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/pm_qos.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
38 void ieee80211_configure_filter(struct ieee80211_local
*local
)
41 unsigned int changed_flags
;
42 unsigned int new_flags
= 0;
44 if (atomic_read(&local
->iff_allmultis
))
45 new_flags
|= FIF_ALLMULTI
;
47 if (local
->monitors
|| test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
48 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
))
49 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
51 if (local
->fif_probe_req
|| local
->probe_req_reg
)
52 new_flags
|= FIF_PROBE_REQ
;
54 if (local
->fif_fcsfail
)
55 new_flags
|= FIF_FCSFAIL
;
57 if (local
->fif_plcpfail
)
58 new_flags
|= FIF_PLCPFAIL
;
60 if (local
->fif_control
)
61 new_flags
|= FIF_CONTROL
;
63 if (local
->fif_other_bss
)
64 new_flags
|= FIF_OTHER_BSS
;
66 if (local
->fif_pspoll
)
67 new_flags
|= FIF_PSPOLL
;
69 spin_lock_bh(&local
->filter_lock
);
70 changed_flags
= local
->filter_flags
^ new_flags
;
72 mc
= drv_prepare_multicast(local
, &local
->mc_list
);
73 spin_unlock_bh(&local
->filter_lock
);
78 drv_configure_filter(local
, changed_flags
, &new_flags
, mc
);
80 WARN_ON(new_flags
& (1<<31));
82 local
->filter_flags
= new_flags
& ~(1<<31);
85 static void ieee80211_reconfig_filter(struct work_struct
*work
)
87 struct ieee80211_local
*local
=
88 container_of(work
, struct ieee80211_local
, reconfig_filter
);
90 ieee80211_configure_filter(local
);
93 static u32
ieee80211_hw_conf_chan(struct ieee80211_local
*local
)
95 struct ieee80211_sub_if_data
*sdata
;
96 struct cfg80211_chan_def chandef
= {};
101 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
103 if (local
->scan_chandef
.chan
) {
104 chandef
= local
->scan_chandef
;
105 } else if (local
->tmp_channel
) {
106 chandef
.chan
= local
->tmp_channel
;
107 chandef
.width
= NL80211_CHAN_WIDTH_20_NOHT
;
108 chandef
.center_freq1
= chandef
.chan
->center_freq
;
110 chandef
= local
->_oper_chandef
;
112 WARN(!cfg80211_chandef_valid(&chandef
),
113 "control:%d MHz width:%d center: %d/%d MHz",
114 chandef
.chan
->center_freq
, chandef
.width
,
115 chandef
.center_freq1
, chandef
.center_freq2
);
117 if (!cfg80211_chandef_identical(&chandef
, &local
->_oper_chandef
))
118 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
120 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
122 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
124 if (offchannel_flag
||
125 !cfg80211_chandef_identical(&local
->hw
.conf
.chandef
,
126 &local
->_oper_chandef
)) {
127 local
->hw
.conf
.chandef
= chandef
;
128 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
131 if (!conf_is_ht(&local
->hw
.conf
)) {
133 * mac80211.h documents that this is only valid
134 * when the channel is set to an HT type, and
135 * that otherwise STATIC is used.
