1 // SPDX-License-Identifier: GPL-2.0-only
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) 2018-2021 Intel Corporation
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 void ieee80211_configure_filter(struct ieee80211_local *local)
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
67 if (local->rx_mcast_action_reg)
68 new_flags |= FIF_MCAST_ACTION;
70 spin_lock_bh(&local->filter_lock);
71 changed_flags = local->filter_flags ^ new_flags;
73 mc = drv_prepare_multicast(local, &local->mc_list);
74 spin_unlock_bh(&local->filter_lock);
79 drv_configure_filter(local, changed_flags, &new_flags, mc);
81 WARN_ON(new_flags & (1<<31));
83 local->filter_flags = new_flags & ~(1<<31);
86 static void ieee80211_reconfig_filter(struct work_struct *work)
88 struct ieee80211_local *local =
89 container_of(work, struct ieee80211_local, reconfig_filter);
91 ieee80211_configure_filter(local);
94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
96 struct ieee80211_sub_if_data *sdata;
97 struct cfg80211_chan_def chandef = {};
102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
104 if (local->scan_chandef.chan) {
105 chandef = local->scan_chandef;
106 } else if (local->tmp_channel) {
107 chandef.chan = local->tmp_channel;
108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
109 chandef.center_freq1 = chandef.chan->center_freq;
110 chandef.freq1_offset = chandef.chan->freq_offset;
112 chandef = local->_oper_chandef;
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
116 chandef.chan->center_freq, chandef.chan->freq_offset,
117 chandef.width, chandef.center_freq1, chandef.freq1_offset,
118 chandef.center_freq2);
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
134 if (!conf_is_ht(&local->hw.conf)) {
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
146 power = ieee80211_chandef_max_power(&chandef);
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
154 if (sdata->vif.bss_conf.txpower == INT_MIN)
156 power = min(power, sdata->vif.bss_conf.txpower);
160 if (local->hw.conf.power_level != power) {
161 changed |= IEEE80211_CONF_CHANGE_POWER;
162 local->hw.conf.power_level = power;
168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
174 if (!local->use_chanctx)
175 changed |= ieee80211_hw_conf_chan(local);
177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
178 IEEE80211_CONF_CHANGE_POWER);
180 if (changed && local->open_count) {
181 ret = drv_config(local, changed);
184 * HW reconfiguration should never fail, the driver has told
185 * us what it can support so it should live up to that promise.
188 * rfkill is not integrated with mac80211 and a
189 * configuration command can thus fail if hardware rfkill
192 * FIXME: integrate rfkill with mac80211 and then add this
202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
205 struct ieee80211_local *local = sdata->local;
207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
215 sdata->vif.bss_conf.use_cts_prot = false;
216 sdata->vif.bss_conf.use_short_preamble = false;
217 sdata->vif.bss_conf.use_short_slot = false;
218 return BSS_CHANGED_ERP_CTS_PROT |
219 BSS_CHANGED_ERP_PREAMBLE |
220 BSS_CHANGED_ERP_SLOT;
223 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
225 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
228 while ((skb = skb_dequeue(&local->skb_queue)) ||
229 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
230 switch (skb->pkt_type) {
231 case IEEE80211_RX_MSG:
232 /* Clear skb->pkt_type in order to not confuse kernel
235 ieee80211_rx(&local->hw, skb);
237 case IEEE80211_TX_STATUS_MSG:
239 ieee80211_tx_status(&local->hw, skb);
242 WARN(1, "mac80211: Packet is of unknown type %d\n",
250 static void ieee80211_restart_work(struct work_struct *work)
252 struct ieee80211_local *local =
253 container_of(work, struct ieee80211_local, restart_work);
254 struct ieee80211_sub_if_data *sdata;
256 /* wait for scan work complete */
257 flush_workqueue(local->workqueue);
258 flush_work(&local->sched_scan_stopped_work);
260 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
261 "%s called with hardware scan in progress\n", __func__);
263 flush_work(&local->radar_detected_work);
264 /* we might do interface manipulations, so need both */
266 wiphy_lock(local->hw.wiphy);
267 list_for_each_entry(sdata, &local->interfaces, list) {
269 * XXX: there may be more work for other vif types and even
270 * for station mode: a good thing would be to run most of
271 * the iface type's dependent _stop (ieee80211_mg_stop,
272 * ieee80211_ibss_stop) etc...
