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 cfg80211_chan_def chandef = {};
103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105 if (local->scan_channel) {
106 chandef.chan = local->scan_channel;
107 /* If scanning on oper channel, use whatever channel-type
108 * is currently in use.
110 if (chandef.chan == local->_oper_chandef.chan) {
111 chandef = local->_oper_chandef;
113 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
114 chandef.center_freq1 = chandef.chan->center_freq;
116 } else if (local->tmp_channel) {
117 chandef.chan = local->tmp_channel;
118 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
119 chandef.center_freq1 = chandef.chan->center_freq;
121 chandef = local->_oper_chandef;
123 WARN(!cfg80211_chandef_valid(&chandef),
124 "control:%d MHz width:%d center: %d/%d MHz",
125 chandef.chan->center_freq, chandef.width,
126 chandef.center_freq1, chandef.center_freq2);
128 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
129 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
131 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
133 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
135 if (offchannel_flag ||
136 !cfg80211_chandef_identical(&local->hw.conf.chandef,
137 &local->_oper_chandef)) {
138 local->hw.conf.chandef = chandef;
139 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
142 if (!conf_is_ht(&local->hw.conf)) {
144 * mac80211.h documents that this is only valid
145 * when the channel is set to an HT type, and
146 * that otherwise STATIC is used.
148 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
149 } else if (local->hw.conf.smps_mode != local->smps_mode) {
150 local->hw.conf.smps_mode = local->smps_mode;
151 changed |= IEEE80211_CONF_CHANGE_SMPS;
154 power = chandef.chan->max_power;
157 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
158 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
160 power = min(power, sdata->vif.bss_conf.txpower);
164 if (local->hw.conf.power_level != power) {
165 changed |= IEEE80211_CONF_CHANGE_POWER;
166 local->hw.conf.power_level = power;
172 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
178 if (!local->use_chanctx)
179 changed |= ieee80211_hw_conf_chan(local);
181 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
182 IEEE80211_CONF_CHANGE_POWER);
184 if (changed && local->open_count) {
185 ret = drv_config(local, changed);
188 * HW reconfiguration should never fail, the driver has told
189 * us what it can support so it should live up to that promise.
192 * rfkill is not integrated with mac80211 and a
193 * configuration command can thus fail if hardware rfkill
196 * FIXME: integrate rfkill with mac80211 and then add this
206 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
209 struct ieee80211_local *local = sdata->local;
214 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
217 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
219 sdata->vif.bss_conf.use_cts_prot = false;
220 sdata->vif.bss_conf.use_short_preamble = false;
221 sdata->vif.bss_conf.use_short_slot = false;
222 return BSS_CHANGED_ERP_CTS_PROT |
223 BSS_CHANGED_ERP_PREAMBLE |
224 BSS_CHANGED_ERP_SLOT;
227 static void ieee80211_tasklet_handler(unsigned long data)
229 struct ieee80211_local *local = (struct ieee80211_local *) data;
232 while ((skb = skb_dequeue(&local->skb_queue)) ||
233 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
234 switch (skb->pkt_type) {
235 case IEEE80211_RX_MSG:
236 /* Clear skb->pkt_type in order to not confuse kernel
239 ieee80211_rx(&local->hw, skb);
241 case IEEE80211_TX_STATUS_MSG:
243 ieee80211_tx_status(&local->hw, skb);
246 WARN(1, "mac80211: Packet is of unknown type %d\n",
254 static void ieee80211_restart_work(struct work_struct *work)
256 struct ieee80211_local *local =
257 container_of(work, struct ieee80211_local, restart_work);
259 /* wait for scan work complete */
260 flush_workqueue(local->workqueue);
262 mutex_lock(&local->mtx);
263 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
264 rcu_dereference_protected(local->sched_scan_sdata,
265 lockdep_is_held(&local->mtx)),
266 "%s called with hardware scan in progress\n", __func__);
267 mutex_unlock(&local->mtx);
270 ieee80211_scan_cancel(local);
271 ieee80211_reconfig(local);
275 void ieee80211_restart_hw(struct ieee80211_hw *hw)
277 struct ieee80211_local *local = hw_to_local(hw);
279 trace_api_restart_hw(local);
281 wiphy_info(hw->wiphy,
282 "Hardware restart was requested\n");
284 /* use this reason, ieee80211_reconfig will unblock it */
285 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
286 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
289 * Stop all Rx during the reconfig. We don't want state changes
290 * or driver callbacks while this is in progress.
