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;
257 /* wait for scan work complete */
258 flush_workqueue(local->workqueue);
259 flush_work(&local->sched_scan_stopped_work);
261 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
262 "%s called with hardware scan in progress\n", __func__);
264 flush_work(&local->radar_detected_work);
265 /* we might do interface manipulations, so need both */
267 wiphy_lock(local->hw.wiphy);
268 list_for_each_entry(sdata, &local->interfaces, list) {
270 * XXX: there may be more work for other vif types and even
271 * for station mode: a good thing would be to run most of
272 * the iface type's dependent _stop (ieee80211_mg_stop,
273 * ieee80211_ibss_stop) etc...
274 * For now, fix only the specific bug that was seen: race
275 * between csa_connection_drop_work and us.
277 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
279 * This worker is scheduled from the iface worker that
280 * runs on mac80211's workqueue, so we can't be
281 * scheduling this worker after the cancel right here.
282 * The exception is ieee80211_chswitch_done.
283 * Then we can have a race...
285 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
286 if (sdata->vif.csa_active) {
288 ieee80211_sta_connection_lost(sdata,
289 sdata->u.mgd.associated->bssid,
290 WLAN_REASON_UNSPECIFIED, false);
294 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
296 ieee80211_scan_cancel(local);
298 /* make sure any new ROC will consider local->in_reconfig */
299 flush_delayed_work(&local->roc_work);
300 flush_work(&local->hw_roc_done);
302 /* wait for all packet processing to be done */
305 ret = ieee80211_reconfig(local);
306 wiphy_unlock(local->hw.wiphy);
309 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
314 void ieee80211_restart_hw(struct ieee80211_hw *hw)
316 struct ieee80211_local *local = hw_to_local(hw);
318 trace_api_restart_hw(local);
320 wiphy_info(hw->wiphy,
321 "Hardware restart was requested\n");
323 /* use this reason, ieee80211_reconfig will unblock it */
324 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
325 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
329 * Stop all Rx during the reconfig. We don't want state changes
330 * or driver callbacks while this is in progress.
332 local->in_reconfig = true;
335 queue_work(system_freezable_wq, &local->restart_work);
337 EXPORT_SYMBOL(ieee80211_restart_hw);
340 static int ieee80211_ifa_changed(struct notifier_block *nb,
341 unsigned long data, void *arg)
343 struct in_ifaddr *ifa = arg;
344 struct ieee80211_local *local =
345 container_of(nb, struct ieee80211_local,
347 struct net_device *ndev = ifa->ifa_dev->dev;
348 struct wireless_dev *wdev = ndev->ieee80211_ptr;
349 struct in_device *idev;
350 struct ieee80211_sub_if_data *sdata;
351 struct ieee80211_bss_conf *bss_conf;
352 struct ieee80211_if_managed *ifmgd;
355 /* Make sure it's our interface that got changed */
359 if (wdev->wiphy != local->hw.wiphy)
362 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
363 bss_conf = &sdata->vif.bss_conf;
365 /* ARP filtering is only supported in managed mode */
366 if (sdata->vif.type != NL80211_IFTYPE_STATION)
369 idev = __in_dev_get_rtnl(sdata->dev);
373 ifmgd = &sdata->u.mgd;
376 /* Copy the addresses to the bss_conf list */
377 ifa = rtnl_dereference(idev->ifa_list);
379 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
380 bss_conf->arp_addr_list[c] = ifa->ifa_address;
381 ifa = rtnl_dereference(ifa->ifa_next);
385 bss_conf->arp_addr_cnt = c;
387 /* Configure driver only if associated (which also implies it is up) */
388 if (ifmgd->associated)
389 ieee80211_bss_info_change_notify(sdata,
390 BSS_CHANGED_ARP_FILTER);
398 #if IS_ENABLED(CONFIG_IPV6)
399 static int ieee80211_ifa6_changed(struct notifier_block *nb,
400 unsigned long data, void *arg)
402 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
403 struct inet6_dev *idev = ifa->idev;
404 struct net_device *ndev = ifa->idev->dev;
405 struct ieee80211_local *local =
406 container_of(nb, struct ieee80211_local, ifa6_notifier);
407 struct wireless_dev *wdev = ndev->ieee80211_ptr;
408 struct ieee80211_sub_if_data *sdata;
410 /* Make sure it's our interface that got changed */
411 if (!wdev || wdev->wiphy != local->hw.wiphy)
414 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
417 * For now only support station mode. This is mostly because
418 * doing AP would have to handle AP_VLAN in some way ...
