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 (sdata->vif.type == NL80211_IFTYPE_WDS)
205 sdata->vif.bss_conf.bssid = NULL;
206 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
207 sdata->vif.bss_conf.bssid = zero;
213 switch (sdata->vif.type) {
214 case NL80211_IFTYPE_AP:
215 case NL80211_IFTYPE_ADHOC:
216 case NL80211_IFTYPE_WDS:
217 case NL80211_IFTYPE_MESH_POINT:
220 /* do not warn to simplify caller in scan.c */
221 changed &= ~BSS_CHANGED_BEACON_ENABLED;
222 if (WARN_ON(changed & BSS_CHANGED_BEACON))
227 if (changed & BSS_CHANGED_BEACON_ENABLED) {
228 if (local->quiescing || !ieee80211_sdata_running(sdata) ||
229 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
230 sdata->vif.bss_conf.enable_beacon = false;
233 * Beacon should be enabled, but AP mode must
234 * check whether there is a beacon configured.
236 switch (sdata->vif.type) {
237 case NL80211_IFTYPE_AP:
238 sdata->vif.bss_conf.enable_beacon =
239 !!sdata->u.ap.beacon;
241 case NL80211_IFTYPE_ADHOC:
242 sdata->vif.bss_conf.enable_beacon =
243 !!sdata->u.ibss.presp;
245 case NL80211_IFTYPE_MESH_POINT:
246 sdata->vif.bss_conf.enable_beacon = true;
256 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
259 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
261 sdata->vif.bss_conf.use_cts_prot = false;
262 sdata->vif.bss_conf.use_short_preamble = false;
263 sdata->vif.bss_conf.use_short_slot = false;
264 return BSS_CHANGED_ERP_CTS_PROT |
265 BSS_CHANGED_ERP_PREAMBLE |
266 BSS_CHANGED_ERP_SLOT;
269 static void ieee80211_tasklet_handler(unsigned long data)
271 struct ieee80211_local *local = (struct ieee80211_local *) data;
274 while ((skb = skb_dequeue(&local->skb_queue)) ||
275 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
276 switch (skb->pkt_type) {
277 case IEEE80211_RX_MSG:
278 /* Clear skb->pkt_type in order to not confuse kernel
281 ieee80211_rx(local_to_hw(local), skb);
283 case IEEE80211_TX_STATUS_MSG:
285 ieee80211_tx_status(local_to_hw(local), skb);
288 WARN(1, "mac80211: Packet is of unknown type %d\n",
296 static void ieee80211_restart_work(struct work_struct *work)
298 struct ieee80211_local *local =
299 container_of(work, struct ieee80211_local, restart_work);
301 /* wait for scan work complete */
302 flush_workqueue(local->workqueue);
304 mutex_lock(&local->mtx);
305 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
306 "%s called with hardware scan in progress\n", __func__);
307 mutex_unlock(&local->mtx);
310 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)))
311 ieee80211_scan_cancel(local);
312 ieee80211_reconfig(local);
316 void ieee80211_restart_hw(struct ieee80211_hw *hw)
318 struct ieee80211_local *local = hw_to_local(hw);
320 trace_api_restart_hw(local);
322 /* use this reason, ieee80211_reconfig will unblock it */
323 ieee80211_stop_queues_by_reason(hw,
324 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
326 schedule_work(&local->restart_work);
328 EXPORT_SYMBOL(ieee80211_restart_hw);
330 static void ieee80211_recalc_smps_work(struct work_struct *work)
332 struct ieee80211_local *local =
333 container_of(work, struct ieee80211_local, recalc_smps);
335 mutex_lock(&local->iflist_mtx);
336 ieee80211_recalc_smps(local, NULL);
337 mutex_unlock(&local->iflist_mtx);
341 static int ieee80211_ifa_changed(struct notifier_block *nb,
342 unsigned long data, void *arg)
344 struct in_ifaddr *ifa = arg;
345 struct ieee80211_local *local =
346 container_of(nb, struct ieee80211_local,
348 struct net_device *ndev = ifa->ifa_dev->dev;
349 struct wireless_dev *wdev = ndev->ieee80211_ptr;
350 struct in_device *idev;
351 struct ieee80211_sub_if_data *sdata;
352 struct ieee80211_bss_conf *bss_conf;
353 struct ieee80211_if_managed *ifmgd;
356 /* Make sure it's our interface that got changed */
360 if (wdev->wiphy != local->hw.wiphy)
363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
364 bss_conf = &sdata->vif.bss_conf;
366 if (!ieee80211_sdata_running(sdata))
369 /* ARP filtering is only supported in managed mode */
370 if (sdata->vif.type != NL80211_IFTYPE_STATION)
373 idev = sdata->dev->ip_ptr;
377 ifmgd = &sdata->u.mgd;
378 mutex_lock(&ifmgd->mtx);
380 /* Copy the addresses to the bss_conf list */
381 ifa = idev->ifa_list;
382 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
383 bss_conf->arp_addr_list[c] = ifa->ifa_address;
388 /* If not all addresses fit the list, disable filtering */
390 sdata->arp_filter_state = false;
393 sdata->arp_filter_state = true;
395 bss_conf->arp_addr_cnt = c;
397 /* Configure driver only if associated */
398 if (ifmgd->associated) {
399 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
400 ieee80211_bss_info_change_notify(sdata,
401 BSS_CHANGED_ARP_FILTER);
404 mutex_unlock(&ifmgd->mtx);
410 static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
412 struct ieee80211_local *local =
