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"
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
);
96 * Returns true if we are logically configured to be on
97 * the operating channel AND the hardware-conf is currently
98 * configured on the operating channel. Compares channel-type
101 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local
*local
)
103 struct ieee80211_channel
*chan
, *scan_chan
;
104 enum nl80211_channel_type channel_type
;
106 /* This logic needs to match logic in ieee80211_hw_config */
107 if (local
->scan_channel
) {
108 chan
= local
->scan_channel
;
109 /* If scanning on oper channel, use whatever channel-type
110 * is currently in use.
112 if (chan
== local
->oper_channel
)
113 channel_type
= local
->_oper_channel_type
;
115 channel_type
= NL80211_CHAN_NO_HT
;
116 } else if (local
->tmp_channel
) {
117 chan
= scan_chan
= local
->tmp_channel
;
118 channel_type
= local
->tmp_channel_type
;
120 chan
= local
->oper_channel
;
121 channel_type
= local
->_oper_channel_type
;
124 if (chan
!= local
->oper_channel
||
125 channel_type
!= local
->_oper_channel_type
)
128 /* Check current hardware-config against oper_channel. */
129 if ((local
->oper_channel
!= local
->hw
.conf
.channel
) ||
130 (local
->_oper_channel_type
!= local
->hw
.conf
.channel_type
))
136 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
138 struct ieee80211_channel
*chan
, *scan_chan
;
141 enum nl80211_channel_type channel_type
;
146 scan_chan
= local
->scan_channel
;
148 /* If this off-channel logic ever changes, ieee80211_on_oper_channel
149 * may need to change as well.
151 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
154 /* If scanning on oper channel, use whatever channel-type
155 * is currently in use.
157 if (chan
== local
->oper_channel
)
158 channel_type
= local
->_oper_channel_type
;
160 channel_type
= NL80211_CHAN_NO_HT
;
161 } else if (local
->tmp_channel
) {
162 chan
= scan_chan
= local
->tmp_channel
;
163 channel_type
= local
->tmp_channel_type
;
165 chan
= local
->oper_channel
;
166 channel_type
= local
->_oper_channel_type
;
169 if (chan
!= local
->oper_channel
||
170 channel_type
!= local
->_oper_channel_type
)
171 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
173 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
175 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
177 if (offchannel_flag
|| chan
!= local
->hw
.conf
.channel
||
178 channel_type
!= local
->hw
.conf
.channel_type
) {
179 local
->hw
.conf
.channel
= chan
;
180 local
->hw
.conf
.channel_type
= channel_type
;
181 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
184 if (!conf_is_ht(&local
->hw
.conf
)) {
186 * mac80211.h documents that this is only valid
187 * when the channel is set to an HT type, and
188 * that otherwise STATIC is used.
190 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
191 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
192 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
193 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
196 if ((local
->scanning
& SCAN_SW_SCANNING
) ||
197 (local
->scanning
& SCAN_HW_SCANNING
))
198 power
= chan
->max_power
;
200 power
= local
->power_constr_level
?
201 (chan
->max_power
- local
->power_constr_level
) :
204 if (local
->user_power_level
>= 0)
205 power
= min(power
, local
->user_power_level
);
207 if (local
->hw
.conf
.power_level
!= power
) {
208 changed
|= IEEE80211_CONF_CHANGE_POWER
;
209 local
->hw
.conf
.power_level
= power
;
212 if (changed
&& local
->open_count
) {
213 ret
= drv_config(local
, changed
);
216 * HW reconfiguration should never fail, the driver has told
217 * us what it can support so it should live up to that promise.
220 * rfkill is not integrated with mac80211 and a
221 * configuration command can thus fail if hardware rfkill
224 * FIXME: integrate rfkill with mac80211 and then add this
234 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
237 struct ieee80211_local
*local
= sdata
->local
;
238 static const u8 zero
[ETH_ALEN
] = { 0 };
243 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
245 * While not associated, claim a BSSID of all-zeroes
246 * so that drivers don't do any weird things with the
247 * BSSID at that time.
