx ||
786 ops->unassign_vif_chanctx))
787 return NULL;
788 emulate_chanctx = true;
789 } else {
790 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
791 ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
792 ops->change_chanctx == ieee80211_emulate_change_chanctx))
793 return NULL;
794 if (WARN_ON(!ops->add_chanctx ||
795 !ops->remove_chanctx ||
796 !ops->change_chanctx ||
797 !ops->assign_vif_chanctx ||
798 !ops->unassign_vif_chanctx))
799 return NULL;
800 emulate_chanctx = false;
801 }
802
803 /* Ensure 32-byte alignment of our private data and hw private data.
804 * We use the wiphy priv data for both our ieee80211_local and for
805 * the driver's private data
806 *
807 * In memory it'll be like this:
808 *
809 * +-------------------------+
810 * | struct wiphy |
811 * +-------------------------+
812 * | struct ieee80211_local |
813 * +-------------------------+
814 * | driver's private data |
815 * +-------------------------+
816 *
817 */
818 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
819
820 wiphy = wiphy_new_nm(ops: &mac80211_config_ops, sizeof_priv: priv_size, requested_name);
821
822 if (!wiphy)
823 return NULL;
824
825 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
826
827 wiphy->privid = mac80211_wiphy_privid;
828
829 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
830 WIPHY_FLAG_4ADDR_AP |
831 WIPHY_FLAG_4ADDR_STATION |
832 WIPHY_FLAG_REPORTS_OBSS |
833 WIPHY_FLAG_OFFCHAN_TX;
834
835 if (emulate_chanctx || ops->remain_on_channel)
836 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
837
838 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
839 NL80211_FEATURE_SAE |
840 NL80211_FEATURE_HT_IBSS |
841 NL80211_FEATURE_VIF_TXPOWER |
842 NL80211_FEATURE_MAC_ON_CREATE |
843 NL80211_FEATURE_USERSPACE_MPM |
844 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
845 wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_FILS_STA);
846 wiphy_ext_feature_set(wiphy,
847 ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
848 wiphy_ext_feature_set(wiphy,
849 ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
850 wiphy_ext_feature_set(wiphy,
851 ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
852 wiphy_ext_feature_set(wiphy,
853 ftidx: NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
854 wiphy_ext_feature_set(wiphy,
855 ftidx: NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
856
857 if (!ops->hw_scan) {
858 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
859 NL80211_FEATURE_AP_SCAN;
860 /*
861 * if the driver behaves correctly using the probe request
862 * (template) from mac80211, then both of these should be
863 * supported even with hw scan - but let drivers opt in.
864 */
865 wiphy_ext_feature_set(wiphy,
866 ftidx: NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
867 wiphy_ext_feature_set(wiphy,
868 ftidx: NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
869 }
870
871 if (!ops->set_key) {
872 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
873 wiphy_ext_feature_set(wiphy,
874 ftidx: NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
875 }
876
877 wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_TXQS);
878 wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_RRM);
879
880 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
881
882 local = wiphy_priv(wiphy);
883
884 if (sta_info_init(local))
885 goto err_free;
886
887 local->hw.wiphy = wiphy;
888
889 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
890
891 local->ops = ops;
892 local->emulate_chanctx = emulate_chanctx;
893
894 if (emulate_chanctx)
895 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
896
897 /*
898 * We need a bit of data queued to build aggregates properly, so
899 * instruct the TCP stack to allow more than a single ms of data
900 * to be queued in the stack. The value is a bit-shift of 1
901 * second, so 7 is ~8ms of queued data. Only affects local TCP
902 * sockets.
903 * This is the default, anyhow - drivers may need to override it
904 * for local reasons (longer buffers, longer completion time, or
905 * similar).
