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
|| test_bit(SCAN_SW_SCANNING
, &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
;
100 enum nl80211_channel_type channel_type
;
105 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
106 if (local
->scan_channel
) {
107 chan
= local
->scan_channel
;
108 /* If scanning on oper channel, use whatever channel-type
109 * is currently in use.
111 if (chan
== local
->oper_channel
)
112 channel_type
= local
->_oper_channel_type
;
114 channel_type
= NL80211_CHAN_NO_HT
;
115 } else if (local
->tmp_channel
) {
116 chan
= local
->tmp_channel
;
117 channel_type
= local
->tmp_channel_type
;
119 chan
= local
->oper_channel
;
120 channel_type
= local
->_oper_channel_type
;
123 if (chan
!= local
->oper_channel
||
124 channel_type
!= local
->_oper_channel_type
)
125 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
127 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 (test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
151 test_bit(SCAN_HW_SCANNING
, &local
->scanning
))
152 power
= chan
->max_power
;
154 power
= local
->power_constr_level
?
156 (chan
->max_reg_power
- local
->power_constr_level
)) :
159 if (local
->user_power_level
>= 0)
160 power
= min(power
, local
->user_power_level
);
162 if (local
->hw
.conf
.power_level
!= power
) {
163 changed
|= IEEE80211_CONF_CHANGE_POWER
;
164 local
->hw
.conf
.power_level
= power
;
167 if (changed
&& local
->open_count
) {
168 ret
= drv_config(local
, changed
);
171 * HW reconfiguration should never fail, the driver has told
172 * us what it can support so it should live up to that promise.
175 * rfkill is not integrated with mac80211 and a
176 * configuration command can thus fail if hardware rfkill
179 * FIXME: integrate rfkill with mac80211 and then add this
189 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
192 struct ieee80211_local
*local
= sdata
->local
;
193 static const u8 zero
[ETH_ALEN
] = { 0 };
198 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
199 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
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(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)) {
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 #ifdef CONFIG_MAC80211_MESH
246 case NL80211_IFTYPE_MESH_POINT
:
247 sdata
->vif
.bss_conf
.enable_beacon
=
248 !!sdata
->u
.mesh
.mesh_id_len
;
259 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
262 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
264 sdata
->vif
.bss_conf
.use_cts_prot
= false;
265 sdata
->vif
.bss_conf
.use_short_preamble
= false;
266 sdata
->vif
.bss_conf
.use_short_slot
= false;
267 return BSS_CHANGED_ERP_CTS_PROT
|
268 BSS_CHANGED_ERP_PREAMBLE
|
269 BSS_CHANGED_ERP_SLOT
;
272 static void ieee80211_tasklet_handler(unsigned long data
)
274 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
275 struct sta_info
*sta
, *tmp
;
276 struct skb_eosp_msg_data
*eosp_data
;
279 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
280 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
281 switch (skb
->pkt_type
) {
282 case IEEE80211_RX_MSG
:
283 /* Clear skb->pkt_type in order to not confuse kernel
286 ieee80211_rx(&local
->hw
, skb
);
288 case IEEE80211_TX_STATUS_MSG
:
290 ieee80211_tx_status(&local
->hw
, skb
);
292 case IEEE80211_EOSP_MSG
:
293 eosp_data
= (void *)skb
->cb
;
294 for_each_sta_info(local
, eosp_data
->sta
, sta
, tmp
) {
295 /* skip wrong virtual interface */
296 if (memcmp(eosp_data
->iface
,
297 sta
->sdata
->vif
.addr
, ETH_ALEN
))
299 clear_sta_flag(sta
, WLAN_STA_SP
);
305 WARN(1, "mac80211: Packet is of unknown type %d\n",
313 static void ieee80211_restart_work(struct work_struct
*work
)
315 struct ieee80211_local
*local
=
316 container_of(work
, struct ieee80211_local
, restart_work
);
318 /* wait for scan work complete */
319 flush_workqueue(local
->workqueue
);
321 mutex_lock(&local
->mtx
);
322 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
323 local
->sched_scanning
,
324 "%s called with hardware scan in progress\n", __func__
);
325 mutex_unlock(&local
->mtx
);
328 ieee80211_scan_cancel(local
);
329 ieee80211_reconfig(local
);
333 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
335 struct ieee80211_local
*local
= hw_to_local(hw
);
337 trace_api_restart_hw(local
);
339 wiphy_info(hw
->wiphy
,
340 "Hardware restart was requested\n");
342 /* use this reason, ieee80211_reconfig will unblock it */
343 ieee80211_stop_queues_by_reason(hw
,
344 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
346 schedule_work(&local
->restart_work
);
348 EXPORT_SYMBOL(ieee80211_restart_hw
);
350 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
352 struct ieee80211_local
*local
=
353 container_of(work
, struct ieee80211_local
, recalc_smps
);
