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
));
171 conf
.changed
= changed
;
173 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
||
174 sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
175 conf
.bssid
= sdata
->u
.sta
.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 u8 zero
[ETH_ALEN
] = { 0 };
186 if (WARN_ON(!conf
.bssid
&& (changed
& IEEE80211_IFCC_BSSID
)))
189 return local
->ops
->config_interface(local_to_hw(local
),
193 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
195 struct ieee80211_channel
*chan
;
198 enum nl80211_channel_type channel_type
;
202 if (local
->sw_scanning
) {
203 chan
= local
->scan_channel
;
204 channel_type
= NL80211_CHAN_NO_HT
;
206 chan
= local
->oper_channel
;
207 channel_type
= local
->oper_channel_type
;
210 if (chan
!= local
->hw
.conf
.channel
||
211 channel_type
!= local
->hw
.conf
.channel_type
) {
212 local
->hw
.conf
.channel
= chan
;
213 local
->hw
.conf
.channel_type
= channel_type
;
214 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
217 if (!local
->user_power_level
)
218 power
= chan
->max_power
;
220 power
= min(chan
->max_power
, local
->user_power_level
);
221 if (local
->hw
.conf
.power_level
!= power
) {
222 changed
|= IEEE80211_CONF_CHANGE_POWER
;
223 local
->hw
.conf
.power_level
= power
;
226 if (changed
&& local
->open_count
) {
227 ret
= local
->ops
->config(local_to_hw(local
), changed
);
230 * HW reconfiguration should never fail, the driver has told
231 * us what it can support so it should live up to that promise.
234 * rfkill is not integrated with mac80211 and a
235 * configuration command can thus fail if hardware rfkill
238 * FIXME: integrate rfkill with mac80211 and then add this
248 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
251 struct ieee80211_local
*local
= sdata
->local
;
253 if (WARN_ON(sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
))
259 if (local
->ops
->bss_info_changed
)
260 local
->ops
->bss_info_changed(local_to_hw(local
),
262 &sdata
->vif
.bss_conf
,
266 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
268 sdata
->vif
.bss_conf
.use_cts_prot
= false;
269 sdata
->vif
.bss_conf
.use_short_preamble
= false;
270 sdata
->vif
.bss_conf
.use_short_slot
= false;
271 return BSS_CHANGED_ERP_CTS_PROT
|
272 BSS_CHANGED_ERP_PREAMBLE
|
273 BSS_CHANGED_ERP_SLOT
;
276 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
279 struct ieee80211_local
*local
= hw_to_local(hw
);
280 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
283 skb
->dev
= local
->mdev
;
284 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
285 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
286 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
287 tmp
= skb_queue_len(&local
->skb_queue
) +
288 skb_queue_len(&local
->skb_queue_unreliable
);
289 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
290 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
291 dev_kfree_skb_irq(skb
);
293 I802_DEBUG_INC(local
->tx_status_drop
);
295 tasklet_schedule(&local
->tasklet
);
297 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
299 static void ieee80211_tasklet_handler(unsigned long data
)
301 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
303 struct ieee80211_rx_status rx_status
;
304 struct ieee80211_ra_tid
*ra_tid
;
306 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
307 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
308 switch (skb
->pkt_type
) {
309 case IEEE80211_RX_MSG
:
310 /* status is in skb->cb */
311 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
312 /* Clear skb->pkt_type in order to not confuse kernel
315 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
317 case IEEE80211_TX_STATUS_MSG
:
319 ieee80211_tx_status(local_to_hw(local
), skb
);
321 case IEEE80211_DELBA_MSG
:
322 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
323 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
324 ra_tid
->ra
, ra_tid
->tid
);
327 case IEEE80211_ADDBA_MSG
:
328 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
329 ieee80211_start_tx_ba_cb(local_to_hw(local
),
330 ra_tid
->ra
, ra_tid
->tid
);
334 WARN(1, "mac80211: Packet is of unknown type %d\n",
342 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
343 * make a prepared TX frame (one that has been given to hw) to look like brand
344 * new IEEE 802.11 frame that is ready to go through TX processing again.