273 * For now, fix only the specific bug that was seen: race
274 * between csa_connection_drop_work and us.
276 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
278 * This worker is scheduled from the iface worker that
279 * runs on mac80211's workqueue, so we can't be
280 * scheduling this worker after the cancel right here.
281 * The exception is ieee80211_chswitch_done.
282 * Then we can have a race...
284 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
285 if (sdata->vif.csa_active) {
287 ieee80211_sta_connection_lost(sdata,
288 sdata->u.mgd.associated->bssid,
289 WLAN_REASON_UNSPECIFIED, false);
293 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
295 ieee80211_scan_cancel(local);
297 /* make sure any new ROC will consider local->in_reconfig */
298 flush_delayed_work(&local->roc_work);
299 flush_work(&local->hw_roc_done);
301 /* wait for all packet processing to be done */
304 ieee80211_reconfig(local);
305 wiphy_unlock(local->hw.wiphy);
309 void ieee80211_restart_hw(struct ieee80211_hw *hw)
311 struct ieee80211_local *local = hw_to_local(hw);
313 trace_api_restart_hw(local);
315 wiphy_info(hw->wiphy,
316 "Hardware restart was requested\n");
318 /* use this reason, ieee80211_reconfig will unblock it */
319 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
320 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
324 * Stop all Rx during the reconfig. We don't want state changes
325 * or driver callbacks while this is in progress.
327 local->in_reconfig = true;
330 queue_work(system_freezable_wq, &local->restart_work);
332 EXPORT_SYMBOL(ieee80211_restart_hw);
335 static int ieee80211_ifa_changed(struct notifier_block *nb,
336 unsigned long data, void *arg)
338 struct in_ifaddr *ifa = arg;
339 struct ieee80211_local *local =
340 container_of(nb, struct ieee80211_local,
342 struct net_device *ndev = ifa->ifa_dev->dev;
343 struct wireless_dev *wdev = ndev->ieee80211_ptr;
344 struct in_device *idev;
345 struct ieee80211_sub_if_data *sdata;
346 struct ieee80211_bss_conf *bss_conf;
347 struct ieee80211_if_managed *ifmgd;
350 /* Make sure it's our interface that got changed */
354 if (wdev->wiphy != local->hw.wiphy)
357 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
358 bss_conf = &sdata->vif.bss_conf;
360 /* ARP filtering is only supported in managed mode */
361 if (sdata->vif.type != NL80211_IFTYPE_STATION)
364 idev = __in_dev_get_rtnl(sdata->dev);
368 ifmgd = &sdata->u.mgd;
371 /* Copy the addresses to the bss_conf list */
372 ifa = rtnl_dereference(idev->ifa_list);
374 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
375 bss_conf->arp_addr_list[c] = ifa->ifa_address;
376 ifa = rtnl_dereference(ifa->ifa_next);
380 bss_conf->arp_addr_cnt = c;
382 /* Configure driver only if associated (which also implies it is up) */
383 if (ifmgd->associated)
384 ieee80211_bss_info_change_notify(sdata,
385 BSS_CHANGED_ARP_FILTER);
393 #if IS_ENABLED(CONFIG_IPV6)
394 static int ieee80211_ifa6_changed(struct notifier_block *nb,
395 unsigned long data, void *arg)
397 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
398 struct inet6_dev *idev = ifa->idev;
399 struct net_device *ndev = ifa->idev->dev;
400 struct ieee80211_local *local =
401 container_of(nb, struct ieee80211_local, ifa6_notifier);
402 struct wireless_dev *wdev = ndev->ieee80211_ptr;
403 struct ieee80211_sub_if_data *sdata;
405 /* Make sure it's our interface that got changed */
406 if (!wdev || wdev->wiphy != local->hw.wiphy)
409 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
412 * For now only support station mode. This is mostly because
413 * doing AP would have to handle AP_VLAN in some way ...
