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 void ieee80211_configure_filter(struct ieee80211_local *local)
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
43 if (atomic_read(&local->iff_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct *work)
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
92 ieee80211_configure_filter(local);
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 struct ieee80211_sub_if_data *sdata;
98 struct ieee80211_channel *chan;
101 enum nl80211_channel_type channel_type;
103 bool scanning = false;
105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
106 if (local->scan_channel) {
107 chan = local->scan_channel;
108 /* If scanning on oper channel, use whatever channel-type
109 * is currently in use.
111 if (chan == local->_oper_channel)
112 channel_type = local->_oper_channel_type;
114 channel_type = NL80211_CHAN_NO_HT;
115 } else if (local->tmp_channel) {
116 chan = local->tmp_channel;
117 channel_type = NL80211_CHAN_NO_HT;
119 chan = local->_oper_channel;
120 channel_type = local->_oper_channel_type;
123 if (chan != local->_oper_channel ||
124 channel_type != local->_oper_channel_type)
125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
131 if (offchannel_flag || chan != local->hw.conf.channel ||
132 channel_type != local->hw.conf.channel_type) {
133 local->hw.conf.channel = chan;
134 local->hw.conf.channel_type = channel_type;
135 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
138 if (!conf_is_ht(&local->hw.conf)) {
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
145 } else if (local->hw.conf.smps_mode != local->smps_mode) {
146 local->hw.conf.smps_mode = local->smps_mode;
147 changed |= IEEE80211_CONF_CHANGE_SMPS;
150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
152 test_bit(SCAN_HW_SCANNING, &local->scanning);
153 power = chan->max_power;
156 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
157 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
159 power = min(power, sdata->vif.bss_conf.txpower);
163 if (local->hw.conf.power_level != power) {
164 changed |= IEEE80211_CONF_CHANGE_POWER;
165 local->hw.conf.power_level = power;
171 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
177 if (!local->use_chanctx)
178 changed |= ieee80211_hw_conf_chan(local);
180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
181 IEEE80211_CONF_CHANGE_POWER);
183 if (changed && local->open_count) {
184 ret = drv_config(local, changed);
187 * HW reconfiguration should never fail, the driver has told
188 * us what it can support so it should live up to that promise.
191 * rfkill is not integrated with mac80211 and a
192 * configuration command can thus fail if hardware rfkill
195 * FIXME: integrate rfkill with mac80211 and then add this
205 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
208 struct ieee80211_local *local = sdata->local;
213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
216 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
218 sdata->vif.bss_conf.use_cts_prot = false;
219 sdata->vif.bss_conf.use_short_preamble = false;
220 sdata->vif.bss_conf.use_short_slot = false;
221 return BSS_CHANGED_ERP_CTS_PROT |
222 BSS_CHANGED_ERP_PREAMBLE |
223 BSS_CHANGED_ERP_SLOT;
226 static void ieee80211_tasklet_handler(unsigned long data)
228 struct ieee80211_local *local = (struct ieee80211_local *) data;
229 struct sta_info *sta, *tmp;
230 struct skb_eosp_msg_data *eosp_data;
233 while ((skb = skb_dequeue(&local->skb_queue)) ||
234 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
235 switch (skb->pkt_type) {
236 case IEEE80211_RX_MSG:
237 /* Clear skb->pkt_type in order to not confuse kernel
240 ieee80211_rx(&local->hw, skb);
242 case IEEE80211_TX_STATUS_MSG:
244 ieee80211_tx_status(&local->hw, skb);
246 case IEEE80211_EOSP_MSG:
247 eosp_data = (void *)skb->cb;
248 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
249 /* skip wrong virtual interface */
250 if (memcmp(eosp_data->iface,
251 sta->sdata->vif.addr, ETH_ALEN))
253 clear_sta_flag(sta, WLAN_STA_SP);
259 WARN(1, "mac80211: Packet is of unknown type %d\n",
267 static void ieee80211_restart_work(struct work_struct *work)
269 struct ieee80211_local *local =
270 container_of(work, struct ieee80211_local, restart_work);
272 /* wait for scan work complete */
273 flush_workqueue(local->workqueue);
275 mutex_lock(&local->mtx);
276 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
277 rcu_dereference_protected(local->sched_scan_sdata,
278 lockdep_is_held(&local->mtx)),
279 "%s called with hardware scan in progress\n", __func__);
280 mutex_unlock(&local->mtx);
283 ieee80211_scan_cancel(local);
284 ieee80211_reconfig(local);
288 void ieee80211_restart_hw(struct ieee80211_hw *hw)
290 struct ieee80211_local *local = hw_to_local(hw);
292 trace_api_restart_hw(local);
294 wiphy_info(hw->wiphy,
295 "Hardware restart was requested\n");
297 /* use this reason, ieee80211_reconfig will unblock it */
298 ieee80211_stop_queues_by_reason(hw,
299 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
302 * Stop all Rx during the reconfig. We don't want state changes
303 * or driver callbacks while this is in progress.
