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 <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr
{
43 struct ieee80211_radiotap_header hdr
;
48 } __attribute__ ((packed
));
51 /* must be called under mdev tx lock */
52 void ieee80211_configure_filter(struct ieee80211_local
*local
)
54 unsigned int changed_flags
;
55 unsigned int new_flags
= 0;
57 if (atomic_read(&local
->iff_promiscs
))
58 new_flags
|= FIF_PROMISC_IN_BSS
;
60 if (atomic_read(&local
->iff_allmultis
))
61 new_flags
|= FIF_ALLMULTI
;
64 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
66 if (local
->fif_fcsfail
)
67 new_flags
|= FIF_FCSFAIL
;
69 if (local
->fif_plcpfail
)
70 new_flags
|= FIF_PLCPFAIL
;
72 if (local
->fif_control
)
73 new_flags
|= FIF_CONTROL
;
75 if (local
->fif_other_bss
)
76 new_flags
|= FIF_OTHER_BSS
;
78 changed_flags
= local
->filter_flags
^ new_flags
;
83 local
->ops
->configure_filter(local_to_hw(local
),
84 changed_flags
, &new_flags
,
85 local
->mdev
->mc_count
,
86 local
->mdev
->mc_list
);
88 WARN_ON(new_flags
& (1<<31));
90 local
->filter_flags
= new_flags
& ~(1<<31);
93 /* master interface */
95 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
97 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
101 static const struct header_ops ieee80211_header_ops
= {
102 .create
= eth_header
,
103 .parse
= header_parse_80211
,
104 .rebuild
= eth_rebuild_header
,
105 .cache
= eth_header_cache
,
106 .cache_update
= eth_header_cache_update
,
109 static int ieee80211_master_open(struct net_device
*dev
)
111 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
112 struct ieee80211_local
*local
= mpriv
->local
;
113 struct ieee80211_sub_if_data
*sdata
;
114 int res
= -EOPNOTSUPP
;
116 /* we hold the RTNL here so can safely walk the list */
117 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
118 if (netif_running(sdata
->dev
)) {
127 netif_tx_start_all_queues(local
->mdev
);
132 static int ieee80211_master_stop(struct net_device
*dev
)
134 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
135 struct ieee80211_local
*local
= mpriv
->local
;
136 struct ieee80211_sub_if_data
*sdata
;
138 /* we hold the RTNL here so can safely walk the list */
139 list_for_each_entry(sdata
, &local
->interfaces
, list
)
140 if (netif_running(sdata
->dev
))
141 dev_close(sdata
->dev
);
146 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
148 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
149 struct ieee80211_local
*local
= mpriv
->local
;
151 ieee80211_configure_filter(local
);
154 /* everything else */
156 int ieee80211_if_config(struct ieee80211_sub_if_data
*sdata
, u32 changed
)
158 struct ieee80211_local
*local
= sdata
->local
;
159 struct ieee80211_if_conf conf
;
161 if (WARN_ON(!netif_running(sdata
->dev
)))
164 memset(&conf
, 0, sizeof(conf
));
166 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
167 conf
.bssid
= sdata
->u
.mgd
.bssid
;
168 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
169 conf
.bssid
= sdata
->u
.ibss
.bssid
;
170 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
171 conf
.bssid
= sdata
->dev
->dev_addr
;
172 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
173 static const u8 zero
[ETH_ALEN
] = { 0 };
180 if (!local
->ops
->config_interface
)
183 switch (sdata
->vif
.type
) {
184 case NL80211_IFTYPE_AP
:
185 case NL80211_IFTYPE_ADHOC
:
186 case NL80211_IFTYPE_MESH_POINT
:
189 /* do not warn to simplify caller in scan.c */
190 changed
&= ~IEEE80211_IFCC_BEACON_ENABLED
;
191 if (WARN_ON(changed
& IEEE80211_IFCC_BEACON
))
193 changed
&= ~IEEE80211_IFCC_BEACON
;
197 if (changed
& IEEE80211_IFCC_BEACON_ENABLED
) {
198 if (local
->sw_scanning
) {
199 conf
.enable_beacon
= false;
202 * Beacon should be enabled, but AP mode must
203 * check whether there is a beacon configured.
