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>
26 #include <net/addrconf.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
37 void ieee80211_configure_filter(struct ieee80211_local
*local
)
40 unsigned int changed_flags
;
41 unsigned int new_flags
= 0;
43 if (atomic_read(&local
->iff_promiscs
))
44 new_flags
|= FIF_PROMISC_IN_BSS
;
46 if (atomic_read(&local
->iff_allmultis
))
47 new_flags
|= FIF_ALLMULTI
;
49 if (local
->monitors
|| test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
50 test_bit(SCAN_ONCHANNEL_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 static u32
ieee80211_hw_conf_chan(struct ieee80211_local
*local
)
97 struct ieee80211_sub_if_data
*sdata
;
98 struct cfg80211_chan_def chandef
= {};
103 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
105 if (local
->scan_channel
) {
106 chandef
.chan
= local
->scan_channel
;
107 /* If scanning on oper channel, use whatever channel-type
108 * is currently in use.
110 if (chandef
.chan
== local
->_oper_chandef
.chan
) {
111 chandef
= local
->_oper_chandef
;
113 chandef
.width
= NL80211_CHAN_WIDTH_20_NOHT
;
114 chandef
.center_freq1
= chandef
.chan
->center_freq
;
116 } else if (local
->tmp_channel
) {
117 chandef
.chan
= local
->tmp_channel
;
118 chandef
.width
= NL80211_CHAN_WIDTH_20_NOHT
;
119 chandef
.center_freq1
= chandef
.chan
->center_freq
;
121 chandef
= local
->_oper_chandef
;
123 WARN(!cfg80211_chandef_valid(&chandef
),
124 "control:%d MHz width:%d center: %d/%d MHz",
125 chandef
.chan
->center_freq
, chandef
.width
,
126 chandef
.center_freq1
, chandef
.center_freq2
);
128 if (!cfg80211_chandef_identical(&chandef
, &local
->_oper_chandef
))
129 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
131 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
133 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
135 if (offchannel_flag
||
136 !cfg80211_chandef_identical(&local
->hw
.conf
.chandef
,
137 &local
->_oper_chandef
)) {
138 local
->hw
.conf
.chandef
= chandef
;
139 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
142 if (!conf_is_ht(&local
->hw
.conf
)) {
144 * mac80211.h documents that this is only valid
145 * when the channel is set to an HT type, and
146 * that otherwise STATIC is used.
148 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
149 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
150 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
151 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
154 power
= chandef
.chan
->max_power
;
157 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
158 if (!rcu_access_pointer(sdata
->vif
.chanctx_conf
))
160 power
= min(power
, sdata
->vif
.bss_conf
.txpower
);
164 if (local
->hw
.conf
.power_level
!= power
) {
165 changed
|= IEEE80211_CONF_CHANGE_POWER
;
166 local
->hw
.conf
.power_level
= power
;
172 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
178 if (!local
->use_chanctx
)
179 changed
|= ieee80211_hw_conf_chan(local
);
181 changed
&= ~(IEEE80211_CONF_CHANGE_CHANNEL
|
182 IEEE80211_CONF_CHANGE_POWER
);
184 if (changed
&& local
->open_count
) {
185 ret
= drv_config(local
, changed
);
188 * HW reconfiguration should never fail, the driver has told
189 * us what it can support so it should live up to that promise.
