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 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
98 struct ieee80211_channel *chan;
101 enum nl80211_channel_type channel_type;
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 = local->tmp_channel_type;
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 if (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;
156 power = local->power_constr_level ?
158 (chan->max_reg_power - local->power_constr_level)) :
161 if (local->user_power_level >= 0)
162 power = min(power, local->user_power_level);
164 if (local->hw.conf.power_level != power) {
165 changed |= IEEE80211_CONF_CHANGE_POWER;
166 local->hw.conf.power_level = power;
169 if (changed && local->open_count) {
170 ret = drv_config(local, changed);
173 * HW reconfiguration should never fail, the driver has told
174 * us what it can support so it should live up to that promise.
177 * rfkill is not integrated with mac80211 and a
178 * configuration command can thus fail if hardware rfkill
181 * FIXME: integrate rfkill with mac80211 and then add this
191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
194 struct ieee80211_local *local = sdata->local;
195 static const u8 zero[ETH_ALEN] = { 0 };
200 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
201 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
202 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
203 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
204 else if (sdata->vif.type == NL80211_IFTYPE_AP)
205 sdata->vif.bss_conf.bssid = sdata->vif.addr;
206 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
207 sdata->vif.bss_conf.bssid = NULL;
208 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
209 sdata->vif.bss_conf.bssid = zero;
215 switch (sdata->vif.type) {
216 case NL80211_IFTYPE_AP:
217 case NL80211_IFTYPE_ADHOC:
218 case NL80211_IFTYPE_WDS:
219 case NL80211_IFTYPE_MESH_POINT:
222 /* do not warn to simplify caller in scan.c */
223 changed &= ~BSS_CHANGED_BEACON_ENABLED;
224 if (WARN_ON(changed & BSS_CHANGED_BEACON))
229 if (changed & BSS_CHANGED_BEACON_ENABLED) {
230 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
231 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
232 sdata->vif.bss_conf.enable_beacon = false;
235 * Beacon should be enabled, but AP mode must
236 * check whether there is a beacon configured.
238 switch (sdata->vif.type) {
239 case NL80211_IFTYPE_AP:
240 sdata->vif.bss_conf.enable_beacon =
241 !!sdata->u.ap.beacon;
243 case NL80211_IFTYPE_ADHOC:
244 sdata->vif.bss_conf.enable_beacon =
245 !!sdata->u.ibss.presp;
247 #ifdef CONFIG_MAC80211_MESH
248 case NL80211_IFTYPE_MESH_POINT:
249 sdata->vif.bss_conf.enable_beacon =
250 !!sdata->u.mesh.mesh_id_len;
261 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
264 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
266 sdata->vif.bss_conf.use_cts_prot = false;
267 sdata->vif.bss_conf.use_short_preamble = false;
268 sdata->vif.bss_conf.use_short_slot = false;
269 return BSS_CHANGED_ERP_CTS_PROT |
270 BSS_CHANGED_ERP_PREAMBLE |
271 BSS_CHANGED_ERP_SLOT;
274 static void ieee80211_tasklet_handler(unsigned long data)
276 struct ieee80211_local *local = (struct ieee80211_local *) data;
277 struct sta_info *sta, *tmp;
278 struct skb_eosp_msg_data *eosp_data;
281 while ((skb = skb_dequeue(&local->skb_queue)) ||
282 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
283 switch (skb->pkt_type) {
284 case IEEE80211_RX_MSG:
285 /* Clear skb->pkt_type in order to not confuse kernel
288 ieee80211_rx(&local->hw, skb);
290 case IEEE80211_TX_STATUS_MSG:
292 ieee80211_tx_status(&local->hw, skb);
294 case IEEE80211_EOSP_MSG:
295 eosp_data = (void *)skb->cb;
296 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
297 /* skip wrong virtual interface */
298 if (memcmp(eosp_data->iface,
299 sta->sdata->vif.addr, ETH_ALEN))
301 clear_sta_flag(sta, WLAN_STA_SP);
307 WARN(1, "mac80211: Packet is of unknown type %d\n",
315 static void ieee80211_restart_work(struct work_struct *work)
317 struct ieee80211_local *local =
318 container_of(work, struct ieee80211_local, restart_work);
320 /* wait for scan work complete */
321 flush_workqueue(local->workqueue);
323 mutex_lock(&local->mtx);
324 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
325 local->sched_scanning,
326 "%s called with hardware scan in progress\n", __func__);
327 mutex_unlock(&local->mtx);
330 ieee80211_scan_cancel(local);
331 ieee80211_reconfig(local);
335 void ieee80211_restart_hw(struct ieee80211_hw *hw)
337 struct ieee80211_local *local = hw_to_local(hw);
339 trace_api_restart_hw(local);
341 wiphy_info(hw->wiphy,
342 "Hardware restart was requested\n");
344 /* use this reason, ieee80211_reconfig will unblock it */
345 ieee80211_stop_queues_by_reason(hw,
346 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
349 * Stop all Rx during the reconfig. We don't want state changes
350 * or driver callbacks while this is in progress.
