2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.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"
36 void ieee80211_configure_filter(struct ieee80211_local
*local
)
39 unsigned int changed_flags
;
40 unsigned int new_flags
= 0;
42 if (atomic_read(&local
->iff_allmultis
))
43 new_flags
|= FIF_ALLMULTI
;
45 if (local
->monitors
|| test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
))
47 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
49 if (local
->fif_probe_req
|| local
->probe_req_reg
)
50 new_flags
|= FIF_PROBE_REQ
;
52 if (local
->fif_fcsfail
)
53 new_flags
|= FIF_FCSFAIL
;
55 if (local
->fif_plcpfail
)
56 new_flags
|= FIF_PLCPFAIL
;
58 if (local
->fif_control
)
59 new_flags
|= FIF_CONTROL
;
61 if (local
->fif_other_bss
)
62 new_flags
|= FIF_OTHER_BSS
;
64 if (local
->fif_pspoll
)
65 new_flags
|= FIF_PSPOLL
;
67 spin_lock_bh(&local
->filter_lock
);
68 changed_flags
= local
->filter_flags
^ new_flags
;
70 mc
= drv_prepare_multicast(local
, &local
->mc_list
);
71 spin_unlock_bh(&local
->filter_lock
);
76 drv_configure_filter(local
, changed_flags
, &new_flags
, mc
);
78 WARN_ON(new_flags
& (1<<31));
80 local
->filter_flags
= new_flags
& ~(1<<31);
83 static void ieee80211_reconfig_filter(struct work_struct
*work
)
85 struct ieee80211_local
*local
=
86 container_of(work
, struct ieee80211_local
, reconfig_filter
);
88 ieee80211_configure_filter(local
);
91 static u32
ieee80211_hw_conf_chan(struct ieee80211_local
*local
)
93 struct ieee80211_sub_if_data
*sdata
;
94 struct cfg80211_chan_def chandef
= {};
99 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
101 if (local
->scan_chandef
.chan
) {
102 chandef
= local
->scan_chandef
;
103 } else if (local
->tmp_channel
) {
104 chandef
.chan
= local
->tmp_channel
;
105 chandef
.width
= NL80211_CHAN_WIDTH_20_NOHT
;
106 chandef
.center_freq1
= chandef
.chan
->center_freq
;
108 chandef
= local
->_oper_chandef
;
110 WARN(!cfg80211_chandef_valid(&chandef
),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef
.chan
->center_freq
, chandef
.width
,
113 chandef
.center_freq1
, chandef
.center_freq2
);
115 if (!cfg80211_chandef_identical(&chandef
, &local
->_oper_chandef
))
116 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
118 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
120 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
122 if (offchannel_flag
||
123 !cfg80211_chandef_identical(&local
->hw
.conf
.chandef
,
124 &local
->_oper_chandef
)) {
125 local
->hw
.conf
.chandef
= chandef
;
126 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
129 if (!conf_is_ht(&local
->hw
.conf
)) {
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
135 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
136 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
137 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
138 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
141 power
= ieee80211_chandef_max_power(&chandef
);
144 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
145 if (!rcu_access_pointer(sdata
->vif
.chanctx_conf
))
147 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
149 power
= min(power
, sdata
->vif
.bss_conf
.txpower
);
153 if (local
->hw
.conf
.power_level
!= power
) {
154 changed
|= IEEE80211_CONF_CHANGE_POWER
;
155 local
->hw
.conf
.power_level
= power
;
161 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
167 if (!local
->use_chanctx
)
168 changed
|= ieee80211_hw_conf_chan(local
);
170 changed
&= ~(IEEE80211_CONF_CHANGE_CHANNEL
|
171 IEEE80211_CONF_CHANGE_POWER
);
173 if (changed
&& local
->open_count
) {
174 ret
= drv_config(local
, changed
);
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
185 * FIXME: integrate rfkill with mac80211 and then add this
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
198 struct ieee80211_local
*local
= sdata
->local
;
200 if (!changed
|| sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
203 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
206 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
208 sdata
->vif
