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 <net/ieee80211_radiotap.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/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <linux/pm_qos_params.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
28 #include "ieee80211_i.h"
37 #include "debugfs_netdev.h"
40 * For seeing transmitted packets on monitor interfaces
41 * we have a radiotap header too.
43 struct ieee80211_tx_status_rtap_hdr
{
44 struct ieee80211_radiotap_header hdr
;
49 } __attribute__ ((packed
));
52 /* must be called under mdev tx lock */
53 void ieee80211_configure_filter(struct ieee80211_local
*local
)
55 unsigned int changed_flags
;
56 unsigned int new_flags
= 0;
58 if (atomic_read(&local
->iff_promiscs
))
59 new_flags
|= FIF_PROMISC_IN_BSS
;
61 if (atomic_read(&local
->iff_allmultis
))
62 new_flags
|= FIF_ALLMULTI
;
65 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
67 if (local
->fif_fcsfail
)
68 new_flags
|= FIF_FCSFAIL
;
70 if (local
->fif_plcpfail
)
71 new_flags
|= FIF_PLCPFAIL
;
73 if (local
->fif_control
)
74 new_flags
|= FIF_CONTROL
;
76 if (local
->fif_other_bss
)
77 new_flags
|= FIF_OTHER_BSS
;
79 changed_flags
= local
->filter_flags
^ new_flags
;
84 local
->ops
->configure_filter(local_to_hw(local
),
85 changed_flags
, &new_flags
,
86 local
->mdev
->mc_count
,
87 local
->mdev
->mc_list
);
89 WARN_ON(new_flags
& (1<<31));
91 local
->filter_flags
= new_flags
& ~(1<<31);
94 /* master interface */
96 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
98 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
102 static const struct header_ops ieee80211_header_ops
= {
103 .create
= eth_header
,
104 .parse
= header_parse_80211
,
105 .rebuild
= eth_rebuild_header
,
106 .cache
= eth_header_cache
,
107 .cache_update
= eth_header_cache_update
,
110 static int ieee80211_master_open(struct net_device
*dev
)
112 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
113 struct ieee80211_local
*local
= mpriv
->local
;
114 struct ieee80211_sub_if_data
*sdata
;
115 int res
= -EOPNOTSUPP
;
117 /* we hold the RTNL here so can safely walk the list */
118 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
119 if (netif_running(sdata
->dev
)) {
128 netif_tx_start_all_queues(local
->mdev
);
133 static int ieee80211_master_stop(struct net_device
*dev
)
135 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
136 struct ieee80211_local
*local
= mpriv
->local
;
137 struct ieee80211_sub_if_data
*sdata
;
139 /* we hold the RTNL here so can safely walk the list */
140 list_for_each_entry(sdata
, &local
->interfaces
, list
)
141 if (netif_running(sdata
->dev
))
142 dev_close(sdata
->dev
);
147 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
149 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
150 struct ieee80211_local
*local
= mpriv
->local
;
152 ieee80211_configure_filter(local
);
155 /* everything else */
157 int ieee80211_if_config(struct ieee80211_sub_if_data
*sdata
, u32 changed
)
159 struct ieee80211_local
*local
= sdata
->local
;
160 struct ieee80211_if_conf conf
;
162 if (WARN_ON(!netif_running(sdata
->dev
)))
165 memset(&conf
, 0, sizeof(conf
));
167 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
168 conf
.bssid
= sdata
->u
.mgd
.bssid
;
169 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
170 conf
.bssid
= sdata
->u
.ibss
.bssid
;
171 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
172 conf
.bssid
= sdata
->dev
->dev_addr
;
173 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
174 static const u8 zero
[ETH_ALEN
] = { 0 };
181 if (!local
->ops
->config_interface
)
184 switch (sdata
->vif
.type
) {
185 case NL80211_IFTYPE_AP
:
186 case NL80211_IFTYPE_ADHOC
:
187 case NL80211_IFTYPE_MESH_POINT
:
190 /* do not warn to simplify caller in scan.c */
191 changed
&= ~IEEE80211_IFCC_BEACON_ENABLED
;
192 if (WARN_ON(changed
& IEEE80211_IFCC_BEACON
))
194 changed
&= ~IEEE80211_IFCC_BEACON
;
198 if (changed
& IEEE80211_IFCC_BEACON_ENABLED
) {
199 if (local
->sw_scanning
) {
200 conf
.enable_beacon
= false;
203 * Beacon should be enabled, but AP mode must
204 * check whether there is a beacon configured.
