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 if (WARN_ON(sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
167 if (!local
->ops
->config_interface
)
170 memset(&conf
, 0, sizeof(conf
));
172 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
173 conf
.bssid
= sdata
->u
.mgd
.bssid
;
174 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
175 conf
.bssid
= sdata
->u
.ibss
.bssid
;
176 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
177 conf
.bssid
= sdata
->dev
->dev_addr
;
178 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
179 static const u8 zero
[ETH_ALEN
] = { 0 };
186 switch (sdata
->vif
.type
) {
187 case NL80211_IFTYPE_AP
:
188 case NL80211_IFTYPE_ADHOC
:
189 case NL80211_IFTYPE_MESH_POINT
:
192 /* do not warn to simplify caller in scan.c */
193 changed
&= ~IEEE80211_IFCC_BEACON_ENABLED
;
194 if (WARN_ON(changed
& IEEE80211_IFCC_BEACON
))
196 changed
&= ~IEEE80211_IFCC_BEACON
;
200 if (changed
& IEEE80211_IFCC_BEACON_ENABLED
) {
201 if (local
->sw_scanning
) {
202 conf
.enable_beacon
= false;
205 * Beacon should be enabled, but AP mode must
206 * check whether there is a beacon configured.
208 switch (sdata
->vif
.type
) {
209 case NL80211_IFTYPE_AP
:
211 !!rcu_dereference(sdata
->u
.ap
.beacon
);
213 case NL80211_IFTYPE_ADHOC
:
214 conf
.enable_beacon
= !!sdata
->u
.ibss
.probe_resp
;
216 case NL80211_IFTYPE_MESH_POINT
:
217 conf
.enable_beacon
= true;
227 if (WARN_ON(!conf
.bssid
&& (changed
& IEEE80211_IFCC_BSSID
)))
230 conf
.changed
= changed
;
232 return local
->ops
->config_interface(local_to_hw(local
),
236 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
238 struct ieee80211_channel
*chan
;
241 enum nl80211_channel_type channel_type
;
245 if (local
->sw_scanning
) {
246 chan
= local
->scan_channel
;
247 channel_type
= NL80211_CHAN_NO_HT
;
249 chan
= local
->oper_channel
;
250 channel_type
= local
->oper_channel_type
;
253 if (chan
!= local
->hw
.conf
.channel
||
254 channel_type
!= local
->hw
.conf
.channel_type
) {
255 local
->hw
.conf
.channel
= chan
;
256 local
->hw
.conf
.channel_type
= channel_type
;
257 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
260 if (local
->sw_scanning
)
261 power
= chan
->max_power
;
263 power
= local
->power_constr_level
?
264 (chan
->max_power
- local
->power_constr_level
) :
267 if (local
->user_power_level
)
268 power
= min(power
, local
->user_power_level
);
270 if (local
->hw
.conf
.power_level
!= power
) {
271 changed
|= IEEE80211_CONF_CHANGE_POWER
;
272 local
->hw
.conf
.power_level
= power
;
275 if (changed
&& local
->open_count
) {
276 ret
= local
->ops
->config(local_to_hw(local
), changed
);
279 * HW reconfiguration should never fail, the driver has told
280 * us what it can support so it should live up to that promise.
283 * rfkill is not integrated with mac80211 and a
284 * configuration command can thus fail if hardware rfkill
287 * FIXME: integrate rfkill with mac80211 and then add this
297 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
300 struct ieee80211_local
*local
= sdata
->local
;
302 if (WARN_ON(sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
308 if (local
->ops
->bss_info_changed
)
309 local
->ops
->bss_info_changed(local_to_hw(local
),
311 &sdata
->vif
.bss_conf
,
315 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
317 sdata
->vif
.bss_conf
.use_cts_prot
= false;
318 sdata
->vif
.bss_conf
.use_short_preamble
= false;
319 sdata
->vif
.bss_conf
.use_short_slot
= false;
320 return BSS_CHANGED_ERP_CTS_PROT
|
321 BSS_CHANGED_ERP_PREAMBLE
|
322 BSS_CHANGED_ERP_SLOT
;
325 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
328 struct ieee80211_local
*local
= hw_to_local(hw
);
329 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
332 skb
->dev
= local
->mdev
;
333 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
334 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
335 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
336 tmp
= skb_queue_len(&local
->skb_queue
) +
337 skb_queue_len(&local
->skb_queue_unreliable
);
338 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
339 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
340 dev_kfree_skb_irq(skb
);
342 I802_DEBUG_INC(local
->tx_status_drop
);
344 tasklet_schedule(&local
->tasklet
);
346 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
348 static void ieee80211_tasklet_handler(unsigned long data
)
350 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
352 struct ieee80211_rx_status rx_status
;
353 struct ieee80211_ra_tid
*ra_tid
;
355 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
356 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
357 switch (skb
->pkt_type
) {
358 case IEEE80211_RX_MSG
:
359 /* status is in skb->cb */
360 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
361 /* Clear skb->pkt_type in order to not confuse kernel
364 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
366 case IEEE80211_TX_STATUS_MSG
:
368 ieee80211_tx_status(local_to_hw(local
), skb
);
370 case IEEE80211_DELBA_MSG
:
371 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
372 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
373 ra_tid
->ra
, ra_tid
->tid
);
376 case IEEE80211_ADDBA_MSG
:
377 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
378 ieee80211_start_tx_ba_cb(local_to_hw(local
),
379 ra_tid
->ra
, ra_tid
->tid
);
383 WARN(1, "mac80211: Packet is of unknown type %d\n",
391 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
392 * make a prepared TX frame (one that has been given to hw) to look like brand
393 * new IEEE 802.11 frame that is ready to go through TX processing again.
