2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
36 static struct lock_class_key ieee80211_rx_skb_queue_class
;
38 void ieee80211_configure_filter(struct ieee80211_local
*local
)
41 unsigned int changed_flags
;
42 unsigned int new_flags
= 0;
44 if (atomic_read(&local
->iff_promiscs
))
45 new_flags
|= FIF_PROMISC_IN_BSS
;
47 if (atomic_read(&local
->iff_allmultis
))
48 new_flags
|= FIF_ALLMULTI
;
50 if (local
->monitors
|| local
->scanning
)
51 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
53 if (local
->fif_probe_req
|| local
->probe_req_reg
)
54 new_flags
|= FIF_PROBE_REQ
;
56 if (local
->fif_fcsfail
)
57 new_flags
|= FIF_FCSFAIL
;
59 if (local
->fif_plcpfail
)
60 new_flags
|= FIF_PLCPFAIL
;
62 if (local
->fif_control
)
63 new_flags
|= FIF_CONTROL
;
65 if (local
->fif_other_bss
)
66 new_flags
|= FIF_OTHER_BSS
;
68 if (local
->fif_pspoll
)
69 new_flags
|= FIF_PSPOLL
;
71 spin_lock_bh(&local
->filter_lock
);
72 changed_flags
= local
->filter_flags
^ new_flags
;
74 mc
= drv_prepare_multicast(local
, &local
->mc_list
);
75 spin_unlock_bh(&local
->filter_lock
);
80 drv_configure_filter(local
, changed_flags
, &new_flags
, mc
);
82 WARN_ON(new_flags
& (1<<31));
84 local
->filter_flags
= new_flags
& ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct
*work
)
89 struct ieee80211_local
*local
=
90 container_of(work
, struct ieee80211_local
, reconfig_filter
);
92 ieee80211_configure_filter(local
);
95 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
97 struct ieee80211_channel
*chan
, *scan_chan
;
100 enum nl80211_channel_type channel_type
;
105 scan_chan
= local
->scan_channel
;
107 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
110 /* If scanning on oper channel, use whatever channel-type
111 * is currently in use.
113 if (chan
== local
->oper_channel
)
114 channel_type
= local
->_oper_channel_type
;
116 channel_type
= NL80211_CHAN_NO_HT
;
117 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
118 } else if (local
->tmp_channel
&&
119 local
->oper_channel
!= local
->tmp_channel
) {
120 chan
= scan_chan
= local
->tmp_channel
;
121 channel_type
= local
->tmp_channel_type
;
122 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
124 chan
= local
->oper_channel
;
125 channel_type
= local
->_oper_channel_type
;
126 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
129 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
131 if (offchannel_flag
|| chan
!= local
->hw
.conf
.channel
||
132 channel_type
!= local
->hw
.conf
.channel_type
) {
133 local
->hw
.conf
.channel
= chan
;
134 local
->hw
.conf
.channel_type
= channel_type
;
135 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
138 if (!conf_is_ht(&local
->hw
.conf
)) {
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
144 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
145 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
146 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
147 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
150 if ((local
->scanning
& SCAN_SW_SCANNING
) ||
151 (local
->scanning
& SCAN_HW_SCANNING
))
152 power
= chan
->max_power
;
154 power
= local
->power_constr_level
?
155 (chan
->max_power
- local
->power_constr_level
) :
158 if (local
->user_power_level
>= 0)
159 power
= min(power
, local
->user_power_level
);
161 if (local
->hw
.conf
.power_level
!= power
) {
162 changed
|= IEEE80211_CONF_CHANGE_POWER
;
163 local
->hw
.conf
.power_level
= power
;
166 if (changed
&& local
->open_count
) {
167 ret
= drv_config(local
, changed
);
170 * HW reconfiguration should never fail, the driver has told
171 * us what it can support so it should live up to that promise.
174 * rfkill is not integrated with mac80211 and a
175 * configuration command can thus fail if hardware rfkill
178 * FIXME: integrate rfkill with mac80211 and then add this
188 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
191 struct ieee80211_local
*local
= sdata
->local
;
192 static const u8 zero
[ETH_ALEN
] = { 0 };
197 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
199 * While not associated, claim a BSSID of all-zeroes
200 * so that drivers don't do any weird things with the
201 * BSSID at that time.