415 if (sdata->vif.type != NL80211_IFTYPE_STATION)
418 drv_ipv6_addr_change(local, sdata, idev);
424 /* There isn't a lot of sense in it, but you can transmit anything you like */
425 static const struct ieee80211_txrx_stypes
426 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
427 [NL80211_IFTYPE_ADHOC] = {
429 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
430 BIT(IEEE80211_STYPE_AUTH >> 4) |
431 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
432 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
434 [NL80211_IFTYPE_STATION] = {
437 * To support Pre Association Security Negotiation (PASN) while
438 * already associated to one AP, allow user space to register to
439 * Rx authentication frames, so that the user space logic would
440 * be able to receive/handle authentication frames from a
441 * different AP as part of PASN.
442 * It is expected that user space would intelligently register
443 * for Rx authentication frames, i.e., only when PASN is used
444 * and configure a match filter only for PASN authentication
445 * algorithm, as otherwise the MLME functionality of mac80211
448 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
449 BIT(IEEE80211_STYPE_AUTH >> 4) |
450 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
452 [NL80211_IFTYPE_AP] = {
454 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
455 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
457 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
458 BIT(IEEE80211_STYPE_AUTH >> 4) |
459 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
460 BIT(IEEE80211_STYPE_ACTION >> 4),
462 [NL80211_IFTYPE_AP_VLAN] = {
465 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
466 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
468 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
469 BIT(IEEE80211_STYPE_AUTH >> 4) |
470 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
471 BIT(IEEE80211_STYPE_ACTION >> 4),
473 [NL80211_IFTYPE_P2P_CLIENT] = {
475 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
476 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
478 [NL80211_IFTYPE_P2P_GO] = {
480 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
481 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
483 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
484 BIT(IEEE80211_STYPE_AUTH >> 4) |
485 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
486 BIT(IEEE80211_STYPE_ACTION >> 4),
488 [NL80211_IFTYPE_MESH_POINT] = {
490 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
491 BIT(IEEE80211_STYPE_AUTH >> 4) |
492 BIT(IEEE80211_STYPE_DEAUTH >> 4),
494 [NL80211_IFTYPE_P2P_DEVICE] = {
496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
497 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
501 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
502 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
503 IEEE80211_HT_AMPDU_PARM_DENSITY,
505 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
506 IEEE80211_HT_CAP_MAX_AMSDU |
507 IEEE80211_HT_CAP_SGI_20 |
508 IEEE80211_HT_CAP_SGI_40 |
509 IEEE80211_HT_CAP_TX_STBC |
510 IEEE80211_HT_CAP_RX_STBC |
511 IEEE80211_HT_CAP_LDPC_CODING |
512 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
514 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
515 0xff, 0xff, 0xff, 0xff, 0xff, },
519 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
521 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
522 IEEE80211_VHT_CAP_SHORT_GI_80 |
523 IEEE80211_VHT_CAP_SHORT_GI_160 |
524 IEEE80211_VHT_CAP_RXSTBC_MASK |
525 IEEE80211_VHT_CAP_TXSTBC |
526 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
527 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
528 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
529 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
530 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
532 .rx_mcs_map = cpu_to_le16(~0),
533 .tx_mcs_map = cpu_to_le16(~0),
537 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
538 const struct ieee80211_ops *ops,
539 const char *requested_name)
541 struct ieee80211_local *local;
546 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
547 !ops->add_interface || !ops->remove_interface ||
548 !ops->configure_filter))
551 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
554 /* check all or no channel context operations exist */
555 i = !!ops->add_chanctx + !!ops->remove_chanctx +
556 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
557 !!ops->unassign_vif_chanctx;
558 if (WARN_ON(i != 0 && i != 5))
560 use_chanctx = i == 5;
562 /* Ensure 32-byte alignment of our private data and hw private data.