137 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
138 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
139 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
140 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
143 power
= ieee80211_chandef_max_power(&chandef
);
146 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
147 if (!rcu_access_pointer(sdata
->vif
.chanctx_conf
))
149 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
151 power
= min(power
, sdata
->vif
.bss_conf
.txpower
);
155 if (local
->hw
.conf
.power_level
!= power
) {
156 changed
|= IEEE80211_CONF_CHANGE_POWER
;
157 local
->hw
.conf
.power_level
= power
;
163 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
169 if (!local
->use_chanctx
)
170 changed
|= ieee80211_hw_conf_chan(local
);
172 changed
&= ~(IEEE80211_CONF_CHANGE_CHANNEL
|
173 IEEE80211_CONF_CHANGE_POWER
);
175 if (changed
&& local
->open_count
) {
176 ret
= drv_config(local
, changed
);
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
187 * FIXME: integrate rfkill with mac80211 and then add this
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
200 struct ieee80211_local
*local
= sdata
->local
;
202 if (!changed
|| sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
205 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
208 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
210 sdata
->vif
.bss_conf
.use_cts_prot
= false;
211 sdata
->vif
.bss_conf
.use_short_preamble
= false;
212 sdata
->vif
.bss_conf
.use_short_slot
= false;
213 return BSS_CHANGED_ERP_CTS_PROT
|
214 BSS_CHANGED_ERP_PREAMBLE
|
215 BSS_CHANGED_ERP_SLOT
;
218 static void ieee80211_tasklet_handler(unsigned long data
)
220 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
223 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
224 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
225 switch (skb
->pkt_type
) {
226 case IEEE80211_RX_MSG
:
227 /* Clear skb->pkt_type in order to not confuse kernel
230 ieee80211_rx(&local
->hw
, skb
);
232 case IEEE80211_TX_STATUS_MSG
:
234 ieee80211_tx_status(&local
->hw
, skb
);
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
245 static void ieee80211_restart_work(struct work_struct
*work
)
247 struct ieee80211_local
*local
=
248 container_of(work
, struct ieee80211_local
, restart_work
);
250 /* wait for scan work complete */
251 flush_workqueue(local
->workqueue
);
253 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
),
254 "%s called with hardware scan in progress\n", __func__
);
257 ieee80211_scan_cancel(local
);
258 ieee80211_reconfig(local
);
262 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
264 struct ieee80211_local
*local
= hw_to_local(hw
);
266 trace_api_restart_hw(local
);
268 wiphy_info(hw
->wiphy
,
269 "Hardware restart was requested\n");
271 /* use this reason, ieee80211_reconfig will unblock it */
272 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
273 IEEE80211_QUEUE_STOP_REASON_SUSPEND
,
277 * Stop all Rx during the reconfig. We don't want state changes
278 * or driver callbacks while this is in progress.
280 local
->in_reconfig
= true;
283 schedule_work(&local
->restart_work
);
285 EXPORT_SYMBOL(ieee80211_restart_hw
);
288 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
289 unsigned long data
, void *arg
)
291 struct in_ifaddr
*ifa
= arg
;
292 struct ieee80211_local
*local
=
293 container_of(nb
, struct ieee80211_local
,
295 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
296 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
297 struct in_device
*idev
;
298 struct ieee80211_sub_if_data
*sdata
;
299 struct ieee80211_bss_conf
*bss_conf
;
300 struct ieee80211_if_managed
*ifmgd
;
303 /* Make sure it's our interface that got changed */
307 if (wdev
->wiphy
!= local
->hw
.wiphy
)
310 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
311 bss_conf
= &sdata
->vif
.bss_conf
;
313 /* ARP filtering is only supported in managed mode */
314 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
317 idev
= __in_dev_get_rtnl(sdata
->dev
);
321 ifmgd
= &sdata
->u
.mgd
;
324 /* Copy the addresses to the bss_conf list */
325 ifa
= idev
->ifa_list
;
327 if (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
)
328 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
333 bss_conf
->arp_addr_cnt
= c
;
335 /* Configure driver only if associated (which also implies it is up) */
336 if (ifmgd
->associated
)
337 ieee80211_bss_info_change_notify(sdata
,
338 BSS_CHANGED_ARP_FILTER
);
346 #if IS_ENABLED(CONFIG_IPV6)
347 static int ieee80211_ifa6_changed(struct notifier_block
*nb
,
348 unsigned long data
, void *arg
)
350 struct inet6_ifaddr
*ifa
= (struct inet6_ifaddr
*)arg
;
351 struct inet6_dev
*idev
= ifa
->idev
;
352 struct net_device
*ndev
= ifa
->idev
->dev
;
353 struct ieee80211_local
*local
=
354 container_of(nb
, struct ieee80211_local
, ifa6_notifier
);
355 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
356 struct ieee80211_sub_if_data
*sdata
;
358 /* Make sure it's our interface that got changed */
359 if (!wdev
|| wdev
->wiphy
!= local
->hw
.wiphy
)
362 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
365 * For now only support station mode. This is mostly because
366 * doing AP would have to handle AP_VLAN in some way ...
