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_params.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"
37 bool ieee80211_disable_40mhz_24ghz;
38 module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
39 MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
40 "Disable 40MHz support in the 2.4GHz band");
42 void ieee80211_configure_filter(struct ieee80211_local *local)
45 unsigned int changed_flags;
46 unsigned int new_flags = 0;
48 if (atomic_read(&local->iff_promiscs))
49 new_flags |= FIF_PROMISC_IN_BSS;
51 if (atomic_read(&local->iff_allmultis))
52 new_flags |= FIF_ALLMULTI;
54 if (local->monitors || local->scanning)
55 new_flags |= FIF_BCN_PRBRESP_PROMISC;
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, *scan_chan;
101 enum nl80211_channel_type channel_type;
106 scan_chan = local->scan_channel;
108 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
111 channel_type = NL80211_CHAN_NO_HT;
112 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
113 } else if (local->tmp_channel &&
114 local->oper_channel != local->tmp_channel) {
115 chan = scan_chan = local->tmp_channel;
116 channel_type = local->tmp_channel_type;
117 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
119 chan = local->oper_channel;
120 channel_type = local->_oper_channel_type;
121 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
123 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
125 if (offchannel_flag || chan != local->hw.conf.channel ||
126 channel_type != local->hw.conf.channel_type) {
127 local->hw.conf.channel = chan;
128 local->hw.conf.channel_type = channel_type;
129 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 if (!conf_is_ht(&local->hw.conf)) {
134 * mac80211.h documents that this is only valid
135 * when the channel is set to an HT type, and
136 * that otherwise STATIC is used.
138 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
139 } else if (local->hw.conf.smps_mode != local->smps_mode) {
140 local->hw.conf.smps_mode = local->smps_mode;
141 changed |= IEEE80211_CONF_CHANGE_SMPS;
145 power = chan->max_power;
147 power = local->power_constr_level ?
148 (chan->max_power - local->power_constr_level) :
151 if (local->user_power_level >= 0)
152 power = min(power, local->user_power_level);
154 if (local->hw.conf.power_level != power) {
155 changed |= IEEE80211_CONF_CHANGE_POWER;
156 local->hw.conf.power_level = power;
159 if (changed && local->open_count) {
160 ret = drv_config(local, changed);
163 * HW reconfiguration should never fail, the driver has told
164 * us what it can support so it should live up to that promise.
167 * rfkill is not integrated with mac80211 and a
168 * configuration command can thus fail if hardware rfkill
171 * FIXME: integrate rfkill with mac80211 and then add this
181 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
184 struct ieee80211_local *local = sdata->local;
185 static const u8 zero[ETH_ALEN] = { 0 };
190 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
192 * While not associated, claim a BSSID of all-zeroes
193 * so that drivers don't do any weird things with the
194 * BSSID at that time.
196 if (sdata->vif.bss_conf.assoc)
197 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
199 sdata->vif.bss_conf.bssid = zero;
200 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
201 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
202 else if (sdata->vif.type == NL80211_IFTYPE_AP)
203 sdata->vif.bss_conf.bssid = sdata->vif.addr;
204 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
205 sdata->vif.bss_conf.bssid = zero;
211 switch (sdata->vif.type) {
212 case NL80211_IFTYPE_AP:
213 case NL80211_IFTYPE_ADHOC:
214 case NL80211_IFTYPE_MESH_POINT:
217 /* do not warn to simplify caller in scan.c */
218 changed &= ~BSS_CHANGED_BEACON_ENABLED;
219 if (WARN_ON(changed & BSS_CHANGED_BEACON))
224 if (changed & BSS_CHANGED_BEACON_ENABLED) {
225 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
226 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
227 sdata->vif.bss_conf.enable_beacon = false;
230 * Beacon should be enabled, but AP mode must
231 * check whether there is a beacon configured.
