2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
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/pm_qos.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"
37 static struct lock_class_key ieee80211_rx_skb_queue_class;
39 void ieee80211_configure_filter(struct ieee80211_local *local)
42 unsigned int changed_flags;
43 unsigned int new_flags = 0;
45 if (atomic_read(&local->iff_promiscs))
46 new_flags |= FIF_PROMISC_IN_BSS;
48 if (atomic_read(&local->iff_allmultis))
49 new_flags |= FIF_ALLMULTI;
51 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
52 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
53 new_flags |= FIF_BCN_PRBRESP_PROMISC;
55 if (local->fif_probe_req || local->probe_req_reg)
56 new_flags |= FIF_PROBE_REQ;
58 if (local->fif_fcsfail)
59 new_flags |= FIF_FCSFAIL;
61 if (local->fif_plcpfail)
62 new_flags |= FIF_PLCPFAIL;
64 if (local->fif_control)
65 new_flags |= FIF_CONTROL;
67 if (local->fif_other_bss)
68 new_flags |= FIF_OTHER_BSS;
70 if (local->fif_pspoll)
71 new_flags |= FIF_PSPOLL;
73 spin_lock_bh(&local->filter_lock);
74 changed_flags = local->filter_flags ^ new_flags;
76 mc = drv_prepare_multicast(local, &local->mc_list);
77 spin_unlock_bh(&local->filter_lock);
82 drv_configure_filter(local, changed_flags, &new_flags, mc);
84 WARN_ON(new_flags & (1<<31));
86 local->filter_flags = new_flags & ~(1<<31);
89 static void ieee80211_reconfig_filter(struct work_struct *work)
91 struct ieee80211_local *local =
92 container_of(work, struct ieee80211_local, reconfig_filter);
94 ieee80211_configure_filter(local);
97 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
99 struct ieee80211_sub_if_data *sdata;
100 struct ieee80211_channel *chan;
103 enum nl80211_channel_type channel_type;
105 bool scanning = false;
107 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
108 if (local->scan_channel) {
109 chan = local->scan_channel;
110 /* If scanning on oper channel, use whatever channel-type
111 * is currently in use.
113 if (chan == local->_oper_channel)
114 channel_type = local->_oper_channel_type;
116 channel_type = NL80211_CHAN_NO_HT;
117 } else if (local->tmp_channel) {
118 chan = local->tmp_channel;
119 channel_type = NL80211_CHAN_NO_HT;
121 chan = local->_oper_channel;
122 channel_type = local->_oper_channel_type;
125 if (chan != local->_oper_channel ||
126 channel_type != local->_oper_channel_type)
127 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
129 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
131 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
133 if (offchannel_flag || chan != local->hw.conf.channel ||
134 channel_type != local->hw.conf.channel_type) {
135 local->hw.conf.channel = chan;
136 local->hw.conf.channel_type = channel_type;
137 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
140 if (!conf_is_ht(&local->hw.conf)) {
142 * mac80211.h documents that this is only valid
143 * when the channel is set to an HT type, and
144 * that otherwise STATIC is used.
146 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
147 } else if (local->hw.conf.smps_mode != local->smps_mode) {
148 local->hw.conf.smps_mode = local->smps_mode;
149 changed |= IEEE80211_CONF_CHANGE_SMPS;
152 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
153 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
154 test_bit(SCAN_HW_SCANNING, &local->scanning);
155 power = chan->max_power;
158 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
159 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
161 power = min(power, sdata->vif.bss_conf.txpower);
165 if (local->hw.conf.power_level != power) {
166 changed |= IEEE80211_CONF_CHANGE_POWER;
167 local->hw.conf.power_level = power;
173 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
179 if (!local->use_chanctx)
180 changed |= ieee80211_hw_conf_chan(local);
182 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
183 IEEE80211_CONF_CHANGE_POWER);
185 if (changed && local->open_count) {
186 ret = drv_config(local, changed);
189 * HW reconfiguration should never fail, the driver has told
190 * us what it can support so it should live up to that promise.
