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_chandef
.chan
) {
106 chandef
= local
->scan_chandef
;
107 } else if (local
->tmp_channel
) {
108 chandef
.chan
= local
->tmp_channel
;
109 chandef
.width
= NL80211_CHAN_WIDTH_20_NOHT
;
110 chandef
.center_freq1
= chandef
.chan
->center_freq
;
112 chandef
= local
->_oper_chandef
;
114 WARN(!cfg80211_chandef_valid(&chandef
),
115 "control:%d MHz width:%d center: %d/%d MHz",
116 chandef
.chan
->center_freq
, chandef
.width
,
117 chandef
.center_freq1
, chandef
.center_freq2
);
119 if (!cfg80211_chandef_identical(&chandef
, &local
->_oper_chandef
))
120 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
122 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
124 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
126 if (offchannel_flag
||
127 !cfg80211_chandef_identical(&local
->hw
.conf
.chandef
,
128 &local
->_oper_chandef
)) {
129 local
->hw
.conf
.chandef
= chandef
;
130 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
133 if (!conf_is_ht(&local
->hw
.conf
)) {
135 * mac80211.h documents that this is only valid
136 * when the channel is set to an HT type, and
137 * that otherwise STATIC is used.
139 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
140 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
141 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
142 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
145 power
= ieee80211_chandef_max_power(&chandef
);
148 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
149 if (!rcu_access_pointer(sdata
->vif
.chanctx_conf
))
151 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
153 power
= min(power
, sdata
->vif
.bss_conf
.txpower
);
157 if (local
->hw
.conf
.power_level
!= power
) {
158 changed
|= IEEE80211_CONF_CHANGE_POWER
;
159 local
->hw
.conf
.power_level
= power
;
165 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
171 if (!local
->use_chanctx
)
172 changed
|= ieee80211_hw_conf_chan(local
);
174 changed
&= ~(IEEE80211_CONF_CHANGE_CHANNEL
|
175 IEEE80211_CONF_CHANGE_POWER
);
177 if (changed
&& local
->open_count
) {
178 ret
= drv_config(local
, changed
);
181 * HW reconfiguration should never fail, the driver has told
182 * us what it can support so it should live up to that promise.
185 * rfkill is not integrated with mac80211 and a
186 * configuration command can thus fail if hardware rfkill
189 * FIXME: integrate rfkill with mac80211 and then add this
199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
202 struct ieee80211_local
*local
= sdata
->local
;
204 if (!changed
|| sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
207 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
210 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
212 sdata
->vif
.bss_conf
.use_cts_prot
= false;
213 sdata
->vif
.bss_conf
.use_short_preamble
= false;
214 sdata
->vif
.bss_conf
.use_short_slot
= false;
215 return BSS_CHANGED_ERP_CTS_PROT
|
216 BSS_CHANGED_ERP_PREAMBLE
|
217 BSS_CHANGED_ERP_SLOT
;
220 static void ieee80211_tasklet_handler(unsigned long data
)
222 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
225 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
226 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
227 switch (skb
->pkt_type
) {
228 case IEEE80211_RX_MSG
:
229 /* Clear skb->pkt_type in order to not confuse kernel
232 ieee80211_rx(&local
->hw
, skb
);
234 case IEEE80211_TX_STATUS_MSG
:
236 ieee80211_tx_status(&local
->hw
, skb
);
239 WARN(1, "mac80211: Packet is of unknown type %d\n",
247 static void ieee80211_restart_work(struct work_struct
*work
)
249 struct ieee80211_local
*local
=
250 container_of(work
, struct ieee80211_local
, restart_work
);
252 /* wait for scan work complete */
253 flush_workqueue(local
->workqueue
);
255 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
),
256 "%s called with hardware scan in progress\n", __func__
);
259 ieee80211_scan_cancel(local
);
260 ieee80211_reconfig(local
);
264 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
266 struct ieee80211_local
*local
= hw_to_local(hw
);
268 trace_api_restart_hw(local
);
270 wiphy_info(hw
->wiphy
,
271 "Hardware restart was requested\n");
273 /* use this reason, ieee80211_reconfig will unblock it */
274 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
275 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 schedule_work(&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