420 if (sdata->vif.type != NL80211_IFTYPE_STATION)
423 drv_ipv6_addr_change(local, sdata, idev);
429 /* There isn't a lot of sense in it, but you can transmit anything you like */
430 static const struct ieee80211_txrx_stypes
431 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
432 [NL80211_IFTYPE_ADHOC] = {
434 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
435 BIT(IEEE80211_STYPE_AUTH >> 4) |
436 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
439 [NL80211_IFTYPE_STATION] = {
442 * To support Pre Association Security Negotiation (PASN) while
443 * already associated to one AP, allow user space to register to
444 * Rx authentication frames, so that the user space logic would
445 * be able to receive/handle authentication frames from a
446 * different AP as part of PASN.
447 * It is expected that user space would intelligently register
448 * for Rx authentication frames, i.e., only when PASN is used
449 * and configure a match filter only for PASN authentication
450 * algorithm, as otherwise the MLME functionality of mac80211
453 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
454 BIT(IEEE80211_STYPE_AUTH >> 4) |
455 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
457 [NL80211_IFTYPE_AP] = {
459 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
460 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
462 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
463 BIT(IEEE80211_STYPE_AUTH >> 4) |
464 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
465 BIT(IEEE80211_STYPE_ACTION >> 4),
467 [NL80211_IFTYPE_AP_VLAN] = {
470 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
471 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
473 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
474 BIT(IEEE80211_STYPE_AUTH >> 4) |
475 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
476 BIT(IEEE80211_STYPE_ACTION >> 4),
478 [NL80211_IFTYPE_P2P_CLIENT] = {
480 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
481 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
483 [NL80211_IFTYPE_P2P_GO] = {
485 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
486 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
487 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
488 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
489 BIT(IEEE80211_STYPE_AUTH >> 4) |
490 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
491 BIT(IEEE80211_STYPE_ACTION >> 4),
493 [NL80211_IFTYPE_MESH_POINT] = {
495 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
496 BIT(IEEE80211_STYPE_AUTH >> 4) |
497 BIT(IEEE80211_STYPE_DEAUTH >> 4),
499 [NL80211_IFTYPE_P2P_DEVICE] = {
501 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
502 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
506 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
507 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
508 IEEE80211_HT_AMPDU_PARM_DENSITY,
510 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
511 IEEE80211_HT_CAP_MAX_AMSDU |
512 IEEE80211_HT_CAP_SGI_20 |
513 IEEE80211_HT_CAP_SGI_40 |
514 IEEE80211_HT_CAP_TX_STBC |
515 IEEE80211_HT_CAP_RX_STBC |
516 IEEE80211_HT_CAP_LDPC_CODING |
517 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
519 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
520 0xff, 0xff, 0xff, 0xff, 0xff, },
524 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
526 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
527 IEEE80211_VHT_CAP_SHORT_GI_80 |
528 IEEE80211_VHT_CAP_SHORT_GI_160 |
529 IEEE80211_VHT_CAP_RXSTBC_MASK |
530 IEEE80211_VHT_CAP_TXSTBC |
531 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
532 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
533 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
534 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
535 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
537 .rx_mcs_map = cpu_to_le16(~0),
538 .tx_mcs_map = cpu_to_le16(~0),
542 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
543 const struct ieee80211_ops *ops,
544 const char *requested_name)
546 struct ieee80211_local *local;
551 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
552 !ops->add_interface || !ops->remove_interface ||
553 !ops->configure_filter))
556 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
559 /* check all or no channel context operations exist */
560 i = !!ops->add_chanctx + !!ops->remove_chanctx +
561 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
562 !!ops->unassign_vif_chanctx;
563 if (WARN_ON(i != 0 && i != 5))
565 use_chanctx = i == 5;
567 /* Ensure 32-byte alignment of our private data and hw private data.
