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"
29 #include "driver-ops.h"
38 #include "debugfs_netdev.h"
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
44 struct ieee80211_tx_status_rtap_hdr
{
45 struct ieee80211_radiotap_header hdr
;
50 } __attribute__ ((packed
));
53 void ieee80211_configure_filter(struct ieee80211_local
*local
)
56 unsigned int changed_flags
;
57 unsigned int new_flags
= 0;
59 if (atomic_read(&local
->iff_promiscs
))
60 new_flags
|= FIF_PROMISC_IN_BSS
;
62 if (atomic_read(&local
->iff_allmultis
))
63 new_flags
|= FIF_ALLMULTI
;
65 if (local
->monitors
|| local
->scanning
)
66 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
68 if (local
->fif_fcsfail
)
69 new_flags
|= FIF_FCSFAIL
;
71 if (local
->fif_plcpfail
)
72 new_flags
|= FIF_PLCPFAIL
;
74 if (local
->fif_control
)
75 new_flags
|= FIF_CONTROL
;
77 if (local
->fif_other_bss
)
78 new_flags
|= FIF_OTHER_BSS
;
80 if (local
->fif_pspoll
)
81 new_flags
|= FIF_PSPOLL
;
83 spin_lock_bh(&local
->filter_lock
);
84 changed_flags
= local
->filter_flags
^ new_flags
;
86 mc
= drv_prepare_multicast(local
, local
->mc_count
, local
->mc_list
);
87 spin_unlock_bh(&local
->filter_lock
);
92 drv_configure_filter(local
, changed_flags
, &new_flags
, mc
);
94 WARN_ON(new_flags
& (1<<31));
96 local
->filter_flags
= new_flags
& ~(1<<31);
99 static void ieee80211_reconfig_filter(struct work_struct
*work
)
101 struct ieee80211_local
*local
=
102 container_of(work
, struct ieee80211_local
, reconfig_filter
);
104 ieee80211_configure_filter(local
);
107 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
109 struct ieee80211_channel
*chan
, *scan_chan
;
112 enum nl80211_channel_type channel_type
;
116 scan_chan
= local
->scan_channel
;
120 channel_type
= NL80211_CHAN_NO_HT
;
122 chan
= local
->oper_channel
;
123 channel_type
= local
->oper_channel_type
;
126 if (chan
!= local
->hw
.conf
.channel
||
127 channel_type
!= local
->hw
.conf
.channel_type
) {
128 local
->hw
.conf
.channel
= chan
;
129 local
->hw
.conf
.channel_type
= channel_type
;
130 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
134 power
= chan
->max_power
;
136 power
= local
->power_constr_level
?
137 (chan
->max_power
- local
->power_constr_level
) :
140 if (local
->user_power_level
>= 0)
141 power
= min(power
, local
->user_power_level
);
143 if (local
->hw
.conf
.power_level
!= power
) {
144 changed
|= IEEE80211_CONF_CHANGE_POWER
;
145 local
->hw
.conf
.power_level
= power
;
148 if (changed
&& local
->open_count
) {
149 ret
= drv_config(local
, changed
);
152 * HW reconfiguration should never fail, the driver has told
153 * us what it can support so it should live up to that promise.
156 * rfkill is not integrated with mac80211 and a
157 * configuration command can thus fail if hardware rfkill
160 * FIXME: integrate rfkill with mac80211 and then add this
170 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
173 struct ieee80211_local
*local
= sdata
->local
;
174 static const u8 zero
[ETH_ALEN
] = { 0 };
179 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
181 * While not associated, claim a BSSID of all-zeroes
182 * so that drivers don't do any weird things with the
183 * BSSID at that time.