),
451 .rx_mask
= { 0xff, 0xff, 0xff, 0xff, 0xff,
452 0xff, 0xff, 0xff, 0xff, 0xff, },
456 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask
= {
458 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC
|
459 IEEE80211_VHT_CAP_SHORT_GI_80
|
460 IEEE80211_VHT_CAP_SHORT_GI_160
|
461 IEEE80211_VHT_CAP_RXSTBC_1
|
462 IEEE80211_VHT_CAP_RXSTBC_2
|
463 IEEE80211_VHT_CAP_RXSTBC_3
|
464 IEEE80211_VHT_CAP_RXSTBC_4
|
465 IEEE80211_VHT_CAP_TXSTBC
|
466 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
467 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
468 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN
|
469 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN
|
470 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
),
472 .rx_mcs_map
= cpu_to_le16(~0),
473 .tx_mcs_map
= cpu_to_le16(~0),
477 static const u8 extended_capabilities
[] = {
479 WLAN_EXT_CAPA8_OPMODE_NOTIF
,
482 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
483 const struct ieee80211_ops
*ops
)
485 struct ieee80211_local
*local
;
490 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
491 !ops
->add_interface
|| !ops
->remove_interface
||
492 !ops
->configure_filter
))
495 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
498 /* check all or no channel context operations exist */
499 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
500 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
501 !!ops
->unassign_vif_chanctx
;
502 if (WARN_ON(i
!= 0 && i
!= 5))
504 use_chanctx
= i
== 5;
506 /* Ensure 32-byte alignment of our private data and hw private data.
507 * We use the wiphy priv data for both our ieee80211_local and for
508 * the driver's private data
510 * In memory it'll be like this:
512 * +-------------------------+
514 * +-------------------------+
515 * | struct ieee80211_local |
516 * +-------------------------+
517 * | driver's private data |
518 * +-------------------------+
521 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
523 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
528 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
530 wiphy
->privid
= mac80211_wiphy_privid
;
532 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
533 WIPHY_FLAG_4ADDR_AP
|
534 WIPHY_FLAG_4ADDR_STATION
|
535 WIPHY_FLAG_REPORTS_OBSS
|
536 WIPHY_FLAG_OFFCHAN_TX
;
538 wiphy
->extended_capabilities
= extended_capabilities
;
539 wiphy
->extended_capabilities_mask
= extended_capabilities
;
540 wiphy
->extended_capabilities_len
= ARRAY_SIZE(extended_capabilities
);
542 if (ops
->remain_on_channel
)
543 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
545 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
546 NL80211_FEATURE_SAE
|
547 NL80211_FEATURE_HT_IBSS
|
548 NL80211_FEATURE_VIF_TXPOWER
|
549 NL80211_FEATURE_USERSPACE_MPM
;
552 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
553 NL80211_FEATURE_AP_SCAN
;
557 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
559 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
561 local
= wiphy_priv(wiphy
);
563 local
->hw
.wiphy
= wiphy
;
565 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
568 local
->use_chanctx
= use_chanctx
;
570 /* set up some defaults */
571 local
->hw
.queues
= 1;
572 local
->hw
.max_rates
= 1;
573 local
->hw
.max_report_rates
= 0;
574 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
575 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
576 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
577 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
578 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
579 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
580 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
581 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
582 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
583 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
584 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
585 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
586 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
587 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
588 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
590 INIT_LIST_HEAD(&local
->interfaces
);
592 __hw_addr_init(&local
->mc_list
);
594 mutex_init(&local
->iflist_mtx
);
595 mutex_init(&local
->mtx
);
597 mutex_init(&local
->key_mtx
);
598 spin_lock_init(&local
