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 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
))
52 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
54 if (local
->fif_probe_req
|| local
->probe_req_reg
)
55 new_flags
|= FIF_PROBE_REQ
;
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
;
101 enum nl80211_channel_type channel_type
;
106 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
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
= 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
)
126 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
128 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
130 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
132 if (offchannel_flag
|| chan
!= local
->hw
.conf
.channel
||
133 channel_type
!= local
->hw
.conf
.channel_type
) {
134 local
->hw
.conf
.channel
= chan
;
135 local
->hw
.conf
.channel_type
= channel_type
;
136 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
139 if (!conf_is_ht(&local
->hw
.conf
)) {
141 * mac80211.h documents that this is only valid
142 * when the channel is set to an HT type, and
143 * that otherwise STATIC is used.
145 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
146 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
147 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
148 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
151 if (test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
152 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
) ||
153 test_bit(SCAN_HW_SCANNING
, &local
->scanning
))
154 power
= chan
->max_power
;
156 power
= local
->power_constr_level
?
158 (chan
->max_reg_power
- local
->power_constr_level
)) :
161 if (local
->user_power_level
>= 0)
162 power
= min(power
, local
->user_power_level
);
164 if (local
->hw
.conf
.power_level
!= power
) {
165 changed
|= IEEE80211_CONF_CHANGE_POWER
;
166 local
->hw
.conf
.power_level
= power
;
169 if (changed
&& local
->open_count
) {
170 ret
= drv_config(local
, changed
);
173 * HW reconfiguration should never fail, the driver has told
174 * us what it can support so it should live up to that promise.
177 * rfkill is not integrated with mac80211 and a
178 * configuration command can thus fail if hardware rfkill
181 * FIXME: integrate rfkill with mac80211 and then add this
191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
194 struct ieee80211_local
*local
= sdata
->local
;
195 static const u8 zero
[ETH_ALEN
] = { 0 };
200 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
201 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
202 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
203 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
204 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
205 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
206 else if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
207 sdata
->vif
.bss_conf
.bssid
= NULL
;
208 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
209 sdata
->vif
.bss_conf
.bssid
= zero
;
210 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
211 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
212 WARN_ONCE(changed
& ~(BSS_CHANGED_IDLE
),
213 "P2P Device BSS changed %#x", changed
);
219 switch (sdata
->vif
.type
) {
220 case NL80211_IFTYPE_AP
:
221 case NL80211_IFTYPE_ADHOC
:
222 case NL80211_IFTYPE_WDS
:
223 case NL80211_IFTYPE_MESH_POINT
:
226 /* do not warn to simplify caller in scan.c */
227 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
228 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
233 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
234 if (local
->quiescing
|| !ieee80211_sdata_running(sdata
) ||
235 test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)) {
236 sdata
->vif
.bss_conf
.enable_beacon
= false;
239 * Beacon should be enabled, but AP mode must
240 * check whether there is a beacon configured.
