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 - 2019 Intel Corporation
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/inetdevice.h>
23 #include <net/net_namespace.h>
24 #include <net/cfg80211.h>
25 #include <net/addrconf.h>
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
35 void ieee80211_configure_filter(struct ieee80211_local *local)
38 unsigned int changed_flags;
39 unsigned int new_flags = 0;
41 if (atomic_read(&local->iff_allmultis))
42 new_flags |= FIF_ALLMULTI;
44 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
45 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
46 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48 if (local->fif_probe_req || local->probe_req_reg)
49 new_flags |= FIF_PROBE_REQ;
51 if (local->fif_fcsfail)
52 new_flags |= FIF_FCSFAIL;
54 if (local->fif_plcpfail)
55 new_flags |= FIF_PLCPFAIL;
57 if (local->fif_control)
58 new_flags |= FIF_CONTROL;
60 if (local->fif_other_bss)
61 new_flags |= FIF_OTHER_BSS;
63 if (local->fif_pspoll)
64 new_flags |= FIF_PSPOLL;
66 spin_lock_bh(&local->filter_lock);
67 changed_flags = local->filter_flags ^ new_flags;
69 mc = drv_prepare_multicast(local, &local->mc_list);
70 spin_unlock_bh(&local->filter_lock);
75 drv_configure_filter(local, changed_flags, &new_flags, mc);
77 WARN_ON(new_flags & (1<<31));
79 local->filter_flags = new_flags & ~(1<<31);
82 static void ieee80211_reconfig_filter(struct work_struct *work)
84 struct ieee80211_local *local =
85 container_of(work, struct ieee80211_local, reconfig_filter);
87 ieee80211_configure_filter(local);
90 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 struct ieee80211_sub_if_data *sdata;
93 struct cfg80211_chan_def chandef = {};
98 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100 if (local->scan_chandef.chan) {
101 chandef = local->scan_chandef;
102 } else if (local->tmp_channel) {
103 chandef.chan = local->tmp_channel;
104 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
105 chandef.center_freq1 = chandef.chan->center_freq;
107 chandef = local->_oper_chandef;
109 WARN(!cfg80211_chandef_valid(&chandef),
110 "control:%d MHz width:%d center: %d/%d MHz",
111 chandef.chan->center_freq, chandef.width,
112 chandef.center_freq1, chandef.center_freq2);
114 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
115 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121 if (offchannel_flag ||
122 !cfg80211_chandef_identical(&local->hw.conf.chandef,
123 &local->_oper_chandef)) {
124 local->hw.conf.chandef = chandef;
125 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
128 if (!conf_is_ht(&local->hw.conf)) {
130 * mac80211.h documents that this is only valid
131 * when the channel is set to an HT type, and
132 * that otherwise STATIC is used.
134 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
135 } else if (local->hw.conf.smps_mode != local->smps_mode) {
136 local->hw.conf.smps_mode = local->smps_mode;
137 changed |= IEEE80211_CONF_CHANGE_SMPS;
140 power = ieee80211_chandef_max_power(&chandef);
143 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
144 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148 power = min(power, sdata->vif.bss_conf.txpower);
152 if (local->hw.conf.power_level != power) {
153 changed |= IEEE80211_CONF_CHANGE_POWER;
154 local->hw.conf.power_level = power;
160 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
166 if (!local->use_chanctx)
167 changed |= ieee80211_hw_conf_chan(local);
169 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
170 IEEE80211_CONF_CHANGE_POWER);
172 if (changed && local->open_count) {
173 ret = drv_config(local, changed);
176 * HW reconfiguration should never fail, the driver has told
177 * us what it can support so it should live up to that promise.