->filter_lock
);
599 spin_lock_init(&local
->rx_path_lock
);
600 spin_lock_init(&local
->queue_stop_reason_lock
);
602 INIT_LIST_HEAD(&local
->chanctx_list
);
603 mutex_init(&local
->chanctx_mtx
);
605 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
607 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
609 INIT_WORK(&local
->radar_detected_work
,
610 ieee80211_dfs_radar_detected_work
);
612 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
613 local
->smps_mode
= IEEE80211_SMPS_OFF
;
615 INIT_WORK(&local
->dynamic_ps_enable_work
,
616 ieee80211_dynamic_ps_enable_work
);
617 INIT_WORK(&local
->dynamic_ps_disable_work
,
618 ieee80211_dynamic_ps_disable_work
);
619 setup_timer(&local
->dynamic_ps_timer
,
620 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
622 INIT_WORK(&local
->sched_scan_stopped_work
,
623 ieee80211_sched_scan_stopped_work
);
625 spin_lock_init(&local
->ack_status_lock
);
626 idr_init(&local
->ack_status_frames
);
628 sta_info_init(local
);
630 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
631 skb_queue_head_init(&local
->pending
[i
]);
632 atomic_set(&local
->agg_queue_stop
[i
], 0);
634 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
635 (unsigned long)local
);
637 tasklet_init(&local
->tasklet
,
638 ieee80211_tasklet_handler
,
639 (unsigned long) local
);
641 skb_queue_head_init(&local
->skb_queue
);
642 skb_queue_head_init(&local
->skb_queue_unreliable
);
644 ieee80211_led_names(local
);
646 ieee80211_roc_setup(local
);
650 EXPORT_SYMBOL(ieee80211_alloc_hw
);
652 static int ieee80211_init_cipher_suites(struct ieee80211_local
*local
)
654 bool have_wep
= !(IS_ERR(local
->wep_tx_tfm
) ||
655 IS_ERR(local
->wep_rx_tfm
));
656 bool have_mfp
= local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
;
657 const struct ieee80211_cipher_scheme
*cs
= local
->hw
.cipher_schemes
;
658 int n_suites
= 0, r
= 0, w
= 0;
660 static const u32 cipher_suites
[] = {
661 /* keep WEP first, it may be removed below */
662 WLAN_CIPHER_SUITE_WEP40
,
663 WLAN_CIPHER_SUITE_WEP104
,
664 WLAN_CIPHER_SUITE_TKIP
,
665 WLAN_CIPHER_SUITE_CCMP
,
667 /* keep last -- depends on hw flags! */
668 WLAN_CIPHER_SUITE_AES_CMAC
671 /* Driver specifies the ciphers, we have nothing to do... */
672 if (local
->hw
.wiphy
->cipher_suites
&& have_wep
)
675 /* Set up cipher suites if driver relies on mac80211 cipher defs */
676 if (!local
->hw
.wiphy
->cipher_suites
&& !cs
) {
677 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
678 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
681 local
->hw
.wiphy
->n_cipher_suites
--;
684 local
->hw
.wiphy
->cipher_suites
+= 2;
685 local
->hw
.wiphy
->n_cipher_suites
-= 2;
691 if (!local
->hw
.wiphy
->cipher_suites
) {
693 * Driver specifies cipher schemes only
694 * We start counting ciphers defined by schemes, TKIP and CCMP
696 n_suites
= local
->hw
.n_cipher_schemes
+ 2;
698 /* check if we have WEP40 and WEP104 */
702 /* check if we have AES_CMAC */
706 suites
= kmalloc(sizeof(u32
) * n_suites
, GFP_KERNEL
);
710 suites
[w
++] = WLAN_CIPHER_SUITE_CCMP
;
711 suites
[w
++] = WLAN_CIPHER_SUITE_TKIP
;
714 suites
[w
++] = WLAN_CIPHER_SUITE_WEP40
;
715 suites
[w
++] = WLAN_CIPHER_SUITE_WEP104
;
719 suites
[w
++] = WLAN_CIPHER_SUITE_AES_CMAC
;
721 for (r
= 0; r
< local
->hw
.n_cipher_schemes
; r
++)
722 suites
[w
++] = cs
[r
].cipher
;
724 /* Driver provides cipher suites, but we need to exclude WEP */
725 suites
= kmemdup(local
->hw
.wiphy
->cipher_suites
,
726 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
731 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
732 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
734 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
735 suite
== WLAN_CIPHER_SUITE_WEP104
)
741 local
->hw
.wiphy
->cipher_suites
= suites
;
742 local
->hw
.wiphy
->n_cipher_suites
= w
;
743 local
->wiphy_ciphers_allocated
= true;
748 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
750 struct ieee80211_local
*local
= hw_to_local(hw
);
752 enum ieee80211_band band
;
753 int channels
, max_bitrates
;
754 bool supp_ht
, supp_vht
;
755 netdev_features_t feature_whitelist
;
756 struct cfg80211_chan_def dflt_chandef
= {};
758 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
759 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
760 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
764 if (hw
->wiphy