352 local->in_reconfig = true;
355 schedule_work(&local->restart_work);
357 EXPORT_SYMBOL(ieee80211_restart_hw);
359 static void ieee80211_recalc_smps_work(struct work_struct *work)
361 struct ieee80211_local *local =
362 container_of(work, struct ieee80211_local, recalc_smps);
364 mutex_lock(&local->iflist_mtx);
365 ieee80211_recalc_smps(local);
366 mutex_unlock(&local->iflist_mtx);
370 static int ieee80211_ifa_changed(struct notifier_block *nb,
371 unsigned long data, void *arg)
373 struct in_ifaddr *ifa = arg;
374 struct ieee80211_local *local =
375 container_of(nb, struct ieee80211_local,
377 struct net_device *ndev = ifa->ifa_dev->dev;
378 struct wireless_dev *wdev = ndev->ieee80211_ptr;
379 struct in_device *idev;
380 struct ieee80211_sub_if_data *sdata;
381 struct ieee80211_bss_conf *bss_conf;
382 struct ieee80211_if_managed *ifmgd;
385 /* Make sure it's our interface that got changed */
389 if (wdev->wiphy != local->hw.wiphy)
392 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
393 bss_conf = &sdata->vif.bss_conf;
395 /* ARP filtering is only supported in managed mode */
396 if (sdata->vif.type != NL80211_IFTYPE_STATION)
399 idev = __in_dev_get_rtnl(sdata->dev);
403 ifmgd = &sdata->u.mgd;
404 mutex_lock(&ifmgd->mtx);
406 /* Copy the addresses to the bss_conf list */
407 ifa = idev->ifa_list;
408 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
409 bss_conf->arp_addr_list[c] = ifa->ifa_address;
414 /* If not all addresses fit the list, disable filtering */
416 sdata->arp_filter_state = false;
419 sdata->arp_filter_state = true;
421 bss_conf->arp_addr_cnt = c;
423 /* Configure driver only if associated (which also implies it is up) */
424 if (ifmgd->associated) {
425 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
426 ieee80211_bss_info_change_notify(sdata,
427 BSS_CHANGED_ARP_FILTER);
430 mutex_unlock(&ifmgd->mtx);
436 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
438 struct ieee80211_local *local =
439 container_of(napi, struct ieee80211_local, napi);
441 return local->ops->napi_poll(&local->hw, budget);
444 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
446 struct ieee80211_local *local = hw_to_local(hw);
448 napi_schedule(&local->napi);
450 EXPORT_SYMBOL(ieee80211_napi_schedule);
452 void ieee80211_napi_complete(struct ieee80211_hw *hw)
454 struct ieee80211_local *local = hw_to_local(hw);
456 napi_complete(&local->napi);
458 EXPORT_SYMBOL(ieee80211_napi_complete);
460 /* There isn't a lot of sense in it, but you can transmit anything you like */
461 static const struct ieee80211_txrx_stypes
462 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
463 [NL80211_IFTYPE_ADHOC] = {
465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
466 BIT(IEEE80211_STYPE_AUTH >> 4) |
467 BIT(IEEE80211_STYPE_DEAUTH >> 4),
469 [NL80211_IFTYPE_STATION] = {
471 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
474 [NL80211_IFTYPE_AP] = {
476 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
477 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
478 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
479 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
480 BIT(IEEE80211_STYPE_AUTH >> 4) |
481 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
482 BIT(IEEE80211_STYPE_ACTION >> 4),
484 [NL80211_IFTYPE_AP_VLAN] = {
487 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
488 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
489 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
490 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
491 BIT(IEEE80211_STYPE_AUTH >> 4) |
492 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
493 BIT(IEEE80211_STYPE_ACTION >> 4),
495 [NL80211_IFTYPE_P2P_CLIENT] = {
