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 chan
= scan_chan
= local
->tmp_channel
;
115 channel_type
= local
->tmp_channel_type
;
116 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
118 chan
= local
->oper_channel
;
119 channel_type
= local
->_oper_channel_type
;
120 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
122 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
124 if (offchannel_flag
|| chan
!= local
->hw
.conf
.channel
||
125 channel_type
!= local
->hw
.conf
.channel_type
) {
126 local
->hw
.conf
.channel
= chan
;
127 local
->hw
.conf
.channel_type
= channel_type
;
128 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
131 if (!conf_is_ht(&local
->hw
.conf
)) {
133 * mac80211.h documents that this is only valid
134 * when the channel is set to an HT type, and
135 * that otherwise STATIC is used.
137 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
138 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
139 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
140 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
144 power
= chan
->max_power
;
146 power
= local
->power_constr_level
?
147 (chan
->max_power
- local
->power_constr_level
) :
150 if (local
->user_power_level
>= 0)
151 power
= min(power
, local
->user_power_level
);
153 if (local
->hw
.conf
.power_level
!= power
) {
154 changed
|= IEEE80211_CONF_CHANGE_POWER
;
155 local
->hw
.conf
.power_level
= power
;
158 if (changed
&& local
->open_count
) {
159 ret
= drv_config(local
, changed
);
162 * HW reconfiguration should never fail, the driver has told
163 * us what it can support so it should live up to that promise.
166 * rfkill is not integrated with mac80211 and a
167 * configuration command can thus fail if hardware rfkill
170 * FIXME: integrate rfkill with mac80211 and then add this
180 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
183 struct ieee80211_local
*local
= sdata
->local
;
184 static const u8 zero
[ETH_ALEN
] = { 0 };
189 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
191 * While not associated, claim a BSSID of all-zeroes
192 * so that drivers don't do any weird things with the
193 * BSSID at that time.
195 if (sdata
->vif
.bss_conf
.assoc
)
196 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
198 sdata
->vif
.bss_conf
.bssid
= zero
;
199 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
200 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
201 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
202 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
203 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
204 sdata
->vif
.bss_conf
.bssid
= zero
;
210 switch (sdata
->vif
.type
) {
211 case NL80211_IFTYPE_AP
:
212 case NL80211_IFTYPE_ADHOC
:
213 case NL80211_IFTYPE_MESH_POINT
:
216 /* do not warn to simplify caller in scan.c */
217 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
218 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
223 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
224 if (local
->quiescing
|| !ieee80211_sdata_running(sdata
) ||
225 test_bit(SCAN_SW_SCANNING
, &local
->scanning
)) {
226 sdata
->vif
.bss_conf
.enable_beacon
= false;
229 * Beacon should be enabled, but AP mode must
230 * check whether there is a beacon configured.
232 switch (sdata
->vif
.type
) {
233 case NL80211_IFTYPE_AP
:
234 sdata
->vif
.bss_conf
.enable_beacon
=
235 !!sdata
->u
.ap
.beacon
;
237 case NL80211_IFTYPE_ADHOC
:
238 sdata
->vif
.bss_conf
.enable_beacon
=
239 !!sdata
->u
.ibss
.presp
;
241 case NL80211_IFTYPE_MESH_POINT
:
242 sdata
->vif
.bss_conf
.enable_beacon
= true;
252 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
255 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
257 sdata
->vif
.bss_conf
.use_cts_prot
= false;
258 sdata
->vif
.bss_conf
.use_short_preamble
= false;
259 sdata
->vif
.bss_conf
.use_short_slot
= false;
260 return BSS_CHANGED_ERP_CTS_PROT
|
261 BSS_CHANGED_ERP_PREAMBLE
|
262 BSS_CHANGED_ERP_SLOT
;
265 static void ieee80211_tasklet_handler(unsigned long data
)
267 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
270 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
271 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
272 switch (skb
->pkt_type
) {
273 case IEEE80211_RX_MSG
:
274 /* Clear skb->pkt_type in order to not confuse kernel
277 ieee80211_rx(local_to_hw(local
), skb
);
279 case IEEE80211_TX_STATUS_MSG
:
281 ieee80211_tx_status(local_to_hw(local
), skb
);
284 WARN(1, "mac80211: Packet is of unknown type %d\n",
292 static void ieee80211_restart_work(struct work_struct
*work
)
294 struct ieee80211_local
*local
=
295 container_of(work
, struct ieee80211_local
, restart_work
);
298 ieee80211_reconfig(local
);
302 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
304 struct ieee80211_local
*local
= hw_to_local(hw
);
306 trace_api_restart_hw(local
);