185 if (sdata
->vif
.bss_conf
.assoc
)
186 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
188 sdata
->vif
.bss_conf
.bssid
= zero
;
189 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
190 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
191 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
192 sdata
->vif
.bss_conf
.bssid
= sdata
->dev
->dev_addr
;
193 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
194 sdata
->vif
.bss_conf
.bssid
= zero
;
200 switch (sdata
->vif
.type
) {
201 case NL80211_IFTYPE_AP
:
202 case NL80211_IFTYPE_ADHOC
:
203 case NL80211_IFTYPE_MESH_POINT
:
206 /* do not warn to simplify caller in scan.c */
207 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
208 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
213 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
214 if (local
->quiescing
|| !netif_running(sdata
->dev
) ||
215 test_bit(SCAN_SW_SCANNING
, &local
->scanning
)) {
216 sdata
->vif
.bss_conf
.enable_beacon
= false;
219 * Beacon should be enabled, but AP mode must
220 * check whether there is a beacon configured.
222 switch (sdata
->vif
.type
) {
223 case NL80211_IFTYPE_AP
:
224 sdata
->vif
.bss_conf
.enable_beacon
=
225 !!rcu_dereference(sdata
->u
.ap
.beacon
);
227 case NL80211_IFTYPE_ADHOC
:
228 sdata
->vif
.bss_conf
.enable_beacon
=
229 !!rcu_dereference(sdata
->u
.ibss
.presp
);
231 case NL80211_IFTYPE_MESH_POINT
:
232 sdata
->vif
.bss_conf
.enable_beacon
= true;
242 drv_bss_info_changed(local
, &sdata
->vif
,
243 &sdata
->vif
.bss_conf
, changed
);
246 local
->hw
.conf
.beacon_int
= sdata
->vif
.bss_conf
.beacon_int
;
249 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
251 sdata
->vif
.bss_conf
.use_cts_prot
= false;
252 sdata
->vif
.bss_conf
.use_short_preamble
= false;
253 sdata
->vif
.bss_conf
.use_short_slot
= false;
254 return BSS_CHANGED_ERP_CTS_PROT
|
255 BSS_CHANGED_ERP_PREAMBLE
|
256 BSS_CHANGED_ERP_SLOT
;
259 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
262 struct ieee80211_local
*local
= hw_to_local(hw
);
263 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
266 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
267 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
268 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
269 tmp
= skb_queue_len(&local
->skb_queue
) +
270 skb_queue_len(&local
->skb_queue_unreliable
);
271 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
272 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
273 dev_kfree_skb_irq(skb
);
275 I802_DEBUG_INC(local
->tx_status_drop
);
277 tasklet_schedule(&local
->tasklet
);
279 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
281 static void ieee80211_tasklet_handler(unsigned long data
)
283 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
285 struct ieee80211_ra_tid
*ra_tid
;
287 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
288 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
289 switch (skb
->pkt_type
) {
290 case IEEE80211_RX_MSG
:
291 /* Clear skb->pkt_type in order to not confuse kernel
294 ieee80211_rx(local_to_hw(local
), skb
);
296 case IEEE80211_TX_STATUS_MSG
:
298 ieee80211_tx_status(local_to_hw(local
), skb
);
300 case IEEE80211_DELBA_MSG
:
301 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
302 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
303 ra_tid
->ra
, ra_tid
->tid
);
306 case IEEE80211_ADDBA_MSG
:
307 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
308 ieee80211_start_tx_ba_cb(local_to_hw(local
),
309 ra_tid
->ra
, ra_tid
->tid
);
313 WARN(1, "mac80211: Packet is of unknown type %d\n",
321 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
322 struct sta_info
*sta
,
325 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
328 * XXX: This is temporary!
330 * The problem here is that when we get here, the driver will
331 * quite likely have pretty much overwritten info->control by
332 * using info->driver_data or info->rate_driver_data. Thus,
333 * when passing out the frame to the driver again, we would be
334 * passing completely bogus data since the driver would then
335 * expect a properly filled info->control. In mac80211 itself
336 * the same problem occurs, since we need info->control.vif
339 * To fix this, we should send the frame through TX processing
340 * again. However, it's not that simple, since the frame will
341 * have been software-encrypted (if applicable) already, and
342 * encrypting it again doesn't do much good. So to properly do
343 * that, we not only have to skip the actual 'raw' encryption
344 * (key selection etc. still has to be done!) but also the
345 * sequence number assignment since that impacts the crypto
346 * encapsulation, of course.
348 * Hence, for now, fix the bug by just dropping the frame.