249 if (sdata
->vif
.bss_conf
.assoc
)
250 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
252 sdata
->vif
.bss_conf
.bssid
= zero
;
253 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
254 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
255 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
256 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
257 else if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
258 sdata
->vif
.bss_conf
.bssid
= NULL
;
259 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
260 sdata
->vif
.bss_conf
.bssid
= zero
;
266 switch (sdata
->vif
.type
) {
267 case NL80211_IFTYPE_AP
:
268 case NL80211_IFTYPE_ADHOC
:
269 case NL80211_IFTYPE_WDS
:
270 case NL80211_IFTYPE_MESH_POINT
:
273 /* do not warn to simplify caller in scan.c */
274 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
275 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
280 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
281 if (local
->quiescing
|| !ieee80211_sdata_running(sdata
) ||
282 test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)) {
283 sdata
->vif
.bss_conf
.enable_beacon
= false;
286 * Beacon should be enabled, but AP mode must
287 * check whether there is a beacon configured.
289 switch (sdata
->vif
.type
) {
290 case NL80211_IFTYPE_AP
:
291 sdata
->vif
.bss_conf
.enable_beacon
=
292 !!sdata
->u
.ap
.beacon
;
294 case NL80211_IFTYPE_ADHOC
:
295 sdata
->vif
.bss_conf
.enable_beacon
=
296 !!sdata
->u
.ibss
.presp
;
298 #ifdef CONFIG_MAC80211_MESH
299 case NL80211_IFTYPE_MESH_POINT
:
300 sdata
->vif
.bss_conf
.enable_beacon
=
301 !!sdata
->u
.mesh
.mesh_id_len
;
312 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
315 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
317 sdata
->vif
.bss_conf
.use_cts_prot
= false;
318 sdata
->vif
.bss_conf
.use_short_preamble
= false;
319 sdata
->vif
.bss_conf
.use_short_slot
= false;
320 return BSS_CHANGED_ERP_CTS_PROT
|
321 BSS_CHANGED_ERP_PREAMBLE
|
322 BSS_CHANGED_ERP_SLOT
;
325 static void ieee80211_tasklet_handler(unsigned long data
)
327 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
330 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
331 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
332 switch (skb
->pkt_type
) {
333 case IEEE80211_RX_MSG
:
334 /* Clear skb->pkt_type in order to not confuse kernel
337 ieee80211_rx(local_to_hw(local
), skb
);
339 case IEEE80211_TX_STATUS_MSG
:
341 ieee80211_tx_status(local_to_hw(local
), skb
);
344 WARN(1, "mac80211: Packet is of unknown type %d\n",
352 static void ieee80211_restart_work(struct work_struct
*work
)
354 struct ieee80211_local
*local
=
355 container_of(work
, struct ieee80211_local
, restart_work
);
357 /* wait for scan work complete */
358 flush_workqueue(local
->workqueue
);
360 mutex_lock(&local
->mtx
);
361 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
362 local
->sched_scanning
,
363 "%s called with hardware scan in progress\n", __func__
);
364 mutex_unlock(&local
->mtx
);
367 ieee80211_scan_cancel(local
);
368 ieee80211_reconfig(local
);
372 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
374 struct ieee80211_local
*local
= hw_to_local(hw
);
376 trace_api_restart_hw(local
);
378 wiphy_info(hw
->wiphy
,
379 "Hardware restart was requested\n");
381 /* use this reason, ieee80211_reconfig will unblock it */
382 ieee80211_stop_queues_by_reason(hw
,
383 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
385 schedule_work(&local
->restart_work
);
387 EXPORT_SYMBOL(ieee80211_restart_hw
);
389 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
391 struct ieee80211_local
*local
=
392 container_of(work
, struct ieee80211_local
, recalc_smps
);
394 mutex_lock(&local
->iflist_mtx
);
395 ieee80211_recalc_smps(local
);
396 mutex_unlock(&local
->iflist_mtx
);
400 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
401 unsigned long data
, void *arg
)
403 struct in_ifaddr
*ifa
= arg
;
404 struct ieee80211_local
*local
=
405 container_of(nb
, struct ieee80211_local
,
407 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