346 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
347 struct ieee80211_key
*key
,
350 unsigned int hdrlen
, iv_len
, mic_len
;
351 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
353 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
358 switch (key
->conf
.alg
) {
361 mic_len
= WEP_ICV_LEN
;
364 iv_len
= TKIP_IV_LEN
;
365 mic_len
= TKIP_ICV_LEN
;
368 iv_len
= CCMP_HDR_LEN
;
369 mic_len
= CCMP_MIC_LEN
;
375 if (skb
->len
>= hdrlen
+ mic_len
&&
376 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
377 skb_trim(skb
, skb
->len
- mic_len
);
378 if (skb
->len
>= hdrlen
+ iv_len
) {
379 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
380 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
384 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
385 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
386 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
387 hdrlen
- IEEE80211_QOS_CTL_LEN
);
388 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
392 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
393 struct sta_info
*sta
,
396 sta
->tx_filtered_count
++;
399 * Clear the TX filter mask for this STA when sending the next
400 * packet. If the STA went to power save mode, this will happen
401 * when it wakes up for the next time.
403 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
406 * This code races in the following way:
408 * (1) STA sends frame indicating it will go to sleep and does so
409 * (2) hardware/firmware adds STA to filter list, passes frame up
410 * (3) hardware/firmware processes TX fifo and suppresses a frame
411 * (4) we get TX status before having processed the frame and
412 * knowing that the STA has gone to sleep.
414 * This is actually quite unlikely even when both those events are
415 * processed from interrupts coming in quickly after one another or
416 * even at the same time because we queue both TX status events and
417 * RX frames to be processed by a tasklet and process them in the
418 * same order that they were received or TX status last. Hence, there
419 * is no race as long as the frame RX is processed before the next TX
420 * status, which drivers can ensure, see below.
422 * Note that this can only happen if the hardware or firmware can
423 * actually add STAs to the filter list, if this is done by the
424 * driver in response to set_tim() (which will only reduce the race
425 * this whole filtering tries to solve, not completely solve it)
426 * this situation cannot happen.
428 * To completely solve this race drivers need to make sure that they
429 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
431 * (b) always process RX events before TX status events if ordering
432 * can be unknown, for example with different interrupt status
435 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
436 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
437 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
438 skb_queue_tail(&sta
->tx_filtered
, skb
);
442 if (!test_sta_flags(sta
, WLAN_STA_PS
) && !skb
->requeue
) {
443 /* Software retry the packet once */
445 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
450 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
452 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
453 "queue_len=%d PS=%d @%lu\n",
454 wiphy_name(local
->hw
.wiphy
),
455 skb_queue_len(&sta
->tx_filtered
),
456 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
461 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
463 struct sk_buff
*skb2
;
464 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
465 struct ieee80211_local
*local
= hw_to_local(hw
);
466 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
469 struct ieee80211_supported_band
*sband
;
470 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
471 struct ieee80211_sub_if_data
*sdata
;
472 struct net_device
*prev_dev
= NULL
;
473 struct sta_info
*sta
;
474 int retry_count
= -1, i
;
476 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
477 /* the HW cannot have attempted that rate */
478 if (i
>= hw
->max_rates
) {
479 info
->status
.rates
[i
].idx
= -1;
480 info
->status
.rates
[i
].count
= 0;
483 retry_count
+= info
->status
.rates
[i
].count
;
490 sband
= local
->hw
.wiphy
->bands
[info
->band
];
492 sta
= sta_info_get(local
, hdr
->addr1
);
495 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
496 test_sta_flags(sta
, WLAN_STA_PS
)) {
498 * The STA is in power save mode, so assume
499 * that this TX packet failed because of that.