563 * We use the wiphy priv data for both our ieee80211_local and for
564 * the driver's private data
566 * In memory it'll be like this:
568 * +-------------------------+
570 * +-------------------------+
571 * | struct ieee80211_local |
572 * +-------------------------+
573 * | driver's private data |
574 * +-------------------------+
577 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
579 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
584 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
586 wiphy->privid = mac80211_wiphy_privid;
588 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
589 WIPHY_FLAG_4ADDR_AP |
590 WIPHY_FLAG_4ADDR_STATION |
591 WIPHY_FLAG_REPORTS_OBSS |
592 WIPHY_FLAG_OFFCHAN_TX;
594 if (!use_chanctx || ops->remain_on_channel)
595 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
597 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
598 NL80211_FEATURE_SAE |
599 NL80211_FEATURE_HT_IBSS |
600 NL80211_FEATURE_VIF_TXPOWER |
601 NL80211_FEATURE_MAC_ON_CREATE |
602 NL80211_FEATURE_USERSPACE_MPM |
603 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
604 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
605 wiphy_ext_feature_set(wiphy,
606 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
607 wiphy_ext_feature_set(wiphy,
608 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
609 wiphy_ext_feature_set(wiphy,
610 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
611 wiphy_ext_feature_set(wiphy,
612 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
615 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
616 NL80211_FEATURE_AP_SCAN;
618 * if the driver behaves correctly using the probe request
619 * (template) from mac80211, then both of these should be
620 * supported even with hw scan - but let drivers opt in.
622 wiphy_ext_feature_set(wiphy,
623 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
624 wiphy_ext_feature_set(wiphy,
625 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
629 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
631 if (ops->wake_tx_queue)
632 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
634 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
636 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
638 local = wiphy_priv(wiphy);
640 if (sta_info_init(local))
643 local->hw.wiphy = wiphy;
645 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
648 local->use_chanctx = use_chanctx;
651 * We need a bit of data queued to build aggregates properly, so
652 * instruct the TCP stack to allow more than a single ms of data
653 * to be queued in the stack. The value is a bit-shift of 1
654 * second, so 7 is ~8ms of queued data. Only affects local TCP
656 * This is the default, anyhow - drivers may need to override it
657 * for local reasons (longer buffers, longer completion time, or
660 local->hw.tx_sk_pacing_shift = 7;
662 /* set up some defaults */
663 local->hw.queues = 1;
664 local->hw.max_rates = 1;
665 local->hw.max_report_rates = 0;
666 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
667 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
668 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
669 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
670 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
671 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
672 IEEE80211_RADIOTAP_MCS_HAVE_GI |
673 IEEE80211_RADIOTAP_MCS_HAVE_BW;
674 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
675 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
676 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
677 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
678 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
679 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
680 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
681 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
683 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
685 wiphy->extended_capabilities = local->ext_capa;
686 wiphy->extended_capabilities_mask = local->ext_capa;
687 wiphy->extended_capabilities_len =
688 ARRAY_SIZE(local->ext_capa);
690 INIT_LIST_HEAD(&local->interfaces);
691 INIT_LIST_HEAD(&local->mon_list);
693 __hw_addr_init(&local->mc_list);
695 mutex_init(&local->iflist_mtx);
696 mutex_init(&local->mtx);
698 mutex_init(&local->key_mtx);
699 spin_lock_init(&local->filter_lock);
700 spin_lock_init(&local->rx_path_lock);
701 spin_lock_init(&local->queue_stop_reason_lock);
703 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
704 INIT_LIST_HEAD(&local->active_txqs[i]);
705 spin_lock_init(&local->active_txq_lock[i]);
706 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
707 local->aql_txq_limit_high[i] =
708 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
711 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
712 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
713 atomic_set(&local->aql_total_pending_airtime, 0);
715 INIT_LIST_HEAD(&local->chanctx_list);
716 mutex_init(&local->chanctx_mtx);
718 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
720 INIT_WORK(&local->restart_work, ieee80211_restart_work);
722 INIT_WORK(&local->radar_detected_work,
723 ieee80211_dfs_radar_detected_work);
725 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
