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 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
;
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 mutex_lock(&local
->mtx
);
254 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
255 rcu_dereference_protected(local
->sched_scan_sdata
,
256 lockdep_is_held(&local
->mtx
)),
257 "%s called with hardware scan in progress\n", __func__
);
258 mutex_unlock(&local
->mtx
);
261 ieee80211_scan_cancel(local
);
262 ieee80211_reconfig(local
);
266 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
268 struct ieee80211_local
*local
= hw_to_local(hw
);
270 trace_api_restart_hw(local
);
272 wiphy_info(hw
->wiphy
,
273 "Hardware restart was requested\n");
275 /* use this reason, ieee80211_reconfig will unblock it */
276 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
277 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
280 * Stop all Rx during the reconfig. We don't want state changes
281 * or driver callbacks while this is in progress.
283 local
->in_reconfig
= true;
286 schedule_work(&local
->restart_work
);
288 EXPORT_SYMBOL(ieee80211_restart_hw
);
291 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
292 unsigned long data
, void *arg
)
294 struct in_ifaddr
*ifa
= arg
;
295 struct ieee80211_local
*local
=
296 container_of(nb
, struct ieee80211_local
,
298 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
299 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
300 struct in_device
*idev
;
301 struct ieee80211_sub_if_data
*sdata
;
302 struct ieee80211_bss_conf
*bss_conf
;
303 struct ieee80211_if_managed
*ifmgd
;
306 /* Make sure it's our interface that got changed */
310 if (wdev
->wiphy
!= local
->hw
.wiphy
)
313 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
314 bss_conf
= &sdata
->vif
.bss_conf
;
316 /* ARP filtering is only supported in managed mode */
317 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
320 idev
= __in_dev_get_rtnl(sdata
->dev
);
324 ifmgd
= &sdata
->u
.mgd
;
327 /* Copy the addresses to the bss_conf list */
328 ifa
= idev
->ifa_list
;
330 if (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
)
331 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
336 bss_conf
->arp_addr_cnt
= c
;
338 /* Configure driver only if associated (which also implies it is up) */
339 if (ifmgd
->associated
)
340 ieee80211_bss_info_change_notify(sdata
,
341 BSS_CHANGED_ARP_FILTER
);
349 #if IS_ENABLED(CONFIG_IPV6)
350 static int ieee80211_ifa6_changed(struct notifier_block
*nb
,
351 unsigned long data
, void *arg
)
353 struct inet6_ifaddr
*ifa
= (struct inet6_ifaddr
*)arg
;
354 struct inet6_dev
*idev
= ifa
->idev
;
355 struct net_device
*ndev
= ifa
->idev
->dev
;
356 struct ieee80211_local
*local
=
357 container_of(nb
, struct ieee80211_local
, ifa6_notifier
);
358 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
359 struct ieee80211_sub_if_data
*sdata
;
361 /* Make sure it's our interface that got changed */
362 if (!wdev
|| wdev
->wiphy
!= local
->hw
.wiphy
)
365 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
368 * For now only support station mode. This is mostly because
369 * doing AP would have to handle AP_VLAN in some way ...
371 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
374 drv_ipv6_addr_change(local
, sdata
, idev
);
380 /* There isn't a lot of sense in it, but you can transmit anything you like */
381 static const struct ieee80211_txrx_stypes
382 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
383 [NL80211_IFTYPE_ADHOC
] = {
385 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
386 BIT(IEEE80211_STYPE_AUTH
>> 4) |
387 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
388 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
390 [NL80211_IFTYPE_STATION
] = {
392 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
393 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
395 [NL80211_IFTYPE_AP
] = {
397 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
398 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
399 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
400 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
401 BIT(IEEE80211_STYPE_AUTH
>> 4) |
402 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
403 BIT(IEEE80211_STYPE_ACTION
>> 4),
405 [NL80211_IFTYPE_AP_VLAN
] = {
408 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
409 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
410 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
411 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
412 BIT(IEEE80211_STYPE_AUTH
>> 4) |