.bss_conf
.use_cts_prot
= false;
209 sdata
->vif
.bss_conf
.use_short_preamble
= false;
210 sdata
->vif
.bss_conf
.use_short_slot
= false;
211 return BSS_CHANGED_ERP_CTS_PROT
|
212 BSS_CHANGED_ERP_PREAMBLE
|
213 BSS_CHANGED_ERP_SLOT
;
216 static void ieee80211_tasklet_handler(unsigned long data
)
218 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
221 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
222 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
223 switch (skb
->pkt_type
) {
224 case IEEE80211_RX_MSG
:
225 /* Clear skb->pkt_type in order to not confuse kernel
228 ieee80211_rx(&local
->hw
, skb
);
230 case IEEE80211_TX_STATUS_MSG
:
232 ieee80211_tx_status(&local
->hw
, skb
);
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
243 static void ieee80211_restart_work(struct work_struct
*work
)
245 struct ieee80211_local
*local
=
246 container_of(work
, struct ieee80211_local
, restart_work
);
247 struct ieee80211_sub_if_data
*sdata
;
249 /* wait for scan work complete */
250 flush_workqueue(local
->workqueue
);
252 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
),
253 "%s called with hardware scan in progress\n", __func__
);
256 list_for_each_entry(sdata
, &local
->interfaces
, list
)
257 flush_delayed_work(&sdata
->dec_tailroom_needed_wk
);
258 ieee80211_scan_cancel(local
);
259 ieee80211_reconfig(local
);
263 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
265 struct ieee80211_local
*local
= hw_to_local(hw
);
267 trace_api_restart_hw(local
);
269 wiphy_info(hw
->wiphy
,
270 "Hardware restart was requested\n");
272 /* use this reason, ieee80211_reconfig will unblock it */
273 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
274 IEEE80211_QUEUE_STOP_REASON_SUSPEND
,
278 * Stop all Rx during the reconfig. We don't want state changes
279 * or driver callbacks while this is in progress.
281 local
->in_reconfig
= true;
284 queue_work(system_freezable_wq
, &local
->restart_work
);
286 EXPORT_SYMBOL(ieee80211_restart_hw
);
289 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
290 unsigned long data
, void *arg
)
292 struct in_ifaddr
*ifa
= arg
;
293 struct ieee80211_local
*local
=
294 container_of(nb
, struct ieee80211_local
,
296 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
297 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
298 struct in_device
*idev
;
299 struct ieee80211_sub_if_data
*sdata
;
300 struct ieee80211_bss_conf
*bss_conf
;
301 struct ieee80211_if_managed
*ifmgd
;
304 /* Make sure it's our interface that got changed */
308 if (wdev
->wiphy
!= local
->hw
.wiphy
)
311 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
312 bss_conf
= &sdata
->vif
.bss_conf
;
314 /* ARP filtering is only supported in managed mode */
315 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
318 idev
= __in_dev_get_rtnl(sdata
->dev
);
322 ifmgd
= &sdata
->u
.mgd
;
325 /* Copy the addresses to the bss_conf list */
326 ifa
= idev
->ifa_list
;
328 if (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
)
329 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
334 bss_conf
->arp_addr_cnt
= c
;
336 /* Configure driver only if associated (which also implies it is up) */
337 if (ifmgd
->associated
)
338 ieee80211_bss_info_change_notify(sdata
,
339 BSS_CHANGED_ARP_FILTER
);
347 #if IS_ENABLED(CONFIG_IPV6)
348 static int ieee80211_ifa6_changed(struct notifier_block
*nb
,
349 unsigned long data
, void *arg
)
351 struct inet6_ifaddr
*ifa
= (struct inet6_ifaddr
*)arg
;
352 struct inet6_dev
*idev
= ifa
->idev
;
353 struct net_device
*ndev
= ifa
->idev
->dev
;
354 struct ieee80211_local
*local
=
355 container_of(nb
, struct ieee80211_local
, ifa6_notifier
);
356 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
357 struct ieee80211_sub_if_data
*sdata
;
359 /* Make sure it's our interface that got changed */
360 if (!wdev
|| wdev
->wiphy
!= local
->hw
.wiphy
)
363 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
366 * For now only support station mode. This is mostly because
367 * doing AP would have to handle AP_VLAN in some way ...
