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 || 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);
96 * Returns true if we are logically configured to be on
97 * the operating channel AND the hardware-conf is currently
98 * configured on the operating channel. Compares channel-type
101 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local)
103 struct ieee80211_channel *chan;
104 enum nl80211_channel_type channel_type;
106 /* This logic needs to match logic in ieee80211_hw_config */
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)
128 /* Check current hardware-config against oper_channel. */
129 if (local->oper_channel != local->hw.conf.channel ||
130 local->_oper_channel_type != local->hw.conf.channel_type)
136 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
138 struct ieee80211_channel *chan;
141 enum nl80211_channel_type channel_type;
146 /* If this off-channel logic ever changes, ieee80211_on_oper_channel
147 * may need to change as well.
149 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
150 if (local->scan_channel) {
151 chan = local->scan_channel;
152 /* If scanning on oper channel, use whatever channel-type
153 * is currently in use.
155 if (chan == local->oper_channel)
156 channel_type = local->_oper_channel_type;
158 channel_type = NL80211_CHAN_NO_HT;
159 } else if (local->tmp_channel) {
160 chan = local->tmp_channel;
161 channel_type = local->tmp_channel_type;
163 chan = local->oper_channel;
164 channel_type = local->_oper_channel_type;
167 if (chan != local->oper_channel ||
168 channel_type != local->_oper_channel_type)
169 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
171 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
173 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
175 if (offchannel_flag || chan != local->hw.conf.channel ||
176 channel_type != local->hw.conf.channel_type) {
177 local->hw.conf.channel = chan;
178 local->hw.conf.channel_type = channel_type;
179 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
182 if (!conf_is_ht(&local->hw.conf)) {
184 * mac80211.h documents that this is only valid
185 * when the channel is set to an HT type, and
186 * that otherwise STATIC is used.
188 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
189 } else if (local->hw.conf.smps_mode != local->smps_mode) {
190 local->hw.conf.smps_mode = local->smps_mode;
191 changed |= IEEE80211_CONF_CHANGE_SMPS;
194 if ((local->scanning & SCAN_SW_SCANNING) ||
195 (local->scanning & SCAN_HW_SCANNING))
196 power = chan->max_power;
198 power = local->power_constr_level ?
199 (chan->max_power - local->power_constr_level) :
202 if (local->user_power_level >= 0)
203 power = min(power, local->user_power_level);
205 if (local->hw.conf.power_level != power) {
206 changed |= IEEE80211_CONF_CHANGE_POWER;
207 local->hw.conf.power_level = power;
210 if (changed && local->open_count) {
211 ret = drv_config(local, changed);
214 * HW reconfiguration should never fail, the driver has told
215 * us what it can support so it should live up to that promise.
218 * rfkill is not integrated with mac80211 and a
219 * configuration command can thus fail if hardware rfkill
222 * FIXME: integrate rfkill with mac80211 and then add this
232 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
235 struct ieee80211_local *local = sdata->local;
236 static const u8 zero[ETH_ALEN] = { 0 };
241 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
243 * While not associated, claim a BSSID of all-zeroes
244 * so that drivers don't do any weird things with the
245 * BSSID at that time.
247 if (sdata->vif.bss_conf.assoc)
248 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
250 sdata->vif.bss_conf.bssid = zero;
251 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
252 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
253 else if (sdata->vif.type == NL80211_IFTYPE_AP)
254 sdata->vif.bss_conf.bssid = sdata->vif.addr;
255 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
256 sdata->vif.bss_conf.bssid = NULL;
257 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
258 sdata->vif.bss_conf.bssid = zero;
264 switch (sdata->vif.type) {
265 case NL80211_IFTYPE_AP:
266 case NL80211_IFTYPE_ADHOC:
267 case NL80211_IFTYPE_WDS:
268 case NL80211_IFTYPE_MESH_POINT:
271 /* do not warn to simplify caller in scan.c */
272 changed &= ~BSS_CHANGED_BEACON_ENABLED;
273 if (WARN_ON(changed & BSS_CHANGED_BEACON))
278 if (changed & BSS_CHANGED_BEACON_ENABLED) {
279 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
280 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
281 sdata->vif.bss_conf.enable_beacon = false;
284 * Beacon should be enabled, but AP mode must
285 * check whether there is a beacon configured.