352 sta
->tx_filtered_count
++;
355 * Clear the TX filter mask for this STA when sending the next
356 * packet. If the STA went to power save mode, this will happen
357 * when it wakes up for the next time.
359 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
362 * This code races in the following way:
364 * (1) STA sends frame indicating it will go to sleep and does so
365 * (2) hardware/firmware adds STA to filter list, passes frame up
366 * (3) hardware/firmware processes TX fifo and suppresses a frame
367 * (4) we get TX status before having processed the frame and
368 * knowing that the STA has gone to sleep.
370 * This is actually quite unlikely even when both those events are
371 * processed from interrupts coming in quickly after one another or
372 * even at the same time because we queue both TX status events and
373 * RX frames to be processed by a tasklet and process them in the
374 * same order that they were received or TX status last. Hence, there
375 * is no race as long as the frame RX is processed before the next TX
376 * status, which drivers can ensure, see below.
378 * Note that this can only happen if the hardware or firmware can
379 * actually add STAs to the filter list, if this is done by the
380 * driver in response to set_tim() (which will only reduce the race
381 * this whole filtering tries to solve, not completely solve it)
382 * this situation cannot happen.
384 * To completely solve this race drivers need to make sure that they
385 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
387 * (b) always process RX events before TX status events if ordering
388 * can be unknown, for example with different interrupt status
391 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
392 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
393 skb_queue_tail(&sta
->tx_filtered
, skb
);
397 if (!test_sta_flags(sta
, WLAN_STA_PS
) &&
398 !(info
->flags
& IEEE80211_TX_INTFL_RETRIED
)) {
399 /* Software retry the packet once */
400 info
->flags
|= IEEE80211_TX_INTFL_RETRIED
;
401 ieee80211_add_pending_skb(local
, skb
);
406 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
408 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
409 "queue_len=%d PS=%d @%lu\n",
410 wiphy_name(local
->hw
.wiphy
),
411 skb_queue_len(&sta
->tx_filtered
),
412 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
417 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
419 struct sk_buff
*skb2
;
420 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
421 struct ieee80211_local
*local
= hw_to_local(hw
);
422 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
425 struct ieee80211_supported_band
*sband
;
426 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
427 struct ieee80211_sub_if_data
*sdata
;
428 struct net_device
*prev_dev
= NULL
;
429 struct sta_info
*sta
;
430 int retry_count
= -1, i
;
432 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
433 /* the HW cannot have attempted that rate */
434 if (i
>= hw
->max_rates
) {
435 info
->status
.rates
[i
].idx
= -1;
436 info
->status
.rates
[i
].count
= 0;
439 retry_count
+= info
->status
.rates
[i
].count
;
446 sband
= local
->hw
.wiphy
->bands
[info
->band
];
448 sta
= sta_info_get(local
, hdr
->addr1
);
451 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
452 test_sta_flags(sta
, WLAN_STA_PS
)) {
454 * The STA is in power save mode, so assume
455 * that this TX packet failed because of that.