308 /* wait for scan work complete */
309 flush_workqueue(local
->workqueue
);
311 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
),
312 "%s called with hardware scan in progress\n", __func__
);
314 if (unlikely(test_bit(SCAN_SW_SCANNING
, &local
->scanning
)))
315 ieee80211_scan_cancel(local
);
317 /* use this reason, ieee80211_reconfig will unblock it */
318 ieee80211_stop_queues_by_reason(hw
,
319 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
321 schedule_work(&local
->restart_work
);
323 EXPORT_SYMBOL(ieee80211_restart_hw
);
325 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
327 struct ieee80211_local
*local
=
328 container_of(work
, struct ieee80211_local
, recalc_smps
);
330 mutex_lock(&local
->iflist_mtx
);
331 ieee80211_recalc_smps(local
, NULL
);
332 mutex_unlock(&local
->iflist_mtx
);
336 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
337 unsigned long data
, void *arg
)
339 struct in_ifaddr
*ifa
= arg
;
340 struct ieee80211_local
*local
=
341 container_of(nb
, struct ieee80211_local
,
343 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
344 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
345 struct in_device
*idev
;
346 struct ieee80211_sub_if_data
*sdata
;
347 struct ieee80211_bss_conf
*bss_conf
;
348 struct ieee80211_if_managed
*ifmgd
;
351 /* Make sure it's our interface that got changed */
355 if (wdev
->wiphy
!= local
->hw
.wiphy
)
358 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
359 bss_conf
= &sdata
->vif
.bss_conf
;
361 if (!ieee80211_sdata_running(sdata
))
364 /* ARP filtering is only supported in managed mode */
365 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
368 idev
= sdata
->dev
->ip_ptr
;
372 ifmgd
= &sdata
->u
.mgd
;
373 mutex_lock(&ifmgd
->mtx
);
375 /* Copy the addresses to the bss_conf list */
376 ifa
= idev
->ifa_list
;
377 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
378 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
383 /* If not all addresses fit the list, disable filtering */
385 sdata
->arp_filter_state
= false;
388 sdata
->arp_filter_state
= true;
390 bss_conf
->arp_addr_cnt
= c
;
392 /* Configure driver only if associated */
393 if (ifmgd
->associated
) {
394 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
395 ieee80211_bss_info_change_notify(sdata
,
396 BSS_CHANGED_ARP_FILTER
);
399 mutex_unlock(&ifmgd
->mtx
);
405 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
407 struct ieee80211_local
*local
=
408 container_of(napi
, struct ieee80211_local
, napi
);
410 return local
->ops
->napi_poll(&local
->hw
, budget
);
413 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
415 struct ieee80211_local
*local
= hw_to_local(hw
);
417 napi_schedule(&local
->napi
);
419 EXPORT_SYMBOL(ieee80211_napi_schedule
);
421 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
423 struct ieee80211_local
*local
= hw_to_local(hw
);
425 napi_complete(&local
->napi
);
427 EXPORT_SYMBOL(ieee80211_napi_complete
);
429 /* There isn't a lot of sense in it, but you can transmit anything you like */
430 static const struct ieee80211_txrx_stypes
431 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
432 [NL80211_IFTYPE_ADHOC
] = {
434 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4),
436 [NL80211_IFTYPE_STATION
] = {
438 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
441 [NL80211_IFTYPE_AP
] = {
443 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
444 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
445 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
446 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
447 BIT(IEEE80211_STYPE_AUTH
>> 4) |
448 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
449 BIT(IEEE80211_STYPE_ACTION
>> 4),
451 [NL80211_IFTYPE_AP_VLAN
] = {
454 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
455 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
456 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
457 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
458 BIT(IEEE80211_STYPE_AUTH
>> 4) |
459 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
460 BIT(IEEE80211_STYPE_ACTION
>> 4),
462 [NL80211_IFTYPE_P2P_CLIENT
] = {
464 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
465 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
467 [NL80211_IFTYPE_P2P_GO
] = {
469 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
470 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
471 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
472 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
473 BIT(IEEE80211_STYPE_AUTH
>> 4) |
474 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
475 BIT(IEEE80211_STYPE_ACTION
>> 4),
479 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
480 const struct ieee80211_ops
*ops
)
482 struct ieee80211_local
*local
;
486 /* Ensure 32-byte alignment of our private data and hw private data.