205 switch (sdata
->vif
.type
) {
206 case NL80211_IFTYPE_AP
:
208 !!rcu_dereference(sdata
->u
.ap
.beacon
);
210 case NL80211_IFTYPE_ADHOC
:
211 conf
.enable_beacon
= !!sdata
->u
.ibss
.probe_resp
;
213 case NL80211_IFTYPE_MESH_POINT
:
214 conf
.enable_beacon
= true;
224 conf
.changed
= changed
;
226 return local
->ops
->config_interface(local_to_hw(local
),
230 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
232 struct ieee80211_channel
*chan
;
235 enum nl80211_channel_type channel_type
;
239 if (local
->sw_scanning
) {
240 chan
= local
->scan_channel
;
241 channel_type
= NL80211_CHAN_NO_HT
;
243 chan
= local
->oper_channel
;
244 channel_type
= local
->oper_channel_type
;
247 if (chan
!= local
->hw
.conf
.channel
||
248 channel_type
!= local
->hw
.conf
.channel_type
) {
249 local
->hw
.conf
.channel
= chan
;
250 local
->hw
.conf
.channel_type
= channel_type
;
251 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
254 if (local
->sw_scanning
)
255 power
= chan
->max_power
;
257 power
= local
->power_constr_level
?
258 (chan
->max_power
- local
->power_constr_level
) :
261 if (local
->user_power_level
)
262 power
= min(power
, local
->user_power_level
);
264 if (local
->hw
.conf
.power_level
!= power
) {
265 changed
|= IEEE80211_CONF_CHANGE_POWER
;
266 local
->hw
.conf
.power_level
= power
;
269 if (changed
&& local
->open_count
) {
270 ret
= local
->ops
->config(local_to_hw(local
), changed
);
273 * HW reconfiguration should never fail, the driver has told
274 * us what it can support so it should live up to that promise.
277 * rfkill is not integrated with mac80211 and a
278 * configuration command can thus fail if hardware rfkill
281 * FIXME: integrate rfkill with mac80211 and then add this
291 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
294 struct ieee80211_local
*local
= sdata
->local
;
296 if (WARN_ON(sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
302 if (local
->ops
->bss_info_changed
)
303 local
->ops
->bss_info_changed(local_to_hw(local
),
305 &sdata
->vif
.bss_conf
,
309 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
311 sdata
->vif
.bss_conf
.use_cts_prot
= false;
312 sdata
->vif
.bss_conf
.use_short_preamble
= false;
313 sdata
->vif
.bss_conf
.use_short_slot
= false;
314 return BSS_CHANGED_ERP_CTS_PROT
|
315 BSS_CHANGED_ERP_PREAMBLE
|
316 BSS_CHANGED_ERP_SLOT
;
319 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
322 struct ieee80211_local
*local
= hw_to_local(hw
);
323 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
326 skb
->dev
= local
->mdev
;
327 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
328 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
329 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
330 tmp
= skb_queue_len(&local
->skb_queue
) +
331 skb_queue_len(&local
->skb_queue_unreliable
);
332 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
333 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
334 dev_kfree_skb_irq(skb
);
336 I802_DEBUG_INC(local
->tx_status_drop
);
338 tasklet_schedule(&local
->tasklet
);
340 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
342 static void ieee80211_tasklet_handler(unsigned long data
)
344 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
346 struct ieee80211_rx_status rx_status
;
347 struct ieee80211_ra_tid
*ra_tid
;
349 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
350 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
351 switch (skb
->pkt_type
) {
352 case IEEE80211_RX_MSG
:
353 /* status is in skb->cb */
354 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
355 /* Clear skb->pkt_type in order to not confuse kernel
358 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
360 case IEEE80211_TX_STATUS_MSG
:
362 ieee80211_tx_status(local_to_hw(local
), skb
);
364 case IEEE80211_DELBA_MSG
:
365 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
366 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
367 ra_tid
->ra
, ra_tid
->tid
);
370 case IEEE80211_ADDBA_MSG
:
371 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
372 ieee80211_start_tx_ba_cb(local_to_hw(local
),
373 ra_tid
->ra
, ra_tid
->tid
);
377 WARN(1, "mac80211: Packet is of unknown type %d\n",
385 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
386 * make a prepared TX frame (one that has been given to hw) to look like brand
387 * new IEEE 802.11 frame that is ready to go through TX processing again.
