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_probe_req || local->probe_req_reg)
58 new_flags |= FIF_PROBE_REQ;
60 if (local->fif_fcsfail)
61 new_flags |= FIF_FCSFAIL;
63 if (local->fif_plcpfail)
64 new_flags |= FIF_PLCPFAIL;
66 if (local->fif_control)
67 new_flags |= FIF_CONTROL;
69 if (local->fif_other_bss)
70 new_flags |= FIF_OTHER_BSS;
72 if (local->fif_pspoll)
73 new_flags |= FIF_PSPOLL;
75 spin_lock_bh(&local->filter_lock);
76 changed_flags = local->filter_flags ^ new_flags;
78 mc = drv_prepare_multicast(local, &local->mc_list);
79 spin_unlock_bh(&local->filter_lock);
84 drv_configure_filter(local, changed_flags, &new_flags, mc);
86 WARN_ON(new_flags & (1<<31));
88 local->filter_flags = new_flags & ~(1<<31);
91 static void ieee80211_reconfig_filter(struct work_struct *work)
93 struct ieee80211_local *local =
94 container_of(work, struct ieee80211_local, reconfig_filter);
96 ieee80211_configure_filter(local);
99 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
101 struct ieee80211_channel *chan, *scan_chan;
104 enum nl80211_channel_type channel_type;
109 scan_chan = local->scan_channel;
111 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
114 channel_type = NL80211_CHAN_NO_HT;
115 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
116 } else if (local->tmp_channel &&
117 local->oper_channel != local->tmp_channel) {
118 chan = scan_chan = local->tmp_channel;
119 channel_type = local->tmp_channel_type;
120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 chan = local->oper_channel;
123 channel_type = local->_oper_channel_type;
124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
128 if (offchannel_flag || chan != local->hw.conf.channel ||
129 channel_type != local->hw.conf.channel_type) {
130 local->hw.conf.channel = chan;
131 local->hw.conf.channel_type = channel_type;
132 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
135 if (!conf_is_ht(&local->hw.conf)) {
137 * mac80211.h documents that this is only valid
138 * when the channel is set to an HT type, and
139 * that otherwise STATIC is used.
141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
142 } else if (local->hw.conf.smps_mode != local->smps_mode) {
143 local->hw.conf.smps_mode = local->smps_mode;
144 changed |= IEEE80211_CONF_CHANGE_SMPS;
148 power = chan->max_power;
150 power = local->power_constr_level ?
151 (chan->max_power - local->power_constr_level) :
154 if (local->user_power_level >= 0)
155 power = min(power, local->user_power_level);
157 if (local->hw.conf.power_level != power) {
158 changed |= IEEE80211_CONF_CHANGE_POWER;
159 local->hw.conf.power_level = power;
162 if (changed && local->open_count) {
163 ret = drv_config(local, changed);
166 * HW reconfiguration should never fail, the driver has told
167 * us what it can support so it should live up to that promise.
170 * rfkill is not integrated with mac80211 and a
171 * configuration command can thus fail if hardware rfkill
174 * FIXME: integrate rfkill with mac80211 and then add this
184 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
187 struct ieee80211_local *local = sdata->local;
188 static const u8 zero[ETH_ALEN] = { 0 };
193 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
195 * While not associated, claim a BSSID of all-zeroes
196 * so that drivers don't do any weird things with the
197 * BSSID at that time.
199 if (sdata->vif.bss_conf.assoc)
200 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
202 sdata->vif.bss_conf.bssid = zero;
203 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
204 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
205 else if (sdata->vif.type == NL80211_IFTYPE_AP)
206 sdata->vif.bss_conf.bssid = sdata->vif.addr;
207 else if (sdata->vif.type == NL80211_IFTYPE_WDS)
208 sdata->vif.bss_conf.bssid = NULL;
209 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
210 sdata->vif.bss_conf.bssid = zero;
216 switch (sdata->vif.type) {
217 case NL80211_IFTYPE_AP:
218 case NL80211_IFTYPE_ADHOC:
219 case NL80211_IFTYPE_WDS:
220 case NL80211_IFTYPE_MESH_POINT:
223 /* do not warn to simplify caller in scan.c */
224 changed &= ~BSS_CHANGED_BEACON_ENABLED;
225 if (WARN_ON(changed & BSS_CHANGED_BEACON))
230 if (changed & BSS_CHANGED_BEACON_ENABLED) {
231 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
232 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
233 sdata->vif.bss_conf.enable_beacon = false;
236 * Beacon should be enabled, but AP mode must
237 * check whether there is a beacon configured.