568 * We use the wiphy priv data for both our ieee80211_local and for
569 * the driver's private data
571 * In memory it'll be like this:
573 * +-------------------------+
575 * +-------------------------+
576 * | struct ieee80211_local |
577 * +-------------------------+
578 * | driver's private data |
579 * +-------------------------+
582 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
584 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
589 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
591 wiphy->privid = mac80211_wiphy_privid;
593 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
594 WIPHY_FLAG_4ADDR_AP |
595 WIPHY_FLAG_4ADDR_STATION |
596 WIPHY_FLAG_REPORTS_OBSS |
597 WIPHY_FLAG_OFFCHAN_TX;
599 if (!use_chanctx || ops->remain_on_channel)
600 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
602 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
603 NL80211_FEATURE_SAE |
604 NL80211_FEATURE_HT_IBSS |
605 NL80211_FEATURE_VIF_TXPOWER |
606 NL80211_FEATURE_MAC_ON_CREATE |
607 NL80211_FEATURE_USERSPACE_MPM |
608 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
609 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
610 wiphy_ext_feature_set(wiphy,
611 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
612 wiphy_ext_feature_set(wiphy,
613 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
614 wiphy_ext_feature_set(wiphy,
615 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
616 wiphy_ext_feature_set(wiphy,
617 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
620 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
621 NL80211_FEATURE_AP_SCAN;
623 * if the driver behaves correctly using the probe request
624 * (template) from mac80211, then both of these should be
625 * supported even with hw scan - but let drivers opt in.
627 wiphy_ext_feature_set(wiphy,
628 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
629 wiphy_ext_feature_set(wiphy,
630 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
634 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
636 if (ops->wake_tx_queue)
637 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
639 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
641 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
643 local = wiphy_priv(wiphy);
645 if (sta_info_init(local))
648 local->hw.wiphy = wiphy;
650 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
653 local->use_chanctx = use_chanctx;
656 * We need a bit of data queued to build aggregates properly, so
657 * instruct the TCP stack to allow more than a single ms of data
658 * to be queued in the stack. The value is a bit-shift of 1
659 * second, so 7 is ~8ms of queued data. Only affects local TCP
661 * This is the default, anyhow - drivers may need to override it
662 * for local reasons (longer buffers, longer completion time, or
665 local->hw.tx_sk_pacing_shift = 7;
667 /* set up some defaults */
668 local->hw.queues = 1;
669 local->hw.max_rates = 1;
670 local->hw.max_report_rates = 0;
671 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
672 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
673 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
674 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
675 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
676 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
677 IEEE80211_RADIOTAP_MCS_HAVE_GI |
678 IEEE80211_RADIOTAP_MCS_HAVE_BW;
679 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
680 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
681 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
682 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
683 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
684 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
685 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
686 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
688 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
690 wiphy->extended_capabilities = local->ext_capa;
691 wiphy->extended_capabilities_mask = local->ext_capa;
692 wiphy->extended_capabilities_len =
693 ARRAY_SIZE(local->ext_capa);
695 INIT_LIST_HEAD(&local->interfaces);
696 INIT_LIST_HEAD(&local->mon_list);
698 __hw_addr_init(&local->mc_list);
700 mutex_init(&local->iflist_mtx);
701 mutex_init(&local->mtx);
703 mutex_init(&local->key_mtx);
704 spin_lock_init(&local->filter_lock);
705 spin_lock_init(&local->rx_path_lock);
706 spin_lock_init(&local->queue_stop_reason_lock);
708 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
709 INIT_LIST_HEAD(&local->active_txqs[i]);
710 spin_lock_init(&local->active_txq_lock[i]);
711 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
712 local->aql_txq_limit_high[i] =
713 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
716 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
717 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
718 atomic_set(&local->aql_total_pending_airtime, 0);
720 INIT_LIST_HEAD(&local->chanctx_list);
721 mutex_init(&local->chanctx_mtx);
723 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
725 INIT_WORK(&local->restart_work, ieee80211_restart_work);
727 INIT_WORK(&local->radar_detected_work,
728 ieee80211_dfs_radar_detected_work);
730 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
731 local->smps_mode = IEEE80211_SMPS_OFF;
