2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <linux/pm_qos_params.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
28 #include "ieee80211_i.h"
37 #include "debugfs_netdev.h"
40 * For seeing transmitted packets on monitor interfaces
41 * we have a radiotap header too.
43 struct ieee80211_tx_status_rtap_hdr
{
44 struct ieee80211_radiotap_header hdr
;
49 } __attribute__ ((packed
));
52 /* must be called under mdev tx lock */
53 void ieee80211_configure_filter(struct ieee80211_local
*local
)
55 unsigned int changed_flags
;
56 unsigned int new_flags
= 0;
58 if (atomic_read(&local
->iff_promiscs
))
59 new_flags
|= FIF_PROMISC_IN_BSS
;
61 if (atomic_read(&local
->iff_allmultis
))
62 new_flags
|= FIF_ALLMULTI
;
65 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
67 if (local
->fif_fcsfail
)
68 new_flags
|= FIF_FCSFAIL
;
70 if (local
->fif_plcpfail
)
71 new_flags
|= FIF_PLCPFAIL
;
73 if (local
->fif_control
)
74 new_flags
|= FIF_CONTROL
;
76 if (local
->fif_other_bss
)
77 new_flags
|= FIF_OTHER_BSS
;
79 changed_flags
= local
->filter_flags
^ new_flags
;
84 local
->ops
->configure_filter(local_to_hw(local
),
85 changed_flags
, &new_flags
,
86 local
->mdev
->mc_count
,
87 local
->mdev
->mc_list
);
89 WARN_ON(new_flags
& (1<<31));
91 local
->filter_flags
= new_flags
& ~(1<<31);
94 /* master interface */
96 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
98 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
102 static const struct header_ops ieee80211_header_ops
= {
103 .create
= eth_header
,
104 .parse
= header_parse_80211
,
105 .rebuild
= eth_rebuild_header
,
106 .cache
= eth_header_cache
,
107 .cache_update
= eth_header_cache_update
,
110 static int ieee80211_master_open(struct net_device
*dev
)
112 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
113 struct ieee80211_local
*local
= mpriv
->local
;
114 struct ieee80211_sub_if_data
*sdata
;
115 int res
= -EOPNOTSUPP
;
117 /* we hold the RTNL here so can safely walk the list */
118 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
119 if (netif_running(sdata
->dev
)) {
128 netif_tx_start_all_queues(local
->mdev
);
133 static int ieee80211_master_stop(struct net_device
*dev
)
135 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
136 struct ieee80211_local
*local
= mpriv
->local
;
137 struct ieee80211_sub_if_data
*sdata
;
139 /* we hold the RTNL here so can safely walk the list */
140 list_for_each_entry(sdata
, &local
->interfaces
, list
)
141 if (netif_running(sdata
->dev
))
142 dev_close(sdata
->dev
);
147 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
149 struct ieee80211_master_priv
*mpriv
= netdev_priv(dev
);
150 struct ieee80211_local
*local
= mpriv
->local
;
152 ieee80211_configure_filter(local
);
155 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
157 struct ieee80211_channel
*chan
;
160 enum nl80211_channel_type channel_type
;
164 if (local
->sw_scanning
) {
165 chan
= local
->scan_channel
;
166 channel_type
= NL80211_CHAN_NO_HT
;
168 chan
= local
->oper_channel
;
169 channel_type
= local
->oper_channel_type
;
172 if (chan
!= local
->hw
.conf
.channel
||
173 channel_type
!= local
->hw
.conf
.channel_type
) {
174 local
->hw
.conf
.channel
= chan
;
175 local
->hw
.conf
.channel_type
= channel_type
;
176 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
179 if (local
->sw_scanning
)
180 power
= chan
->max_power
;
182 power
= local
->power_constr_level
?
183 (chan
->max_power
- local
->power_constr_level
) :
186 if (local
->user_power_level
>= 0)
187 power
= min(power
, local
->user_power_level
);
189 if (local
->hw
.conf
.power_level
!= power
) {
190 changed
|= IEEE80211_CONF_CHANGE_POWER
;
191 local
->hw
.conf
.power_level
= power
;
194 if (changed
&& local
->open_count
) {
195 ret
= local
->ops
->config(local_to_hw(local
), changed
);
198 * HW reconfiguration should never fail, the driver has told
199 * us what it can support so it should live up to that promise.
