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>
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
36 static struct lock_class_key ieee80211_rx_skb_queue_class;
38 void ieee80211_configure_filter(struct ieee80211_local *local)
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
44 if (atomic_read(&local->iff_promiscs))
45 new_flags |= FIF_PROMISC_IN_BSS;
47 if (atomic_read(&local->iff_allmultis))
48 new_flags |= FIF_ALLMULTI;
50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
51 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
52 new_flags |= FIF_BCN_PRBRESP_PROMISC;
54 if (local->fif_probe_req || local->probe_req_reg)
55 new_flags |= FIF_PROBE_REQ;
57 if (local->fif_fcsfail)
58 new_flags |= FIF_FCSFAIL;
60 if (local->fif_plcpfail)
61 new_flags |= FIF_PLCPFAIL;
63 if (local->fif_control)
64 new_flags |= FIF_CONTROL;
66 if (local->fif_other_bss)
67 new_flags |= FIF_OTHER_BSS;
69 if (local->fif_pspoll)
70 new_flags |= FIF_PSPOLL;
72 spin_lock_bh(&local->filter_lock);
73 changed_flags = local->filter_flags ^ new_flags;
75 mc = drv_prepare_multicast(local, &local->mc_list);
76 spin_unlock_bh(&local->filter_lock);
81 drv_configure_filter(local, changed_flags, &new_flags, mc);
83 WARN_ON(new_flags & (1<<31));
85 local->filter_flags = new_flags & ~(1<<31);
88 static void ieee80211_reconfig_filter(struct work_struct *work)
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
93 ieee80211_configure_filter(local);
96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
98 struct ieee80211_sub_if_data *sdata;
99 struct ieee80211_channel *chan;
102 enum nl80211_channel_type channel_type;
104 bool scanning = false;
106 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
107 if (local->scan_channel) {
108 chan = local->scan_channel;
109 /* If scanning on oper channel, use whatever channel-type
110 * is currently in use.
112 if (chan == local->_oper_channel)
113 channel_type = local->_oper_channel_type;
115 channel_type = NL80211_CHAN_NO_HT;
116 } else if (local->tmp_channel) {
117 chan = local->tmp_channel;
118 channel_type = NL80211_CHAN_NO_HT;
120 chan = local->_oper_channel;
121 channel_type = local->_oper_channel_type;
124 if (chan != local->_oper_channel ||
125 channel_type != local->_oper_channel_type)
126 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
128 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
130 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
132 if (offchannel_flag || chan != local->hw.conf.channel ||
133 channel_type != local->hw.conf.channel_type) {
134 local->hw.conf.channel = chan;
135 local->hw.conf.channel_type = channel_type;
136 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
139 if (!conf_is_ht(&local->hw.conf)) {
141 * mac80211.h documents that this is only valid
142 * when the channel is set to an HT type, and
143 * that otherwise STATIC is used.
145 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
146 } else if (local->hw.conf.smps_mode != local->smps_mode) {
147 local->hw.conf.smps_mode = local->smps_mode;
148 changed |= IEEE80211_CONF_CHANGE_SMPS;
151 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
152 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
153 test_bit(SCAN_HW_SCANNING, &local->scanning);
154 power = 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;
230 struct sta_info *sta, *tmp;
231 struct skb_eosp_msg_data *eosp_data;
234 while ((skb = skb_dequeue(&local->skb_queue)) ||
235 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
236 switch (skb->pkt_type) {
237 case IEEE80211_RX_MSG:
238 /* Clear skb->pkt_type in order to not confuse kernel
241 ieee80211_rx(&local->hw, skb);
243 case IEEE80211_TX_STATUS_MSG:
245 ieee80211_tx_status(&local->hw, skb);
247 case IEEE80211_EOSP_MSG:
248 eosp_data = (void *)skb->cb;
249 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
250 /* skip wrong virtual interface */
251 if (memcmp(eosp_data->iface,
252 sta->sdata->vif.addr, ETH_ALEN))
254 clear_sta_flag(sta, WLAN_STA_SP);
260 WARN(1, "mac80211: Packet is of unknown type %d\n",
268 static void ieee80211_restart_work(struct work_struct *work)
270 struct ieee80211_local *local =
271 container_of(work, struct ieee80211_local, restart_work);
273 /* wait for scan work complete */
274 flush_workqueue(local->workqueue);
276 mutex_lock(&local->mtx);
277 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
278 rcu_dereference_protected(local->sched_scan_sdata,
279 lockdep_is_held(&local->mtx)),
280 "%s called with hardware scan in progress\n", __func__);
281 mutex_unlock(&local->mtx);
284 ieee80211_scan_cancel(local);
285 ieee80211_reconfig(local);
289 void ieee80211_restart_hw(struct ieee80211_hw *hw)
291 struct ieee80211_local *local = hw_to_local(hw);
293 trace_api_restart_hw(local);
295 wiphy_info(hw->wiphy,
296 "Hardware restart was requested\n");
298 /* use this reason, ieee80211_reconfig will unblock it */
299 ieee80211_stop_queues_by_reason(hw,
300 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
303 * Stop all Rx during the reconfig. We don't want state changes
304 * or driver callbacks while this is in progress.