369 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
372 drv_ipv6_addr_change(local
, sdata
, idev
);
378 /* There isn't a lot of sense in it, but you can transmit anything you like */
379 static const struct ieee80211_txrx_stypes
380 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
381 [NL80211_IFTYPE_ADHOC
] = {
383 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
384 BIT(IEEE80211_STYPE_AUTH
>> 4) |
385 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
386 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
388 [NL80211_IFTYPE_STATION
] = {
390 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
391 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
393 [NL80211_IFTYPE_AP
] = {
395 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
396 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
398 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
399 BIT(IEEE80211_STYPE_AUTH
>> 4) |
400 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
401 BIT(IEEE80211_STYPE_ACTION
>> 4),
403 [NL80211_IFTYPE_AP_VLAN
] = {
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_P2P_CLIENT
] = {
416 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
419 [NL80211_IFTYPE_P2P_GO
] = {
421 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
422 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
424 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
425 BIT(IEEE80211_STYPE_AUTH
>> 4) |
426 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
427 BIT(IEEE80211_STYPE_ACTION
>> 4),
429 [NL80211_IFTYPE_MESH_POINT
] = {
431 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
432 BIT(IEEE80211_STYPE_AUTH
>> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
435 [NL80211_IFTYPE_P2P_DEVICE
] = {
437 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
443 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
444 IEEE80211_HT_AMPDU_PARM_DENSITY
,
446 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
447 IEEE80211_HT_CAP_MAX_AMSDU
|
448 IEEE80211_HT_CAP_SGI_20
|
449 IEEE80211_HT_CAP_SGI_40
|
450 IEEE80211_HT_CAP_LDPC_CODING
|
451 IEEE80211_HT_CAP_40MHZ_INTOLERANT
),
453 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
454 0xff, 0xff, 0xff, 0xff, 0xff, },
458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask
= {
460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC
|
461 IEEE80211_VHT_CAP_SHORT_GI_80
|
462 IEEE80211_VHT_CAP_SHORT_GI_160
|
463 IEEE80211_VHT_CAP_RXSTBC_1
|
464 IEEE80211_VHT_CAP_RXSTBC_2
|
465 IEEE80211_VHT_CAP_RXSTBC_3
|
466 IEEE80211_VHT_CAP_RXSTBC_4
|
467 IEEE80211_VHT_CAP_TXSTBC
|
468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN
|
471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN
|
472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
),
474 .rx_mcs_map
= cpu_to_le16(~0),
475 .tx_mcs_map
= cpu_to_le16(~0),
479 struct ieee80211_hw
*ieee80211_alloc_hw_nm(size_t priv_data_len
,
480 const struct ieee80211_ops
*ops
,
481 const char *requested_name
)
483 struct ieee80211_local
*local
;
488 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
489 !ops
->add_interface
|| !ops
->remove_interface
||
490 !ops
->configure_filter
))
493 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
496 /* check all or no channel context operations exist */
497 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
498 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
499 !!ops
->unassign_vif_chanctx
;
500 if (WARN_ON(i
!= 0 && i
!= 5))
502 use_chanctx
= i
== 5;
504 /* Ensure 32-byte alignment of our private data and hw private data.