395 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
396 struct ieee80211_key
*key
,
399 unsigned int hdrlen
, iv_len
, mic_len
;
400 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
402 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
407 switch (key
->conf
.alg
) {
410 mic_len
= WEP_ICV_LEN
;
413 iv_len
= TKIP_IV_LEN
;
414 mic_len
= TKIP_ICV_LEN
;
417 iv_len
= CCMP_HDR_LEN
;
418 mic_len
= CCMP_MIC_LEN
;
424 if (skb
->len
>= hdrlen
+ mic_len
&&
425 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
426 skb_trim(skb
, skb
->len
- mic_len
);
427 if (skb
->len
>= hdrlen
+ iv_len
) {
428 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
429 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
433 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
434 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
435 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
436 hdrlen
- IEEE80211_QOS_CTL_LEN
);
437 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
441 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
442 struct sta_info
*sta
,
445 sta
->tx_filtered_count
++;
448 * Clear the TX filter mask for this STA when sending the next
449 * packet. If the STA went to power save mode, this will happen
450 * when it wakes up for the next time.
452 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
455 * This code races in the following way:
457 * (1) STA sends frame indicating it will go to sleep and does so
458 * (2) hardware/firmware adds STA to filter list, passes frame up
459 * (3) hardware/firmware processes TX fifo and suppresses a frame
460 * (4) we get TX status before having processed the frame and
461 * knowing that the STA has gone to sleep.
463 * This is actually quite unlikely even when both those events are
464 * processed from interrupts coming in quickly after one another or
465 * even at the same time because we queue both TX status events and
466 * RX frames to be processed by a tasklet and process them in the
467 * same order that they were received or TX status last. Hence, there
468 * is no race as long as the frame RX is processed before the next TX
469 * status, which drivers can ensure, see below.
471 * Note that this can only happen if the hardware or firmware can
472 * actually add STAs to the filter list, if this is done by the
473 * driver in response to set_tim() (which will only reduce the race
474 * this whole filtering tries to solve, not completely solve it)
475 * this situation cannot happen.
477 * To completely solve this race drivers need to make sure that they
478 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
480 * (b) always process RX events before TX status events if ordering
481 * can be unknown, for example with different interrupt status
484 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
485 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
486 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
487 skb_queue_tail(&sta
->tx_filtered
, skb
);
491 if (!test_sta_flags(sta
, WLAN_STA_PS
) && !skb
->requeue
) {
492 /* Software retry the packet once */
494 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
499 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
501 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
502 "queue_len=%d PS=%d @%lu\n",
503 wiphy_name(local
->hw
.wiphy
),
504 skb_queue_len(&sta
->tx_filtered
),
505 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
510 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
512 struct sk_buff
*skb2
;
513 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
514 struct ieee80211_local
*local
= hw_to_local(hw
);
515 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
518 struct ieee80211_supported_band
*sband
;
519 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
520 struct ieee80211_sub_if_data
*sdata
;
521 struct net_device
*prev_dev
= NULL
;
522 struct sta_info
*sta
;
523 int retry_count
= -1, i
;
525 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
526 /* the HW cannot have attempted that rate */
527 if (i
>= hw
->max_rates
) {
528 info
->status
.rates
[i
].idx
= -1;
529 info
->status
.rates
[i
].count
= 0;
532 retry_count
+= info
->status
.rates
[i
].count
;
539 sband
= local
->hw
.wiphy
->bands
[info
->band
];
541 sta
= sta_info_get(local
, hdr
->addr1
);
544 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
545 test_sta_flags(sta
, WLAN_STA_PS
)) {
547 * The STA is in power save mode, so assume
548 * that this TX packet failed because of that.