733 INIT_WORK(&local->dynamic_ps_enable_work,
734 ieee80211_dynamic_ps_enable_work);
735 INIT_WORK(&local->dynamic_ps_disable_work,
736 ieee80211_dynamic_ps_disable_work);
737 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
739 INIT_WORK(&local->sched_scan_stopped_work,
740 ieee80211_sched_scan_stopped_work);
742 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
744 spin_lock_init(&local->ack_status_lock);
745 idr_init(&local->ack_status_frames);
747 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
748 skb_queue_head_init(&local->pending[i]);
749 atomic_set(&local->agg_queue_stop[i], 0);
751 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
753 if (ops->wake_tx_queue)
754 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
756 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
758 skb_queue_head_init(&local->skb_queue);
759 skb_queue_head_init(&local->skb_queue_unreliable);
760 skb_queue_head_init(&local->skb_queue_tdls_chsw);
762 ieee80211_alloc_led_names(local);
764 ieee80211_roc_setup(local);
766 local->hw.radiotap_timestamp.units_pos = -1;
767 local->hw.radiotap_timestamp.accuracy = -1;
774 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
776 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
778 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
779 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
780 int n_suites = 0, r = 0, w = 0;
782 static const u32 cipher_suites[] = {
783 /* keep WEP first, it may be removed below */
784 WLAN_CIPHER_SUITE_WEP40,
785 WLAN_CIPHER_SUITE_WEP104,
786 WLAN_CIPHER_SUITE_TKIP,
787 WLAN_CIPHER_SUITE_CCMP,
788 WLAN_CIPHER_SUITE_CCMP_256,
789 WLAN_CIPHER_SUITE_GCMP,
790 WLAN_CIPHER_SUITE_GCMP_256,
792 /* keep last -- depends on hw flags! */
793 WLAN_CIPHER_SUITE_AES_CMAC,
794 WLAN_CIPHER_SUITE_BIP_CMAC_256,
795 WLAN_CIPHER_SUITE_BIP_GMAC_128,
796 WLAN_CIPHER_SUITE_BIP_GMAC_256,
799 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
800 local->hw.wiphy->cipher_suites) {
801 /* If the driver advertises, or doesn't support SW crypto,
802 * we only need to remove WEP if necessary.
807 /* well if it has _no_ ciphers ... fine */
808 if (!local->hw.wiphy->n_cipher_suites)
811 /* Driver provides cipher suites, but we need to exclude WEP */
812 suites = kmemdup(local->hw.wiphy->cipher_suites,
813 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
818 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
819 u32 suite = local->hw.wiphy->cipher_suites[r];
821 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
822 suite == WLAN_CIPHER_SUITE_WEP104)
826 } else if (!local->hw.cipher_schemes) {
827 /* If the driver doesn't have cipher schemes, there's nothing
828 * else to do other than assign the (software supported and
829 * perhaps offloaded) cipher suites.
831 local->hw.wiphy->cipher_suites = cipher_suites;
832 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
835 local->hw.wiphy->n_cipher_suites -= 4;
838 local->hw.wiphy->cipher_suites += 2;
839 local->hw.wiphy->n_cipher_suites -= 2;
842 /* not dynamically allocated, so just return */
845 const struct ieee80211_cipher_scheme *cs;
847 cs = local->hw.cipher_schemes;
849 /* Driver specifies cipher schemes only (but not cipher suites
850 * including the schemes)
852 * We start counting ciphers defined by schemes, TKIP, CCMP,
853 * CCMP-256, GCMP, and GCMP-256
855 n_suites = local->hw.n_cipher_schemes + 5;
857 /* check if we have WEP40 and WEP104 */
861 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
867 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
871 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
872 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
873 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
874 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
875 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
878 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
879 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
883 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
884 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
885 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
886 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
889 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
890 suites[w++] = cs[r].cipher;
891 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
898 local->hw.wiphy->cipher_suites = suites;
899 local->hw.wiphy->n_cipher_suites = w;
900 local->wiphy_ciphers_allocated = true;
905 int ieee80211_register_hw(struct ieee80211_hw *hw)
907 struct ieee80211_local *local = hw_to_local(hw);
909 enum nl80211_band band;
910 int channels, max_bitrates;
911 bool supp_ht, supp_vht, supp_he;
912 struct cfg80211_chan_def dflt_chandef = {};
914 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
915 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
916 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
919 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
920 (!local->ops->tdls_channel_switch ||
921 !local->ops->tdls_cancel_channel_switch ||
922 !local->ops->tdls_recv_channel_switch))
925 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
926 !local->ops->set_frag_threshold))
929 if (WARN_ON(local->hw.wiphy->interface_modes &
930 BIT(NL80211_IFTYPE_NAN) &&
