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 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
162 power
= min(power
, sdata
->vif
.bss_conf
.txpower
);
166 if (local
->hw
.conf
.power_level
!= power
) {
167 changed
|= IEEE80211_CONF_CHANGE_POWER
;
168 local
->hw
.conf
.power_level
= power
;
174 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
180 if (!local
->use_chanctx
)
181 changed
|= ieee80211_hw_conf_chan(local
);
183 changed
&= ~(IEEE80211_CONF_CHANGE_CHANNEL
|
184 IEEE80211_CONF_CHANGE_POWER
);
186 if (changed
&& local
->open_count
) {
187 ret
= drv_config(local
, changed
);
190 * HW reconfiguration should never fail, the driver has told
191 * us what it can support so it should live up to that promise.
194 * rfkill is not integrated with mac80211 and a
195 * configuration command can thus fail if hardware rfkill
198 * FIXME: integrate rfkill with mac80211 and then add this
208 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
211 struct ieee80211_local
*local
= sdata
->local
;
216 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
219 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
221 sdata
->vif
.bss_conf
.use_cts_prot
= false;
222 sdata
->vif
.bss_conf
.use_short_preamble
= false;
223 sdata
->vif
.bss_conf
.use_short_slot
= false;
224 return BSS_CHANGED_ERP_CTS_PROT
|
225 BSS_CHANGED_ERP_PREAMBLE
|
226 BSS_CHANGED_ERP_SLOT
;
229 static void ieee80211_tasklet_handler(unsigned long data
)
231 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
234 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
235 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
236 switch (skb
->pkt_type
) {
237 case IEEE80211_RX_MSG
:
238 /* Clear skb->pkt_type in order to not confuse kernel
241 ieee80211_rx(&local
->hw
, skb
);
243 case IEEE80211_TX_STATUS_MSG
:
245 ieee80211_tx_status(&local
->hw
, skb
);
248 WARN(1, "mac80211: Packet is of unknown type %d\n",
256 static void ieee80211_restart_work(struct work_struct
*work
)
258 struct ieee80211_local
*local
=
259 container_of(work
, struct ieee80211_local
, restart_work
);
260 struct ieee80211_sub_if_data
*sdata
;
262 /* wait for scan work complete */
263 flush_workqueue(local
->workqueue
);
265 mutex_lock(&local
->mtx
);
266 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
267 rcu_dereference_protected(local
->sched_scan_sdata
,
268 lockdep_is_held(&local
->mtx
)),
269 "%s called with hardware scan in progress\n", __func__
);
270 mutex_unlock(&local
->mtx
);
273 list_for_each_entry(sdata
, &local
->interfaces
, list
)
274 flush_delayed_work(&sdata
->dec_tailroom_needed_wk
);
275 ieee80211_scan_cancel(local
);
276 ieee80211_reconfig(local
);
280 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
282 struct ieee80211_local
*local
= hw_to_local(hw
);
284 trace_api_restart_hw(local
);
286 wiphy_info(hw
->wiphy
,
287 "Hardware restart was requested\n");
289 /* use this reason, ieee80211_reconfig will unblock it */
290 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
291 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
294 * Stop all Rx during the reconfig. We don't want state changes
295 * or driver callbacks while this is in progress.
297 local
->in_reconfig
= true;
300 schedule_work(&local
->restart_work
);
302 EXPORT_SYMBOL(ieee80211_restart_hw
);
305 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
306 unsigned long data
, void *arg
)
308 struct in_ifaddr
*ifa
= arg
;
309 struct ieee80211_local
*local
=
310 container_of(nb
, struct ieee80211_local
,
312 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
313 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
314 struct in_device
*idev
;
315 struct ieee80211_sub_if_data
*sdata
;
316 struct ieee80211_bss_conf
*bss_conf
;
317 struct ieee80211_if_managed
*ifmgd
;
320 /* Make sure it's our interface that got changed */
324 if (wdev
->wiphy
!= local
->hw
.wiphy
)
327 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
328 bss_conf
= &sdata
->vif
.bss_conf
;
330 /* ARP filtering is only supported in managed mode */
331 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
334 idev
= __in_dev_get_rtnl(sdata
->dev
);
338 ifmgd
= &sdata
->u
.mgd
;
339 mutex_lock(&ifmgd
->mtx
);
341 /* Copy the addresses to the bss_conf list */
342 ifa
= idev
->ifa_list
;
344 if (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
)
345 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
350 bss_conf
->arp_addr_cnt
= c
;
352 /* Configure driver only if associated (which also implies it is up) */
353 if (ifmgd
->associated
)
354 ieee80211_bss_info_change_notify(sdata
,
355 BSS_CHANGED_ARP_FILTER
);
357 mutex_unlock(&ifmgd
->mtx
);
363 #if IS_ENABLED(CONFIG_IPV6)
364 static int ieee80211_ifa6_changed(struct notifier_block
*nb
,
365 unsigned long data
, void *arg
)
367 struct inet6_ifaddr
*ifa
= (struct inet6_ifaddr
*)arg
;
368 struct inet6_dev
*idev
= ifa
->idev
;
369 struct net_device
*ndev
= ifa
->idev
->dev
;
370 struct ieee80211_local
*local
=
371 container_of(nb
, struct ieee80211_local
, ifa6_notifier
);
372 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
373 struct ieee80211_sub_if_data
*sdata
;
375 /* Make sure it's our interface that got changed */
376 if (!wdev
|| wdev
->wiphy
!= local
->hw
.wiphy
)
379 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
382 * For now only support station mode. This is mostly because
383 * doing AP would have to handle AP_VLAN in some way ...