206 switch (sdata
->vif
.type
) {
207 case NL80211_IFTYPE_AP
:
209 !!rcu_dereference(sdata
->u
.ap
.beacon
);
211 case NL80211_IFTYPE_ADHOC
:
212 conf
.enable_beacon
= !!sdata
->u
.ibss
.presp
;
214 case NL80211_IFTYPE_MESH_POINT
:
215 conf
.enable_beacon
= true;
225 conf
.changed
= changed
;
227 return local
->ops
->config_interface(local_to_hw(local
),
231 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
233 struct ieee80211_channel
*chan
;
236 enum nl80211_channel_type channel_type
;
240 if (local
->sw_scanning
) {
241 chan
= local
->scan_channel
;
242 channel_type
= NL80211_CHAN_NO_HT
;
244 chan
= local
->oper_channel
;
245 channel_type
= local
->oper_channel_type
;
248 if (chan
!= local
->hw
.conf
.channel
||
249 channel_type
!= local
->hw
.conf
.channel_type
) {
250 local
->hw
.conf
.channel
= chan
;
251 local
->hw
.conf
.channel_type
= channel_type
;
252 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
255 if (local
->sw_scanning
)
256 power
= chan
->max_power
;
258 power
= local
->power_constr_level
?
259 (chan
->max_power
- local
->power_constr_level
) :
262 if (local
->user_power_level
>= 0)
263 power
= min(power
, local
->user_power_level
);
265 if (local
->hw
.conf
.power_level
!= power
) {
266 changed
|= IEEE80211_CONF_CHANGE_POWER
;
267 local
->hw
.conf
.power_level
= power
;
270 if (changed
&& local
->open_count
) {
271 ret
= local
->ops
->config(local_to_hw(local
), changed
);
274 * HW reconfiguration should never fail, the driver has told
275 * us what it can support so it should live up to that promise.
278 * rfkill is not integrated with mac80211 and a
279 * configuration command can thus fail if hardware rfkill
282 * FIXME: integrate rfkill with mac80211 and then add this
292 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
295 struct ieee80211_local
*local
= sdata
->local
;
300 if (local
->ops
->bss_info_changed
)
301 local
->ops
->bss_info_changed(local_to_hw(local
),
303 &sdata
->vif
.bss_conf
,
309 * ~changed is just there to not do this at resume time
311 if (changed
& BSS_CHANGED_BEACON_INT
&& ~changed
) {
312 local
->hw
.conf
.beacon_int
= sdata
->vif
.bss_conf
.beacon_int
;
313 ieee80211_hw_config(local
,
314 _IEEE80211_CONF_CHANGE_BEACON_INTERVAL
);
318 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
320 sdata
->vif
.bss_conf
.use_cts_prot
= false;
321 sdata
->vif
.bss_conf
.use_short_preamble
= false;
322 sdata
->vif
.bss_conf
.use_short_slot
= false;
323 return BSS_CHANGED_ERP_CTS_PROT
|
324 BSS_CHANGED_ERP_PREAMBLE
|
325 BSS_CHANGED_ERP_SLOT
;
328 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
331 struct ieee80211_local
*local
= hw_to_local(hw
);
332 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
335 skb
->dev
= local
->mdev
;
336 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
337 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
338 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
339 tmp
= skb_queue_len(&local
->skb_queue
) +
340 skb_queue_len(&local
->skb_queue_unreliable
);
341 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
342 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
343 dev_kfree_skb_irq(skb
);
345 I802_DEBUG_INC(local
->tx_status_drop
);
347 tasklet_schedule(&local
->tasklet
);
349 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
351 static void ieee80211_tasklet_handler(unsigned long data
)
353 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
355 struct ieee80211_rx_status rx_status
;
356 struct ieee80211_ra_tid
*ra_tid
;
358 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
359 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
360 switch (skb
->pkt_type
) {
361 case IEEE80211_RX_MSG
:
362 /* status is in skb->cb */
363 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
364 /* Clear skb->pkt_type in order to not confuse kernel
367 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
369 case IEEE80211_TX_STATUS_MSG
:
371 ieee80211_tx_status(local_to_hw(local
), skb
);
373 case IEEE80211_DELBA_MSG
:
374 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
375 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
376 ra_tid
->ra
, ra_tid
->tid
);
379 case IEEE80211_ADDBA_MSG
:
380 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
381 ieee80211_start_tx_ba_cb(local_to_hw(local
),
382 ra_tid
->ra
, ra_tid
->tid
);
386 WARN(1, "mac80211: Packet is of unknown type %d\n",
394 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
395 * make a prepared TX frame (one that has been given to hw) to look like brand
396 * new IEEE 802.11 frame that is ready to go through TX processing again.
