1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
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/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 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
78 WARN_ON(new_flags & (1<<31));
80 local->filter_flags = new_flags & ~(1<<31);
83 static void ieee80211_reconfig_filter(struct work_struct *work)
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
88 ieee80211_configure_filter(local);
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
108 chandef = local->_oper_chandef;
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
129 if (!conf_is_ht(&local->hw.conf)) {
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
141 power = ieee80211_chandef_max_power(&chandef);
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
149 power = min(power, sdata->vif.bss_conf.txpower);
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
185 * FIXME: integrate rfkill with mac80211 and then add this
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 struct ieee80211_local *local = sdata->local;
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
216 static void ieee80211_tasklet_handler(unsigned long data)
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
228 ieee80211_rx(&local->hw, skb);
230 case IEEE80211_TX_STATUS_MSG:
232 ieee80211_tx_status(&local->hw, skb);
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
243 static void ieee80211_restart_work(struct work_struct *work)
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251 flush_work(&local->sched_scan_stopped_work);
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
256 flush_work(&local->radar_detected_work);
258 list_for_each_entry(sdata, &local->interfaces, list) {
260 * XXX: there may be more work for other vif types and even
261 * for station mode: a good thing would be to run most of
262 * the iface type's dependent _stop (ieee80211_mg_stop,
263 * ieee80211_ibss_stop) etc...
264 * For now, fix only the specific bug that was seen: race
265 * between csa_connection_drop_work and us.
267 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
269 * This worker is scheduled from the iface worker that
270 * runs on mac80211's workqueue, so we can't be
271 * scheduling this worker after the cancel right here.
272 * The exception is ieee80211_chswitch_done.
273 * Then we can have a race...
275 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
277 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
279 ieee80211_scan_cancel(local);
281 /* make sure any new ROC will consider local->in_reconfig */
282 flush_delayed_work(&local->roc_work);
283 flush_work(&local->hw_roc_done);
285 /* wait for all packet processing to be done */
288 ieee80211_reconfig(local);
292 void ieee80211_restart_hw(struct ieee80211_hw *hw)
294 struct ieee80211_local *local = hw_to_local(hw);
296 trace_api_restart_hw(local);
298 wiphy_info(hw->wiphy,
299 "Hardware restart was requested\n");
301 /* use this reason, ieee80211_reconfig will unblock it */
302 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
303 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
307 * Stop all Rx during the reconfig. We don't want state changes
308 * or driver callbacks while this is in progress.
310 local->in_reconfig = true;
313 queue_work(system_freezable_wq, &local->restart_work);
315 EXPORT_SYMBOL(ieee80211_restart_hw);
318 static int ieee80211_ifa_changed(struct notifier_block *nb,
319 unsigned long data, void *arg)
321 struct in_ifaddr *ifa = arg;
322 struct ieee80211_local *local =
323 container_of(nb, struct ieee80211_local,
325 struct net_device *ndev = ifa->ifa_dev->dev;
326 struct wireless_dev *wdev = ndev->ieee80211_ptr;
327 struct in_device *idev;
328 struct ieee80211_sub_if_data *sdata;
329 struct ieee80211_bss_conf *bss_conf;
330 struct ieee80211_if_managed *ifmgd;
333 /* Make sure it's our interface that got changed */
337 if (wdev->wiphy != local->hw.wiphy)
340 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
341 bss_conf = &sdata->vif.bss_conf;
343 /* ARP filtering is only supported in managed mode */
344 if (sdata->vif.type != NL80211_IFTYPE_STATION)
347 idev = __in_dev_get_rtnl(sdata->dev);
351 ifmgd = &sdata->u.mgd;
354 /* Copy the addresses to the bss_conf list */
355 ifa = rtnl_dereference(idev->ifa_list);
357 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
358 bss_conf->arp_addr_list[c] = ifa->ifa_address;
359 ifa = rtnl_dereference(ifa->ifa_next);
363 bss_conf->arp_addr_cnt = c;
365 /* Configure driver only if associated (which also implies it is up) */
366 if (ifmgd->associated)
367 ieee80211_bss_info_change_notify(sdata,
368 BSS_CHANGED_ARP_FILTER);
376 #if IS_ENABLED(CONFIG_IPV6)
377 static int ieee80211_ifa6_changed(struct notifier_block *nb,
378 unsigned long data, void *arg)
380 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
381 struct inet6_dev *idev = ifa->idev;
382 struct net_device *ndev = ifa->idev->dev;
383 struct ieee80211_local *local =
384 container_of(nb, struct ieee80211_local, ifa6_notifier);
385 struct wireless_dev *wdev = ndev->ieee80211_ptr;
386 struct ieee80211_sub_if_data *sdata;
388 /* Make sure it's our interface that got changed */
389 if (!wdev || wdev->wiphy != local->hw.wiphy)
392 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
395 * For now only support station mode. This is mostly because
396 * doing AP would have to handle AP_VLAN in some way ...