242 switch (sdata
->vif
.type
) {
243 case NL80211_IFTYPE_AP
:
244 sdata
->vif
.bss_conf
.enable_beacon
=
245 !!sdata
->u
.ap
.beacon
;
247 case NL80211_IFTYPE_ADHOC
:
248 sdata
->vif
.bss_conf
.enable_beacon
=
249 !!sdata
->u
.ibss
.presp
;
251 #ifdef CONFIG_MAC80211_MESH
252 case NL80211_IFTYPE_MESH_POINT
:
253 sdata
->vif
.bss_conf
.enable_beacon
=
254 !!sdata
->u
.mesh
.mesh_id_len
;
265 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
268 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
270 sdata
->vif
.bss_conf
.use_cts_prot
= false;
271 sdata
->vif
.bss_conf
.use_short_preamble
= false;
272 sdata
->vif
.bss_conf
.use_short_slot
= false;
273 return BSS_CHANGED_ERP_CTS_PROT
|
274 BSS_CHANGED_ERP_PREAMBLE
|
275 BSS_CHANGED_ERP_SLOT
;
278 static void ieee80211_tasklet_handler(unsigned long data
)
280 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
281 struct sta_info
*sta
, *tmp
;
282 struct skb_eosp_msg_data
*eosp_data
;
285 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
286 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
287 switch (skb
->pkt_type
) {
288 case IEEE80211_RX_MSG
:
289 /* Clear skb->pkt_type in order to not confuse kernel
292 ieee80211_rx(&local
->hw
, skb
);
294 case IEEE80211_TX_STATUS_MSG
:
296 ieee80211_tx_status(&local
->hw
, skb
);
298 case IEEE80211_EOSP_MSG
:
299 eosp_data
= (void *)skb
->cb
;
300 for_each_sta_info(local
, eosp_data
->sta
, sta
, tmp
) {
301 /* skip wrong virtual interface */
302 if (memcmp(eosp_data
->iface
,
303 sta
->sdata
->vif
.addr
, ETH_ALEN
))
305 clear_sta_flag(sta
, WLAN_STA_SP
);
311 WARN(1, "mac80211: Packet is of unknown type %d\n",
319 static void ieee80211_restart_work(struct work_struct
*work
)
321 struct ieee80211_local
*local
=
322 container_of(work
, struct ieee80211_local
, restart_work
);
324 /* wait for scan work complete */
325 flush_workqueue(local
->workqueue
);
327 mutex_lock(&local
->mtx
);
328 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
329 rcu_dereference_protected(local
->sched_scan_sdata
,
330 lockdep_is_held(&local
->mtx
)),
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
);
354 * Stop all Rx during the reconfig. We don't want state changes
355 * or driver callbacks while this is in progress.
357 local
->in_reconfig
= true;
360 schedule_work(&local
->restart_work
);
362 EXPORT_SYMBOL(ieee80211_restart_hw
);
364 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
366 struct ieee80211_local
*local
=
367 container_of(work
, struct ieee80211_local
, recalc_smps
);
369 mutex_lock(&local
->iflist_mtx
);
370 ieee80211_recalc_smps(local
);
371 mutex_unlock(&local
->iflist_mtx
);
375 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
376 unsigned long data
, void *arg
)
378 struct in_ifaddr
*ifa
= arg
;
379 struct ieee80211_local
*local
=
380 container_of(nb
, struct ieee80211_local
,
382 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
383 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
384 struct in_device
*idev
;
385 struct ieee80211_sub_if_data
*sdata
;
386 struct ieee80211_bss_conf
*bss_conf
;
387 struct ieee80211_if_managed
*ifmgd
;
390 /* Make sure it's our interface that got changed */
394 if (wdev
->wiphy
!= local
->hw
.wiphy
)
397 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
398 bss_conf
= &sdata
->vif
.bss_conf
;
400 /* ARP filtering is only supported in managed mode */
401 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
404 idev
= __in_dev_get_rtnl(sdata
->dev
);
408 ifmgd
= &sdata
->u
.mgd
;
409 mutex_lock(&ifmgd
->mtx
);
411 /* Copy the addresses to the bss_conf list */
412 ifa
= idev
->ifa_list
;
413 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
414 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
419 /* If not all addresses fit the list, disable filtering */
421 sdata
->arp_filter_state
= false;
424 sdata
->arp_filter_state
= true;
426 bss_conf
->arp_addr_cnt
= c
;
428 /* Configure driver only if associated (which also implies it is up) */
429 if (ifmgd
->associated
) {
430 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
431 ieee80211_bss_info_change_notify(sdata
,
432 BSS_CHANGED_ARP_FILTER
);
435 mutex_unlock(&ifmgd
->mtx
);
441 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
443 struct ieee80211_local
*local
=
444 container_of(napi
, struct ieee80211_local
, napi
);
446 return local
->ops
->napi_poll(&local
->hw
, budget
);
449 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
451 struct ieee80211_local
*local
= hw_to_local(hw
);
453 napi_schedule(&local
->napi
);
455 EXPORT_SYMBOL(ieee80211_napi_schedule
);
457 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
459 struct ieee80211_local
*local
= hw_to_local(hw
);
461 napi_complete(&local
->napi
);
463 EXPORT_SYMBOL(ieee80211_napi_complete
);
465 /* There isn't a lot of sense in it, but you can transmit anything you like */
466 static const struct ieee80211_txrx_stypes