408 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
409 struct in_device
*idev
;
410 struct ieee80211_sub_if_data
*sdata
;
411 struct ieee80211_bss_conf
*bss_conf
;
412 struct ieee80211_if_managed
*ifmgd
;
415 /* Make sure it's our interface that got changed */
419 if (wdev
->wiphy
!= local
->hw
.wiphy
)
422 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
423 bss_conf
= &sdata
->vif
.bss_conf
;
425 if (!ieee80211_sdata_running(sdata
))
428 /* ARP filtering is only supported in managed mode */
429 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
432 idev
= __in_dev_get_rtnl(sdata
->dev
);
436 ifmgd
= &sdata
->u
.mgd
;
437 mutex_lock(&ifmgd
->mtx
);
439 /* Copy the addresses to the bss_conf list */
440 ifa
= idev
->ifa_list
;
441 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
442 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
447 /* If not all addresses fit the list, disable filtering */
449 sdata
->arp_filter_state
= false;
452 sdata
->arp_filter_state
= true;
454 bss_conf
->arp_addr_cnt
= c
;
456 /* Configure driver only if associated */
457 if (ifmgd
->associated
) {
458 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
459 ieee80211_bss_info_change_notify(sdata
,
460 BSS_CHANGED_ARP_FILTER
);
463 mutex_unlock(&ifmgd
->mtx
);
469 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
471 struct ieee80211_local
*local
=
472 container_of(napi
, struct ieee80211_local
, napi
);
474 return local
->ops
->napi_poll(&local
->hw
, budget
);
477 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
479 struct ieee80211_local
*local
= hw_to_local(hw
);
481 napi_schedule(&local
->napi
);
483 EXPORT_SYMBOL(ieee80211_napi_schedule
);
485 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
487 struct ieee80211_local
*local
= hw_to_local(hw
);
489 napi_complete(&local
->napi
);
491 EXPORT_SYMBOL(ieee80211_napi_complete
);
493 /* There isn't a lot of sense in it, but you can transmit anything you like */
494 static const struct ieee80211_txrx_stypes
495 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
496 [NL80211_IFTYPE_ADHOC
] = {
498 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4),
500 [NL80211_IFTYPE_STATION
] = {
502 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
503 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
505 [NL80211_IFTYPE_AP
] = {
507 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
508 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
509 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
510 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
511 BIT(IEEE80211_STYPE_AUTH
>> 4) |
512 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
513 BIT(IEEE80211_STYPE_ACTION
>> 4),
515 [NL80211_IFTYPE_AP_VLAN
] = {
518 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
519 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
520 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
521 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
522 BIT(IEEE80211_STYPE_AUTH
>> 4) |
523 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
524 BIT(IEEE80211_STYPE_ACTION
>> 4),
526 [NL80211_IFTYPE_P2P_CLIENT
] = {
528 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
529 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
531 [NL80211_IFTYPE_P2P_GO
] = {
533 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
534 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
535 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
536 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
537 BIT(IEEE80211_STYPE_AUTH
>> 4) |
538 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
539 BIT(IEEE80211_STYPE_ACTION
>> 4),
541 [NL80211_IFTYPE_MESH_POINT
] = {
543 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
544 BIT(IEEE80211_STYPE_AUTH
>> 4) |
545 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
549 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
550 const struct ieee80211_ops
*ops
)
552 struct ieee80211_local
*local
;
556 /* Ensure 32-byte alignment of our private data and hw private data.