505 * We use the wiphy priv data for both our ieee80211_local and for
506 * the driver's private data
508 * In memory it'll be like this:
510 * +-------------------------+
512 * +-------------------------+
513 * | struct ieee80211_local |
514 * +-------------------------+
515 * | driver's private data |
516 * +-------------------------+
519 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
521 wiphy
= wiphy_new_nm(&mac80211_config_ops
, priv_size
, requested_name
);
526 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
528 wiphy
->privid
= mac80211_wiphy_privid
;
530 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
531 WIPHY_FLAG_4ADDR_AP
|
532 WIPHY_FLAG_4ADDR_STATION
|
533 WIPHY_FLAG_REPORTS_OBSS
|
534 WIPHY_FLAG_OFFCHAN_TX
;
536 if (ops
->remain_on_channel
)
537 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
539 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
540 NL80211_FEATURE_SAE
|
541 NL80211_FEATURE_HT_IBSS
|
542 NL80211_FEATURE_VIF_TXPOWER
|
543 NL80211_FEATURE_MAC_ON_CREATE
|
544 NL80211_FEATURE_USERSPACE_MPM
|
545 NL80211_FEATURE_FULL_AP_CLIENT_STATE
;
548 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
549 NL80211_FEATURE_AP_SCAN
;
553 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
555 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
557 local
= wiphy_priv(wiphy
);
559 if (sta_info_init(local
))
562 local
->hw
.wiphy
= wiphy
;
564 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
567 local
->use_chanctx
= use_chanctx
;
569 /* set up some defaults */
570 local
->hw
.queues
= 1;
571 local
->hw
.max_rates
= 1;
572 local
->hw
.max_report_rates
= 0;
573 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
574 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
575 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
576 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
577 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
578 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
579 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
580 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
581 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
582 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
583 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
584 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
585 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
586 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
587 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
589 local
->ext_capa
[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF
;
591 wiphy
->extended_capabilities
= local
->ext_capa
;
592 wiphy
->extended_capabilities_mask
= local
->ext_capa
;
593 wiphy
->extended_capabilities_len
=
594 ARRAY_SIZE(local
->ext_capa
);
596 INIT_LIST_HEAD(&local
->interfaces
);
598 __hw_addr_init(&local
->mc_list
);
600 mutex_init(&local
->iflist_mtx
);
601 mutex_init(&local
->mtx
);
603 mutex_init(&local
->key_mtx
);
604 spin_lock_init(&local
->filter_lock
);
605 spin_lock_init(&local
->rx_path_lock
);
606 spin_lock_init(&local
->queue_stop_reason_lock
);
608 INIT_LIST_HEAD(&local
->chanctx_list
);
609 mutex_init(&local
->chanctx_mtx
);
611 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
613 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
615 INIT_WORK(&local
->radar_detected_work
,
616 ieee80211_dfs_radar_detected_work
);
618 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
619 local
->smps_mode
= IEEE80211_SMPS_OFF
;
621 INIT_WORK(&local
->dynamic_ps_enable_work
,
622 ieee80211_dynamic_ps_enable_work
);
623 INIT_WORK(&local
->dynamic_ps_disable_work
,
624 ieee80211_dynamic_ps_disable_work
);
625 setup_timer(&local
->dynamic_ps_timer
,
626 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
628 INIT_WORK(&local
->sched_scan_stopped_work
,
629 ieee80211_sched_scan_stopped_work
);
631 INIT_WORK(&local
->tdls_chsw_work
, ieee80211_tdls_chsw_work
);
633 spin_lock_init(&local
->ack_status_lock
);
634 idr_init(&local
->ack_status_frames
);
636 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
637 skb_queue_head_init(&local
->pending
[i
]);
638 atomic_set(&local
->agg_queue_stop
[i
], 0);
640 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
641 (unsigned long)local
);
643 tasklet_init(&local
->tasklet
,
644 ieee80211_tasklet_handler
,