287 switch (sdata->vif.type) {
288 case NL80211_IFTYPE_AP:
289 sdata->vif.bss_conf.enable_beacon =
290 !!sdata->u.ap.beacon;
292 case NL80211_IFTYPE_ADHOC:
293 sdata->vif.bss_conf.enable_beacon =
294 !!sdata->u.ibss.presp;
296 #ifdef CONFIG_MAC80211_MESH
297 case NL80211_IFTYPE_MESH_POINT:
298 sdata->vif.bss_conf.enable_beacon =
299 !!sdata->u.mesh.mesh_id_len;
310 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
313 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
315 sdata->vif.bss_conf.use_cts_prot = false;
316 sdata->vif.bss_conf.use_short_preamble = false;
317 sdata->vif.bss_conf.use_short_slot = false;
318 return BSS_CHANGED_ERP_CTS_PROT |
319 BSS_CHANGED_ERP_PREAMBLE |
320 BSS_CHANGED_ERP_SLOT;
323 static void ieee80211_tasklet_handler(unsigned long data)
325 struct ieee80211_local *local = (struct ieee80211_local *) data;
326 struct sta_info *sta, *tmp;
327 struct skb_eosp_msg_data *eosp_data;
330 while ((skb = skb_dequeue(&local->skb_queue)) ||
331 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
332 switch (skb->pkt_type) {
333 case IEEE80211_RX_MSG:
334 /* Clear skb->pkt_type in order to not confuse kernel
337 ieee80211_rx(local_to_hw(local), skb);
339 case IEEE80211_TX_STATUS_MSG:
341 ieee80211_tx_status(local_to_hw(local), skb);
343 case IEEE80211_EOSP_MSG:
344 eosp_data = (void *)skb->cb;
345 for_each_sta_info(local, eosp_data->sta, sta, tmp) {
346 /* skip wrong virtual interface */
347 if (memcmp(eosp_data->iface,
348 sta->sdata->vif.addr, ETH_ALEN))
350 clear_sta_flag(sta, WLAN_STA_SP);
356 WARN(1, "mac80211: Packet is of unknown type %d\n",
364 static void ieee80211_restart_work(struct work_struct *work)
366 struct ieee80211_local *local =
367 container_of(work, struct ieee80211_local, restart_work);
369 /* wait for scan work complete */
370 flush_workqueue(local->workqueue);
372 mutex_lock(&local->mtx);
373 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
374 local->sched_scanning,
375 "%s called with hardware scan in progress\n", __func__);
376 mutex_unlock(&local->mtx);
379 ieee80211_scan_cancel(local);
380 ieee80211_reconfig(local);
384 void ieee80211_restart_hw(struct ieee80211_hw *hw)
386 struct ieee80211_local *local = hw_to_local(hw);
388 trace_api_restart_hw(local);
390 wiphy_info(hw->wiphy,
391 "Hardware restart was requested\n");
393 /* use this reason, ieee80211_reconfig will unblock it */
394 ieee80211_stop_queues_by_reason(hw,
395 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
397 schedule_work(&local->restart_work);
399 EXPORT_SYMBOL(ieee80211_restart_hw);
401 static void ieee80211_recalc_smps_work(struct work_struct *work)
403 struct ieee80211_local *local =
404 container_of(work, struct ieee80211_local, recalc_smps);
406 mutex_lock(&local->iflist_mtx);
407 ieee80211_recalc_smps(local);
408 mutex_unlock(&local->iflist_mtx);
412 static int ieee80211_ifa_changed(struct notifier_block *nb,
413 unsigned long data, void *arg)
415 struct in_ifaddr *ifa = arg;
416 struct ieee80211_local *local =
417 container_of(nb, struct ieee80211_local,
419 struct net_device *ndev = ifa->ifa_dev->dev;
420 struct wireless_dev *wdev = ndev->ieee80211_ptr;
421 struct in_device *idev;
422 struct ieee80211_sub_if_data *sdata;
423 struct ieee80211_bss_conf *bss_conf;
424 struct ieee80211_if_managed *ifmgd;
427 /* Make sure it's our interface that got changed */
431 if (wdev->wiphy != local->hw.wiphy)
434 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
435 bss_conf = &sdata->vif.bss_conf;
437 if (!ieee80211_sdata_running(sdata))
440 /* ARP filtering is only supported in managed mode */
441 if (sdata->vif.type != NL80211_IFTYPE_STATION)
444 idev = __in_dev_get_rtnl(sdata->dev);
448 ifmgd = &sdata->u.mgd;