180 * rfkill is not integrated with mac80211 and a
181 * configuration command can thus fail if hardware rfkill
184 * FIXME: integrate rfkill with mac80211 and then add this
194 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_local *local = sdata->local;
199 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
202 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
205 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207 sdata->vif.bss_conf.use_cts_prot = false;
208 sdata->vif.bss_conf.use_short_preamble = false;
209 sdata->vif.bss_conf.use_short_slot = false;
210 return BSS_CHANGED_ERP_CTS_PROT |
211 BSS_CHANGED_ERP_PREAMBLE |
212 BSS_CHANGED_ERP_SLOT;
215 static void ieee80211_tasklet_handler(unsigned long data)
217 struct ieee80211_local *local = (struct ieee80211_local *) data;
220 while ((skb = skb_dequeue(&local->skb_queue)) ||
221 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
222 switch (skb->pkt_type) {
223 case IEEE80211_RX_MSG:
224 /* Clear skb->pkt_type in order to not confuse kernel
227 ieee80211_rx(&local->hw, skb);
229 case IEEE80211_TX_STATUS_MSG:
231 ieee80211_tx_status(&local->hw, skb);
234 WARN(1, "mac80211: Packet is of unknown type %d\n",
242 static void ieee80211_restart_work(struct work_struct *work)
244 struct ieee80211_local *local =
245 container_of(work, struct ieee80211_local, restart_work);
246 struct ieee80211_sub_if_data *sdata;
248 /* wait for scan work complete */
249 flush_workqueue(local->workqueue);
250 flush_work(&local->sched_scan_stopped_work);
252 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
253 "%s called with hardware scan in progress\n", __func__);
255 flush_work(&local->radar_detected_work);
257 list_for_each_entry(sdata, &local->interfaces, list) {
259 * XXX: there may be more work for other vif types and even
260 * for station mode: a good thing would be to run most of
261 * the iface type's dependent _stop (ieee80211_mg_stop,
262 * ieee80211_ibss_stop) etc...
263 * For now, fix only the specific bug that was seen: race
264 * between csa_connection_drop_work and us.
266 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
268 * This worker is scheduled from the iface worker that
269 * runs on mac80211's workqueue, so we can't be
270 * scheduling this worker after the cancel right here.
271 * The exception is ieee80211_chswitch_done.
272 * Then we can have a race...
274 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
276 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
278 ieee80211_scan_cancel(local);
280 /* make sure any new ROC will consider local->in_reconfig */
281 flush_delayed_work(&local->roc_work);
282 flush_work(&local->hw_roc_done);
284 /* wait for all packet processing to be done */
287 ieee80211_reconfig(local);
291 void ieee80211_restart_hw(struct ieee80211_hw *hw)
293 struct ieee80211_local *local = hw_to_local(hw);
295 trace_api_restart_hw(local);
297 wiphy_info(hw->wiphy,
298 "Hardware restart was requested\n");
300 /* use this reason, ieee80211_reconfig will unblock it */
301 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
302 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
306 * Stop all Rx during the reconfig. We don't want state changes
307 * or driver callbacks while this is in progress.
309 local->in_reconfig = true;
312 queue_work(system_freezable_wq, &local->restart_work);
314 EXPORT_SYMBOL(ieee80211_restart_hw);
317 static int ieee80211_ifa_changed(struct notifier_block *nb,
318 unsigned long data, void *arg)
320 struct in_ifaddr *ifa = arg;
321 struct ieee80211_local *local =
322 container_of(nb, struct ieee80211_local,
324 struct net_device *ndev = ifa->ifa_dev->dev;
325 struct wireless_dev *wdev = ndev->ieee80211_ptr;
326 struct in_device *idev;
327 struct ieee80211_sub_if_data *sdata;
328 struct ieee80211_bss_conf *bss_conf;
329 struct ieee80211_if_managed *ifmgd;
332 /* Make sure it's our interface that got changed */
336 if (wdev->wiphy != local->hw.wiphy)
339 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
340 bss_conf = &sdata->vif.bss_conf;
342 /* ARP filtering is only supported in managed mode */
343 if (sdata->vif.type != NL80211_IFTYPE_STATION)
346 idev = __in_dev_get_rtnl(sdata->dev);
350 ifmgd = &sdata->u.mgd;
353 /* Copy the addresses to the bss_conf list */
354 ifa = idev->ifa_list;
356 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
357 bss_conf->arp_addr_list[c] = ifa->ifa_address;
362 bss_conf->arp_addr_cnt = c;
364 /* Configure driver only if associated (which also implies it is up) */
365 if (ifmgd->associated)
366 ieee80211_bss_info_change_notify(sdata,
367 BSS_CHANGED_ARP_FILTER);
375 #if IS_ENABLED(CONFIG_IPV6)
376 static int ieee80211_ifa6_changed(struct notifier_block *nb,
377 unsigned long data, void *arg)
379 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
380 struct inet6_dev *idev = ifa->idev;
381 struct net_device *ndev = ifa->idev->dev;
382 struct ieee80211_local *local =
383 container_of(nb, struct ieee80211_local, ifa6_notifier);
384 struct wireless_dev *wdev = ndev->ieee80211_ptr;
385 struct ieee80211_sub_if_data *sdata;
387 /* Make sure it's our interface that got changed */
388 if (!wdev || wdev->wiphy != local->hw.wiphy)
391 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
394 * For now only support station mode. This is mostly because
395 * doing AP would have to handle AP_VLAN in some way ...