239 switch (sdata->vif.type) {
240 case NL80211_IFTYPE_AP:
241 sdata->vif.bss_conf.enable_beacon =
242 !!sdata->u.ap.beacon;
244 case NL80211_IFTYPE_ADHOC:
245 sdata->vif.bss_conf.enable_beacon =
246 !!sdata->u.ibss.presp;
248 case NL80211_IFTYPE_MESH_POINT:
249 sdata->vif.bss_conf.enable_beacon = true;
259 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
262 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
264 sdata->vif.bss_conf.use_cts_prot = false;
265 sdata->vif.bss_conf.use_short_preamble = false;
266 sdata->vif.bss_conf.use_short_slot = false;
267 return BSS_CHANGED_ERP_CTS_PROT |
268 BSS_CHANGED_ERP_PREAMBLE |
269 BSS_CHANGED_ERP_SLOT;
272 static void ieee80211_tasklet_handler(unsigned long data)
274 struct ieee80211_local *local = (struct ieee80211_local *) data;
277 while ((skb = skb_dequeue(&local->skb_queue)) ||
278 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
279 switch (skb->pkt_type) {
280 case IEEE80211_RX_MSG:
281 /* Clear skb->pkt_type in order to not confuse kernel
284 ieee80211_rx(local_to_hw(local), skb);
286 case IEEE80211_TX_STATUS_MSG:
288 ieee80211_tx_status(local_to_hw(local), skb);
291 WARN(1, "mac80211: Packet is of unknown type %d\n",
299 static void ieee80211_restart_work(struct work_struct *work)
301 struct ieee80211_local *local =
302 container_of(work, struct ieee80211_local, restart_work);
304 /* wait for scan work complete */
305 flush_workqueue(local->workqueue);
307 mutex_lock(&local->mtx);
308 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
309 "%s called with hardware scan in progress\n", __func__);
310 mutex_unlock(&local->mtx);
313 ieee80211_scan_cancel(local);
314 ieee80211_reconfig(local);
318 void ieee80211_restart_hw(struct ieee80211_hw *hw)
320 struct ieee80211_local *local = hw_to_local(hw);
322 trace_api_restart_hw(local);
324 /* use this reason, ieee80211_reconfig will unblock it */
325 ieee80211_stop_queues_by_reason(hw,
326 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
328 schedule_work(&local->restart_work);
330 EXPORT_SYMBOL(ieee80211_restart_hw);
332 static void ieee80211_recalc_smps_work(struct work_struct *work)
334 struct ieee80211_local *local =
335 container_of(work, struct ieee80211_local, recalc_smps);
337 mutex_lock(&local->iflist_mtx);
338 ieee80211_recalc_smps(local);
339 mutex_unlock(&local->iflist_mtx);
343 static int ieee80211_ifa_changed(struct notifier_block *nb,
344 unsigned long data, void *arg)
346 struct in_ifaddr *ifa = arg;
347 struct ieee80211_local *local =
348 container_of(nb, struct ieee80211_local,
350 struct net_device *ndev = ifa->ifa_dev->dev;
351 struct wireless_dev *wdev = ndev->ieee80211_ptr;
352 struct in_device *idev;
353 struct ieee80211_sub_if_data *sdata;
354 struct ieee80211_bss_conf *bss_conf;
355 struct ieee80211_if_managed *ifmgd;
358 /* Make sure it's our interface that got changed */
362 if (wdev->wiphy != local->hw.wiphy)
365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366 bss_conf = &sdata->vif.bss_conf;
368 if (!ieee80211_sdata_running(sdata))
371 /* ARP filtering is only supported in managed mode */
372 if (sdata->vif.type != NL80211_IFTYPE_STATION)
375 idev = __in_dev_get_rtnl(sdata->dev);
379 ifmgd = &sdata->u.mgd;
380 mutex_lock(&ifmgd->mtx);
382 /* Copy the addresses to the bss_conf list */
383 ifa = idev->ifa_list;
384 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
385 bss_conf->arp_addr_list[c] = ifa->ifa_address;
390 /* If not all addresses fit the list, disable filtering */
392 sdata->arp_filter_state = false;
395 sdata->arp_filter_state = true;
397 bss_conf->arp_addr_cnt = c;
399 /* Configure driver only if associated */
400 if (ifmgd->associated) {
401 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
402 ieee80211_bss_info_change_notify(sdata,
403 BSS_CHANGED_ARP_FILTER);
406 mutex_unlock(&ifmgd->mtx);
412 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
414 struct ieee80211_local *local =
415 container_of(napi, struct ieee80211_local, napi);
417 return local->ops->napi_poll(&local->hw, budget);
420 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
422 struct ieee80211_local *local = hw_to_local(hw);
424 napi_schedule(&local->napi);
426 EXPORT_SYMBOL(ieee80211_napi_schedule);
428 void ieee80211_napi_complete(struct ieee80211_hw *hw)
430 struct ieee80211_local *local = hw_to_local(hw);
432 napi_complete(&local->napi);
434 EXPORT_SYMBOL(ieee80211_napi_complete);