467 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
468 [NL80211_IFTYPE_ADHOC
] = {
470 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
471 BIT(IEEE80211_STYPE_AUTH
>> 4) |
472 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
474 [NL80211_IFTYPE_STATION
] = {
476 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
477 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
479 [NL80211_IFTYPE_AP
] = {
481 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
482 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
483 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
484 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
485 BIT(IEEE80211_STYPE_AUTH
>> 4) |
486 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
487 BIT(IEEE80211_STYPE_ACTION
>> 4),
489 [NL80211_IFTYPE_AP_VLAN
] = {
492 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
493 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
494 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
495 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
496 BIT(IEEE80211_STYPE_AUTH
>> 4) |
497 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
498 BIT(IEEE80211_STYPE_ACTION
>> 4),
500 [NL80211_IFTYPE_P2P_CLIENT
] = {
502 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
503 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
505 [NL80211_IFTYPE_P2P_GO
] = {
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_MESH_POINT
] = {
517 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
518 BIT(IEEE80211_STYPE_AUTH
>> 4) |
519 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
521 [NL80211_IFTYPE_P2P_DEVICE
] = {
523 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
524 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
528 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
529 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
530 IEEE80211_HT_AMPDU_PARM_DENSITY
,
532 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
533 IEEE80211_HT_CAP_MAX_AMSDU
|
534 IEEE80211_HT_CAP_SGI_40
),
536 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
537 0xff, 0xff, 0xff, 0xff, 0xff, },
541 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
542 const struct ieee80211_ops
*ops
)
544 struct ieee80211_local
*local
;
548 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
551 /* Ensure 32-byte alignment of our private data and hw private data.
552 * We use the wiphy priv data for both our ieee80211_local and for
553 * the driver's private data
555 * In memory it'll be like this:
557 * +-------------------------+
559 * +-------------------------+
560 * | struct ieee80211_local |
561 * +-------------------------+
562 * | driver's private data |
563 * +-------------------------+
566 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
568 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
573 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
575 wiphy
->privid
= mac80211_wiphy_privid
;
577 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
578 WIPHY_FLAG_4ADDR_AP
|
579 WIPHY_FLAG_4ADDR_STATION
|
580 WIPHY_FLAG_REPORTS_OBSS
|
581 WIPHY_FLAG_OFFCHAN_TX
;
583 if (ops
->remain_on_channel
)
584 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
586 wiphy
->features
= NL80211_FEATURE_SK_TX_STATUS
|
587 NL80211_FEATURE_HT_IBSS
;
590 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
592 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
594 local
= wiphy_priv(wiphy
);
596 local
->hw
.wiphy
= wiphy
;
598 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
603 BUG_ON(!ops
->config
);
604 BUG_ON(!ops
->add_interface
);
605 BUG_ON(!ops
->remove_interface
);
606 BUG_ON(!ops
->configure_filter
);
609 /* set up some defaults */
610 local
->hw
.queues
= 1;
611 local
->hw
.max_rates
= 1;
612 local
->hw
.max_report_rates
= 0;
613 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
614 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
615 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
616 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
617 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
618 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
619 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
620 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
621 local
->user_power_level
= -1;
622 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
624 INIT_LIST_HEAD(&local
->interfaces
);
626 __hw_addr_init(&local
->mc_list
);
628 mutex_init(&local
->iflist_mtx
);
629 mutex_init(&local
->mtx
);
631 mutex_init(&local
->key_mtx
);
632 spin_lock_init(&local
->filter_lock
);
633 spin_lock_init(&local
->queue_stop_reason_lock
);
636 * The rx_skb_queue is only accessed from tasklets,
637 * but other SKB queues are used from within IRQ
638 * context. Therefore, this one needs a different
639 * locking class so our direct, non-irq-safe use of
640 * the queue's lock doesn't throw lockdep warnings.