193 * rfkill is not integrated with mac80211 and a
194 * configuration command can thus fail if hardware rfkill
197 * FIXME: integrate rfkill with mac80211 and then add this
207 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
210 struct ieee80211_local *local = sdata->local;
215 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
218 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
220 sdata->vif.bss_conf.use_cts_prot = false;
221 sdata->vif.bss_conf.use_short_preamble = false;
222 sdata->vif.bss_conf.use_short_slot = false;
223 return BSS_CHANGED_ERP_CTS_PROT |
224 BSS_CHANGED_ERP_PREAMBLE |
225 BSS_CHANGED_ERP_SLOT;
228 static void ieee80211_tasklet_handler(unsigned long data)
230 struct ieee80211_local *local = (struct ieee80211_local *) data;
231 struct sta_info *sta, *tmp;
232 struct skb_eosp_msg_data *eosp_data;
235 while ((skb = skb_dequeue(&local->skb_queue)) ||
236 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
237 switch (skb->pkt_type) {
238 case IEEE80211_RX_MSG:
239 /* Clear skb->pkt_type in order to not confuse kernel
242 ieee80211_rx(&local->hw, skb);
244 case IEEE80211_TX_STATUS_MSG:
246 ieee80211_tx_status(&local->hw, skb);
248 case IEEE80211_EOSP_MSG:
249 eosp_data = (void *)skb->cb;
250 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
251 /* skip wrong virtual interface */
252 if (memcmp(eosp_data->iface,
253 sta->sdata->vif.addr, ETH_ALEN))
255 clear_sta_flag(sta, WLAN_STA_SP);
261 WARN(1, "mac80211: Packet is of unknown type %d\n",
269 static void ieee80211_restart_work(struct work_struct *work)
271 struct ieee80211_local *local =
272 container_of(work, struct ieee80211_local, restart_work);
274 /* wait for scan work complete */
275 flush_workqueue(local->workqueue);
277 mutex_lock(&local->mtx);
278 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
279 rcu_dereference_protected(local->sched_scan_sdata,
280 lockdep_is_held(&local->mtx)),
281 "%s called with hardware scan in progress\n", __func__);
282 mutex_unlock(&local->mtx);
285 ieee80211_scan_cancel(local);
286 ieee80211_reconfig(local);
290 void ieee80211_restart_hw(struct ieee80211_hw *hw)
292 struct ieee80211_local *local = hw_to_local(hw);
294 trace_api_restart_hw(local);
296 wiphy_info(hw->wiphy,
297 "Hardware restart was requested\n");
299 /* use this reason, ieee80211_reconfig will unblock it */
300 ieee80211_stop_queues_by_reason(hw,
301 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
304 * Stop all Rx during the reconfig. We don't want state changes
305 * or driver callbacks while this is in progress.