413 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
414 BIT(IEEE80211_STYPE_ACTION
>> 4),
416 [NL80211_IFTYPE_P2P_CLIENT
] = {
418 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
421 [NL80211_IFTYPE_P2P_GO
] = {
423 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
424 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
425 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
426 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
427 BIT(IEEE80211_STYPE_AUTH
>> 4) |
428 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
429 BIT(IEEE80211_STYPE_ACTION
>> 4),
431 [NL80211_IFTYPE_MESH_POINT
] = {
433 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
434 BIT(IEEE80211_STYPE_AUTH
>> 4) |
435 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
437 [NL80211_IFTYPE_P2P_DEVICE
] = {
439 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask
= {
445 .ampdu_params_info
= IEEE80211_HT_AMPDU_PARM_FACTOR
|
446 IEEE80211_HT_AMPDU_PARM_DENSITY
,
448 .cap_info
= cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
|
449 IEEE80211_HT_CAP_MAX_AMSDU
|
450 IEEE80211_HT_CAP_SGI_20
|
451 IEEE80211_HT_CAP_SGI_40
),
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 static const u8 extended_capabilities
[] = {
481 WLAN_EXT_CAPA8_OPMODE_NOTIF
,
484 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
485 const struct ieee80211_ops
*ops
)
487 struct ieee80211_local
*local
;
492 if (WARN_ON(!ops
->tx
|| !ops
->start
|| !ops
->stop
|| !ops
->config
||
493 !ops
->add_interface
|| !ops
->remove_interface
||
494 !ops
->configure_filter
))
497 if (WARN_ON(ops
->sta_state
&& (ops
->sta_add
|| ops
->sta_remove
)))
500 /* check all or no channel context operations exist */
501 i
= !!ops
->add_chanctx
+ !!ops
->remove_chanctx
+
502 !!ops
->change_chanctx
+ !!ops
->assign_vif_chanctx
+
503 !!ops
->unassign_vif_chanctx
;
504 if (WARN_ON(i
!= 0 && i
!= 5))
506 use_chanctx
= i
== 5;
508 /* Ensure 32-byte alignment of our private data and hw private data.
509 * We use the wiphy priv data for both our ieee80211_local and for
510 * the driver's private data
512 * In memory it'll be like this:
514 * +-------------------------+
516 * +-------------------------+
517 * | struct ieee80211_local |
518 * +-------------------------+
519 * | driver's private data |
520 * +-------------------------+
523 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
525 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
530 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
532 wiphy
->privid
= mac80211_wiphy_privid
;
534 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
535 WIPHY_FLAG_4ADDR_AP
|
536 WIPHY_FLAG_4ADDR_STATION
|
537 WIPHY_FLAG_REPORTS_OBSS
|
538 WIPHY_FLAG_OFFCHAN_TX
;
540 wiphy
->extended_capabilities
= extended_capabilities
;
541 wiphy
->extended_capabilities_mask
= extended_capabilities
;
542 wiphy
->extended_capabilities_len
= ARRAY_SIZE(extended_capabilities
);
544 if (ops
->remain_on_channel
)
545 wiphy
->flags
|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL
;
547 wiphy
->features
|= NL80211_FEATURE_SK_TX_STATUS
|
548 NL80211_FEATURE_SAE
|
549 NL80211_FEATURE_HT_IBSS
|
550 NL80211_FEATURE_VIF_TXPOWER
|
551 NL80211_FEATURE_USERSPACE_MPM
;
554 wiphy
->features
|= NL80211_FEATURE_LOW_PRIORITY_SCAN
|
555 NL80211_FEATURE_AP_SCAN
;
559 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
561 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
563 local
= wiphy_priv(wiphy
);
565 local
->hw
.wiphy
= wiphy
;
567 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
570 local
->use_chanctx
= use_chanctx
;
572 /* set up some defaults */
573 local
->hw
.queues
= 1;
574 local
->hw
.max_rates
= 1;
575 local
->hw
.max_report_rates
= 0;
576 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
577 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
578 local
->hw
.offchannel_tx_hw_queue
= IEEE80211_INVAL_HW_QUEUE
;
579 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
580 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
581 local
->hw
.radiotap_mcs_details
= IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
582 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
583 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
584 local
->hw
.radiotap_vht_details
= IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
585 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
;
586 local
->hw
.uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
587 local
->hw
.uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
588 local
->user_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
589 wiphy
->ht_capa_mod_mask