192 * rfkill is not integrated with mac80211 and a
193 * configuration command can thus fail if hardware rfkill
196 * FIXME: integrate rfkill with mac80211 and then add this
206 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
209 struct ieee80211_local
*local
= sdata
->local
;
214 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
217 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
219 sdata
->vif
.bss_conf
.use_cts_prot
= false;
220 sdata
->vif
.bss_conf
.use_short_preamble
= false;
221 sdata
->vif
.bss_conf
.use_short_slot
= false;
222 return BSS_CHANGED_ERP_CTS_PROT
|
223 BSS_CHANGED_ERP_PREAMBLE
|
224 BSS_CHANGED_ERP_SLOT
;
227 static void ieee80211_tasklet_handler(unsigned long data
)
229 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
232 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
233 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
234 switch (skb
->pkt_type
) {
235 case IEEE80211_RX_MSG
:
236 /* Clear skb->pkt_type in order to not confuse kernel
239 ieee80211_rx(&local
->hw
, skb
);
241 case IEEE80211_TX_STATUS_MSG
:
243 ieee80211_tx_status(&local
->hw
, skb
);
246 WARN(1, "mac80211: Packet is of unknown type %d\n",
254 static void ieee80211_restart_work(struct work_struct
*work
)
256 struct ieee80211_local
*local
=
257 container_of(work
, struct ieee80211_local
, restart_work
);
259 /* wait for scan work complete */
260 flush_workqueue(local
->workqueue
);
262 mutex_lock(&local
->mtx
);
263 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
264 rcu_dereference_protected(local
->sched_scan_sdata
,
265 lockdep_is_held(&local
->mtx
)),
266 "%s called with hardware scan in progress\n", __func__
);
267 mutex_unlock(&local
->mtx
);
270 ieee80211_scan_cancel(local
);
271 ieee80211_reconfig(local
);
275 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
277 struct ieee80211_local
*local
= hw_to_local(hw
);
279 trace_api_restart_hw(local
);
281 wiphy_info(hw
->wiphy
,
282 "Hardware restart was requested\n");
284 /* use this reason, ieee80211_reconfig will unblock it */
285 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
286 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
289 * Stop all Rx during the reconfig. We don't want state changes
290 * or driver callbacks while this is in progress.
292 local
->in_reconfig
= true;
295 schedule_work(&local
->restart_work
);
297 EXPORT_SYMBOL(ieee80211_restart_hw
);
300 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
301 unsigned long data
, void *arg
)
303 struct in_ifaddr
*ifa
= arg
;
304 struct ieee80211_local
*local
=
305 container_of(nb
, struct ieee80211_local
,
307 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
308 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
309 struct in_device
*idev
;
310 struct ieee80211_sub_if_data
*sdata
;
311 struct ieee80211_bss_conf
*bss_conf
;
312 struct ieee80211_if_managed
*ifmgd
;
315 /* Make sure it's our interface that got changed */
319 if (wdev
->wiphy
!= local
->hw
.wiphy
)
322 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
323 bss_conf
= &sdata
->vif
.bss_conf
;
325 /* ARP filtering is only supported in managed mode */
326 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
329 idev
= __in_dev_get_rtnl(sdata
->dev
);
333 ifmgd
= &sdata
->u
.mgd
;
336 /* Copy the addresses to the bss_conf list */
337 ifa
= idev
->ifa_list
;
339 if (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
)
340 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
345 bss_conf
->arp_addr_cnt
= c
;
347 /* Configure driver only if associated (which also implies it is up) */
348 if (ifmgd
->associated
)
349 ieee80211_bss_info_change_notify(sdata
,
350 BSS_CHANGED_ARP_FILTER
);
358 #if IS_ENABLED(CONFIG_IPV6)
359 static int ieee80211_ifa6_changed(struct notifier_block
*nb
,
360 unsigned long data
, void *arg
)
362 struct inet6_ifaddr
*ifa
= (struct inet6_ifaddr
*)arg
;
363 struct inet6_dev
*idev
= ifa
->idev
;
364 struct net_device
*ndev
= ifa
->idev
->dev
;
365 struct ieee80211_local
*local
=
366 container_of(nb
, struct ieee80211_local
, ifa6_notifier
);
367 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
368 struct ieee80211_sub_if_data
*sdata
;
370 /* Make sure it's our interface that got changed */
371 if (!wdev
|| wdev
->wiphy
!= local
->hw
.wiphy
)
374 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
377 * For now only support station mode. This is mostly because
378 * doing AP would have to handle AP_VLAN in some way ...