398 if (sdata->vif.type != NL80211_IFTYPE_STATION)
401 drv_ipv6_addr_change(local, sdata, idev);
407 /* There isn't a lot of sense in it, but you can transmit anything you like */
408 static const struct ieee80211_txrx_stypes
409 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
410 [NL80211_IFTYPE_ADHOC] = {
412 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
413 BIT(IEEE80211_STYPE_AUTH >> 4) |
414 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
417 [NL80211_IFTYPE_STATION] = {
419 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
420 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
422 [NL80211_IFTYPE_AP] = {
424 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
426 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
427 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
428 BIT(IEEE80211_STYPE_AUTH >> 4) |
429 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
430 BIT(IEEE80211_STYPE_ACTION >> 4),
432 [NL80211_IFTYPE_AP_VLAN] = {
435 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
436 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
438 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
439 BIT(IEEE80211_STYPE_AUTH >> 4) |
440 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
441 BIT(IEEE80211_STYPE_ACTION >> 4),
443 [NL80211_IFTYPE_P2P_CLIENT] = {
445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
448 [NL80211_IFTYPE_P2P_GO] = {
450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
453 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
454 BIT(IEEE80211_STYPE_AUTH >> 4) |
455 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
456 BIT(IEEE80211_STYPE_ACTION >> 4),
458 [NL80211_IFTYPE_MESH_POINT] = {
460 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
461 BIT(IEEE80211_STYPE_AUTH >> 4) |
462 BIT(IEEE80211_STYPE_DEAUTH >> 4),
464 [NL80211_IFTYPE_P2P_DEVICE] = {
466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
471 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
472 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
473 IEEE80211_HT_AMPDU_PARM_DENSITY,
475 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
476 IEEE80211_HT_CAP_MAX_AMSDU |
477 IEEE80211_HT_CAP_SGI_20 |
478 IEEE80211_HT_CAP_SGI_40 |
479 IEEE80211_HT_CAP_TX_STBC |
480 IEEE80211_HT_CAP_RX_STBC |
481 IEEE80211_HT_CAP_LDPC_CODING |
482 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
484 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
485 0xff, 0xff, 0xff, 0xff, 0xff, },
489 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
491 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
492 IEEE80211_VHT_CAP_SHORT_GI_80 |
493 IEEE80211_VHT_CAP_SHORT_GI_160 |
494 IEEE80211_VHT_CAP_RXSTBC_MASK |
495 IEEE80211_VHT_CAP_TXSTBC |
496 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
497 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
498 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
499 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
500 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
502 .rx_mcs_map = cpu_to_le16(~0),
503 .tx_mcs_map = cpu_to_le16(~0),
507 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
508 const struct ieee80211_ops *ops,
509 const char *requested_name)
511 struct ieee80211_local *local;
516 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
517 !ops->add_interface || !ops->remove_interface ||
518 !ops->configure_filter))
521 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
524 /* check all or no channel context operations exist */
525 i = !!ops->add_chanctx + !!ops->remove_chanctx +
526 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
527 !!ops->unassign_vif_chanctx;
528 if (WARN_ON(i != 0 && i != 5))
530 use_chanctx = i == 5;
532 /* Ensure 32-byte alignment of our private data and hw private data.