292 local->in_reconfig = true;
295 schedule_work(&local->restart_work);
297 EXPORT_SYMBOL(ieee80211_restart_hw);
300 static int ieee80211_ifa_changed(struct notifier_block *nb,
301 unsigned long data, void *arg)
303 struct in_ifaddr *ifa = arg;
304 struct ieee80211_local *local =
305 container_of(nb, struct ieee80211_local,
307 struct net_device *ndev = ifa->ifa_dev->dev;
308 struct wireless_dev *wdev = ndev->ieee80211_ptr;
309 struct in_device *idev;
310 struct ieee80211_sub_if_data *sdata;
311 struct ieee80211_bss_conf *bss_conf;
312 struct ieee80211_if_managed *ifmgd;
315 /* Make sure it's our interface that got changed */
319 if (wdev->wiphy != local->hw.wiphy)
322 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
323 bss_conf = &sdata->vif.bss_conf;
325 /* ARP filtering is only supported in managed mode */
326 if (sdata->vif.type != NL80211_IFTYPE_STATION)
329 idev = __in_dev_get_rtnl(sdata->dev);
333 ifmgd = &sdata->u.mgd;
334 mutex_lock(&ifmgd->mtx);
336 /* Copy the addresses to the bss_conf list */
337 ifa = idev->ifa_list;
339 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
340 bss_conf->arp_addr_list[c] = ifa->ifa_address;
345 bss_conf->arp_addr_cnt = c;
347 /* Configure driver only if associated (which also implies it is up) */
348 if (ifmgd->associated)
349 ieee80211_bss_info_change_notify(sdata,
350 BSS_CHANGED_ARP_FILTER);
352 mutex_unlock(&ifmgd->mtx);
358 #if IS_ENABLED(CONFIG_IPV6)
359 static int ieee80211_ifa6_changed(struct notifier_block *nb,
360 unsigned long data, void *arg)
362 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
363 struct inet6_dev *idev = ifa->idev;
364 struct net_device *ndev = ifa->idev->dev;
365 struct ieee80211_local *local =
366 container_of(nb, struct ieee80211_local, ifa6_notifier);
367 struct wireless_dev *wdev = ndev->ieee80211_ptr;
368 struct ieee80211_sub_if_data *sdata;
370 /* Make sure it's our interface that got changed */
371 if (!wdev || wdev->wiphy != local->hw.wiphy)
374 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
377 * For now only support station mode. This is mostly because
378 * doing AP would have to handle AP_VLAN in some way ...
380 if (sdata->vif.type != NL80211_IFTYPE_STATION)
383 drv_ipv6_addr_change(local, sdata, idev);
389 /* There isn't a lot of sense in it, but you can transmit anything you like */
390 static const struct ieee80211_txrx_stypes
391 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
392 [NL80211_IFTYPE_ADHOC] = {
394 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
395 BIT(IEEE80211_STYPE_AUTH >> 4) |
396 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
399 [NL80211_IFTYPE_STATION] = {
401 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
402 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
404 [NL80211_IFTYPE_AP] = {
406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
409 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
410 BIT(IEEE80211_STYPE_AUTH >> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412 BIT(IEEE80211_STYPE_ACTION >> 4),
414 [NL80211_IFTYPE_AP_VLAN] = {
417 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
418 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
420 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
421 BIT(IEEE80211_STYPE_AUTH >> 4) |
422 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
423 BIT(IEEE80211_STYPE_ACTION >> 4),
425 [NL80211_IFTYPE_P2P_CLIENT] = {
427 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
430 [NL80211_IFTYPE_P2P_GO] = {
432 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
433 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
434 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
435 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
436 BIT(IEEE80211_STYPE_AUTH >> 4) |
437 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
438 BIT(IEEE80211_STYPE_ACTION >> 4),
440 [NL80211_IFTYPE_MESH_POINT] = {
442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
443 BIT(IEEE80211_STYPE_AUTH >> 4) |
444 BIT(IEEE80211_STYPE_DEAUTH >> 4),
446 [NL80211_IFTYPE_P2P_DEVICE] = {
448 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
449 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
453 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
454 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
455 IEEE80211_HT_AMPDU_PARM_DENSITY,
457 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
458 IEEE80211_HT_CAP_MAX_AMSDU |
459 IEEE80211_HT_CAP_SGI_20 |
460 IEEE80211_HT_CAP_SGI_40),
462 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
463 0xff, 0xff, 0xff, 0xff, 0xff, },
467 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
469 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
470 IEEE80211_VHT_CAP_SHORT_GI_80 |
471 IEEE80211_VHT_CAP_SHORT_GI_160 |
472 IEEE80211_VHT_CAP_RXSTBC_1 |
473 IEEE80211_VHT_CAP_RXSTBC_2 |
474 IEEE80211_VHT_CAP_RXSTBC_3 |
475 IEEE80211_VHT_CAP_RXSTBC_4 |
476 IEEE80211_VHT_CAP_TXSTBC |
477 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
478 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
479 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