906 */
907 local->hw.tx_sk_pacing_shift = 7;
908
909 /* set up some defaults */
910 local->hw.queues = 1;
911 local->hw.max_rates = 1;
912 local->hw.max_report_rates = 0;
913 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
914 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
915 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
916 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
917 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
918 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
919 IEEE80211_RADIOTAP_MCS_HAVE_GI |
920 IEEE80211_RADIOTAP_MCS_HAVE_BW;
921 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
922 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
923 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
924 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
925 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
926 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
927 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
928 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
929
930 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
931
932 wiphy->extended_capabilities = local->ext_capa;
933 wiphy->extended_capabilities_mask = local->ext_capa;
934 wiphy->extended_capabilities_len =
935 ARRAY_SIZE(local->ext_capa);
936
937 INIT_LIST_HEAD(list: &local->interfaces);
938 INIT_LIST_HEAD(list: &local->mon_list);
939
940 __hw_addr_init(list: &local->mc_list);
941
942 mutex_init(&local->iflist_mtx);
943 spin_lock_init(&local->filter_lock);
944 spin_lock_init(&local->rx_path_lock);
945 spin_lock_init(&local->queue_stop_reason_lock);
946
947 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
948 INIT_LIST_HEAD(list: &local->active_txqs[i]);
949 spin_lock_init(&local->active_txq_lock[i]);
950 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
951 local->aql_txq_limit_high[i] =
952 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
953 atomic_set(v: &local->aql_ac_pending_airtime[i], i: 0);
954 }
955
956 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
957 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
958 atomic_set(v: &local->aql_total_pending_airtime, i: 0);
959
960 spin_lock_init(&local->handle_wake_tx_queue_lock);
961
962 INIT_LIST_HEAD(list: &local->chanctx_list);
963
964 wiphy_delayed_work_init(dwork: &local->scan_work, func: ieee80211_scan_work);
965
966 INIT_WORK(&local->restart_work, ieee80211_restart_work);
967
968 wiphy_work_init(work: &local->radar_detected_work,
969 func: ieee80211_dfs_radar_detected_work);
970
971 wiphy_work_init(work: &local->reconfig_filter, func: ieee80211_reconfig_filter);
972
973 wiphy_work_init(work: &local->dynamic_ps_enable_work,
974 func: ieee80211_dynamic_ps_enable_work);
975 wiphy_work_init(work: &local->dynamic_ps_disable_work,
976 func: ieee80211_dynamic_ps_disable_work);
977 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
978
979 wiphy_work_init(work: &local->sched_scan_stopped_work,
980 func: ieee80211_sched_scan_stopped_work);
981
982 spin_lock_init(&local->ack_status_lock);
983 idr_init(idr: &local->ack_status_frames);
984
985 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
986 skb_queue_head_init(list: &local->pending[i]);
987 atomic_set(v: &local->agg_queue_stop[i], i: 0);
988 }
989 tasklet_setup(t: &local->tx_pending_tasklet, callback: ieee80211_tx_pending);
990 tasklet_setup(t: &local->wake_txqs_tasklet, callback: ieee80211_wake_txqs);
991 tasklet_setup(t: &local->tasklet, callback: ieee80211_tasklet_handler);
992
993 skb_queue_head_init(list: &local->skb_queue);
994 skb_queue_head_init(list: &local->skb_queue_unreliable);
995
996 ieee80211_alloc_led_names(local);
997
998 ieee80211_roc_setup(local);
999
1000 local->hw.radiotap_timestamp.units_pos = -1;
1001 local->hw.radiotap_timestamp.accuracy = -1;
1002
1003 return &local->hw;
1004 err_free:
1005 wiphy_free(wiphy);
1006 return NULL;
1007}
1008EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1009
1010static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1011{
1012 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
1013 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1014 int r = 0, w = 0;
1015 u32 *suites;
1016 static const u32 cipher_suites[] = {
1017 /* keep WEP first, it may be removed below */
1018 WLAN_CIPHER_SUITE_WEP40,
1019 WLAN_CIPHER_SUITE_WEP104,
1020 WLAN_CIPHER_SUITE_TKIP,
1021 WLAN_CIPHER_SUITE_CCMP,
1022 WLAN_CIPHER_SUITE_CCMP_256,
1023 WLAN_CIPHER_SUITE_GCMP,
1024 WLAN_CIPHER_SUITE_GCMP_256,
1025
1026 /* keep last -- depends on hw flags! */
1027 WLAN_CIPHER_SUITE_AES_CMAC,
1028 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1029 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1030 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1031 };
1032
1033 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
1034 local->hw.wiphy->cipher_suites) {
1035 /* If the driver advertises, or doesn't support SW crypto,
1036 * we only need to remove WEP if necessary.