203 if (sdata
->vif
.bss_conf
.assoc
)
204 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
206 sdata
->vif
.bss_conf
.bssid
= zero
;
207 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
208 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
209 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
210 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
211 else if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
212 sdata
->vif
.bss_conf
.bssid
= NULL
;
213 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
214 sdata
->vif
.bss_conf
.bssid
= zero
;
220 switch (sdata
->vif
.type
) {
221 case NL80211_IFTYPE_AP
:
222 case NL80211_IFTYPE_ADHOC
:
223 case NL80211_IFTYPE_WDS
:
224 case NL80211_IFTYPE_MESH_POINT
:
227 /* do not warn to simplify caller in scan.c */
228 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
229 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
234 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
235 if (local
->quiescing
|| !ieee80211_sdata_running(sdata
) ||
236 test_bit(SCAN_SW_SCANNING
, &local
->scanning
)) {
237 sdata
->vif
.bss_conf
.enable_beacon
= false;
240 * Beacon should be enabled, but AP mode must
241 * check whether there is a beacon configured.
243 switch (sdata
->vif
.type
) {
244 case NL80211_IFTYPE_AP
:
245 sdata
->vif
.bss_conf
.enable_beacon
=
246 !!sdata
->u
.ap
.beacon
;
248 case NL80211_IFTYPE_ADHOC
:
249 sdata
->vif
.bss_conf
.enable_beacon
=
250 !!sdata
->u
.ibss
.presp
;
252 #ifdef CONFIG_MAC80211_MESH
253 case NL80211_IFTYPE_MESH_POINT
:
254 sdata
->vif
.bss_conf
.enable_beacon
=
255 !!sdata
->u
.mesh
.mesh_id_len
;
266 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
269 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
271 sdata
->vif
.bss_conf
.use_cts_prot
= false;
272 sdata
->vif
.bss_conf
.use_short_preamble
= false;
273 sdata
->vif
.bss_conf
.use_short_slot
= false;
274 return BSS_CHANGED_ERP_CTS_PROT
|
275 BSS_CHANGED_ERP_PREAMBLE
|
276 BSS_CHANGED_ERP_SLOT
;
279 static void ieee80211_tasklet_handler(unsigned long data
)
281 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
282 struct sta_info
*sta
, *tmp
;
283 struct skb_eosp_msg_data
*eosp_data
;
286 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
287 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
288 switch (skb
->pkt_type
) {
289 case IEEE80211_RX_MSG
:
290 /* Clear skb->pkt_type in order to not confuse kernel
293 ieee80211_rx(local_to_hw(local
), skb
);
295 case IEEE80211_TX_STATUS_MSG
:
297 ieee80211_tx_status(local_to_hw(local
), skb
);
299 case IEEE80211_EOSP_MSG
:
300 eosp_data
= (void *)skb
->cb
;
301 for_each_sta_info(local
, eosp_data
->sta
, sta
, tmp
) {
302 /* skip wrong virtual interface */
303 if (memcmp(eosp_data
->iface
,
304 sta
->sdata
->vif
.addr
, ETH_ALEN
))
306 clear_sta_flag(sta
, WLAN_STA_SP
);
312 WARN(1, "mac80211: Packet is of unknown type %d\n",
320 static void ieee80211_restart_work(struct work_struct
*work
)
322 struct ieee80211_local
*local
=
323 container_of(work
, struct ieee80211_local
, restart_work
);
325 /* wait for scan work complete */
326 flush_workqueue(local
->workqueue
);
328 mutex_lock(&local
->mtx
);
329 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
330 local
->sched_scanning
,
331 "%s called with hardware scan in progress\n", __func__
);
332 mutex_unlock(&local
->mtx
);
335 ieee80211_scan_cancel(local
);
336 ieee80211_reconfig(local
);
340 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
342 struct ieee80211_local
*local
= hw_to_local(hw
);
344 trace_api_restart_hw(local
);
346 wiphy_info(hw
->wiphy
,
347 "Hardware restart was requested\n");
349 /* use this reason, ieee80211_reconfig will unblock it */
350 ieee80211_stop_queues_by_reason(hw
,
351 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
353 schedule_work(&local
->restart_work
);
355 EXPORT_SYMBOL(ieee80211_restart_hw
);
357 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
359 struct ieee80211_local
*local
=
360 container_of(work
, struct ieee80211_local
, recalc_smps
);
362 mutex_lock(&local
->iflist_mtx
);
363 ieee80211_recalc_smps(local
);
364 mutex_unlock(&local
->iflist_mtx
);
368 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
369 unsigned long data