306 local->in_reconfig = true;
309 schedule_work(&local->restart_work);
311 EXPORT_SYMBOL(ieee80211_restart_hw);
314 static int ieee80211_ifa_changed(struct notifier_block *nb,
315 unsigned long data, void *arg)
317 struct in_ifaddr *ifa = arg;
318 struct ieee80211_local *local =
319 container_of(nb, struct ieee80211_local,
321 struct net_device *ndev = ifa->ifa_dev->dev;
322 struct wireless_dev *wdev = ndev->ieee80211_ptr;
323 struct in_device *idev;
324 struct ieee80211_sub_if_data *sdata;
325 struct ieee80211_bss_conf *bss_conf;
326 struct ieee80211_if_managed *ifmgd;
329 /* Make sure it's our interface that got changed */
333 if (wdev->wiphy != local->hw.wiphy)
336 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
337 bss_conf = &sdata->vif.bss_conf;
339 /* ARP filtering is only supported in managed mode */
340 if (sdata->vif.type != NL80211_IFTYPE_STATION)
343 idev = __in_dev_get_rtnl(sdata->dev);
347 ifmgd = &sdata->u.mgd;
348 mutex_lock(&ifmgd->mtx);
350 /* Copy the addresses to the bss_conf list */
351 ifa = idev->ifa_list;
352 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
353 bss_conf->arp_addr_list[c] = ifa->ifa_address;
358 /* If not all addresses fit the list, disable filtering */
360 sdata->arp_filter_state = false;
363 sdata->arp_filter_state = true;
365 bss_conf->arp_addr_cnt = c;
367 /* Configure driver only if associated (which also implies it is up) */
368 if (ifmgd->associated) {
369 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
370 ieee80211_bss_info_change_notify(sdata,
371 BSS_CHANGED_ARP_FILTER);
374 mutex_unlock(&ifmgd->mtx);
380 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
382 struct ieee80211_local *local =
383 container_of(napi, struct ieee80211_local, napi);
385 return local->ops->napi_poll(&local->hw, budget);
388 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
390 struct ieee80211_local *local = hw_to_local(hw);
392 napi_schedule(&local->napi);
394 EXPORT_SYMBOL(ieee80211_napi_schedule);
396 void ieee80211_napi_complete(struct ieee80211_hw *hw)
398 struct ieee80211_local *local = hw_to_local(hw);
400 napi_complete(&local->napi);
402 EXPORT_SYMBOL(ieee80211_napi_complete);
404 /* There isn't a lot of sense in it, but you can transmit anything you like */
405 static const struct ieee80211_txrx_stypes
406 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
407 [NL80211_IFTYPE_ADHOC] = {
409 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
410 BIT(IEEE80211_STYPE_AUTH >> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
414 [NL80211_IFTYPE_STATION] = {
416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
419 [NL80211_IFTYPE_AP] = {
421 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
424 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
425 BIT(IEEE80211_STYPE_AUTH >> 4) |
426 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
427 BIT(IEEE80211_STYPE_ACTION >> 4),
429 [NL80211_IFTYPE_AP_VLAN] = {
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_P2P_CLIENT] = {
442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
443 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
445 [NL80211_IFTYPE_P2P_GO] = {
447 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
448 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
449 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
450 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
451 BIT(IEEE80211_STYPE_AUTH >> 4) |
452 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
453 BIT(IEEE80211_STYPE_ACTION >> 4),
455 [NL80211_IFTYPE_MESH_POINT] = {
457 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
458 BIT(IEEE80211_STYPE_AUTH >> 4) |
459 BIT(IEEE80211_STYPE_DEAUTH >> 4),
461 [NL80211_IFTYPE_P2P_DEVICE] = {
463 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