1037 */
1038 if (have_wep)
1039 return 0;
1040
1041 /* well if it has _no_ ciphers ... fine */
1042 if (!local->hw.wiphy->n_cipher_suites)
1043 return 0;
1044
1045 /* Driver provides cipher suites, but we need to exclude WEP */
1046 suites = kmemdup(p: local->hw.wiphy->cipher_suites,
1047 size: sizeof(u32) * local->hw.wiphy->n_cipher_suites,
1048 GFP_KERNEL);
1049 if (!suites)
1050 return -ENOMEM;
1051
1052 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
1053 u32 suite = local->hw.wiphy->cipher_suites[r];
1054
1055 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
1056 suite == WLAN_CIPHER_SUITE_WEP104)
1057 continue;
1058 suites[w++] = suite;
1059 }
1060 } else {
1061 /* assign the (software supported and perhaps offloaded)
1062 * cipher suites
1063 */
1064 local->hw.wiphy->cipher_suites = cipher_suites;
1065 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1066
1067 if (!have_mfp)
1068 local->hw.wiphy->n_cipher_suites -= 4;
1069
1070 if (!have_wep) {
1071 local->hw.wiphy->cipher_suites += 2;
1072 local->hw.wiphy->n_cipher_suites -= 2;
1073 }
1074
1075 /* not dynamically allocated, so just return */
1076 return 0;
1077 }
1078
1079 local->hw.wiphy->cipher_suites = suites;
1080 local->hw.wiphy->n_cipher_suites = w;
1081 local->wiphy_ciphers_allocated = true;
1082
1083 return 0;
1084}
1085
1086int ieee80211_register_hw(struct ieee80211_hw *hw)
1087{
1088 struct ieee80211_local *local = hw_to_local(hw);
1089 int result, i;
1090 enum nl80211_band band;
1091 int channels, max_bitrates;
1092 bool supp_ht, supp_vht, supp_he, supp_eht;
1093 struct cfg80211_chan_def dflt_chandef = {};
1094
1095 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1096 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1097 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1098 return -EINVAL;
1099
1100 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1101 (!local->ops->tdls_channel_switch ||
1102 !local->ops->tdls_cancel_channel_switch ||
1103 !local->ops->tdls_recv_channel_switch))
1104 return -EOPNOTSUPP;
1105
1106 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1107 !local->ops->set_frag_threshold))
1108 return -EINVAL;
1109
1110 if (WARN_ON(local->hw.wiphy->interface_modes &
1111 BIT(NL80211_IFTYPE_NAN) &&
1112 (!local->ops->start_nan || !local->ops->stop_nan)))
1113 return -EINVAL;
1114
1115 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1116 /*
1117 * For drivers capable of doing MLO, assume modern driver
1118 * or firmware facilities, so software doesn't have to do
1119 * as much, e.g. monitoring beacons would be hard if we
1120 * might not even know which link is active at which time.