233 switch (sdata->vif.type) {
234 case NL80211_IFTYPE_AP:
235 sdata->vif.bss_conf.enable_beacon =
236 !!sdata->u.ap.beacon;
238 case NL80211_IFTYPE_ADHOC:
239 sdata->vif.bss_conf.enable_beacon =
240 !!sdata->u.ibss.presp;
242 case NL80211_IFTYPE_MESH_POINT:
243 sdata->vif.bss_conf.enable_beacon = true;
253 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
256 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
258 sdata->vif.bss_conf.use_cts_prot = false;
259 sdata->vif.bss_conf.use_short_preamble = false;
260 sdata->vif.bss_conf.use_short_slot = false;
261 return BSS_CHANGED_ERP_CTS_PROT |
262 BSS_CHANGED_ERP_PREAMBLE |
263 BSS_CHANGED_ERP_SLOT;
266 static void ieee80211_tasklet_handler(unsigned long data)
268 struct ieee80211_local *local = (struct ieee80211_local *) data;
271 while ((skb = skb_dequeue(&local->skb_queue)) ||
272 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
273 switch (skb->pkt_type) {
274 case IEEE80211_RX_MSG:
275 /* Clear skb->pkt_type in order to not confuse kernel
278 ieee80211_rx(local_to_hw(local), skb);
280 case IEEE80211_TX_STATUS_MSG:
282 ieee80211_tx_status(local_to_hw(local), skb);
285 WARN(1, "mac80211: Packet is of unknown type %d\n",
293 static void ieee80211_restart_work(struct work_struct *work)
295 struct ieee80211_local *local =
296 container_of(work, struct ieee80211_local, restart_work);
299 ieee80211_reconfig(local);
303 void ieee80211_restart_hw(struct ieee80211_hw *hw)
305 struct ieee80211_local *local = hw_to_local(hw);
307 trace_api_restart_hw(local);
309 /* wait for scan work complete */
310 flush_workqueue(local->workqueue);
312 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
313 "%s called with hardware scan in progress\n", __func__);
315 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)))
316 ieee80211_scan_cancel(local);
318 /* use this reason, ieee80211_reconfig will unblock it */
319 ieee80211_stop_queues_by_reason(hw,
320 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
322 schedule_work(&local->restart_work);
324 EXPORT_SYMBOL(ieee80211_restart_hw);
326 static void ieee80211_recalc_smps_work(struct work_struct *work)
328 struct ieee80211_local *local =
329 container_of(work, struct ieee80211_local, recalc_smps);
331 mutex_lock(&local->iflist_mtx);
332 ieee80211_recalc_smps(local, NULL);
333 mutex_unlock(&local->iflist_mtx);
337 static int ieee80211_ifa_changed(struct notifier_block *nb,
338 unsigned long data, void *arg)
340 struct in_ifaddr *ifa = arg;
341 struct ieee80211_local *local =
342 container_of(nb, struct ieee80211_local,
344 struct net_device *ndev = ifa->ifa_dev->dev;
345 struct wireless_dev *wdev = ndev->ieee80211_ptr;
346 struct in_device *idev;
347 struct ieee80211_sub_if_data *sdata;
348 struct ieee80211_bss_conf *bss_conf;
349 struct ieee80211_if_managed *ifmgd;
352 /* Make sure it's our interface that got changed */
356 if (wdev->wiphy != local->hw.wiphy)
359 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
360 bss_conf = &sdata->vif.bss_conf;
362 if (!ieee80211_sdata_running(sdata))
365 /* ARP filtering is only supported in managed mode */
366 if (sdata->vif.type != NL80211_IFTYPE_STATION)
369 idev = __in_dev_get_rtnl(sdata->dev);
373 ifmgd = &sdata->u.mgd;
374 mutex_lock(&ifmgd->mtx);
376 /* Copy the addresses to the bss_conf list */
377 ifa = idev->ifa_list;
378 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
379 bss_conf->arp_addr_list[c] = ifa->ifa_address;
384 /* If not all addresses fit the list, disable filtering */
386 sdata->arp_filter_state = false;
389 sdata->arp_filter_state = true;
391 bss_conf->arp_addr_cnt = c;
393 /* Configure driver only if associated */
394 if (ifmgd->associated) {
395 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
396 ieee80211_bss_info_change_notify(sdata,
397 BSS_CHANGED_ARP_FILTER);
400 mutex_unlock(&ifmgd->mtx);
406 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
408 struct ieee80211_local *local =
409 container_of(napi, struct ieee80211_local, napi);
411 return local->ops->napi_poll(&local->hw, budget);
414 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
416 struct ieee80211_local *local = hw_to_local(hw);
418 napi_schedule(&local->napi);
420 EXPORT_SYMBOL(ieee80211_napi_schedule);
422 void ieee80211_napi_complete(struct ieee80211_hw *hw)
424 struct ieee80211_local *local = hw_to_local(hw);
426 napi_complete(&local->napi);
428 EXPORT_SYMBOL(ieee80211_napi_complete);
430 /* There isn't a lot of sense in it, but you can transmit anything you like */