368 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
371 drv_ipv6_addr_change(local
, sdata
, idev
);
377 /* There isn't a lot of sense in it, but you can transmit anything you like */
378 static const struct ieee80211_txrx_stypes
379 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
380 [NL80211_IFTYPE_ADHOC
] = {
382 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
383 BIT(IEEE80211_STYPE_AUTH
>> 4) |
384 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
385 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
387 [NL80211_IFTYPE_STATION
] = {
389 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
390 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
392 [NL80211_IFTYPE_AP
] = {
394 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
395 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
396 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
397 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
398 BIT(IEEE80211_STYPE_AUTH
>> 4) |
399 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
400 BIT(IEEE80211_STYPE_ACTION
>> 4),
402 [NL80211_IFTYPE_AP_VLAN
] = {
405 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
406 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
407 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
408 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
409 BIT(IEEE80211_STYPE_AUTH
>> 4) |
410 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
411 BIT(IEEE80211_STYPE_ACTION
>> 4),
413 [NL80211_IFTYPE_P2P_CLIENT
] = {
415 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
416 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
418 [NL80211_IFTYPE_P2P_GO
] = {
420 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
421 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
423 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
424 BIT(IEEE80211_STYPE_AUTH
>> 4) |
425 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
426 BIT(IEEE80211_STYPE_ACTION
>> 4),
428 [NL80211_IFTYPE_MESH_POINT
] = {
430 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
431 BIT(IEEE80211_STYPE_AUTH
>> 4) |
432 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
434 [NL80211_IFTYPE_P2P_DEVICE
] = {
436 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
437 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
441 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
442 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
443 IEEE80211_HT_AMPDU_PARM_DENSITY
,
445 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
446 IEEE80211_HT_CAP_MAX_AMSDU
|
447 IEEE80211_HT_CAP_SGI_20
|
448 IEEE80211_HT_CAP_SGI_40
|
449 IEEE80211_HT_CAP_LDPC_CODING
|
450 IEEE80211_HT_CAP_40MHZ_INTOLERANT
),
452 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
453 0xff, 0xff, 0xff, 0xff, 0xff, },
457 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask
= {
459 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC
|
460 IEEE80211_VHT_CAP_SHORT_GI_80
|
461 IEEE80211_VHT_CAP_SHORT_GI_160
|
462 IEEE80211_VHT_CAP_RXSTBC_1
|
463 IEEE80211_VHT_CAP_RXSTBC_2
|
464 IEEE80211_VHT_CAP_RXSTBC_3
|
465 IEEE80211_VHT_CAP_RXSTBC_4
|
466 IEEE80211_VHT_CAP_TXSTBC
|
467 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
468 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
469 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN
|
470 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN
|
471 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
),
473 .rx_mcs_map
= cpu_to_le16(~0),
474 .tx_mcs_map
= cpu_to_le16(~0),
478 struct ieee80211_hw
*ieee80211_alloc_hw_nm(size_t priv_data_len
,
479 const struct ieee80211_ops
*ops
,
480 const char *requested_name
)
482 struct ieee80211_local
*local
;
487 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
488 !ops
->add_interface
|| !ops
->remove_interface
||
489 !ops
->configure_filter
))
492 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
495 /* check all or no channel context operations exist */
496 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
497 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
498 !!ops
->unassign_vif_chanctx
;
499 if (WARN_ON(i
!= 0 && i
!= 5))
501 use_chanctx
= i
== 5;
503 /* Ensure 32-byte alignment of our private data and hw private data.