202 * rfkill is not integrated with mac80211 and a
203 * configuration command can thus fail if hardware rfkill
206 * FIXME: integrate rfkill with mac80211 and then add this
216 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
219 struct ieee80211_local
*local
= sdata
->local
;
224 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
225 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
226 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
227 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
228 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
229 sdata
->vif
.bss_conf
.bssid
= sdata
->dev
->dev_addr
;
230 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
231 static const u8 zero
[ETH_ALEN
] = { 0 };
232 sdata
->vif
.bss_conf
.bssid
= zero
;
238 switch (sdata
->vif
.type
) {
239 case NL80211_IFTYPE_AP
:
240 case NL80211_IFTYPE_ADHOC
:
241 case NL80211_IFTYPE_MESH_POINT
:
244 /* do not warn to simplify caller in scan.c */
245 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
246 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
251 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
252 if (local
->sw_scanning
) {
253 sdata
->vif
.bss_conf
.enable_beacon
= false;
256 * Beacon should be enabled, but AP mode must
257 * check whether there is a beacon configured.
259 switch (sdata
->vif
.type
) {
260 case NL80211_IFTYPE_AP
:
261 sdata
->vif
.bss_conf
.enable_beacon
=
262 !!rcu_dereference(sdata
->u
.ap
.beacon
);
264 case NL80211_IFTYPE_ADHOC
:
265 sdata
->vif
.bss_conf
.enable_beacon
=
266 !!rcu_dereference(sdata
->u
.ibss
.presp
);
268 case NL80211_IFTYPE_MESH_POINT
:
269 sdata
->vif
.bss_conf
.enable_beacon
= true;
279 if (local
->ops
->bss_info_changed
)
280 local
->ops
->bss_info_changed(local_to_hw(local
),
282 &sdata
->vif
.bss_conf
,
288 * ~changed is just there to not do this at resume time
290 if (changed
& BSS_CHANGED_BEACON_INT
&& ~changed
) {
291 local
->hw
.conf
.beacon_int
= sdata
->vif
.bss_conf
.beacon_int
;
292 ieee80211_hw_config(local
,
293 _IEEE80211_CONF_CHANGE_BEACON_INTERVAL
);
297 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
299 sdata
->vif
.bss_conf
.use_cts_prot
= false;
300 sdata
->vif
.bss_conf
.use_short_preamble
= false;
301 sdata
->vif
.bss_conf
.use_short_slot
= false;
302 return BSS_CHANGED_ERP_CTS_PROT
|
303 BSS_CHANGED_ERP_PREAMBLE
|
304 BSS_CHANGED_ERP_SLOT
;
307 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
310 struct ieee80211_local
*local
= hw_to_local(hw
);
311 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
314 skb
->dev
= local
->mdev
;
315 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
316 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
317 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
318 tmp
= skb_queue_len(&local
->skb_queue
) +
319 skb_queue_len(&local
->skb_queue_unreliable
);
320 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
321 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
322 dev_kfree_skb_irq(skb
);
324 I802_DEBUG_INC(local
->tx_status_drop
);
326 tasklet_schedule(&local
->tasklet
);
328 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
330 static void ieee80211_tasklet_handler(unsigned long data
)
332 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
334 struct ieee80211_rx_status rx_status
;
335 struct ieee80211_ra_tid
*ra_tid
;
337 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
338 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
339 switch (skb
->pkt_type
) {
340 case IEEE80211_RX_MSG
:
341 /* status is in skb->cb */
342 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
343 /* Clear skb->pkt_type in order to not confuse kernel
346 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
348 case IEEE80211_TX_STATUS_MSG
:
350 ieee80211_tx_status(local_to_hw(local
), skb
);
352 case IEEE80211_DELBA_MSG
:
353 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
354 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
355 ra_tid
->ra
, ra_tid
->tid
);
358 case IEEE80211_ADDBA_MSG
:
359 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
360 ieee80211_start_tx_ba_cb(local_to_hw(local
),
361 ra_tid
->ra
, ra_tid
->tid
);
365 WARN(1, "mac80211: Packet is of unknown type %d\n",
373 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
374 * make a prepared TX frame (one that has been given to hw) to look like brand
375 * new IEEE 802.11 frame that is ready to go through TX processing again.