449 mutex_lock(&ifmgd->mtx);
451 /* Copy the addresses to the bss_conf list */
452 ifa = idev->ifa_list;
453 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
454 bss_conf->arp_addr_list[c] = ifa->ifa_address;
459 /* If not all addresses fit the list, disable filtering */
461 sdata->arp_filter_state = false;
464 sdata->arp_filter_state = true;
466 bss_conf->arp_addr_cnt = c;
468 /* Configure driver only if associated */
469 if (ifmgd->associated) {
470 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
471 ieee80211_bss_info_change_notify(sdata,
472 BSS_CHANGED_ARP_FILTER);
475 mutex_unlock(&ifmgd->mtx);
481 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
483 struct ieee80211_local *local =
484 container_of(napi, struct ieee80211_local, napi);
486 return local->ops->napi_poll(&local->hw, budget);
489 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
491 struct ieee80211_local *local = hw_to_local(hw);
493 napi_schedule(&local->napi);
495 EXPORT_SYMBOL(ieee80211_napi_schedule);
497 void ieee80211_napi_complete(struct ieee80211_hw *hw)
499 struct ieee80211_local *local = hw_to_local(hw);
501 napi_complete(&local->napi);
503 EXPORT_SYMBOL(ieee80211_napi_complete);
505 /* There isn't a lot of sense in it, but you can transmit anything you like */
506 static const struct ieee80211_txrx_stypes
507 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
508 [NL80211_IFTYPE_ADHOC] = {
510 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
512 [NL80211_IFTYPE_STATION] = {
514 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
515 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
517 [NL80211_IFTYPE_AP] = {
519 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
520 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
521 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
522 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
523 BIT(IEEE80211_STYPE_AUTH >> 4) |
524 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
525 BIT(IEEE80211_STYPE_ACTION >> 4),
527 [NL80211_IFTYPE_AP_VLAN] = {
530 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
531 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
532 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
533 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
534 BIT(IEEE80211_STYPE_AUTH >> 4) |
535 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
536 BIT(IEEE80211_STYPE_ACTION >> 4),
538 [NL80211_IFTYPE_P2P_CLIENT] = {
540 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
541 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
543 [NL80211_IFTYPE_P2P_GO] = {
545 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
546 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
547 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
548 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
549 BIT(IEEE80211_STYPE_AUTH >> 4) |
550 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
551 BIT(IEEE80211_STYPE_ACTION >> 4),
553 [NL80211_IFTYPE_MESH_POINT] = {
555 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
556 BIT(IEEE80211_STYPE_AUTH >> 4) |
557 BIT(IEEE80211_STYPE_DEAUTH >> 4),
561 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
562 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
563 IEEE80211_HT_AMPDU_PARM_DENSITY,
565 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
566 IEEE80211_HT_CAP_MAX_AMSDU |
567 IEEE80211_HT_CAP_SGI_40),
569 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
570 0xff, 0xff, 0xff, 0xff, 0xff, },
574 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
575 const struct ieee80211_ops *ops)
577 struct ieee80211_local *local;
581 /* Ensure 32-byte alignment of our private data and hw private data.