1121 */
1122 if (WARN_ON(local->emulate_chanctx))
1123 return -EINVAL;
1124
1125 if (WARN_ON(!local->ops->link_info_changed))
1126 return -EINVAL;
1127
1128 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1129 return -EINVAL;
1130
1131 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1132 return -EINVAL;
1133
1134 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1135 return -EINVAL;
1136
1137 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1138 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1139 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1140 return -EINVAL;
1141
1142 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1143 return -EINVAL;
1144
1145 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1146 return -EINVAL;
1147
1148 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1149 return -EINVAL;
1150
1151 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1152 return -EINVAL;
1153
1154 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1155 return -EINVAL;
1156
1157 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1158 return -EINVAL;
1159 }
1160
1161#ifdef CONFIG_PM
1162 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1163 return -EINVAL;
1164#endif
1165
1166 if (local->emulate_chanctx) {
1167 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1168 const struct ieee80211_iface_combination *comb;
1169
1170 comb = &local->hw.wiphy->iface_combinations[i];
1171
1172 if (comb->num_different_channels > 1)
1173 return -EINVAL;
1174 }
1175 } else {
1176 /* DFS is not supported with multi-channel combinations yet */
1177 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1178 const struct ieee80211_iface_combination *comb;
1179
1180 comb = &local->hw.wiphy->iface_combinations[i];
1181
1182 if (comb->radar_detect_widths &&
1183 comb->num_different_channels > 1)
1184 return -EINVAL;
1185 }
1186 }
1187
1188 /* Only HW csum features are currently compatible with mac80211 */
1189 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1190 return -EINVAL;
1191
1192 if (hw->max_report_rates == 0)
1193 hw->max_report_rates = hw->max_rates;
1194
1195 local->rx_chains = 1;
1196
1197 /*
1198 * generic code guarantees at least one band,
1199 * set this very early because much code assumes
1200 * that hw.conf.channel is assigned
1201 */
1202 channels = 0;
1203 max_bitrates = 0;
1204 supp_ht = false;
1205 supp_vht = false;
1206 supp_he = false;
1207 supp_eht = false;
1208 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1209 const struct ieee80211_sband_iftype_data *iftd;
1210 struct ieee80211_supported_band *sband;
1211
1212 sband = local->hw.wiphy->bands[band];
1213 if (!sband)
1214 continue;
1215
1216 if (!dflt_chandef.chan) {
1217 /*
1218 * Assign the first enabled channel to dflt_chandef
1219 * from the list of channels
1220 */
1221 for (i = 0; i < sband->n_channels; i++)
1222 if (!(sband->channels[i].flags &
1223 IEEE80211_CHAN_DISABLED))
1224 break;
1225 /* if none found then use the first anyway */
1226 if (i == sband->n_channels)
1227 i = 0;
1228 cfg80211_chandef_create(chandef: &dflt_chandef,
1229 channel: &sband->channels[i],
1230 chantype: NL80211_CHAN_NO_HT);
1231 /* init channel we're on */
1232 local->monitor_chanreq.oper = dflt_chandef;
1233 if (local->emulate_chanctx) {
1234 local->dflt_chandef = dflt_chandef;
1235 local->hw.conf.chandef = dflt_chandef;
1236 }
1237 }
1238
1239 channels += sband->n_channels;
1240
1241 /*
1242 * Due to the way the aggregation code handles this and it
1243 * being an HT capability, we can't really support delayed
1244 * BA in MLO (yet).
1245 */
1246 if (WARN_ON(sband->ht_cap.ht_supported &&
1247 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1248 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1249 return -EINVAL;
1250
1251 if (max_bitrates < sband->n_bitrates)
1252 max_bitrates = sband->n_bitrates;
1253 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1254 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1255
1256 for_each_sband_iftype_data(sband, i, iftd) {
1257 u8 he_40_mhz_cap;
1258
1259 supp_he = supp_he || iftd->he_cap.has_he;
1260 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1261
1262 if (band == NL80211_BAND_2GHZ)
1263 he_40_mhz_cap =
1264 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1265 else
1266 he_40_mhz_cap =
1267 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1268
1269 /* currently no support for HE client where HT has 40 MHz but not HT */
1270 if (iftd->he_cap.has_he &&
1271 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1272 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1273 sband->ht_cap.ht_supported &&
1274 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1275 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1276 return -EINVAL;
1277 }
1278
1279 /* HT, VHT, HE require QoS, thus >= 4 queues */
1280 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1281 (supp_ht || supp_vht || supp_he)))
1282 return -EINVAL;
1283
1284 /* EHT requires HE support */
1285 if (WARN_ON(supp_eht && !supp_he))
1286 return -EINVAL;
1287
1288 if (!sband->ht_cap.ht_supported)
1289 continue;
1290
1291 /* TODO: consider VHT for RX chains, hopefully it's the same */
1292 local->rx_chains =
1293 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1294 local->rx_chains);
1295
1296 /* no need to mask, SM_PS_DISABLED has all bits set */
1297 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1298 IEEE80211_HT_CAP_SM_PS_SHIFT;
1299 }
1300
1301 /* if low-level driver supports AP, we also support VLAN.