645 (unsigned long) local
);
647 skb_queue_head_init(&local
->skb_queue
);
648 skb_queue_head_init(&local
->skb_queue_unreliable
);
649 skb_queue_head_init(&local
->skb_queue_tdls_chsw
);
651 ieee80211_alloc_led_names(local
);
653 ieee80211_roc_setup(local
);
660 EXPORT_SYMBOL(ieee80211_alloc_hw_nm
);
662 static int ieee80211_init_cipher_suites(struct ieee80211_local
*local
)
664 bool have_wep
= !(IS_ERR(local
->wep_tx_tfm
) ||
665 IS_ERR(local
->wep_rx_tfm
));
666 bool have_mfp
= ieee80211_hw_check(&local
->hw
, MFP_CAPABLE
);
667 int n_suites
= 0, r
= 0, w
= 0;
669 static const u32 cipher_suites
[] = {
670 /* keep WEP first, it may be removed below */
671 WLAN_CIPHER_SUITE_WEP40
,
672 WLAN_CIPHER_SUITE_WEP104
,
673 WLAN_CIPHER_SUITE_TKIP
,
674 WLAN_CIPHER_SUITE_CCMP
,
675 WLAN_CIPHER_SUITE_CCMP_256
,
676 WLAN_CIPHER_SUITE_GCMP
,
677 WLAN_CIPHER_SUITE_GCMP_256
,
679 /* keep last -- depends on hw flags! */
680 WLAN_CIPHER_SUITE_AES_CMAC
,
681 WLAN_CIPHER_SUITE_BIP_CMAC_256
,
682 WLAN_CIPHER_SUITE_BIP_GMAC_128
,
683 WLAN_CIPHER_SUITE_BIP_GMAC_256
,
686 if (ieee80211_hw_check(&local
->hw
, SW_CRYPTO_CONTROL
) ||
687 local
->hw
.wiphy
->cipher_suites
) {
688 /* If the driver advertises, or doesn't support SW crypto,
689 * we only need to remove WEP if necessary.
694 /* well if it has _no_ ciphers ... fine */
695 if (!local
->hw
.wiphy
->n_cipher_suites
)
698 /* Driver provides cipher suites, but we need to exclude WEP */
699 suites
= kmemdup(local
->hw
.wiphy
->cipher_suites
,
700 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
705 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
706 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
708 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
709 suite
== WLAN_CIPHER_SUITE_WEP104
)
713 } else if (!local
->hw
.cipher_schemes
) {
714 /* If the driver doesn't have cipher schemes, there's nothing
715 * else to do other than assign the (software supported and
716 * perhaps offloaded) cipher suites.
718 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
719 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
722 local
->hw
.wiphy
->n_cipher_suites
-= 4;
725 local
->hw
.wiphy
->cipher_suites
+= 2;
726 local
->hw
.wiphy
->n_cipher_suites
-= 2;
729 /* not dynamically allocated, so just return */
732 const struct ieee80211_cipher_scheme
*cs
;
734 cs
= local
->hw
.cipher_schemes
;
736 /* Driver specifies cipher schemes only (but not cipher suites
737 * including the schemes)
739 * We start counting ciphers defined by schemes, TKIP, CCMP,
740 * CCMP-256, GCMP, and GCMP-256
742 n_suites
= local
->hw
.n_cipher_schemes
+ 5;
744 /* check if we have WEP40 and WEP104 */
748 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
754 suites
= kmalloc(sizeof(u32
) * n_suites
, GFP_KERNEL
);
758 suites
[w
++] = WLAN_CIPHER_SUITE_CCMP
;
759 suites
[w
++] = WLAN_CIPHER_SUITE_CCMP_256
;
760 suites
[w
++] = WLAN_CIPHER_SUITE_TKIP
;
761 suites
[w
++] = WLAN_CIPHER_SUITE_GCMP
;
762 suites
[w
++] = WLAN_CIPHER_SUITE_GCMP_256
;
765 suites
[w
++] = WLAN_CIPHER_SUITE_WEP40
;
766 suites
[w
++] = WLAN_CIPHER_SUITE_WEP104
;
770 suites
[w
++] = WLAN_CIPHER_SUITE_AES_CMAC
;
771 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_CMAC_256
;
772 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_GMAC_128
;
773 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_GMAC_256
;
776 for (r
= 0; r
< local
->hw
.n_cipher_schemes
; r
++) {
777 suites
[w
++] = cs
[r
].cipher
;
778 if (WARN_ON(cs
[r
].pn_len
> IEEE80211_MAX_PN_LEN
)) {
785 local
->hw
.wiphy
->cipher_suites
= suites
;
786 local
->hw
.wiphy
->n_cipher_suites
= w
;
787 local
->wiphy_ciphers_allocated
= true;
792 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
794 struct ieee80211_local
*local
= hw_to_local(hw
);
796 enum ieee80211_band band
;
797 int channels
, max_bitrates
;
798 bool supp_ht
, supp_vht
;
799 netdev_features_t feature_whitelist
;
800 struct cfg80211_chan_def dflt_chandef
= {};
802 if (ieee80211_hw_check(hw
, QUEUE_CONTROL
) &&
803 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
804 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
807 if ((hw
->wiphy
->features
& NL80211_FEATURE_TDLS_CHANNEL_SWITCH
) &&
808 (!local
->ops
->tdls_channel_switch
||
809 !local
->ops
->tdls_cancel_channel_switch
||
810 !local
->ops
->tdls_recv_channel_switch
))
814 if (hw