931 (!local->ops->start_nan || !local->ops->stop_nan)))
935 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
939 if (!local->use_chanctx) {
940 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
941 const struct ieee80211_iface_combination *comb;
943 comb = &local->hw.wiphy->iface_combinations[i];
945 if (comb->num_different_channels > 1)
949 /* DFS is not supported with multi-channel combinations yet */
950 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
951 const struct ieee80211_iface_combination *comb;
953 comb = &local->hw.wiphy->iface_combinations[i];
955 if (comb->radar_detect_widths &&
956 comb->num_different_channels > 1)
961 /* Only HW csum features are currently compatible with mac80211 */
962 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
965 if (hw->max_report_rates == 0)
966 hw->max_report_rates = hw->max_rates;
968 local->rx_chains = 1;
971 * generic code guarantees at least one band,
972 * set this very early because much code assumes
973 * that hw.conf.channel is assigned
980 for (band = 0; band < NUM_NL80211_BANDS; band++) {
981 struct ieee80211_supported_band *sband;
983 sband = local->hw.wiphy->bands[band];
987 if (!dflt_chandef.chan) {
989 * Assign the first enabled channel to dflt_chandef
990 * from the list of channels
992 for (i = 0; i < sband->n_channels; i++)
993 if (!(sband->channels[i].flags &
994 IEEE80211_CHAN_DISABLED))
996 /* if none found then use the first anyway */
997 if (i == sband->n_channels)
999 cfg80211_chandef_create(&dflt_chandef,
1000 &sband->channels[i],
1001 NL80211_CHAN_NO_HT);
1002 /* init channel we're on */
1003 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1004 local->hw.conf.chandef = dflt_chandef;
1005 local->_oper_chandef = dflt_chandef;
1007 local->monitor_chandef = dflt_chandef;
1010 channels += sband->n_channels;
1012 if (max_bitrates < sband->n_bitrates)
1013 max_bitrates = sband->n_bitrates;
1014 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1015 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1018 supp_he = !!ieee80211_get_he_sta_cap(sband);
1020 /* HT, VHT, HE require QoS, thus >= 4 queues */
1021 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1022 (supp_ht || supp_vht || supp_he)))
1025 if (!sband->ht_cap.ht_supported)
1028 /* TODO: consider VHT for RX chains, hopefully it's the same */
1030 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1033 /* no need to mask, SM_PS_DISABLED has all bits set */
1034 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1035 IEEE80211_HT_CAP_SM_PS_SHIFT;
1038 /* if low-level driver supports AP, we also support VLAN.
1039 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1040 * based on their support to transmit SW encrypted packets.
1042 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1043 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1044 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1045 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1048 /* mac80211 always supports monitor */
1049 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1050 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1052 /* mac80211 doesn't support more than one IBSS interface right now */
1053 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1054 const struct ieee80211_iface_combination *c;
1057 c = &hw->wiphy->iface_combinations[i];
1059 for (j = 0; j < c->n_limits; j++)
1060 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1061 c->limits[j].max > 1)
1065 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1066 sizeof(void *) * channels, GFP_KERNEL);
1067 if (!local->int_scan_req)
1070 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1071 if (!local->hw.wiphy->bands[band])
1073 local->int_scan_req->rates[band] = (u32) -1;
1076 #ifndef CONFIG_MAC80211_MESH
1077 /* mesh depends on Kconfig, but drivers should set it if they want */
1078 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1081 /* if the underlying driver supports mesh, mac80211 will (at least)
1082 * provide routing of mesh authentication frames to userspace */
1083 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1084 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1086 /* mac80211 supports control port protocol changing */
1087 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1089 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1090 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1091 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1092 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1093 if (hw->max_signal <= 0) {
1095 goto fail_workqueue;
1099 /* Mac80211 and therefore all drivers using SW crypto only
1100 * are able to handle PTK rekeys and Extended Key ID.
1102 if (!local->ops->set_key) {
1103 wiphy_ext_feature_set(local->hw.wiphy,
1104 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1105 wiphy_ext_feature_set(local->hw.wiphy,
1106 NL80211_EXT_FEATURE_EXT_KEY_ID);
1109 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1110 wiphy_ext_feature_set(local->hw.wiphy,
1111 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1114 * Calculate scan IE length -- we need this to alloc
1115 * memory and to subtract from the driver limit. It
1116 * includes the DS Params, (extended) supported rates, and HT
1117 * information -- SSID is the driver's responsibility.