480 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
481 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
483 .rx_mcs_map = cpu_to_le16(~0),
484 .tx_mcs_map = cpu_to_le16(~0),
488 static const u8 extended_capabilities[] = {
490 WLAN_EXT_CAPA8_OPMODE_NOTIF,
493 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
494 const struct ieee80211_ops *ops)
496 struct ieee80211_local *local;
501 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
502 !ops->add_interface || !ops->remove_interface ||
503 !ops->configure_filter))
506 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
509 /* check all or no channel context operations exist */
510 i = !!ops->add_chanctx + !!ops->remove_chanctx +
511 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
512 !!ops->unassign_vif_chanctx;
513 if (WARN_ON(i != 0 && i != 5))
515 use_chanctx = i == 5;
517 /* Ensure 32-byte alignment of our private data and hw private data.
518 * We use the wiphy priv data for both our ieee80211_local and for
519 * the driver's private data
521 * In memory it'll be like this:
523 * +-------------------------+
525 * +-------------------------+
526 * | struct ieee80211_local |
527 * +-------------------------+
528 * | driver's private data |
529 * +-------------------------+
532 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
534 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
539 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
541 wiphy->privid = mac80211_wiphy_privid;
543 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
544 WIPHY_FLAG_4ADDR_AP |
545 WIPHY_FLAG_4ADDR_STATION |
546 WIPHY_FLAG_REPORTS_OBSS |
547 WIPHY_FLAG_OFFCHAN_TX;
549 wiphy->extended_capabilities = extended_capabilities;
550 wiphy->extended_capabilities_mask = extended_capabilities;
551 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
553 if (ops->remain_on_channel)
554 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
556 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
557 NL80211_FEATURE_SAE |
558 NL80211_FEATURE_HT_IBSS |
559 NL80211_FEATURE_VIF_TXPOWER |
560 NL80211_FEATURE_USERSPACE_MPM;
563 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
564 NL80211_FEATURE_AP_SCAN;
568 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
570 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
572 local = wiphy_priv(wiphy);
574 local->hw.wiphy = wiphy;
576 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
579 local->use_chanctx = use_chanctx;
581 /* set up some defaults */
582 local->hw.queues = 1;
583 local->hw.max_rates = 1;
584 local->hw.max_report_rates = 0;
585 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
586 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
587 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
588 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
589 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
590 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
591 IEEE80211_RADIOTAP_MCS_HAVE_GI |
592 IEEE80211_RADIOTAP_MCS_HAVE_BW;
593 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
594 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
595 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
596 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
597 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
598 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
599 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
601 INIT_LIST_HEAD(&local->interfaces);
603 __hw_addr_init(&local->mc_list);
605 mutex_init(&local->iflist_mtx);
606 mutex_init(&local->mtx);
608 mutex_init(&local->key_mtx);
609 spin_lock_init(&local->filter_lock);
610 spin_lock_init(&local->rx_path_lock);
611 spin_lock_init(&local->queue_stop_reason_lock);
613 INIT_LIST_HEAD(&local->chanctx_list);
614 mutex_init(&local->chanctx_mtx);
616 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
618 INIT_WORK(&local->restart_work, ieee80211_restart_work);
620 INIT_WORK(&local->radar_detected_work,
621 ieee80211_dfs_radar_detected_work);
623 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
624 local->smps_mode = IEEE80211_SMPS_OFF;
626 INIT_WORK(&local->dynamic_ps_enable_work,
627 ieee80211_dynamic_ps_enable_work);
628 INIT_WORK(&local->dynamic_ps_disable_work,
629 ieee80211_dynamic_ps_disable_work);
630 setup_timer(&local->dynamic_ps_timer,
631 ieee80211_dynamic_ps_timer, (unsigned long) local);
633 INIT_WORK(&local->sched_scan_stopped_work,
634 ieee80211_sched_scan_stopped_work);
636 spin_lock_init(&local->ack_status_lock);
637 idr_init(&local->ack_status_frames);
639 sta_info_init(local);
641 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
642 skb_queue_head_init(&local->pending[i]);
643 atomic_set(&local->agg_queue_stop[i], 0);
645 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
646 (unsigned long)local);
648 tasklet_init(&local->tasklet,
649 ieee80211_tasklet_handler,
650 (unsigned long) local);
652 skb_queue_head_init(&local->skb_queue);
653 skb_queue_head_init(&local->skb_queue_unreliable);
655 ieee80211_led_names(local);
657 ieee80211_roc_setup(local);