501 ieee80211_handle_filtered_frame(local
, sta
, skb
);
506 fc
= hdr
->frame_control
;
508 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
509 (ieee80211_is_data_qos(fc
))) {
513 qc
= ieee80211_get_qos_ctl(hdr
);
515 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
516 & IEEE80211_SCTL_SEQ
);
517 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
521 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
522 ieee80211_handle_filtered_frame(local
, sta
, skb
);
526 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
527 sta
->tx_retry_failed
++;
528 sta
->tx_retry_count
+= retry_count
;
531 rate_control_tx_status(local
, sband
, sta
, skb
);
536 ieee80211_led_tx(local
, 0);
539 * Fragments are passed to low-level drivers as separate skbs, so these
540 * are actually fragments, not frames. Update frame counters only for
541 * the first fragment of the frame. */
543 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
544 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
546 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
548 local
->dot11TransmittedFrameCount
++;
549 if (is_multicast_ether_addr(hdr
->addr1
))
550 local
->dot11MulticastTransmittedFrameCount
++;
552 local
->dot11RetryCount
++;
554 local
->dot11MultipleRetryCount
++;
557 /* This counter shall be incremented for an acknowledged MPDU
558 * with an individual address in the address 1 field or an MPDU
559 * with a multicast address in the address 1 field of type Data
561 if (!is_multicast_ether_addr(hdr
->addr1
) ||
562 type
== IEEE80211_FTYPE_DATA
||
563 type
== IEEE80211_FTYPE_MGMT
)
564 local
->dot11TransmittedFragmentCount
++;
567 local
->dot11FailedCount
++;
570 /* this was a transmitted frame, but now we want to reuse it */
574 * This is a bit racy but we can avoid a lot of work
577 if (!local
->monitors
&& !local
->cooked_mntrs
) {
582 /* send frame to monitor interfaces now */
584 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
585 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
590 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
591 skb_push(skb
, sizeof(*rthdr
));
593 memset(rthdr
, 0, sizeof(*rthdr
));
594 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
595 rthdr
->hdr
.it_present
=
596 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
597 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
598 (1 << IEEE80211_RADIOTAP_RATE
));
600 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
601 !is_multicast_ether_addr(hdr
->addr1
))
602 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
605 * XXX: Once radiotap gets the bitmap reset thing the vendor
606 * extensions proposal contains, we can actually report
607 * the whole set of tries we did.
609 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
610 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
611 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
612 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
613 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
614 if (info
->status
.rates
[0].idx
>= 0 &&
615 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
616 rthdr
->rate
= sband
->bitrates
[
617 info
->status
.rates
[0].idx
].bitrate
/ 5;
619 /* for now report the total retry_count */
620 rthdr
->data_retries
= retry_count
;
622 /* XXX: is this sufficient for BPF? */
623 skb_set_mac_header(skb
, 0);
624 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
625 skb
->pkt_type
= PACKET_OTHERHOST
;
626 skb
->protocol
= htons(ETH_P_802_2
);
627 memset(skb
->cb
, 0, sizeof(skb
->cb
));
630 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
631 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
632 if (!netif_running(sdata
->dev
))
636 skb2
= skb_clone(skb
, GFP_ATOMIC
);
638 skb2
->dev
= prev_dev
;
643 prev_dev
= sdata
->dev
;
654 EXPORT_SYMBOL(ieee80211_tx_status
);
656 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
657 const struct ieee80211_ops
*ops
)
659 struct ieee80211_local
*local
;
663 /* Ensure 32-byte alignment of our private data and hw private data.