1302 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1303 * based on their support to transmit SW encrypted packets.
1304 */
1305 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1306 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1307 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1308 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1309 }
1310
1311 /* mac80211 always supports monitor */
1312 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1313 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1314
1315 /* mac80211 doesn't support more than one IBSS interface right now */
1316 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1317 const struct ieee80211_iface_combination *c;
1318 int j;
1319
1320 c = &hw->wiphy->iface_combinations[i];
1321
1322 for (j = 0; j < c->n_limits; j++)
1323 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1324 c->limits[j].max > 1)
1325 return -EINVAL;
1326 }
1327
1328 local->int_scan_req = kzalloc(size: sizeof(*local->int_scan_req) +
1329 sizeof(void *) * channels, GFP_KERNEL);
1330 if (!local->int_scan_req)
1331 return -ENOMEM;
1332
1333 eth_broadcast_addr(addr: local->int_scan_req->bssid);
1334
1335 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1336 if (!local->hw.wiphy->bands[band])
1337 continue;
1338 local->int_scan_req->rates[band] = (u32) -1;
1339 }
1340
1341#ifndef CONFIG_MAC80211_MESH
1342 /* mesh depends on Kconfig, but drivers should set it if they want */
1343 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1344#endif
1345
1346 /* if the underlying driver supports mesh, mac80211 will (at least)
1347 * provide routing of mesh authentication frames to userspace */
1348 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1349 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1350
1351 /* mac80211 supports control port protocol changing */
1352 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1353
1354 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1355 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1356 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1357 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1358 if (hw->max_signal <= 0) {
1359 result = -EINVAL;
1360 goto fail_workqueue;
1361 }
1362 }
1363
1364 /* Mac80211 and therefore all drivers using SW crypto only
1365 * are able to handle PTK rekeys and Extended Key ID.
1366 */
1367 if (!local->ops->set_key) {
1368 wiphy_ext_feature_set(wiphy: local->hw.wiphy,
1369 ftidx: NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1370 wiphy_ext_feature_set(wiphy: local->hw.wiphy,
1371 ftidx: NL80211_EXT_FEATURE_EXT_KEY_ID);
1372 }
1373
1374 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1375 wiphy_ext_feature_set(wiphy: local->hw.wiphy,
1376 ftidx: NL80211_EXT_FEATURE_DEL_IBSS_STA);
1377
1378 /*
1379 * Calculate scan IE length -- we need this to alloc
1380 * memory and to subtract from the driver limit. It
1381 * includes the DS Params, (extended) supported rates, and HT
1382 * information -- SSID is the driver's responsibility.
1383 */
1384 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1385 3 /* DS Params */;
1386 if (supp_ht)
1387 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1388
1389 if (supp_vht)
1390 local->scan_ies_len +=
1391 2 + sizeof(struct ieee80211_vht_cap);
1392
1393 /*
1394 * HE cap element is variable in size - set len to allow max size */
1395 if (supp_he) {
1396 local->scan_ies_len +=
1397 3 + sizeof(struct ieee80211_he_cap_elem) +
1398 sizeof(struct ieee80211_he_mcs_nss_supp) +
1399 IEEE80211_HE_PPE_THRES_MAX_LEN;
1400
1401 if (supp_eht)
1402 local->scan_ies_len +=
1403 3 + sizeof(struct ieee80211_eht_cap_elem) +
1404 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1405 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1406 }
1407
1408 if (!local->ops->hw_scan) {
1409 /* For hw_scan, driver needs to set these up. */
1410 local->hw.wiphy->max_scan_ssids = 4;
1411 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1412 }
1413
1414 /*
1415 * If the driver supports any scan IEs, then assume the
1416 * limit includes the IEs mac80211 will add, otherwise
1417 * leave it at zero and let the driver sort it out; we
1418 * still pass our IEs to the driver but userspace will
1419 * not be allowed to in that case.