557 * We use the wiphy priv data for both our ieee80211_local and for
558 * the driver's private data
560 * In memory it'll be like this:
562 * +-------------------------+
564 * +-------------------------+
565 * | struct ieee80211_local |
566 * +-------------------------+
567 * | driver's private data |
568 * +-------------------------+
571 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
573 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
578 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
580 wiphy
->privid
= mac80211_wiphy_privid
;
582 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
583 WIPHY_FLAG_4ADDR_AP
|
584 WIPHY_FLAG_4ADDR_STATION
;
587 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
589 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
591 local
= wiphy_priv(wiphy
);
593 local
->hw
.wiphy
= wiphy
;
595 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
600 BUG_ON(!ops
->config
);
601 BUG_ON(!ops
->add_interface
);
602 BUG_ON(!ops
->remove_interface
);
603 BUG_ON(!ops
->configure_filter
);
606 /* set up some defaults */
607 local
->hw
.queues
= 1;
608 local
->hw
.max_rates
= 1;
609 local
->hw
.max_report_rates
= 0;
610 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
611 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
612 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
613 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
614 local
->user_power_level
= -1;
615 local
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
616 local
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
618 INIT_LIST_HEAD(&local
->interfaces
);
620 __hw_addr_init(&local
->mc_list
);
622 mutex_init(&local
->iflist_mtx
);
623 mutex_init(&local
->mtx
);
625 mutex_init(&local
->key_mtx
);
626 spin_lock_init(&local
->filter_lock
);
627 spin_lock_init(&local
->queue_stop_reason_lock
);
630 * The rx_skb_queue is only accessed from tasklets,
631 * but other SKB queues are used from within IRQ
632 * context. Therefore, this one needs a different
633 * locking class so our direct, non-irq-safe use of
634 * the queue's lock doesn't throw lockdep warnings.
636 skb_queue_head_init_class(&local
->rx_skb_queue
,
637 &ieee80211_rx_skb_queue_class
);
639 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
641 ieee80211_work_init(local
);
643 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
645 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
646 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
647 local
->smps_mode
= IEEE80211_SMPS_OFF
;
649 INIT_WORK(&local
->dynamic_ps_enable_work
,
650 ieee80211_dynamic_ps_enable_work
);
651 INIT_WORK(&local
->dynamic_ps_disable_work
,
652 ieee80211_dynamic_ps_disable_work
);
653 setup_timer(&local
->dynamic_ps_timer
,
654 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
656 INIT_WORK(&local
->sched_scan_stopped_work
,
657 ieee80211_sched_scan_stopped_work
);
659 sta_info_init(local
);
661 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
662 skb_queue_head_init(&local
->pending
[i
]);
663 atomic_set(&local
->agg_queue_stop
[i
], 0);
665 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
666 (unsigned long)local
);
668 tasklet_init(&local
->tasklet
,
669 ieee80211_tasklet_handler
,
670 (unsigned long) local
);
672 skb_queue_head_init(&local
->skb_queue
);
673 skb_queue_head_init(&local
->skb_queue_unreliable
);
675 /* init dummy netdev for use w/ NAPI */
676 init_dummy_netdev(&local
->napi_dev
);
678 ieee80211_led_names(local
);
680 ieee80211_hw_roc_setup(local
);
682 return local_to_hw(local
);
684 EXPORT_SYMBOL(ieee80211_alloc_hw
);
686 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
688 struct ieee80211_local
*local
= hw_to_local(hw
);
690 enum ieee80211_band band
;
691 int channels
, max_bitrates
;
693 static const u32 cipher_suites
[] = {
694 /* keep WEP first, it may be removed below */
695 WLAN_CIPHER_SUITE_WEP40
,
696 WLAN_CIPHER_SUITE_WEP104
,
697 WLAN_CIPHER_SUITE_TKIP
,
698 WLAN_CIPHER_SUITE_CCMP
,
700 /* keep last -- depends on hw flags! */
701 WLAN_CIPHER_SUITE_AES_CMAC
704 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
)
706 && (!local
->ops
->suspend
|| !local
->ops
->resume
)
711 if (hw
->max_report_rates
== 0)
712 hw
->max_report_rates
= hw
->max_rates
;
715 * generic code guarantees at least one band,
716 * set this very early because much code assumes
717 * that hw.conf.channel is assigned
722 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
723 struct ieee80211_supported_band
*sband
;
725 sband
= local
->hw
.wiphy
->bands
[band
];
728 if (!local
->oper_channel
) {
729 /* init channel we're on */
730 local
->hw
.conf
.channel
=
731 local
->oper_channel
= &sband
->channels
[0];
732 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