->wowlan
&& (!local
->ops
->suspend
|| !local
->ops
->resume
))
768 if (!local
->use_chanctx
) {
769 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
770 const struct ieee80211_iface_combination
*comb
;
772 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
774 if (comb
->num_different_channels
> 1)
779 * WDS is currently prohibited when channel contexts are used
780 * because there's no clear definition of which channel WDS
781 * type interfaces use
783 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
786 /* DFS currently not supported with channel context drivers */
787 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
788 const struct ieee80211_iface_combination
*comb
;
790 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
792 if (comb
->radar_detect_widths
)
797 /* Only HW csum features are currently compatible with mac80211 */
798 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
800 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
803 if (hw
->max_report_rates
== 0)
804 hw
->max_report_rates
= hw
->max_rates
;
806 local
->rx_chains
= 1;
809 * generic code guarantees at least one band,
810 * set this very early because much code assumes
811 * that hw.conf.channel is assigned
817 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
818 struct ieee80211_supported_band
*sband
;
820 sband
= local
->hw
.wiphy
->bands
[band
];
824 if (!dflt_chandef
.chan
) {
825 cfg80211_chandef_create(&dflt_chandef
,
828 /* init channel we're on */
829 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
830 local
->hw
.conf
.chandef
= dflt_chandef
;
831 local
->_oper_chandef
= dflt_chandef
;
833 local
->monitor_chandef
= dflt_chandef
;
836 channels
+= sband
->n_channels
;
838 if (max_bitrates
< sband
->n_bitrates
)
839 max_bitrates
= sband
->n_bitrates
;
840 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
841 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
843 if (sband
->ht_cap
.ht_supported
)
845 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
848 /* TODO: consider VHT for RX chains, hopefully it's the same */
851 /* if low-level driver supports AP, we also support VLAN */
852 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
853 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
854 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
857 /* mac80211 always supports monitor */
858 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
859 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
861 /* mac80211 doesn't support more than one IBSS interface right now */
862 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
863 const struct ieee80211_iface_combination
*c
;
866 c
= &hw
->wiphy
->iface_combinations
[i
];
868 for (j
= 0; j
< c
->n_limits
; j
++)
869 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
870 c
->limits
[j
].max
> 1)
874 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
875 sizeof(void *) * channels
, GFP_KERNEL
);
876 if (!local
->int_scan_req
)
879 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
880 if (!local
->hw
.wiphy
->bands
[band
])
882 local
->int_scan_req
->rates
[band
] = (u32
) -1;
885 #ifndef CONFIG_MAC80211_MESH
886 /* mesh depends on Kconfig, but drivers should set it if they want */
887 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
890 /* if the underlying driver supports mesh, mac80211 will (at least)
891 * provide routing of mesh authentication frames to userspace */
892 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
893 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
895 /* mac80211 supports control port protocol changing */
896 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
898 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
) {
899 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
900 } else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
) {
901 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
902 if (hw
->max_signal
<= 0) {
904 goto fail_wiphy_register
;
908 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
909 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
910 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
913 * Calculate scan IE length -- we need this to alloc
914 * memory and to subtract from the driver limit. It
915 * includes the DS Params, (extended) supported rates, and HT
916 * information -- SSID is the driver's responsibility.