, void *arg
)
371 struct in_ifaddr
*ifa
= arg
;
372 struct ieee80211_local
*local
=
373 container_of(nb
, struct ieee80211_local
,
375 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
376 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
377 struct in_device
*idev
;
378 struct ieee80211_sub_if_data
*sdata
;
379 struct ieee80211_bss_conf
*bss_conf
;
380 struct ieee80211_if_managed
*ifmgd
;
383 /* Make sure it's our interface that got changed */
387 if (wdev
->wiphy
!= local
->hw
.wiphy
)
390 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
391 bss_conf
= &sdata
->vif
.bss_conf
;
393 if (!ieee80211_sdata_running(sdata
))
396 /* ARP filtering is only supported in managed mode */
397 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
400 idev
= __in_dev_get_rtnl(sdata
->dev
);
404 ifmgd
= &sdata
->u
.mgd
;
405 mutex_lock(&ifmgd
->mtx
);
407 /* Copy the addresses to the bss_conf list */
408 ifa
= idev
->ifa_list
;
409 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
410 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
415 /* If not all addresses fit the list, disable filtering */
417 sdata
->arp_filter_state
= false;
420 sdata
->arp_filter_state
= true;
422 bss_conf
->arp_addr_cnt
= c
;
424 /* Configure driver only if associated */
425 if (ifmgd
->associated
) {
426 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
427 ieee80211_bss_info_change_notify(sdata
,
428 BSS_CHANGED_ARP_FILTER
);
431 mutex_unlock(&ifmgd
->mtx
);
437 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
439 struct ieee80211_local
*local
=
440 container_of(napi
, struct ieee80211_local
, napi
);
442 return local
->ops
->napi_poll(&local
->hw
, budget
);
445 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
447 struct ieee80211_local
*local
= hw_to_local(hw
);
449 napi_schedule(&local
->napi
);
451 EXPORT_SYMBOL(ieee80211_napi_schedule
);
453 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
455 struct ieee80211_local
*local
= hw_to_local(hw
);
457 napi_complete(&local
->napi
);
459 EXPORT_SYMBOL(ieee80211_napi_complete
);
461 /* There isn't a lot of sense in it, but you can transmit anything you like */
462 static const struct ieee80211_txrx_stypes
463 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
464 [NL80211_IFTYPE_ADHOC
] = {
466 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4),
468 [NL80211_IFTYPE_STATION
] = {
470 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
471 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
473 [NL80211_IFTYPE_AP
] = {
475 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
476 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
477 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
478 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
479 BIT(IEEE80211_STYPE_AUTH
>> 4) |
480 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
481 BIT(IEEE80211_STYPE_ACTION
>> 4),
483 [NL80211_IFTYPE_AP_VLAN
] = {
486 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
487 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
488 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
489 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
490 BIT(IEEE80211_STYPE_AUTH
>> 4) |
491 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
492 BIT(IEEE80211_STYPE_ACTION
>> 4),
494 [NL80211_IFTYPE_P2P_CLIENT
] = {
496 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
497 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
499 [NL80211_IFTYPE_P2P_GO
] = {
501 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
502 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
503 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
504 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
505 BIT(IEEE80211_STYPE_AUTH
>> 4) |
506 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
507 BIT(IEEE80211_STYPE_ACTION
>> 4),
509 [NL80211_IFTYPE_MESH_POINT
] = {
511 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
512 BIT(IEEE80211_STYPE_AUTH
>> 4) |
513 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
517 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
518 const struct ieee80211_ops
*ops
)
520 struct ieee80211_local
*local
;
524 /* Ensure 32-byte alignment of our private data and hw private data.