734 channels
+= sband
->n_channels
;
736 if (max_bitrates
< sband
->n_bitrates
)
737 max_bitrates
= sband
->n_bitrates
;
738 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
741 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
742 sizeof(void *) * channels
, GFP_KERNEL
);
743 if (!local
->int_scan_req
)
746 /* if low-level driver supports AP, we also support VLAN */
747 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
748 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
749 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
752 /* mac80211 always supports monitor */
753 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
754 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
757 * mac80211 doesn't support more than 1 channel, and also not more
758 * than one IBSS interface
760 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
761 const struct ieee80211_iface_combination
*c
;
764 c
= &hw
->wiphy
->iface_combinations
[i
];
766 if (c
->num_different_channels
> 1)
769 for (j
= 0; j
< c
->n_limits
; j
++)
770 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
771 c
->limits
[j
].max
> 1)
775 #ifndef CONFIG_MAC80211_MESH
776 /* mesh depends on Kconfig, but drivers should set it if they want */
777 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
780 /* if the underlying driver supports mesh, mac80211 will (at least)
781 * provide routing of mesh authentication frames to userspace */
782 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
783 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
785 /* mac80211 supports control port protocol changing */
786 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
788 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
789 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
790 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
791 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
793 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
794 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
795 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
798 * Calculate scan IE length -- we need this to alloc
799 * memory and to subtract from the driver limit. It
800 * includes the DS Params, (extended) supported rates, and HT
801 * information -- SSID is the driver's responsibility.
803 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
806 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
808 if (!local
->ops
->hw_scan
) {
809 /* For hw_scan, driver needs to set these up. */
810 local
->hw
.wiphy
->max_scan_ssids
= 4;
811 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
815 * If the driver supports any scan IEs, then assume the
816 * limit includes the IEs mac80211 will add, otherwise
817 * leave it at zero and let the driver sort it out; we
818 * still pass our IEs to the driver but userspace will
819 * not be allowed to in that case.
821 if (local
->hw
.wiphy
->max_scan_ie_len
)
822 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
824 /* Set up cipher suites unless driver already did */
825 if (!local
->hw
.wiphy
->cipher_suites
) {
826 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
827 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
828 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
829 local
->hw
.wiphy
->n_cipher_suites
--;
831 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
832 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
833 local
->hw
.wiphy
->cipher_suites
+= 2;
834 local
->hw
.wiphy
->n_cipher_suites
-= 2;
842 local
->hw
.wiphy
->cipher_suites
,
843 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
847 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
848 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
849 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
850 suite
== WLAN_CIPHER_SUITE_WEP104
)
854 local
->hw
.wiphy
->cipher_suites
= suites
;
855 local
->hw
.wiphy
->n_cipher_suites
= w
;
856 local
->wiphy_ciphers_allocated
= true;
860 if (!local
->ops
->remain_on_channel
)
861 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
863 if (local
->ops
->sched_scan_start
)
864 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
866 result
= wiphy_register(local
->hw
.wiphy
);
868 goto fail_wiphy_register
;
871 * We use the number of queues for feature tests (QoS, HT) internally
872 * so restrict them appropriately.
874 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
875 hw
->queues
= IEEE80211_MAX_QUEUES
;
878 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
879 if (!local
->workqueue
) {
885 * The hardware needs headroom for sending the frame,
886 * and we need some headroom for passing the frame to monitor
887 * interfaces, but never both at the same time.