380 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
383 drv_ipv6_addr_change(local
, sdata
, idev
);
389 /* There isn't a lot of sense in it, but you can transmit anything you like */
390 static const struct ieee80211_txrx_stypes
391 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
392 [NL80211_IFTYPE_ADHOC
] = {
394 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
395 BIT(IEEE80211_STYPE_AUTH
>> 4) |
396 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
399 [NL80211_IFTYPE_STATION
] = {
401 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
402 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
404 [NL80211_IFTYPE_AP
] = {
406 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
407 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
408 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
409 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
410 BIT(IEEE80211_STYPE_AUTH
>> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
412 BIT(IEEE80211_STYPE_ACTION
>> 4),
414 [NL80211_IFTYPE_AP_VLAN
] = {
417 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
418 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
420 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
421 BIT(IEEE80211_STYPE_AUTH
>> 4) |
422 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
423 BIT(IEEE80211_STYPE_ACTION
>> 4),
425 [NL80211_IFTYPE_P2P_CLIENT
] = {
427 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
430 [NL80211_IFTYPE_P2P_GO
] = {
432 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
433 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
434 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
435 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
436 BIT(IEEE80211_STYPE_AUTH
>> 4) |
437 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
438 BIT(IEEE80211_STYPE_ACTION
>> 4),
440 [NL80211_IFTYPE_MESH_POINT
] = {
442 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
443 BIT(IEEE80211_STYPE_AUTH
>> 4) |
444 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
446 [NL80211_IFTYPE_P2P_DEVICE
] = {
448 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
449 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
453 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
454 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
455 IEEE80211_HT_AMPDU_PARM_DENSITY
,
457 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
458 IEEE80211_HT_CAP_MAX_AMSDU
|
459 IEEE80211_HT_CAP_SGI_20
|
460 IEEE80211_HT_CAP_SGI_40
),
462 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
463 0xff, 0xff, 0xff, 0xff, 0xff, },
467 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask
= {
469 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC
|
470 IEEE80211_VHT_CAP_SHORT_GI_80
|
471 IEEE80211_VHT_CAP_SHORT_GI_160
|
472 IEEE80211_VHT_CAP_RXSTBC_1
|
473 IEEE80211_VHT_CAP_RXSTBC_2
|
474 IEEE80211_VHT_CAP_RXSTBC_3
|
475 IEEE80211_VHT_CAP_RXSTBC_4
|
476 IEEE80211_VHT_CAP_TXSTBC
|
477 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
478 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
479 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN
|
480 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN
|
481 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
),
483 .rx_mcs_map
= cpu_to_le16(~0),
484 .tx_mcs_map
= cpu_to_le16(~0),
488 static const u8 extended_capabilities
[] = {
490 WLAN_EXT_CAPA8_OPMODE_NOTIF
,
493 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
494 const struct ieee80211_ops
*ops
)
496 struct ieee80211_local
*local
;
501 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
502 !ops
->add_interface
|| !ops
->remove_interface
||
503 !ops
->configure_filter
))
506 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
509 /* check all or no channel context operations exist */
510 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
511 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
512 !!ops
->unassign_vif_chanctx
;
513 if (WARN_ON(i
!= 0 && i
!= 5))
515 use_chanctx
= i
== 5;
517 /* Ensure 32-byte alignment of our private data and hw private data.
518 * We use the wiphy priv data for both our ieee80211_local and for
519 * the driver's private data
521 * In memory it'll be like this:
523 * +-------------------------+
525 * +-------------------------+
526 * | struct ieee80211_local |
527 * +-------------------------+
528 * | driver's private data |
529 * +-------------------------+
532 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
534 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
539 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
541 wiphy
->privid
= mac80211_wiphy_privid
;
543 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
544 WIPHY_FLAG_4ADDR_AP
|
545 WIPHY_FLAG_4ADDR_STATION
|
546 WIPHY_FLAG_REPORTS_OBSS
|
547 WIPHY_FLAG_OFFCHAN_TX
;
549 wiphy
->extended_capabilities
= extended_capabilities
;
550 wiphy
->extended_capabilities_mask
= extended_capabilities
;
551 wiphy
->extended_capabilities_len
= ARRAY_SIZE(extended_capabilities
);
553 if (ops
->remain_on_channel
)
554 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
556 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
557 NL80211_FEATURE_SAE
|
558 NL80211_FEATURE_HT_IBSS
|
559 NL80211_FEATURE_VIF_TXPOWER
|
560 NL80211_FEATURE_USERSPACE_MPM
;
563 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
564 NL80211_FEATURE_AP_SCAN
;