726 local->smps_mode = IEEE80211_SMPS_OFF;
728 INIT_WORK(&local->dynamic_ps_enable_work,
729 ieee80211_dynamic_ps_enable_work);
730 INIT_WORK(&local->dynamic_ps_disable_work,
731 ieee80211_dynamic_ps_disable_work);
732 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
734 INIT_WORK(&local->sched_scan_stopped_work,
735 ieee80211_sched_scan_stopped_work);
737 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
739 spin_lock_init(&local->ack_status_lock);
740 idr_init(&local->ack_status_frames);
742 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
743 skb_queue_head_init(&local->pending[i]);
744 atomic_set(&local->agg_queue_stop[i], 0);
746 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
748 if (ops->wake_tx_queue)
749 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
751 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
753 skb_queue_head_init(&local->skb_queue);
754 skb_queue_head_init(&local->skb_queue_unreliable);
755 skb_queue_head_init(&local->skb_queue_tdls_chsw);
757 ieee80211_alloc_led_names(local);
759 ieee80211_roc_setup(local);
761 local->hw.radiotap_timestamp.units_pos = -1;
762 local->hw.radiotap_timestamp.accuracy = -1;
769 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
771 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
773 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
774 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
775 int n_suites = 0, r = 0, w = 0;
777 static const u32 cipher_suites[] = {
778 /* keep WEP first, it may be removed below */
779 WLAN_CIPHER_SUITE_WEP40,
780 WLAN_CIPHER_SUITE_WEP104,
781 WLAN_CIPHER_SUITE_TKIP,
782 WLAN_CIPHER_SUITE_CCMP,
783 WLAN_CIPHER_SUITE_CCMP_256,
784 WLAN_CIPHER_SUITE_GCMP,
785 WLAN_CIPHER_SUITE_GCMP_256,
787 /* keep last -- depends on hw flags! */
788 WLAN_CIPHER_SUITE_AES_CMAC,
789 WLAN_CIPHER_SUITE_BIP_CMAC_256,
790 WLAN_CIPHER_SUITE_BIP_GMAC_128,
791 WLAN_CIPHER_SUITE_BIP_GMAC_256,
794 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
795 local->hw.wiphy->cipher_suites) {
796 /* If the driver advertises, or doesn't support SW crypto,
797 * we only need to remove WEP if necessary.
802 /* well if it has _no_ ciphers ... fine */
803 if (!local->hw.wiphy->n_cipher_suites)
806 /* Driver provides cipher suites, but we need to exclude WEP */
807 suites = kmemdup(local->hw.wiphy->cipher_suites,
808 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
813 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
814 u32 suite = local->hw.wiphy->cipher_suites[r];
816 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
817 suite == WLAN_CIPHER_SUITE_WEP104)
821 } else if (!local->hw.cipher_schemes) {
822 /* If the driver doesn't have cipher schemes, there's nothing
823 * else to do other than assign the (software supported and
824 * perhaps offloaded) cipher suites.
826 local->hw.wiphy->cipher_suites = cipher_suites;
827 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
830 local->hw.wiphy->n_cipher_suites -= 4;
833 local->hw.wiphy->cipher_suites += 2;
834 local->hw.wiphy->n_cipher_suites -= 2;
837 /* not dynamically allocated, so just return */
840 const struct ieee80211_cipher_scheme *cs;
842 cs = local->hw.cipher_schemes;
844 /* Driver specifies cipher schemes only (but not cipher suites
845 * including the schemes)
847 * We start counting ciphers defined by schemes, TKIP, CCMP,
848 * CCMP-256, GCMP, and GCMP-256
850 n_suites = local->hw.n_cipher_schemes + 5;
852 /* check if we have WEP40 and WEP104 */
856 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
862 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
866 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
867 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
868 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
869 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
870 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
873 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
874 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
878 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
879 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
880 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
881 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
884 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
885 suites[w++] = cs[r].cipher;
886 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
893 local->hw.wiphy->cipher_suites = suites;
894 local->hw.wiphy->n_cipher_suites = w;
895 local->wiphy_ciphers_allocated = true;
900 int ieee80211_register_hw(struct ieee80211_hw *hw)
902 struct ieee80211_local *local = hw_to_local(hw);
904 enum nl80211_band band;
905 int channels, max_bitrates;
906 bool supp_ht, supp_vht, supp_he;
907 struct cfg80211_chan_def dflt_chandef = {};
909 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
910 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
911 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
914 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
915 (!local->ops->tdls_channel_switch ||
916 !local->ops->tdls_cancel_channel_switch ||
917 !local->ops->tdls_recv_channel_switch))
920 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
921 !local->ops->set_frag_threshold))
924 if (WARN_ON(local->hw.wiphy->interface_modes &
925 BIT(NL80211_IFTYPE_NAN) &&