918 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
921 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
924 local
->scan_ies_len
+=
925 2 + sizeof(struct ieee80211_vht_cap
);
927 if (!local
->ops
->hw_scan
) {
928 /* For hw_scan, driver needs to set these up. */
929 local
->hw
.wiphy
->max_scan_ssids
= 4;
930 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
934 * If the driver supports any scan IEs, then assume the
935 * limit includes the IEs mac80211 will add, otherwise
936 * leave it at zero and let the driver sort it out; we
937 * still pass our IEs to the driver but userspace will
938 * not be allowed to in that case.
940 if (local
->hw
.wiphy
->max_scan_ie_len
)
941 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
943 WARN_ON(!ieee80211_cs_list_valid(local
->hw
.cipher_schemes
,
944 local
->hw
.n_cipher_schemes
));
946 result
= ieee80211_init_cipher_suites(local
);
948 goto fail_wiphy_register
;
950 if (!local
->ops
->remain_on_channel
)
951 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
953 /* mac80211 based drivers don't support internal TDLS setup */
954 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
955 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
957 result
= wiphy_register(local
->hw
.wiphy
);
959 goto fail_wiphy_register
;
962 * We use the number of queues for feature tests (QoS, HT) internally
963 * so restrict them appropriately.
965 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
966 hw
->queues
= IEEE80211_MAX_QUEUES
;
969 alloc_ordered_workqueue("%s", 0, wiphy_name(local
->hw
.wiphy
));
970 if (!local
->workqueue
) {
976 * The hardware needs headroom for sending the frame,
977 * and we need some headroom for passing the frame to monitor
978 * interfaces, but never both at the same time.
980 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
981 IEEE80211_TX_STATUS_HEADROOM
);
983 debugfs_hw_add(local
);
986 * if the driver doesn't specify a max listen interval we
987 * use 5 which should be a safe default
989 if (local
->hw
.max_listen_interval
== 0)
990 local
->hw
.max_listen_interval
= 5;
992 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
994 local
->dynamic_ps_forced_timeout
= -1;
996 result
= ieee80211_wep_init(local
);
998 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
1001 local
->hw
.conf
.flags
= IEEE80211_CONF_IDLE
;
1003 ieee80211_led_init(local
);
1007 result
= ieee80211_init_rate_ctrl_alg(local
,
1008 hw
->rate_control_algorithm
);
1010 wiphy_debug(local
->hw
.wiphy
,
1011 "Failed to initialize rate control algorithm\n");
1015 /* add one default STA interface if supported */
1016 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
1017 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
1018 NL80211_IFTYPE_STATION
, NULL
);
1020 wiphy_warn(local
->hw
.wiphy
,
1021 "Failed to add default virtual iface\n");
1026 local
->network_latency_notifier
.notifier_call
=
1027 ieee80211_max_network_latency
;
1028 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
1029 &local
->network_latency_notifier
);
1036 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
1037 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
1042 #if IS_ENABLED(CONFIG_IPV6)
1043 local
->ifa6_notifier
.notifier_call
= ieee80211_ifa6_changed
;
1044 result
= register_inet6addr_notifier(&local
->ifa6_notifier
);
1051 #if IS_ENABLED(CONFIG_IPV6)
1054 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1057 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1059 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1060 &local