->wiphy
->wowlan
&& (!local
->ops
->suspend
|| !local
->ops
->resume
))
818 if (!local
->use_chanctx
) {
819 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
820 const struct ieee80211_iface_combination
*comb
;
822 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
824 if (comb
->num_different_channels
> 1)
829 * WDS is currently prohibited when channel contexts are used
830 * because there's no clear definition of which channel WDS
831 * type interfaces use
833 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
836 /* DFS is not supported with multi-channel combinations yet */
837 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
838 const struct ieee80211_iface_combination
*comb
;
840 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
842 if (comb
->radar_detect_widths
&&
843 comb
->num_different_channels
> 1)
848 /* Only HW csum features are currently compatible with mac80211 */
849 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
850 NETIF_F_HW_CSUM
| NETIF_F_SG
| NETIF_F_HIGHDMA
|
851 NETIF_F_GSO_SOFTWARE
;
852 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
855 if (hw
->max_report_rates
== 0)
856 hw
->max_report_rates
= hw
->max_rates
;
858 local
->rx_chains
= 1;
861 * generic code guarantees at least one band,
862 * set this very early because much code assumes
863 * that hw.conf.channel is assigned
869 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
870 struct ieee80211_supported_band
*sband
;
872 sband
= local
->hw
.wiphy
->bands
[band
];
876 if (!dflt_chandef
.chan
) {
877 cfg80211_chandef_create(&dflt_chandef
,
880 /* init channel we're on */
881 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
882 local
->hw
.conf
.chandef
= dflt_chandef
;
883 local
->_oper_chandef
= dflt_chandef
;
885 local
->monitor_chandef
= dflt_chandef
;
888 channels
+= sband
->n_channels
;
890 if (max_bitrates
< sband
->n_bitrates
)
891 max_bitrates
= sband
->n_bitrates
;
892 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
893 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
895 if (sband
->ht_cap
.ht_supported
)
897 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
900 /* TODO: consider VHT for RX chains, hopefully it's the same */
903 /* if low-level driver supports AP, we also support VLAN */
904 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
905 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
906 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
909 /* mac80211 always supports monitor */
910 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
911 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
913 /* mac80211 doesn't support more than one IBSS interface right now */
914 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
915 const struct ieee80211_iface_combination
*c
;
918 c
= &hw
->wiphy
->iface_combinations
[i
];
920 for (j
= 0; j
< c
->n_limits
; j
++)
921 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
922 c
->limits
[j
].max
> 1)
926 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
927 sizeof(void *) * channels
, GFP_KERNEL
);
928 if (!local
->int_scan_req
)
931 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
932 if (!local
->hw
.wiphy
->bands
[band
])
934 local
->int_scan_req
->rates
[band
] = (u32
) -1;
937 #ifndef CONFIG_MAC80211_MESH
938 /* mesh depends on Kconfig, but drivers should set it if they want */
939 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
942 /* if the underlying driver supports mesh, mac80211 will (at least)
943 * provide routing of mesh authentication frames to userspace */
944 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
945 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
947 /* mac80211 supports control port protocol changing */
948 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
950 if (ieee80211_hw_check(&local
->hw
, SIGNAL_DBM
)) {
951 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
952 } else if (ieee80211_hw_check(&local
->hw
, SIGNAL_UNSPEC
)) {
953 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
954 if (hw
->max_signal
<= 0) {
956 goto fail_wiphy_register
;
961 * Calculate scan IE length -- we need this to alloc
962 * memory and to subtract from the driver limit. It
963 * includes the DS Params, (extended) supported rates, and HT
964 * information -- SSID is the driver's responsibility.