525 * We use the wiphy priv data for both our ieee80211_local and for
526 * the driver's private data
528 * In memory it'll be like this:
530 * +-------------------------+
532 * +-------------------------+
533 * | struct ieee80211_local |
534 * +-------------------------+
535 * | driver's private data |
536 * +-------------------------+
539 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
541 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
546 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
548 wiphy
->privid
= mac80211_wiphy_privid
;
550 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
551 WIPHY_FLAG_4ADDR_AP
|
552 WIPHY_FLAG_4ADDR_STATION
;
555 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
557 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
559 local
= wiphy_priv(wiphy
);
561 local
->hw
.wiphy
= wiphy
;
563 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
568 BUG_ON(!ops
->config
);
569 BUG_ON(!ops
->add_interface
);
570 BUG_ON(!ops
->remove_interface
);
571 BUG_ON(!ops
->configure_filter
);
574 /* set up some defaults */
575 local
->hw
.queues
= 1;
576 local
->hw
.max_rates
= 1;
577 local
->hw
.max_report_rates
= 0;
578 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
579 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
580 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
581 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
582 local
->user_power_level
= -1;
583 local
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
584 local
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
586 INIT_LIST_HEAD(&local
->interfaces
);
588 __hw_addr_init(&local
->mc_list
);
590 mutex_init(&local
->iflist_mtx
);
591 mutex_init(&local
->mtx
);
593 mutex_init(&local
->key_mtx
);
594 spin_lock_init(&local
->filter_lock
);
595 spin_lock_init(&local
->queue_stop_reason_lock
);
598 * The rx_skb_queue is only accessed from tasklets,
599 * but other SKB queues are used from within IRQ
600 * context. Therefore, this one needs a different
601 * locking class so our direct, non-irq-safe use of
602 * the queue's lock doesn't throw lockdep warnings.
604 skb_queue_head_init_class(&local
->rx_skb_queue
,
605 &ieee80211_rx_skb_queue_class
);
607 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
609 ieee80211_work_init(local
);
611 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
613 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
614 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
615 local
->smps_mode
= IEEE80211_SMPS_OFF
;
617 INIT_WORK(&local
->dynamic_ps_enable_work
,
618 ieee80211_dynamic_ps_enable_work
);
619 INIT_WORK(&local
->dynamic_ps_disable_work
,
620 ieee80211_dynamic_ps_disable_work
);
621 setup_timer(&local
->dynamic_ps_timer
,
622 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
624 INIT_WORK(&local
->sched_scan_stopped_work
,
625 ieee80211_sched_scan_stopped_work
);
627 sta_info_init(local
);
629 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
630 skb_queue_head_init(&local
->pending
[i
]);
631 atomic_set(&local
->agg_queue_stop
[i
], 0);
633 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
634 (unsigned long)local
);
636 tasklet_init(&local
->tasklet
,
637 ieee80211_tasklet_handler
,
638 (unsigned long) local
);
640 skb_queue_head_init(&local
->skb_queue
);
641 skb_queue_head_init(&local
->skb_queue_unreliable
);
643 /* init dummy netdev for use w/ NAPI */
644 init_dummy_netdev(&local
->napi_dev
);
646 ieee80211_led_names(local
);
648 ieee80211_hw_roc_setup(local
);
650 return local_to_hw(local
);
652 EXPORT_SYMBOL(ieee80211_alloc_hw
);
654 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
656 struct ieee80211_local
*local
= hw_to_local(hw
);
658 enum ieee80211_band band
;
659 int channels
, max_bitrates
;
661 static const u32 cipher_suites
[] = {
662 /* keep WEP first, it may be removed below */
663 WLAN_CIPHER_SUITE_WEP40
,
664 WLAN_CIPHER_SUITE_WEP104
,
665 WLAN_CIPHER_SUITE_TKIP
,
666 WLAN_CIPHER_SUITE_CCMP
,
668 /* keep last -- depends on hw flags! */
669 WLAN_CIPHER_SUITE_AES_CMAC
672 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
)
674 && (!local
->ops
->suspend
|| !local
->ops
->resume
)
679 if (hw
->max_report_rates
== 0)
680 hw
->max_report_rates
= hw
->max_rates
;
683 * generic code guarantees at least one band,
684 * set this very early because much code assumes
685 * that hw.conf.channel is assigned
690 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
691 struct ieee80211_supported_band
*sband
;
693 sband
= local
->hw
.wiphy
->bands
[band
];
696 if (!local
->oper_channel
) {
697 /* init channel we're on */
698 local
->hw
.conf
.channel
=
699 local
->oper_channel
= &sband
->channels
[0];
700 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
702 channels
+= sband
->n_channels
;
704 if (max_bitrates
< sband
->n_bitrates
)
705 max_bitrates
= sband
->n_bitrates
;
706 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