398 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
399 struct ieee80211_key
*key
,
402 unsigned int hdrlen
, iv_len
, mic_len
;
403 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
405 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
410 switch (key
->conf
.alg
) {
413 mic_len
= WEP_ICV_LEN
;
416 iv_len
= TKIP_IV_LEN
;
417 mic_len
= TKIP_ICV_LEN
;
420 iv_len
= CCMP_HDR_LEN
;
421 mic_len
= CCMP_MIC_LEN
;
427 if (skb
->len
>= hdrlen
+ mic_len
&&
428 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
429 skb_trim(skb
, skb
->len
- mic_len
);
430 if (skb
->len
>= hdrlen
+ iv_len
) {
431 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
432 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
436 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
437 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
438 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
439 hdrlen
- IEEE80211_QOS_CTL_LEN
);
440 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
444 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
445 struct sta_info
*sta
,
448 sta
->tx_filtered_count
++;
451 * Clear the TX filter mask for this STA when sending the next
452 * packet. If the STA went to power save mode, this will happen
453 * when it wakes up for the next time.
455 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
458 * This code races in the following way:
460 * (1) STA sends frame indicating it will go to sleep and does so
461 * (2) hardware/firmware adds STA to filter list, passes frame up
462 * (3) hardware/firmware processes TX fifo and suppresses a frame
463 * (4) we get TX status before having processed the frame and
464 * knowing that the STA has gone to sleep.
466 * This is actually quite unlikely even when both those events are
467 * processed from interrupts coming in quickly after one another or
468 * even at the same time because we queue both TX status events and
469 * RX frames to be processed by a tasklet and process them in the
470 * same order that they were received or TX status last. Hence, there
471 * is no race as long as the frame RX is processed before the next TX
472 * status, which drivers can ensure, see below.
474 * Note that this can only happen if the hardware or firmware can
475 * actually add STAs to the filter list, if this is done by the
476 * driver in response to set_tim() (which will only reduce the race
477 * this whole filtering tries to solve, not completely solve it)
478 * this situation cannot happen.
480 * To completely solve this race drivers need to make sure that they
481 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
483 * (b) always process RX events before TX status events if ordering
484 * can be unknown, for example with different interrupt status
487 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
488 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
489 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
490 skb_queue_tail(&sta
->tx_filtered
, skb
);
494 if (!test_sta_flags(sta
, WLAN_STA_PS
) && !skb
->requeue
) {
495 /* Software retry the packet once */
497 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
502 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
504 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
505 "queue_len=%d PS=%d @%lu\n",
506 wiphy_name(local
->hw
.wiphy
),
507 skb_queue_len(&sta
->tx_filtered
),
508 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
513 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
515 struct sk_buff
*skb2
;
516 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
517 struct ieee80211_local
*local
= hw_to_local(hw
);
518 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
521 struct ieee80211_supported_band
*sband
;
522 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
523 struct ieee80211_sub_if_data
*sdata
;
524 struct net_device
*prev_dev
= NULL
;
525 struct sta_info
*sta
;
526 int retry_count
= -1, i
;
528 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
529 /* the HW cannot have attempted that rate */
530 if (i
>= hw
->max_rates
) {
531 info
->status
.rates
[i
].idx
= -1;
532 info
->status
.rates
[i
].count
= 0;
535 retry_count
+= info
->status
.rates
[i
].count
;
542 sband
= local
->hw
.wiphy
->bands
[info
->band
];
544 sta
= sta_info_get(local
, hdr
->addr1
);
547 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
548 test_sta_flags(sta
, WLAN_STA_PS
)) {
550 * The STA is in power save mode, so assume
551 * that this TX packet failed because of that.