550 ieee80211_handle_filtered_frame(local
, sta
, skb
);
555 fc
= hdr
->frame_control
;
557 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
558 (ieee80211_is_data_qos(fc
))) {
562 qc
= ieee80211_get_qos_ctl(hdr
);
564 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
565 & IEEE80211_SCTL_SEQ
);
566 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
570 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
571 ieee80211_handle_filtered_frame(local
, sta
, skb
);
575 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
576 sta
->tx_retry_failed
++;
577 sta
->tx_retry_count
+= retry_count
;
580 rate_control_tx_status(local
, sband
, sta
, skb
);
585 ieee80211_led_tx(local
, 0);
588 * Fragments are passed to low-level drivers as separate skbs, so these
589 * are actually fragments, not frames. Update frame counters only for
590 * the first fragment of the frame. */
592 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
593 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
595 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
597 local
->dot11TransmittedFrameCount
++;
598 if (is_multicast_ether_addr(hdr
->addr1
))
599 local
->dot11MulticastTransmittedFrameCount
++;
601 local
->dot11RetryCount
++;
603 local
->dot11MultipleRetryCount
++;
606 /* This counter shall be incremented for an acknowledged MPDU
607 * with an individual address in the address 1 field or an MPDU
608 * with a multicast address in the address 1 field of type Data
610 if (!is_multicast_ether_addr(hdr
->addr1
) ||
611 type
== IEEE80211_FTYPE_DATA
||
612 type
== IEEE80211_FTYPE_MGMT
)
613 local
->dot11TransmittedFragmentCount
++;
616 local
->dot11FailedCount
++;
619 /* this was a transmitted frame, but now we want to reuse it */
623 * This is a bit racy but we can avoid a lot of work
626 if (!local
->monitors
&& !local
->cooked_mntrs
) {
631 /* send frame to monitor interfaces now */
633 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
634 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
639 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
640 skb_push(skb
, sizeof(*rthdr
));
642 memset(rthdr
, 0, sizeof(*rthdr
));
643 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
644 rthdr
->hdr
.it_present
=
645 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
646 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
647 (1 << IEEE80211_RADIOTAP_RATE
));
649 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
650 !is_multicast_ether_addr(hdr
->addr1
))
651 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
654 * XXX: Once radiotap gets the bitmap reset thing the vendor
655 * extensions proposal contains, we can actually report
656 * the whole set of tries we did.
658 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
659 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
660 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
661 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
662 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
663 if (info
->status
.rates
[0].idx
>= 0 &&
664 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
665 rthdr
->rate
= sband
->bitrates
[
666 info
->status
.rates
[0].idx
].bitrate
/ 5;
668 /* for now report the total retry_count */
669 rthdr
->data_retries
= retry_count
;
671 /* XXX: is this sufficient for BPF? */
672 skb_set_mac_header(skb
, 0);
673 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
674 skb
->pkt_type
= PACKET_OTHERHOST
;
675 skb
->protocol
= htons(ETH_P_802_2
);
676 memset(skb
->cb
, 0, sizeof(skb
->cb
));
679 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
680 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
681 if (!netif_running(sdata
->dev
))
685 skb2
= skb_clone(skb
, GFP_ATOMIC
);
687 skb2
->dev
= prev_dev
;
692 prev_dev
= sdata
->dev
;
703 EXPORT_SYMBOL(ieee80211_tx_status
);
705 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
706 const struct ieee80211_ops
*ops
)
708 struct ieee80211_local
*local
;
712 /* Ensure 32-byte alignment of our private data and hw private data.