464 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
468 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
469 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
470 IEEE80211_HT_AMPDU_PARM_DENSITY,
472 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
473 IEEE80211_HT_CAP_MAX_AMSDU |
474 IEEE80211_HT_CAP_SGI_20 |
475 IEEE80211_HT_CAP_SGI_40),
477 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
478 0xff, 0xff, 0xff, 0xff, 0xff, },
482 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
483 const struct ieee80211_ops *ops)
485 struct ieee80211_local *local;
490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
491 !ops->add_interface || !ops->remove_interface ||
492 !ops->configure_filter))
495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
498 /* check all or no channel context operations exist */
499 i = !!ops->add_chanctx + !!ops->remove_chanctx +
500 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
501 !!ops->unassign_vif_chanctx;
502 if (WARN_ON(i != 0 && i != 5))
504 use_chanctx = i == 5;
506 /* Ensure 32-byte alignment of our private data and hw private data.
507 * We use the wiphy priv data for both our ieee80211_local and for
508 * the driver's private data
510 * In memory it'll be like this:
512 * +-------------------------+
514 * +-------------------------+
515 * | struct ieee80211_local |
516 * +-------------------------+
517 * | driver's private data |
518 * +-------------------------+
521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
523 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
530 wiphy->privid = mac80211_wiphy_privid;
532 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
533 WIPHY_FLAG_4ADDR_AP |
534 WIPHY_FLAG_4ADDR_STATION |
535 WIPHY_FLAG_REPORTS_OBSS |
536 WIPHY_FLAG_OFFCHAN_TX;
538 if (ops->remain_on_channel)
539 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
541 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
542 NL80211_FEATURE_SAE |
543 NL80211_FEATURE_HT_IBSS |
544 NL80211_FEATURE_VIF_TXPOWER;
547 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
548 NL80211_FEATURE_AP_SCAN;
552 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
554 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
556 local = wiphy_priv(wiphy);
558 local->hw.wiphy = wiphy;
560 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
563 local->use_chanctx = use_chanctx;
565 /* set up some defaults */
566 local->hw.queues = 1;
567 local->hw.max_rates = 1;
568 local->hw.max_report_rates = 0;
569 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
570 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
571 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
572 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
573 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
574 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
575 IEEE80211_RADIOTAP_MCS_HAVE_GI |
576 IEEE80211_RADIOTAP_MCS_HAVE_BW;
577 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
578 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
579 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
580 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
582 INIT_LIST_HEAD(&local->interfaces);
584 __hw_addr_init(&local->mc_list);
586 mutex_init(&local->iflist_mtx);
587 mutex_init(&local->mtx);
589 mutex_init(&local->key_mtx);
590 spin_lock_init(&local->filter_lock);
591 spin_lock_init(&local->queue_stop_reason_lock);
593 INIT_LIST_HEAD(&local->chanctx_list);
594 mutex_init(&local->chanctx_mtx);
597 * The rx_skb_queue is only accessed from tasklets,
598 * but other SKB queues are used from within IRQ
599 * context. Therefore, this one needs a different
600 * locking class so our direct, non-irq-safe use of
601 * the queue's lock doesn't throw lockdep warnings.