642 skb_queue_head_init_class(&local
->rx_skb_queue
,
643 &ieee80211_rx_skb_queue_class
);
645 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
647 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
649 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
650 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
651 local
->smps_mode
= IEEE80211_SMPS_OFF
;
653 INIT_WORK(&local
->dynamic_ps_enable_work
,
654 ieee80211_dynamic_ps_enable_work
);
655 INIT_WORK(&local
->dynamic_ps_disable_work
,
656 ieee80211_dynamic_ps_disable_work
);
657 setup_timer(&local
->dynamic_ps_timer
,
658 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
660 INIT_WORK(&local
->sched_scan_stopped_work
,
661 ieee80211_sched_scan_stopped_work
);
663 spin_lock_init(&local
->ack_status_lock
);
664 idr_init(&local
->ack_status_frames
);
665 /* preallocate at least one entry */
666 idr_pre_get(&local
->ack_status_frames
, GFP_KERNEL
);
668 sta_info_init(local
);
670 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
671 skb_queue_head_init(&local
->pending
[i
]);
672 atomic_set(&local
->agg_queue_stop
[i
], 0);
674 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
675 (unsigned long)local
);
677 tasklet_init(&local
->tasklet
,
678 ieee80211_tasklet_handler
,
679 (unsigned long) local
);
681 skb_queue_head_init(&local
->skb_queue
);
682 skb_queue_head_init(&local
->skb_queue_unreliable
);
684 /* init dummy netdev for use w/ NAPI */
685 init_dummy_netdev(&local
->napi_dev
);
687 ieee80211_led_names(local
);
689 ieee80211_roc_setup(local
);
693 EXPORT_SYMBOL(ieee80211_alloc_hw
);
695 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
697 struct ieee80211_local
*local
= hw_to_local(hw
);
699 enum ieee80211_band band
;
700 int channels
, max_bitrates
;
701 bool supp_ht
, supp_vht
;
702 netdev_features_t feature_whitelist
;
703 static const u32 cipher_suites
[] = {
704 /* keep WEP first, it may be removed below */
705 WLAN_CIPHER_SUITE_WEP40
,
706 WLAN_CIPHER_SUITE_WEP104
,
707 WLAN_CIPHER_SUITE_TKIP
,
708 WLAN_CIPHER_SUITE_CCMP
,
710 /* keep last -- depends on hw flags! */
711 WLAN_CIPHER_SUITE_AES_CMAC
714 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
715 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
716 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
720 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
) &&
721 (!local
->ops
->suspend
|| !local
->ops
->resume
))
725 if ((hw
->flags
& IEEE80211_HW_SCAN_WHILE_IDLE
) && !local
->ops
->hw_scan
)
728 /* Only HW csum features are currently compatible with mac80211 */
729 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
731 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
734 if (hw
->max_report_rates
== 0)
735 hw
->max_report_rates
= hw
->max_rates
;
738 * generic code guarantees at least one band,
739 * set this very early because much code assumes
740 * that hw.conf.channel is assigned
746 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
747 struct ieee80211_supported_band
*sband
;
749 sband
= local
->hw
.wiphy
->bands
[band
];
752 if (!local
->oper_channel
) {
753 /* init channel we're on */
754 local
->hw
.conf
.channel
=
755 local
->oper_channel
= &sband
->channels
[0];
756 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
758 channels
+= sband
->n_channels
;
760 if (max_bitrates
< sband
->n_bitrates
)
761 max_bitrates
= sband
->n_bitrates
;
762 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
763 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
766 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
767 sizeof(void *) * channels
, GFP_KERNEL
);
768 if (!local
->int_scan_req
)
771 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
772 if (!local
->hw
.wiphy
->bands
[band
])
774 local
->int_scan_req
->rates
[band
] = (u32
) -1;
777 /* if low-level driver supports AP, we also support VLAN */
778 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
779 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
780 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
783 /* mac80211 always supports monitor */
784 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
785 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
788 * mac80211 doesn't support more than 1 channel, and also not more
789 * than one IBSS interface
791 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
792 const struct ieee80211_iface_combination
*c
;
795 c
= &hw
->wiphy
->iface_combinations
[i
];
797 if (c
->num_different_channels
> 1)
800 for (j
= 0; j
< c
->n_limits
; j
++)
801 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
802 c
->limits
[j
].max
> 1)
806 #ifndef CONFIG_MAC80211_MESH
807 /* mesh depends on Kconfig, but drivers should set it if they want */
808 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
811 /* if the underlying driver supports mesh, mac80211 will (at least)
812 * provide routing of mesh authentication frames to userspace */
813 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
814 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
816 /* mac80211 supports control port protocol changing */
817 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
819 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
820 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
821 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
822 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
824 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
825 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
826 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
829 * Calculate scan IE length -- we need this to alloc
830 * memory and to subtract from the driver limit. It
831 * includes the DS Params, (extended) supported rates, and HT
832 * information -- SSID is the driver's responsibility.