553 ieee80211_handle_filtered_frame(local
, sta
, skb
);
558 fc
= hdr
->frame_control
;
560 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
561 (ieee80211_is_data_qos(fc
))) {
565 qc
= ieee80211_get_qos_ctl(hdr
);
567 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
568 & IEEE80211_SCTL_SEQ
);
569 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
573 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
574 ieee80211_handle_filtered_frame(local
, sta
, skb
);
578 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
579 sta
->tx_retry_failed
++;
580 sta
->tx_retry_count
+= retry_count
;
583 rate_control_tx_status(local
, sband
, sta
, skb
);
588 ieee80211_led_tx(local
, 0);
591 * Fragments are passed to low-level drivers as separate skbs, so these
592 * are actually fragments, not frames. Update frame counters only for
593 * the first fragment of the frame. */
595 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
596 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
598 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
600 local
->dot11TransmittedFrameCount
++;
601 if (is_multicast_ether_addr(hdr
->addr1
))
602 local
->dot11MulticastTransmittedFrameCount
++;
604 local
->dot11RetryCount
++;
606 local
->dot11MultipleRetryCount
++;
609 /* This counter shall be incremented for an acknowledged MPDU
610 * with an individual address in the address 1 field or an MPDU
611 * with a multicast address in the address 1 field of type Data
613 if (!is_multicast_ether_addr(hdr
->addr1
) ||
614 type
== IEEE80211_FTYPE_DATA
||
615 type
== IEEE80211_FTYPE_MGMT
)
616 local
->dot11TransmittedFragmentCount
++;
619 local
->dot11FailedCount
++;
622 /* this was a transmitted frame, but now we want to reuse it */
626 * This is a bit racy but we can avoid a lot of work
629 if (!local
->monitors
&& !local
->cooked_mntrs
) {
634 /* send frame to monitor interfaces now */
636 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
637 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
642 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
643 skb_push(skb
, sizeof(*rthdr
));
645 memset(rthdr
, 0, sizeof(*rthdr
));
646 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
647 rthdr
->hdr
.it_present
=
648 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
649 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
650 (1 << IEEE80211_RADIOTAP_RATE
));
652 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
653 !is_multicast_ether_addr(hdr
->addr1
))
654 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
657 * XXX: Once radiotap gets the bitmap reset thing the vendor
658 * extensions proposal contains, we can actually report
659 * the whole set of tries we did.
661 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
662 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
663 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
664 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
665 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
666 if (info
->status
.rates
[0].idx
>= 0 &&
667 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
668 rthdr
->rate
= sband
->bitrates
[
669 info
->status
.rates
[0].idx
].bitrate
/ 5;
671 /* for now report the total retry_count */
672 rthdr
->data_retries
= retry_count
;
674 /* XXX: is this sufficient for BPF? */
675 skb_set_mac_header(skb
, 0);
676 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
677 skb
->pkt_type
= PACKET_OTHERHOST
;
678 skb
->protocol
= htons(ETH_P_802_2
);
679 memset(skb
->cb
, 0, sizeof(skb
->cb
));
682 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
683 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
684 if (!netif_running(sdata
->dev
))
688 skb2
= skb_clone(skb
, GFP_ATOMIC
);
690 skb2
->dev
= prev_dev
;
695 prev_dev
= sdata
->dev
;
706 EXPORT_SYMBOL(ieee80211_tx_status
);
708 static void ieee80211_restart_work(struct work_struct
*work
)
710 struct ieee80211_local
*local
=
711 container_of(work
, struct ieee80211_local
, restart_work
);
714 ieee80211_reconfig(local
);
718 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
720 struct ieee80211_local
*local
= hw_to_local(hw
);
722 /* use this reason, __ieee80211_resume will unblock it */
723 ieee80211_stop_queues_by_reason(hw
,
724 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
726 schedule_work(&local
->restart_work
);
728 EXPORT_SYMBOL(ieee80211_restart_hw
);
730 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
731 const struct ieee80211_ops
*ops
)
733 struct ieee80211_local
*local
;
737 /* Ensure 32-byte alignment of our private data and hw private data.