377 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
378 struct ieee80211_key
*key
,
381 unsigned int hdrlen
, iv_len
, mic_len
;
382 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
384 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
389 switch (key
->conf
.alg
) {
392 mic_len
= WEP_ICV_LEN
;
395 iv_len
= TKIP_IV_LEN
;
396 mic_len
= TKIP_ICV_LEN
;
399 iv_len
= CCMP_HDR_LEN
;
400 mic_len
= CCMP_MIC_LEN
;
406 if (skb
->len
>= hdrlen
+ mic_len
&&
407 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
408 skb_trim(skb
, skb
->len
- mic_len
);
409 if (skb
->len
>= hdrlen
+ iv_len
) {
410 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
411 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
415 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
416 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
417 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
418 hdrlen
- IEEE80211_QOS_CTL_LEN
);
419 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
423 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
424 struct sta_info
*sta
,
427 sta
->tx_filtered_count
++;
430 * Clear the TX filter mask for this STA when sending the next
431 * packet. If the STA went to power save mode, this will happen
432 * when it wakes up for the next time.
434 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
437 * This code races in the following way:
439 * (1) STA sends frame indicating it will go to sleep and does so
440 * (2) hardware/firmware adds STA to filter list, passes frame up
441 * (3) hardware/firmware processes TX fifo and suppresses a frame
442 * (4) we get TX status before having processed the frame and
443 * knowing that the STA has gone to sleep.
445 * This is actually quite unlikely even when both those events are
446 * processed from interrupts coming in quickly after one another or
447 * even at the same time because we queue both TX status events and
448 * RX frames to be processed by a tasklet and process them in the
449 * same order that they were received or TX status last. Hence, there
450 * is no race as long as the frame RX is processed before the next TX
451 * status, which drivers can ensure, see below.
453 * Note that this can only happen if the hardware or firmware can
454 * actually add STAs to the filter list, if this is done by the
455 * driver in response to set_tim() (which will only reduce the race
456 * this whole filtering tries to solve, not completely solve it)
457 * this situation cannot happen.
459 * To completely solve this race drivers need to make sure that they
460 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
462 * (b) always process RX events before TX status events if ordering
463 * can be unknown, for example with different interrupt status
466 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
467 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
468 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
469 skb_queue_tail(&sta
->tx_filtered
, skb
);
473 if (!test_sta_flags(sta
, WLAN_STA_PS
) && !skb
->requeue
) {
474 /* Software retry the packet once */
476 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
481 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
483 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
484 "queue_len=%d PS=%d @%lu\n",
485 wiphy_name(local
->hw
.wiphy
),
486 skb_queue_len(&sta
->tx_filtered
),
487 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
492 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
494 struct sk_buff
*skb2
;
495 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
496 struct ieee80211_local
*local
= hw_to_local(hw
);
497 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
500 struct ieee80211_supported_band
*sband
;
501 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
502 struct ieee80211_sub_if_data
*sdata
;
503 struct net_device
*prev_dev
= NULL
;
504 struct sta_info
*sta
;
505 int retry_count
= -1, i
;
507 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
508 /* the HW cannot have attempted that rate */
509 if (i
>= hw
->max_rates
) {
510 info
->status
.rates
[i
].idx
= -1;
511 info
->status
.rates
[i
].count
= 0;
514 retry_count
+= info
->status
.rates
[i
].count
;
521 sband
= local
->hw
.wiphy
->bands
[info
->band
];
523 sta
= sta_info_get(local
, hdr
->addr1
);
526 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
527 test_sta_flags(sta
, WLAN_STA_PS
)) {
529 * The STA is in power save mode, so assume
530 * that this TX packet failed because of that.