457 ieee80211_handle_filtered_frame(local
, sta
, skb
);
462 fc
= hdr
->frame_control
;
464 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
465 (ieee80211_is_data_qos(fc
))) {
469 qc
= ieee80211_get_qos_ctl(hdr
);
471 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
472 & IEEE80211_SCTL_SEQ
);
473 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
477 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
478 ieee80211_handle_filtered_frame(local
, sta
, skb
);
482 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
483 sta
->tx_retry_failed
++;
484 sta
->tx_retry_count
+= retry_count
;
487 rate_control_tx_status(local
, sband
, sta
, skb
);
492 ieee80211_led_tx(local
, 0);
495 * Fragments are passed to low-level drivers as separate skbs, so these
496 * are actually fragments, not frames. Update frame counters only for
497 * the first fragment of the frame. */
499 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
500 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
502 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
504 local
->dot11TransmittedFrameCount
++;
505 if (is_multicast_ether_addr(hdr
->addr1
))
506 local
->dot11MulticastTransmittedFrameCount
++;
508 local
->dot11RetryCount
++;
510 local
->dot11MultipleRetryCount
++;
513 /* This counter shall be incremented for an acknowledged MPDU
514 * with an individual address in the address 1 field or an MPDU
515 * with a multicast address in the address 1 field of type Data
517 if (!is_multicast_ether_addr(hdr
->addr1
) ||
518 type
== IEEE80211_FTYPE_DATA
||
519 type
== IEEE80211_FTYPE_MGMT
)
520 local
->dot11TransmittedFragmentCount
++;
523 local
->dot11FailedCount
++;
526 /* this was a transmitted frame, but now we want to reuse it */
530 * This is a bit racy but we can avoid a lot of work
533 if (!local
->monitors
&& !local
->cooked_mntrs
) {
538 /* send frame to monitor interfaces now */
540 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
541 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
546 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
547 skb_push(skb
, sizeof(*rthdr
));
549 memset(rthdr
, 0, sizeof(*rthdr
));
550 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
551 rthdr
->hdr
.it_present
=
552 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
553 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
554 (1 << IEEE80211_RADIOTAP_RATE
));
556 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
557 !is_multicast_ether_addr(hdr
->addr1
))
558 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
561 * XXX: Once radiotap gets the bitmap reset thing the vendor
562 * extensions proposal contains, we can actually report
563 * the whole set of tries we did.
565 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
566 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
567 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
568 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
569 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
570 if (info
->status
.rates
[0].idx
>= 0 &&
571 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
572 rthdr
->rate
= sband
->bitrates
[
573 info
->status
.rates
[0].idx
].bitrate
/ 5;
575 /* for now report the total retry_count */
576 rthdr
->data_retries
= retry_count
;
578 /* XXX: is this sufficient for BPF? */
579 skb_set_mac_header(skb
, 0);
580 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
581 skb
->pkt_type
= PACKET_OTHERHOST
;
582 skb
->protocol
= htons(ETH_P_802_2
);
583 memset(skb
->cb
, 0, sizeof(skb
->cb
));
586 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
587 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
588 if (!netif_running(sdata
->dev
))
592 skb2
= skb_clone(skb
, GFP_ATOMIC
);
594 skb2
->dev
= prev_dev
;
599 prev_dev
= sdata
->dev
;
610 EXPORT_SYMBOL(ieee80211_tx_status
);
612 static void ieee80211_restart_work(struct work_struct
*work
)
614 struct ieee80211_local
*local
=
615 container_of(work
, struct ieee80211_local
, restart_work
);
618 ieee80211_reconfig(local
);
622 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
624 struct ieee80211_local
*local
= hw_to_local(hw
);
626 /* use this reason, __ieee80211_resume will unblock it */
627 ieee80211_stop_queues_by_reason(hw
,
628 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
630 schedule_work(&local
->restart_work
);
632 EXPORT_SYMBOL(ieee80211_restart_hw
);
634 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
635 const struct ieee80211_ops
*ops
)
637 struct ieee80211_local
*local
;
641 /* Ensure 32-byte alignment of our private data and hw private data.