487 * We use the wiphy priv data for both our ieee80211_local and for
488 * the driver's private data
490 * In memory it'll be like this:
492 * +-------------------------+
494 * +-------------------------+
495 * | struct ieee80211_local |
496 * +-------------------------+
497 * | driver's private data |
498 * +-------------------------+
501 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
503 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
508 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
510 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
511 WIPHY_FLAG_4ADDR_AP
|
512 WIPHY_FLAG_4ADDR_STATION
;
513 wiphy
->privid
= mac80211_wiphy_privid
;
515 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
517 local
= wiphy_priv(wiphy
);
519 local
->hw
.wiphy
= wiphy
;
521 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
526 BUG_ON(!ops
->config
);
527 BUG_ON(!ops
->add_interface
);
528 BUG_ON(!ops
->remove_interface
);
529 BUG_ON(!ops
->configure_filter
);
532 /* set up some defaults */
533 local
->hw
.queues
= 1;
534 local
->hw
.max_rates
= 1;
535 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
536 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
537 local
->user_power_level
= -1;
538 local
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
539 local
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
541 INIT_LIST_HEAD(&local
->interfaces
);
543 __hw_addr_init(&local
->mc_list
);
545 mutex_init(&local
->iflist_mtx
);
546 mutex_init(&local
->mtx
);
548 mutex_init(&local
->key_mtx
);
549 spin_lock_init(&local
->filter_lock
);
550 spin_lock_init(&local
->queue_stop_reason_lock
);
552 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
554 ieee80211_work_init(local
);
556 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
558 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
559 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
560 local
->smps_mode
= IEEE80211_SMPS_OFF
;
562 INIT_WORK(&local
->dynamic_ps_enable_work
,
563 ieee80211_dynamic_ps_enable_work
);
564 INIT_WORK(&local
->dynamic_ps_disable_work
,
565 ieee80211_dynamic_ps_disable_work
);
566 setup_timer(&local
->dynamic_ps_timer
,
567 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
569 sta_info_init(local
);
571 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
572 skb_queue_head_init(&local
->pending
[i
]);
573 atomic_set(&local
->agg_queue_stop
[i
], 0);
575 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
576 (unsigned long)local
);
578 tasklet_init(&local
->tasklet
,
579 ieee80211_tasklet_handler
,
580 (unsigned long) local
);
582 skb_queue_head_init(&local
->skb_queue
);
583 skb_queue_head_init(&local
->skb_queue_unreliable
);
585 /* init dummy netdev for use w/ NAPI */
586 init_dummy_netdev(&local
->napi_dev
);
588 return local_to_hw(local
);
590 EXPORT_SYMBOL(ieee80211_alloc_hw
);
592 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
594 struct ieee80211_local
*local
= hw_to_local(hw
);
596 enum ieee80211_band band
;
597 int channels
, max_bitrates
;
599 static const u32 cipher_suites
[] = {
600 /* keep WEP first, it may be removed below */
601 WLAN_CIPHER_SUITE_WEP40
,
602 WLAN_CIPHER_SUITE_WEP104
,
603 WLAN_CIPHER_SUITE_TKIP
,
604 WLAN_CIPHER_SUITE_CCMP
,
606 /* keep last -- depends on hw flags! */
607 WLAN_CIPHER_SUITE_AES_CMAC
611 * generic code guarantees at least one band,
612 * set this very early because much code assumes
613 * that hw.conf.channel is assigned
618 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
619 struct ieee80211_supported_band
*sband
;
621 sband
= local
->hw
.wiphy
->bands
[band
];
624 if (!local
->oper_channel
) {
625 /* init channel we're on */
626 local
->hw
.conf
.channel
=
627 local
->oper_channel
= &sband
->channels
[0];