431 static const struct ieee80211_txrx_stypes
432 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
433 [NL80211_IFTYPE_ADHOC] = {
435 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
437 [NL80211_IFTYPE_STATION] = {
439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
442 [NL80211_IFTYPE_AP] = {
444 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
445 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
447 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
448 BIT(IEEE80211_STYPE_AUTH >> 4) |
449 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
450 BIT(IEEE80211_STYPE_ACTION >> 4),
452 [NL80211_IFTYPE_AP_VLAN] = {
455 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
457 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
458 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
459 BIT(IEEE80211_STYPE_AUTH >> 4) |
460 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
461 BIT(IEEE80211_STYPE_ACTION >> 4),
463 [NL80211_IFTYPE_P2P_CLIENT] = {
465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
466 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
468 [NL80211_IFTYPE_P2P_GO] = {
470 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
471 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
473 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
474 BIT(IEEE80211_STYPE_AUTH >> 4) |
475 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
476 BIT(IEEE80211_STYPE_ACTION >> 4),
480 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
481 const struct ieee80211_ops *ops)
483 struct ieee80211_local *local;
487 /* Ensure 32-byte alignment of our private data and hw private data.
488 * We use the wiphy priv data for both our ieee80211_local and for
489 * the driver's private data
491 * In memory it'll be like this:
493 * +-------------------------+
495 * +-------------------------+
496 * | struct ieee80211_local |
497 * +-------------------------+
498 * | driver's private data |
499 * +-------------------------+
502 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
504 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
509 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
511 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
512 WIPHY_FLAG_4ADDR_AP |
513 WIPHY_FLAG_4ADDR_STATION;
514 wiphy->privid = mac80211_wiphy_privid;
516 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
518 local = wiphy_priv(wiphy);
520 local->hw.wiphy = wiphy;
522 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
527 BUG_ON(!ops->config);
528 BUG_ON(!ops->add_interface);
529 BUG_ON(!ops->remove_interface);
530 BUG_ON(!ops->configure_filter);
533 /* set up some defaults */
534 local->hw.queues = 1;
535 local->hw.max_rates = 1;
536 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
537 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
538 local->user_power_level = -1;
539 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
540 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
542 INIT_LIST_HEAD(&local->interfaces);
544 __hw_addr_init(&local->mc_list);
546 mutex_init(&local->iflist_mtx);
547 mutex_init(&local->mtx);
549 mutex_init(&local->key_mtx);
550 spin_lock_init(&local->filter_lock);
551 spin_lock_init(&local->queue_stop_reason_lock);
553 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
555 ieee80211_work_init(local);
557 INIT_WORK(&local->restart_work, ieee80211_restart_work);
559 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
560 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
561 local->smps_mode = IEEE80211_SMPS_OFF;
563 INIT_WORK(&local->dynamic_ps_enable_work,
564 ieee80211_dynamic_ps_enable_work);
565 INIT_WORK(&local->dynamic_ps_disable_work,
566 ieee80211_dynamic_ps_disable_work);
567 setup_timer(&local->dynamic_ps_timer,
568 ieee80211_dynamic_ps_timer, (unsigned long) local);
570 sta_info_init(local);
572 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
573 skb_queue_head_init(&local->pending[i]);
574 atomic_set(&local->agg_queue_stop[i], 0);
576 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
577 (unsigned long)local);
579 tasklet_init(&local->tasklet,
580 ieee80211_tasklet_handler,
581 (unsigned long) local);
583 skb_queue_head_init(&local->skb_queue);
584 skb_queue_head_init(&local->skb_queue_unreliable);
586 /* init dummy netdev for use w/ NAPI */
587 init_dummy_netdev(&local->napi_dev);
589 return local_to_hw(local);
591 EXPORT_SYMBOL(ieee80211_alloc_hw);
593 int ieee80211_register_hw(struct ieee80211_hw *hw)