642 * We use the wiphy priv data for both our ieee80211_local and for
643 * the driver's private data
645 * In memory it'll be like this:
647 * +-------------------------+
649 * +-------------------------+
650 * | struct ieee80211_local |
651 * +-------------------------+
652 * | driver's private data |
653 * +-------------------------+
656 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
658 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
663 wiphy
->netnsok
= true;
664 wiphy
->privid
= mac80211_wiphy_privid
;
666 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
667 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
) -
668 sizeof(struct cfg80211_bss
);
670 local
= wiphy_priv(wiphy
);
672 local
->hw
.wiphy
= wiphy
;
674 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
679 BUG_ON(!ops
->config
);
680 BUG_ON(!ops
->add_interface
);
681 BUG_ON(!ops
->remove_interface
);
682 BUG_ON(!ops
->configure_filter
);
685 /* set up some defaults */
686 local
->hw
.queues
= 1;
687 local
->hw
.max_rates
= 1;
688 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
689 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
690 local
->hw
.conf
.radio_enabled
= true;
691 local
->user_power_level
= -1;
693 INIT_LIST_HEAD(&local
->interfaces
);
694 mutex_init(&local
->iflist_mtx
);
695 mutex_init(&local
->scan_mtx
);
697 spin_lock_init(&local
->key_lock
);
698 spin_lock_init(&local
->filter_lock
);
699 spin_lock_init(&local
->queue_stop_reason_lock
);
701 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
703 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
705 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
707 INIT_WORK(&local
->dynamic_ps_enable_work
,
708 ieee80211_dynamic_ps_enable_work
);
709 INIT_WORK(&local
->dynamic_ps_disable_work
,
710 ieee80211_dynamic_ps_disable_work
);
711 setup_timer(&local
->dynamic_ps_timer
,
712 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
714 sta_info_init(local
);
716 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++)
717 skb_queue_head_init(&local
->pending
[i
]);
718 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
719 (unsigned long)local
);
720 tasklet_disable(&local
->tx_pending_tasklet
);
722 tasklet_init(&local
->tasklet
,
723 ieee80211_tasklet_handler
,
724 (unsigned long) local
);
725 tasklet_disable(&local
->tasklet
);
727 skb_queue_head_init(&local
->skb_queue
);
728 skb_queue_head_init(&local
->skb_queue_unreliable
);
730 spin_lock_init(&local
->ampdu_lock
);
732 return local_to_hw(local
);
734 EXPORT_SYMBOL(ieee80211_alloc_hw
);
736 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
738 struct ieee80211_local
*local
= hw_to_local(hw
);
740 enum ieee80211_band band
;
741 int channels
, i
, j
, max_bitrates
;
743 static const u32 cipher_suites
[] = {
744 WLAN_CIPHER_SUITE_WEP40
,
745 WLAN_CIPHER_SUITE_WEP104
,
746 WLAN_CIPHER_SUITE_TKIP
,
747 WLAN_CIPHER_SUITE_CCMP
,
749 /* keep last -- depends on hw flags! */
750 WLAN_CIPHER_SUITE_AES_CMAC
754 * generic code guarantees at least one band,
755 * set this very early because much code assumes
756 * that hw.conf.channel is assigned
761 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
762 struct ieee80211_supported_band
*sband
;
764 sband
= local
->hw
.wiphy
->bands
[band
];
767 if (!local
->oper_channel
) {
768 /* init channel we're on */
769 local
->hw
.conf
.channel
=
770 local
->oper_channel
= &sband
->channels
[0];
771 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
773 channels
+= sband
->n_channels
;
775 if (max_bitrates
< sband
->n_bitrates
)
776 max_bitrates
= sband
->n_bitrates
;
777 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
780 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
781 sizeof(void *) * channels
, GFP_KERNEL
);
782 if (!local
->int_scan_req
)
785 /* if low-level driver supports AP, we also support VLAN */
786 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
787 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
789 /* mac80211 always supports monitor */
790 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
792 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
793 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
794 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
795 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
798 * Calculate scan IE length -- we need this to alloc
799 * memory and to subtract from the driver limit. It
800 * includes the (extended) supported rates and HT
801 * information -- SSID is the driver's responsibility.
803 local
->scan_ies_len
= 4 + max_bitrates
; /* (ext) supp rates */
805 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
807 if (!local
->ops
->hw_scan
) {
808 /* For hw_scan, driver needs to set these up. */
809 local
->hw
.wiphy
->max_scan_ssids
= 4;
810 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
814 * If the driver supports any scan IEs, then assume the
815 * limit includes the IEs mac80211 will add, otherwise
816 * leave it at zero and let the driver sort it out; we
817 * still pass our IEs to the driver but userspace will
818 * not be allowed to in that case.
820 if (local
->hw
.wiphy
->max_scan_ie_len
)
821 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
823 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
824 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
825 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
826 local
->hw
.wiphy
->n_cipher_suites
--;
828 result
= wiphy_register(local
->hw
.wiphy
);
830 goto fail_wiphy_register
;
833 * We use the number of queues for feature tests (QoS, HT) internally
834 * so restrict them appropriately.
836 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
837 hw
->queues
= IEEE80211_MAX_QUEUES
;
840 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
841 if (!local
->workqueue
) {
847 * The hardware needs headroom for sending the frame,
848 * and we need some headroom for passing the frame to monitor
849 * interfaces, but never both at the same time.