890 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM
!=
891 sizeof(struct ieee80211_tx_status_rtap_hdr
));
893 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
894 sizeof(struct ieee80211_tx_status_rtap_hdr
));
896 debugfs_hw_add(local
);
899 * if the driver doesn't specify a max listen interval we
900 * use 5 which should be a safe default
902 if (local
->hw
.max_listen_interval
== 0)
903 local
->hw
.max_listen_interval
= 5;
905 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
907 local
->dynamic_ps_forced_timeout
= -1;
909 result
= ieee80211_wep_init(local
);
911 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
916 result
= ieee80211_init_rate_ctrl_alg(local
,
917 hw
->rate_control_algorithm
);
919 wiphy_debug(local
->hw
.wiphy
,
920 "Failed to initialize rate control algorithm\n");
924 /* add one default STA interface if supported */
925 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
926 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
927 NL80211_IFTYPE_STATION
, NULL
);
929 wiphy_warn(local
->hw
.wiphy
,
930 "Failed to add default virtual iface\n");
935 ieee80211_led_init(local
);
937 local
->network_latency_notifier
.notifier_call
=
938 ieee80211_max_network_latency
;
939 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
940 &local
->network_latency_notifier
);
947 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
948 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
953 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
954 local
->hw
.napi_weight
);
960 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
961 &local
->network_latency_notifier
);
965 ieee80211_led_exit(local
);
966 ieee80211_remove_interfaces(local
);
969 ieee80211_wep_free(local
);
970 sta_info_stop(local
);
971 destroy_workqueue(local
->workqueue
);
973 wiphy_unregister(local
->hw
.wiphy
);
975 if (local
->wiphy_ciphers_allocated
)
976 kfree(local
->hw
.wiphy
->cipher_suites
);
977 kfree(local
->int_scan_req
);
980 EXPORT_SYMBOL(ieee80211_register_hw
);
982 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
984 struct ieee80211_local
*local
= hw_to_local(hw
);
986 tasklet_kill(&local
->tx_pending_tasklet
);
987 tasklet_kill(&local
->tasklet
);
989 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
990 &local
->network_latency_notifier
);
992 unregister_inetaddr_notifier(&local
->ifa_notifier
);
998 * At this point, interface list manipulations are fine
999 * because the driver cannot be handing us frames any
1000 * more and the tasklet is killed.
1002 ieee80211_remove_interfaces(local
);
1007 * Now all work items will be gone, but the
1008 * timer might still be armed, so delete it
1010 del_timer_sync(&local
->work_timer
);
1012 cancel_work_sync(&local
->restart_work
);
1013 cancel_work_sync(&local
->reconfig_filter
);
1015 ieee80211_clear_tx_pending(local
);
1016 sta_info_stop(local
);
1017 rate_control_deinitialize(local
);
1019 if (skb_queue_len(&local
->skb_queue
) ||
1020 skb_queue_len(&local
->skb_queue_unreliable
))
1021 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1022 skb_queue_purge(&local
->skb_queue
);
1023 skb_queue_purge(&local
->skb_queue_unreliable
);
1024 skb_queue_purge(&local
->rx_skb_queue
);
1026 destroy_workqueue(local
->workqueue
);
1027 wiphy_unregister(local
->hw
.wiphy
);
1028 ieee80211_wep_free(local
);
1029 ieee80211_led_exit(local
);
1030 kfree(local
->int_scan_req
);
1032 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1034 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1036 struct ieee80211_local
*local
= hw_to_local(hw
);
1038 mutex_destroy(&local
->iflist_mtx
);
1039 mutex_destroy(&local
->mtx
);
1041 if (local
->wiphy_ciphers_allocated
)
1042 kfree(local
->hw
.wiphy
->cipher_suites
);
1044 wiphy_free(local
->hw
.wiphy
);
1046 EXPORT_SYMBOL(ieee80211_free_hw
);
1048 static int __init
ieee80211_init(void)
1050 struct sk_buff
*skb
;
1053 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1054 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1055 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1057 ret
= rc80211_minstrel_init();
1061 ret
= rc80211_minstrel_ht_init();
1065 ret
= rc80211_pid_init();
1069 ret
= ieee80211_iface_init();
1077 rc80211_minstrel_ht_exit();
1079 rc80211_minstrel_exit();
1084 static void __exit
ieee80211_exit(void)
1087 rc80211_minstrel_ht_exit();
1088 rc80211_minstrel_exit();
1093 ieee80211_iface_exit();
1099 subsys_initcall(ieee80211_init
);
1100 module_exit(ieee80211_exit
);
1102 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1103 MODULE_LICENSE("GPL");