533 * We use the wiphy priv data for both our ieee80211_local and for
534 * the driver's private data
536 * In memory it'll be like this:
538 * +-------------------------+
540 * +-------------------------+
541 * | struct ieee80211_local |
542 * +-------------------------+
543 * | driver's private data |
544 * +-------------------------+
547 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
549 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
554 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
556 wiphy->privid = mac80211_wiphy_privid;
558 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
559 WIPHY_FLAG_4ADDR_AP |
560 WIPHY_FLAG_4ADDR_STATION |
561 WIPHY_FLAG_REPORTS_OBSS |
562 WIPHY_FLAG_OFFCHAN_TX;
564 if (ops->remain_on_channel)
565 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
567 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
568 NL80211_FEATURE_SAE |
569 NL80211_FEATURE_HT_IBSS |
570 NL80211_FEATURE_VIF_TXPOWER |
571 NL80211_FEATURE_MAC_ON_CREATE |
572 NL80211_FEATURE_USERSPACE_MPM |
573 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
574 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
575 wiphy_ext_feature_set(wiphy,
576 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
579 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
580 NL80211_FEATURE_AP_SCAN;
582 * if the driver behaves correctly using the probe request
583 * (template) from mac80211, then both of these should be
584 * supported even with hw scan - but let drivers opt in.
586 wiphy_ext_feature_set(wiphy,
587 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
588 wiphy_ext_feature_set(wiphy,
589 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
593 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
595 if (ops->wake_tx_queue)
596 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
600 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
602 local = wiphy_priv(wiphy);
604 if (sta_info_init(local))
607 local->hw.wiphy = wiphy;
609 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
612 local->use_chanctx = use_chanctx;
615 * We need a bit of data queued to build aggregates properly, so
616 * instruct the TCP stack to allow more than a single ms of data
617 * to be queued in the stack. The value is a bit-shift of 1
618 * second, so 7 is ~8ms of queued data. Only affects local TCP
620 * This is the default, anyhow - drivers may need to override it
621 * for local reasons (longer buffers, longer completion time, or
624 local->hw.tx_sk_pacing_shift = 7;
626 /* set up some defaults */
627 local->hw.queues = 1;
628 local->hw.max_rates = 1;
629 local->hw.max_report_rates = 0;
630 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
631 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
632 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
633 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
634 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
635 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
636 IEEE80211_RADIOTAP_MCS_HAVE_GI |
637 IEEE80211_RADIOTAP_MCS_HAVE_BW;
638 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
639 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
640 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
641 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
642 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
643 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
644 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
646 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
648 wiphy->extended_capabilities = local->ext_capa;
649 wiphy->extended_capabilities_mask = local->ext_capa;
650 wiphy->extended_capabilities_len =
651 ARRAY_SIZE(local->ext_capa);
653 INIT_LIST_HEAD(&local->interfaces);
654 INIT_LIST_HEAD(&local->mon_list);
656 __hw_addr_init(&local->mc_list);
658 mutex_init(&local->iflist_mtx);
659 mutex_init(&local->mtx);
661 mutex_init(&local->key_mtx);
662 spin_lock_init(&local->filter_lock);
663 spin_lock_init(&local->rx_path_lock);
664 spin_lock_init(&local->queue_stop_reason_lock);
666 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
667 INIT_LIST_HEAD(&local->active_txqs[i]);
668 spin_lock_init(&local->active_txq_lock[i]);
670 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
672 INIT_LIST_HEAD(&local->chanctx_list);
673 mutex_init(&local->chanctx_mtx);
675 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
677 INIT_WORK(&local->restart_work, ieee80211_restart_work);
679 INIT_WORK(&local->radar_detected_work,
680 ieee80211_dfs_radar_detected_work);
682 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