397 if (sdata->vif.type != NL80211_IFTYPE_STATION)
400 drv_ipv6_addr_change(local, sdata, idev);
406 /* There isn't a lot of sense in it, but you can transmit anything you like */
407 static const struct ieee80211_txrx_stypes
408 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
409 [NL80211_IFTYPE_ADHOC] = {
411 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
412 BIT(IEEE80211_STYPE_AUTH >> 4) |
413 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
416 [NL80211_IFTYPE_STATION] = {
418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
421 [NL80211_IFTYPE_AP] = {
423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
427 BIT(IEEE80211_STYPE_AUTH >> 4) |
428 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
429 BIT(IEEE80211_STYPE_ACTION >> 4),
431 [NL80211_IFTYPE_AP_VLAN] = {
434 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
435 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
436 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
437 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
438 BIT(IEEE80211_STYPE_AUTH >> 4) |
439 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
440 BIT(IEEE80211_STYPE_ACTION >> 4),
442 [NL80211_IFTYPE_P2P_CLIENT] = {
444 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
445 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
447 [NL80211_IFTYPE_P2P_GO] = {
449 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
450 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
451 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
452 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
453 BIT(IEEE80211_STYPE_AUTH >> 4) |
454 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
455 BIT(IEEE80211_STYPE_ACTION >> 4),
457 [NL80211_IFTYPE_MESH_POINT] = {
459 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
460 BIT(IEEE80211_STYPE_AUTH >> 4) |
461 BIT(IEEE80211_STYPE_DEAUTH >> 4),
463 [NL80211_IFTYPE_P2P_DEVICE] = {
465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
466 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
470 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
471 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
472 IEEE80211_HT_AMPDU_PARM_DENSITY,
474 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
475 IEEE80211_HT_CAP_MAX_AMSDU |
476 IEEE80211_HT_CAP_SGI_20 |
477 IEEE80211_HT_CAP_SGI_40 |
478 IEEE80211_HT_CAP_TX_STBC |
479 IEEE80211_HT_CAP_RX_STBC |
480 IEEE80211_HT_CAP_LDPC_CODING |
481 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
483 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
484 0xff, 0xff, 0xff, 0xff, 0xff, },
488 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
490 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
491 IEEE80211_VHT_CAP_SHORT_GI_80 |
492 IEEE80211_VHT_CAP_SHORT_GI_160 |
493 IEEE80211_VHT_CAP_RXSTBC_MASK |
494 IEEE80211_VHT_CAP_TXSTBC |
495 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
496 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
497 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
498 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
499 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
501 .rx_mcs_map = cpu_to_le16(~0),
502 .tx_mcs_map = cpu_to_le16(~0),
506 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
507 const struct ieee80211_ops *ops,
508 const char *requested_name)
510 struct ieee80211_local *local;
515 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
516 !ops->add_interface || !ops->remove_interface ||
517 !ops->configure_filter))
520 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
523 /* check all or no channel context operations exist */
524 i = !!ops->add_chanctx + !!ops->remove_chanctx +
525 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
526 !!ops->unassign_vif_chanctx;
527 if (WARN_ON(i != 0 && i != 5))
529 use_chanctx = i == 5;
531 /* Ensure 32-byte alignment of our private data and hw private data.