385 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
388 drv_ipv6_addr_change(local
, sdata
, idev
);
394 /* There isn't a lot of sense in it, but you can transmit anything you like */
395 static const struct ieee80211_txrx_stypes
396 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
397 [NL80211_IFTYPE_ADHOC
] = {
399 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
400 BIT(IEEE80211_STYPE_AUTH
>> 4) |
401 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
402 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
404 [NL80211_IFTYPE_STATION
] = {
406 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
407 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
409 [NL80211_IFTYPE_AP
] = {
411 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
412 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
413 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
414 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
415 BIT(IEEE80211_STYPE_AUTH
>> 4) |
416 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
417 BIT(IEEE80211_STYPE_ACTION
>> 4),
419 [NL80211_IFTYPE_AP_VLAN
] = {
422 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
423 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
424 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
425 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
426 BIT(IEEE80211_STYPE_AUTH
>> 4) |
427 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
428 BIT(IEEE80211_STYPE_ACTION
>> 4),
430 [NL80211_IFTYPE_P2P_CLIENT
] = {
432 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
433 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
435 [NL80211_IFTYPE_P2P_GO
] = {
437 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
438 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
440 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
441 BIT(IEEE80211_STYPE_AUTH
>> 4) |
442 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
443 BIT(IEEE80211_STYPE_ACTION
>> 4),
445 [NL80211_IFTYPE_MESH_POINT
] = {
447 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
448 BIT(IEEE80211_STYPE_AUTH
>> 4) |
449 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
451 [NL80211_IFTYPE_P2P_DEVICE
] = {
453 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
454 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
458 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
459 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
460 IEEE80211_HT_AMPDU_PARM_DENSITY
,
462 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
463 IEEE80211_HT_CAP_MAX_AMSDU
|
464 IEEE80211_HT_CAP_SGI_20
|
465 IEEE80211_HT_CAP_SGI_40
),
467 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
468 0xff, 0xff, 0xff, 0xff, 0xff, },
472 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask
= {
474 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC
|
475 IEEE80211_VHT_CAP_SHORT_GI_80
|
476 IEEE80211_VHT_CAP_SHORT_GI_160
|
477 IEEE80211_VHT_CAP_RXSTBC_1
|
478 IEEE80211_VHT_CAP_RXSTBC_2
|
479 IEEE80211_VHT_CAP_RXSTBC_3
|
480 IEEE80211_VHT_CAP_RXSTBC_4
|
481 IEEE80211_VHT_CAP_TXSTBC
|
482 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
483 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
484 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN
|
485 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN
|
486 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
),
488 .rx_mcs_map
= cpu_to_le16(~0),
489 .tx_mcs_map
= cpu_to_le16(~0),
493 static const u8 extended_capabilities
[] = {
495 WLAN_EXT_CAPA8_OPMODE_NOTIF
,
498 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
499 const struct ieee80211_ops
*ops
)
501 struct ieee80211_local
*local
;
506 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
507 !ops
->add_interface
|| !ops
->remove_interface
||
508 !ops
->configure_filter
))
511 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
514 /* check all or no channel context operations exist */
515 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
516 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
517 !!ops
->unassign_vif_chanctx
;
518 if (WARN_ON(i
!= 0 && i
!= 5))
520 use_chanctx
= i
== 5;
522 /* Ensure 32-byte alignment of our private data and hw private data.