->network_latency_notifier
);
1064 ieee80211_led_exit(local
);
1065 ieee80211_remove_interfaces(local
);
1068 ieee80211_wep_free(local
);
1069 sta_info_stop(local
);
1070 destroy_workqueue(local
->workqueue
);
1072 wiphy_unregister(local
->hw
.wiphy
);
1073 fail_wiphy_register
:
1074 if (local
->wiphy_ciphers_allocated
)
1075 kfree(local
->hw
.wiphy
->cipher_suites
);
1076 kfree(local
->int_scan_req
);
1079 EXPORT_SYMBOL(ieee80211_register_hw
);
1081 void ieee80211_napi_add(struct ieee80211_hw
*hw
, struct napi_struct
*napi
,
1082 struct net_device
*napi_dev
,
1083 int (*poll
)(struct napi_struct
*, int),
1086 struct ieee80211_local
*local
= hw_to_local(hw
);
1088 netif_napi_add(napi_dev
, napi
, poll
, weight
);
1091 EXPORT_SYMBOL_GPL(ieee80211_napi_add
);
1093 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1095 struct ieee80211_local
*local
= hw_to_local(hw
);
1097 tasklet_kill(&local
->tx_pending_tasklet
);
1098 tasklet_kill(&local
->tasklet
);
1100 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1101 &local
->network_latency_notifier
);
1103 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1105 #if IS_ENABLED(CONFIG_IPV6)
1106 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1112 * At this point, interface list manipulations are fine
1113 * because the driver cannot be handing us frames any
1114 * more and the tasklet is killed.
1116 ieee80211_remove_interfaces(local
);
1120 cancel_work_sync(&local
->restart_work
);
1121 cancel_work_sync(&local
->reconfig_filter
);
1122 flush_work(&local
->sched_scan_stopped_work
);
1124 ieee80211_clear_tx_pending(local
);
1125 rate_control_deinitialize(local
);
1127 if (skb_queue_len(&local
->skb_queue
) ||
1128 skb_queue_len(&local
->skb_queue_unreliable
))
1129 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1130 skb_queue_purge(&local
->skb_queue
);
1131 skb_queue_purge(&local
->skb_queue_unreliable
);
1133 destroy_workqueue(local
->workqueue
);
1134 wiphy_unregister(local
->hw
.wiphy
);
1135 sta_info_stop(local
);
1136 ieee80211_wep_free(local
);
1137 ieee80211_led_exit(local
);
1138 kfree(local
->int_scan_req
);
1140 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1142 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1144 WARN_ONCE(1, "Have pending ack frames!\n");
1149 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1151 struct ieee80211_local
*local
= hw_to_local(hw
);
1153 mutex_destroy(&local
->iflist_mtx
);
1154 mutex_destroy(&local
->mtx
);
1156 if (local
->wiphy_ciphers_allocated
)
1157 kfree(local
->hw
.wiphy
->cipher_suites
);
1159 idr_for_each(&local
->ack_status_frames
,
1160 ieee80211_free_ack_frame
, NULL
);
1161 idr_destroy(&local
->ack_status_frames
);
1163 kfree(rcu_access_pointer(local
->tx_latency
));
1165 wiphy_free(local
->hw
.wiphy
);
1167 EXPORT_SYMBOL(ieee80211_free_hw
);
1169 static int __init
ieee80211_init(void)
1171 struct sk_buff
*skb
;
1174 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1175 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1176 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1178 ret
= rc80211_minstrel_init();
1182 ret
= rc80211_minstrel_ht_init();
1186 ret
= rc80211_pid_init();
1190 ret
= ieee80211_iface_init();
1198 rc80211_minstrel_ht_exit();
1200 rc80211_minstrel_exit();
1205 static void __exit
ieee80211_exit(void)
1208 rc80211_minstrel_ht_exit();
1209 rc80211_minstrel_exit();
1213 ieee80211_iface_exit();
1219 subsys_initcall(ieee80211_init
);
1220 module_exit(ieee80211_exit
);
1222 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1223 MODULE_LICENSE("GPL");