497 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
498 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
500 [NL80211_IFTYPE_P2P_GO] = {
502 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
503 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
504 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
505 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
506 BIT(IEEE80211_STYPE_AUTH >> 4) |
507 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
508 BIT(IEEE80211_STYPE_ACTION >> 4),
510 [NL80211_IFTYPE_MESH_POINT] = {
512 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
513 BIT(IEEE80211_STYPE_AUTH >> 4) |
514 BIT(IEEE80211_STYPE_DEAUTH >> 4),
518 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
519 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
520 IEEE80211_HT_AMPDU_PARM_DENSITY,
522 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
523 IEEE80211_HT_CAP_MAX_AMSDU |
524 IEEE80211_HT_CAP_SGI_40),
526 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
527 0xff, 0xff, 0xff, 0xff, 0xff, },
531 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
532 const struct ieee80211_ops *ops)
534 struct ieee80211_local *local;
538 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
541 /* Ensure 32-byte alignment of our private data and hw private data.
542 * We use the wiphy priv data for both our ieee80211_local and for
543 * the driver's private data
545 * In memory it'll be like this:
547 * +-------------------------+
549 * +-------------------------+
550 * | struct ieee80211_local |
551 * +-------------------------+
552 * | driver's private data |
553 * +-------------------------+
556 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
558 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
563 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
565 wiphy->privid = mac80211_wiphy_privid;
567 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
568 WIPHY_FLAG_4ADDR_AP |
569 WIPHY_FLAG_4ADDR_STATION |
570 WIPHY_FLAG_REPORTS_OBSS |
571 WIPHY_FLAG_OFFCHAN_TX;
573 if (ops->remain_on_channel)
574 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
576 wiphy->features = NL80211_FEATURE_SK_TX_STATUS |
577 NL80211_FEATURE_HT_IBSS;
580 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
582 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
584 local = wiphy_priv(wiphy);
586 local->hw.wiphy = wiphy;
588 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
593 BUG_ON(!ops->config);
594 BUG_ON(!ops->add_interface);
595 BUG_ON(!ops->remove_interface);
596 BUG_ON(!ops->configure_filter);
599 /* set up some defaults */
600 local->hw.queues = 1;
601 local->hw.max_rates = 1;
602 local->hw.max_report_rates = 0;
603 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
604 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
605 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
606 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
607 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
608 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
609 IEEE80211_RADIOTAP_MCS_HAVE_GI |
610 IEEE80211_RADIOTAP_MCS_HAVE_BW;
611 local->user_power_level = -1;
612 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
614 INIT_LIST_HEAD(&local->interfaces);
616 __hw_addr_init(&local->mc_list);
618 mutex_init(&local->iflist_mtx);
619 mutex_init(&local->mtx);
621 mutex_init(&local->key_mtx);
622 spin_lock_init(&local->filter_lock);
623 spin_lock_init(&local->queue_stop_reason_lock);
626 * The rx_skb_queue is only accessed from tasklets,
627 * but other SKB queues are used from within IRQ
628 * context. Therefore, this one needs a different
629 * locking class so our direct, non-irq-safe use of
630 * the queue's lock doesn't throw lockdep warnings.