= &mac80211_ht_capa_mod_mask
;
590 wiphy
->vht_capa_mod_mask
= &mac80211_vht_capa_mod_mask
;
592 INIT_LIST_HEAD(&local
->interfaces
);
594 __hw_addr_init(&local
->mc_list
);
596 mutex_init(&local
->iflist_mtx
);
597 mutex_init(&local
->mtx
);
599 mutex_init(&local
->key_mtx
);
600 spin_lock_init(&local
->filter_lock
);
601 spin_lock_init(&local
->rx_path_lock
);
602 spin_lock_init(&local
->queue_stop_reason_lock
);
604 INIT_LIST_HEAD(&local
->chanctx_list
);
605 mutex_init(&local
->chanctx_mtx
);
607 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
609 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
611 INIT_WORK(&local
->radar_detected_work
,
612 ieee80211_dfs_radar_detected_work
);
614 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
615 local
->smps_mode
= IEEE80211_SMPS_OFF
;
617 INIT_WORK(&local
->dynamic_ps_enable_work
,
618 ieee80211_dynamic_ps_enable_work
);
619 INIT_WORK(&local
->dynamic_ps_disable_work
,
620 ieee80211_dynamic_ps_disable_work
);
621 setup_timer(&local
->dynamic_ps_timer
,
622 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
624 INIT_WORK(&local
->sched_scan_stopped_work
,
625 ieee80211_sched_scan_stopped_work
);
627 spin_lock_init(&local
->ack_status_lock
);
628 idr_init(&local
->ack_status_frames
);
630 sta_info_init(local
);
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_led_names(local
);
648 ieee80211_roc_setup(local
);
652 EXPORT_SYMBOL(ieee80211_alloc_hw
);
654 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
656 struct ieee80211_local
*local
= hw_to_local(hw
);
658 enum ieee80211_band band
;
659 int channels
, max_bitrates
;
660 bool supp_ht
, supp_vht
;
661 netdev_features_t feature_whitelist
;
662 struct cfg80211_chan_def dflt_chandef
= {};
663 static const u32 cipher_suites
[] = {
664 /* keep WEP first, it may be removed below */
665 WLAN_CIPHER_SUITE_WEP40
,
666 WLAN_CIPHER_SUITE_WEP104
,
667 WLAN_CIPHER_SUITE_TKIP
,
668 WLAN_CIPHER_SUITE_CCMP
,
670 /* keep last -- depends on hw flags! */
671 WLAN_CIPHER_SUITE_AES_CMAC
674 if (hw
->flags
& IEEE80211_HW_QUEUE_CONTROL
&&
675 (local
->hw
.offchannel_tx_hw_queue
== IEEE80211_INVAL_HW_QUEUE
||
676 local
->hw
.offchannel_tx_hw_queue
>= local
->hw
.queues
))
680 if (hw
->wiphy
->wowlan
&& (!local
->ops
->suspend
|| !local
->ops
->resume
))
684 if (!local
->use_chanctx
) {
685 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
686 const struct ieee80211_iface_combination
*comb
;
688 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
690 if (comb
->num_different_channels
> 1)
695 * WDS is currently prohibited when channel contexts are used
696 * because there's no clear definition of which channel WDS
697 * type interfaces use
699 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_WDS
))
702 /* DFS currently not supported with channel context drivers */
703 for (i
= 0; i
< local
->hw
.wiphy
->n_iface_combinations
; i
++) {
704 const struct ieee80211_iface_combination
*comb
;
706 comb
= &local
->hw
.wiphy
->iface_combinations
[i
];
708 if (comb
->radar_detect_widths
)
713 /* Only HW csum features are currently compatible with mac80211 */
714 feature_whitelist
= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
716 if (WARN_ON(hw
->netdev_features
& ~feature_whitelist
))
719 if (hw
->max_report_rates
== 0)
720 hw
->max_report_rates
= hw
->max_rates
;
722 local
->rx_chains
= 1;
725 * generic code guarantees at least one band,
726 * set this very early because much code assumes
727 * that hw.conf.channel is assigned
733 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
734 struct ieee80211_supported_band
*sband
;
736 sband
= local
->hw
.wiphy
->bands
[band
];
740 if (!dflt_chandef
.chan
) {
741 cfg80211_chandef_create(&dflt_chandef
,
744 /* init channel we're on */
745 if (!local
->use_chanctx
&& !local
->_oper_chandef
.chan
) {
746 local
->hw
.conf
.chandef
= dflt_chandef
;
747 local
->_oper_chandef
= dflt_chandef
;
749 local
->monitor_chandef
= dflt_chandef
;
752 channels
+= sband
->n_channels
;
754 if (max_bitrates
< sband
->n_bitrates
)
755 max_bitrates
= sband
->n_bitrates
;
756 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
757 supp_vht
= supp_vht
|| sband
->vht_cap
.vht_supported
;
759 if (sband
->ht_cap
.ht_supported
)
761 max(ieee80211_mcs_to_chains(&sband
->ht_cap
.mcs
),
764 /* TODO: consider VHT for RX chains, hopefully it's the same */
767 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
768 sizeof(void *) * channels
, GFP_KERNEL
);
769 if (!local
->int_scan_req
)
772 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
773 if (!local
->hw
.wiphy
->bands
[band
])