504 * We use the wiphy priv data for both our ieee80211_local and for
505 * the driver's private data
507 * In memory it'll be like this:
509 * +-------------------------+
511 * +-------------------------+
512 * | struct ieee80211_local |
513 * +-------------------------+
514 * | driver's private data |
515 * +-------------------------+
518 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
520 wiphy
= wiphy_new_nm(&mac80211_config_ops
, priv_size
, requested_name
);
525 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
527 wiphy
->privid
= mac80211_wiphy_privid
;
529 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
530 WIPHY_FLAG_4ADDR_AP
|
531 WIPHY_FLAG_4ADDR_STATION
|
532 WIPHY_FLAG_REPORTS_OBSS
|
533 WIPHY_FLAG_OFFCHAN_TX
;
535 if (ops
->remain_on_channel
)
536 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
538 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
539 NL80211_FEATURE_SAE
|
540 NL80211_FEATURE_HT_IBSS
|
541 NL80211_FEATURE_VIF_TXPOWER
|
542 NL80211_FEATURE_MAC_ON_CREATE
|
543 NL80211_FEATURE_USERSPACE_MPM
;
546 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
547 NL80211_FEATURE_AP_SCAN
;
551 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
553 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
555 local
= wiphy_priv(wiphy
);
557 if (sta_info_init(local
))
560 local
->hw
.wiphy
= wiphy
;
562 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
565 local
->use_chanctx
= use_chanctx
;
567 /* set up some defaults */
568 local
->hw
.queues
= 1;
569 local
->hw
.max_rates
= 1;
570 local
->hw
.max_report_rates
= 0;
571 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
572 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
573 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
574 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
575 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
576 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
577 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
578 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
579 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
580 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
581 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
582 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
583 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
584 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
585 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
587 local
->ext_capa
[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF
;
589 wiphy
->extended_capabilities
= local
->ext_capa
;
590 wiphy
->extended_capabilities_mask
= local
->ext_capa
;
591 wiphy
->extended_capabilities_len
=
592 ARRAY_SIZE(local
->ext_capa
);
594 INIT_LIST_HEAD(&local
->interfaces
);
596 __hw_addr_init(&local
->mc_list
);
598 mutex_init(&local
->iflist_mtx
);
599 mutex_init(&local
->mtx
);
601 mutex_init(&local
->key_mtx
);
602 spin_lock_init(&local
->filter_lock
);
603 spin_lock_init(&local
->rx_path_lock
);
604 spin_lock_init(&local
->queue_stop_reason_lock
);
606 INIT_LIST_HEAD(&local
->chanctx_list
);
607 mutex_init(&local
->chanctx_mtx
);
609 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
611 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
613 INIT_WORK(&local
->radar_detected_work
,
614 ieee80211_dfs_radar_detected_work
);
616 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
617 local
->smps_mode
= IEEE80211_SMPS_OFF
;
619 INIT_WORK(&local
->dynamic_ps_enable_work
,
620 ieee80211_dynamic_ps_enable_work
);
621 INIT_WORK(&local
->dynamic_ps_disable_work
,
622 ieee80211_dynamic_ps_disable_work
);
623 setup_timer(&local
->dynamic_ps_timer
,
624 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
626 INIT_WORK(&local
->sched_scan_stopped_work
,
627 ieee80211_sched_scan_stopped_work
);
629 spin_lock_init(&local
->ack_status_lock
);
630 idr_init(&local
->ack_status_frames
);
632 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
633 skb_queue_head_init(&local
->pending
[i
]);
634 atomic_set(&local
->agg_queue_stop
[i
], 0);
636 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
637 (unsigned long)local
);
639 tasklet_init(&local
->tasklet
,
640 ieee80211_tasklet_handler
,
641 (unsigned long) local
);
643 skb_queue_head_init(&local
->skb_queue