307 local->in_reconfig = true;
310 schedule_work(&local->restart_work);
312 EXPORT_SYMBOL(ieee80211_restart_hw);
315 static int ieee80211_ifa_changed(struct notifier_block *nb,
316 unsigned long data, void *arg)
318 struct in_ifaddr *ifa = arg;
319 struct ieee80211_local *local =
320 container_of(nb, struct ieee80211_local,
322 struct net_device *ndev = ifa->ifa_dev->dev;
323 struct wireless_dev *wdev = ndev->ieee80211_ptr;
324 struct in_device *idev;
325 struct ieee80211_sub_if_data *sdata;
326 struct ieee80211_bss_conf *bss_conf;
327 struct ieee80211_if_managed *ifmgd;
330 /* Make sure it's our interface that got changed */
334 if (wdev->wiphy != local->hw.wiphy)
337 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
338 bss_conf = &sdata->vif.bss_conf;
340 /* ARP filtering is only supported in managed mode */
341 if (sdata->vif.type != NL80211_IFTYPE_STATION)
344 idev = __in_dev_get_rtnl(sdata->dev);
348 ifmgd = &sdata->u.mgd;
349 mutex_lock(&ifmgd->mtx);
351 /* Copy the addresses to the bss_conf list */
352 ifa = idev->ifa_list;
354 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
355 bss_conf->arp_addr_list[c] = ifa->ifa_address;
360 bss_conf->arp_addr_cnt = c;
362 /* Configure driver only if associated (which also implies it is up) */
363 if (ifmgd->associated)
364 ieee80211_bss_info_change_notify(sdata,
365 BSS_CHANGED_ARP_FILTER);
367 mutex_unlock(&ifmgd->mtx);
373 #if IS_ENABLED(CONFIG_IPV6)
374 static int ieee80211_ifa6_changed(struct notifier_block *nb,
375 unsigned long data, void *arg)
377 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
378 struct inet6_dev *idev = ifa->idev;
379 struct net_device *ndev = ifa->idev->dev;
380 struct ieee80211_local *local =
381 container_of(nb, struct ieee80211_local, ifa6_notifier);
382 struct wireless_dev *wdev = ndev->ieee80211_ptr;
383 struct ieee80211_sub_if_data *sdata;
385 /* Make sure it's our interface that got changed */
386 if (!wdev || wdev->wiphy != local->hw.wiphy)
389 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
392 * For now only support station mode. This is mostly because
393 * doing AP would have to handle AP_VLAN in some way ...
395 if (sdata->vif.type != NL80211_IFTYPE_STATION)
398 drv_ipv6_addr_change(local, sdata, idev);
404 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
406 struct ieee80211_local *local =
407 container_of(napi, struct ieee80211_local, napi);
409 return local->ops->napi_poll(&local->hw, budget);
412 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
414 struct ieee80211_local *local = hw_to_local(hw);
416 napi_schedule(&local->napi);
418 EXPORT_SYMBOL(ieee80211_napi_schedule);
420 void ieee80211_napi_complete(struct ieee80211_hw *hw)
422 struct ieee80211_local *local = hw_to_local(hw);
424 napi_complete(&local->napi);
426 EXPORT_SYMBOL(ieee80211_napi_complete);
428 /* There isn't a lot of sense in it, but you can transmit anything you like */
429 static const struct ieee80211_txrx_stypes
430 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
431 [NL80211_IFTYPE_ADHOC] = {
433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
436 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
438 [NL80211_IFTYPE_STATION] = {
440 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
441 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
443 [NL80211_IFTYPE_AP] = {
445 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
446 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
447 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
448 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
449 BIT(IEEE80211_STYPE_AUTH >> 4) |
450 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
451 BIT(IEEE80211_STYPE_ACTION >> 4),
453 [NL80211_IFTYPE_AP_VLAN] = {
456 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
457 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
458 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
459 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
460 BIT(IEEE80211_STYPE_AUTH >> 4) |
461 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
462 BIT(IEEE80211_STYPE_ACTION >> 4),
464 [NL80211_IFTYPE_P2P_CLIENT] = {
466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
469 [NL80211_IFTYPE_P2P_GO] = {
471 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
472 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
473 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
474 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
475 BIT(IEEE80211_STYPE_AUTH >> 4) |
476 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
477 BIT(IEEE80211_STYPE_ACTION >> 4),
479 [NL80211_IFTYPE_MESH_POINT] = {
481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
482 BIT(IEEE80211_STYPE_AUTH >> 4) |
483 BIT(IEEE80211_STYPE_DEAUTH >> 4),
485 [NL80211_IFTYPE_P2P_DEVICE] = {
487 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
488 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
492 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
493 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
494 IEEE80211_HT_AMPDU_PARM_DENSITY,
496 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
497 IEEE80211_HT_CAP_MAX_AMSDU |
498 IEEE80211_HT_CAP_SGI_20 |
499 IEEE80211_HT_CAP_SGI_40),
501 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
502 0xff, 0xff, 0xff, 0xff, 0xff, },
506 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
507 const struct ieee80211_ops *ops)
509 struct ieee80211_local *local;
514 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
515 !ops->add_interface || !ops->remove_interface ||
516 !ops->configure_filter))
519 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
522 /* check all or no channel context operations exist */
523 i = !!ops->add_chanctx + !!ops->remove_chanctx +
524 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
525 !!ops->unassign_vif_chanctx;
526 if (WARN_ON(i != 0 && i != 5))
528 use_chanctx = i == 5;
530 /* Ensure 32-byte alignment of our private data and hw private data.