305 local->in_reconfig = true;
308 schedule_work(&local->restart_work);
310 EXPORT_SYMBOL(ieee80211_restart_hw);
313 static int ieee80211_ifa_changed(struct notifier_block *nb,
314 unsigned long data, void *arg)
316 struct in_ifaddr *ifa = arg;
317 struct ieee80211_local *local =
318 container_of(nb, struct ieee80211_local,
320 struct net_device *ndev = ifa->ifa_dev->dev;
321 struct wireless_dev *wdev = ndev->ieee80211_ptr;
322 struct in_device *idev;
323 struct ieee80211_sub_if_data *sdata;
324 struct ieee80211_bss_conf *bss_conf;
325 struct ieee80211_if_managed *ifmgd;
328 /* Make sure it's our interface that got changed */
332 if (wdev->wiphy != local->hw.wiphy)
335 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
336 bss_conf = &sdata->vif.bss_conf;
338 /* ARP filtering is only supported in managed mode */
339 if (sdata->vif.type != NL80211_IFTYPE_STATION)
342 idev = __in_dev_get_rtnl(sdata->dev);
346 ifmgd = &sdata->u.mgd;
347 mutex_lock(&ifmgd->mtx);
349 /* Copy the addresses to the bss_conf list */
350 ifa = idev->ifa_list;
352 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
353 bss_conf->arp_addr_list[c] = ifa->ifa_address;
358 bss_conf->arp_addr_cnt = c;
360 /* Configure driver only if associated (which also implies it is up) */
361 if (ifmgd->associated)
362 ieee80211_bss_info_change_notify(sdata,
363 BSS_CHANGED_ARP_FILTER);
365 mutex_unlock(&ifmgd->mtx);
371 #if IS_ENABLED(CONFIG_IPV6)
372 static int ieee80211_ifa6_changed(struct notifier_block *nb,
373 unsigned long data, void *arg)
375 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
376 struct inet6_dev *idev = ifa->idev;
377 struct net_device *ndev = ifa->idev->dev;
378 struct ieee80211_local *local =
379 container_of(nb, struct ieee80211_local, ifa6_notifier);
380 struct wireless_dev *wdev = ndev->ieee80211_ptr;
381 struct ieee80211_sub_if_data *sdata;
383 /* Make sure it's our interface that got changed */
384 if (!wdev || wdev->wiphy != local->hw.wiphy)
387 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
390 * For now only support station mode. This is mostly because
391 * doing AP would have to handle AP_VLAN in some way ...