595 struct ieee80211_local *local = hw_to_local(hw);
597 enum ieee80211_band band;
598 int channels, max_bitrates;
600 static const u32 cipher_suites[] = {
601 /* keep WEP first, it may be removed below */
602 WLAN_CIPHER_SUITE_WEP40,
603 WLAN_CIPHER_SUITE_WEP104,
604 WLAN_CIPHER_SUITE_TKIP,
605 WLAN_CIPHER_SUITE_CCMP,
607 /* keep last -- depends on hw flags! */
608 WLAN_CIPHER_SUITE_AES_CMAC
612 * generic code guarantees at least one band,
613 * set this very early because much code assumes
614 * that hw.conf.channel is assigned
619 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
620 struct ieee80211_supported_band *sband;
622 sband = local->hw.wiphy->bands[band];
625 if (!local->oper_channel) {
626 /* init channel we're on */
627 local->hw.conf.channel =
628 local->oper_channel = &sband->channels[0];
629 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
631 channels += sband->n_channels;
633 if (max_bitrates < sband->n_bitrates)
634 max_bitrates = sband->n_bitrates;
635 supp_ht = supp_ht || sband->ht_cap.ht_supported;
638 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
639 sizeof(void *) * channels, GFP_KERNEL);
640 if (!local->int_scan_req)
643 /* if low-level driver supports AP, we also support VLAN */
644 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
645 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
647 /* mac80211 always supports monitor */
648 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
650 #ifndef CONFIG_MAC80211_MESH
651 /* mesh depends on Kconfig, but drivers should set it if they want */
652 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
655 /* mac80211 supports control port protocol changing */
656 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
658 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
659 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
660 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
661 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
663 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
664 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
665 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
668 * Calculate scan IE length -- we need this to alloc
669 * memory and to subtract from the driver limit. It
670 * includes the (extended) supported rates and HT
671 * information -- SSID is the driver's responsibility.
673 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
675 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
677 if (!local->ops->hw_scan) {
678 /* For hw_scan, driver needs to set these up. */
679 local->hw.wiphy->max_scan_ssids = 4;
680 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
684 * If the driver supports any scan IEs, then assume the
685 * limit includes the IEs mac80211 will add, otherwise
686 * leave it at zero and let the driver sort it out; we
687 * still pass our IEs to the driver but userspace will
688 * not be allowed to in that case.
690 if (local->hw.wiphy->max_scan_ie_len)
691 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
693 /* Set up cipher suites unless driver already did */
694 if (!local->hw.wiphy->cipher_suites) {
695 local->hw.wiphy->cipher_suites = cipher_suites;
696 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
697 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
698 local->hw.wiphy->n_cipher_suites--;
700 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
701 if (local->hw.wiphy->cipher_suites == cipher_suites) {
702 local->hw.wiphy->cipher_suites += 2;
703 local->hw.wiphy->n_cipher_suites -= 2;
711 local->hw.wiphy->cipher_suites,
712 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
716 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
717 u32 suite = local->hw.wiphy->cipher_suites[r];
718 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
719 suite == WLAN_CIPHER_SUITE_WEP104)
723 local->hw.wiphy->cipher_suites = suites;
724 local->hw.wiphy->n_cipher_suites = w;
725 local->wiphy_ciphers_allocated = true;
729 result = wiphy_register(local->hw.wiphy);
731 goto fail_wiphy_register;
734 * We use the number of queues for feature tests (QoS, HT) internally
735 * so restrict them appropriately.
737 if (hw->queues > IEEE80211_MAX_QUEUES)
738 hw->queues = IEEE80211_MAX_QUEUES;
741 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
742 if (!local->workqueue) {
748 * The hardware needs headroom for sending the frame,
749 * and we need some headroom for passing the frame to monitor
750 * interfaces, but never both at the same time.