628 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
630 channels
+= sband
->n_channels
;
632 if (max_bitrates
< sband
->n_bitrates
)
633 max_bitrates
= sband
->n_bitrates
;
634 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
637 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
638 sizeof(void *) * channels
, GFP_KERNEL
);
639 if (!local
->int_scan_req
)
642 /* if low-level driver supports AP, we also support VLAN */
643 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
644 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
646 /* mac80211 always supports monitor */
647 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
649 #ifndef CONFIG_MAC80211_MESH
650 /* mesh depends on Kconfig, but drivers should set it if they want */
651 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
654 /* mac80211 supports control port protocol changing */
655 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
657 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
658 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
659 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
660 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
662 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
663 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
664 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
667 * Calculate scan IE length -- we need this to alloc
668 * memory and to subtract from the driver limit. It
669 * includes the (extended) supported rates and HT
670 * information -- SSID is the driver's responsibility.
672 local
->scan_ies_len
= 4 + max_bitrates
; /* (ext) supp rates */
674 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
676 if (!local
->ops
->hw_scan
) {
677 /* For hw_scan, driver needs to set these up. */
678 local
->hw
.wiphy
->max_scan_ssids
= 4;
679 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
683 * If the driver supports any scan IEs, then assume the
684 * limit includes the IEs mac80211 will add, otherwise
685 * leave it at zero and let the driver sort it out; we
686 * still pass our IEs to the driver but userspace will
687 * not be allowed to in that case.
689 if (local
->hw
.wiphy
->max_scan_ie_len
)
690 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
692 /* Set up cipher suites unless driver already did */
693 if (!local
->hw
.wiphy
->cipher_suites
) {
694 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
695 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
696 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
697 local
->hw
.wiphy
->n_cipher_suites
--;
699 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
700 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
701 local
->hw
.wiphy
->cipher_suites
+= 2;
702 local
->hw
.wiphy
->n_cipher_suites
-= 2;
710 local
->hw
.wiphy
->cipher_suites
,
711 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
715 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
716 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
717 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
718 suite
== WLAN_CIPHER_SUITE_WEP104
)
722 local
->hw
.wiphy
->cipher_suites
= suites
;
723 local
->hw
.wiphy
->n_cipher_suites
= w
;
724 local
->wiphy_ciphers_allocated
= true;
728 result
= wiphy_register(local
->hw
.wiphy
);
730 goto fail_wiphy_register
;
733 * We use the number of queues for feature tests (QoS, HT) internally
734 * so restrict them appropriately.
736 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
737 hw
->queues
= IEEE80211_MAX_QUEUES
;
740 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
741 if (!local
->workqueue
) {
747 * The hardware needs headroom for sending the frame,
748 * and we need some headroom for passing the frame to monitor
749 * interfaces, but never both at the same time.