709 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
710 sizeof(void *) * channels
, GFP_KERNEL
);
711 if (!local
->int_scan_req
)
714 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
715 if (!local
->hw
.wiphy
->bands
[band
])
717 local
->int_scan_req
->rates
[band
] = (u32
) -1;
720 /* if low-level driver supports AP, we also support VLAN */
721 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
722 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
723 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
726 /* mac80211 always supports monitor */
727 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
728 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
731 * mac80211 doesn't support more than 1 channel, and also not more
732 * than one IBSS interface
734 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
735 const struct ieee80211_iface_combination
*c
;
738 c
= &hw
->wiphy
->iface_combinations
[i
];
740 if (c
->num_different_channels
> 1)
743 for (j
= 0; j
< c
->n_limits
; j
++)
744 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
745 c
->limits
[j
].max
> 1)
749 #ifndef CONFIG_MAC80211_MESH
750 /* mesh depends on Kconfig, but drivers should set it if they want */
751 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
754 /* if the underlying driver supports mesh, mac80211 will (at least)
755 * provide routing of mesh authentication frames to userspace */
756 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
757 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
759 /* mac80211 supports control port protocol changing */
760 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
762 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
763 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
764 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
765 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
767 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
768 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
769 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
772 * Calculate scan IE length -- we need this to alloc
773 * memory and to subtract from the driver limit. It
774 * includes the DS Params, (extended) supported rates, and HT
775 * information -- SSID is the driver's responsibility.
777 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
780 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
782 if (!local
->ops
->hw_scan
) {
783 /* For hw_scan, driver needs to set these up. */
784 local
->hw
.wiphy
->max_scan_ssids
= 4;
785 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
789 * If the driver supports any scan IEs, then assume the
790 * limit includes the IEs mac80211 will add, otherwise
791 * leave it at zero and let the driver sort it out; we
792 * still pass our IEs to the driver but userspace will
793 * not be allowed to in that case.
795 if (local
->hw
.wiphy
->max_scan_ie_len
)
796 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
798 /* Set up cipher suites unless driver already did */
799 if (!local
->hw
.wiphy
->cipher_suites
) {
800 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
801 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
802 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
803 local
->hw
.wiphy
->n_cipher_suites
--;
805 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
806 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
807 local
->hw
.wiphy
->cipher_suites
+= 2;
808 local
->hw
.wiphy
->n_cipher_suites
-= 2;
816 local
->hw
.wiphy
->cipher_suites
,
817 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
821 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
822 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
823 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
824 suite
== WLAN_CIPHER_SUITE_WEP104
)
828 local
->hw
.wiphy
->cipher_suites
= suites
;
829 local
->hw
.wiphy
->n_cipher_suites
= w
;
830 local
->wiphy_ciphers_allocated
= true;
834 if (!local
->ops
->remain_on_channel
)
835 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
837 if (local
->ops
->sched_scan_start
)
838 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
840 /* mac80211 based drivers don't support internal TDLS setup */
841 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
842 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
844 result
= wiphy_register(local
->hw
.wiphy
);
846 goto fail_wiphy_register
;
849 * We use the number of queues for feature tests (QoS, HT) internally
850 * so restrict them appropriately.
852 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
853 hw
->queues
= IEEE80211_MAX_QUEUES
;
856 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
857 if (!local
->workqueue
) {
863 * The hardware needs headroom for sending the frame,
864 * and we need some headroom for passing the frame to monitor
865 * interfaces, but never both at the same time.