775 local
->int_scan_req
->rates
[band
] = (u32
) -1;
778 /* if low-level driver supports AP, we also support VLAN */
779 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
780 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
781 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
784 /* mac80211 always supports monitor */
785 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
786 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
788 /* mac80211 doesn't support more than one IBSS interface right now */
789 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
790 const struct ieee80211_iface_combination
*c
;
793 c
= &hw
->wiphy
->iface_combinations
[i
];
795 for (j
= 0; j
< c
->n_limits
; j
++)
796 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
797 c
->limits
[j
].max
> 1)
801 #ifndef CONFIG_MAC80211_MESH
802 /* mesh depends on Kconfig, but drivers should set it if they want */
803 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
806 /* if the underlying driver supports mesh, mac80211 will (at least)
807 * provide routing of mesh authentication frames to userspace */
808 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
809 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
811 /* mac80211 supports control port protocol changing */
812 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
814 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
815 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
816 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
817 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
819 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
820 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
821 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
824 * Calculate scan IE length -- we need this to alloc
825 * memory and to subtract from the driver limit. It
826 * includes the DS Params, (extended) supported rates, and HT
827 * information -- SSID is the driver's responsibility.
829 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
832 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
835 local
->scan_ies_len
+=
836 2 + sizeof(struct ieee80211_vht_cap
);
838 if (!local
->ops
->hw_scan
) {
839 /* For hw_scan, driver needs to set these up. */
840 local
->hw
.wiphy
->max_scan_ssids
= 4;
841 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
845 * If the driver supports any scan IEs, then assume the
846 * limit includes the IEs mac80211 will add, otherwise
847 * leave it at zero and let the driver sort it out; we
848 * still pass our IEs to the driver but userspace will
849 * not be allowed to in that case.
851 if (local
->hw
.wiphy
->max_scan_ie_len
)
852 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
854 /* Set up cipher suites unless driver already did */
855 if (!local
->hw
.wiphy
->cipher_suites
) {
856 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
857 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
858 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
859 local
->hw
.wiphy
->n_cipher_suites
--;
861 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
862 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
863 local
->hw
.wiphy
->cipher_suites
+= 2;
864 local
->hw
.wiphy
->n_cipher_suites
-= 2;
872 local
->hw
.wiphy
->cipher_suites
,
873 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
877 goto fail_wiphy_register
;
879 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
880 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
881 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
882 suite
== WLAN_CIPHER_SUITE_WEP104
)
886 local
->hw
.wiphy
->cipher_suites
= suites
;
887 local
->hw
.wiphy
->n_cipher_suites
= w
;
888 local
->wiphy_ciphers_allocated
= true;
892 if (!local
->ops
->remain_on_channel
)
893 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
895 /* mac80211 based drivers don't support internal TDLS setup */
896 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
897 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
899 result
= wiphy_register(local
->hw
.wiphy
);
901 goto fail_wiphy_register
;
904 * We use the number of queues for feature tests (QoS, HT) internally
905 * so restrict them appropriately.
907 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
908 hw
->queues
= IEEE80211_MAX_QUEUES
;
911 alloc_ordered_workqueue("%s", 0, wiphy_name(local
->hw
.wiphy
));
912 if (!local
->workqueue
) {
918 * The hardware needs headroom for sending the frame,
919 * and we need some headroom for passing the frame to monitor
920 * interfaces, but never both at the same time.