1420 */
1421 if (local->hw.wiphy->max_scan_ie_len)
1422 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1423
1424 result = ieee80211_init_cipher_suites(local);
1425 if (result < 0)
1426 goto fail_workqueue;
1427
1428 if (!local->ops->remain_on_channel)
1429 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1430
1431 /* mac80211 based drivers don't support internal TDLS setup */
1432 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1433 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1434
1435 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1436 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1437 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1438
1439 /* mac80211 supports multi BSSID, if the driver supports it */
1440 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1441 local->hw.wiphy->support_mbssid = true;
1442 if (ieee80211_hw_check(&local->hw,
1443 SUPPORTS_ONLY_HE_MULTI_BSSID))
1444 local->hw.wiphy->support_only_he_mbssid = true;
1445 else
1446 local->ext_capa[2] |=
1447 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1448 }
1449
1450 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1451
1452 /*
1453 * We use the number of queues for feature tests (QoS, HT) internally
1454 * so restrict them appropriately.
1455 */
1456 if (hw->queues > IEEE80211_MAX_QUEUES)
1457 hw->queues = IEEE80211_MAX_QUEUES;
1458
1459 local->workqueue =
1460 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1461 if (!local->workqueue) {
1462 result = -ENOMEM;
1463 goto fail_workqueue;
1464 }
1465
1466 /*
1467 * The hardware needs headroom for sending the frame,
1468 * and we need some headroom for passing the frame to monitor
1469 * interfaces, but never both at the same time.
1470 */
1471 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1472 IEEE80211_TX_STATUS_HEADROOM);
1473
1474 /*
1475 * if the driver doesn't specify a max listen interval we
1476 * use 5 which should be a safe default
1477 */
1478 if (local->hw.max_listen_interval == 0)
1479 local->hw.max_listen_interval = 5;
1480
1481 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1482
1483 local->dynamic_ps_forced_timeout = -1;
1484
1485 if (!local->hw.max_nan_de_entries)
1486 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1487
1488 if (!local->hw.weight_multiplier)
1489 local->hw.weight_multiplier = 1;
1490
1491 ieee80211_wep_init(local);
1492
1493 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1494
1495 ieee80211_led_init(local);
1496
1497 result = ieee80211_txq_setup_flows(local);
1498 if (result)
1499 goto fail_flows;
1500
1501 rtnl_lock();
1502 result = ieee80211_init_rate_ctrl_alg(local,
1503 name: hw->rate_control_algorithm);
1504 rtnl_unlock();
1505 if (result < 0) {
1506 wiphy_debug(local->hw.wiphy,
1507 "Failed to initialize rate control algorithm\n");
1508 goto fail_rate;
1509 }
1510
1511 if (local->rate_ctrl) {
1512 clear_bit(nr: IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, addr: hw->flags);
1513 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1514 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1515 }
1516
1517 /*
1518 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1519 * or have it when we don't, copy the sband structure and set/clear it.
1520 * This is necessary because rate scaling algorithms could be switched
1521 * and have different support values.
1522 * Print a message so that in the common case the reallocation can be
1523 * avoided.