867 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
868 IEEE80211_TX_STATUS_HEADROOM
);
870 debugfs_hw_add(local
);
873 * if the driver doesn't specify a max listen interval we
874 * use 5 which should be a safe default
876 if (local
->hw
.max_listen_interval
== 0)
877 local
->hw
.max_listen_interval
= 5;
879 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
881 local
->dynamic_ps_forced_timeout
= -1;
883 result
= ieee80211_wep_init(local
);
885 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
890 result
= ieee80211_init_rate_ctrl_alg(local
,
891 hw
->rate_control_algorithm
);
893 wiphy_debug(local
->hw
.wiphy
,
894 "Failed to initialize rate control algorithm\n");
898 /* add one default STA interface if supported */
899 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
900 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
901 NL80211_IFTYPE_STATION
, NULL
);
903 wiphy_warn(local
->hw
.wiphy
,
904 "Failed to add default virtual iface\n");
909 ieee80211_led_init(local
);
911 local
->network_latency_notifier
.notifier_call
=
912 ieee80211_max_network_latency
;
913 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
914 &local
->network_latency_notifier
);
921 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
922 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
927 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
928 local
->hw
.napi_weight
);
934 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
935 &local
->network_latency_notifier
);
939 ieee80211_led_exit(local
);
940 ieee80211_remove_interfaces(local
);
943 ieee80211_wep_free(local
);
944 sta_info_stop(local
);
945 destroy_workqueue(local
->workqueue
);
947 wiphy_unregister(local
->hw
.wiphy
);
949 if (local
->wiphy_ciphers_allocated
)
950 kfree(local
->hw
.wiphy
->cipher_suites
);
951 kfree(local
->int_scan_req
);
954 EXPORT_SYMBOL(ieee80211_register_hw
);
956 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
958 struct ieee80211_local
*local
= hw_to_local(hw
);
960 tasklet_kill(&local
->tx_pending_tasklet
);
961 tasklet_kill(&local
->tasklet
);
963 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
964 &local
->network_latency_notifier
);
966 unregister_inetaddr_notifier(&local
->ifa_notifier
);
972 * At this point, interface list manipulations are fine
973 * because the driver cannot be handing us frames any
974 * more and the tasklet is killed.
976 ieee80211_remove_interfaces(local
);
981 * Now all work items will be gone, but the
982 * timer might still be armed, so delete it
984 del_timer_sync(&local
->work_timer
);
986 cancel_work_sync(&local
->restart_work
);
987 cancel_work_sync(&local
->reconfig_filter
);
989 ieee80211_clear_tx_pending(local
);
990 rate_control_deinitialize(local
);
992 if (skb_queue_len(&local
->skb_queue
) ||
993 skb_queue_len(&local
->skb_queue_unreliable
))
994 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
995 skb_queue_purge(&local
->skb_queue
);
996 skb_queue_purge(&local
->skb_queue_unreliable
);
997 skb_queue_purge(&local
->rx_skb_queue
);
999 destroy_workqueue(local
->workqueue
);
1000 wiphy_unregister(local
->hw
.wiphy
);
1001 sta_info_stop(local
);
1002 ieee80211_wep_free(local
);
1003 ieee80211_led_exit(local
);
1004 kfree(local
->int_scan_req
);
1006 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1008 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1010 struct ieee80211_local
*local
= hw_to_local(hw
);
1012 mutex_destroy(&local
->iflist_mtx
);
1013 mutex_destroy(&local
->mtx
);
1015 if (local
->wiphy_ciphers_allocated
)
1016 kfree(local
->hw
.wiphy
->cipher_suites
);
1018 wiphy_free(local
->hw
.wiphy
);
1020 EXPORT_SYMBOL(ieee80211_free_hw
);
1022 static int __init
ieee80211_init(void)
1024 struct sk_buff
*skb
;
1027 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1028 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1029 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1031 ret
= rc80211_minstrel_init();
1035 ret
= rc80211_minstrel_ht_init();
1039 ret
= rc80211_pid_init();
1043 ret
= ieee80211_iface_init();
1051 rc80211_minstrel_ht_exit();
1053 rc80211_minstrel_exit();
1058 static void __exit
ieee80211_exit(void)
1061 rc80211_minstrel_ht_exit();
1062 rc80211_minstrel_exit();
1067 ieee80211_iface_exit();
1073 subsys_initcall(ieee80211_init
);
1074 module_exit(ieee80211_exit
);
1076 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1077 MODULE_LICENSE("GPL");