);
644 skb_queue_head_init(&local
->skb_queue_unreliable
);
646 ieee80211_alloc_led_names(local
);
648 ieee80211_roc_setup(local
);
655 EXPORT_SYMBOL(ieee80211_alloc_hw_nm
);
657 static int ieee80211_init_cipher_suites(struct ieee80211_local
*local
)
659 bool have_wep
= !(IS_ERR(local
->wep_tx_tfm
) ||
660 IS_ERR(local
->wep_rx_tfm
));
661 bool have_mfp
= local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
;
662 int n_suites
= 0, r
= 0, w
= 0;
664 static const u32 cipher_suites
[] = {
665 /* keep WEP first, it may be removed below */
666 WLAN_CIPHER_SUITE_WEP40
,
667 WLAN_CIPHER_SUITE_WEP104
,
668 WLAN_CIPHER_SUITE_TKIP
,
669 WLAN_CIPHER_SUITE_CCMP
,
670 WLAN_CIPHER_SUITE_CCMP_256
,
671 WLAN_CIPHER_SUITE_GCMP
,
672 WLAN_CIPHER_SUITE_GCMP_256
,
674 /* keep last -- depends on hw flags! */
675 WLAN_CIPHER_SUITE_AES_CMAC
,
676 WLAN_CIPHER_SUITE_BIP_CMAC_256
,
677 WLAN_CIPHER_SUITE_BIP_GMAC_128
,
678 WLAN_CIPHER_SUITE_BIP_GMAC_256
,
681 if (local
->hw
.flags
& IEEE80211_HW_SW_CRYPTO_CONTROL
||
682 local
->hw
.wiphy
->cipher_suites
) {
683 /* If the driver advertises, or doesn't support SW crypto,
684 * we only need to remove WEP if necessary.
689 /* well if it has _no_ ciphers ... fine */
690 if (!local
->hw
.wiphy
->n_cipher_suites
)
693 /* Driver provides cipher suites, but we need to exclude WEP */
694 suites
= kmemdup(local
->hw
.wiphy
->cipher_suites
,
695 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
700 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
701 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
703 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
704 suite
== WLAN_CIPHER_SUITE_WEP104
)
708 } else if (!local
->hw
.cipher_schemes
) {
709 /* If the driver doesn't have cipher schemes, there's nothing
710 * else to do other than assign the (software supported and
711 * perhaps offloaded) cipher suites.
713 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
714 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
717 local
->hw
.wiphy
->n_cipher_suites
-= 4;
720 local
->hw
.wiphy
->cipher_suites
+= 2;
721 local
->hw
.wiphy
->n_cipher_suites
-= 2;
724 /* not dynamically allocated, so just return */
727 const struct ieee80211_cipher_scheme
*cs
;
729 cs
= local
->hw
.cipher_schemes
;
731 /* Driver specifies cipher schemes only (but not cipher suites
732 * including the schemes)
734 * We start counting ciphers defined by schemes, TKIP, CCMP,
735 * CCMP-256, GCMP, and GCMP-256
737 n_suites
= local
->hw
.n_cipher_schemes
+ 5;
739 /* check if we have WEP40 and WEP104 */
743 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
749 suites
= kmalloc(sizeof(u32
) * n_suites
, GFP_KERNEL
);
753 suites
[w
++] = WLAN_CIPHER_SUITE_CCMP
;
754 suites
[w
++] = WLAN_CIPHER_SUITE_CCMP_256
;
755 suites
[w
++] = WLAN_CIPHER_SUITE_TKIP
;
756 suites
[w
++] = WLAN_CIPHER_SUITE_GCMP
;
757 suites
[w
++] = WLAN_CIPHER_SUITE_GCMP_256
;
760 suites
[w
++] = WLAN_CIPHER_SUITE_WEP40
;
761 suites
[w
++] = WLAN_CIPHER_SUITE_WEP104
;
765 suites
[w
++] = WLAN_CIPHER_SUITE_AES_CMAC
;
766 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_CMAC_256
;
767 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_GMAC_128
;
768 suites
[w
++] = WLAN_CIPHER_SUITE_BIP_GMAC_256
;
771 for (r
= 0; r
< local
->hw
.n_cipher_schemes
; r
++) {
772 suites
[w
++] = cs
[r
].cipher
;
773 if (WARN_ON(cs
[r
].pn_len
> IEEE80211_MAX_PN_LEN
))
778 local
->hw
.wiphy
->cipher_suites
= suites
;
779 local
->hw
.wiphy
->n_cipher_suites
= w
;
780 local
->wiphy_ciphers_allocated
= true;
785 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
787 struct ieee80211_local
*local
= hw_to_local(hw
);
789 enum ieee80211_band band
;
790 int channels
, max_bitrates
;
791 bool supp_ht
, supp_vht
;
792 netdev_features_t feature_whitelist
;
793 struct cfg80211_chan_def dflt_chandef
= {};
795 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
796 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
797 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
800 if ((hw
->wiphy
->features
& NL80211_FEATURE_TDLS_CHANNEL_SWITCH
) &&
801 (!local
->ops
->tdls_channel_switch
||
802 !local
->ops
->tdls_cancel_channel_switch
||
803 !local
->ops
->tdls_recv_channel_switch
))
807 if (hw
->wiphy
->wowlan
&& (!local
->ops
->suspend
|| !local
->ops