632 skb_queue_head_init_class(&local->rx_skb_queue,
633 &ieee80211_rx_skb_queue_class);
635 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
637 INIT_WORK(&local->restart_work, ieee80211_restart_work);
639 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
640 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
641 local->smps_mode = IEEE80211_SMPS_OFF;
643 INIT_WORK(&local->dynamic_ps_enable_work,
644 ieee80211_dynamic_ps_enable_work);
645 INIT_WORK(&local->dynamic_ps_disable_work,
646 ieee80211_dynamic_ps_disable_work);
647 setup_timer(&local->dynamic_ps_timer,
648 ieee80211_dynamic_ps_timer, (unsigned long) local);
650 INIT_WORK(&local->sched_scan_stopped_work,
651 ieee80211_sched_scan_stopped_work);
653 spin_lock_init(&local->ack_status_lock);
654 idr_init(&local->ack_status_frames);
655 /* preallocate at least one entry */
656 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
658 sta_info_init(local);
660 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
661 skb_queue_head_init(&local->pending[i]);
662 atomic_set(&local->agg_queue_stop[i], 0);
664 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
665 (unsigned long)local);
667 tasklet_init(&local->tasklet,
668 ieee80211_tasklet_handler,
669 (unsigned long) local);
671 skb_queue_head_init(&local->skb_queue);
672 skb_queue_head_init(&local->skb_queue_unreliable);
674 /* init dummy netdev for use w/ NAPI */
675 init_dummy_netdev(&local->napi_dev);
677 ieee80211_led_names(local);
679 ieee80211_roc_setup(local);
683 EXPORT_SYMBOL(ieee80211_alloc_hw);
685 int ieee80211_register_hw(struct ieee80211_hw *hw)
687 struct ieee80211_local *local = hw_to_local(hw);
689 enum ieee80211_band band;
690 int channels, max_bitrates;
691 bool supp_ht, supp_vht;
692 netdev_features_t feature_whitelist;
693 static const u32 cipher_suites[] = {
694 /* keep WEP first, it may be removed below */
695 WLAN_CIPHER_SUITE_WEP40,
696 WLAN_CIPHER_SUITE_WEP104,
697 WLAN_CIPHER_SUITE_TKIP,
698 WLAN_CIPHER_SUITE_CCMP,
700 /* keep last -- depends on hw flags! */
701 WLAN_CIPHER_SUITE_AES_CMAC
704 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
705 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
706 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
710 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
711 (!local->ops->suspend || !local->ops->resume))
715 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
718 /* Only HW csum features are currently compatible with mac80211 */
719 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
721 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
724 if (hw->max_report_rates == 0)
725 hw->max_report_rates = hw->max_rates;
728 * generic code guarantees at least one band,
729 * set this very early because much code assumes
730 * that hw.conf.channel is assigned
736 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
737 struct ieee80211_supported_band *sband;
739 sband = local->hw.wiphy->bands[band];
742 if (!local->oper_channel) {
743 /* init channel we're on */
744 local->hw.conf.channel =
745 local->oper_channel = &sband->channels[0];
746 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
748 channels += sband->n_channels;
750 if (max_bitrates < sband->n_bitrates)
751 max_bitrates = sband->n_bitrates;
752 supp_ht = supp_ht || sband->ht_cap.ht_supported;
753 supp_vht = supp_vht || sband->vht_cap.vht_supported;
756 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
757 sizeof(void *) * channels, GFP_KERNEL);
758 if (!local->int_scan_req)
761 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
762 if (!local->hw.wiphy->bands[band])
764 local->int_scan_req->rates[band] = (u32) -1;
767 /* if low-level driver supports AP, we also support VLAN */
768 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
769 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
770 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
773 /* mac80211 always supports monitor */
774 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
775 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
778 * mac80211 doesn't support more than 1 channel, and also not more
779 * than one IBSS interface
781 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
782 const struct ieee80211_iface_combination *c;
785 c = &hw->wiphy->iface_combinations[i];
787 if (c->num_different_channels > 1)
790 for (j = 0; j < c->n_limits; j++)
791 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
792 c->limits[j].max > 1)
796 #ifndef CONFIG_MAC80211_MESH
797 /* mesh depends on Kconfig, but drivers should set it if they want */
798 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
801 /* if the underlying driver supports mesh, mac80211 will (at least)
802 * provide routing of mesh authentication frames to userspace */
803 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
804 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
806 /* mac80211 supports control port protocol changing */
807 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
809 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
810 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
811 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
812 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
814 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
815 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
816 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
819 * Calculate scan IE length -- we need this to alloc
820 * memory and to subtract from the driver limit. It
821 * includes the DS Params, (extended) supported rates, and HT
822 * information -- SSID is the driver's responsibility.