523 * We use the wiphy priv data for both our ieee80211_local and for
524 * the driver's private data
526 * In memory it'll be like this:
528 * +-------------------------+
530 * +-------------------------+
531 * | struct ieee80211_local |
532 * +-------------------------+
533 * | driver's private data |
534 * +-------------------------+
537 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
539 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
544 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
546 wiphy
->privid
= mac80211_wiphy_privid
;
548 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
549 WIPHY_FLAG_4ADDR_AP
|
550 WIPHY_FLAG_4ADDR_STATION
|
551 WIPHY_FLAG_REPORTS_OBSS
|
552 WIPHY_FLAG_OFFCHAN_TX
;
554 wiphy
->extended_capabilities
= extended_capabilities
;
555 wiphy
->extended_capabilities_mask
= extended_capabilities
;
556 wiphy
->extended_capabilities_len
= ARRAY_SIZE(extended_capabilities
);
558 if (ops
->remain_on_channel
)
559 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
561 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
562 NL80211_FEATURE_SAE
|
563 NL80211_FEATURE_HT_IBSS
|
564 NL80211_FEATURE_VIF_TXPOWER
|
565 NL80211_FEATURE_USERSPACE_MPM
;
568 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
569 NL80211_FEATURE_AP_SCAN
;
573 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
575 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
577 local
= wiphy_priv(wiphy
);
579 local
->hw
.wiphy
= wiphy
;
581 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
584 local
->use_chanctx
= use_chanctx
;
586 /* set up some defaults */
587 local
->hw
.queues
= 1;
588 local
->hw
.max_rates
= 1;
589 local
->hw
.max_report_rates
= 0;
590 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
591 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
592 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
593 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
594 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
595 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
596 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
597 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
598 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
599 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
600 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
601 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
602 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
603 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
604 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
606 INIT_LIST_HEAD(&local
->interfaces
);
608 __hw_addr_init(&local
->mc_list
);
610 mutex_init(&local
->iflist_mtx
);
611 mutex_init(&local
->mtx
);
613 mutex_init(&local
->key_mtx
);
614 spin_lock_init(&local
->filter_lock
);
615 spin_lock_init(&local
->rx_path_lock
);
616 spin_lock_init(&local
->queue_stop_reason_lock
);
618 INIT_LIST_HEAD(&local
->chanctx_list
);
619 mutex_init(&local
->chanctx_mtx
);
621 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
623 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
625 INIT_WORK(&local
->radar_detected_work
,
626 ieee80211_dfs_radar_detected_work
);
628 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
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
);
644 sta_info_init(local
);
646 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
647 skb_queue_head_init(&local
->pending
[i
]);
648 atomic_set(&local
->agg_queue_stop
[i
], 0);
650 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
651 (unsigned long)local
);
653 tasklet_init(&local
->tasklet
,
654 ieee80211_tasklet_handler
,
655 (unsigned long) local
);
657 skb_queue_head_init(&local
->skb_queue
);
658 skb_queue_head_init(&local
->skb_queue_unreliable
);
660 ieee80211_led_names(local
);
662 ieee80211_roc_setup(local
);
666 EXPORT_SYMBOL(ieee80211_alloc_hw
);
668 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
670 struct ieee80211_local
*local
= hw_to_local(hw
);
672 enum ieee80211_band band
;
673 int channels
, max_bitrates
;
674 bool supp_ht
, supp_vht
;
675 netdev_features_t feature_whitelist
;
676 struct cfg80211_chan_def dflt_chandef
= {};
677 static const u32 cipher_suites
[] = {
678 /* keep WEP first, it may be removed below */
679 WLAN_CIPHER_SUITE_WEP40
,
680 WLAN_CIPHER_SUITE_WEP104
,
681 WLAN_CIPHER_SUITE_TKIP
,
682 WLAN_CIPHER_SUITE_CCMP
,
684 /* keep last -- depends on hw flags! */
685 WLAN_CIPHER_SUITE_AES_CMAC
688 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
689 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
690 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
694 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
) &&
695 (!local
->ops
->suspend
|| !local
->ops
->resume
))
699 if (!local
->use_chanctx
) {
700 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
701 const struct ieee80211_iface_combination
*comb
;
703 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
705 if (comb
->num_different_channels
> 1)
710 * WDS is currently prohibited when channel contexts are used
711 * because there's no clear definition of which channel WDS
712 * type interfaces use
714 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
717 /* DFS currently not supported with channel context drivers */
718 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
719 const struct ieee80211_iface_combination
*comb
;
721 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
723 if (comb
->radar_detect_widths
)
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
;
737 local
->rx_chains
= 1;
740 * generic code guarantees at least one band,
741 * set this very early because much code assumes
742 * that hw.conf.channel is assigned
748 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