664 * We use the wiphy priv data for both our ieee80211_local and for
665 * the driver's private data
667 * In memory it'll be like this:
669 * +-------------------------+
671 * +-------------------------+
672 * | struct ieee80211_local |
673 * +-------------------------+
674 * | driver's private data |
675 * +-------------------------+
678 priv_size
= ((sizeof(struct ieee80211_local
) +
679 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
682 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
687 wiphy
->privid
= mac80211_wiphy_privid
;
689 local
= wiphy_priv(wiphy
);
690 local
->hw
.wiphy
= wiphy
;
692 local
->hw
.priv
= (char *)local
+
693 ((sizeof(struct ieee80211_local
) +
694 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
699 BUG_ON(!ops
->config
);
700 BUG_ON(!ops
->add_interface
);
701 BUG_ON(!ops
->remove_interface
);
702 BUG_ON(!ops
->configure_filter
);
705 /* set up some defaults */
706 local
->hw
.queues
= 1;
707 local
->hw
.max_rates
= 1;
708 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
709 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
710 local
->hw
.conf
.long_frame_max_tx_count
= 4;
711 local
->hw
.conf
.short_frame_max_tx_count
= 7;
712 local
->hw
.conf
.radio_enabled
= true;
714 INIT_LIST_HEAD(&local
->interfaces
);
716 spin_lock_init(&local
->key_lock
);
718 spin_lock_init(&local
->queue_stop_reason_lock
);
720 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
722 INIT_WORK(&local
->dynamic_ps_enable_work
,
723 ieee80211_dynamic_ps_enable_work
);
724 INIT_WORK(&local
->dynamic_ps_disable_work
,
725 ieee80211_dynamic_ps_disable_work
);
726 setup_timer(&local
->dynamic_ps_timer
,
727 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
729 sta_info_init(local
);
731 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
732 (unsigned long)local
);
733 tasklet_disable(&local
->tx_pending_tasklet
);
735 tasklet_init(&local
->tasklet
,
736 ieee80211_tasklet_handler
,
737 (unsigned long) local
);
738 tasklet_disable(&local
->tasklet
);
740 skb_queue_head_init(&local
->skb_queue
);
741 skb_queue_head_init(&local
->skb_queue_unreliable
);
743 return local_to_hw(local
);
745 EXPORT_SYMBOL(ieee80211_alloc_hw
);
747 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
749 struct ieee80211_local
*local
= hw_to_local(hw
);
751 enum ieee80211_band band
;
752 struct net_device
*mdev
;
753 struct ieee80211_master_priv
*mpriv
;
756 * generic code guarantees at least one band,
757 * set this very early because much code assumes
758 * that hw.conf.channel is assigned
760 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
761 struct ieee80211_supported_band
*sband
;
763 sband
= local
->hw
.wiphy
->bands
[band
];
765 /* init channel we're on */
766 local
->hw
.conf
.channel
=
767 local
->oper_channel
=
768 local
->scan_channel
= &sband
->channels
[0];
773 /* if low-level driver supports AP, we also support VLAN */
774 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
775 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
777 /* mac80211 always supports monitor */
778 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
780 result
= wiphy_register(local
->hw
.wiphy
);
785 * We use the number of queues for feature tests (QoS, HT) internally
786 * so restrict them appropriately.
788 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
789 hw
->queues
= IEEE80211_MAX_QUEUES
;
790 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
791 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
793 hw
->ampdu_queues
= 0;
795 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_master_priv
),
796 "wmaster%d", ether_setup
,
797 ieee80211_num_queues(hw
));
799 goto fail_mdev_alloc
;
801 mpriv
= netdev_priv(mdev
);
802 mpriv
->local
= local
;
805 ieee80211_rx_bss_list_init(local
);
807 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
808 mdev
->open
= ieee80211_master_open
;
809 mdev
->stop
= ieee80211_master_stop
;
810 mdev
->type
= ARPHRD_IEEE80211
;
811 mdev
->header_ops
= &ieee80211_header_ops
;
812 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
814 local
->hw
.workqueue
=
815 create_freezeable_workqueue(wiphy_name(local
->hw
.wiphy
));
816 if (!local
->hw
.workqueue
) {
822 * The hardware needs headroom for sending the frame,
823 * and we need some headroom for passing the frame to monitor
824 * interfaces, but never both at the same time.