568 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
570 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
572 local
= wiphy_priv(wiphy
);
574 local
->hw
.wiphy
= wiphy
;
576 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
579 local
->use_chanctx
= use_chanctx
;
581 /* set up some defaults */
582 local
->hw
.queues
= 1;
583 local
->hw
.max_rates
= 1;
584 local
->hw
.max_report_rates
= 0;
585 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
586 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
587 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
588 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
589 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
590 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
591 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
592 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
593 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
594 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
595 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
596 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
597 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
598 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
599 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
601 INIT_LIST_HEAD(&local
->interfaces
);
603 __hw_addr_init(&local
->mc_list
);
605 mutex_init(&local
->iflist_mtx
);
606 mutex_init(&local
->mtx
);
608 mutex_init(&local
->key_mtx
);
609 spin_lock_init(&local
->filter_lock
);
610 spin_lock_init(&local
->rx_path_lock
);
611 spin_lock_init(&local
->queue_stop_reason_lock
);
613 INIT_LIST_HEAD(&local
->chanctx_list
);
614 mutex_init(&local
->chanctx_mtx
);
616 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
618 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
620 INIT_WORK(&local
->radar_detected_work
,
621 ieee80211_dfs_radar_detected_work
);
623 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
624 local
->smps_mode
= IEEE80211_SMPS_OFF
;
626 INIT_WORK(&local
->dynamic_ps_enable_work
,
627 ieee80211_dynamic_ps_enable_work
);
628 INIT_WORK(&local
->dynamic_ps_disable_work
,
629 ieee80211_dynamic_ps_disable_work
);
630 setup_timer(&local
->dynamic_ps_timer
,
631 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
633 INIT_WORK(&local
->sched_scan_stopped_work
,
634 ieee80211_sched_scan_stopped_work
);
636 spin_lock_init(&local
->ack_status_lock
);
637 idr_init(&local
->ack_status_frames
);
639 sta_info_init(local
);
641 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
642 skb_queue_head_init(&local
->pending
[i
]);
643 atomic_set(&local
->agg_queue_stop
[i
], 0);
645 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
646 (unsigned long)local
);
648 tasklet_init(&local
->tasklet
,
649 ieee80211_tasklet_handler
,
650 (unsigned long) local
);
652 skb_queue_head_init(&local
->skb_queue
);
653 skb_queue_head_init(&local
->skb_queue_unreliable
);
655 ieee80211_led_names(local
);
657 ieee80211_roc_setup(local
);
661 EXPORT_SYMBOL(ieee80211_alloc_hw
);
663 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
665 struct ieee80211_local
*local
= hw_to_local(hw
);
667 enum ieee80211_band band
;
668 int channels
, max_bitrates
;
669 bool supp_ht
, supp_vht
;
670 netdev_features_t feature_whitelist
;
671 struct cfg80211_chan_def dflt_chandef
= {};
672 static const u32 cipher_suites
[] = {
673 /* keep WEP first, it may be removed below */
674 WLAN_CIPHER_SUITE_WEP40
,
675 WLAN_CIPHER_SUITE_WEP104
,
676 WLAN_CIPHER_SUITE_TKIP
,
677 WLAN_CIPHER_SUITE_CCMP
,
679 /* keep last -- depends on hw flags! */
680 WLAN_CIPHER_SUITE_AES_CMAC
683 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
684 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
685 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
689 if (hw
->wiphy
->wowlan
&& (!local
->ops
->suspend
|| !local
->ops
->resume
))
693 if (!local
->use_chanctx
) {
694 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
695 const struct ieee80211_iface_combination
*comb
;
697 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
699 if (comb
->num_different_channels
> 1)
704 * WDS is currently prohibited when channel contexts are used
705 * because there's no clear definition of which channel WDS
706 * type interfaces use
708 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
711 /* DFS currently not supported with channel context drivers */
712 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
713 const struct ieee80211_iface_combination
*comb
;
715 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
717 if (comb
->radar_detect_widths
)
722 /* Only HW csum features are currently compatible with mac80211 */
723 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
725 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
728 if (hw
->max_report_rates
== 0)
729 hw
->max_report_rates
= hw
->max_rates
;
731 local
->rx_chains
= 1;
734 * generic code guarantees at least one band,
735 * set this very early because much code assumes
736 * that hw.conf.channel is assigned
742 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
743 struct ieee80211_supported_band
*sband
;
745 sband
= local
->hw
.wiphy
->bands
[band
];
749 if (!dflt_chandef
.chan
) {
750 cfg80211_chandef_create(&dflt_chandef
,
753 /* init channel we're on */
754 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
755 local
->hw
.conf
.chandef
= dflt_chandef
;
756 local