532 ieee80211_handle_filtered_frame(local
, sta
, skb
);
537 fc
= hdr
->frame_control
;
539 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
540 (ieee80211_is_data_qos(fc
))) {
544 qc
= ieee80211_get_qos_ctl(hdr
);
546 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
547 & IEEE80211_SCTL_SEQ
);
548 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
552 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
553 ieee80211_handle_filtered_frame(local
, sta
, skb
);
557 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
))
558 sta
->tx_retry_failed
++;
559 sta
->tx_retry_count
+= retry_count
;
562 rate_control_tx_status(local
, sband
, sta
, skb
);
567 ieee80211_led_tx(local
, 0);
570 * Fragments are passed to low-level drivers as separate skbs, so these
571 * are actually fragments, not frames. Update frame counters only for
572 * the first fragment of the frame. */
574 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
575 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
577 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
579 local
->dot11TransmittedFrameCount
++;
580 if (is_multicast_ether_addr(hdr
->addr1
))
581 local
->dot11MulticastTransmittedFrameCount
++;
583 local
->dot11RetryCount
++;
585 local
->dot11MultipleRetryCount
++;
588 /* This counter shall be incremented for an acknowledged MPDU
589 * with an individual address in the address 1 field or an MPDU
590 * with a multicast address in the address 1 field of type Data
592 if (!is_multicast_ether_addr(hdr
->addr1
) ||
593 type
== IEEE80211_FTYPE_DATA
||
594 type
== IEEE80211_FTYPE_MGMT
)
595 local
->dot11TransmittedFragmentCount
++;
598 local
->dot11FailedCount
++;
601 /* this was a transmitted frame, but now we want to reuse it */
605 * This is a bit racy but we can avoid a lot of work
608 if (!local
->monitors
&& !local
->cooked_mntrs
) {
613 /* send frame to monitor interfaces now */
615 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
616 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
621 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
622 skb_push(skb
, sizeof(*rthdr
));
624 memset(rthdr
, 0, sizeof(*rthdr
));
625 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
626 rthdr
->hdr
.it_present
=
627 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
628 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
) |
629 (1 << IEEE80211_RADIOTAP_RATE
));
631 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
632 !is_multicast_ether_addr(hdr
->addr1
))
633 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
636 * XXX: Once radiotap gets the bitmap reset thing the vendor
637 * extensions proposal contains, we can actually report
638 * the whole set of tries we did.
640 if ((info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
) ||
641 (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
))
642 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
643 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
644 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
645 if (info
->status
.rates
[0].idx
>= 0 &&
646 !(info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
))
647 rthdr
->rate
= sband
->bitrates
[
648 info
->status
.rates
[0].idx
].bitrate
/ 5;
650 /* for now report the total retry_count */
651 rthdr
->data_retries
= retry_count
;
653 /* XXX: is this sufficient for BPF? */
654 skb_set_mac_header(skb
, 0);
655 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
656 skb
->pkt_type
= PACKET_OTHERHOST
;
657 skb
->protocol
= htons(ETH_P_802_2
);
658 memset(skb
->cb
, 0, sizeof(skb
->cb
));
661 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
662 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
663 if (!netif_running(sdata
->dev
))
667 skb2
= skb_clone(skb
, GFP_ATOMIC
);
669 skb2
->dev
= prev_dev
;
674 prev_dev
= sdata
->dev
;
685 EXPORT_SYMBOL(ieee80211_tx_status
);
687 static void ieee80211_restart_work(struct work_struct
*work
)
689 struct ieee80211_local
*local
=
690 container_of(work
, struct ieee80211_local
, restart_work
);
693 ieee80211_reconfig(local
);
697 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
699 struct ieee80211_local
*local
= hw_to_local(hw
);
701 /* use this reason, __ieee80211_resume will unblock it */
702 ieee80211_stop_queues_by_reason(hw
,
703 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
705 schedule_work(&local
->restart_work
);
707 EXPORT_SYMBOL(ieee80211_restart_hw
);
709 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
710 const struct ieee80211_ops
*ops
)
712 struct ieee80211_local
*local
;
716 /* Ensure 32-byte alignment of our private data and hw private data.