824 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
827 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
830 local->scan_ies_len +=
831 2 + sizeof(struct ieee80211_vht_capabilities);
833 if (!local->ops->hw_scan) {
834 /* For hw_scan, driver needs to set these up. */
835 local->hw.wiphy->max_scan_ssids = 4;
836 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
840 * If the driver supports any scan IEs, then assume the
841 * limit includes the IEs mac80211 will add, otherwise
842 * leave it at zero and let the driver sort it out; we
843 * still pass our IEs to the driver but userspace will
844 * not be allowed to in that case.
846 if (local->hw.wiphy->max_scan_ie_len)
847 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
849 /* Set up cipher suites unless driver already did */
850 if (!local->hw.wiphy->cipher_suites) {
851 local->hw.wiphy->cipher_suites = cipher_suites;
852 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
853 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
854 local->hw.wiphy->n_cipher_suites--;
856 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
857 if (local->hw.wiphy->cipher_suites == cipher_suites) {
858 local->hw.wiphy->cipher_suites += 2;
859 local->hw.wiphy->n_cipher_suites -= 2;
867 local->hw.wiphy->cipher_suites,
868 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
872 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
873 u32 suite = local->hw.wiphy->cipher_suites[r];
874 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
875 suite == WLAN_CIPHER_SUITE_WEP104)
879 local->hw.wiphy->cipher_suites = suites;
880 local->hw.wiphy->n_cipher_suites = w;
881 local->wiphy_ciphers_allocated = true;
885 if (!local->ops->remain_on_channel)
886 local->hw.wiphy->max_remain_on_channel_duration = 5000;
888 if (local->ops->sched_scan_start)
889 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
891 /* mac80211 based drivers don't support internal TDLS setup */
892 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
893 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
895 result = wiphy_register(local->hw.wiphy);
897 goto fail_wiphy_register;
900 * We use the number of queues for feature tests (QoS, HT) internally
901 * so restrict them appropriately.
903 if (hw->queues > IEEE80211_MAX_QUEUES)
904 hw->queues = IEEE80211_MAX_QUEUES;
907 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
908 if (!local->workqueue) {
914 * The hardware needs headroom for sending the frame,
915 * and we need some headroom for passing the frame to monitor
916 * interfaces, but never both at the same time.