->_oper_chandef
= dflt_chandef
;
758 local
->monitor_chandef
= dflt_chandef
;
761 channels
+= sband
->n_channels
;
763 if (max_bitrates
< sband
->n_bitrates
)
764 max_bitrates
= sband
->n_bitrates
;
765 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
766 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
768 if (sband
->ht_cap
.ht_supported
)
770 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
773 /* TODO: consider VHT for RX chains, hopefully it's the same */
776 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
777 sizeof(void *) * channels
, GFP_KERNEL
);
778 if (!local
->int_scan_req
)
781 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
782 if (!local
->hw
.wiphy
->bands
[band
])
784 local
->int_scan_req
->rates
[band
] = (u32
) -1;
787 /* if low-level driver supports AP, we also support VLAN */
788 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
789 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
790 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
793 /* mac80211 always supports monitor */
794 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
795 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
797 /* mac80211 doesn't support more than one IBSS interface right now */
798 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
799 const struct ieee80211_iface_combination
*c
;
802 c
= &hw
->wiphy
->iface_combinations
[i
];
804 for (j
= 0; j
< c
->n_limits
; j
++)
805 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
806 c
->limits
[j
].max
> 1)
810 #ifndef CONFIG_MAC80211_MESH
811 /* mesh depends on Kconfig, but drivers should set it if they want */
812 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
815 /* if the underlying driver supports mesh, mac80211 will (at least)
816 * provide routing of mesh authentication frames to userspace */
817 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
818 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
820 /* mac80211 supports control port protocol changing */
821 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
823 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
824 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
825 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
826 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
828 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
829 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
830 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
833 * Calculate scan IE length -- we need this to alloc
834 * memory and to subtract from the driver limit. It
835 * includes the DS Params, (extended) supported rates, and HT
836 * information -- SSID is the driver's responsibility.
838 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
841 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
844 local
->scan_ies_len
+=
845 2 + sizeof(struct ieee80211_vht_cap
);
847 if (!local
->ops
->hw_scan
) {
848 /* For hw_scan, driver needs to set these up. */
849 local
->hw
.wiphy
->max_scan_ssids
= 4;
850 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
854 * If the driver supports any scan IEs, then assume the
855 * limit includes the IEs mac80211 will add, otherwise
856 * leave it at zero and let the driver sort it out; we
857 * still pass our IEs to the driver but userspace will
858 * not be allowed to in that case.
860 if (local
->hw
.wiphy
->max_scan_ie_len
)
861 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
863 /* Set up cipher suites unless driver already did */
864 if (!local
->hw
.wiphy
->cipher_suites
) {
865 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
866 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
867 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
868 local
->hw
.wiphy
->n_cipher_suites
--;
870 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
871 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
872 local
->hw
.wiphy
->cipher_suites
+= 2;
873 local
->hw
.wiphy
->n_cipher_suites
-= 2;
881 local
->hw
.wiphy
->cipher_suites
,
882 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
886 goto fail_wiphy_register
;
888 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
889 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
890 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
891 suite
== WLAN_CIPHER_SUITE_WEP104
)
895 local
->hw
.wiphy
->cipher_suites
= suites
;
896 local
->hw
.wiphy
->n_cipher_suites
= w
;
897 local
->wiphy_ciphers_allocated
= true;
901 if (!local
->ops
->remain_on_channel
)
902 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
904 if (local
->ops
->sched_scan_start
)
905 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
907 /* mac80211 based drivers don't support internal TDLS setup */
908 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
909 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
911 result
= wiphy_register(local
->hw
.wiphy
);
913 goto fail_wiphy_register
;
916 * We use the number of queues for feature tests (QoS, HT) internally
917 * so restrict them appropriately.
919 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
920 hw
->queues
= IEEE80211_MAX_QUEUES
;
923 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
924 if (!local
->workqueue
) {
930 * The hardware needs headroom for sending the frame,
931 * and we need some headroom for passing the frame to monitor
932 * interfaces, but never both at the same time.