717 * We use the wiphy priv data for both our ieee80211_local and for
718 * the driver's private data
720 * In memory it'll be like this:
722 * +-------------------------+
724 * +-------------------------+
725 * | struct ieee80211_local |
726 * +-------------------------+
727 * | driver's private data |
728 * +-------------------------+
731 priv_size
= ((sizeof(struct ieee80211_local
) +
732 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
735 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
740 wiphy
->privid
= mac80211_wiphy_privid
;
742 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
743 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
) -
744 sizeof(struct cfg80211_bss
);
746 local
= wiphy_priv(wiphy
);
748 local
->hw
.wiphy
= wiphy
;
750 local
->hw
.priv
= (char *)local
+
751 ((sizeof(struct ieee80211_local
) +
752 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
757 BUG_ON(!ops
->config
);
758 BUG_ON(!ops
->add_interface
);
759 BUG_ON(!ops
->remove_interface
);
760 BUG_ON(!ops
->configure_filter
);
763 /* set up some defaults */
764 local
->hw
.queues
= 1;
765 local
->hw
.max_rates
= 1;
766 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
767 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
768 local
->hw
.conf
.radio_enabled
= true;
769 local
->user_power_level
= -1;
771 INIT_LIST_HEAD(&local
->interfaces
);
772 mutex_init(&local
->iflist_mtx
);
773 mutex_init(&local
->scan_mtx
);
775 spin_lock_init(&local
->key_lock
);
777 spin_lock_init(&local
->queue_stop_reason_lock
);
779 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
781 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
783 INIT_WORK(&local
->dynamic_ps_enable_work
,
784 ieee80211_dynamic_ps_enable_work
);
785 INIT_WORK(&local
->dynamic_ps_disable_work
,
786 ieee80211_dynamic_ps_disable_work
);
787 setup_timer(&local
->dynamic_ps_timer
,
788 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
790 sta_info_init(local
);
792 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++)
793 skb_queue_head_init(&local
->pending
[i
]);
794 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
795 (unsigned long)local
);
796 tasklet_disable(&local
->tx_pending_tasklet
);
798 tasklet_init(&local
->tasklet
,
799 ieee80211_tasklet_handler
,
800 (unsigned long) local
);
801 tasklet_disable(&local
->tasklet
);
803 skb_queue_head_init(&local
->skb_queue
);
804 skb_queue_head_init(&local
->skb_queue_unreliable
);
806 spin_lock_init(&local
->ampdu_lock
);
808 return local_to_hw(local
);
810 EXPORT_SYMBOL(ieee80211_alloc_hw
);
812 static const struct net_device_ops ieee80211_master_ops
= {
813 .ndo_start_xmit
= ieee80211_master_start_xmit
,
814 .ndo_open
= ieee80211_master_open
,
815 .ndo_stop
= ieee80211_master_stop
,
816 .ndo_set_multicast_list
= ieee80211_master_set_multicast_list
,
817 .ndo_select_queue
= ieee80211_select_queue
,
820 static void ieee80211_master_setup(struct net_device
*mdev
)
822 mdev
->type
= ARPHRD_IEEE80211
;
823 mdev
->netdev_ops
= &ieee80211_master_ops
;
824 mdev
->header_ops
= &ieee80211_header_ops
;
825 mdev
->tx_queue_len
= 1000;
826 mdev
->addr_len
= ETH_ALEN
;
829 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
831 struct ieee80211_local
*local
= hw_to_local(hw
);
833 enum ieee80211_band band
;
834 struct net_device
*mdev
;
835 struct ieee80211_master_priv
*mpriv
;
836 int channels
, i
, j
, max_bitrates
;
838 static const u32 cipher_suites
[] = {
839 WLAN_CIPHER_SUITE_WEP40
,
840 WLAN_CIPHER_SUITE_WEP104
,
841 WLAN_CIPHER_SUITE_TKIP
,
842 WLAN_CIPHER_SUITE_CCMP
,
844 /* keep last -- depends on hw flags! */
845 WLAN_CIPHER_SUITE_AES_CMAC
849 * generic code guarantees at least one band,
850 * set this very early because much code assumes
851 * that hw.conf.channel is assigned
856 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
857 struct ieee80211_supported_band
*sband
;
859 sband
= local
->hw
.wiphy
->bands
[band
];
862 if (!local
->oper_channel
) {
863 /* init channel we're on */
864 local
->hw
.conf
.channel
=
865 local
->oper_channel
=
866 local
->scan_channel
= &sband
->channels
[0];
868 channels
+= sband
->n_channels
;
870 if (max_bitrates
< sband
->n_bitrates
)
871 max_bitrates
= sband
->n_bitrates
;
872 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
875 local
->int_scan_req
.n_channels
= channels
;
876 local
->int_scan_req
.channels
= kzalloc(sizeof(void *) * channels
, GFP_KERNEL
);
877 if (!local
->int_scan_req
.channels
)
880 /* if low-level driver supports AP, we also support VLAN */
881 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
882 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
884 /* mac80211 always supports monitor */
885 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
887 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
888 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
889 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
890 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
893 * Calculate scan IE length -- we need this to alloc
894 * memory and to subtract from the driver limit. It
895 * includes the (extended) supported rates and HT
896 * information -- SSID is the driver's responsibility.
898 local
->scan_ies_len
= 4 + max_bitrates
; /* (ext) supp rates */
900 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
902 if (!local
->ops
->hw_scan
) {
903 /* For hw_scan, driver needs to set these up. */
904 local
->hw
.wiphy
->max_scan_ssids
= 4;
905 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
909 * If the driver supports any scan IEs, then assume the
910 * limit includes the IEs mac80211 will add, otherwise
911 * leave it at zero and let the driver sort it out; we
912 * still pass our IEs to the driver but userspace will
913 * not be allowed to in that case.