918 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
919 IEEE80211_TX_STATUS_HEADROOM);
921 debugfs_hw_add(local);
924 * if the driver doesn't specify a max listen interval we
925 * use 5 which should be a safe default
927 if (local->hw.max_listen_interval == 0)
928 local->hw.max_listen_interval = 5;
930 local->hw.conf.listen_interval = local->hw.max_listen_interval;
932 local->dynamic_ps_forced_timeout = -1;
934 result = ieee80211_wep_init(local);
936 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
939 ieee80211_led_init(local);
943 result = ieee80211_init_rate_ctrl_alg(local,
944 hw->rate_control_algorithm);
946 wiphy_debug(local->hw.wiphy,
947 "Failed to initialize rate control algorithm\n");
951 /* add one default STA interface if supported */
952 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
953 result = ieee80211_if_add(local, "wlan%d", NULL,
954 NL80211_IFTYPE_STATION, NULL);
956 wiphy_warn(local->hw.wiphy,
957 "Failed to add default virtual iface\n");
962 local->network_latency_notifier.notifier_call =
963 ieee80211_max_network_latency;
964 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
965 &local->network_latency_notifier);
972 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
973 result = register_inetaddr_notifier(&local->ifa_notifier);
978 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
979 local->hw.napi_weight);
985 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
986 &local->network_latency_notifier);
990 ieee80211_led_exit(local);
991 ieee80211_remove_interfaces(local);
994 ieee80211_wep_free(local);
995 sta_info_stop(local);
996 destroy_workqueue(local->workqueue);
998 wiphy_unregister(local->hw.wiphy);
1000 if (local->wiphy_ciphers_allocated)
1001 kfree(local->hw.wiphy->cipher_suites);
1002 kfree(local->int_scan_req);
1005 EXPORT_SYMBOL(ieee80211_register_hw);
1007 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1009 struct ieee80211_local *local = hw_to_local(hw);
1011 tasklet_kill(&local->tx_pending_tasklet);
1012 tasklet_kill(&local->tasklet);
1014 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1015 &local->network_latency_notifier);
1017 unregister_inetaddr_notifier(&local->ifa_notifier);
1023 * At this point, interface list manipulations are fine
1024 * because the driver cannot be handing us frames any
1025 * more and the tasklet is killed.
1027 ieee80211_remove_interfaces(local);
1031 cancel_work_sync(&local->restart_work);
1032 cancel_work_sync(&local->reconfig_filter);
1034 ieee80211_clear_tx_pending(local);
1035 rate_control_deinitialize(local);
1037 if (skb_queue_len(&local->skb_queue) ||
1038 skb_queue_len(&local->skb_queue_unreliable))
1039 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1040 skb_queue_purge(&local->skb_queue);
1041 skb_queue_purge(&local->skb_queue_unreliable);
1042 skb_queue_purge(&local->rx_skb_queue);
1044 destroy_workqueue(local->workqueue);
1045 wiphy_unregister(local->hw.wiphy);
1046 sta_info_stop(local);
1047 ieee80211_wep_free(local);
1048 ieee80211_led_exit(local);
1049 kfree(local->int_scan_req);
1051 EXPORT_SYMBOL(ieee80211_unregister_hw);
1053 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1055 WARN_ONCE(1, "Have pending ack frames!\n");
1060 void ieee80211_free_hw(struct ieee80211_hw *hw)
1062 struct ieee80211_local *local = hw_to_local(hw);
1064 mutex_destroy(&local->iflist_mtx);
1065 mutex_destroy(&local->mtx);
1067 if (local->wiphy_ciphers_allocated)
1068 kfree(local->hw.wiphy->cipher_suites);
1070 idr_for_each(&local->ack_status_frames,
1071 ieee80211_free_ack_frame, NULL);
1072 idr_destroy(&local->ack_status_frames);
1074 wiphy_free(local->hw.wiphy);
1076 EXPORT_SYMBOL(ieee80211_free_hw);
1078 static int __init ieee80211_init(void)
1080 struct sk_buff *skb;
1083 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1084 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1085 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1087 ret = rc80211_minstrel_init();
1091 ret = rc80211_minstrel_ht_init();
1095 ret = rc80211_pid_init();
1099 ret = ieee80211_iface_init();
1107 rc80211_minstrel_ht_exit();
1109 rc80211_minstrel_exit();
1114 static void __exit ieee80211_exit(void)
1117 rc80211_minstrel_ht_exit();
1118 rc80211_minstrel_exit();
1123 ieee80211_iface_exit();
1129 subsys_initcall(ieee80211_init);
1130 module_exit(ieee80211_exit);
1132 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1133 MODULE_LICENSE("GPL");