436 /* There isn't a lot of sense in it, but you can transmit anything you like */
437 static const struct ieee80211_txrx_stypes
438 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
439 [NL80211_IFTYPE_ADHOC] = {
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
443 [NL80211_IFTYPE_STATION] = {
445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
448 [NL80211_IFTYPE_AP] = {
450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
453 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
454 BIT(IEEE80211_STYPE_AUTH >> 4) |
455 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
456 BIT(IEEE80211_STYPE_ACTION >> 4),
458 [NL80211_IFTYPE_AP_VLAN] = {
461 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
462 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
463 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
464 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
465 BIT(IEEE80211_STYPE_AUTH >> 4) |
466 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
467 BIT(IEEE80211_STYPE_ACTION >> 4),
469 [NL80211_IFTYPE_P2P_CLIENT] = {
471 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
474 [NL80211_IFTYPE_P2P_GO] = {
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),
486 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
487 const struct ieee80211_ops *ops)
489 struct ieee80211_local *local;
493 /* Ensure 32-byte alignment of our private data and hw private data.
494 * We use the wiphy priv data for both our ieee80211_local and for
495 * the driver's private data
497 * In memory it'll be like this:
499 * +-------------------------+
501 * +-------------------------+
502 * | struct ieee80211_local |
503 * +-------------------------+
504 * | driver's private data |
505 * +-------------------------+
508 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
510 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
515 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
517 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
518 WIPHY_FLAG_4ADDR_AP |
519 WIPHY_FLAG_4ADDR_STATION;
520 wiphy->privid = mac80211_wiphy_privid;
522 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
524 local = wiphy_priv(wiphy);
526 local->hw.wiphy = wiphy;
528 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
533 BUG_ON(!ops->config);
534 BUG_ON(!ops->add_interface);
535 BUG_ON(!ops->remove_interface);
536 BUG_ON(!ops->configure_filter);
539 /* set up some defaults */
540 local->hw.queues = 1;
541 local->hw.max_rates = 1;
542 local->hw.max_report_rates = 0;
543 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
544 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
545 local->user_power_level = -1;
546 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
547 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
549 INIT_LIST_HEAD(&local->interfaces);
551 __hw_addr_init(&local->mc_list);
553 mutex_init(&local->iflist_mtx);
554 mutex_init(&local->mtx);
556 mutex_init(&local->key_mtx);
557 spin_lock_init(&local->filter_lock);
558 spin_lock_init(&local->queue_stop_reason_lock);
560 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
562 ieee80211_work_init(local);
564 INIT_WORK(&local->restart_work, ieee80211_restart_work);
566 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
567 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
568 local->smps_mode = IEEE80211_SMPS_OFF;
570 INIT_WORK(&local->dynamic_ps_enable_work,
571 ieee80211_dynamic_ps_enable_work);
572 INIT_WORK(&local->dynamic_ps_disable_work,
573 ieee80211_dynamic_ps_disable_work);
574 setup_timer(&local->dynamic_ps_timer,
575 ieee80211_dynamic_ps_timer, (unsigned long) local);
577 sta_info_init(local);
579 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
580 skb_queue_head_init(&local->pending[i]);
581 atomic_set(&local->agg_queue_stop[i], 0);
583 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
584 (unsigned long)local);
586 tasklet_init(&local->tasklet,
587 ieee80211_tasklet_handler,
588 (unsigned long) local);
590 skb_queue_head_init(&local->skb_queue);
591 skb_queue_head_init(&local->skb_queue_unreliable);
593 /* init dummy netdev for use w/ NAPI */
594 init_dummy_netdev(&local->napi_dev);
596 return local_to_hw(local);
598 EXPORT_SYMBOL(ieee80211_alloc_hw);
600 int ieee80211_register_hw(struct ieee80211_hw *hw)
602 struct ieee80211_local *local = hw_to_local(hw);
604 enum ieee80211_band band;
605 int channels, max_bitrates;
607 static const u32 cipher_suites[] = {