389 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
390 struct ieee80211_key
*key
,
393 unsigned int hdrlen
, iv_len
, mic_len
;
394 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
396 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
401 switch (key
->conf
.alg
) {
404 mic_len
= WEP_ICV_LEN
;
407 iv_len
= TKIP_IV_LEN
;
408 mic_len
= TKIP_ICV_LEN
;
411 iv_len
= CCMP_HDR_LEN
;
412 mic_len
= CCMP_MIC_LEN
;
418 if (skb
->len
>= hdrlen
+ mic_len
&&
419 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
420 skb_trim(skb
, skb
->len
- mic_len
);
421 if (skb
->len
>= hdrlen
+ iv_len
) {
422 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
423 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
427 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
428 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
429 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
430 hdrlen
- IEEE80211_QOS_CTL_LEN
);
431 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
435 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
436 struct sta_info
*sta
,
439 sta
->tx_filtered_count
++;
442 * Clear the TX filter mask for this STA when sending the next
443 * packet. If the STA went to power save mode, this will happen
444 * when it wakes up for the next time.
446 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
449 * This code races in the following way:
451 * (1) STA sends frame indicating it will go to sleep and does so
452 * (2) hardware/firmware adds STA to filter list, passes frame up
453 * (3) hardware/firmware processes TX fifo and suppresses a frame
454 * (4) we get TX status before having processed the frame and
455 * knowing that the STA has gone to sleep.
457 * This is actually quite unlikely even when both those events are
458 * processed from interrupts coming in quickly after one another or
459 * even at the same time because we queue both TX status events and
460 * RX frames to be processed by a tasklet and process them in the
461 * same order that they were received or TX status last. Hence, there
462 * is no race as long as the frame RX is processed before the next TX
463 * status, which drivers can ensure, see below.
465 * Note that this can only happen if the hardware or firmware can
466 * actually add STAs to the filter list, if this is done by the
467 * driver in response to set_tim() (which will only reduce the race
468 * this whole filtering tries to solve, not completely solve it)
469 * this situation cannot happen.
471 * To completely solve this race drivers need to make sure that they
472 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
474 * (b) always process RX events before TX status events if ordering
475 * can be unknown, for example with different interrupt status
478 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
479 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
480 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
481 skb_queue_tail(&sta
->tx_filtered
, skb
);
485 if (!test_sta_flags(sta
, WLAN_STA_PS
) && !skb
->requeue
) {
486 /* Software retry the packet once */
488 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
493 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
495 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
496 "queue_len=%d PS=%d @%lu\n",
497 wiphy_name(local
->hw
.wiphy
),
498 skb_queue_len(&sta
->tx_filtered
),
499 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
504 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
506 struct sk_buff
*skb2
;
507 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
508 struct ieee80211_local
*local
= hw_to_local(hw
);
509 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
512 struct ieee80211_supported_band
*sband
;
513 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
514 struct ieee80211_sub_if_data
*sdata
;
515 struct net_device
*prev_dev
= NULL
;
516 struct sta_info
*sta
;
517 int retry_count
= -1, i
;
519 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
520 /* the HW cannot have attempted that rate */
521 if (i
>= hw
->max_rates
) {
522 info
->status
.rates
[i
].idx
= -1;
523 info
->status
.rates
[i
].count
= 0;
526 retry_count
+= info
->status
.rates
[i
].count
;
533 sband
= local
->hw
.wiphy
->bands
[info
->band
];
535 sta
= sta_info_get(local
, hdr
->addr1
);
538 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
539 test_sta_flags(sta
, WLAN_STA_PS
)) {
541 * The STA is in power save mode, so assume
542 * that this TX packet failed because of that.