661 EXPORT_SYMBOL(ieee80211_alloc_hw);
663 int ieee80211_register_hw(struct ieee80211_hw *hw)
665 struct ieee80211_local *local = hw_to_local(hw);
667 enum ieee80211_band band;
668 int channels, max_bitrates;
669 bool supp_ht, supp_vht;
670 netdev_features_t feature_whitelist;
671 static const u32 cipher_suites[] = {
672 /* keep WEP first, it may be removed below */
673 WLAN_CIPHER_SUITE_WEP40,
674 WLAN_CIPHER_SUITE_WEP104,
675 WLAN_CIPHER_SUITE_TKIP,
676 WLAN_CIPHER_SUITE_CCMP,
678 /* keep last -- depends on hw flags! */
679 WLAN_CIPHER_SUITE_AES_CMAC
682 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
683 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
684 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
688 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
689 (!local->ops->suspend || !local->ops->resume))
693 if (!local->use_chanctx) {
694 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
695 const struct ieee80211_iface_combination *comb;
697 comb = &local->hw.wiphy->iface_combinations[i];
699 if (comb->num_different_channels > 1)
704 * WDS is currently prohibited when channel contexts are used
705 * because there's no clear definition of which channel WDS
706 * type interfaces use
708 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
711 /* DFS currently not supported with channel context drivers */
712 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
713 const struct ieee80211_iface_combination *comb;
715 comb = &local->hw.wiphy->iface_combinations[i];
717 if (comb->radar_detect_widths)
722 /* Only HW csum features are currently compatible with mac80211 */
723 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
725 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
728 if (hw->max_report_rates == 0)
729 hw->max_report_rates = hw->max_rates;
731 local->rx_chains = 1;
734 * generic code guarantees at least one band,
735 * set this very early because much code assumes
736 * that hw.conf.channel is assigned
742 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
743 struct ieee80211_supported_band *sband;
745 sband = local->hw.wiphy->bands[band];
748 if (!local->use_chanctx && !local->_oper_chandef.chan) {
749 /* init channel we're on */
750 struct cfg80211_chan_def chandef = {
751 .chan = &sband->channels[0],
752 .width = NL80211_CHAN_NO_HT,
753 .center_freq1 = sband->channels[0].center_freq,
756 local->hw.conf.chandef = local->_oper_chandef = chandef;
758 cfg80211_chandef_create(&local->monitor_chandef,
761 channels += sband->n_channels;
763 if (max_bitrates < sband->n_bitrates)
764 max_bitrates = sband->n_bitrates;
765 supp_ht = supp_ht || sband->ht_cap.ht_supported;
766 supp_vht = supp_vht || sband->vht_cap.vht_supported;
768 if (sband->ht_cap.ht_supported)
770 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
773 /* TODO: consider VHT for RX chains, hopefully it's the same */
776 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
777 sizeof(void *) * channels, GFP_KERNEL);
778 if (!local->int_scan_req)
781 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
782 if (!local->hw.wiphy->bands[band])
784 local->int_scan_req->rates[band] = (u32) -1;
787 /* if low-level driver supports AP, we also support VLAN */
788 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
789 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
790 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
793 /* mac80211 always supports monitor */
794 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
795 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
797 /* mac80211 doesn't support more than one IBSS interface right now */
798 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
799 const struct ieee80211_iface_combination *c;
802 c = &hw->wiphy->iface_combinations[i];
804 for (j = 0; j < c->n_limits; j++)
805 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
806 c->limits[j].max > 1)
810 #ifndef CONFIG_MAC80211_MESH
811 /* mesh depends on Kconfig, but drivers should set it if they want */
812 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
815 /* if the underlying driver supports mesh, mac80211 will (at least)
816 * provide routing of mesh authentication frames to userspace */
817 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
818 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
820 /* mac80211 supports control port protocol changing */
821 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
823 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
824 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
825 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
826 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
828 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
829 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
830 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
833 * Calculate scan IE length -- we need this to alloc
834 * memory and to subtract from the driver limit. It
835 * includes the DS Params, (extended) supported rates, and HT
836 * information -- SSID is the driver's responsibility.