826 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
827 sizeof(struct ieee80211_tx_status_rtap_hdr
));
829 debugfs_hw_add(local
);
831 if (local
->hw
.conf
.beacon_int
< 10)
832 local
->hw
.conf
.beacon_int
= 100;
834 if (local
->hw
.max_listen_interval
== 0)
835 local
->hw
.max_listen_interval
= 1;
837 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
839 local
->wstats_flags
|= local
->hw
.flags
& (IEEE80211_HW_SIGNAL_UNSPEC
|
840 IEEE80211_HW_SIGNAL_DB
|
841 IEEE80211_HW_SIGNAL_DBM
) ?
842 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
843 local
->wstats_flags
|= local
->hw
.flags
& IEEE80211_HW_NOISE_DBM
?
844 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
845 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
846 local
->wstats_flags
|= IW_QUAL_DBM
;
848 result
= sta_info_start(local
);
853 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
857 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
858 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
860 result
= register_netdevice(local
->mdev
);
864 result
= ieee80211_init_rate_ctrl_alg(local
,
865 hw
->rate_control_algorithm
);
867 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
868 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
872 result
= ieee80211_wep_init(local
);
875 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
876 wiphy_name(local
->hw
.wiphy
), result
);
880 local
->mdev
->select_queue
= ieee80211_select_queue
;
882 /* add one default STA interface if supported */
883 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
884 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
885 NL80211_IFTYPE_STATION
, NULL
);
887 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
888 wiphy_name(local
->hw
.wiphy
));
893 ieee80211_led_init(local
);
898 rate_control_deinitialize(local
);
900 unregister_netdevice(local
->mdev
);
904 sta_info_stop(local
);
906 debugfs_hw_del(local
);
907 destroy_workqueue(local
->hw
.workqueue
);
910 free_netdev(local
->mdev
);
912 wiphy_unregister(local
->hw
.wiphy
);
915 EXPORT_SYMBOL(ieee80211_register_hw
);
917 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
919 struct ieee80211_local
*local
= hw_to_local(hw
);
921 tasklet_kill(&local
->tx_pending_tasklet
);
922 tasklet_kill(&local
->tasklet
);
927 * At this point, interface list manipulations are fine
928 * because the driver cannot be handing us frames any
929 * more and the tasklet is killed.
932 /* First, we remove all virtual interfaces. */
933 ieee80211_remove_interfaces(local
);
935 /* then, finally, remove the master interface */
936 unregister_netdevice(local
->mdev
);
940 ieee80211_rx_bss_list_deinit(local
);
941 ieee80211_clear_tx_pending(local
);
942 sta_info_stop(local
);
943 rate_control_deinitialize(local
);
944 debugfs_hw_del(local
);
946 if (skb_queue_len(&local
->skb_queue
)
947 || skb_queue_len(&local
->skb_queue_unreliable
))
948 printk(KERN_WARNING
"%s: skb_queue not empty\n",
949 wiphy_name(local
->hw
.wiphy
));
950 skb_queue_purge(&local
->skb_queue
);
951 skb_queue_purge(&local
->skb_queue_unreliable
);
953 destroy_workqueue(local
->hw
.workqueue
);
954 wiphy_unregister(local
->hw
.wiphy
);
955 ieee80211_wep_free(local
);
956 ieee80211_led_exit(local
);
957 free_netdev(local
->mdev
);
959 EXPORT_SYMBOL(ieee80211_unregister_hw
);
961 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
963 struct ieee80211_local
*local
= hw_to_local(hw
);
965 wiphy_free(local
->hw
.wiphy
);
967 EXPORT_SYMBOL(ieee80211_free_hw
);
969 static int __init
ieee80211_init(void)
974 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
975 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
976 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
978 ret
= rc80211_minstrel_init();
982 ret
= rc80211_pid_init();
986 ieee80211_debugfs_netdev_init();
991 static void __exit
ieee80211_exit(void)
994 rc80211_minstrel_exit();
997 * For key todo, it'll be empty by now but the work
998 * might still be scheduled.
1000 flush_scheduled_work();
1005 ieee80211_debugfs_netdev_exit();
1009 subsys_initcall(ieee80211_init
);
1010 module_exit(ieee80211_exit
);
1012 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1013 MODULE_LICENSE("GPL");