544 ieee80211_handle_filtered_frame(local
, sta
, skb
);
549 fc
= hdr
->frame_control
;
551 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
552 (ieee80211_is_data_qos(fc
))) {
556 qc
= ieee80211_get_qos_ctl(hdr
);
558 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
559 & IEEE80211_SCTL_SEQ
);
560 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
564 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
565 ieee80211_handle_filtered_frame(local
, sta
, skb
);
569 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
570 sta
->tx_retry_failed
++;
571 sta
->tx_retry_count
+= retry_count
;
574 rate_control_tx_status(local
, sband
, sta
, skb
);
579 ieee80211_led_tx(local
, 0);
582 * Fragments are passed to low-level drivers as separate skbs, so these
583 * are actually fragments, not frames. Update frame counters only for
584 * the first fragment of the frame. */
586 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
587 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
589 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
591 local
->dot11TransmittedFrameCount
++;
592 if (is_multicast_ether_addr(hdr
->addr1
))
593 local
->dot11MulticastTransmittedFrameCount
++;
595 local
->dot11RetryCount
++;
597 local
->dot11MultipleRetryCount
++;
600 /* This counter shall be incremented for an acknowledged MPDU
601 * with an individual address in the address 1 field or an MPDU
602 * with a multicast address in the address 1 field of type Data
604 if (!is_multicast_ether_addr(hdr
->addr1
) ||
605 type
== IEEE80211_FTYPE_DATA
||
606 type
== IEEE80211_FTYPE_MGMT
)
607 local
->dot11TransmittedFragmentCount
++;
610 local
->dot11FailedCount
++;
613 /* this was a transmitted frame, but now we want to reuse it */
617 * This is a bit racy but we can avoid a lot of work
620 if (!local
->monitors
&& !local
->cooked_mntrs
) {
625 /* send frame to monitor interfaces now */
627 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
628 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
633 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
634 skb_push(skb
, sizeof(*rthdr
));
636 memset(rthdr
, 0, sizeof(*rthdr
));
637 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
638 rthdr
->hdr
.it_present
=
639 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
640 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
641 (1 << IEEE80211_RADIOTAP_RATE
));
643 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
644 !is_multicast_ether_addr(hdr
->addr1
))
645 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
648 * XXX: Once radiotap gets the bitmap reset thing the vendor
649 * extensions proposal contains, we can actually report
650 * the whole set of tries we did.
652 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
653 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
654 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
655 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
656 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
657 if (info
->status
.rates
[0].idx
>= 0 &&
658 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
659 rthdr
->rate
= sband
->bitrates
[
660 info
->status
.rates
[0].idx
].bitrate
/ 5;
662 /* for now report the total retry_count */
663 rthdr
->data_retries
= retry_count
;
665 /* XXX: is this sufficient for BPF? */
666 skb_set_mac_header(skb
, 0);
667 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
668 skb
->pkt_type
= PACKET_OTHERHOST
;
669 skb
->protocol
= htons(ETH_P_802_2
);
670 memset(skb
->cb
, 0, sizeof(skb
->cb
));
673 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
674 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
675 if (!netif_running(sdata
->dev
))
679 skb2
= skb_clone(skb
, GFP_ATOMIC
);
681 skb2
->dev
= prev_dev
;
686 prev_dev
= sdata
->dev
;
697 EXPORT_SYMBOL(ieee80211_tx_status
);
699 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
700 const struct ieee80211_ops
*ops
)
702 struct ieee80211_local
*local
;
706 /* Ensure 32-byte alignment of our private data and hw private data.