532 * We use the wiphy priv data for both our ieee80211_local and for
533 * the driver's private data
535 * In memory it'll be like this:
537 * +-------------------------+
539 * +-------------------------+
540 * | struct ieee80211_local |
541 * +-------------------------+
542 * | driver's private data |
543 * +-------------------------+
546 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
548 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
553 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
555 wiphy->privid = mac80211_wiphy_privid;
557 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
558 WIPHY_FLAG_4ADDR_AP |
559 WIPHY_FLAG_4ADDR_STATION |
560 WIPHY_FLAG_REPORTS_OBSS |
561 WIPHY_FLAG_OFFCHAN_TX;
563 if (ops->remain_on_channel)
564 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
566 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
567 NL80211_FEATURE_SAE |
568 NL80211_FEATURE_HT_IBSS |
569 NL80211_FEATURE_VIF_TXPOWER |
570 NL80211_FEATURE_MAC_ON_CREATE |
571 NL80211_FEATURE_USERSPACE_MPM |
572 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
573 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
574 wiphy_ext_feature_set(wiphy,
575 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
578 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
579 NL80211_FEATURE_AP_SCAN;
581 * if the driver behaves correctly using the probe request
582 * (template) from mac80211, then both of these should be
583 * supported even with hw scan - but let drivers opt in.
585 wiphy_ext_feature_set(wiphy,
586 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
587 wiphy_ext_feature_set(wiphy,
588 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
592 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
594 if (ops->wake_tx_queue)
595 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
597 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
599 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
601 local = wiphy_priv(wiphy);
603 if (sta_info_init(local))
606 local->hw.wiphy = wiphy;
608 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
611 local->use_chanctx = use_chanctx;
614 * We need a bit of data queued to build aggregates properly, so
615 * instruct the TCP stack to allow more than a single ms of data
616 * to be queued in the stack. The value is a bit-shift of 1
617 * second, so 7 is ~8ms of queued data. Only affects local TCP
619 * This is the default, anyhow - drivers may need to override it
620 * for local reasons (longer buffers, longer completion time, or
623 local->hw.tx_sk_pacing_shift = 7;
625 /* set up some defaults */
626 local->hw.queues = 1;
627 local->hw.max_rates = 1;
628 local->hw.max_report_rates = 0;
629 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
630 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
631 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
632 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
633 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
634 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
635 IEEE80211_RADIOTAP_MCS_HAVE_GI |
636 IEEE80211_RADIOTAP_MCS_HAVE_BW;
637 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
638 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
639 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
640 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
641 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
642 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
643 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
645 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
647 wiphy->extended_capabilities = local->ext_capa;
648 wiphy->extended_capabilities_mask = local->ext_capa;
649 wiphy->extended_capabilities_len =
650 ARRAY_SIZE(local->ext_capa);
652 INIT_LIST_HEAD(&local->interfaces);
653 INIT_LIST_HEAD(&local->mon_list);
655 __hw_addr_init(&local->mc_list);
657 mutex_init(&local->iflist_mtx);
658 mutex_init(&local->mtx);
660 mutex_init(&local->key_mtx);
661 spin_lock_init(&local->filter_lock);
662 spin_lock_init(&local->rx_path_lock);
663 spin_lock_init(&local->queue_stop_reason_lock);
665 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
666 INIT_LIST_HEAD(&local->active_txqs[i]);
667 spin_lock_init(&local->active_txq_lock[i]);
669 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
671 INIT_LIST_HEAD(&local->chanctx_list);
672 mutex_init(&local->chanctx_mtx);
674 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
676 INIT_WORK(&local->restart_work, ieee80211_restart_work);
678 INIT_WORK(&local->radar_detected_work,
679 ieee80211_dfs_radar_detected_work);
681 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
682 local->smps_mode = IEEE80211_SMPS_OFF;
684 INIT_WORK(&local->dynamic_ps_enable_work,
685 ieee80211_dynamic_ps_enable_work);
686 INIT_WORK(&local->dynamic_ps_disable_work,
687 ieee80211_dynamic_ps_disable_work);
688 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
690 INIT_WORK(&local->sched_scan_stopped_work,
691 ieee80211_sched_scan_stopped_work);
693 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
695 spin_lock_init(&local->ack_status_lock);