413 container_of(napi, struct ieee80211_local, napi);
415 return local->ops->napi_poll(&local->hw, budget);
418 void ieee80211_napi_schedule(struct ieee80211_hw *hw)
420 struct ieee80211_local *local = hw_to_local(hw);
422 napi_schedule(&local->napi);
424 EXPORT_SYMBOL(ieee80211_napi_schedule);
426 void ieee80211_napi_complete(struct ieee80211_hw *hw)
428 struct ieee80211_local *local = hw_to_local(hw);
430 napi_complete(&local->napi);
432 EXPORT_SYMBOL(ieee80211_napi_complete);
434 /* There isn't a lot of sense in it, but you can transmit anything you like */
435 static const struct ieee80211_txrx_stypes
436 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
437 [NL80211_IFTYPE_ADHOC] = {
439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4),
441 [NL80211_IFTYPE_STATION] = {
443 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
444 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
446 [NL80211_IFTYPE_AP] = {
448 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
449 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
450 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
451 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
452 BIT(IEEE80211_STYPE_AUTH >> 4) |
453 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
454 BIT(IEEE80211_STYPE_ACTION >> 4),
456 [NL80211_IFTYPE_AP_VLAN] = {
459 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
460 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
462 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
463 BIT(IEEE80211_STYPE_AUTH >> 4) |
464 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
465 BIT(IEEE80211_STYPE_ACTION >> 4),
467 [NL80211_IFTYPE_P2P_CLIENT] = {
469 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
470 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
472 [NL80211_IFTYPE_P2P_GO] = {
474 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
475 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
476 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
477 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
478 BIT(IEEE80211_STYPE_AUTH >> 4) |
479 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
480 BIT(IEEE80211_STYPE_ACTION >> 4),
484 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
485 const struct ieee80211_ops *ops)
487 struct ieee80211_local *local;
491 /* Ensure 32-byte alignment of our private data and hw private data.
492 * We use the wiphy priv data for both our ieee80211_local and for
493 * the driver's private data
495 * In memory it'll be like this:
497 * +-------------------------+
499 * +-------------------------+
500 * | struct ieee80211_local |
501 * +-------------------------+
502 * | driver's private data |
503 * +-------------------------+
506 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
508 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
513 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
515 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
516 WIPHY_FLAG_4ADDR_AP |
517 WIPHY_FLAG_4ADDR_STATION;
518 wiphy->privid = mac80211_wiphy_privid;
520 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
522 local = wiphy_priv(wiphy);
524 local->hw.wiphy = wiphy;
526 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
531 BUG_ON(!ops->config);
532 BUG_ON(!ops->add_interface);
533 BUG_ON(!ops->remove_interface);
534 BUG_ON(!ops->configure_filter);
537 /* set up some defaults */
538 local->hw.queues = 1;
539 local->hw.max_rates = 1;
540 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
541 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
542 local->user_power_level = -1;
543 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
544 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
546 INIT_LIST_HEAD(&local->interfaces);
548 __hw_addr_init(&local->mc_list);
550 mutex_init(&local->iflist_mtx);
551 mutex_init(&local->mtx);
553 mutex_init(&local->key_mtx);
554 spin_lock_init(&local->filter_lock);
555 spin_lock_init(&local->queue_stop_reason_lock);
557 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
559 ieee80211_work_init(local);
561 INIT_WORK(&local->restart_work, ieee80211_restart_work);
563 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
564 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
565 local->smps_mode = IEEE80211_SMPS_OFF;
567 INIT_WORK(&local->dynamic_ps_enable_work,
568 ieee80211_dynamic_ps_enable_work);
569 INIT_WORK(&local->dynamic_ps_disable_work,
570 ieee80211_dynamic_ps_disable_work);
571 setup_timer(&local->dynamic_ps_timer,
572 ieee80211_dynamic_ps_timer, (unsigned long) local);
574 sta_info_init(local);
576 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
577 skb_queue_head_init(&local->pending[i]);
578 atomic_set(&local->agg_queue_stop[i], 0);
580 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
581 (unsigned long)local);
583 tasklet_init(&local->tasklet,
584 ieee80211_tasklet_handler,