934 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
935 IEEE80211_TX_STATUS_HEADROOM
);
937 debugfs_hw_add(local
);
940 * if the driver doesn't specify a max listen interval we
941 * use 5 which should be a safe default
943 if (local
->hw
.max_listen_interval
== 0)
944 local
->hw
.max_listen_interval
= 5;
946 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
948 local
->dynamic_ps_forced_timeout
= -1;
950 result
= ieee80211_wep_init(local
);
952 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
955 ieee80211_led_init(local
);
959 result
= ieee80211_init_rate_ctrl_alg(local
,
960 hw
->rate_control_algorithm
);
962 wiphy_debug(local
->hw
.wiphy
,
963 "Failed to initialize rate control algorithm\n");
967 /* add one default STA interface if supported */
968 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
969 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
970 NL80211_IFTYPE_STATION
, NULL
);
972 wiphy_warn(local
->hw
.wiphy
,
973 "Failed to add default virtual iface\n");
978 local
->network_latency_notifier
.notifier_call
=
979 ieee80211_max_network_latency
;
980 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
981 &local
->network_latency_notifier
);
988 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
989 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
994 #if IS_ENABLED(CONFIG_IPV6)
995 local
->ifa6_notifier
.notifier_call
= ieee80211_ifa6_changed
;
996 result
= register_inet6addr_notifier(&local
->ifa6_notifier
);
1003 #if IS_ENABLED(CONFIG_IPV6)
1006 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1009 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1011 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1012 &local
->network_latency_notifier
);
1016 ieee80211_led_exit(local
);
1017 ieee80211_remove_interfaces(local
);
1020 ieee80211_wep_free(local
);
1021 sta_info_stop(local
);
1022 destroy_workqueue(local
->workqueue
);
1024 wiphy_unregister(local
->hw
.wiphy
);
1025 fail_wiphy_register
:
1026 if (local
->wiphy_ciphers_allocated
)
1027 kfree(local
->hw
.wiphy
->cipher_suites
);
1028 kfree(local
->int_scan_req
);
1031 EXPORT_SYMBOL(ieee80211_register_hw
);
1033 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1035 struct ieee80211_local
*local
= hw_to_local(hw
);
1037 tasklet_kill(&local
->tx_pending_tasklet
);
1038 tasklet_kill(&local
->tasklet
);
1040 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1041 &local
->network_latency_notifier
);
1043 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1045 #if IS_ENABLED(CONFIG_IPV6)
1046 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1052 * At this point, interface list manipulations are fine
1053 * because the driver cannot be handing us frames any
1054 * more and the tasklet is killed.
1056 ieee80211_remove_interfaces(local
);
1060 cancel_work_sync(&local
->restart_work
);
1061 cancel_work_sync(&local
->reconfig_filter
);
1063 ieee80211_clear_tx_pending(local
);
1064 rate_control_deinitialize(local
);
1066 if (skb_queue_len(&local
->skb_queue
) ||
1067 skb_queue_len(&local
->skb_queue_unreliable
))
1068 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1069 skb_queue_purge(&local
->skb_queue
);
1070 skb_queue_purge(&local
->skb_queue_unreliable
);
1072 destroy_workqueue(local
->workqueue
);
1073 wiphy_unregister(local
->hw
.wiphy
);
1074 sta_info_stop(local
);
1075 ieee80211_wep_free(local
);
1076 ieee80211_led_exit(local
);
1077 kfree(local
->int_scan_req
);
1079 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1081 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1083 WARN_ONCE(1, "Have pending ack frames!\n");
1088 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1090 struct ieee80211_local
*local
= hw_to_local(hw
);
1092 mutex_destroy(&local
->iflist_mtx
);
1093 mutex_destroy(&local
->mtx
);
1095 if (local
->wiphy_ciphers_allocated
)
1096 kfree(local
->hw
.wiphy
->cipher_suites
);
1098 idr_for_each(&local
->ack_status_frames
,
1099 ieee80211_free_ack_frame
, NULL
);
1100 idr_destroy(&local
->ack_status_frames
);
1102 wiphy_free(local
->hw
.wiphy
);
1104 EXPORT_SYMBOL(ieee80211_free_hw
);
1106 static int __init
ieee80211_init(void)
1108 struct sk_buff
*skb
;
1111 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1112 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1113 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1115 ret
= rc80211_minstrel_init();
1119 ret
= rc80211_minstrel_ht_init();
1123 ret
= rc80211_pid_init();
1127 ret
= ieee80211_iface_init();
1135 rc80211_minstrel_ht_exit();
1137 rc80211_minstrel_exit();
1142 static void __exit
ieee80211_exit(void)
1145 rc80211_minstrel_ht_exit();
1146 rc80211_minstrel_exit();
1150 ieee80211_iface_exit();
1156 subsys_initcall(ieee80211_init
);
1157 module_exit(ieee80211_exit
);
1159 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1160 MODULE_LICENSE("GPL");