1119 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1122 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1125 local->scan_ies_len +=
1126 2 + sizeof(struct ieee80211_vht_cap);
1128 /* HE cap element is variable in size - set len to allow max size */
1130 * TODO: 1 is added at the end of the calculation to accommodate for
1131 * the temporary placing of the HE capabilities IE under EXT.
1132 * Remove it once it is placed in the final place.
1135 local->scan_ies_len +=
1136 2 + sizeof(struct ieee80211_he_cap_elem) +
1137 sizeof(struct ieee80211_he_mcs_nss_supp) +
1138 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1140 if (!local->ops->hw_scan) {
1141 /* For hw_scan, driver needs to set these up. */
1142 local->hw.wiphy->max_scan_ssids = 4;
1143 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1147 * If the driver supports any scan IEs, then assume the
1148 * limit includes the IEs mac80211 will add, otherwise
1149 * leave it at zero and let the driver sort it out; we
1150 * still pass our IEs to the driver but userspace will
1151 * not be allowed to in that case.
1153 if (local->hw.wiphy->max_scan_ie_len)
1154 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1156 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1157 local->hw.n_cipher_schemes))) {
1159 goto fail_workqueue;
1162 result = ieee80211_init_cipher_suites(local);
1164 goto fail_workqueue;
1166 if (!local->ops->remain_on_channel)
1167 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1169 /* mac80211 based drivers don't support internal TDLS setup */
1170 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1171 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1173 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1174 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1175 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1177 /* mac80211 supports multi BSSID, if the driver supports it */
1178 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1179 local->hw.wiphy->support_mbssid = true;
1180 if (ieee80211_hw_check(&local->hw,
1181 SUPPORTS_ONLY_HE_MULTI_BSSID))
1182 local->hw.wiphy->support_only_he_mbssid = true;
1184 local->ext_capa[2] |=
1185 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1188 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1191 * We use the number of queues for feature tests (QoS, HT) internally
1192 * so restrict them appropriately.
1194 if (hw->queues > IEEE80211_MAX_QUEUES)
1195 hw->queues = IEEE80211_MAX_QUEUES;
1198 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1199 if (!local->workqueue) {
1201 goto fail_workqueue;
1205 * The hardware needs headroom for sending the frame,
1206 * and we need some headroom for passing the frame to monitor
1207 * interfaces, but never both at the same time.
1209 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1210 IEEE80211_TX_STATUS_HEADROOM);
1213 * if the driver doesn't specify a max listen interval we
1214 * use 5 which should be a safe default
1216 if (local->hw.max_listen_interval == 0)
1217 local->hw.max_listen_interval = 5;
1219 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1221 local->dynamic_ps_forced_timeout = -1;
1223 if (!local->hw.max_nan_de_entries)
1224 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1226 if (!local->hw.weight_multiplier)
1227 local->hw.weight_multiplier = 1;
1229 ieee80211_wep_init(local);
1231 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1233 ieee80211_led_init(local);
1235 result = ieee80211_txq_setup_flows(local);
1240 result = ieee80211_init_rate_ctrl_alg(local,
1241 hw->rate_control_algorithm);
1244 wiphy_debug(local->hw.wiphy,
1245 "Failed to initialize rate control algorithm\n");
1249 if (local->rate_ctrl) {
1250 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1251 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1252 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1256 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1257 * or have it when we don't, copy the sband structure and set/clear it.
1258 * This is necessary because rate scaling algorithms could be switched
1259 * and have different support values.