834 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
837 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
840 local
->scan_ies_len
+=
841 2 + sizeof(struct ieee80211_vht_capabilities
);
843 if (!local
->ops
->hw_scan
) {
844 /* For hw_scan, driver needs to set these up. */
845 local
->hw
.wiphy
->max_scan_ssids
= 4;
846 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
850 * If the driver supports any scan IEs, then assume the
851 * limit includes the IEs mac80211 will add, otherwise
852 * leave it at zero and let the driver sort it out; we
853 * still pass our IEs to the driver but userspace will
854 * not be allowed to in that case.
856 if (local
->hw
.wiphy
->max_scan_ie_len
)
857 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
859 /* Set up cipher suites unless driver already did */
860 if (!local
->hw
.wiphy
->cipher_suites
) {
861 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
862 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
863 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
864 local
->hw
.wiphy
->n_cipher_suites
--;
866 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
867 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
868 local
->hw
.wiphy
->cipher_suites
+= 2;
869 local
->hw
.wiphy
->n_cipher_suites
-= 2;
877 local
->hw
.wiphy
->cipher_suites
,
878 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
882 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
883 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
884 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
885 suite
== WLAN_CIPHER_SUITE_WEP104
)
889 local
->hw
.wiphy
->cipher_suites
= suites
;
890 local
->hw
.wiphy
->n_cipher_suites
= w
;
891 local
->wiphy_ciphers_allocated
= true;
895 if (!local
->ops
->remain_on_channel
)
896 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
898 if (local
->ops
->sched_scan_start
)
899 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
901 /* mac80211 based drivers don't support internal TDLS setup */
902 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
903 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
905 result
= wiphy_register(local
->hw
.wiphy
);
907 goto fail_wiphy_register
;
910 * We use the number of queues for feature tests (QoS, HT) internally
911 * so restrict them appropriately.
913 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
914 hw
->queues
= IEEE80211_MAX_QUEUES
;
917 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
918 if (!local
->workqueue
) {
924 * The hardware needs headroom for sending the frame,
925 * and we need some headroom for passing the frame to monitor
926 * interfaces, but never both at the same time.