696 idr_init(&local->ack_status_frames);
698 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
699 skb_queue_head_init(&local->pending[i]);
700 atomic_set(&local->agg_queue_stop[i], 0);
702 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
703 (unsigned long)local);
705 if (ops->wake_tx_queue)
706 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
707 (unsigned long)local);
709 tasklet_init(&local->tasklet,
710 ieee80211_tasklet_handler,
711 (unsigned long) local);
713 skb_queue_head_init(&local->skb_queue);
714 skb_queue_head_init(&local->skb_queue_unreliable);
715 skb_queue_head_init(&local->skb_queue_tdls_chsw);
717 ieee80211_alloc_led_names(local);
719 ieee80211_roc_setup(local);
721 local->hw.radiotap_timestamp.units_pos = -1;
722 local->hw.radiotap_timestamp.accuracy = -1;
729 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
731 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
733 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
734 IS_ERR(local->wep_rx_tfm));
735 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
736 int n_suites = 0, r = 0, w = 0;
738 static const u32 cipher_suites[] = {
739 /* keep WEP first, it may be removed below */
740 WLAN_CIPHER_SUITE_WEP40,
741 WLAN_CIPHER_SUITE_WEP104,
742 WLAN_CIPHER_SUITE_TKIP,
743 WLAN_CIPHER_SUITE_CCMP,
744 WLAN_CIPHER_SUITE_CCMP_256,
745 WLAN_CIPHER_SUITE_GCMP,
746 WLAN_CIPHER_SUITE_GCMP_256,
748 /* keep last -- depends on hw flags! */
749 WLAN_CIPHER_SUITE_AES_CMAC,
750 WLAN_CIPHER_SUITE_BIP_CMAC_256,
751 WLAN_CIPHER_SUITE_BIP_GMAC_128,
752 WLAN_CIPHER_SUITE_BIP_GMAC_256,
755 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
756 local->hw.wiphy->cipher_suites) {
757 /* If the driver advertises, or doesn't support SW crypto,
758 * we only need to remove WEP if necessary.
763 /* well if it has _no_ ciphers ... fine */
764 if (!local->hw.wiphy->n_cipher_suites)
767 /* Driver provides cipher suites, but we need to exclude WEP */
768 suites = kmemdup(local->hw.wiphy->cipher_suites,
769 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
774 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
775 u32 suite = local->hw.wiphy->cipher_suites[r];
777 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
778 suite == WLAN_CIPHER_SUITE_WEP104)
782 } else if (!local->hw.cipher_schemes) {
783 /* If the driver doesn't have cipher schemes, there's nothing
784 * else to do other than assign the (software supported and
785 * perhaps offloaded) cipher suites.
787 local->hw.wiphy->cipher_suites = cipher_suites;
788 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
791 local->hw.wiphy->n_cipher_suites -= 4;
794 local->hw.wiphy->cipher_suites += 2;
795 local->hw.wiphy->n_cipher_suites -= 2;
798 /* not dynamically allocated, so just return */
801 const struct ieee80211_cipher_scheme *cs;
803 cs = local->hw.cipher_schemes;
805 /* Driver specifies cipher schemes only (but not cipher suites
806 * including the schemes)
808 * We start counting ciphers defined by schemes, TKIP, CCMP,
809 * CCMP-256, GCMP, and GCMP-256
811 n_suites = local->hw.n_cipher_schemes + 5;
813 /* check if we have WEP40 and WEP104 */
817 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
823 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
827 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
828 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
829 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
830 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
831 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
834 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
835 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
839 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
840 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
841 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
842 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
845 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
846 suites[w++] = cs[r].cipher;
847 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
854 local->hw.wiphy->cipher_suites = suites;
855 local->hw.wiphy->n_cipher_suites = w;
856 local->wiphy_ciphers_allocated = true;
861 int ieee80211_register_hw(struct ieee80211_hw *hw)
863 struct ieee80211_local *local = hw_to_local(hw);
865 enum nl80211_band band;
866 int channels, max_bitrates;
867 bool supp_ht, supp_vht, supp_he;
868 netdev_features_t feature_whitelist;
869 struct cfg80211_chan_def dflt_chandef = {};
871 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
872 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
873 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
876 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
877 (!local->ops->tdls_channel_switch ||
878 !local->ops->tdls_cancel_channel_switch ||
879 !local->ops->tdls_recv_channel_switch))
882 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
883 !local->ops->set_frag_threshold))
886 if (WARN_ON(local->hw.wiphy->interface_modes &
887 BIT(NL80211_IFTYPE_NAN) &&
888 (!local->ops->start_nan || !local->ops->stop_nan)))
892 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
896 if (!local->use_chanctx) {