749 struct ieee80211_supported_band
*sband
;
751 sband
= local
->hw
.wiphy
->bands
[band
];
755 if (!dflt_chandef
.chan
) {
756 cfg80211_chandef_create(&dflt_chandef
,
759 /* init channel we're on */
760 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
761 local
->hw
.conf
.chandef
= dflt_chandef
;
762 local
->_oper_chandef
= dflt_chandef
;
764 local
->monitor_chandef
= dflt_chandef
;
767 channels
+= sband
->n_channels
;
769 if (max_bitrates
< sband
->n_bitrates
)
770 max_bitrates
= sband
->n_bitrates
;
771 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
772 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
774 if (sband
->ht_cap
.ht_supported
)
776 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
779 /* TODO: consider VHT for RX chains, hopefully it's the same */
782 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
783 sizeof(void *) * channels
, GFP_KERNEL
);
784 if (!local
->int_scan_req
)
787 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
788 if (!local
->hw
.wiphy
->bands
[band
])
790 local
->int_scan_req
->rates
[band
] = (u32
) -1;
793 /* if low-level driver supports AP, we also support VLAN */
794 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
795 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
796 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
799 /* mac80211 always supports monitor */
800 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
801 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
803 /* mac80211 doesn't support more than one IBSS interface right now */
804 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
805 const struct ieee80211_iface_combination
*c
;
808 c
= &hw
->wiphy
->iface_combinations
[i
];
810 for (j
= 0; j
< c
->n_limits
; j
++)
811 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
812 c
->limits
[j
].max
> 1)
816 #ifndef CONFIG_MAC80211_MESH
817 /* mesh depends on Kconfig, but drivers should set it if they want */
818 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
821 /* if the underlying driver supports mesh, mac80211 will (at least)
822 * provide routing of mesh authentication frames to userspace */
823 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
824 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
826 /* mac80211 supports control port protocol changing */
827 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
829 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
830 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
831 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
832 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
834 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
835 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
836 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
839 * Calculate scan IE length -- we need this to alloc
840 * memory and to subtract from the driver limit. It
841 * includes the DS Params, (extended) supported rates, and HT
842 * information -- SSID is the driver's responsibility.
844 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
847 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
850 local
->scan_ies_len
+=
851 2 + sizeof(struct ieee80211_vht_cap
);
853 if (!local
->ops
->hw_scan
) {
854 /* For hw_scan, driver needs to set these up. */
855 local
->hw
.wiphy
->max_scan_ssids
= 4;
856 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
860 * If the driver supports any scan IEs, then assume the
861 * limit includes the IEs mac80211 will add, otherwise
862 * leave it at zero and let the driver sort it out; we
863 * still pass our IEs to the driver but userspace will
864 * not be allowed to in that case.
866 if (local
->hw
.wiphy
->max_scan_ie_len
)
867 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
869 /* Set up cipher suites unless driver already did */
870 if (!local
->hw
.wiphy
->cipher_suites
) {
871 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
872 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
873 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
874 local
->hw
.wiphy
->n_cipher_suites
--;
876 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
877 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
878 local
->hw
.wiphy
->cipher_suites
+= 2;
879 local
->hw
.wiphy
->n_cipher_suites
-= 2;
887 local
->hw
.wiphy
->cipher_suites
,
888 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
892 goto fail_wiphy_register
;
894 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
895 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
896 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
897 suite
== WLAN_CIPHER_SUITE_WEP104
)
901 local
->hw
.wiphy
->cipher_suites
= suites
;
902 local
->hw
.wiphy
->n_cipher_suites
= w
;
903 local
->wiphy_ciphers_allocated
= true;
907 if (!local
->ops
->remain_on_channel
)
908 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
910 if (local
->ops
->sched_scan_start
)
911 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
913 /* mac80211 based drivers don't support internal TDLS setup */
914 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
915 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
917 result
= wiphy_register(local
->hw
.wiphy
);
919 goto fail_wiphy_register
;
922 * We use the number of queues for feature tests (QoS, HT) internally
923 * so restrict them appropriately.
925 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
926 hw
->queues
= IEEE80211_MAX_QUEUES
;
929 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
930 if (!local
->workqueue
) {
936 * The hardware needs headroom for sending the frame,
937 * and we need some headroom for passing the frame to monitor
938 * interfaces, but never both at the same time.