->resume
))
811 if (!local
->use_chanctx
) {
812 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
813 const struct ieee80211_iface_combination
*comb
;
815 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
817 if (comb
->num_different_channels
> 1)
822 * WDS is currently prohibited when channel contexts are used
823 * because there's no clear definition of which channel WDS
824 * type interfaces use
826 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
829 /* DFS is not supported with multi-channel combinations yet */
830 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
831 const struct ieee80211_iface_combination
*comb
;
833 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
835 if (comb
->radar_detect_widths
&&
836 comb
->num_different_channels
> 1)
841 /* Only HW csum features are currently compatible with mac80211 */
842 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
843 NETIF_F_HW_CSUM
| NETIF_F_SG
| NETIF_F_HIGHDMA
|
844 NETIF_F_GSO_SOFTWARE
;
845 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
848 if (hw
->max_report_rates
== 0)
849 hw
->max_report_rates
= hw
->max_rates
;
851 local
->rx_chains
= 1;
854 * generic code guarantees at least one band,
855 * set this very early because much code assumes
856 * that hw.conf.channel is assigned
862 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
863 struct ieee80211_supported_band
*sband
;
865 sband
= local
->hw
.wiphy
->bands
[band
];
869 if (!dflt_chandef
.chan
) {
870 cfg80211_chandef_create(&dflt_chandef
,
873 /* init channel we're on */
874 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
875 local
->hw
.conf
.chandef
= dflt_chandef
;
876 local
->_oper_chandef
= dflt_chandef
;
878 local
->monitor_chandef
= dflt_chandef
;
881 channels
+= sband
->n_channels
;
883 if (max_bitrates
< sband
->n_bitrates
)
884 max_bitrates
= sband
->n_bitrates
;
885 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
886 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
888 if (sband
->ht_cap
.ht_supported
)
890 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
893 /* TODO: consider VHT for RX chains, hopefully it's the same */
896 /* if low-level driver supports AP, we also support VLAN */
897 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
898 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
899 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
902 /* mac80211 always supports monitor */
903 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
904 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
906 /* mac80211 doesn't support more than one IBSS interface right now */
907 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
908 const struct ieee80211_iface_combination
*c
;
911 c
= &hw
->wiphy
->iface_combinations
[i
];
913 for (j
= 0; j
< c
->n_limits
; j
++)
914 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
915 c
->limits
[j
].max
> 1)
919 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
920 sizeof(void *) * channels
, GFP_KERNEL
);
921 if (!local
->int_scan_req
)
924 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
925 if (!local
->hw
.wiphy
->bands
[band
])
927 local
->int_scan_req
->rates
[band
] = (u32
) -1;
930 #ifndef CONFIG_MAC80211_MESH
931 /* mesh depends on Kconfig, but drivers should set it if they want */
932 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
935 /* if the underlying driver supports mesh, mac80211 will (at least)
936 * provide routing of mesh authentication frames to userspace */
937 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
938 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
940 /* mac80211 supports control port protocol changing */
941 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
943 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
) {
944 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
945 } else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
) {
946 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
947 if (hw
->max_signal
<= 0) {
949 goto fail_wiphy_register
;
954 * Calculate scan IE length -- we need this to alloc
955 * memory and to subtract from the driver limit. It
956 * includes the DS Params, (extended) supported rates, and HT
957 * information -- SSID is the driver's responsibility.