531 * We use the wiphy priv data for both our ieee80211_local and for
532 * the driver's private data
534 * In memory it'll be like this:
536 * +-------------------------+
538 * +-------------------------+
539 * | struct ieee80211_local |
540 * +-------------------------+
541 * | driver's private data |
542 * +-------------------------+
545 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
547 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
552 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
554 wiphy->privid = mac80211_wiphy_privid;
556 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
557 WIPHY_FLAG_4ADDR_AP |
558 WIPHY_FLAG_4ADDR_STATION |
559 WIPHY_FLAG_REPORTS_OBSS |
560 WIPHY_FLAG_OFFCHAN_TX;
562 if (ops->remain_on_channel)
563 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
565 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
566 NL80211_FEATURE_SAE |
567 NL80211_FEATURE_HT_IBSS |
568 NL80211_FEATURE_VIF_TXPOWER |
569 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
572 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
573 NL80211_FEATURE_AP_SCAN;
577 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
579 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
581 local = wiphy_priv(wiphy);
583 local->hw.wiphy = wiphy;
585 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
588 local->use_chanctx = use_chanctx;
590 /* set up some defaults */
591 local->hw.queues = 1;
592 local->hw.max_rates = 1;
593 local->hw.max_report_rates = 0;
594 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
595 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
596 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
597 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
598 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
599 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
600 IEEE80211_RADIOTAP_MCS_HAVE_GI |
601 IEEE80211_RADIOTAP_MCS_HAVE_BW;
602 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
603 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
604 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
605 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
607 INIT_LIST_HEAD(&local->interfaces);
609 __hw_addr_init(&local->mc_list);
611 mutex_init(&local->iflist_mtx);
612 mutex_init(&local->mtx);
614 mutex_init(&local->key_mtx);
615 spin_lock_init(&local->filter_lock);
616 spin_lock_init(&local->queue_stop_reason_lock);
618 INIT_LIST_HEAD(&local->chanctx_list);
619 mutex_init(&local->chanctx_mtx);
622 * The rx_skb_queue is only accessed from tasklets,
623 * but other SKB queues are used from within IRQ
624 * context. Therefore, this one needs a different
625 * locking class so our direct, non-irq-safe use of
626 * the queue's lock doesn't throw lockdep warnings.