608 /* keep WEP first, it may be removed below */
609 WLAN_CIPHER_SUITE_WEP40,
610 WLAN_CIPHER_SUITE_WEP104,
611 WLAN_CIPHER_SUITE_TKIP,
612 WLAN_CIPHER_SUITE_CCMP,
614 /* keep last -- depends on hw flags! */
615 WLAN_CIPHER_SUITE_AES_CMAC
618 if (hw->max_report_rates == 0)
619 hw->max_report_rates = hw->max_rates;
622 * generic code guarantees at least one band,
623 * set this very early because much code assumes
624 * that hw.conf.channel is assigned
629 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
630 struct ieee80211_supported_band *sband;
632 sband = local->hw.wiphy->bands[band];
635 if (!local->oper_channel) {
636 /* init channel we're on */
637 local->hw.conf.channel =
638 local->oper_channel = &sband->channels[0];
639 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
641 channels += sband->n_channels;
643 if (max_bitrates < sband->n_bitrates)
644 max_bitrates = sband->n_bitrates;
645 supp_ht = supp_ht || sband->ht_cap.ht_supported;
648 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
649 sizeof(void *) * channels, GFP_KERNEL);
650 if (!local->int_scan_req)
653 /* if low-level driver supports AP, we also support VLAN */
654 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
655 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
657 /* mac80211 always supports monitor */
658 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
660 #ifndef CONFIG_MAC80211_MESH
661 /* mesh depends on Kconfig, but drivers should set it if they want */
662 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
665 /* mac80211 supports control port protocol changing */
666 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
668 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
669 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
670 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
671 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
673 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
674 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
675 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
678 * Calculate scan IE length -- we need this to alloc
679 * memory and to subtract from the driver limit. It
680 * includes the (extended) supported rates and HT
681 * information -- SSID is the driver's responsibility.
683 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
685 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
687 if (!local->ops->hw_scan) {
688 /* For hw_scan, driver needs to set these up. */
689 local->hw.wiphy->max_scan_ssids = 4;
690 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
694 * If the driver supports any scan IEs, then assume the
695 * limit includes the IEs mac80211 will add, otherwise
696 * leave it at zero and let the driver sort it out; we
697 * still pass our IEs to the driver but userspace will
698 * not be allowed to in that case.
700 if (local->hw.wiphy->max_scan_ie_len)
701 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
703 /* Set up cipher suites unless driver already did */
704 if (!local->hw.wiphy->cipher_suites) {
705 local->hw.wiphy->cipher_suites = cipher_suites;
706 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
707 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
708 local->hw.wiphy->n_cipher_suites--;
710 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
711 if (local->hw.wiphy->cipher_suites == cipher_suites) {
712 local->hw.wiphy->cipher_suites += 2;
713 local->hw.wiphy->n_cipher_suites -= 2;
721 local->hw.wiphy->cipher_suites,
722 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
726 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
727 u32 suite = local->hw.wiphy->cipher_suites[r];
728 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
729 suite == WLAN_CIPHER_SUITE_WEP104)
733 local->hw.wiphy->cipher_suites = suites;
734 local->hw.wiphy->n_cipher_suites = w;
735 local->wiphy_ciphers_allocated = true;
739 result = wiphy_register(local->hw.wiphy);
741 goto fail_wiphy_register;
744 * We use the number of queues for feature tests (QoS, HT) internally
745 * so restrict them appropriately.
747 if (hw->queues > IEEE80211_MAX_QUEUES)
748 hw->queues = IEEE80211_MAX_QUEUES;
751 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
752 if (!local->workqueue) {
758 * The hardware needs headroom for sending the frame,
759 * and we need some headroom for passing the frame to monitor
760 * interfaces, but never both at the same time.