582 * We use the wiphy priv data for both our ieee80211_local and for
583 * the driver's private data
585 * In memory it'll be like this:
587 * +-------------------------+
589 * +-------------------------+
590 * | struct ieee80211_local |
591 * +-------------------------+
592 * | driver's private data |
593 * +-------------------------+
596 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
598 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
603 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
605 wiphy->privid = mac80211_wiphy_privid;
607 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
608 WIPHY_FLAG_4ADDR_AP |
609 WIPHY_FLAG_4ADDR_STATION |
610 WIPHY_FLAG_REPORTS_OBSS |
611 WIPHY_FLAG_OFFCHAN_TX |
612 WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
614 wiphy->features = NL80211_FEATURE_SK_TX_STATUS;
617 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
619 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
621 local = wiphy_priv(wiphy);
623 local->hw.wiphy = wiphy;
625 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
627 BUG_ON(!ops->tx && !ops->tx_frags);
630 BUG_ON(!ops->config);
631 BUG_ON(!ops->add_interface);
632 BUG_ON(!ops->remove_interface);
633 BUG_ON(!ops->configure_filter);
636 /* set up some defaults */
637 local->hw.queues = 1;
638 local->hw.max_rates = 1;
639 local->hw.max_report_rates = 0;
640 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
641 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
642 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
643 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
644 local->user_power_level = -1;
645 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
646 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
647 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
649 INIT_LIST_HEAD(&local->interfaces);
651 __hw_addr_init(&local->mc_list);
653 mutex_init(&local->iflist_mtx);
654 mutex_init(&local->mtx);
656 mutex_init(&local->key_mtx);
657 spin_lock_init(&local->filter_lock);
658 spin_lock_init(&local->queue_stop_reason_lock);
661 * The rx_skb_queue is only accessed from tasklets,
662 * but other SKB queues are used from within IRQ
663 * context. Therefore, this one needs a different
664 * locking class so our direct, non-irq-safe use of
665 * the queue's lock doesn't throw lockdep warnings.
667 skb_queue_head_init_class(&local->rx_skb_queue,
668 &ieee80211_rx_skb_queue_class);
670 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
672 ieee80211_work_init(local);
674 INIT_WORK(&local->restart_work, ieee80211_restart_work);
676 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
677 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
678 local->smps_mode = IEEE80211_SMPS_OFF;
680 INIT_WORK(&local->dynamic_ps_enable_work,
681 ieee80211_dynamic_ps_enable_work);
682 INIT_WORK(&local->dynamic_ps_disable_work,
683 ieee80211_dynamic_ps_disable_work);
684 setup_timer(&local->dynamic_ps_timer,
685 ieee80211_dynamic_ps_timer, (unsigned long) local);
687 INIT_WORK(&local->sched_scan_stopped_work,
688 ieee80211_sched_scan_stopped_work);
690 spin_lock_init(&local->ack_status_lock);
691 idr_init(&local->ack_status_frames);
692 /* preallocate at least one entry */
693 idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
695 sta_info_init(local);
697 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
698 skb_queue_head_init(&local->pending[i]);
699 atomic_set(&local->agg_queue_stop[i], 0);
701 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
702 (unsigned long)local);
704 tasklet_init(&local->tasklet,
705 ieee80211_tasklet_handler,
706 (unsigned long) local);
708 skb_queue_head_init(&local->skb_queue);
709 skb_queue_head_init(&local->skb_queue_unreliable);
711 /* init dummy netdev for use w/ NAPI */
712 init_dummy_netdev(&local->napi_dev);
714 ieee80211_led_names(local);
716 ieee80211_hw_roc_setup(local);
718 return local_to_hw(local);
720 EXPORT_SYMBOL(ieee80211_alloc_hw);
722 int ieee80211_register_hw(struct ieee80211_hw *hw)
724 struct ieee80211_local *local = hw_to_local(hw);
726 enum ieee80211_band band;
727 int channels, max_bitrates;
729 static const u32 cipher_suites[] = {
730 /* keep WEP first, it may be removed below */
731 WLAN_CIPHER_SUITE_WEP40,
732 WLAN_CIPHER_SUITE_WEP104,
733 WLAN_CIPHER_SUITE_TKIP,
734 WLAN_CIPHER_SUITE_CCMP,
736 /* keep last -- depends on hw flags! */
737 WLAN_CIPHER_SUITE_AES_CMAC
740 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)
742 && (!local->ops->suspend || !local->ops->resume)
747 if (hw->max_report_rates == 0)
748 hw->max_report_rates = hw->max_rates;
751 * generic code guarantees at least one band,
752 * set this very early because much code assumes
753 * that hw.conf.channel is assigned
758 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
759 struct ieee80211_supported_band *sband;
761 sband = local->hw.wiphy->bands[band];
764 if (!local->oper_channel) {
765 /* init channel we're on */