926 (!local->ops->start_nan || !local->ops->stop_nan)))
930 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
934 if (!local->use_chanctx) {
935 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
936 const struct ieee80211_iface_combination *comb;
938 comb = &local->hw.wiphy->iface_combinations[i];
940 if (comb->num_different_channels > 1)
944 /* DFS is not supported with multi-channel combinations yet */
945 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
946 const struct ieee80211_iface_combination *comb;
948 comb = &local->hw.wiphy->iface_combinations[i];
950 if (comb->radar_detect_widths &&
951 comb->num_different_channels > 1)
956 /* Only HW csum features are currently compatible with mac80211 */
957 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
960 if (hw->max_report_rates == 0)
961 hw->max_report_rates = hw->max_rates;
963 local->rx_chains = 1;
966 * generic code guarantees at least one band,
967 * set this very early because much code assumes
968 * that hw.conf.channel is assigned
975 for (band = 0; band < NUM_NL80211_BANDS; band++) {
976 struct ieee80211_supported_band *sband;
978 sband = local->hw.wiphy->bands[band];
982 if (!dflt_chandef.chan) {
984 * Assign the first enabled channel to dflt_chandef
985 * from the list of channels
987 for (i = 0; i < sband->n_channels; i++)
988 if (!(sband->channels[i].flags &
989 IEEE80211_CHAN_DISABLED))
991 /* if none found then use the first anyway */
992 if (i == sband->n_channels)
994 cfg80211_chandef_create(&dflt_chandef,
997 /* init channel we're on */
998 if (!local->use_chanctx && !local->_oper_chandef.chan) {
999 local->hw.conf.chandef = dflt_chandef;
1000 local->_oper_chandef = dflt_chandef;
1002 local->monitor_chandef = dflt_chandef;
1005 channels += sband->n_channels;
1007 if (max_bitrates < sband->n_bitrates)
1008 max_bitrates = sband->n_bitrates;
1009 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1010 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1013 supp_he = !!ieee80211_get_he_sta_cap(sband);
1015 /* HT, VHT, HE require QoS, thus >= 4 queues */
1016 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1017 (supp_ht || supp_vht || supp_he)))
1020 if (!sband->ht_cap.ht_supported)
1023 /* TODO: consider VHT for RX chains, hopefully it's the same */
1025 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1028 /* no need to mask, SM_PS_DISABLED has all bits set */
1029 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1030 IEEE80211_HT_CAP_SM_PS_SHIFT;
1033 /* if low-level driver supports AP, we also support VLAN.
1034 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1035 * based on their support to transmit SW encrypted packets.
1037 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1038 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1039 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1040 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1043 /* mac80211 always supports monitor */
1044 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1045 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1047 /* mac80211 doesn't support more than one IBSS interface right now */
1048 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1049 const struct ieee80211_iface_combination *c;
1052 c = &hw->wiphy->iface_combinations[i];
1054 for (j = 0; j < c->n_limits; j++)
1055 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1056 c->limits[j].max > 1)
1060 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1061 sizeof(void *) * channels, GFP_KERNEL);
1062 if (!local->int_scan_req)
1065 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1066 if (!local->hw.wiphy->bands[band])
1068 local->int_scan_req->rates[band] = (u32) -1;
1071 #ifndef CONFIG_MAC80211_MESH
1072 /* mesh depends on Kconfig, but drivers should set it if they want */
1073 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1076 /* if the underlying driver supports mesh, mac80211 will (at least)
1077 * provide routing of mesh authentication frames to userspace */
1078 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1079 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1081 /* mac80211 supports control port protocol changing */
1082 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1084 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1085 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1086 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1087 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1088 if (hw->max_signal <= 0) {
1090 goto fail_workqueue;
1094 /* Mac80211 and therefore all drivers using SW crypto only
1095 * are able to handle PTK rekeys and Extended Key ID.
1097 if (!local->ops->set_key) {
1098 wiphy_ext_feature_set(local->hw.wiphy,
1099 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1100 wiphy_ext_feature_set(local->hw.wiphy,
1101 NL80211_EXT_FEATURE_EXT_KEY_ID);
1104 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1105 wiphy_ext_feature_set(local->hw.wiphy,
1106 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1109 * Calculate scan IE length -- we need this to alloc
1110 * memory and to subtract from the driver limit. It
1111 * includes the DS Params, (extended) supported rates, and HT
1112 * information -- SSID is the driver's responsibility.