603 skb_queue_head_init_class(&local->rx_skb_queue,
604 &ieee80211_rx_skb_queue_class);
606 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
608 INIT_WORK(&local->restart_work, ieee80211_restart_work);
610 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
611 local->smps_mode = IEEE80211_SMPS_OFF;
613 INIT_WORK(&local->dynamic_ps_enable_work,
614 ieee80211_dynamic_ps_enable_work);
615 INIT_WORK(&local->dynamic_ps_disable_work,
616 ieee80211_dynamic_ps_disable_work);
617 setup_timer(&local->dynamic_ps_timer,
618 ieee80211_dynamic_ps_timer, (unsigned long) local);
620 INIT_WORK(&local->sched_scan_stopped_work,
621 ieee80211_sched_scan_stopped_work);
623 spin_lock_init(&local->ack_status_lock);
624 idr_init(&local->ack_status_frames);
625 /* preallocate at least one entry */
626 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
628 sta_info_init(local);
630 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
631 skb_queue_head_init(&local->pending[i]);
632 atomic_set(&local->agg_queue_stop[i], 0);
634 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
635 (unsigned long)local);
637 tasklet_init(&local->tasklet,
638 ieee80211_tasklet_handler,
639 (unsigned long) local);
641 skb_queue_head_init(&local->skb_queue);
642 skb_queue_head_init(&local->skb_queue_unreliable);
644 /* init dummy netdev for use w/ NAPI */
645 init_dummy_netdev(&local->napi_dev);
647 ieee80211_led_names(local);
649 ieee80211_roc_setup(local);
653 EXPORT_SYMBOL(ieee80211_alloc_hw);
655 int ieee80211_register_hw(struct ieee80211_hw *hw)
657 struct ieee80211_local *local = hw_to_local(hw);
659 enum ieee80211_band band;
660 int channels, max_bitrates;
661 bool supp_ht, supp_vht;
662 netdev_features_t feature_whitelist;
663 static const u32 cipher_suites[] = {
664 /* keep WEP first, it may be removed below */
665 WLAN_CIPHER_SUITE_WEP40,
666 WLAN_CIPHER_SUITE_WEP104,
667 WLAN_CIPHER_SUITE_TKIP,
668 WLAN_CIPHER_SUITE_CCMP,
670 /* keep last -- depends on hw flags! */
671 WLAN_CIPHER_SUITE_AES_CMAC
674 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
675 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
676 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
680 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
681 (!local->ops->suspend || !local->ops->resume))
685 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
688 if (!local->use_chanctx) {
689 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
690 const struct ieee80211_iface_combination *comb;
692 comb = &local->hw.wiphy->iface_combinations[i];
694 if (comb->num_different_channels > 1)
699 * WDS is currently prohibited when channel contexts are used
700 * because there's no clear definition of which channel WDS
701 * type interfaces use
703 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
707 /* Only HW csum features are currently compatible with mac80211 */
708 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
710 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
713 if (hw->max_report_rates == 0)
714 hw->max_report_rates = hw->max_rates;
716 local->rx_chains = 1;
719 * generic code guarantees at least one band,
720 * set this very early because much code assumes
721 * that hw.conf.channel is assigned
727 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
728 struct ieee80211_supported_band *sband;
730 sband = local->hw.wiphy->bands[band];
733 if (!local->use_chanctx && !local->_oper_channel) {
734 /* init channel we're on */
735 local->hw.conf.channel =
736 local->_oper_channel = &sband->channels[0];
737 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
739 cfg80211_chandef_create(&local->monitor_chandef,
742 channels += sband->n_channels;
744 if (max_bitrates < sband->n_bitrates)
745 max_bitrates = sband->n_bitrates;
746 supp_ht = supp_ht || sband->ht_cap.ht_supported;
747 supp_vht = supp_vht || sband->vht_cap.vht_supported;
749 if (sband->ht_cap.ht_supported)
751 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
754 /* TODO: consider VHT for RX chains, hopefully it's the same */
757 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
758 sizeof(void *) * channels, GFP_KERNEL);
759 if (!local->int_scan_req)
762 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
763 if (!local->hw.wiphy->bands[band])
765 local->int_scan_req->rates[band] = (u32) -1;
768 /* if low-level driver supports AP, we also support VLAN */
769 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
770 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
771 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
774 /* mac80211 always supports monitor */
775 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
776 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
778 /* mac80211 doesn't support more than one IBSS interface right now */
779 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
780 const struct ieee80211_iface_combination *c;
783 c = &hw->wiphy->iface_combinations[i];
785 for (j = 0; j < c->n_limits; j++)
786 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
787 c->limits[j].max > 1)
791 #ifndef CONFIG_MAC80211_MESH
792 /* mesh depends on Kconfig, but drivers should set it if they want */
793 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
796 /* if the underlying driver supports mesh, mac80211 will (at least)
797 * provide routing of mesh authentication frames to userspace */
798 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
799 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
801 /* mac80211 supports control port protocol changing */
802 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
804 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
805 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
806 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
807 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
809 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
810 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
811 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
814 * Calculate scan IE length -- we need this to alloc
815 * memory and to subtract from the driver limit. It
816 * includes the DS Params, (extended) supported rates, and HT
817 * information -- SSID is the driver's responsibility.