752 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
753 sizeof(struct ieee80211_tx_status_rtap_hdr));
754 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
755 sizeof(struct ieee80211_tx_status_rtap_hdr));
757 debugfs_hw_add(local);
760 * if the driver doesn't specify a max listen interval we
761 * use 5 which should be a safe default
763 if (local->hw.max_listen_interval == 0)
764 local->hw.max_listen_interval = 5;
766 local->hw.conf.listen_interval = local->hw.max_listen_interval;
768 local->dynamic_ps_forced_timeout = -1;
770 result = sta_info_start(local);
774 result = ieee80211_wep_init(local);
776 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
781 result = ieee80211_init_rate_ctrl_alg(local,
782 hw->rate_control_algorithm);
784 wiphy_debug(local->hw.wiphy,
785 "Failed to initialize rate control algorithm\n");
789 /* add one default STA interface if supported */
790 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
791 result = ieee80211_if_add(local, "wlan%d", NULL,
792 NL80211_IFTYPE_STATION, NULL);
794 wiphy_warn(local->hw.wiphy,
795 "Failed to add default virtual iface\n");
800 ieee80211_led_init(local);
802 local->network_latency_notifier.notifier_call =
803 ieee80211_max_network_latency;
804 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
805 &local->network_latency_notifier);
812 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
813 result = register_inetaddr_notifier(&local->ifa_notifier);
818 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
819 local->hw.napi_weight);
825 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
826 &local->network_latency_notifier);
830 ieee80211_led_exit(local);
831 ieee80211_remove_interfaces(local);
834 ieee80211_wep_free(local);
835 sta_info_stop(local);
837 destroy_workqueue(local->workqueue);
839 wiphy_unregister(local->hw.wiphy);
841 if (local->wiphy_ciphers_allocated)
842 kfree(local->hw.wiphy->cipher_suites);
843 kfree(local->int_scan_req);
846 EXPORT_SYMBOL(ieee80211_register_hw);
848 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
850 struct ieee80211_local *local = hw_to_local(hw);
852 tasklet_kill(&local->tx_pending_tasklet);
853 tasklet_kill(&local->tasklet);
855 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
856 &local->network_latency_notifier);
858 unregister_inetaddr_notifier(&local->ifa_notifier);
864 * At this point, interface list manipulations are fine
865 * because the driver cannot be handing us frames any
866 * more and the tasklet is killed.
868 ieee80211_remove_interfaces(local);
873 * Now all work items will be gone, but the
874 * timer might still be armed, so delete it
876 del_timer_sync(&local->work_timer);
878 cancel_work_sync(&local->restart_work);
879 cancel_work_sync(&local->reconfig_filter);
881 ieee80211_clear_tx_pending(local);
882 sta_info_stop(local);
883 rate_control_deinitialize(local);
885 if (skb_queue_len(&local->skb_queue) ||
886 skb_queue_len(&local->skb_queue_unreliable))
887 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
888 skb_queue_purge(&local->skb_queue);
889 skb_queue_purge(&local->skb_queue_unreliable);
891 destroy_workqueue(local->workqueue);
892 wiphy_unregister(local->hw.wiphy);
893 ieee80211_wep_free(local);
894 ieee80211_led_exit(local);
895 kfree(local->int_scan_req);
897 EXPORT_SYMBOL(ieee80211_unregister_hw);
899 void ieee80211_free_hw(struct ieee80211_hw *hw)
901 struct ieee80211_local *local = hw_to_local(hw);
903 mutex_destroy(&local->iflist_mtx);
904 mutex_destroy(&local->mtx);
906 if (local->wiphy_ciphers_allocated)
907 kfree(local->hw.wiphy->cipher_suites);
909 wiphy_free(local->hw.wiphy);
911 EXPORT_SYMBOL(ieee80211_free_hw);
913 static int __init ieee80211_init(void)
918 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
919 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
920 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
922 ret = rc80211_minstrel_init();
926 ret = rc80211_minstrel_ht_init();
930 ret = rc80211_pid_init();
934 ret = ieee80211_iface_init();
942 rc80211_minstrel_ht_exit();
944 rc80211_minstrel_exit();
949 static void __exit ieee80211_exit(void)
952 rc80211_minstrel_ht_exit();
953 rc80211_minstrel_exit();
956 * For key todo, it'll be empty by now but the work
957 * might still be scheduled.
959 flush_scheduled_work();
964 ieee80211_iface_exit();
968 subsys_initcall(ieee80211_init);
969 module_exit(ieee80211_exit);
971 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
972 MODULE_LICENSE("GPL");