751 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM
!=
752 sizeof(struct ieee80211_tx_status_rtap_hdr
));
753 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
754 sizeof(struct ieee80211_tx_status_rtap_hdr
));
756 debugfs_hw_add(local
);
759 * if the driver doesn't specify a max listen interval we
760 * use 5 which should be a safe default
762 if (local
->hw
.max_listen_interval
== 0)
763 local
->hw
.max_listen_interval
= 5;
765 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
767 local
->dynamic_ps_forced_timeout
= -1;
769 result
= sta_info_start(local
);
773 result
= ieee80211_wep_init(local
);
775 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
780 result
= ieee80211_init_rate_ctrl_alg(local
,
781 hw
->rate_control_algorithm
);
783 wiphy_debug(local
->hw
.wiphy
,
784 "Failed to initialize rate control algorithm\n");
788 /* add one default STA interface if supported */
789 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
790 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
791 NL80211_IFTYPE_STATION
, NULL
);
793 wiphy_warn(local
->hw
.wiphy
,
794 "Failed to add default virtual iface\n");
799 ieee80211_led_init(local
);
801 local
->network_latency_notifier
.notifier_call
=
802 ieee80211_max_network_latency
;
803 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
804 &local
->network_latency_notifier
);
811 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
812 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
817 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
818 local
->hw
.napi_weight
);
824 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
825 &local
->network_latency_notifier
);
829 ieee80211_led_exit(local
);
830 ieee80211_remove_interfaces(local
);
833 ieee80211_wep_free(local
);
834 sta_info_stop(local
);
836 destroy_workqueue(local
->workqueue
);
838 wiphy_unregister(local
->hw
.wiphy
);
840 if (local
->wiphy_ciphers_allocated
)
841 kfree(local
->hw
.wiphy
->cipher_suites
);
842 kfree(local
->int_scan_req
);
845 EXPORT_SYMBOL(ieee80211_register_hw
);
847 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
849 struct ieee80211_local
*local
= hw_to_local(hw
);
851 tasklet_kill(&local
->tx_pending_tasklet
);
852 tasklet_kill(&local
->tasklet
);
854 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
855 &local
->network_latency_notifier
);
857 unregister_inetaddr_notifier(&local
->ifa_notifier
);
863 * At this point, interface list manipulations are fine
864 * because the driver cannot be handing us frames any
865 * more and the tasklet is killed.
867 ieee80211_remove_interfaces(local
);
871 cancel_work_sync(&local
->restart_work
);
872 cancel_work_sync(&local
->reconfig_filter
);
874 ieee80211_clear_tx_pending(local
);
875 sta_info_stop(local
);
876 rate_control_deinitialize(local
);
878 if (skb_queue_len(&local
->skb_queue
) ||
879 skb_queue_len(&local
->skb_queue_unreliable
))
880 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
881 skb_queue_purge(&local
->skb_queue
);
882 skb_queue_purge(&local
->skb_queue_unreliable
);
884 destroy_workqueue(local
->workqueue
);
885 wiphy_unregister(local
->hw
.wiphy
);
886 ieee80211_wep_free(local
);
887 ieee80211_led_exit(local
);
888 kfree(local
->int_scan_req
);
890 EXPORT_SYMBOL(ieee80211_unregister_hw
);
892 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
894 struct ieee80211_local
*local
= hw_to_local(hw
);
896 mutex_destroy(&local
->iflist_mtx
);
897 mutex_destroy(&local
->mtx
);
899 if (local
->wiphy_ciphers_allocated
)
900 kfree(local
->hw
.wiphy
->cipher_suites
);
902 wiphy_free(local
->hw
.wiphy
);
904 EXPORT_SYMBOL(ieee80211_free_hw
);
906 static int __init
ieee80211_init(void)
911 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
912 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
913 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
915 ret
= rc80211_minstrel_init();
919 ret
= rc80211_minstrel_ht_init();
923 ret
= rc80211_pid_init();
927 ret
= ieee80211_iface_init();
935 rc80211_minstrel_ht_exit();
937 rc80211_minstrel_exit();
942 static void __exit
ieee80211_exit(void)
945 rc80211_minstrel_ht_exit();
946 rc80211_minstrel_exit();
949 * For key todo, it'll be empty by now but the work
950 * might still be scheduled.
952 flush_scheduled_work();
957 ieee80211_iface_exit();
961 subsys_initcall(ieee80211_init
);
962 module_exit(ieee80211_exit
);
964 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
965 MODULE_LICENSE("GPL");