959 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
962 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
965 local
->scan_ies_len
+=
966 2 + sizeof(struct ieee80211_vht_cap
);
968 if (!local
->ops
->hw_scan
) {
969 /* For hw_scan, driver needs to set these up. */
970 local
->hw
.wiphy
->max_scan_ssids
= 4;
971 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
975 * If the driver supports any scan IEs, then assume the
976 * limit includes the IEs mac80211 will add, otherwise
977 * leave it at zero and let the driver sort it out; we
978 * still pass our IEs to the driver but userspace will
979 * not be allowed to in that case.
981 if (local
->hw
.wiphy
->max_scan_ie_len
)
982 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
984 WARN_ON(!ieee80211_cs_list_valid(local
->hw
.cipher_schemes
,
985 local
->hw
.n_cipher_schemes
));
987 result
= ieee80211_init_cipher_suites(local
);
989 goto fail_wiphy_register
;
991 if (!local
->ops
->remain_on_channel
)
992 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
994 /* mac80211 based drivers don't support internal TDLS setup */
995 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
996 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
998 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
999 if (local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)
1000 local
->ext_capa
[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING
;
1002 local
->hw
.wiphy
->max_num_csa_counters
= IEEE80211_MAX_CSA_COUNTERS_NUM
;
1004 result
= wiphy_register(local
->hw
.wiphy
);
1006 goto fail_wiphy_register
;
1009 * We use the number of queues for feature tests (QoS, HT) internally
1010 * so restrict them appropriately.
1012 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1013 hw
->queues
= IEEE80211_MAX_QUEUES
;
1016 alloc_ordered_workqueue("%s", 0, wiphy_name(local
->hw
.wiphy
));
1017 if (!local
->workqueue
) {
1019 goto fail_workqueue
;
1023 * The hardware needs headroom for sending the frame,
1024 * and we need some headroom for passing the frame to monitor
1025 * interfaces, but never both at the same time.
1027 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1028 IEEE80211_TX_STATUS_HEADROOM
);
1030 debugfs_hw_add(local
);
1033 * if the driver doesn't specify a max listen interval we
1034 * use 5 which should be a safe default
1036 if (local
->hw
.max_listen_interval
== 0)
1037 local
->hw
.max_listen_interval
= 5;
1039 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
1041 local
->dynamic_ps_forced_timeout
= -1;
1043 if (!local
->hw
.txq_ac_max_pending
)
1044 local
->hw
.txq_ac_max_pending
= 64;
1046 result
= ieee80211_wep_init(local
);
1048 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
1051 local
->hw
.conf
.flags
= IEEE80211_CONF_IDLE
;
1053 ieee80211_led_init(local
);
1057 result
= ieee80211_init_rate_ctrl_alg(local
,
1058 hw
->rate_control_algorithm
);
1060 wiphy_debug(local
->hw
.wiphy
,
1061 "Failed to initialize rate control algorithm\n");
1065 /* add one default STA interface if supported */
1066 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
) &&
1067 !(hw
->flags
& IEEE80211_HW_NO_AUTO_VIF
)) {
1068 result
= ieee80211_if_add(local
, "wlan%d", NET_NAME_ENUM
, NULL
,
1069 NL80211_IFTYPE_STATION
, NULL
);
1071 wiphy_warn(local
->hw
.wiphy
,
1072 "Failed to add default virtual iface\n");
1077 local
->network_latency_notifier
.notifier_call
=
1078 ieee80211_max_network_latency
;
1079 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
1080 &local
->network_latency_notifier
);
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)