585 (unsigned long) local);
587 skb_queue_head_init(&local->skb_queue);
588 skb_queue_head_init(&local->skb_queue_unreliable);
590 /* init dummy netdev for use w/ NAPI */
591 init_dummy_netdev(&local->napi_dev);
593 return local_to_hw(local);
595 EXPORT_SYMBOL(ieee80211_alloc_hw);
597 int ieee80211_register_hw(struct ieee80211_hw *hw)
599 struct ieee80211_local *local = hw_to_local(hw);
601 enum ieee80211_band band;
602 int channels, max_bitrates;
604 static const u32 cipher_suites[] = {
605 /* keep WEP first, it may be removed below */
606 WLAN_CIPHER_SUITE_WEP40,
607 WLAN_CIPHER_SUITE_WEP104,
608 WLAN_CIPHER_SUITE_TKIP,
609 WLAN_CIPHER_SUITE_CCMP,
611 /* keep last -- depends on hw flags! */
612 WLAN_CIPHER_SUITE_AES_CMAC
616 * generic code guarantees at least one band,
617 * set this very early because much code assumes
618 * that hw.conf.channel is assigned
623 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
624 struct ieee80211_supported_band *sband;
626 sband = local->hw.wiphy->bands[band];
629 if (!local->oper_channel) {
630 /* init channel we're on */
631 local->hw.conf.channel =
632 local->oper_channel = &sband->channels[0];
633 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
635 channels += sband->n_channels;
637 if (max_bitrates < sband->n_bitrates)
638 max_bitrates = sband->n_bitrates;
639 supp_ht = supp_ht || sband->ht_cap.ht_supported;
642 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
643 sizeof(void *) * channels, GFP_KERNEL);
644 if (!local->int_scan_req)
647 /* if low-level driver supports AP, we also support VLAN */
648 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
649 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
651 /* mac80211 always supports monitor */
652 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
654 #ifndef CONFIG_MAC80211_MESH
655 /* mesh depends on Kconfig, but drivers should set it if they want */
656 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
659 /* mac80211 supports control port protocol changing */
660 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
662 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
663 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
664 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
665 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
667 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
668 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
669 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
672 * Calculate scan IE length -- we need this to alloc
673 * memory and to subtract from the driver limit. It
674 * includes the (extended) supported rates and HT
675 * information -- SSID is the driver's responsibility.
677 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
679 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
681 if (!local->ops->hw_scan) {
682 /* For hw_scan, driver needs to set these up. */
683 local->hw.wiphy->max_scan_ssids = 4;
684 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
688 * If the driver supports any scan IEs, then assume the
689 * limit includes the IEs mac80211 will add, otherwise
690 * leave it at zero and let the driver sort it out; we
691 * still pass our IEs to the driver but userspace will
692 * not be allowed to in that case.
694 if (local->hw.wiphy->max_scan_ie_len)
695 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
697 /* Set up cipher suites unless driver already did */
698 if (!local->hw.wiphy->cipher_suites) {
699 local->hw.wiphy->cipher_suites = cipher_suites;
700 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
701 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
702 local->hw.wiphy->n_cipher_suites--;
704 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
705 if (local->hw.wiphy->cipher_suites == cipher_suites) {
706 local->hw.wiphy->cipher_suites += 2;
707 local->hw.wiphy->n_cipher_suites -= 2;
715 local->hw.wiphy->cipher_suites,
716 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
720 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
721 u32 suite = local->hw.wiphy->cipher_suites[r];
722 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
723 suite == WLAN_CIPHER_SUITE_WEP104)
727 local->hw.wiphy->cipher_suites = suites;
728 local->hw.wiphy->n_cipher_suites = w;
729 local->wiphy_ciphers_allocated = true;
733 result = wiphy_register(local->hw.wiphy);
735 goto fail_wiphy_register;
738 * We use the number of queues for feature tests (QoS, HT) internally
739 * so restrict them appropriately.
741 if (hw->queues > IEEE80211_MAX_QUEUES)
742 hw->queues = IEEE80211_MAX_QUEUES;
745 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
746 if (!local->workqueue) {
752 * The hardware needs headroom for sending the frame,
753 * and we need some headroom for passing the frame to monitor
754 * interfaces, but never both at the same time.