393 if (sdata->vif.type != NL80211_IFTYPE_STATION)
396 drv_ipv6_addr_change(local, sdata, idev);
402 /* There isn't a lot of sense in it, but you can transmit anything you like */
403 static const struct ieee80211_txrx_stypes
404 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
405 [NL80211_IFTYPE_ADHOC] = {
407 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
408 BIT(IEEE80211_STYPE_AUTH >> 4) |
409 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
412 [NL80211_IFTYPE_STATION] = {
414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
417 [NL80211_IFTYPE_AP] = {
419 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
420 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
421 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
422 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
423 BIT(IEEE80211_STYPE_AUTH >> 4) |
424 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
425 BIT(IEEE80211_STYPE_ACTION >> 4),
427 [NL80211_IFTYPE_AP_VLAN] = {
430 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
431 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
432 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
433 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
436 BIT(IEEE80211_STYPE_ACTION >> 4),
438 [NL80211_IFTYPE_P2P_CLIENT] = {
440 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
441 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
443 [NL80211_IFTYPE_P2P_GO] = {
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_MESH_POINT] = {
455 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
456 BIT(IEEE80211_STYPE_AUTH >> 4) |
457 BIT(IEEE80211_STYPE_DEAUTH >> 4),
459 [NL80211_IFTYPE_P2P_DEVICE] = {
461 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
462 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
466 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
467 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
468 IEEE80211_HT_AMPDU_PARM_DENSITY,
470 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
471 IEEE80211_HT_CAP_MAX_AMSDU |
472 IEEE80211_HT_CAP_SGI_20 |
473 IEEE80211_HT_CAP_SGI_40),
475 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
476 0xff, 0xff, 0xff, 0xff, 0xff, },
480 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
482 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
483 IEEE80211_VHT_CAP_SHORT_GI_80 |
484 IEEE80211_VHT_CAP_SHORT_GI_160 |
485 IEEE80211_VHT_CAP_RXSTBC_1 |
486 IEEE80211_VHT_CAP_RXSTBC_2 |
487 IEEE80211_VHT_CAP_RXSTBC_3 |
488 IEEE80211_VHT_CAP_RXSTBC_4 |
489 IEEE80211_VHT_CAP_TXSTBC |
490 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
491 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
492 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
493 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
494 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
496 .rx_mcs_map = cpu_to_le16(~0),
497 .tx_mcs_map = cpu_to_le16(~0),
501 static const u8 extended_capabilities[] = {
503 WLAN_EXT_CAPA8_OPMODE_NOTIF,
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 wiphy->extended_capabilities = extended_capabilities;
563 wiphy->extended_capabilities_mask = extended_capabilities;
564 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
566 if (ops->remain_on_channel)
567 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
569 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
570 NL80211_FEATURE_SAE |
571 NL80211_FEATURE_HT_IBSS |
572 NL80211_FEATURE_VIF_TXPOWER |
573 NL80211_FEATURE_USERSPACE_MPM;
576 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
577 NL80211_FEATURE_AP_SCAN;
581 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
583 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
585 local = wiphy_priv(wiphy);
587 local->hw.wiphy = wiphy;
589 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
592 local->use_chanctx = use_chanctx;
594 /* set up some defaults */
595 local->hw.queues = 1;
596 local->hw.max_rates = 1;
597 local->hw.max_report_rates = 0;
598 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
599 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
600 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
601 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
602 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
603 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
604 IEEE80211_RADIOTAP_MCS_HAVE_GI |
605 IEEE80211_RADIOTAP_MCS_HAVE_BW;
606 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
607 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
608 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
609 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
610 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
612 INIT_LIST_HEAD(&local->interfaces);
614 __hw_addr_init(&local->mc_list);
616 mutex_init(&local->iflist_mtx);
617 mutex_init(&local->mtx);
619 mutex_init(&local->key_mtx);
620 spin_lock_init(&local->filter_lock);
621 spin_lock_init(&local->rx_path_lock);
622 spin_lock_init(&local->queue_stop_reason_lock);
624 INIT_LIST_HEAD(&local->chanctx_list);
625 mutex_init(&local->chanctx_mtx);
627 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
629 INIT_WORK(&local->restart_work, ieee80211_restart_work);
631 INIT_WORK(&local->radar_detected_work,
632 ieee80211_dfs_radar_detected_work);
634 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
635 local->smps_mode = IEEE80211_SMPS_OFF;
637 INIT_WORK(&local->dynamic_ps_enable_work,
638 ieee80211_dynamic_ps_enable_work);
639 INIT_WORK(&local->dynamic_ps_disable_work,
640 ieee80211_dynamic_ps_disable_work);
641 setup_timer(&local->dynamic_ps_timer,
642 ieee80211_dynamic_ps_timer, (unsigned long) local);