628 skb_queue_head_init_class(&local->rx_skb_queue,
629 &ieee80211_rx_skb_queue_class);
631 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
633 INIT_WORK(&local->restart_work, ieee80211_restart_work);
635 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
636 local->smps_mode = IEEE80211_SMPS_OFF;
638 INIT_WORK(&local->dynamic_ps_enable_work,
639 ieee80211_dynamic_ps_enable_work);
640 INIT_WORK(&local->dynamic_ps_disable_work,
641 ieee80211_dynamic_ps_disable_work);
642 setup_timer(&local->dynamic_ps_timer,
643 ieee80211_dynamic_ps_timer, (unsigned long) local);
645 INIT_WORK(&local->sched_scan_stopped_work,
646 ieee80211_sched_scan_stopped_work);
648 spin_lock_init(&local->ack_status_lock);
649 idr_init(&local->ack_status_frames);
650 /* preallocate at least one entry */
651 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
653 sta_info_init(local);
655 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
656 skb_queue_head_init(&local->pending[i]);
657 atomic_set(&local->agg_queue_stop[i], 0);
659 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
660 (unsigned long)local);
662 tasklet_init(&local->tasklet,
663 ieee80211_tasklet_handler,
664 (unsigned long) local);
666 skb_queue_head_init(&local->skb_queue);
667 skb_queue_head_init(&local->skb_queue_unreliable);
669 /* init dummy netdev for use w/ NAPI */
670 init_dummy_netdev(&local->napi_dev);
672 ieee80211_led_names(local);
674 ieee80211_roc_setup(local);
678 EXPORT_SYMBOL(ieee80211_alloc_hw);
680 int ieee80211_register_hw(struct ieee80211_hw *hw)
682 struct ieee80211_local *local = hw_to_local(hw);
684 enum ieee80211_band band;
685 int channels, max_bitrates;
686 bool supp_ht, supp_vht;
687 netdev_features_t feature_whitelist;
688 static const u32 cipher_suites[] = {
689 /* keep WEP first, it may be removed below */
690 WLAN_CIPHER_SUITE_WEP40,
691 WLAN_CIPHER_SUITE_WEP104,
692 WLAN_CIPHER_SUITE_TKIP,
693 WLAN_CIPHER_SUITE_CCMP,
695 /* keep last -- depends on hw flags! */
696 WLAN_CIPHER_SUITE_AES_CMAC
699 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
700 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
701 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
705 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
706 (!local->ops->suspend || !local->ops->resume))
710 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
713 if (!local->use_chanctx) {
714 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
715 const struct ieee80211_iface_combination *comb;
717 comb = &local->hw.wiphy->iface_combinations[i];
719 if (comb->num_different_channels > 1)
724 * WDS is currently prohibited when channel contexts are used
725 * because there's no clear definition of which channel WDS
726 * type interfaces use
728 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
732 /* Only HW csum features are currently compatible with mac80211 */
733 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
735 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
738 if (hw->max_report_rates == 0)
739 hw->max_report_rates = hw->max_rates;
741 local->rx_chains = 1;
744 * generic code guarantees at least one band,
745 * set this very early because much code assumes
746 * that hw.conf.channel is assigned
752 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
753 struct ieee80211_supported_band *sband;
755 sband = local->hw.wiphy->bands[band];
758 if (!local->use_chanctx && !local->_oper_channel) {
759 /* init channel we're on */
760 local->hw.conf.channel =
761 local->_oper_channel = &sband->channels[0];
762 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
764 cfg80211_chandef_create(&local->monitor_chandef,
767 channels += sband->n_channels;
769 if (max_bitrates < sband->n_bitrates)
770 max_bitrates = sband->n_bitrates;
771 supp_ht = supp_ht || sband->ht_cap.ht_supported;
772 supp_vht = supp_vht || sband->vht_cap.vht_supported;
774 if (sband->ht_cap.ht_supported)
776 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
779 /* TODO: consider VHT for RX chains, hopefully it's the same */
782 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
783 sizeof(void *) * channels, GFP_KERNEL);
784 if (!local->int_scan_req)
787 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
788 if (!local->hw.wiphy->bands[band])
790 local->int_scan_req->rates[band] = (u32) -1;
793 /* if low-level driver supports AP, we also support VLAN */
794 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
795 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
796 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
799 /* mac80211 always supports monitor */
800 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
801 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
803 /* mac80211 doesn't support more than one IBSS interface right now */
804 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
805 const struct ieee80211_iface_combination *c;
808 c = &hw->wiphy->iface_combinations[i];
810 for (j = 0; j < c->n_limits; j++)
811 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
812 c->limits[j].max > 1)
816 #ifndef CONFIG_MAC80211_MESH
817 /* mesh depends on Kconfig, but drivers should set it if they want */
818 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
821 /* if the underlying driver supports mesh, mac80211 will (at least)
822 * provide routing of mesh authentication frames to userspace */
823 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
824 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
826 /* mac80211 supports control port protocol changing */
827 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
829 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
830 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
831 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
832 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
834 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
835 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
836 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
839 * Calculate scan IE length -- we need this to alloc
840 * memory and to subtract from the driver limit. It
841 * includes the DS Params, (extended) supported rates, and HT
842 * information -- SSID is the driver's responsibility.