683 local->smps_mode = IEEE80211_SMPS_OFF;
685 INIT_WORK(&local->dynamic_ps_enable_work,
686 ieee80211_dynamic_ps_enable_work);
687 INIT_WORK(&local->dynamic_ps_disable_work,
688 ieee80211_dynamic_ps_disable_work);
689 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
691 INIT_WORK(&local->sched_scan_stopped_work,
692 ieee80211_sched_scan_stopped_work);
694 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
696 spin_lock_init(&local->ack_status_lock);
697 idr_init(&local->ack_status_frames);
699 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
700 skb_queue_head_init(&local->pending[i]);
701 atomic_set(&local->agg_queue_stop[i], 0);
703 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
704 (unsigned long)local);
706 if (ops->wake_tx_queue)
707 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
708 (unsigned long)local);
710 tasklet_init(&local->tasklet,
711 ieee80211_tasklet_handler,
712 (unsigned long) local);
714 skb_queue_head_init(&local->skb_queue);
715 skb_queue_head_init(&local->skb_queue_unreliable);
716 skb_queue_head_init(&local->skb_queue_tdls_chsw);
718 ieee80211_alloc_led_names(local);
720 ieee80211_roc_setup(local);
722 local->hw.radiotap_timestamp.units_pos = -1;
723 local->hw.radiotap_timestamp.accuracy = -1;
730 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
732 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
734 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
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);
1302 destroy_workqueue(local->workqueue);
1304 wiphy_unregister(local->hw.wiphy);
1305 fail_wiphy_register:
1306 if (local->wiphy_ciphers_allocated)
1307 kfree(local->hw.wiphy->cipher_suites);
1308 kfree(local->int_scan_req);
1311 EXPORT_SYMBOL(ieee80211_register_hw);
1313 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1315 struct ieee80211_local *local = hw_to_local(hw);
1317 tasklet_kill(&local->tx_pending_tasklet);
1318 tasklet_kill(&local->tasklet);
1321 unregister_inetaddr_notifier(&local->ifa_notifier);
1323 #if IS_ENABLED(CONFIG_IPV6)
1324 unregister_inet6addr_notifier(&local->ifa6_notifier);
1330 * At this point, interface list manipulations are fine
1331 * because the driver cannot be handing us frames any
1332 * more and the tasklet is killed.
1334 ieee80211_remove_interfaces(local);
1338 cancel_delayed_work_sync(&local->roc_work);
1339 cancel_work_sync(&local->restart_work);
1340 cancel_work_sync(&local->reconfig_filter);
1341 cancel_work_sync(&local->tdls_chsw_work);
1342 flush_work(&local->sched_scan_stopped_work);
1343 flush_work(&local->radar_detected_work);
1345 ieee80211_clear_tx_pending(local);
1346 rate_control_deinitialize(local);
1348 if (skb_queue_len(&local->skb_queue) ||
1349 skb_queue_len(&local->skb_queue_unreliable))
1350 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1351 skb_queue_purge(&local->skb_queue);
1352 skb_queue_purge(&local->skb_queue_unreliable);
1353 skb_queue_purge(&local->skb_queue_tdls_chsw);
1355 destroy_workqueue(local->workqueue);
1356 wiphy_unregister(local->hw.wiphy);
1357 ieee80211_led_exit(local);
1358 kfree(local->int_scan_req);
1360 EXPORT_SYMBOL(ieee80211_unregister_hw);
1362 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1364 WARN_ONCE(1, "Have pending ack frames!\n");
1369 void ieee80211_free_hw(struct ieee80211_hw *hw)
1371 struct ieee80211_local *local = hw_to_local(hw);
1372 enum nl80211_band band;
1374 mutex_destroy(&local->iflist_mtx);
1375 mutex_destroy(&local->mtx);
1377 if (local->wiphy_ciphers_allocated)
1378 kfree(local->hw.wiphy->cipher_suites);
1380 idr_for_each(&local->ack_status_frames,
1381 ieee80211_free_ack_frame, NULL);
1382 idr_destroy(&local->ack_status_frames);
1384 sta_info_stop(local);
1386 ieee80211_free_led_names(local);
1388 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1389 if (!(local->sband_allocated & BIT(band)))
1391 kfree(local->hw.wiphy->bands[band]);
1394 wiphy_free(local->hw.wiphy);
1396 EXPORT_SYMBOL(ieee80211_free_hw);
1398 static int __init ieee80211_init(void)
1400 struct sk_buff *skb;
1403 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1404 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1405 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1407 ret = rc80211_minstrel_init();
1411 ret = ieee80211_iface_init();
1417 rc80211_minstrel_exit();
1422 static void __exit ieee80211_exit(void)
1424 rc80211_minstrel_exit();
1428 ieee80211_iface_exit();
1434 subsys_initcall(ieee80211_init);
1435 module_exit(ieee80211_exit);
1437 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1438 MODULE_LICENSE("GPL");