1260 * Print a message so that in the common case the reallocation can be
1263 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1264 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1265 struct ieee80211_supported_band *sband;
1266 bool local_cap, ie_cap;
1268 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1270 sband = local->hw.wiphy->bands[band];
1271 if (!sband || !sband->vht_cap.vht_supported)
1274 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1275 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1277 if (local_cap == ie_cap)
1280 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1286 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1289 sband->vht_cap.vht_mcs.tx_highest ^=
1290 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1292 local->hw.wiphy->bands[band] = sband;
1293 local->sband_allocated |= BIT(band);
1296 result = wiphy_register(local->hw.wiphy);
1298 goto fail_wiphy_register;
1300 debugfs_hw_add(local);
1301 rate_control_add_debugfs(local);
1304 wiphy_lock(hw->wiphy);
1306 /* add one default STA interface if supported */
1307 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1308 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1309 struct vif_params params = {0};
1311 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1312 NL80211_IFTYPE_STATION, ¶ms);
1314 wiphy_warn(local->hw.wiphy,
1315 "Failed to add default virtual iface\n");
1318 wiphy_unlock(hw->wiphy);
1322 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1323 result = register_inetaddr_notifier(&local->ifa_notifier);
1328 #if IS_ENABLED(CONFIG_IPV6)
1329 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1330 result = register_inet6addr_notifier(&local->ifa6_notifier);
1337 #if IS_ENABLED(CONFIG_IPV6)
1340 unregister_inetaddr_notifier(&local->ifa_notifier);
1343 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1346 wiphy_unregister(local->hw.wiphy);
1347 fail_wiphy_register:
1349 rate_control_deinitialize(local);
1350 ieee80211_remove_interfaces(local);
1354 ieee80211_led_exit(local);
1355 destroy_workqueue(local->workqueue);
1357 if (local->wiphy_ciphers_allocated)
1358 kfree(local->hw.wiphy->cipher_suites);
1359 kfree(local->int_scan_req);
1362 EXPORT_SYMBOL(ieee80211_register_hw);
1364 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1366 struct ieee80211_local *local = hw_to_local(hw);
1368 tasklet_kill(&local->tx_pending_tasklet);
1369 tasklet_kill(&local->tasklet);
1372 unregister_inetaddr_notifier(&local->ifa_notifier);
1374 #if IS_ENABLED(CONFIG_IPV6)
1375 unregister_inet6addr_notifier(&local->ifa6_notifier);
1381 * At this point, interface list manipulations are fine
1382 * because the driver cannot be handing us frames any
1383 * more and the tasklet is killed.
1385 ieee80211_remove_interfaces(local);
1389 cancel_delayed_work_sync(&local->roc_work);
1390 cancel_work_sync(&local->restart_work);
1391 cancel_work_sync(&local->reconfig_filter);
1392 cancel_work_sync(&local->tdls_chsw_work);
1393 flush_work(&local->sched_scan_stopped_work);
1394 flush_work(&local->radar_detected_work);
1396 ieee80211_clear_tx_pending(local);
1397 rate_control_deinitialize(local);
1399 if (skb_queue_len(&local->skb_queue) ||
1400 skb_queue_len(&local->skb_queue_unreliable))
1401 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1402 skb_queue_purge(&local->skb_queue);
1403 skb_queue_purge(&local->skb_queue_unreliable);
1404 skb_queue_purge(&local->skb_queue_tdls_chsw);
1406 wiphy_unregister(local->hw.wiphy);
1407 destroy_workqueue(local->workqueue);
1408 ieee80211_led_exit(local);
1409 kfree(local->int_scan_req);
1411 EXPORT_SYMBOL(ieee80211_unregister_hw);
1413 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1415 WARN_ONCE(1, "Have pending ack frames!\n");
1420 void ieee80211_free_hw(struct ieee80211_hw *hw)
1422 struct ieee80211_local *local = hw_to_local(hw);
1423 enum nl80211_band band;
1425 mutex_destroy(&local->iflist_mtx);
1426 mutex_destroy(&local->mtx);
1428 if (local->wiphy_ciphers_allocated)
1429 kfree(local->hw.wiphy->cipher_suites);
1431 idr_for_each(&local->ack_status_frames,
1432 ieee80211_free_ack_frame, NULL);
1433 idr_destroy(&local->ack_status_frames);
1435 sta_info_stop(local);
1437 ieee80211_free_led_names(local);
1439 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1440 if (!(local->sband_allocated & BIT(band)))
1442 kfree(local->hw.wiphy->bands[band]);
1445 wiphy_free(local->hw.wiphy);
1447 EXPORT_SYMBOL(ieee80211_free_hw);
1449 static int __init ieee80211_init(void)
1451 struct sk_buff *skb;
1454 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1455 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1456 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1458 ret = rc80211_minstrel_init();
1462 ret = ieee80211_iface_init();
1468 rc80211_minstrel_exit();
1473 static void __exit ieee80211_exit(void)
1475 rc80211_minstrel_exit();
1479 ieee80211_iface_exit();
1485 subsys_initcall(ieee80211_init);
1486 module_exit(ieee80211_exit);
1488 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1489 MODULE_LICENSE("GPL");