644 INIT_WORK(&local->sched_scan_stopped_work,
645 ieee80211_sched_scan_stopped_work);
647 spin_lock_init(&local->ack_status_lock);
648 idr_init(&local->ack_status_frames);
650 sta_info_init(local);
652 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
653 skb_queue_head_init(&local->pending[i]);
654 atomic_set(&local->agg_queue_stop[i], 0);
656 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
657 (unsigned long)local);
659 tasklet_init(&local->tasklet,
660 ieee80211_tasklet_handler,
661 (unsigned long) local);
663 skb_queue_head_init(&local->skb_queue);
664 skb_queue_head_init(&local->skb_queue_unreliable);
666 ieee80211_led_names(local);
668 ieee80211_roc_setup(local);
672 EXPORT_SYMBOL(ieee80211_alloc_hw);
674 int ieee80211_register_hw(struct ieee80211_hw *hw)
676 struct ieee80211_local *local = hw_to_local(hw);
678 enum ieee80211_band band;
679 int channels, max_bitrates;
680 bool supp_ht, supp_vht;
681 netdev_features_t feature_whitelist;
682 static const u32 cipher_suites[] = {
683 /* keep WEP first, it may be removed below */
684 WLAN_CIPHER_SUITE_WEP40,
685 WLAN_CIPHER_SUITE_WEP104,
686 WLAN_CIPHER_SUITE_TKIP,
687 WLAN_CIPHER_SUITE_CCMP,
689 /* keep last -- depends on hw flags! */
690 WLAN_CIPHER_SUITE_AES_CMAC
693 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
694 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
695 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
699 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
700 (!local->ops->suspend || !local->ops->resume))
704 if (!local->use_chanctx) {
705 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
706 const struct ieee80211_iface_combination *comb;
708 comb = &local->hw.wiphy->iface_combinations[i];
710 if (comb->num_different_channels > 1)
715 * WDS is currently prohibited when channel contexts are used
716 * because there's no clear definition of which channel WDS
717 * type interfaces use
719 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
722 /* DFS currently not supported with channel context drivers */
723 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
724 const struct ieee80211_iface_combination *comb;
726 comb = &local->hw.wiphy->iface_combinations[i];
728 if (comb->radar_detect_widths)
733 /* Only HW csum features are currently compatible with mac80211 */
734 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
736 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
739 if (hw->max_report_rates == 0)
740 hw->max_report_rates = hw->max_rates;
742 local->rx_chains = 1;
745 * generic code guarantees at least one band,
746 * set this very early because much code assumes
747 * that hw.conf.channel is assigned
753 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
754 struct ieee80211_supported_band *sband;
756 sband = local->hw.wiphy->bands[band];
759 if (!local->use_chanctx && !local->_oper_channel) {
760 /* init channel we're on */
761 local->hw.conf.channel =
762 local->_oper_channel = &sband->channels[0];
763 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
765 cfg80211_chandef_create(&local->monitor_chandef,
768 channels += sband->n_channels;
770 if (max_bitrates < sband->n_bitrates)
771 max_bitrates = sband->n_bitrates;
772 supp_ht = supp_ht || sband->ht_cap.ht_supported;
773 supp_vht = supp_vht || sband->vht_cap.vht_supported;
775 if (sband->ht_cap.ht_supported)
777 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
780 /* TODO: consider VHT for RX chains, hopefully it's the same */
783 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
784 sizeof(void *) * channels, GFP_KERNEL);
785 if (!local->int_scan_req)
788 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
789 if (!local->hw.wiphy->bands[band])
791 local->int_scan_req->rates[band] = (u32) -1;
794 /* if low-level driver supports AP, we also support VLAN */
795 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
796 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
797 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
800 /* mac80211 always supports monitor */
801 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
802 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
804 /* mac80211 doesn't support more than one IBSS interface right now */
805 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
806 const struct ieee80211_iface_combination *c;
809 c = &hw->wiphy->iface_combinations[i];
811 for (j = 0; j < c->n_limits; j++)
812 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
813 c->limits[j].max > 1)
817 #ifndef CONFIG_MAC80211_MESH
818 /* mesh depends on Kconfig, but drivers should set it if they want */
819 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
822 /* if the underlying driver supports mesh, mac80211 will (at least)
823 * provide routing of mesh authentication frames to userspace */
824 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
825 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
827 /* mac80211 supports control port protocol changing */
828 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
830 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
831 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
832 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
833 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
835 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
836 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
837 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
840 * Calculate scan IE length -- we need this to alloc
841 * memory and to subtract from the driver limit. It
842 * includes the DS Params, (extended) supported rates, and HT
843 * information -- SSID is the driver's responsibility.