355 mutex_lock(&local
->iflist_mtx
);
356 ieee80211_recalc_smps(local
);
357 mutex_unlock(&local
->iflist_mtx
);
361 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
362 unsigned long data
, void *arg
)
364 struct in_ifaddr
*ifa
= arg
;
365 struct ieee80211_local
*local
=
366 container_of(nb
, struct ieee80211_local
,
368 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
369 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
370 struct in_device
*idev
;
371 struct ieee80211_sub_if_data
*sdata
;
372 struct ieee80211_bss_conf
*bss_conf
;
373 struct ieee80211_if_managed
*ifmgd
;
376 /* Make sure it's our interface that got changed */
380 if (wdev
->wiphy
!= local
->hw
.wiphy
)
383 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
384 bss_conf
= &sdata
->vif
.bss_conf
;
386 /* ARP filtering is only supported in managed mode */
387 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
390 idev
= __in_dev_get_rtnl(sdata
->dev
);
394 ifmgd
= &sdata
->u
.mgd
;
395 mutex_lock(&ifmgd
->mtx
);
397 /* Copy the addresses to the bss_conf list */
398 ifa
= idev
->ifa_list
;
399 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
400 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
405 /* If not all addresses fit the list, disable filtering */
407 sdata
->arp_filter_state
= false;
410 sdata
->arp_filter_state
= true;
412 bss_conf
->arp_addr_cnt
= c
;
414 /* Configure driver only if associated (which also implies it is up) */
415 if (ifmgd
->associated
) {
416 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
417 ieee80211_bss_info_change_notify(sdata
,
418 BSS_CHANGED_ARP_FILTER
);
421 mutex_unlock(&ifmgd
->mtx
);
427 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
429 struct ieee80211_local
*local
=
430 container_of(napi
, struct ieee80211_local
, napi
);
432 return local
->ops
->napi_poll(&local
->hw
, budget
);
435 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
437 struct ieee80211_local
*local
= hw_to_local(hw
);
439 napi_schedule(&local
->napi
);
441 EXPORT_SYMBOL(ieee80211_napi_schedule
);
443 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
445 struct ieee80211_local
*local
= hw_to_local(hw
);
447 napi_complete(&local
->napi
);
449 EXPORT_SYMBOL(ieee80211_napi_complete
);
451 /* There isn't a lot of sense in it, but you can transmit anything you like */
452 static const struct ieee80211_txrx_stypes
453 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
454 [NL80211_IFTYPE_ADHOC
] = {
456 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4),
458 [NL80211_IFTYPE_STATION
] = {
460 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
461 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
463 [NL80211_IFTYPE_AP
] = {
465 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
466 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
468 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
469 BIT(IEEE80211_STYPE_AUTH
>> 4) |
470 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
471 BIT(IEEE80211_STYPE_ACTION
>> 4),
473 [NL80211_IFTYPE_AP_VLAN
] = {
476 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
477 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
478 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
479 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
480 BIT(IEEE80211_STYPE_AUTH
>> 4) |
481 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
482 BIT(IEEE80211_STYPE_ACTION
>> 4),
484 [NL80211_IFTYPE_P2P_CLIENT
] = {
486 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
487 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
489 [NL80211_IFTYPE_P2P_GO
] = {
491 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
492 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
493 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
494 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
495 BIT(IEEE80211_STYPE_AUTH
>> 4) |
496 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
497 BIT(IEEE80211_STYPE_ACTION
>> 4),
499 [NL80211_IFTYPE_MESH_POINT
] = {
501 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
502 BIT(IEEE80211_STYPE_AUTH
>> 4) |
503 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
507 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
508 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
509 IEEE80211_HT_AMPDU_PARM_DENSITY
,
511 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
512 IEEE80211_HT_CAP_MAX_AMSDU
|
513 IEEE80211_HT_CAP_SGI_40
),
515 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
516 0xff, 0xff, 0xff, 0xff, 0xff, },
520 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
521 const struct ieee80211_ops
*ops
)
523 struct ieee80211_local
*local
;
527 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
530 /* Ensure 32-byte alignment of our private data and hw private data.