838 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
841 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
844 local->scan_ies_len +=
845 2 + sizeof(struct ieee80211_vht_cap);
848 * (for now at least), drivers wanting to use VHT must
849 * support channel contexts, as they contain all the
850 * necessary VHT information and the global hw config
853 if (WARN_ON(!local->use_chanctx)) {
855 goto fail_wiphy_register;
859 if (!local->ops->hw_scan) {
860 /* For hw_scan, driver needs to set these up. */
861 local->hw.wiphy->max_scan_ssids = 4;
862 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
866 * If the driver supports any scan IEs, then assume the
867 * limit includes the IEs mac80211 will add, otherwise
868 * leave it at zero and let the driver sort it out; we
869 * still pass our IEs to the driver but userspace will
870 * not be allowed to in that case.
872 if (local->hw.wiphy->max_scan_ie_len)
873 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
875 /* Set up cipher suites unless driver already did */
876 if (!local->hw.wiphy->cipher_suites) {
877 local->hw.wiphy->cipher_suites = cipher_suites;
878 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
879 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
880 local->hw.wiphy->n_cipher_suites--;
882 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
883 if (local->hw.wiphy->cipher_suites == cipher_suites) {
884 local->hw.wiphy->cipher_suites += 2;
885 local->hw.wiphy->n_cipher_suites -= 2;
893 local->hw.wiphy->cipher_suites,
894 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
898 goto fail_wiphy_register;
900 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
901 u32 suite = local->hw.wiphy->cipher_suites[r];
902 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
903 suite == WLAN_CIPHER_SUITE_WEP104)
907 local->hw.wiphy->cipher_suites = suites;
908 local->hw.wiphy->n_cipher_suites = w;
909 local->wiphy_ciphers_allocated = true;
913 if (!local->ops->remain_on_channel)
914 local->hw.wiphy->max_remain_on_channel_duration = 5000;
916 if (local->ops->sched_scan_start)
917 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
919 /* mac80211 based drivers don't support internal TDLS setup */
920 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
921 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
923 result = wiphy_register(local->hw.wiphy);
925 goto fail_wiphy_register;
928 * We use the number of queues for feature tests (QoS, HT) internally
929 * so restrict them appropriately.
931 if (hw->queues > IEEE80211_MAX_QUEUES)
932 hw->queues = IEEE80211_MAX_QUEUES;
935 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
936 if (!local->workqueue) {
942 * The hardware needs headroom for sending the frame,
943 * and we need some headroom for passing the frame to monitor
944 * interfaces, but never both at the same time.