713 * We use the wiphy priv data for both our ieee80211_local and for
714 * the driver's private data
716 * In memory it'll be like this:
718 * +-------------------------+
720 * +-------------------------+
721 * | struct ieee80211_local |
722 * +-------------------------+
723 * | driver's private data |
724 * +-------------------------+
727 priv_size
= ((sizeof(struct ieee80211_local
) +
728 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
731 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
736 wiphy
->privid
= mac80211_wiphy_privid
;
737 wiphy
->max_scan_ssids
= 4;
738 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
739 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
) -
740 sizeof(struct cfg80211_bss
);
742 local
= wiphy_priv(wiphy
);
743 local
->hw
.wiphy
= wiphy
;
745 local
->hw
.priv
= (char *)local
+
746 ((sizeof(struct ieee80211_local
) +
747 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
752 BUG_ON(!ops
->config
);
753 BUG_ON(!ops
->add_interface
);
754 BUG_ON(!ops
->remove_interface
);
755 BUG_ON(!ops
->configure_filter
);
758 /* set up some defaults */
759 local
->hw
.queues
= 1;
760 local
->hw
.max_rates
= 1;
761 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
762 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
763 local
->hw
.conf
.long_frame_max_tx_count
= 4;
764 local
->hw
.conf
.short_frame_max_tx_count
= 7;
765 local
->hw
.conf
.radio_enabled
= true;
767 INIT_LIST_HEAD(&local
->interfaces
);
768 mutex_init(&local
->iflist_mtx
);
770 spin_lock_init(&local
->key_lock
);
772 spin_lock_init(&local
->queue_stop_reason_lock
);
774 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
776 INIT_WORK(&local
->dynamic_ps_enable_work
,
777 ieee80211_dynamic_ps_enable_work
);
778 INIT_WORK(&local
->dynamic_ps_disable_work
,
779 ieee80211_dynamic_ps_disable_work
);
780 setup_timer(&local
->dynamic_ps_timer
,
781 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
783 for (i
= 0; i
< IEEE80211_MAX_AMPDU_QUEUES
; i
++)
784 local
->ampdu_ac_queue
[i
] = -1;
785 /* using an s8 won't work with more than that */
786 BUILD_BUG_ON(IEEE80211_MAX_AMPDU_QUEUES
> 127);
788 sta_info_init(local
);
790 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
791 (unsigned long)local
);
792 tasklet_disable(&local
->tx_pending_tasklet
);
794 tasklet_init(&local
->tasklet
,
795 ieee80211_tasklet_handler
,
796 (unsigned long) local
);
797 tasklet_disable(&local
->tasklet
);
799 skb_queue_head_init(&local
->skb_queue
);
800 skb_queue_head_init(&local
->skb_queue_unreliable
);
802 return local_to_hw(local
);
804 EXPORT_SYMBOL(ieee80211_alloc_hw
);
806 static const struct net_device_ops ieee80211_master_ops
= {
807 .ndo_start_xmit
= ieee80211_master_start_xmit
,
808 .ndo_open
= ieee80211_master_open
,
809 .ndo_stop
= ieee80211_master_stop
,
810 .ndo_set_multicast_list
= ieee80211_master_set_multicast_list
,
811 .ndo_select_queue
= ieee80211_select_queue
,
814 static void ieee80211_master_setup(struct net_device
*mdev
)
816 mdev
->type
= ARPHRD_IEEE80211
;
817 mdev
->netdev_ops
= &ieee80211_master_ops
;
818 mdev
->header_ops
= &ieee80211_header_ops
;
819 mdev
->tx_queue_len
= 1000;
820 mdev
->addr_len
= ETH_ALEN
;
823 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
825 struct ieee80211_local
*local
= hw_to_local(hw
);
827 enum ieee80211_band band
;
828 struct net_device
*mdev
;
829 struct ieee80211_master_priv
*mpriv
;
833 * generic code guarantees at least one band,
834 * set this very early because much code assumes
835 * that hw.conf.channel is assigned
838 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
839 struct ieee80211_supported_band
*sband
;
841 sband
= local
->hw
.wiphy
->bands
[band
];
842 if (sband
&& !local
->oper_channel
) {
843 /* init channel we're on */
844 local
->hw
.conf
.channel
=
845 local
->oper_channel
=
846 local
->scan_channel
= &sband
->channels
[0];
849 channels
+= sband
->n_channels
;
852 local
->int_scan_req
.n_channels
= channels
;
853 local
->int_scan_req
.channels
= kzalloc(sizeof(void *) * channels
, GFP_KERNEL
);
854 if (!local
->int_scan_req
.channels
)
857 /* if low-level driver supports AP, we also support VLAN */
858 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
859 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
861 /* mac80211 always supports monitor */
862 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
864 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
865 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
866 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
867 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
869 result
= wiphy_register(local
->hw
.wiphy
);
871 goto fail_wiphy_register
;
874 * We use the number of queues for feature tests (QoS, HT) internally
875 * so restrict them appropriately.
877 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
878 hw
->queues
= IEEE80211_MAX_QUEUES
;
879 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
880 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
882 hw
->ampdu_queues
= 0;
884 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_master_priv
),
885 "wmaster%d", ieee80211_master_setup
,
888 goto fail_mdev_alloc
;
890 mpriv
= netdev_priv(mdev
);
891 mpriv
->local
= local
;
894 local
->hw
.workqueue
=
895 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
896 if (!local
->hw
.workqueue
) {
902 * The hardware needs headroom for sending the frame,
903 * and we need some headroom for passing the frame to monitor
904 * interfaces, but never both at the same time.