845 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
848 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
851 local->scan_ies_len +=
852 2 + sizeof(struct ieee80211_vht_cap);
855 * (for now at least), drivers wanting to use VHT must
856 * support channel contexts, as they contain all the
857 * necessary VHT information and the global hw config
860 if (WARN_ON(!local->use_chanctx)) {
862 goto fail_wiphy_register;
866 if (!local->ops->hw_scan) {
867 /* For hw_scan, driver needs to set these up. */
868 local->hw.wiphy->max_scan_ssids = 4;
869 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
873 * If the driver supports any scan IEs, then assume the
874 * limit includes the IEs mac80211 will add, otherwise
875 * leave it at zero and let the driver sort it out; we
876 * still pass our IEs to the driver but userspace will
877 * not be allowed to in that case.
879 if (local->hw.wiphy->max_scan_ie_len)
880 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
882 /* Set up cipher suites unless driver already did */
883 if (!local->hw.wiphy->cipher_suites) {
884 local->hw.wiphy->cipher_suites = cipher_suites;
885 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
886 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
887 local->hw.wiphy->n_cipher_suites--;
889 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
890 if (local->hw.wiphy->cipher_suites == cipher_suites) {
891 local->hw.wiphy->cipher_suites += 2;
892 local->hw.wiphy->n_cipher_suites -= 2;
900 local->hw.wiphy->cipher_suites,
901 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
905 goto fail_wiphy_register;
907 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
908 u32 suite = local->hw.wiphy->cipher_suites[r];
909 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
910 suite == WLAN_CIPHER_SUITE_WEP104)
914 local->hw.wiphy->cipher_suites = suites;
915 local->hw.wiphy->n_cipher_suites = w;
916 local->wiphy_ciphers_allocated = true;
920 if (!local->ops->remain_on_channel)
921 local->hw.wiphy->max_remain_on_channel_duration = 5000;
923 if (local->ops->sched_scan_start)
924 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
926 /* mac80211 based drivers don't support internal TDLS setup */
927 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
928 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
930 result = wiphy_register(local->hw.wiphy);
932 goto fail_wiphy_register;
935 * We use the number of queues for feature tests (QoS, HT) internally
936 * so restrict them appropriately.
938 if (hw->queues > IEEE80211_MAX_QUEUES)
939 hw->queues = IEEE80211_MAX_QUEUES;
942 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
943 if (!local->workqueue) {
949 * The hardware needs headroom for sending the frame,
950 * and we need some headroom for passing the frame to monitor
951 * interfaces, but never both at the same time.