738 * We use the wiphy priv data for both our ieee80211_local and for
739 * the driver's private data
741 * In memory it'll be like this:
743 * +-------------------------+
745 * +-------------------------+
746 * | struct ieee80211_local |
747 * +-------------------------+
748 * | driver's private data |
749 * +-------------------------+
752 priv_size
= ((sizeof(struct ieee80211_local
) +
753 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
756 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
761 wiphy
->privid
= mac80211_wiphy_privid
;
763 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
764 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
) -
765 sizeof(struct cfg80211_bss
);
767 local
= wiphy_priv(wiphy
);
769 local
->hw
.wiphy
= wiphy
;
771 local
->hw
.priv
= (char *)local
+
772 ((sizeof(struct ieee80211_local
) +
773 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
778 BUG_ON(!ops
->config
);
779 BUG_ON(!ops
->add_interface
);
780 BUG_ON(!ops
->remove_interface
);
781 BUG_ON(!ops
->configure_filter
);
784 /* set up some defaults */
785 local
->hw
.queues
= 1;
786 local
->hw
.max_rates
= 1;
787 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
788 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
789 local
->hw
.conf
.radio_enabled
= true;
790 local
->user_power_level
= -1;
792 INIT_LIST_HEAD(&local
->interfaces
);
793 mutex_init(&local
->iflist_mtx
);
794 mutex_init(&local
->scan_mtx
);
796 spin_lock_init(&local
->key_lock
);
798 spin_lock_init(&local
->queue_stop_reason_lock
);
800 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
802 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
804 INIT_WORK(&local
->dynamic_ps_enable_work
,
805 ieee80211_dynamic_ps_enable_work
);
806 INIT_WORK(&local
->dynamic_ps_disable_work
,
807 ieee80211_dynamic_ps_disable_work
);
808 setup_timer(&local
->dynamic_ps_timer
,
809 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
811 sta_info_init(local
);
813 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++)
814 skb_queue_head_init(&local
->pending
[i
]);
815 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
816 (unsigned long)local
);
817 tasklet_disable(&local
->tx_pending_tasklet
);
819 tasklet_init(&local
->tasklet
,
820 ieee80211_tasklet_handler
,
821 (unsigned long) local
);
822 tasklet_disable(&local
->tasklet
);
824 skb_queue_head_init(&local
->skb_queue
);
825 skb_queue_head_init(&local
->skb_queue_unreliable
);
827 spin_lock_init(&local
->ampdu_lock
);
829 return local_to_hw(local
);
831 EXPORT_SYMBOL(ieee80211_alloc_hw
);
833 static const struct net_device_ops ieee80211_master_ops
= {
834 .ndo_start_xmit
= ieee80211_master_start_xmit
,
835 .ndo_open
= ieee80211_master_open
,
836 .ndo_stop
= ieee80211_master_stop
,
837 .ndo_set_multicast_list
= ieee80211_master_set_multicast_list
,
838 .ndo_select_queue
= ieee80211_select_queue
,
841 static void ieee80211_master_setup(struct net_device
*mdev
)
843 mdev
->type
= ARPHRD_IEEE80211
;
844 mdev
->netdev_ops
= &ieee80211_master_ops
;
845 mdev
->header_ops
= &ieee80211_header_ops
;
846 mdev
->tx_queue_len
= 1000;
847 mdev
->addr_len
= ETH_ALEN
;
850 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
852 struct ieee80211_local
*local
= hw_to_local(hw
);
854 enum ieee80211_band band
;
855 struct net_device
*mdev
;
856 struct ieee80211_master_priv
*mpriv
;
857 int channels
, i
, j
, max_bitrates
;
859 static const u32 cipher_suites
[] = {