928 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
929 IEEE80211_TX_STATUS_HEADROOM
);
931 debugfs_hw_add(local
);
934 * if the driver doesn't specify a max listen interval we
935 * use 5 which should be a safe default
937 if (local
->hw
.max_listen_interval
== 0)
938 local
->hw
.max_listen_interval
= 5;
940 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
942 local
->dynamic_ps_forced_timeout
= -1;
944 result
= ieee80211_wep_init(local
);
946 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
949 ieee80211_led_init(local
);
953 result
= ieee80211_init_rate_ctrl_alg(local
,
954 hw
->rate_control_algorithm
);
956 wiphy_debug(local
->hw
.wiphy
,
957 "Failed to initialize rate control algorithm\n");
961 /* add one default STA interface if supported */
962 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
963 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
964 NL80211_IFTYPE_STATION
, NULL
);
966 wiphy_warn(local
->hw
.wiphy
,
967 "Failed to add default virtual iface\n");
972 local
->network_latency_notifier
.notifier_call
=
973 ieee80211_max_network_latency
;
974 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
975 &local
->network_latency_notifier
);
982 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
983 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
988 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
989 local
->hw
.napi_weight
);
995 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
996 &local
->network_latency_notifier
);
1000 ieee80211_led_exit(local
);
1001 ieee80211_remove_interfaces(local
);
1004 ieee80211_wep_free(local
);
1005 sta_info_stop(local
);
1006 destroy_workqueue(local
->workqueue
);
1008 wiphy_unregister(local
->hw
.wiphy
);
1009 fail_wiphy_register
:
1010 if (local
->wiphy_ciphers_allocated
)
1011 kfree(local
->hw
.wiphy
->cipher_suites
);
1012 kfree(local
->int_scan_req
);
1015 EXPORT_SYMBOL(ieee80211_register_hw
);
1017 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1019 struct ieee80211_local
*local
= hw_to_local(hw
);
1021 tasklet_kill(&local
->tx_pending_tasklet
);
1022 tasklet_kill(&local
->tasklet
);
1024 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1025 &local
->network_latency_notifier
);
1027 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1033 * At this point, interface list manipulations are fine
1034 * because the driver cannot be handing us frames any
1035 * more and the tasklet is killed.
1037 ieee80211_remove_interfaces(local
);
1041 cancel_work_sync(&local
->restart_work
);
1042 cancel_work_sync(&local
->reconfig_filter
);
1044 ieee80211_clear_tx_pending(local
);
1045 rate_control_deinitialize(local
);
1047 if (skb_queue_len(&local
->skb_queue
) ||
1048 skb_queue_len(&local
->skb_queue_unreliable
))
1049 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1050 skb_queue_purge(&local
->skb_queue
);
1051 skb_queue_purge(&local
->skb_queue_unreliable
);
1052 skb_queue_purge(&local
->rx_skb_queue
);
1054 destroy_workqueue(local
->workqueue
);
1055 wiphy_unregister(local
->hw
.wiphy
);
1056 sta_info_stop(local
);
1057 ieee80211_wep_free(local
);
1058 ieee80211_led_exit(local
);
1059 kfree(local
->int_scan_req
);
1061 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1063 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1065 WARN_ONCE(1, "Have pending ack frames!\n");
1070 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1072 struct ieee80211_local
*local
= hw_to_local(hw
);
1074 mutex_destroy(&local
->iflist_mtx
);
1075 mutex_destroy(&local
->mtx
);
1077 if (local
->wiphy_ciphers_allocated
)
1078 kfree(local
->hw
.wiphy
->cipher_suites
);
1080 idr_for_each(&local
->ack_status_frames
,
1081 ieee80211_free_ack_frame
, NULL
);
1082 idr_destroy(&local
->ack_status_frames
);
1084 wiphy_free(local
->hw
.wiphy
);
1086 EXPORT_SYMBOL(ieee80211_free_hw
);
1088 static int __init
ieee80211_init(void)
1090 struct sk_buff
*skb
;
1093 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1094 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1095 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1097 ret
= rc80211_minstrel_init();
1101 ret
= rc80211_minstrel_ht_init();
1105 ret
= rc80211_pid_init();
1109 ret
= ieee80211_iface_init();
1117 rc80211_minstrel_ht_exit();
1119 rc80211_minstrel_exit();
1124 static void __exit
ieee80211_exit(void)
1127 rc80211_minstrel_ht_exit();
1128 rc80211_minstrel_exit();
1133 ieee80211_iface_exit();
1139 subsys_initcall(ieee80211_init
);
1140 module_exit(ieee80211_exit
);
1142 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1143 MODULE_LICENSE("GPL");