1114 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1117 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1120 local->scan_ies_len +=
1121 2 + sizeof(struct ieee80211_vht_cap);
1123 /* HE cap element is variable in size - set len to allow max size */
1125 * TODO: 1 is added at the end of the calculation to accommodate for
1126 * the temporary placing of the HE capabilities IE under EXT.
1127 * Remove it once it is placed in the final place.
1130 local->scan_ies_len +=
1131 2 + sizeof(struct ieee80211_he_cap_elem) +
1132 sizeof(struct ieee80211_he_mcs_nss_supp) +
1133 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1135 if (!local->ops->hw_scan) {
1136 /* For hw_scan, driver needs to set these up. */
1137 local->hw.wiphy->max_scan_ssids = 4;
1138 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1142 * If the driver supports any scan IEs, then assume the
1143 * limit includes the IEs mac80211 will add, otherwise
1144 * leave it at zero and let the driver sort it out; we
1145 * still pass our IEs to the driver but userspace will
1146 * not be allowed to in that case.
1148 if (local->hw.wiphy->max_scan_ie_len)
1149 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1151 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1152 local->hw.n_cipher_schemes))) {
1154 goto fail_workqueue;
1157 result = ieee80211_init_cipher_suites(local);
1159 goto fail_workqueue;
1161 if (!local->ops->remain_on_channel)
1162 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1164 /* mac80211 based drivers don't support internal TDLS setup */
1165 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1166 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1168 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1169 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1170 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1172 /* mac80211 supports multi BSSID, if the driver supports it */
1173 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1174 local->hw.wiphy->support_mbssid = true;
1175 if (ieee80211_hw_check(&local->hw,
1176 SUPPORTS_ONLY_HE_MULTI_BSSID))
1177 local->hw.wiphy->support_only_he_mbssid = true;
1179 local->ext_capa[2] |=
1180 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1183 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1186 * We use the number of queues for feature tests (QoS, HT) internally
1187 * so restrict them appropriately.
1189 if (hw->queues > IEEE80211_MAX_QUEUES)
1190 hw->queues = IEEE80211_MAX_QUEUES;
1193 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1194 if (!local->workqueue) {
1196 goto fail_workqueue;
1200 * The hardware needs headroom for sending the frame,
1201 * and we need some headroom for passing the frame to monitor
1202 * interfaces, but never both at the same time.
1204 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1205 IEEE80211_TX_STATUS_HEADROOM);
1208 * if the driver doesn't specify a max listen interval we
1209 * use 5 which should be a safe default
1211 if (local->hw.max_listen_interval == 0)
1212 local->hw.max_listen_interval = 5;
1214 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1216 local->dynamic_ps_forced_timeout = -1;
1218 if (!local->hw.max_nan_de_entries)
1219 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1221 if (!local->hw.weight_multiplier)
1222 local->hw.weight_multiplier = 1;
1224 ieee80211_wep_init(local);
1226 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1228 ieee80211_led_init(local);
1230 result = ieee80211_txq_setup_flows(local);
1235 result = ieee80211_init_rate_ctrl_alg(local,
1236 hw->rate_control_algorithm);
1239 wiphy_debug(local->hw.wiphy,
1240 "Failed to initialize rate control algorithm\n");
1244 if (local->rate_ctrl) {
1245 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1246 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1247 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1251 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1252 * or have it when we don't, copy the sband structure and set/clear it.
1253 * This is necessary because rate scaling algorithms could be switched
1254 * and have different support values.