766 local->hw.conf.channel =
767 local->oper_channel = &sband->channels[0];
768 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
770 channels += sband->n_channels;
772 if (max_bitrates < sband->n_bitrates)
773 max_bitrates = sband->n_bitrates;
774 supp_ht = supp_ht || sband->ht_cap.ht_supported;
777 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
778 sizeof(void *) * channels, GFP_KERNEL);
779 if (!local->int_scan_req)
782 /* if low-level driver supports AP, we also support VLAN */
783 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
784 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
785 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
788 /* mac80211 always supports monitor */
789 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
790 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
793 * mac80211 doesn't support more than 1 channel, and also not more
794 * than one IBSS interface
796 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
797 const struct ieee80211_iface_combination *c;
800 c = &hw->wiphy->iface_combinations[i];
802 if (c->num_different_channels > 1)
805 for (j = 0; j < c->n_limits; j++)
806 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
807 c->limits[j].max > 1)
811 #ifndef CONFIG_MAC80211_MESH
812 /* mesh depends on Kconfig, but drivers should set it if they want */
813 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
816 /* if the underlying driver supports mesh, mac80211 will (at least)
817 * provide routing of mesh authentication frames to userspace */
818 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
819 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
821 /* mac80211 supports control port protocol changing */
822 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
824 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
825 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
826 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
827 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
829 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
830 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
831 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
834 * Calculate scan IE length -- we need this to alloc
835 * memory and to subtract from the driver limit. It
836 * includes the DS Params, (extended) supported rates, and HT
837 * information -- SSID is the driver's responsibility.
839 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
842 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
844 if (!local->ops->hw_scan) {
845 /* For hw_scan, driver needs to set these up. */
846 local->hw.wiphy->max_scan_ssids = 4;
847 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
851 * If the driver supports any scan IEs, then assume the
852 * limit includes the IEs mac80211 will add, otherwise
853 * leave it at zero and let the driver sort it out; we
854 * still pass our IEs to the driver but userspace will
855 * not be allowed to in that case.
857 if (local->hw.wiphy->max_scan_ie_len)
858 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
860 /* Set up cipher suites unless driver already did */
861 if (!local->hw.wiphy->cipher_suites) {
862 local->hw.wiphy->cipher_suites = cipher_suites;
863 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
864 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
865 local->hw.wiphy->n_cipher_suites--;
867 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
868 if (local->hw.wiphy->cipher_suites == cipher_suites) {
869 local->hw.wiphy->cipher_suites += 2;
870 local->hw.wiphy->n_cipher_suites -= 2;
878 local->hw.wiphy->cipher_suites,
879 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
883 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
884 u32 suite = local->hw.wiphy->cipher_suites[r];
885 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
886 suite == WLAN_CIPHER_SUITE_WEP104)
890 local->hw.wiphy->cipher_suites = suites;
891 local->hw.wiphy->n_cipher_suites = w;
892 local->wiphy_ciphers_allocated = true;
896 if (!local->ops->remain_on_channel)
897 local->hw.wiphy->max_remain_on_channel_duration = 5000;
899 if (local->ops->sched_scan_start)
900 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
902 /* mac80211 based drivers don't support internal TDLS setup */
903 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
904 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
906 result = wiphy_register(local->hw.wiphy);
908 goto fail_wiphy_register;
911 * We use the number of queues for feature tests (QoS, HT) internally
912 * so restrict them appropriately.
914 if (hw->queues > IEEE80211_MAX_QUEUES)
915 hw->queues = IEEE80211_MAX_QUEUES;
918 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
919 if (!local->workqueue) {
925 * The hardware needs headroom for sending the frame,
926 * and we need some headroom for passing the frame to monitor
927 * interfaces, but never both at the same time.