906 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
907 sizeof(struct ieee80211_tx_status_rtap_hdr
));
909 debugfs_hw_add(local
);
911 if (local
->hw
.conf
.beacon_int
< 10)
912 local
->hw
.conf
.beacon_int
= 100;
914 if (local
->hw
.max_listen_interval
== 0)
915 local
->hw
.max_listen_interval
= 1;
917 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
919 result
= sta_info_start(local
);
924 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
928 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
929 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
930 local
->mdev
->features
|= NETIF_F_NETNS_LOCAL
;
932 result
= register_netdevice(local
->mdev
);
936 result
= ieee80211_init_rate_ctrl_alg(local
,
937 hw
->rate_control_algorithm
);
939 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
940 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
944 result
= ieee80211_wep_init(local
);
947 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
948 wiphy_name(local
->hw
.wiphy
), result
);
952 /* add one default STA interface if supported */
953 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
954 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
955 NL80211_IFTYPE_STATION
, NULL
);
957 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
958 wiphy_name(local
->hw
.wiphy
));
963 ieee80211_led_init(local
);
965 /* alloc internal scan request */
967 local
->int_scan_req
.ssids
= &local
->scan_ssid
;
968 local
->int_scan_req
.n_ssids
= 1;
969 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
970 if (!hw
->wiphy
->bands
[band
])
972 for (j
= 0; j
< hw
->wiphy
->bands
[band
]->n_channels
; j
++) {
973 local
->int_scan_req
.channels
[i
] =
974 &hw
->wiphy
->bands
[band
]->channels
[j
];
982 rate_control_deinitialize(local
);
984 unregister_netdevice(local
->mdev
);
988 sta_info_stop(local
);
990 debugfs_hw_del(local
);
991 destroy_workqueue(local
->hw
.workqueue
);
994 free_netdev(local
->mdev
);
996 wiphy_unregister(local
->hw
.wiphy
);
998 kfree(local
->int_scan_req
.channels
);
1001 EXPORT_SYMBOL(ieee80211_register_hw
);
1003 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1005 struct ieee80211_local
*local
= hw_to_local(hw
);
1007 tasklet_kill(&local
->tx_pending_tasklet
);
1008 tasklet_kill(&local
->tasklet
);
1013 * At this point, interface list manipulations are fine
1014 * because the driver cannot be handing us frames any
1015 * more and the tasklet is killed.
1018 /* First, we remove all virtual interfaces. */
1019 ieee80211_remove_interfaces(local
);
1021 /* then, finally, remove the master interface */
1022 unregister_netdevice(local
->mdev
);
1026 ieee80211_clear_tx_pending(local
);
1027 sta_info_stop(local
);
1028 rate_control_deinitialize(local
);
1029 debugfs_hw_del(local
);
1031 if (skb_queue_len(&local
->skb_queue
)
1032 || skb_queue_len(&local
->skb_queue_unreliable
))
1033 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1034 wiphy_name(local
->hw
.wiphy
));
1035 skb_queue_purge(&local
->skb_queue
);
1036 skb_queue_purge(&local
->skb_queue_unreliable
);
1038 destroy_workqueue(local
->hw
.workqueue
);
1039 wiphy_unregister(local
->hw
.wiphy
);
1040 ieee80211_wep_free(local
);
1041 ieee80211_led_exit(local
);
1042 free_netdev(local
->mdev
);
1043 kfree(local
->int_scan_req
.channels
);
1045 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1047 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1049 struct ieee80211_local
*local
= hw_to_local(hw
);
1051 mutex_destroy(&local
->iflist_mtx
);
1053 wiphy_free(local
->hw
.wiphy
);
1055 EXPORT_SYMBOL(ieee80211_free_hw
);
1057 static int __init
ieee80211_init(void)
1059 struct sk_buff
*skb
;
1062 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1063 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1064 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1066 ret
= rc80211_minstrel_init();
1070 ret
= rc80211_pid_init();
1074 ieee80211_debugfs_netdev_init();
1079 static void __exit
ieee80211_exit(void)
1082 rc80211_minstrel_exit();
1085 * For key todo, it'll be empty by now but the work
1086 * might still be scheduled.
1088 flush_scheduled_work();
1093 ieee80211_debugfs_netdev_exit();
1097 subsys_initcall(ieee80211_init
);
1098 module_exit(ieee80211_exit
);
1100 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1101 MODULE_LICENSE("GPL");