940 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
941 IEEE80211_TX_STATUS_HEADROOM
);
943 debugfs_hw_add(local
);
946 * if the driver doesn't specify a max listen interval we
947 * use 5 which should be a safe default
949 if (local
->hw
.max_listen_interval
== 0)
950 local
->hw
.max_listen_interval
= 5;
952 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
954 local
->dynamic_ps_forced_timeout
= -1;
956 result
= ieee80211_wep_init(local
);
958 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
961 ieee80211_led_init(local
);
965 result
= ieee80211_init_rate_ctrl_alg(local
,
966 hw
->rate_control_algorithm
);
968 wiphy_debug(local
->hw
.wiphy
,
969 "Failed to initialize rate control algorithm\n");
973 /* add one default STA interface if supported */
974 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
975 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
976 NL80211_IFTYPE_STATION
, NULL
);
978 wiphy_warn(local
->hw
.wiphy
,
979 "Failed to add default virtual iface\n");
984 local
->network_latency_notifier
.notifier_call
=
985 ieee80211_max_network_latency
;
986 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
987 &local
->network_latency_notifier
);
994 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
995 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
1000 #if IS_ENABLED(CONFIG_IPV6)
1001 local
->ifa6_notifier
.notifier_call
= ieee80211_ifa6_changed
;
1002 result
= register_inet6addr_notifier(&local
->ifa6_notifier
);
1009 #if IS_ENABLED(CONFIG_IPV6)
1012 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1015 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1017 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1018 &local
->network_latency_notifier
);
1022 ieee80211_led_exit(local
);
1023 ieee80211_remove_interfaces(local
);
1026 ieee80211_wep_free(local
);
1027 sta_info_stop(local
);
1028 destroy_workqueue(local
->workqueue
);
1030 wiphy_unregister(local
->hw
.wiphy
);
1031 fail_wiphy_register
:
1032 if (local
->wiphy_ciphers_allocated
)
1033 kfree(local
->hw
.wiphy
->cipher_suites
);
1034 kfree(local
->int_scan_req
);
1037 EXPORT_SYMBOL(ieee80211_register_hw
);
1039 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1041 struct ieee80211_local
*local
= hw_to_local(hw
);
1043 tasklet_kill(&local
->tx_pending_tasklet
);
1044 tasklet_kill(&local
->tasklet
);
1046 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1047 &local
->network_latency_notifier
);
1049 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1051 #if IS_ENABLED(CONFIG_IPV6)
1052 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1058 * At this point, interface list manipulations are fine
1059 * because the driver cannot be handing us frames any
1060 * more and the tasklet is killed.
1062 ieee80211_remove_interfaces(local
);
1066 cancel_work_sync(&local
->restart_work
);
1067 cancel_work_sync(&local
->reconfig_filter
);
1069 ieee80211_clear_tx_pending(local
);
1070 rate_control_deinitialize(local
);
1072 if (skb_queue_len(&local
->skb_queue
) ||
1073 skb_queue_len(&local
->skb_queue_unreliable
))
1074 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1075 skb_queue_purge(&local
->skb_queue
);
1076 skb_queue_purge(&local
->skb_queue_unreliable
);
1078 destroy_workqueue(local
->workqueue
);
1079 wiphy_unregister(local
->hw
.wiphy
);
1080 sta_info_stop(local
);
1081 ieee80211_wep_free(local
);
1082 ieee80211_led_exit(local
);
1083 kfree(local
->int_scan_req
);
1085 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1087 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1089 WARN_ONCE(1, "Have pending ack frames!\n");
1094 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1096 struct ieee80211_local
*local
= hw_to_local(hw
);
1098 mutex_destroy(&local
->iflist_mtx
);
1099 mutex_destroy(&local
->mtx
);
1101 if (local
->wiphy_ciphers_allocated
)
1102 kfree(local
->hw
.wiphy
->cipher_suites
);
1104 idr_for_each(&local
->ack_status_frames
,
1105 ieee80211_free_ack_frame
, NULL
);
1106 idr_destroy(&local
->ack_status_frames
);
1108 wiphy_free(local
->hw
.wiphy
);
1110 EXPORT_SYMBOL(ieee80211_free_hw
);
1112 static int __init
ieee80211_init(void)
1114 struct sk_buff
*skb
;
1117 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1118 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1119 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1121 ret
= rc80211_minstrel_init();
1125 ret
= rc80211_minstrel_ht_init();
1129 ret
= rc80211_pid_init();
1133 ret
= ieee80211_iface_init();
1141 rc80211_minstrel_ht_exit();
1143 rc80211_minstrel_exit();
1148 static void __exit
ieee80211_exit(void)
1151 rc80211_minstrel_ht_exit();
1152 rc80211_minstrel_exit();
1156 ieee80211_iface_exit();
1162 subsys_initcall(ieee80211_init
);
1163 module_exit(ieee80211_exit
);
1165 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1166 MODULE_LICENSE("GPL");