1524 */
1525 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1526 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1527 struct ieee80211_supported_band *sband;
1528 bool local_cap, ie_cap;
1529
1530 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1531
1532 sband = local->hw.wiphy->bands[band];
1533 if (!sband || !sband->vht_cap.vht_supported)
1534 continue;
1535
1536 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1537 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1538
1539 if (local_cap == ie_cap)
1540 continue;
1541
1542 sband = kmemdup(p: sband, size: sizeof(*sband), GFP_KERNEL);
1543 if (!sband) {
1544 result = -ENOMEM;
1545 goto fail_rate;
1546 }
1547
1548 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1549 band);
1550
1551 sband->vht_cap.vht_mcs.tx_highest ^=
1552 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1553
1554 local->hw.wiphy->bands[band] = sband;
1555 local->sband_allocated |= BIT(band);
1556 }
1557
1558 result = wiphy_register(wiphy: local->hw.wiphy);
1559 if (result < 0)
1560 goto fail_wiphy_register;
1561
1562 debugfs_hw_add(local);
1563 rate_control_add_debugfs(local);
1564
1565 ieee80211_check_wbrf_support(local);
1566
1567 rtnl_lock();
1568 wiphy_lock(wiphy: hw->wiphy);
1569
1570 /* add one default STA interface if supported */
1571 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1572 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1573 struct vif_params params = {0};
1574
1575 result = ieee80211_if_add(local, name: "wlan%d", NET_NAME_ENUM, NULL,
1576 type: NL80211_IFTYPE_STATION, params: &params);
1577 if (result)
1578 wiphy_warn(local->hw.wiphy,
1579 "Failed to add default virtual iface\n");
1580 }
1581
1582 wiphy_unlock(wiphy: hw->wiphy);
1583 rtnl_unlock();
1584
1585#ifdef CONFIG_INET
1586 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1587 result = register_inetaddr_notifier(nb: &local->ifa_notifier);
1588 if (result)
1589 goto fail_ifa;
1590#endif
1591
1592#if IS_ENABLED(CONFIG_IPV6)
1593 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1594 result = register_inet6addr_notifier(nb: &local->ifa6_notifier);
1595 if (result)
1596 goto fail_ifa6;
1597#endif
1598
1599 return 0;
1600
1601#if IS_ENABLED(CONFIG_IPV6)
1602 fail_ifa6:
1603#ifdef CONFIG_INET
1604 unregister_inetaddr_notifier(nb: &local->ifa_notifier);
1605#endif
1606#endif
1607#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1608 fail_ifa:
1609#endif
1610 wiphy_unregister(wiphy: local->hw.wiphy);
1611 fail_wiphy_register:
1612 rtnl_lock();
1613 rate_control_deinitialize(local);
1614 ieee80211_remove_interfaces(local);
1615 rtnl_unlock();
1616 fail_rate:
1617 ieee80211_txq_teardown_flows(local);
1618 fail_flows:
1619 ieee80211_led_exit(local);
1620 destroy_workqueue(wq: local->workqueue);
1621 fail_workqueue:
1622 if (local->wiphy_ciphers_allocated) {
1623 kfree(objp: local->hw.wiphy->cipher_suites);
1624 local->wiphy_ciphers_allocated = false;
1625 }
1626 kfree(objp: local->int_scan_req);
1627 return result;
1628}
1629EXPORT_SYMBOL(ieee80211_register_hw);
1630
1631void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1632{
1633 struct ieee80211_local *local = hw_to_local(hw);
1634
1635 tasklet_kill(t: &local->tx_pending_tasklet);
1636 tasklet_kill(t: &local->tasklet);
1637
1638#ifdef CONFIG_INET
1639 unregister_inetaddr_notifier(nb: &local->ifa_notifier);
1640#endif
1641#if IS_ENABLED(CONFIG_IPV6)
1642 unregister_inet6addr_notifier(nb: &local->ifa6_notifier);
1643#endif
1644
1645 rtnl_lock();
1646
1647 /*
1648 * At this point, interface list manipulations are fine
1649 * because the driver cannot be handing us frames any
1650 * more and the tasklet is killed.