819 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
822 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
825 local->scan_ies_len +=
826 2 + sizeof(struct ieee80211_vht_cap);
829 * (for now at least), drivers wanting to use VHT must
830 * support channel contexts, as they contain all the
831 * necessary VHT information and the global hw config
834 if (WARN_ON(!local->use_chanctx)) {
836 goto fail_wiphy_register;
840 if (!local->ops->hw_scan) {
841 /* For hw_scan, driver needs to set these up. */
842 local->hw.wiphy->max_scan_ssids = 4;
843 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
847 * If the driver supports any scan IEs, then assume the
848 * limit includes the IEs mac80211 will add, otherwise
849 * leave it at zero and let the driver sort it out; we
850 * still pass our IEs to the driver but userspace will
851 * not be allowed to in that case.
853 if (local->hw.wiphy->max_scan_ie_len)
854 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
856 /* Set up cipher suites unless driver already did */
857 if (!local->hw.wiphy->cipher_suites) {
858 local->hw.wiphy->cipher_suites = cipher_suites;
859 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
860 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
861 local->hw.wiphy->n_cipher_suites--;
863 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
864 if (local->hw.wiphy->cipher_suites == cipher_suites) {
865 local->hw.wiphy->cipher_suites += 2;
866 local->hw.wiphy->n_cipher_suites -= 2;
874 local->hw.wiphy->cipher_suites,
875 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
879 goto fail_wiphy_register;
881 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
882 u32 suite = local->hw.wiphy->cipher_suites[r];
883 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
884 suite == WLAN_CIPHER_SUITE_WEP104)
888 local->hw.wiphy->cipher_suites = suites;
889 local->hw.wiphy->n_cipher_suites = w;
890 local->wiphy_ciphers_allocated = true;
894 if (!local->ops->remain_on_channel)
895 local->hw.wiphy->max_remain_on_channel_duration = 5000;
897 if (local->ops->sched_scan_start)
898 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
900 /* mac80211 based drivers don't support internal TDLS setup */
901 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
902 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
904 result = wiphy_register(local->hw.wiphy);
906 goto fail_wiphy_register;
909 * We use the number of queues for feature tests (QoS, HT) internally
910 * so restrict them appropriately.
912 if (hw->queues > IEEE80211_MAX_QUEUES)
913 hw->queues = IEEE80211_MAX_QUEUES;
916 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
917 if (!local->workqueue) {
923 * The hardware needs headroom for sending the frame,
924 * and we need some headroom for passing the frame to monitor
925 * interfaces, but never both at the same time.