897 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
898 const struct ieee80211_iface_combination *comb;
900 comb = &local->hw.wiphy->iface_combinations[i];
902 if (comb->num_different_channels > 1)
907 * WDS is currently prohibited when channel contexts are used
908 * because there's no clear definition of which channel WDS
909 * type interfaces use
911 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
914 /* DFS is not supported with multi-channel combinations yet */
915 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
916 const struct ieee80211_iface_combination *comb;
918 comb = &local->hw.wiphy->iface_combinations[i];
920 if (comb->radar_detect_widths &&
921 comb->num_different_channels > 1)
926 /* Only HW csum features are currently compatible with mac80211 */
927 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
928 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
929 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
930 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
933 if (hw->max_report_rates == 0)
934 hw->max_report_rates = hw->max_rates;
936 local->rx_chains = 1;
939 * generic code guarantees at least one band,
940 * set this very early because much code assumes
941 * that hw.conf.channel is assigned
948 for (band = 0; band < NUM_NL80211_BANDS; band++) {
949 struct ieee80211_supported_band *sband;
951 sband = local->hw.wiphy->bands[band];
955 if (!dflt_chandef.chan) {
956 cfg80211_chandef_create(&dflt_chandef,
959 /* init channel we're on */
960 if (!local->use_chanctx && !local->_oper_chandef.chan) {
961 local->hw.conf.chandef = dflt_chandef;
962 local->_oper_chandef = dflt_chandef;
964 local->monitor_chandef = dflt_chandef;
967 channels += sband->n_channels;
969 if (max_bitrates < sband->n_bitrates)
970 max_bitrates = sband->n_bitrates;
971 supp_ht = supp_ht || sband->ht_cap.ht_supported;
972 supp_vht = supp_vht || sband->vht_cap.vht_supported;
975 supp_he = !!ieee80211_get_he_sta_cap(sband);
977 if (!sband->ht_cap.ht_supported)
980 /* TODO: consider VHT for RX chains, hopefully it's the same */
982 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
985 /* no need to mask, SM_PS_DISABLED has all bits set */
986 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
987 IEEE80211_HT_CAP_SM_PS_SHIFT;
990 /* if low-level driver supports AP, we also support VLAN.
991 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
992 * based on their support to transmit SW encrypted packets.
994 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
995 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
996 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
997 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1000 /* mac80211 always supports monitor */
1001 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1002 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1004 /* mac80211 doesn't support more than one IBSS interface right now */
1005 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1006 const struct ieee80211_iface_combination *c;
1009 c = &hw->wiphy->iface_combinations[i];
1011 for (j = 0; j < c->n_limits; j++)
1012 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1013 c->limits[j].max > 1)
1017 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1018 sizeof(void *) * channels, GFP_KERNEL);
1019 if (!local->int_scan_req)
1022 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1023 if (!local->hw.wiphy->bands[band])
1025 local->int_scan_req->rates[band] = (u32) -1;
1028 #ifndef CONFIG_MAC80211_MESH
1029 /* mesh depends on Kconfig, but drivers should set it if they want */
1030 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1033 /* if the underlying driver supports mesh, mac80211 will (at least)
1034 * provide routing of mesh authentication frames to userspace */
1035 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1036 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1038 /* mac80211 supports control port protocol changing */
1039 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1041 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1042 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1043 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1044 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1045 if (hw->max_signal <= 0) {
1047 goto fail_wiphy_register;
1051 /* Enable Extended Key IDs when driver allowed it, or when it
1052 * supports neither HW crypto nor A-MPDUs
1054 if ((!local->ops->set_key &&
1055 !ieee80211_hw_check(hw, AMPDU_AGGREGATION)) ||
1056 ieee80211_hw_check(&local->hw, EXT_KEY_ID_NATIVE))
1057 wiphy_ext_feature_set(local->hw.wiphy,
1058 NL80211_EXT_FEATURE_EXT_KEY_ID);
1060 /* Mac80211 and therefore all cards only using SW crypto are able to
1061 * handle PTK rekeys correctly
1063 if (!local->ops->set_key)
1064 wiphy_ext_feature_set(local->hw.wiphy,
1065 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1068 * Calculate scan IE length -- we need this to alloc
1069 * memory and to subtract from the driver limit. It
1070 * includes the DS Params, (extended) supported rates, and HT
1071 * information -- SSID is the driver's responsibility.