1651 */
1652 ieee80211_remove_interfaces(local);
1653
1654 ieee80211_txq_teardown_flows(local);
1655
1656 wiphy_lock(wiphy: local->hw.wiphy);
1657 wiphy_delayed_work_cancel(wiphy: local->hw.wiphy, dwork: &local->roc_work);
1658 wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->reconfig_filter);
1659 wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->sched_scan_stopped_work);
1660 wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->radar_detected_work);
1661 wiphy_unlock(wiphy: local->hw.wiphy);
1662 rtnl_unlock();
1663
1664 cancel_work_sync(work: &local->restart_work);
1665
1666 ieee80211_clear_tx_pending(local);
1667 rate_control_deinitialize(local);
1668
1669 if (skb_queue_len(list_: &local->skb_queue) ||
1670 skb_queue_len(list_: &local->skb_queue_unreliable))
1671 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1672 skb_queue_purge(list: &local->skb_queue);
1673 skb_queue_purge(list: &local->skb_queue_unreliable);
1674
1675 wiphy_unregister(wiphy: local->hw.wiphy);
1676 destroy_workqueue(wq: local->workqueue);
1677 ieee80211_led_exit(local);
1678 kfree(objp: local->int_scan_req);
1679}
1680EXPORT_SYMBOL(ieee80211_unregister_hw);
1681
1682static int ieee80211_free_ack_frame(int id, void *p, void *data)
1683{
1684 WARN_ONCE(1, "Have pending ack frames!\n");
1685 kfree_skb(skb: p);
1686 return 0;
1687}
1688
1689void ieee80211_free_hw(struct ieee80211_hw *hw)
1690{
1691 struct ieee80211_local *local = hw_to_local(hw);
1692 enum nl80211_band band;
1693
1694 mutex_destroy(lock: &local->iflist_mtx);
1695
1696 if (local->wiphy_ciphers_allocated) {
1697 kfree(objp: local->hw.wiphy->cipher_suites);
1698 local->wiphy_ciphers_allocated = false;
1699 }
1700
1701 idr_for_each(&local->ack_status_frames,
1702 fn: ieee80211_free_ack_frame, NULL);
1703 idr_destroy(&local->ack_status_frames);
1704
1705 sta_info_stop(local);
1706
1707 ieee80211_free_led_names(local);
1708
1709 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1710 if (!(local->sband_allocated & BIT(band)))
1711 continue;
1712 kfree(objp: local->hw.wiphy->bands[band]);
1713 }
1714
1715 wiphy_free(wiphy: local->hw.wiphy);
1716}
1717EXPORT_SYMBOL(ieee80211_free_hw);
1718
1719static const char * const drop_reasons_monitor[] = {
1720#define V(x) #x,
1721 [0] = "RX_DROP_MONITOR",
1722 MAC80211_DROP_REASONS_MONITOR(V)
1723};
1724
1725static struct drop_reason_list drop_reason_list_monitor = {
1726 .reasons = drop_reasons_monitor,
1727 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1728};
1729
1730static const char * const drop_reasons_unusable[] = {
1731 [0] = "RX_DROP_UNUSABLE",
1732 MAC80211_DROP_REASONS_UNUSABLE(V)
1733#undef V
1734};
1735
1736static struct drop_reason_list drop_reason_list_unusable = {
1737 .reasons = drop_reasons_unusable,
1738 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1739};
1740
1741static int __init ieee80211_init(void)
1742{
1743 struct sk_buff *skb;
1744 int ret;
1745
1746 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1747 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1748 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1749
1750 ret = rc80211_minstrel_init();
1751 if (ret)
1752 return ret;
1753
1754 ret = ieee80211_iface_init();
1755 if (ret)
1756 goto err_netdev;
1757
1758 drop_reasons_register_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1759 list: &drop_reason_list_monitor);
1760 drop_reasons_register_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1761 list: &drop_reason_list_unusable);
1762
1763 return 0;
1764 err_netdev:
1765 rc80211_minstrel_exit();
1766
1767 return ret;
1768}
1769
1770static void __exit ieee80211_exit(void)
1771{
1772 rc80211_minstrel_exit();
1773
1774 ieee80211s_stop();
1775
1776 ieee80211_iface_exit();
1777
1778 drop_reasons_unregister_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1779 drop_reasons_unregister_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1780
1781 rcu_barrier();
1782}
1783
1784
1785subsys_initcall(ieee80211_init);
1786module_exit(ieee80211_exit);
1787
1788MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1789MODULE_LICENSE("GPL");
1790

source code of linux/net/mac80211/main.c