531 * We use the wiphy priv data for both our ieee80211_local and for
532 * the driver's private data
534 * In memory it'll be like this:
536 * +-------------------------+
538 * +-------------------------+
539 * | struct ieee80211_local |
540 * +-------------------------+
541 * | driver's private data |
542 * +-------------------------+
545 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
547 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
552 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
554 wiphy
->privid
= mac80211_wiphy_privid
;
556 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
557 WIPHY_FLAG_4ADDR_AP
|
558 WIPHY_FLAG_4ADDR_STATION
|
559 WIPHY_FLAG_REPORTS_OBSS
|
560 WIPHY_FLAG_OFFCHAN_TX
;
562 if (ops
->remain_on_channel
)
563 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
565 wiphy
->features
= NL80211_FEATURE_SK_TX_STATUS
|
566 NL80211_FEATURE_HT_IBSS
;
569 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
571 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
573 local
= wiphy_priv(wiphy
);
575 local
->hw
.wiphy
= wiphy
;
577 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
579 BUG_ON(!ops
->tx
&& !ops
->tx_frags
);
582 BUG_ON(!ops
->config
);
583 BUG_ON(!ops
->add_interface
);
584 BUG_ON(!ops
->remove_interface
);
585 BUG_ON(!ops
->configure_filter
);
588 /* set up some defaults */
589 local
->hw
.queues
= 1;
590 local
->hw
.max_rates
= 1;
591 local
->hw
.max_report_rates
= 0;
592 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
593 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
594 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
595 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
596 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
597 local
->user_power_level
= -1;
598 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
600 INIT_LIST_HEAD(&local
->interfaces
);
602 __hw_addr_init(&local
->mc_list
);
604 mutex_init(&local
->iflist_mtx
);
605 mutex_init(&local
->mtx
);
607 mutex_init(&local
->key_mtx
);
608 spin_lock_init(&local
->filter_lock
);
609 spin_lock_init(&local
->queue_stop_reason_lock
);
612 * The rx_skb_queue is only accessed from tasklets,
613 * but other SKB queues are used from within IRQ
614 * context. Therefore, this one needs a different
615 * locking class so our direct, non-irq-safe use of
616 * the queue's lock doesn't throw lockdep warnings.
618 skb_queue_head_init_class(&local
->rx_skb_queue
,
619 &ieee80211_rx_skb_queue_class
);
621 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
623 ieee80211_work_init(local
);
625 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
627 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
628 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
629 local
->smps_mode
= IEEE80211_SMPS_OFF
;
631 INIT_WORK(&local
->dynamic_ps_enable_work
,
632 ieee80211_dynamic_ps_enable_work
);
633 INIT_WORK(&local
->dynamic_ps_disable_work
,
634 ieee80211_dynamic_ps_disable_work
);
635 setup_timer(&local
->dynamic_ps_timer
,
636 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
638 INIT_WORK(&local
->sched_scan_stopped_work
,
639 ieee80211_sched_scan_stopped_work
);
641 spin_lock_init(&local
->ack_status_lock
);
642 idr_init(&local
->ack_status_frames
);
643 /* preallocate at least one entry */
644 idr_pre_get(&local
->ack_status_frames
, GFP_KERNEL
);
646 sta_info_init(local
);
648 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
649 skb_queue_head_init(&local
->pending
[i
]);
650 atomic_set(&local
->agg_queue_stop
[i
], 0);
652 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
653 (unsigned long)local
);
655 tasklet_init(&local
->tasklet
,
656 ieee80211_tasklet_handler
,
657 (unsigned long) local
);
659 skb_queue_head_init(&local
->skb_queue
);
660 skb_queue_head_init(&local
->skb_queue_unreliable
);
662 /* init dummy netdev for use w/ NAPI */
663 init_dummy_netdev(&local
->napi_dev
);
665 ieee80211_led_names(local
);
667 ieee80211_hw_roc_setup(local
);
671 EXPORT_SYMBOL(ieee80211_alloc_hw
);
673 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
675 struct ieee80211_local
*local
= hw_to_local(hw
);
677 enum ieee80211_band band
;
678 int channels
, max_bitrates
;
680 static const u32 cipher_suites
[] = {
681 /* keep WEP first, it may be removed below */
682 WLAN_CIPHER_SUITE_WEP40
,
683 WLAN_CIPHER_SUITE_WEP104
,
684 WLAN_CIPHER_SUITE_TKIP
,
685 WLAN_CIPHER_SUITE_CCMP
,
687 /* keep last -- depends on hw flags! */
688 WLAN_CIPHER_SUITE_AES_CMAC
691 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
692 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
693 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
696 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
)
698 && (!local
->ops
->suspend
|| !local
->ops
->resume
)
703 if ((hw
->flags
& IEEE80211_HW_SCAN_WHILE_IDLE
) && !local
->ops
->hw_scan
)
706 if (hw
->max_report_rates
== 0)
707 hw
->max_report_rates
= hw
->max_rates
;
710 * generic code guarantees at least one band,
711 * set this very early because much code assumes
712 * that hw.conf.channel is assigned