929 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
930 IEEE80211_TX_STATUS_HEADROOM);
932 debugfs_hw_add(local);
935 * if the driver doesn't specify a max listen interval we
936 * use 5 which should be a safe default
938 if (local->hw.max_listen_interval == 0)
939 local->hw.max_listen_interval = 5;
941 local->hw.conf.listen_interval = local->hw.max_listen_interval;
943 local->dynamic_ps_forced_timeout = -1;
945 result = ieee80211_wep_init(local);
947 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
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 ieee80211_led_init(local);
973 local->network_latency_notifier.notifier_call =
974 ieee80211_max_network_latency;
975 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
976 &local->network_latency_notifier);
983 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
984 result = register_inetaddr_notifier(&local->ifa_notifier);
989 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
990 local->hw.napi_weight);
996 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
997 &local->network_latency_notifier);
1001 ieee80211_led_exit(local);
1002 ieee80211_remove_interfaces(local);
1005 ieee80211_wep_free(local);
1006 sta_info_stop(local);
1007 destroy_workqueue(local->workqueue);
1009 wiphy_unregister(local->hw.wiphy);
1010 fail_wiphy_register:
1011 if (local->wiphy_ciphers_allocated)
1012 kfree(local->hw.wiphy->cipher_suites);
1013 kfree(local->int_scan_req);
1016 EXPORT_SYMBOL(ieee80211_register_hw);
1018 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1020 struct ieee80211_local *local = hw_to_local(hw);
1022 tasklet_kill(&local->tx_pending_tasklet);
1023 tasklet_kill(&local->tasklet);
1025 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1026 &local->network_latency_notifier);
1028 unregister_inetaddr_notifier(&local->ifa_notifier);
1034 * At this point, interface list manipulations are fine
1035 * because the driver cannot be handing us frames any
1036 * more and the tasklet is killed.
1038 ieee80211_remove_interfaces(local);
1043 * Now all work items will be gone, but the
1044 * timer might still be armed, so delete it
1046 del_timer_sync(&local->work_timer);
1048 cancel_work_sync(&local->restart_work);
1049 cancel_work_sync(&local->reconfig_filter);
1051 ieee80211_clear_tx_pending(local);
1052 rate_control_deinitialize(local);
1054 if (skb_queue_len(&local->skb_queue) ||
1055 skb_queue_len(&local->skb_queue_unreliable))
1056 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1057 skb_queue_purge(&local->skb_queue);
1058 skb_queue_purge(&local->skb_queue_unreliable);
1059 skb_queue_purge(&local->rx_skb_queue);
1061 destroy_workqueue(local->workqueue);
1062 wiphy_unregister(local->hw.wiphy);
1063 sta_info_stop(local);
1064 ieee80211_wep_free(local);
1065 ieee80211_led_exit(local);
1066 kfree(local->int_scan_req);
1068 EXPORT_SYMBOL(ieee80211_unregister_hw);
1070 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1072 WARN_ONCE(1, "Have pending ack frames!\n");
1077 void ieee80211_free_hw(struct ieee80211_hw *hw)
1079 struct ieee80211_local *local = hw_to_local(hw);
1081 mutex_destroy(&local->iflist_mtx);
1082 mutex_destroy(&local->mtx);
1084 if (local->wiphy_ciphers_allocated)
1085 kfree(local->hw.wiphy->cipher_suites);
1087 idr_for_each(&local->ack_status_frames,
1088 ieee80211_free_ack_frame, NULL);
1089 idr_destroy(&local->ack_status_frames);
1091 wiphy_free(local->hw.wiphy);
1093 EXPORT_SYMBOL(ieee80211_free_hw);
1095 static int __init ieee80211_init(void)
1097 struct sk_buff *skb;
1100 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1101 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1102 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1104 ret = rc80211_minstrel_init();
1108 ret = rc80211_minstrel_ht_init();
1112 ret = rc80211_pid_init();
1116 ret = ieee80211_iface_init();
1124 rc80211_minstrel_ht_exit();
1126 rc80211_minstrel_exit();
1131 static void __exit ieee80211_exit(void)
1134 rc80211_minstrel_ht_exit();
1135 rc80211_minstrel_exit();
1140 ieee80211_iface_exit();
1146 subsys_initcall(ieee80211_init);
1147 module_exit(ieee80211_exit);
1149 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1150 MODULE_LICENSE("GPL");