860 WLAN_CIPHER_SUITE_WEP40
,
861 WLAN_CIPHER_SUITE_WEP104
,
862 WLAN_CIPHER_SUITE_TKIP
,
863 WLAN_CIPHER_SUITE_CCMP
,
865 /* keep last -- depends on hw flags! */
866 WLAN_CIPHER_SUITE_AES_CMAC
870 * generic code guarantees at least one band,
871 * set this very early because much code assumes
872 * that hw.conf.channel is assigned
877 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
878 struct ieee80211_supported_band
*sband
;
880 sband
= local
->hw
.wiphy
->bands
[band
];
883 if (!local
->oper_channel
) {
884 /* init channel we're on */
885 local
->hw
.conf
.channel
=
886 local
->oper_channel
=
887 local
->scan_channel
= &sband
->channels
[0];
889 channels
+= sband
->n_channels
;
891 if (max_bitrates
< sband
->n_bitrates
)
892 max_bitrates
= sband
->n_bitrates
;
893 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
896 local
->int_scan_req
.n_channels
= channels
;
897 local
->int_scan_req
.channels
= kzalloc(sizeof(void *) * channels
, GFP_KERNEL
);
898 if (!local
->int_scan_req
.channels
)
901 /* if low-level driver supports AP, we also support VLAN */
902 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
903 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
905 /* mac80211 always supports monitor */
906 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
908 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
909 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
910 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
911 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
914 * Calculate scan IE length -- we need this to alloc
915 * memory and to subtract from the driver limit. It
916 * includes the (extended) supported rates and HT
917 * information -- SSID is the driver's responsibility.
919 local
->scan_ies_len
= 4 + max_bitrates
; /* (ext) supp rates */
921 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
923 if (!local
->ops
->hw_scan
) {
924 /* For hw_scan, driver needs to set these up. */
925 local
->hw
.wiphy
->max_scan_ssids
= 4;
926 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
930 * If the driver supports any scan IEs, then assume the
931 * limit includes the IEs mac80211 will add, otherwise
932 * leave it at zero and let the driver sort it out; we
933 * still pass our IEs to the driver but userspace will
934 * not be allowed to in that case.
936 if (local
->hw
.wiphy
->max_scan_ie_len
)
937 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
939 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
940 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
941 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
942 local
->hw
.wiphy
->n_cipher_suites
--;
944 result
= wiphy_register(local
->hw
.wiphy
);
946 goto fail_wiphy_register
;
949 * We use the number of queues for feature tests (QoS, HT) internally
950 * so restrict them appropriately.
952 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
953 hw
->queues
= IEEE80211_MAX_QUEUES
;
955 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_master_priv
),
956 "wmaster%d", ieee80211_master_setup
,
959 goto fail_mdev_alloc
;
961 mpriv
= netdev_priv(mdev
);
962 mpriv
->local
= local
;
965 local
->hw
.workqueue
=
966 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
967 if (!local
->hw
.workqueue
) {
973 * The hardware needs headroom for sending the frame,
974 * and we need some headroom for passing the frame to monitor
975 * interfaces, but never both at the same time.