756 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
757 sizeof(struct ieee80211_tx_status_rtap_hdr));
758 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
759 sizeof(struct ieee80211_tx_status_rtap_hdr));
761 debugfs_hw_add(local);
764 * if the driver doesn't specify a max listen interval we
765 * use 5 which should be a safe default
767 if (local->hw.max_listen_interval == 0)
768 local->hw.max_listen_interval = 5;
770 local->hw.conf.listen_interval = local->hw.max_listen_interval;
772 local->dynamic_ps_forced_timeout = -1;
774 result = sta_info_start(local);
778 result = ieee80211_wep_init(local);
780 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
785 result = ieee80211_init_rate_ctrl_alg(local,
786 hw->rate_control_algorithm);
788 wiphy_debug(local->hw.wiphy,
789 "Failed to initialize rate control algorithm\n");
793 /* add one default STA interface if supported */
794 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
795 result = ieee80211_if_add(local, "wlan%d", NULL,
796 NL80211_IFTYPE_STATION, NULL);
798 wiphy_warn(local->hw.wiphy,
799 "Failed to add default virtual iface\n");
804 ieee80211_led_init(local);
806 local->network_latency_notifier.notifier_call =
807 ieee80211_max_network_latency;
808 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
809 &local->network_latency_notifier);
816 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
817 result = register_inetaddr_notifier(&local->ifa_notifier);
822 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
823 local->hw.napi_weight);
829 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
830 &local->network_latency_notifier);
834 ieee80211_led_exit(local);
835 ieee80211_remove_interfaces(local);
838 ieee80211_wep_free(local);
839 sta_info_stop(local);
841 destroy_workqueue(local->workqueue);
843 wiphy_unregister(local->hw.wiphy);
845 if (local->wiphy_ciphers_allocated)
846 kfree(local->hw.wiphy->cipher_suites);
847 kfree(local->int_scan_req);
850 EXPORT_SYMBOL(ieee80211_register_hw);
852 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
854 struct ieee80211_local *local = hw_to_local(hw);
856 tasklet_kill(&local->tx_pending_tasklet);
857 tasklet_kill(&local->tasklet);
859 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
860 &local->network_latency_notifier);
862 unregister_inetaddr_notifier(&local->ifa_notifier);
868 * At this point, interface list manipulations are fine
869 * because the driver cannot be handing us frames any
870 * more and the tasklet is killed.
872 ieee80211_remove_interfaces(local);
877 * Now all work items will be gone, but the
878 * timer might still be armed, so delete it
880 del_timer_sync(&local->work_timer);
882 cancel_work_sync(&local->restart_work);
883 cancel_work_sync(&local->reconfig_filter);
885 ieee80211_clear_tx_pending(local);
886 sta_info_stop(local);
887 rate_control_deinitialize(local);
889 if (skb_queue_len(&local->skb_queue) ||
890 skb_queue_len(&local->skb_queue_unreliable))
891 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
892 skb_queue_purge(&local->skb_queue);
893 skb_queue_purge(&local->skb_queue_unreliable);
895 destroy_workqueue(local->workqueue);
896 wiphy_unregister(local->hw.wiphy);
897 ieee80211_wep_free(local);
898 ieee80211_led_exit(local);
899 kfree(local->int_scan_req);
901 EXPORT_SYMBOL(ieee80211_unregister_hw);
903 void ieee80211_free_hw(struct ieee80211_hw *hw)
905 struct ieee80211_local *local = hw_to_local(hw);
907 mutex_destroy(&local->iflist_mtx);
908 mutex_destroy(&local->mtx);
910 if (local->wiphy_ciphers_allocated)
911 kfree(local->hw.wiphy->cipher_suites);
913 wiphy_free(local->hw.wiphy);
915 EXPORT_SYMBOL(ieee80211_free_hw);
917 static int __init ieee80211_init(void)
922 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
923 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
924 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
926 ret = rc80211_minstrel_init();
930 ret = rc80211_minstrel_ht_init();
934 ret = rc80211_pid_init();
938 ret = ieee80211_iface_init();
946 rc80211_minstrel_ht_exit();
948 rc80211_minstrel_exit();
953 static void __exit ieee80211_exit(void)
956 rc80211_minstrel_ht_exit();
957 rc80211_minstrel_exit();
960 * For key todo, it'll be empty by now but the work
961 * might still be scheduled.
963 flush_scheduled_work();
968 ieee80211_iface_exit();
972 subsys_initcall(ieee80211_init);
973 module_exit(ieee80211_exit);
975 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
976 MODULE_LICENSE("GPL");