1255 * Print a message so that in the common case the reallocation can be
1258 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1259 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1260 struct ieee80211_supported_band *sband;
1261 bool local_cap, ie_cap;
1263 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1265 sband = local->hw.wiphy->bands[band];
1266 if (!sband || !sband->vht_cap.vht_supported)
1269 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1270 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1272 if (local_cap == ie_cap)
1275 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1281 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1284 sband->vht_cap.vht_mcs.tx_highest ^=
1285 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1287 local->hw.wiphy->bands[band] = sband;
1288 local->sband_allocated |= BIT(band);
1291 result = wiphy_register(local->hw.wiphy);
1293 goto fail_wiphy_register;
1295 debugfs_hw_add(local);
1296 rate_control_add_debugfs(local);
1299 wiphy_lock(hw->wiphy);
1301 /* add one default STA interface if supported */
1302 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1303 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1304 struct vif_params params = {0};
1306 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1307 NL80211_IFTYPE_STATION, ¶ms);
1309 wiphy_warn(local->hw.wiphy,
1310 "Failed to add default virtual iface\n");
1313 wiphy_unlock(hw->wiphy);
1317 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1318 result = register_inetaddr_notifier(&local->ifa_notifier);
1323 #if IS_ENABLED(CONFIG_IPV6)
1324 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1325 result = register_inet6addr_notifier(&local->ifa6_notifier);
1332 #if IS_ENABLED(CONFIG_IPV6)
1335 unregister_inetaddr_notifier(&local->ifa_notifier);
1338 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1341 wiphy_unregister(local->hw.wiphy);
1342 fail_wiphy_register:
1344 rate_control_deinitialize(local);
1345 ieee80211_remove_interfaces(local);
1349 ieee80211_led_exit(local);
1350 destroy_workqueue(local->workqueue);
1352 if (local->wiphy_ciphers_allocated)
1353 kfree(local->hw.wiphy->cipher_suites);
1354 kfree(local->int_scan_req);
1357 EXPORT_SYMBOL(ieee80211_register_hw);
1359 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1361 struct ieee80211_local *local = hw_to_local(hw);
1363 tasklet_kill(&local->tx_pending_tasklet);
1364 tasklet_kill(&local->tasklet);
1367 unregister_inetaddr_notifier(&local->ifa_notifier);
1369 #if IS_ENABLED(CONFIG_IPV6)
1370 unregister_inet6addr_notifier(&local->ifa6_notifier);
1376 * At this point, interface list manipulations are fine
1377 * because the driver cannot be handing us frames any
1378 * more and the tasklet is killed.
1380 ieee80211_remove_interfaces(local);
1384 cancel_delayed_work_sync(&local->roc_work);
1385 cancel_work_sync(&local->restart_work);
1386 cancel_work_sync(&local->reconfig_filter);
1387 cancel_work_sync(&local->tdls_chsw_work);
1388 flush_work(&local->sched_scan_stopped_work);
1389 flush_work(&local->radar_detected_work);
1391 ieee80211_clear_tx_pending(local);
1392 rate_control_deinitialize(local);
1394 if (skb_queue_len(&local->skb_queue) ||
1395 skb_queue_len(&local->skb_queue_unreliable))
1396 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1397 skb_queue_purge(&local->skb_queue);
1398 skb_queue_purge(&local->skb_queue_unreliable);
1399 skb_queue_purge(&local->skb_queue_tdls_chsw);
1401 wiphy_unregister(local->hw.wiphy);
1402 destroy_workqueue(local->workqueue);
1403 ieee80211_led_exit(local);
1404 kfree(local->int_scan_req);
1406 EXPORT_SYMBOL(ieee80211_unregister_hw);
1408 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1410 WARN_ONCE(1, "Have pending ack frames!\n");
1415 void ieee80211_free_hw(struct ieee80211_hw *hw)
1417 struct ieee80211_local *local = hw_to_local(hw);
1418 enum nl80211_band band;
1420 mutex_destroy(&local->iflist_mtx);
1421 mutex_destroy(&local->mtx);
1423 if (local->wiphy_ciphers_allocated)
1424 kfree(local->hw.wiphy->cipher_suites);
1426 idr_for_each(&local->ack_status_frames,
1427 ieee80211_free_ack_frame, NULL);
1428 idr_destroy(&local->ack_status_frames);
1430 sta_info_stop(local);
1432 ieee80211_free_led_names(local);
1434 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1435 if (!(local->sband_allocated & BIT(band)))
1437 kfree(local->hw.wiphy->bands[band]);
1440 wiphy_free(local->hw.wiphy);
1442 EXPORT_SYMBOL(ieee80211_free_hw);
1444 static int __init ieee80211_init(void)
1446 struct sk_buff *skb;
1449 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1450 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1451 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1453 ret = rc80211_minstrel_init();
1457 ret = ieee80211_iface_init();
1463 rc80211_minstrel_exit();
1468 static void __exit ieee80211_exit(void)
1470 rc80211_minstrel_exit();
1474 ieee80211_iface_exit();
1480 subsys_initcall(ieee80211_init);
1481 module_exit(ieee80211_exit);
1483 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1484 MODULE_LICENSE("GPL");