1108 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1109 &local
->network_latency_notifier
);
1113 rate_control_deinitialize(local
);
1114 ieee80211_remove_interfaces(local
);
1117 ieee80211_led_exit(local
);
1118 ieee80211_wep_free(local
);
1119 destroy_workqueue(local
->workqueue
);
1121 wiphy_unregister(local
->hw
.wiphy
);
1122 fail_wiphy_register
:
1123 if (local
->wiphy_ciphers_allocated
)
1124 kfree(local
->hw
.wiphy
->cipher_suites
);
1125 kfree(local
->int_scan_req
);
1128 EXPORT_SYMBOL(ieee80211_register_hw
);
1130 void ieee80211_napi_add(struct ieee80211_hw
*hw
, struct napi_struct
*napi
,
1131 struct net_device
*napi_dev
,
1132 int (*poll
)(struct napi_struct
*, int),
1135 struct ieee80211_local
*local
= hw_to_local(hw
);
1137 netif_napi_add(napi_dev
, napi
, poll
, weight
);
1140 EXPORT_SYMBOL_GPL(ieee80211_napi_add
);
1142 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1144 struct ieee80211_local
*local
= hw_to_local(hw
);
1146 tasklet_kill(&local
->tx_pending_tasklet
);
1147 tasklet_kill(&local
->tasklet
);
1149 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1150 &local
->network_latency_notifier
);
1152 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1154 #if IS_ENABLED(CONFIG_IPV6)
1155 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1161 * At this point, interface list manipulations are fine
1162 * because the driver cannot be handing us frames any
1163 * more and the tasklet is killed.
1165 ieee80211_remove_interfaces(local
);
1169 cancel_work_sync(&local
->restart_work
);
1170 cancel_work_sync(&local
->reconfig_filter
);
1171 flush_work(&local
->sched_scan_stopped_work
);
1173 ieee80211_clear_tx_pending(local
);
1174 rate_control_deinitialize(local
);
1176 if (skb_queue_len(&local
->skb_queue
) ||
1177 skb_queue_len(&local
->skb_queue_unreliable
))
1178 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1179 skb_queue_purge(&local
->skb_queue
);
1180 skb_queue_purge(&local
->skb_queue_unreliable
);
1182 destroy_workqueue(local
->workqueue
);
1183 wiphy_unregister(local
->hw
.wiphy
);
1184 ieee80211_wep_free(local
);
1185 ieee80211_led_exit(local
);
1186 kfree(local
->int_scan_req
);
1188 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1190 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1192 WARN_ONCE(1, "Have pending ack frames!\n");
1197 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1199 struct ieee80211_local
*local
= hw_to_local(hw
);
1201 mutex_destroy(&local
->iflist_mtx
);
1202 mutex_destroy(&local
->mtx
);
1204 if (local
->wiphy_ciphers_allocated
)
1205 kfree(local
->hw
.wiphy
->cipher_suites
);
1207 idr_for_each(&local
->ack_status_frames
,
1208 ieee80211_free_ack_frame
, NULL
);
1209 idr_destroy(&local
->ack_status_frames
);
1211 sta_info_stop(local
);
1213 ieee80211_free_led_names(local
);
1215 wiphy_free(local
->hw
.wiphy
);
1217 EXPORT_SYMBOL(ieee80211_free_hw
);
1219 static int __init
ieee80211_init(void)
1221 struct sk_buff
*skb
;
1224 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1225 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1226 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1228 ret
= rc80211_minstrel_init();
1232 ret
= rc80211_minstrel_ht_init();
1236 ret
= ieee80211_iface_init();
1242 rc80211_minstrel_ht_exit();
1244 rc80211_minstrel_exit();
1249 static void __exit
ieee80211_exit(void)
1251 rc80211_minstrel_ht_exit();
1252 rc80211_minstrel_exit();
1256 ieee80211_iface_exit();
1262 subsys_initcall(ieee80211_init
);
1263 module_exit(ieee80211_exit
);
1265 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1266 MODULE_LICENSE("GPL");