927 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
928 IEEE80211_TX_STATUS_HEADROOM);
930 debugfs_hw_add(local);
933 * if the driver doesn't specify a max listen interval we
934 * use 5 which should be a safe default
936 if (local->hw.max_listen_interval == 0)
937 local->hw.max_listen_interval = 5;
939 local->hw.conf.listen_interval = local->hw.max_listen_interval;
941 local->dynamic_ps_forced_timeout = -1;
943 result = ieee80211_wep_init(local);
945 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
948 ieee80211_led_init(local);
952 result = ieee80211_init_rate_ctrl_alg(local,
953 hw->rate_control_algorithm);
955 wiphy_debug(local->hw.wiphy,
956 "Failed to initialize rate control algorithm\n");
960 /* add one default STA interface if supported */
961 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
962 result = ieee80211_if_add(local, "wlan%d", NULL,
963 NL80211_IFTYPE_STATION, NULL);
965 wiphy_warn(local->hw.wiphy,
966 "Failed to add default virtual iface\n");
971 local->network_latency_notifier.notifier_call =
972 ieee80211_max_network_latency;
973 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
974 &local->network_latency_notifier);
981 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
982 result = register_inetaddr_notifier(&local->ifa_notifier);
987 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
988 local->hw.napi_weight);
994 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
995 &local->network_latency_notifier);
999 ieee80211_led_exit(local);
1000 ieee80211_remove_interfaces(local);
1003 ieee80211_wep_free(local);
1004 sta_info_stop(local);
1005 destroy_workqueue(local->workqueue);
1007 wiphy_unregister(local->hw.wiphy);
1008 fail_wiphy_register:
1009 if (local->wiphy_ciphers_allocated)
1010 kfree(local->hw.wiphy->cipher_suites);
1011 kfree(local->int_scan_req);
1014 EXPORT_SYMBOL(ieee80211_register_hw);
1016 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1018 struct ieee80211_local *local = hw_to_local(hw);
1020 tasklet_kill(&local->tx_pending_tasklet);
1021 tasklet_kill(&local->tasklet);
1023 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1024 &local->network_latency_notifier);
1026 unregister_inetaddr_notifier(&local->ifa_notifier);
1032 * At this point, interface list manipulations are fine
1033 * because the driver cannot be handing us frames any
1034 * more and the tasklet is killed.
1036 ieee80211_remove_interfaces(local);
1040 cancel_work_sync(&local->restart_work);
1041 cancel_work_sync(&local->reconfig_filter);
1043 ieee80211_clear_tx_pending(local);
1044 rate_control_deinitialize(local);
1046 if (skb_queue_len(&local->skb_queue) ||
1047 skb_queue_len(&local->skb_queue_unreliable))
1048 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1049 skb_queue_purge(&local->skb_queue);
1050 skb_queue_purge(&local->skb_queue_unreliable);
1051 skb_queue_purge(&local->rx_skb_queue);
1053 destroy_workqueue(local->workqueue);
1054 wiphy_unregister(local->hw.wiphy);
1055 sta_info_stop(local);
1056 ieee80211_wep_free(local);
1057 ieee80211_led_exit(local);
1058 kfree(local->int_scan_req);
1060 EXPORT_SYMBOL(ieee80211_unregister_hw);
1062 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1064 WARN_ONCE(1, "Have pending ack frames!\n");
1069 void ieee80211_free_hw(struct ieee80211_hw *hw)
1071 struct ieee80211_local *local = hw_to_local(hw);
1073 mutex_destroy(&local->iflist_mtx);
1074 mutex_destroy(&local->mtx);
1076 if (local->wiphy_ciphers_allocated)
1077 kfree(local->hw.wiphy->cipher_suites);
1079 idr_for_each(&local->ack_status_frames,
1080 ieee80211_free_ack_frame, NULL);
1081 idr_destroy(&local->ack_status_frames);
1083 wiphy_free(local->hw.wiphy);
1085 EXPORT_SYMBOL(ieee80211_free_hw);
1087 static int __init ieee80211_init(void)
1089 struct sk_buff *skb;
1092 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1093 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1094 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1096 ret = rc80211_minstrel_init();
1100 ret = rc80211_minstrel_ht_init();
1104 ret = rc80211_pid_init();
1108 ret = ieee80211_iface_init();
1116 rc80211_minstrel_ht_exit();
1118 rc80211_minstrel_exit();
1123 static void __exit ieee80211_exit(void)
1126 rc80211_minstrel_ht_exit();
1127 rc80211_minstrel_exit();
1132 ieee80211_iface_exit();
1138 subsys_initcall(ieee80211_init);
1139 module_exit(ieee80211_exit);
1141 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1142 MODULE_LICENSE("GPL");