851 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
852 sizeof(struct ieee80211_tx_status_rtap_hdr
));
854 debugfs_hw_add(local
);
856 if (local
->hw
.max_listen_interval
== 0)
857 local
->hw
.max_listen_interval
= 1;
859 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
861 result
= sta_info_start(local
);
865 result
= ieee80211_wep_init(local
);
867 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
868 wiphy_name(local
->hw
.wiphy
), result
);
874 result
= ieee80211_init_rate_ctrl_alg(local
,
875 hw
->rate_control_algorithm
);
877 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
878 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
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
);
895 /* alloc internal scan request */
897 local
->int_scan_req
->ssids
= &local
->scan_ssid
;
898 local
->int_scan_req
->n_ssids
= 1;
899 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
900 if (!hw
->wiphy
->bands
[band
])
902 for (j
= 0; j
< hw
->wiphy
->bands
[band
]->n_channels
; j
++) {
903 local
->int_scan_req
->channels
[i
] =
904 &hw
->wiphy
->bands
[band
]->channels
[j
];
909 local
->network_latency_notifier
.notifier_call
=
910 ieee80211_max_network_latency
;
911 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
912 &local
->network_latency_notifier
);
922 ieee80211_led_exit(local
);
923 ieee80211_remove_interfaces(local
);
926 ieee80211_wep_free(local
);
928 sta_info_stop(local
);
930 debugfs_hw_del(local
);
931 destroy_workqueue(local
->workqueue
);
933 wiphy_unregister(local
->hw
.wiphy
);
935 kfree(local
->int_scan_req
->channels
);
938 EXPORT_SYMBOL(ieee80211_register_hw
);
940 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
942 struct ieee80211_local
*local
= hw_to_local(hw
);
944 tasklet_kill(&local
->tx_pending_tasklet
);
945 tasklet_kill(&local
->tasklet
);
947 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
948 &local
->network_latency_notifier
);
953 * At this point, interface list manipulations are fine
954 * because the driver cannot be handing us frames any
955 * more and the tasklet is killed.
957 ieee80211_remove_interfaces(local
);
961 cancel_work_sync(&local
->reconfig_filter
);
963 ieee80211_clear_tx_pending(local
);
964 sta_info_stop(local
);
965 rate_control_deinitialize(local
);
966 debugfs_hw_del(local
);
968 if (skb_queue_len(&local
->skb_queue
)
969 || skb_queue_len(&local
->skb_queue_unreliable
))
970 printk(KERN_WARNING
"%s: skb_queue not empty\n",
971 wiphy_name(local
->hw
.wiphy
));
972 skb_queue_purge(&local
->skb_queue
);
973 skb_queue_purge(&local
->skb_queue_unreliable
);
975 destroy_workqueue(local
->workqueue
);
976 wiphy_unregister(local
->hw
.wiphy
);
977 ieee80211_wep_free(local
);
978 ieee80211_led_exit(local
);
979 kfree(local
->int_scan_req
);
981 EXPORT_SYMBOL(ieee80211_unregister_hw
);
983 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
985 struct ieee80211_local
*local
= hw_to_local(hw
);
987 mutex_destroy(&local
->iflist_mtx
);
988 mutex_destroy(&local
->scan_mtx
);
990 wiphy_free(local
->hw
.wiphy
);
992 EXPORT_SYMBOL(ieee80211_free_hw
);
994 static int __init
ieee80211_init(void)
999 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1000 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1001 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1003 ret
= rc80211_minstrel_init();
1007 ret
= rc80211_pid_init();
1011 ieee80211_debugfs_netdev_init();
1016 static void __exit
ieee80211_exit(void)
1019 rc80211_minstrel_exit();
1022 * For key todo, it'll be empty by now but the work
1023 * might still be scheduled.
1025 flush_scheduled_work();
1030 ieee80211_debugfs_netdev_exit();
1034 subsys_initcall(ieee80211_init
);
1035 module_exit(ieee80211_exit
);
1037 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1038 MODULE_LICENSE("GPL");