966 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
969 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
972 local
->scan_ies_len
+=
973 2 + sizeof(struct ieee80211_vht_cap
);
975 if (!local
->ops
->hw_scan
) {
976 /* For hw_scan, driver needs to set these up. */
977 local
->hw
.wiphy
->max_scan_ssids
= 4;
978 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
982 * If the driver supports any scan IEs, then assume the
983 * limit includes the IEs mac80211 will add, otherwise
984 * leave it at zero and let the driver sort it out; we
985 * still pass our IEs to the driver but userspace will
986 * not be allowed to in that case.
988 if (local
->hw
.wiphy
->max_scan_ie_len
)
989 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
991 WARN_ON(!ieee80211_cs_list_valid(local
->hw
.cipher_schemes
,
992 local
->hw
.n_cipher_schemes
));
994 result
= ieee80211_init_cipher_suites(local
);
996 goto fail_wiphy_register
;
998 if (!local
->ops
->remain_on_channel
)
999 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
1001 /* mac80211 based drivers don't support internal TDLS setup */
1002 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
1003 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
1005 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1006 if (ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
))
1007 local
->ext_capa
[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING
;
1009 local
->hw
.wiphy
->max_num_csa_counters
= IEEE80211_MAX_CSA_COUNTERS_NUM
;
1011 result
= wiphy_register(local
->hw
.wiphy
);
1013 goto fail_wiphy_register
;
1016 * We use the number of queues for feature tests (QoS, HT) internally
1017 * so restrict them appropriately.
1019 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1020 hw
->queues
= IEEE80211_MAX_QUEUES
;
1023 alloc_ordered_workqueue("%s", 0, wiphy_name(local
->hw
.wiphy
));
1024 if (!local
->workqueue
) {
1026 goto fail_workqueue
;
1030 * The hardware needs headroom for sending the frame,
1031 * and we need some headroom for passing the frame to monitor
1032 * interfaces, but never both at the same time.
1034 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1035 IEEE80211_TX_STATUS_HEADROOM
);
1037 debugfs_hw_add(local
);
1040 * if the driver doesn't specify a max listen interval we
1041 * use 5 which should be a safe default
1043 if (local
->hw
.max_listen_interval
== 0)
1044 local
->hw
.max_listen_interval
= 5;
1046 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
1048 local
->dynamic_ps_forced_timeout
= -1;
1050 if (!local
->hw
.txq_ac_max_pending
)
1051 local
->hw
.txq_ac_max_pending
= 64;
1053 result
= ieee80211_wep_init(local
);
1055 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
1058 local
->hw
.conf
.flags
= IEEE80211_CONF_IDLE
;
1060 ieee80211_led_init(local
);
1064 result
= ieee80211_init_rate_ctrl_alg(local
,
1065 hw
->rate_control_algorithm
);
1067 wiphy_debug(local
->hw
.wiphy
,
1068 "Failed to initialize rate control algorithm\n");
1072 /* add one default STA interface if supported */
1073 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
) &&
1074 !ieee80211_hw_check(hw
, NO_AUTO_VIF
)) {
1075 result
= ieee80211_if_add(local
, "wlan%d", NET_NAME_ENUM
, NULL
,
1076 NL80211_IFTYPE_STATION
, NULL
);
1078 wiphy_warn(local
->hw
.wiphy
,
1079 "Failed to add default virtual iface\n");
1085 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
1086 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
1091 #if IS_ENABLED(CONFIG_IPV6)
1092 local