707 * We use the wiphy priv data for both our ieee80211_local and for
708 * the driver's private data
710 * In memory it'll be like this:
712 * +-------------------------+
714 * +-------------------------+
715 * | struct ieee80211_local |
716 * +-------------------------+
717 * | driver's private data |
718 * +-------------------------+
721 priv_size
= ((sizeof(struct ieee80211_local
) +
722 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
725 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
730 wiphy
->privid
= mac80211_wiphy_privid
;
731 wiphy
->max_scan_ssids
= 4;
732 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
733 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
) -
734 sizeof(struct cfg80211_bss
);
736 local
= wiphy_priv(wiphy
);
737 local
->hw
.wiphy
= wiphy
;
739 local
->hw
.priv
= (char *)local
+
740 ((sizeof(struct ieee80211_local
) +
741 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
746 BUG_ON(!ops
->config
);
747 BUG_ON(!ops
->add_interface
);
748 BUG_ON(!ops
->remove_interface
);
749 BUG_ON(!ops
->configure_filter
);
752 /* set up some defaults */
753 local
->hw
.queues
= 1;
754 local
->hw
.max_rates
= 1;
755 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
756 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
757 local
->hw
.conf
.long_frame_max_tx_count
= 4;
758 local
->hw
.conf
.short_frame_max_tx_count
= 7;
759 local
->hw
.conf
.radio_enabled
= true;
761 INIT_LIST_HEAD(&local
->interfaces
);
762 mutex_init(&local
->iflist_mtx
);
764 spin_lock_init(&local
->key_lock
);
766 spin_lock_init(&local
->queue_stop_reason_lock
);
768 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
770 INIT_WORK(&local
->dynamic_ps_enable_work
,
771 ieee80211_dynamic_ps_enable_work
);
772 INIT_WORK(&local
->dynamic_ps_disable_work
,
773 ieee80211_dynamic_ps_disable_work
);
774 setup_timer(&local
->dynamic_ps_timer
,
775 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
777 sta_info_init(local
);
779 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++)
780 skb_queue_head_init(&local
->pending
[i
]);
781 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
782 (unsigned long)local
);
783 tasklet_disable(&local
->tx_pending_tasklet
);
785 tasklet_init(&local
->tasklet
,
786 ieee80211_tasklet_handler
,
787 (unsigned long) local
);
788 tasklet_disable(&local
->tasklet
);
790 skb_queue_head_init(&local
->skb_queue
);
791 skb_queue_head_init(&local
->skb_queue_unreliable
);
793 spin_lock_init(&local
->ampdu_lock
);
795 return local_to_hw(local
);
797 EXPORT_SYMBOL(ieee80211_alloc_hw
);
799 static const struct net_device_ops ieee80211_master_ops
= {
800 .ndo_start_xmit
= ieee80211_master_start_xmit
,
801 .ndo_open
= ieee80211_master_open
,
802 .ndo_stop
= ieee80211_master_stop
,
803 .ndo_set_multicast_list
= ieee80211_master_set_multicast_list
,
804 .ndo_select_queue
= ieee80211_select_queue
,
807 static void ieee80211_master_setup(struct net_device
*mdev
)
809 mdev
->type
= ARPHRD_IEEE80211
;
810 mdev
->netdev_ops
= &ieee80211_master_ops
;
811 mdev
->header_ops
= &ieee80211_header_ops
;
812 mdev
->tx_queue_len
= 1000;
813 mdev
->addr_len
= ETH_ALEN
;
816 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
818 struct ieee80211_local
*local
= hw_to_local(hw
);
820 enum ieee80211_band band
;
821 struct net_device
*mdev
;
822 struct ieee80211_master_priv
*mpriv
;
826 * generic code guarantees at least one band,
827 * set this very early because much code assumes
828 * that hw.conf.channel is assigned
831 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
832 struct ieee80211_supported_band
*sband
;
834 sband
= local
->hw
.wiphy
->bands
[band
];
835 if (sband
&& !local
->oper_channel
) {
836 /* init channel we're on */
837 local
->hw
.conf
.channel
=
838 local
->oper_channel
=
839 local
->scan_channel
= &sband
->channels
[0];
842 channels
+= sband
->n_channels
;
845 local
->int_scan_req
.n_channels
= channels
;
846 local
->int_scan_req
.channels
= kzalloc(sizeof(void *) * channels
, GFP_KERNEL
);
847 if (!local
->int_scan_req
.channels
)
850 /* if low-level driver supports AP, we also support VLAN */
851 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
852 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
854 /* mac80211 always supports monitor */
855 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
857 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
858 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
859 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
860 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
862 result
= wiphy_register(local
->hw
.wiphy
);
864 goto fail_wiphy_register
;
867 * We use the number of queues for feature tests (QoS, HT) internally
868 * so restrict them appropriately.
870 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
871 hw
->queues
= IEEE80211_MAX_QUEUES
;
873 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_master_priv
),
874 "wmaster%d", ieee80211_master_setup
,
877 goto fail_mdev_alloc
;
879 mpriv
= netdev_priv(mdev
);
880 mpriv
->local
= local
;
883 local
->hw
.workqueue
=
884 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
885 if (!local
->hw
.workqueue
) {
891 * The hardware needs headroom for sending the frame,
892 * and we need some headroom for passing the frame to monitor
893 * interfaces, but never both at the same time.