717 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
718 struct ieee80211_supported_band
*sband
;
720 sband
= local
->hw
.wiphy
->bands
[band
];
723 if (!local
->oper_channel
) {
724 /* init channel we're on */
725 local
->hw
.conf
.channel
=
726 local
->oper_channel
= &sband
->channels
[0];
727 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
729 channels
+= sband
->n_channels
;
731 if (max_bitrates
< sband
->n_bitrates
)
732 max_bitrates
= sband
->n_bitrates
;
733 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
736 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
737 sizeof(void *) * channels
, GFP_KERNEL
);
738 if (!local
->int_scan_req
)
741 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
742 if (!local
->hw
.wiphy
->bands
[band
])
744 local
->int_scan_req
->rates
[band
] = (u32
) -1;
747 /* if low-level driver supports AP, we also support VLAN */
748 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
749 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
750 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
753 /* mac80211 always supports monitor */
754 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
755 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
758 * mac80211 doesn't support more than 1 channel, and also not more
759 * than one IBSS interface
761 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
762 const struct ieee80211_iface_combination
*c
;
765 c
= &hw
->wiphy
->iface_combinations
[i
];
767 if (c
->num_different_channels
> 1)
770 for (j
= 0; j
< c
->n_limits
; j
++)
771 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
772 c
->limits
[j
].max
> 1)
776 #ifndef CONFIG_MAC80211_MESH
777 /* mesh depends on Kconfig, but drivers should set it if they want */
778 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
781 /* if the underlying driver supports mesh, mac80211 will (at least)
782 * provide routing of mesh authentication frames to userspace */
783 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
784 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
786 /* mac80211 supports control port protocol changing */
787 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
789 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
790 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
791 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
792 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
794 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
795 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
796 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
799 * Calculate scan IE length -- we need this to alloc
800 * memory and to subtract from the driver limit. It
801 * includes the DS Params, (extended) supported rates, and HT
802 * information -- SSID is the driver's responsibility.
804 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
807 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
809 if (!local
->ops
->hw_scan
) {
810 /* For hw_scan, driver needs to set these up. */
811 local
->hw
.wiphy
->max_scan_ssids
= 4;
812 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
816 * If the driver supports any scan IEs, then assume the
817 * limit includes the IEs mac80211 will add, otherwise
818 * leave it at zero and let the driver sort it out; we
819 * still pass our IEs to the driver but userspace will
820 * not be allowed to in that case.
822 if (local
->hw
.wiphy
->max_scan_ie_len
)
823 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
825 /* Set up cipher suites unless driver already did */
826 if (!local
->hw
.wiphy
->cipher_suites
) {
827 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
828 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
829 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
830 local
->hw
.wiphy
->n_cipher_suites
--;
832 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
833 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
834 local
->hw
.wiphy
->cipher_suites
+= 2;
835 local
->hw
.wiphy
->n_cipher_suites
-= 2;
843 local
->hw
.wiphy
->cipher_suites
,
844 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
848 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
849 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
850 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
851 suite
== WLAN_CIPHER_SUITE_WEP104
)
855 local
->hw
.wiphy
->cipher_suites
= suites
;
856 local
->hw
.wiphy
->n_cipher_suites
= w
;
857 local
->wiphy_ciphers_allocated
= true;
861 if (!local
->ops
->remain_on_channel
)
862 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
864 if (local
->ops
->sched_scan_start
)
865 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
867 /* mac80211 based drivers don't support internal TDLS setup */
868 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
869 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
871 result
= wiphy_register(local
->hw
.wiphy
);
873 goto fail_wiphy_register
;
876 * We use the number of queues for feature tests (QoS, HT) internally
877 * so restrict them appropriately.