->ifa6_notifier
.notifier_call
= ieee80211_ifa6_changed
;
1093 result
= register_inet6addr_notifier(&local
->ifa6_notifier
);
1100 #if IS_ENABLED(CONFIG_IPV6)
1103 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1106 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1110 rate_control_deinitialize(local
);
1111 ieee80211_remove_interfaces(local
);
1114 ieee80211_led_exit(local
);
1115 ieee80211_wep_free(local
);
1116 destroy_workqueue(local
->workqueue
);
1118 wiphy_unregister(local
->hw
.wiphy
);
1119 fail_wiphy_register
:
1120 if (local
->wiphy_ciphers_allocated
)
1121 kfree(local
->hw
.wiphy
->cipher_suites
);
1122 kfree(local
->int_scan_req
);
1125 EXPORT_SYMBOL(ieee80211_register_hw
);
1127 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1129 struct ieee80211_local
*local
= hw_to_local(hw
);
1131 tasklet_kill(&local
->tx_pending_tasklet
);
1132 tasklet_kill(&local
->tasklet
);
1135 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1137 #if IS_ENABLED(CONFIG_IPV6)
1138 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1144 * At this point, interface list manipulations are fine
1145 * because the driver cannot be handing us frames any
1146 * more and the tasklet is killed.
1148 ieee80211_remove_interfaces(local
);
1152 cancel_delayed_work_sync(&local
->roc_work
);
1153 cancel_work_sync(&local
->restart_work
);
1154 cancel_work_sync(&local
->reconfig_filter
);
1155 cancel_work_sync(&local
->tdls_chsw_work
);
1156 flush_work(&local
->sched_scan_stopped_work
);
1158 ieee80211_clear_tx_pending(local
);
1159 rate_control_deinitialize(local
);
1161 if (skb_queue_len(&local
->skb_queue
) ||
1162 skb_queue_len(&local
->skb_queue_unreliable
))
1163 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1164 skb_queue_purge(&local
->skb_queue
);
1165 skb_queue_purge(&local
->skb_queue_unreliable
);
1166 skb_queue_purge(&local
->skb_queue_tdls_chsw
);
1168 destroy_workqueue(local
->workqueue
);
1169 wiphy_unregister(local
->hw
.wiphy
);
1170 ieee80211_wep_free(local
);
1171 ieee80211_led_exit(local
);
1172 kfree(local
->int_scan_req
);
1174 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1176 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1178 WARN_ONCE(1, "Have pending ack frames!\n");
1183 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1185 struct ieee80211_local
*local
= hw_to_local(hw
);
1187 mutex_destroy(&local
->iflist_mtx
);
1188 mutex_destroy(&local
->mtx
);
1190 if (local
->wiphy_ciphers_allocated
)
1191 kfree(local
->hw
.wiphy
->cipher_suites
);
1193 idr_for_each(&local
->ack_status_frames
,
1194 ieee80211_free_ack_frame
, NULL
);
1195 idr_destroy(&local
->ack_status_frames
);
1197 sta_info_stop(local
);
1199 ieee80211_free_led_names(local
);
1201 wiphy_free(local
->hw
.wiphy
);
1203 EXPORT_SYMBOL(ieee80211_free_hw
);
1205 static int __init
ieee80211_init(void)
1207 struct sk_buff
*skb
;
1210 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1211 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1212 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1214 ret
= rc80211_minstrel_init();
1218 ret
= rc80211_minstrel_ht_init();
1222 ret
= ieee80211_iface_init();
1228 rc80211_minstrel_ht_exit();
1230 rc80211_minstrel_exit();
1235 static void __exit
ieee80211_exit(void)
1237 rc80211_minstrel_ht_exit();
1238 rc80211_minstrel_exit();
1242 ieee80211_iface_exit();
1248 subsys_initcall(ieee80211_init
);
1249 module_exit(ieee80211_exit
);
1251 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1252 MODULE_LICENSE("GPL");