977 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
978 sizeof(struct ieee80211_tx_status_rtap_hdr
));
980 debugfs_hw_add(local
);
982 if (local
->hw
.max_listen_interval
== 0)
983 local
->hw
.max_listen_interval
= 1;
985 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
987 result
= sta_info_start(local
);
991 result
= ieee80211_wep_init(local
);
993 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
994 wiphy_name(local
->hw
.wiphy
), result
);
999 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1003 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1004 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1005 local
->mdev
->features
|= NETIF_F_NETNS_LOCAL
;
1007 result
= register_netdevice(local
->mdev
);
1011 result
= ieee80211_init_rate_ctrl_alg(local
,
1012 hw
->rate_control_algorithm
);
1014 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1015 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1019 /* add one default STA interface if supported */
1020 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
1021 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
1022 NL80211_IFTYPE_STATION
, NULL
);
1024 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1025 wiphy_name(local
->hw
.wiphy
));
1030 ieee80211_led_init(local
);
1032 /* alloc internal scan request */
1034 local
->int_scan_req
.ssids
= &local
->scan_ssid
;
1035 local
->int_scan_req
.n_ssids
= 1;
1036 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1037 if (!hw
->wiphy
->bands
[band
])
1039 for (j
= 0; j
< hw
->wiphy
->bands
[band
]->n_channels
; j
++) {
1040 local
->int_scan_req
.channels
[i
] =
1041 &hw
->wiphy
->bands
[band
]->channels
[j
];
1046 local
->network_latency_notifier
.notifier_call
=
1047 ieee80211_max_network_latency
;
1048 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
1049 &local
->network_latency_notifier
);
1059 ieee80211_led_exit(local
);
1060 ieee80211_remove_interfaces(local
);
1062 unregister_netdevice(local
->mdev
);
1066 ieee80211_wep_free(local
);
1068 sta_info_stop(local
);
1070 debugfs_hw_del(local
);
1071 destroy_workqueue(local
->hw
.workqueue
);
1074 free_netdev(local
->mdev
);
1076 wiphy_unregister(local
->hw
.wiphy
);
1077 fail_wiphy_register
:
1078 kfree(local
->int_scan_req
.channels
);
1081 EXPORT_SYMBOL(ieee80211_register_hw
);
1083 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1085 struct ieee80211_local
*local
= hw_to_local(hw
);
1087 tasklet_kill(&local
->tx_pending_tasklet
);
1088 tasklet_kill(&local
->tasklet
);
1090 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1091 &local
->network_latency_notifier
);
1096 * At this point, interface list manipulations are fine
1097 * because the driver cannot be handing us frames any
1098 * more and the tasklet is killed.
1101 /* First, we remove all virtual interfaces. */
1102 ieee80211_remove_interfaces(local
);
1104 /* then, finally, remove the master interface */
1105 unregister_netdevice(local
->mdev
);
1109 ieee80211_clear_tx_pending(local
);
1110 sta_info_stop(local
);
1111 rate_control_deinitialize(local
);
1112 debugfs_hw_del(local
);
1114 if (skb_queue_len(&local
->skb_queue
)
1115 || skb_queue_len(&local
->skb_queue_unreliable
))
1116 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1117 wiphy_name(local
->hw
.wiphy
));
1118 skb_queue_purge(&local
->skb_queue
);
1119 skb_queue_purge(&local
->skb_queue_unreliable
);
1121 destroy_workqueue(local
->hw
.workqueue
);
1122 wiphy_unregister(local
->hw
.wiphy
);
1123 ieee80211_wep_free(local
);
1124 ieee80211_led_exit(local
);
1125 free_netdev(local
->mdev
);
1126 kfree(local
->int_scan_req
.channels
);
1128 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1130 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1132 struct ieee80211_local
*local
= hw_to_local(hw
);
1134 mutex_destroy(&local
->iflist_mtx
);
1135 mutex_destroy(&local
->scan_mtx
);
1137 wiphy_free(local
->hw
.wiphy
);
1139 EXPORT_SYMBOL(ieee80211_free_hw
);
1141 static int __init
ieee80211_init(void)
1143 struct sk_buff
*skb
;
1146 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1147 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1148 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1150 ret
= rc80211_minstrel_init();
1154 ret
= rc80211_pid_init();
1158 ieee80211_debugfs_netdev_init();
1163 static void __exit
ieee80211_exit(void)
1166 rc80211_minstrel_exit();
1169 * For key todo, it'll be empty by now but the work
1170 * might still be scheduled.
1172 flush_scheduled_work();
1177 ieee80211_debugfs_netdev_exit();
1181 subsys_initcall(ieee80211_init
);
1182 module_exit(ieee80211_exit
);
1184 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1185 MODULE_LICENSE("GPL");