953 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
954 IEEE80211_TX_STATUS_HEADROOM);
956 debugfs_hw_add(local);
959 * if the driver doesn't specify a max listen interval we
960 * use 5 which should be a safe default
962 if (local->hw.max_listen_interval == 0)
963 local->hw.max_listen_interval = 5;
965 local->hw.conf.listen_interval = local->hw.max_listen_interval;
967 local->dynamic_ps_forced_timeout = -1;
969 result = ieee80211_wep_init(local);
971 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
974 ieee80211_led_init(local);
978 result = ieee80211_init_rate_ctrl_alg(local,
979 hw->rate_control_algorithm);
981 wiphy_debug(local->hw.wiphy,
982 "Failed to initialize rate control algorithm\n");
986 /* add one default STA interface if supported */
987 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
988 result = ieee80211_if_add(local, "wlan%d", NULL,
989 NL80211_IFTYPE_STATION, NULL);
991 wiphy_warn(local->hw.wiphy,
992 "Failed to add default virtual iface\n");
997 local->network_latency_notifier.notifier_call =
998 ieee80211_max_network_latency;
999 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1000 &local->network_latency_notifier);
1007 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1008 result = register_inetaddr_notifier(&local->ifa_notifier);
1013 #if IS_ENABLED(CONFIG_IPV6)
1014 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1015 result = register_inet6addr_notifier(&local->ifa6_notifier);
1022 #if IS_ENABLED(CONFIG_IPV6)
1025 unregister_inetaddr_notifier(&local->ifa_notifier);
1028 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1030 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1031 &local->network_latency_notifier);
1035 ieee80211_led_exit(local);
1036 ieee80211_remove_interfaces(local);
1039 ieee80211_wep_free(local);
1040 sta_info_stop(local);
1041 destroy_workqueue(local->workqueue);
1043 wiphy_unregister(local->hw.wiphy);
1044 fail_wiphy_register:
1045 if (local->wiphy_ciphers_allocated)
1046 kfree(local->hw.wiphy->cipher_suites);
1047 kfree(local->int_scan_req);
1050 EXPORT_SYMBOL(ieee80211_register_hw);
1052 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1054 struct ieee80211_local *local = hw_to_local(hw);
1056 tasklet_kill(&local->tx_pending_tasklet);
1057 tasklet_kill(&local->tasklet);
1059 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1060 &local->network_latency_notifier);
1062 unregister_inetaddr_notifier(&local->ifa_notifier);
1064 #if IS_ENABLED(CONFIG_IPV6)
1065 unregister_inet6addr_notifier(&local->ifa6_notifier);
1071 * At this point, interface list manipulations are fine
1072 * because the driver cannot be handing us frames any
1073 * more and the tasklet is killed.
1075 ieee80211_remove_interfaces(local);
1079 cancel_work_sync(&local->restart_work);
1080 cancel_work_sync(&local->reconfig_filter);
1082 ieee80211_clear_tx_pending(local);
1083 rate_control_deinitialize(local);
1085 if (skb_queue_len(&local->skb_queue) ||
1086 skb_queue_len(&local->skb_queue_unreliable))
1087 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1088 skb_queue_purge(&local->skb_queue);
1089 skb_queue_purge(&local->skb_queue_unreliable);
1091 destroy_workqueue(local->workqueue);
1092 wiphy_unregister(local->hw.wiphy);
1093 sta_info_stop(local);
1094 ieee80211_wep_free(local);
1095 ieee80211_led_exit(local);
1096 kfree(local->int_scan_req);
1098 EXPORT_SYMBOL(ieee80211_unregister_hw);
1100 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1102 WARN_ONCE(1, "Have pending ack frames!\n");
1107 void ieee80211_free_hw(struct ieee80211_hw *hw)
1109 struct ieee80211_local *local = hw_to_local(hw);
1111 mutex_destroy(&local->iflist_mtx);
1112 mutex_destroy(&local->mtx);
1114 if (local->wiphy_ciphers_allocated)
1115 kfree(local->hw.wiphy->cipher_suites);
1117 idr_for_each(&local->ack_status_frames,
1118 ieee80211_free_ack_frame, NULL);
1119 idr_destroy(&local->ack_status_frames);
1121 wiphy_free(local->hw.wiphy);
1123 EXPORT_SYMBOL(ieee80211_free_hw);
1125 static int __init ieee80211_init(void)
1127 struct sk_buff *skb;
1130 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1131 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1132 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1134 ret = rc80211_minstrel_init();
1138 ret = rc80211_minstrel_ht_init();
1142 ret = rc80211_pid_init();
1146 ret = ieee80211_iface_init();
1154 rc80211_minstrel_ht_exit();
1156 rc80211_minstrel_exit();
1161 static void __exit ieee80211_exit(void)
1164 rc80211_minstrel_ht_exit();
1165 rc80211_minstrel_exit();
1169 ieee80211_iface_exit();
1175 subsys_initcall(ieee80211_init);
1176 module_exit(ieee80211_exit);
1178 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1179 MODULE_LICENSE("GPL");