844 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
847 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
850 local->scan_ies_len +=
851 2 + sizeof(struct ieee80211_vht_cap);
854 * (for now at least), drivers wanting to use VHT must
855 * support channel contexts, as they contain all the
856 * necessary VHT information and the global hw config
859 if (WARN_ON(!local->use_chanctx)) {
861 goto fail_wiphy_register;
865 if (!local->ops->hw_scan) {
866 /* For hw_scan, driver needs to set these up. */
867 local->hw.wiphy->max_scan_ssids = 4;
868 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
872 * If the driver supports any scan IEs, then assume the
873 * limit includes the IEs mac80211 will add, otherwise
874 * leave it at zero and let the driver sort it out; we
875 * still pass our IEs to the driver but userspace will
876 * not be allowed to in that case.
878 if (local->hw.wiphy->max_scan_ie_len)
879 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
881 /* Set up cipher suites unless driver already did */
882 if (!local->hw.wiphy->cipher_suites) {
883 local->hw.wiphy->cipher_suites = cipher_suites;
884 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
885 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
886 local->hw.wiphy->n_cipher_suites--;
888 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
889 if (local->hw.wiphy->cipher_suites == cipher_suites) {
890 local->hw.wiphy->cipher_suites += 2;
891 local->hw.wiphy->n_cipher_suites -= 2;
899 local->hw.wiphy->cipher_suites,
900 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
904 goto fail_wiphy_register;
906 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
907 u32 suite = local->hw.wiphy->cipher_suites[r];
908 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
909 suite == WLAN_CIPHER_SUITE_WEP104)
913 local->hw.wiphy->cipher_suites = suites;
914 local->hw.wiphy->n_cipher_suites = w;
915 local->wiphy_ciphers_allocated = true;
919 if (!local->ops->remain_on_channel)
920 local->hw.wiphy->max_remain_on_channel_duration = 5000;
922 if (local->ops->sched_scan_start)
923 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
925 /* mac80211 based drivers don't support internal TDLS setup */
926 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
927 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
929 result = wiphy_register(local->hw.wiphy);
931 goto fail_wiphy_register;
934 * We use the number of queues for feature tests (QoS, HT) internally
935 * so restrict them appropriately.
937 if (hw->queues > IEEE80211_MAX_QUEUES)
938 hw->queues = IEEE80211_MAX_QUEUES;
941 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
942 if (!local->workqueue) {
948 * The hardware needs headroom for sending the frame,
949 * and we need some headroom for passing the frame to monitor
950 * interfaces, but never both at the same time.
952 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
953 IEEE80211_TX_STATUS_HEADROOM);
955 debugfs_hw_add(local);
958 * if the driver doesn't specify a max listen interval we
959 * use 5 which should be a safe default
961 if (local->hw.max_listen_interval == 0)
962 local->hw.max_listen_interval = 5;
964 local->hw.conf.listen_interval = local->hw.max_listen_interval;
966 local->dynamic_ps_forced_timeout = -1;
968 result = ieee80211_wep_init(local);
970 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
973 ieee80211_led_init(local);
977 result = ieee80211_init_rate_ctrl_alg(local,
978 hw->rate_control_algorithm);
980 wiphy_debug(local->hw.wiphy,
981 "Failed to initialize rate control algorithm\n");
985 /* add one default STA interface if supported */
986 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
987 result = ieee80211_if_add(local, "wlan%d", NULL,
988 NL80211_IFTYPE_STATION, NULL);
990 wiphy_warn(local->hw.wiphy,
991 "Failed to add default virtual iface\n");