762 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
763 sizeof(struct ieee80211_tx_status_rtap_hdr));
764 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
765 sizeof(struct ieee80211_tx_status_rtap_hdr));
767 debugfs_hw_add(local);
770 * if the driver doesn't specify a max listen interval we
771 * use 5 which should be a safe default
773 if (local->hw.max_listen_interval == 0)
774 local->hw.max_listen_interval = 5;
776 local->hw.conf.listen_interval = local->hw.max_listen_interval;
778 local->dynamic_ps_forced_timeout = -1;
780 result = sta_info_start(local);
784 result = ieee80211_wep_init(local);
786 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
791 result = ieee80211_init_rate_ctrl_alg(local,
792 hw->rate_control_algorithm);
794 wiphy_debug(local->hw.wiphy,
795 "Failed to initialize rate control algorithm\n");
799 /* add one default STA interface if supported */
800 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
801 result = ieee80211_if_add(local, "wlan%d", NULL,
802 NL80211_IFTYPE_STATION, NULL);
804 wiphy_warn(local->hw.wiphy,
805 "Failed to add default virtual iface\n");
810 ieee80211_led_init(local);
812 local->network_latency_notifier.notifier_call =
813 ieee80211_max_network_latency;
814 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
815 &local->network_latency_notifier);
822 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
823 result = register_inetaddr_notifier(&local->ifa_notifier);
828 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
829 local->hw.napi_weight);
835 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
836 &local->network_latency_notifier);
840 ieee80211_led_exit(local);
841 ieee80211_remove_interfaces(local);
844 ieee80211_wep_free(local);
845 sta_info_stop(local);
847 destroy_workqueue(local->workqueue);
849 wiphy_unregister(local->hw.wiphy);
851 if (local->wiphy_ciphers_allocated)
852 kfree(local->hw.wiphy->cipher_suites);
853 kfree(local->int_scan_req);
856 EXPORT_SYMBOL(ieee80211_register_hw);
858 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
860 struct ieee80211_local *local = hw_to_local(hw);
862 tasklet_kill(&local->tx_pending_tasklet);
863 tasklet_kill(&local->tasklet);
865 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
866 &local->network_latency_notifier);
868 unregister_inetaddr_notifier(&local->ifa_notifier);
874 * At this point, interface list manipulations are fine
875 * because the driver cannot be handing us frames any
876 * more and the tasklet is killed.
878 ieee80211_remove_interfaces(local);
883 * Now all work items will be gone, but the
884 * timer might still be armed, so delete it
886 del_timer_sync(&local->work_timer);
888 cancel_work_sync(&local->restart_work);
889 cancel_work_sync(&local->reconfig_filter);
891 ieee80211_clear_tx_pending(local);
892 sta_info_stop(local);
893 rate_control_deinitialize(local);
895 if (skb_queue_len(&local->skb_queue) ||
896 skb_queue_len(&local->skb_queue_unreliable))
897 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
898 skb_queue_purge(&local->skb_queue);
899 skb_queue_purge(&local->skb_queue_unreliable);
901 destroy_workqueue(local->workqueue);
902 wiphy_unregister(local->hw.wiphy);
903 ieee80211_wep_free(local);
904 ieee80211_led_exit(local);
905 kfree(local->int_scan_req);
907 EXPORT_SYMBOL(ieee80211_unregister_hw);
909 void ieee80211_free_hw(struct ieee80211_hw *hw)
911 struct ieee80211_local *local = hw_to_local(hw);
913 mutex_destroy(&local->iflist_mtx);
914 mutex_destroy(&local->mtx);
916 if (local->wiphy_ciphers_allocated)
917 kfree(local->hw.wiphy->cipher_suites);
919 wiphy_free(local->hw.wiphy);
921 EXPORT_SYMBOL(ieee80211_free_hw);
923 static int __init ieee80211_init(void)
928 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
929 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
930 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
932 ret = rc80211_minstrel_init();
936 ret = rc80211_minstrel_ht_init();
940 ret = rc80211_pid_init();
944 ret = ieee80211_iface_init();
952 rc80211_minstrel_ht_exit();
954 rc80211_minstrel_exit();
959 static void __exit ieee80211_exit(void)
962 rc80211_minstrel_ht_exit();
963 rc80211_minstrel_exit();
966 * For key todo, it'll be empty by now but the work
967 * might still be scheduled.
969 flush_scheduled_work();
974 ieee80211_iface_exit();
978 subsys_initcall(ieee80211_init);
979 module_exit(ieee80211_exit);
981 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
982 MODULE_LICENSE("GPL");