922 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
923 IEEE80211_TX_STATUS_HEADROOM
);
925 debugfs_hw_add(local
);
928 * if the driver doesn't specify a max listen interval we
929 * use 5 which should be a safe default
931 if (local
->hw
.max_listen_interval
== 0)
932 local
->hw
.max_listen_interval
= 5;
934 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
936 local
->dynamic_ps_forced_timeout
= -1;
938 result
= ieee80211_wep_init(local
);
940 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
943 ieee80211_led_init(local
);
947 result
= ieee80211_init_rate_ctrl_alg(local
,
948 hw
->rate_control_algorithm
);
950 wiphy_debug(local
->hw
.wiphy
,
951 "Failed to initialize rate control algorithm\n");
955 /* add one default STA interface if supported */
956 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
957 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
958 NL80211_IFTYPE_STATION
, NULL
);
960 wiphy_warn(local
->hw
.wiphy
,
961 "Failed to add default virtual iface\n");
966 local
->network_latency_notifier
.notifier_call
=
967 ieee80211_max_network_latency
;
968 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
969 &local
->network_latency_notifier
);
976 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
977 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
982 #if IS_ENABLED(CONFIG_IPV6)
983 local
->ifa6_notifier
.notifier_call
= ieee80211_ifa6_changed
;
984 result
= register_inet6addr_notifier(&local
->ifa6_notifier
);
991 #if IS_ENABLED(CONFIG_IPV6)
994 unregister_inetaddr_notifier(&local
->ifa_notifier
);
997 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
999 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1000 &local
->network_latency_notifier
);
1004 ieee80211_led_exit(local
);
1005 ieee80211_remove_interfaces(local
);
1008 ieee80211_wep_free(local
);
1009 sta_info_stop(local
);
1010 destroy_workqueue(local
->workqueue
);
1012 wiphy_unregister(local
->hw
.wiphy
);
1013 fail_wiphy_register
:
1014 if (local
->wiphy_ciphers_allocated
)
1015 kfree(local
->hw
.wiphy
->cipher_suites
);
1016 kfree(local
->int_scan_req
);
1019 EXPORT_SYMBOL(ieee80211_register_hw
);
1021 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1023 struct ieee80211_local
*local
= hw_to_local(hw
);
1025 tasklet_kill(&local
->tx_pending_tasklet
);
1026 tasklet_kill(&local
->tasklet
);
1028 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1029 &local
->network_latency_notifier
);
1031 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1033 #if IS_ENABLED(CONFIG_IPV6)
1034 unregister_inet6addr_notifier(&local
->ifa6_notifier
);
1040 * At this point, interface list manipulations are fine
1041 * because the driver cannot be handing us frames any
1042 * more and the tasklet is killed.
1044 ieee80211_remove_interfaces(local
);
1048 cancel_work_sync(&local
->restart_work
);
1049 cancel_work_sync(&local
->reconfig_filter
);
1051 ieee80211_clear_tx_pending(local
);
1052 rate_control_deinitialize(local
);
1054 if (skb_queue_len(&local
->skb_queue
) ||
1055 skb_queue_len(&local
->skb_queue_unreliable
))
1056 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1057 skb_queue_purge(&local
->skb_queue
);
1058 skb_queue_purge(&local
->skb_queue_unreliable
);
1060 destroy_workqueue(local
->workqueue
);
1061 wiphy_unregister(local
->hw
.wiphy
);
1062 sta_info_stop(local
);
1063 ieee80211_wep_free(local
);
1064 ieee80211_led_exit(local
);
1065 kfree(local
->int_scan_req
);
1067 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1069 static int ieee80211_free_ack_frame(int id
, void *p
, void *data
)
1071 WARN_ONCE(1, "Have pending ack frames!\n");
1076 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1078 struct ieee80211_local
*local
= hw_to_local(hw
);
1080 mutex_destroy(&local
->iflist_mtx
);
1081 mutex_destroy(&local
->mtx
);
1083 if (local
->wiphy_ciphers_allocated
)
1084 kfree(local
->hw
.wiphy
->cipher_suites
);
1086 idr_for_each(&local
->ack_status_frames
,
1087 ieee80211_free_ack_frame
, NULL
);
1088 idr_destroy(&local
->ack_status_frames
);
1090 wiphy_free(local
->hw
.wiphy
);
1092 EXPORT_SYMBOL(ieee80211_free_hw
);
1094 static int __init
ieee80211_init(void)
1096 struct sk_buff
*skb
;
1099 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1100 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1101 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1103 ret
= rc80211_minstrel_init();
1107 ret
= rc80211_minstrel_ht_init();
1111 ret
= rc80211_pid_init();
1115 ret
= ieee80211_iface_init();
1123 rc80211_minstrel_ht_exit();
1125 rc80211_minstrel_exit();
1130 static void __exit
ieee80211_exit(void)
1133 rc80211_minstrel_ht_exit();
1134 rc80211_minstrel_exit();
1138 ieee80211_iface_exit();
1144 subsys_initcall(ieee80211_init
);
1145 module_exit(ieee80211_exit
);
1147 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1148 MODULE_LICENSE("GPL");