895 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
896 sizeof(struct ieee80211_tx_status_rtap_hdr
));
898 debugfs_hw_add(local
);
900 if (local
->hw
.conf
.beacon_int
< 10)
901 local
->hw
.conf
.beacon_int
= 100;
903 if (local
->hw
.max_listen_interval
== 0)
904 local
->hw
.max_listen_interval
= 1;
906 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
908 result
= sta_info_start(local
);
913 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
917 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
918 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
919 local
->mdev
->features
|= NETIF_F_NETNS_LOCAL
;
921 result
= register_netdevice(local
->mdev
);
925 result
= ieee80211_init_rate_ctrl_alg(local
,
926 hw
->rate_control_algorithm
);
928 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
929 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
933 result
= ieee80211_wep_init(local
);
936 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
937 wiphy_name(local
->hw
.wiphy
), result
);
941 /* add one default STA interface if supported */
942 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
943 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
944 NL80211_IFTYPE_STATION
, NULL
);
946 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
947 wiphy_name(local
->hw
.wiphy
));
952 ieee80211_led_init(local
);
954 /* alloc internal scan request */
956 local
->int_scan_req
.ssids
= &local
->scan_ssid
;
957 local
->int_scan_req
.n_ssids
= 1;
958 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
959 if (!hw
->wiphy
->bands
[band
])
961 for (j
= 0; j
< hw
->wiphy
->bands
[band
]->n_channels
; j
++) {
962 local
->int_scan_req
.channels
[i
] =
963 &hw
->wiphy
->bands
[band
]->channels
[j
];
971 rate_control_deinitialize(local
);
973 unregister_netdevice(local
->mdev
);
977 sta_info_stop(local
);
979 debugfs_hw_del(local
);
980 destroy_workqueue(local
->hw
.workqueue
);
983 free_netdev(local
->mdev
);
985 wiphy_unregister(local
->hw
.wiphy
);
987 kfree(local
->int_scan_req
.channels
);
990 EXPORT_SYMBOL(ieee80211_register_hw
);
992 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
994 struct ieee80211_local
*local
= hw_to_local(hw
);
996 tasklet_kill(&local
->tx_pending_tasklet
);
997 tasklet_kill(&local
->tasklet
);
1002 * At this point, interface list manipulations are fine
1003 * because the driver cannot be handing us frames any
1004 * more and the tasklet is killed.
1007 /* First, we remove all virtual interfaces. */
1008 ieee80211_remove_interfaces(local
);
1010 /* then, finally, remove the master interface */
1011 unregister_netdevice(local
->mdev
);
1015 ieee80211_clear_tx_pending(local
);
1016 sta_info_stop(local
);
1017 rate_control_deinitialize(local
);
1018 debugfs_hw_del(local
);
1020 if (skb_queue_len(&local
->skb_queue
)
1021 || skb_queue_len(&local
->skb_queue_unreliable
))
1022 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1023 wiphy_name(local
->hw
.wiphy
));
1024 skb_queue_purge(&local
->skb_queue
);
1025 skb_queue_purge(&local
->skb_queue_unreliable
);
1027 destroy_workqueue(local
->hw
.workqueue
);
1028 wiphy_unregister(local
->hw
.wiphy
);
1029 ieee80211_wep_free(local
);
1030 ieee80211_led_exit(local
);
1031 free_netdev(local
->mdev
);
1032 kfree(local
->int_scan_req
.channels
);
1034 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1036 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1038 struct ieee80211_local
*local
= hw_to_local(hw
);
1040 mutex_destroy(&local
->iflist_mtx
);
1042 wiphy_free(local
->hw
.wiphy
);
1044 EXPORT_SYMBOL(ieee80211_free_hw
);
1046 static int __init
ieee80211_init(void)
1048 struct sk_buff
*skb
;
1051 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1052 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1053 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1055 ret
= rc80211_minstrel_init();
1059 ret
= rc80211_pid_init();
1063 ieee80211_debugfs_netdev_init();
1068 static void __exit
ieee80211_exit(void)
1071 rc80211_minstrel_exit();
1074 * For key todo, it'll be empty by now but the work
1075 * might still be scheduled.
1077 flush_scheduled_work();
1082 ieee80211_debugfs_netdev_exit();
1086 subsys_initcall(ieee80211_init
);
1087 module_exit(ieee80211_exit
);
1089 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1090 MODULE_LICENSE("GPL");