879 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
880 hw
->queues
= IEEE80211_MAX_QUEUES
;
883 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
884 if (!local
->workqueue
) {
890 * The hardware needs headroom for sending the frame,
891 * and we need some headroom for passing the frame to monitor
892 * interfaces, but never both at the same time.
894 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
895 IEEE80211_TX_STATUS_HEADROOM
);
897 debugfs_hw_add(local
);
900 * if the driver doesn't specify a max listen interval we
901 * use 5 which should be a safe default
903 if (local
->hw
.max_listen_interval
== 0)
904 local
->hw
.max_listen_interval
= 5;
906 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
908 local
->dynamic_ps_forced_timeout
= -1;
910 result
= ieee80211_wep_init(local
);
912 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
915 ieee80211_led_init(local
);
919 result
= ieee80211_init_rate_ctrl_alg(local
,
920 hw
->rate_control_algorithm
);
922 wiphy_debug(local
->hw
.wiphy
,
923 "Failed to initialize rate control algorithm\n");
927 /* add one default STA interface if supported */
928 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
929 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
930 NL80211_IFTYPE_STATION
, NULL
);
932 wiphy_warn(local
->hw
.wiphy
,
933 "Failed to add default virtual iface\n");
938 local
->network_latency_notifier
.notifier_call
=
939 ieee80211_max_network_latency
;
940 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
941 &local
->network_latency_notifier
);
948 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
949 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
954 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
955 local
->hw
.napi_weight
);
961 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
962 &local
->network_latency_notifier
);
966 ieee80211_led_exit(local
);
967 ieee80211_remove_interfaces(local
);
970 ieee80211_wep_free(local
);
971 sta_info_stop(local
);
972 destroy_workqueue(local
->workqueue
);
974 wiphy_unregister(local
->hw
.wiphy
);
976 if (local
->wiphy_ciphers_allocated
)
977 kfree(local
->hw
.wiphy
->cipher_suites
);
978 kfree(local
->int_scan_req
);
981 EXPORT_SYMBOL(ieee80211_register_hw
);
983 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
985 struct ieee80211_local
*local
= hw_to_local(hw
);
987 tasklet_kill(&local
->tx_pending_tasklet
);
988 tasklet_kill(&local
->tasklet
);
990 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
991 &local
->network_latency_notifier
);
993 unregister_inetaddr_notifier(&local
->ifa_notifier
);
999 * At this point, interface list manipulations are fine
1000 * because the driver cannot be handing us frames any
1001 * more and the tasklet is killed.
1003 ieee80211_remove_interfaces(local
);
1008 * Now all work items will be gone, but the
1009 * timer might still be armed, so delete it
1011 del_timer_sync(&local
->work_timer
);
1013 cancel_work_sync(&local
->restart_work
);
1014 cancel_work_sync(&local
->reconfig_filter
);
1016 ieee80211_clear_tx_pending(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 sta_info_stop(local
);
1029 ieee80211_wep_free(local
);
1030 ieee80211_led_exit(local
);
1031 kfree(local
->int_scan_req
);
1033 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1035 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1037 WARN_ONCE(1, "Have pending ack frames!\n");
1042 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1044 struct ieee80211_local
*local
= hw_to_local(hw
);
1046 mutex_destroy(&local
->iflist_mtx
);
1047 mutex_destroy(&local
->mtx
);
1049 if (local
->wiphy_ciphers_allocated
)
1050 kfree(local
->hw
.wiphy
->cipher_suites
);
1052 idr_for_each(&local
->ack_status_frames
,
1053 ieee80211_free_ack_frame
, NULL
);
1054 idr_destroy(&local
->ack_status_frames
);
1056 wiphy_free(local
->hw
.wiphy
);
1058 EXPORT_SYMBOL(ieee80211_free_hw
);
1060 static int __init
ieee80211_init(void)
1062 struct sk_buff
*skb
;
1065 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1066 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1067 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1069 ret
= rc80211_minstrel_init();
1073 ret
= rc80211_minstrel_ht_init();
1077 ret
= rc80211_pid_init();
1081 ret
= ieee80211_iface_init();
1089 rc80211_minstrel_ht_exit();
1091 rc80211_minstrel_exit();
1096 static void __exit
ieee80211_exit(void)
1099 rc80211_minstrel_ht_exit();
1100 rc80211_minstrel_exit();
1105 ieee80211_iface_exit();
1111 subsys_initcall(ieee80211_init
);
1112 module_exit(ieee80211_exit
);
1114 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1115 MODULE_LICENSE("GPL");