1073 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1076 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1079 local->scan_ies_len +=
1080 2 + sizeof(struct ieee80211_vht_cap);
1082 /* HE cap element is variable in size - set len to allow max size */
1084 * TODO: 1 is added at the end of the calculation to accommodate for
1085 * the temporary placing of the HE capabilities IE under EXT.
1086 * Remove it once it is placed in the final place.
1089 local->scan_ies_len +=
1090 2 + sizeof(struct ieee80211_he_cap_elem) +
1091 sizeof(struct ieee80211_he_mcs_nss_supp) +
1092 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1094 if (!local->ops->hw_scan) {
1095 /* For hw_scan, driver needs to set these up. */
1096 local->hw.wiphy->max_scan_ssids = 4;
1097 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1101 * If the driver supports any scan IEs, then assume the
1102 * limit includes the IEs mac80211 will add, otherwise
1103 * leave it at zero and let the driver sort it out; we
1104 * still pass our IEs to the driver but userspace will
1105 * not be allowed to in that case.
1107 if (local->hw.wiphy->max_scan_ie_len)
1108 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1110 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1111 local->hw.n_cipher_schemes));
1113 result = ieee80211_init_cipher_suites(local);
1115 goto fail_wiphy_register;
1117 if (!local->ops->remain_on_channel)
1118 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1120 /* mac80211 based drivers don't support internal TDLS setup */
1121 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1122 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1124 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1125 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1126 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1128 /* mac80211 supports multi BSSID, if the driver supports it */
1129 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1130 local->hw.wiphy->support_mbssid = true;
1131 if (ieee80211_hw_check(&local->hw,
1132 SUPPORTS_ONLY_HE_MULTI_BSSID))
1133 local->hw.wiphy->support_only_he_mbssid = true;
1135 local->ext_capa[2] |=
1136 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1139 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1141 result = wiphy_register(local->hw.wiphy);
1143 goto fail_wiphy_register;
1146 * We use the number of queues for feature tests (QoS, HT) internally
1147 * so restrict them appropriately.
1149 if (hw->queues > IEEE80211_MAX_QUEUES)
1150 hw->queues = IEEE80211_MAX_QUEUES;
1153 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1154 if (!local->workqueue) {
1156 goto fail_workqueue;
1160 * The hardware needs headroom for sending the frame,
1161 * and we need some headroom for passing the frame to monitor
1162 * interfaces, but never both at the same time.
1164 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1165 IEEE80211_TX_STATUS_HEADROOM);
1167 debugfs_hw_add(local);
1170 * if the driver doesn't specify a max listen interval we
1171 * use 5 which should be a safe default
1173 if (local->hw.max_listen_interval == 0)
1174 local->hw.max_listen_interval = 5;
1176 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1178 local->dynamic_ps_forced_timeout = -1;
1180 if (!local->hw.max_nan_de_entries)
1181 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1183 if (!local->hw.weight_multiplier)
1184 local->hw.weight_multiplier = 1;
1186 result = ieee80211_wep_init(local);
1188 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1191 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1193 ieee80211_led_init(local);
1195 result = ieee80211_txq_setup_flows(local);
1201 result = ieee80211_init_rate_ctrl_alg(local,
1202 hw->rate_control_algorithm);
1204 wiphy_debug(local->hw.wiphy,
1205 "Failed to initialize rate control algorithm\n");
1209 if (local->rate_ctrl) {
1210 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1211 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1212 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1216 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1217 * or have it when we don't, copy the sband structure and set/clear it.
1218 * This is necessary because rate scaling algorithms could be switched
1219 * and have different support values.