946 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
947 IEEE80211_TX_STATUS_HEADROOM);
949 debugfs_hw_add(local);
952 * if the driver doesn't specify a max listen interval we
953 * use 5 which should be a safe default
955 if (local->hw.max_listen_interval == 0)
956 local->hw.max_listen_interval = 5;
958 local->hw.conf.listen_interval = local->hw.max_listen_interval;
960 local->dynamic_ps_forced_timeout = -1;
962 result = ieee80211_wep_init(local);
964 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
967 ieee80211_led_init(local);
971 result = ieee80211_init_rate_ctrl_alg(local,
972 hw->rate_control_algorithm);
974 wiphy_debug(local->hw.wiphy,
975 "Failed to initialize rate control algorithm\n");
979 /* add one default STA interface if supported */
980 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
981 result = ieee80211_if_add(local, "wlan%d", NULL,
982 NL80211_IFTYPE_STATION, NULL);
984 wiphy_warn(local->hw.wiphy,
985 "Failed to add default virtual iface\n");
990 local->network_latency_notifier.notifier_call =
991 ieee80211_max_network_latency;
992 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
993 &local->network_latency_notifier);
1000 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1001 result = register_inetaddr_notifier(&local->ifa_notifier);
1006 #if IS_ENABLED(CONFIG_IPV6)
1007 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1008 result = register_inet6addr_notifier(&local->ifa6_notifier);
1015 #if IS_ENABLED(CONFIG_IPV6)
1018 unregister_inetaddr_notifier(&local->ifa_notifier);
1021 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1023 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1024 &local->network_latency_notifier);
1028 ieee80211_led_exit(local);
1029 ieee80211_remove_interfaces(local);
1032 ieee80211_wep_free(local);
1033 sta_info_stop(local);
1034 destroy_workqueue(local->workqueue);
1036 wiphy_unregister(local->hw.wiphy);
1037 fail_wiphy_register:
1038 if (local->wiphy_ciphers_allocated)
1039 kfree(local->hw.wiphy->cipher_suites);
1040 kfree(local->int_scan_req);
1043 EXPORT_SYMBOL(ieee80211_register_hw);
1045 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1047 struct ieee80211_local *local = hw_to_local(hw);
1049 tasklet_kill(&local->tx_pending_tasklet);
1050 tasklet_kill(&local->tasklet);
1052 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1053 &local->network_latency_notifier);
1055 unregister_inetaddr_notifier(&local->ifa_notifier);
1057 #if IS_ENABLED(CONFIG_IPV6)
1058 unregister_inet6addr_notifier(&local->ifa6_notifier);
1064 * At this point, interface list manipulations are fine
1065 * because the driver cannot be handing us frames any
1066 * more and the tasklet is killed.
1068 ieee80211_remove_interfaces(local);
1072 cancel_work_sync(&local->restart_work);
1073 cancel_work_sync(&local->reconfig_filter);
1075 ieee80211_clear_tx_pending(local);
1076 rate_control_deinitialize(local);
1078 if (skb_queue_len(&local->skb_queue) ||
1079 skb_queue_len(&local->skb_queue_unreliable))
1080 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1081 skb_queue_purge(&local->skb_queue);
1082 skb_queue_purge(&local->skb_queue_unreliable);
1084 destroy_workqueue(local->workqueue);
1085 wiphy_unregister(local->hw.wiphy);
1086 sta_info_stop(local);
1087 ieee80211_wep_free(local);
1088 ieee80211_led_exit(local);
1089 kfree(local->int_scan_req);
1091 EXPORT_SYMBOL(ieee80211_unregister_hw);
1093 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1095 WARN_ONCE(1, "Have pending ack frames!\n");
1100 void ieee80211_free_hw(struct ieee80211_hw *hw)
1102 struct ieee80211_local *local = hw_to_local(hw);
1104 mutex_destroy(&local->iflist_mtx);
1105 mutex_destroy(&local->mtx);
1107 if (local->wiphy_ciphers_allocated)
1108 kfree(local->hw.wiphy->cipher_suites);
1110 idr_for_each(&local->ack_status_frames,
1111 ieee80211_free_ack_frame, NULL);
1112 idr_destroy(&local->ack_status_frames);
1114 wiphy_free(local->hw.wiphy);
1116 EXPORT_SYMBOL(ieee80211_free_hw);
1118 static int __init ieee80211_init(void)
1120 struct sk_buff *skb;
1123 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1124 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1125 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1127 ret = rc80211_minstrel_init();
1131 ret = rc80211_minstrel_ht_init();
1135 ret = rc80211_pid_init();
1139 ret = ieee80211_iface_init();
1147 rc80211_minstrel_ht_exit();
1149 rc80211_minstrel_exit();
1154 static void __exit ieee80211_exit(void)
1157 rc80211_minstrel_ht_exit();
1158 rc80211_minstrel_exit();
1162 ieee80211_iface_exit();
1168 subsys_initcall(ieee80211_init);
1169 module_exit(ieee80211_exit);
1171 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1172 MODULE_LICENSE("GPL");