996 local->network_latency_notifier.notifier_call =
997 ieee80211_max_network_latency;
998 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
999 &local->network_latency_notifier);
1006 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1007 result = register_inetaddr_notifier(&local->ifa_notifier);
1012 #if IS_ENABLED(CONFIG_IPV6)
1013 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1014 result = register_inet6addr_notifier(&local->ifa6_notifier);
1019 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
1020 local->hw.napi_weight);
1024 #if IS_ENABLED(CONFIG_IPV6)
1027 unregister_inetaddr_notifier(&local->ifa_notifier);
1030 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1032 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1033 &local->network_latency_notifier);
1037 ieee80211_led_exit(local);
1038 ieee80211_remove_interfaces(local);
1041 ieee80211_wep_free(local);
1042 sta_info_stop(local);
1043 destroy_workqueue(local->workqueue);
1045 wiphy_unregister(local->hw.wiphy);
1046 fail_wiphy_register:
1047 if (local->wiphy_ciphers_allocated)
1048 kfree(local->hw.wiphy->cipher_suites);
1049 kfree(local->int_scan_req);
1052 EXPORT_SYMBOL(ieee80211_register_hw);
1054 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1056 struct ieee80211_local *local = hw_to_local(hw);
1058 tasklet_kill(&local->tx_pending_tasklet);
1059 tasklet_kill(&local->tasklet);
1061 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1062 &local->network_latency_notifier);
1064 unregister_inetaddr_notifier(&local->ifa_notifier);
1066 #if IS_ENABLED(CONFIG_IPV6)
1067 unregister_inet6addr_notifier(&local->ifa6_notifier);
1073 * At this point, interface list manipulations are fine
1074 * because the driver cannot be handing us frames any
1075 * more and the tasklet is killed.
1077 ieee80211_remove_interfaces(local);
1081 cancel_work_sync(&local->restart_work);
1082 cancel_work_sync(&local->reconfig_filter);
1084 ieee80211_clear_tx_pending(local);
1085 rate_control_deinitialize(local);
1087 if (skb_queue_len(&local->skb_queue) ||
1088 skb_queue_len(&local->skb_queue_unreliable))
1089 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1090 skb_queue_purge(&local->skb_queue);
1091 skb_queue_purge(&local->skb_queue_unreliable);
1092 skb_queue_purge(&local->rx_skb_queue);
1094 destroy_workqueue(local->workqueue);
1095 wiphy_unregister(local->hw.wiphy);
1096 sta_info_stop(local);
1097 ieee80211_wep_free(local);
1098 ieee80211_led_exit(local);
1099 kfree(local->int_scan_req);
1101 EXPORT_SYMBOL(ieee80211_unregister_hw);
1103 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1105 WARN_ONCE(1, "Have pending ack frames!\n");
1110 void ieee80211_free_hw(struct ieee80211_hw *hw)
1112 struct ieee80211_local *local = hw_to_local(hw);
1114 mutex_destroy(&local->iflist_mtx);
1115 mutex_destroy(&local->mtx);
1117 if (local->wiphy_ciphers_allocated)
1118 kfree(local->hw.wiphy->cipher_suites);
1120 idr_for_each(&local->ack_status_frames,
1121 ieee80211_free_ack_frame, NULL);
1122 idr_destroy(&local->ack_status_frames);
1124 wiphy_free(local->hw.wiphy);
1126 EXPORT_SYMBOL(ieee80211_free_hw);
1128 static int __init ieee80211_init(void)
1130 struct sk_buff *skb;
1133 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1134 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1135 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1137 ret = rc80211_minstrel_init();
1141 ret = rc80211_minstrel_ht_init();
1145 ret = rc80211_pid_init();
1149 ret = ieee80211_iface_init();
1157 rc80211_minstrel_ht_exit();
1159 rc80211_minstrel_exit();
1164 static void __exit ieee80211_exit(void)
1167 rc80211_minstrel_ht_exit();
1168 rc80211_minstrel_exit();
1173 ieee80211_iface_exit();
1179 subsys_initcall(ieee80211_init);
1180 module_exit(ieee80211_exit);
1182 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1183 MODULE_LICENSE("GPL");