1220 * Print a message so that in the common case the reallocation can be
1223 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1224 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1225 struct ieee80211_supported_band *sband;
1226 bool local_cap, ie_cap;
1228 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1230 sband = local->hw.wiphy->bands[band];
1231 if (!sband || !sband->vht_cap.vht_supported)
1234 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1235 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1237 if (local_cap == ie_cap)
1240 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1246 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1249 sband->vht_cap.vht_mcs.tx_highest ^=
1250 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1252 local->hw.wiphy->bands[band] = sband;
1253 local->sband_allocated |= BIT(band);
1256 /* add one default STA interface if supported */
1257 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1258 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1259 struct vif_params params = {0};
1261 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1262 NL80211_IFTYPE_STATION, ¶ms);
1264 wiphy_warn(local->hw.wiphy,
1265 "Failed to add default virtual iface\n");
1271 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1272 result = register_inetaddr_notifier(&local->ifa_notifier);
1277 #if IS_ENABLED(CONFIG_IPV6)
1278 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1279 result = register_inet6addr_notifier(&local->ifa6_notifier);
1286 #if IS_ENABLED(CONFIG_IPV6)
1289 unregister_inetaddr_notifier(&local->ifa_notifier);
1292 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1296 rate_control_deinitialize(local);
1297 ieee80211_remove_interfaces(local);
1300 ieee80211_led_exit(local);
1301 ieee80211_wep_free(local);
1303 destroy_workqueue(local->workqueue);
1305 wiphy_unregister(local->hw.wiphy);
1306 fail_wiphy_register:
1307 if (local->wiphy_ciphers_allocated)
1308 kfree(local->hw.wiphy->cipher_suites);
1309 kfree(local->int_scan_req);
1312 EXPORT_SYMBOL(ieee80211_register_hw);
1314 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1316 struct ieee80211_local *local = hw_to_local(hw);
1318 tasklet_kill(&local->tx_pending_tasklet);
1319 tasklet_kill(&local->tasklet);
1322 unregister_inetaddr_notifier(&local->ifa_notifier);
1324 #if IS_ENABLED(CONFIG_IPV6)
1325 unregister_inet6addr_notifier(&local->ifa6_notifier);
1331 * At this point, interface list manipulations are fine
1332 * because the driver cannot be handing us frames any
1333 * more and the tasklet is killed.
1335 ieee80211_remove_interfaces(local);
1339 cancel_delayed_work_sync(&local->roc_work);
1340 cancel_work_sync(&local->restart_work);
1341 cancel_work_sync(&local->reconfig_filter);
1342 cancel_work_sync(&local->tdls_chsw_work);
1343 flush_work(&local->sched_scan_stopped_work);
1344 flush_work(&local->radar_detected_work);
1346 ieee80211_clear_tx_pending(local);
1347 rate_control_deinitialize(local);
1349 if (skb_queue_len(&local->skb_queue) ||
1350 skb_queue_len(&local->skb_queue_unreliable))
1351 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1352 skb_queue_purge(&local->skb_queue);
1353 skb_queue_purge(&local->skb_queue_unreliable);
1354 skb_queue_purge(&local->skb_queue_tdls_chsw);
1356 destroy_workqueue(local->workqueue);
1357 wiphy_unregister(local->hw.wiphy);
1358 ieee80211_wep_free(local);
1359 ieee80211_led_exit(local);
1360 kfree(local->int_scan_req);
1362 EXPORT_SYMBOL(ieee80211_unregister_hw);
1364 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1366 WARN_ONCE(1, "Have pending ack frames!\n");
1371 void ieee80211_free_hw(struct ieee80211_hw *hw)
1373 struct ieee80211_local *local = hw_to_local(hw);
1374 enum nl80211_band band;
1376 mutex_destroy(&local->iflist_mtx);
1377 mutex_destroy(&local->mtx);
1379 if (local->wiphy_ciphers_allocated)
1380 kfree(local->hw.wiphy->cipher_suites);
1382 idr_for_each(&local->ack_status_frames,
1383 ieee80211_free_ack_frame, NULL);
1384 idr_destroy(&local->ack_status_frames);
1386 sta_info_stop(local);
1388 ieee80211_free_led_names(local);
1390 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1391 if (!(local->sband_allocated & BIT(band)))
1393 kfree(local->hw.wiphy->bands[band]);
1396 wiphy_free(local->hw.wiphy);
1398 EXPORT_SYMBOL(ieee80211_free_hw);
1400 static int __init ieee80211_init(void)
1402 struct sk_buff *skb;
1405 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1406 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1407 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1409 ret = rc80211_minstrel_init();
1413 ret = ieee80211_iface_init();
1419 rc80211_minstrel_exit();
1424 static void __exit ieee80211_exit(void)
1426 rc80211_minstrel_exit();
1430 ieee80211_iface_exit();
1436 subsys_initcall(ieee80211_init);
1437 module_exit(ieee80211_exit);
1439 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1440 MODULE_LICENSE("GPL");