915 if (local
->hw
.wiphy
->max_scan_ie_len
)
916 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
918 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
919 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
920 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
921 local
->hw
.wiphy
->n_cipher_suites
--;
923 result
= wiphy_register(local
->hw
.wiphy
);
925 goto fail_wiphy_register
;
928 * We use the number of queues for feature tests (QoS, HT) internally
929 * so restrict them appropriately.
931 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
932 hw
->queues
= IEEE80211_MAX_QUEUES
;
934 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_master_priv
),
935 "wmaster%d", ieee80211_master_setup
,
938 goto fail_mdev_alloc
;
940 mpriv
= netdev_priv(mdev
);
941 mpriv
->local
= local
;
944 local
->hw
.workqueue
=
945 create_singlethread_workqueue(wiphy_name(local
->hw
.wiphy
));
946 if (!local
->hw
.workqueue
) {
952 * The hardware needs headroom for sending the frame,
953 * and we need some headroom for passing the frame to monitor
954 * interfaces, but never both at the same time.
956 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
957 sizeof(struct ieee80211_tx_status_rtap_hdr
));
959 debugfs_hw_add(local
);
961 if (local
->hw
.max_listen_interval
== 0)
962 local
->hw
.max_listen_interval
= 1;
964 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
966 result
= sta_info_start(local
);
970 result
= ieee80211_wep_init(local
);
972 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
973 wiphy_name(local
->hw
.wiphy
), result
);
978 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
982 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
983 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
984 local
->mdev
->features
|= NETIF_F_NETNS_LOCAL
;
986 result
= register_netdevice(local
->mdev
);
990 result
= ieee80211_init_rate_ctrl_alg(local
,
991 hw
->rate_control_algorithm
);
993 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
994 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
998 /* add one default STA interface if supported */
999 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
1000 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
1001 NL80211_IFTYPE_STATION
, NULL
);
1003 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1004 wiphy_name(local
->hw
.wiphy
));
1009 ieee80211_led_init(local
);
1011 /* alloc internal scan request */
1013 local
->int_scan_req
.ssids
= &local
->scan_ssid
;
1014 local
->int_scan_req
.n_ssids
= 1;
1015 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1016 if (!hw
->wiphy
->bands
[band
])
1018 for (j
= 0; j
< hw
->wiphy
->bands
[band
]->n_channels
; j
++) {
1019 local
->int_scan_req
.channels
[i
] =
1020 &hw
->wiphy
->bands
[band
]->channels
[j
];
1025 local
->network_latency_notifier
.notifier_call
=
1026 ieee80211_max_network_latency
;
1027 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
1028 &local
->network_latency_notifier
);
1038 ieee80211_led_exit(local
);
1039 ieee80211_remove_interfaces(local
);
1041 unregister_netdevice(local
->mdev
);
1045 ieee80211_wep_free(local
);
1047 sta_info_stop(local
);
1049 debugfs_hw_del(local
);
1050 destroy_workqueue(local
->hw
.workqueue
);
1053 free_netdev(local
->mdev
);
1055 wiphy_unregister(local
->hw
.wiphy
);
1056 fail_wiphy_register
:
1057 kfree(local
->int_scan_req
.channels
);
1060 EXPORT_SYMBOL(ieee80211_register_hw
);
1062 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1064 struct ieee80211_local
*local
= hw_to_local(hw
);
1066 tasklet_kill(&local
->tx_pending_tasklet
);
1067 tasklet_kill(&local
->tasklet
);
1069 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1070 &local
->network_latency_notifier
);
1075 * At this point, interface list manipulations are fine
1076 * because the driver cannot be handing us frames any
1077 * more and the tasklet is killed.
1080 /* First, we remove all virtual interfaces. */
1081 ieee80211_remove_interfaces(local
);
1083 /* then, finally, remove the master interface */
1084 unregister_netdevice(local
->mdev
);
1088 ieee80211_clear_tx_pending(local
);
1089 sta_info_stop(local
);
1090 rate_control_deinitialize(local
);
1091 debugfs_hw_del(local
);
1093 if (skb_queue_len(&local
->skb_queue
)
1094 || skb_queue_len(&local
->skb_queue_unreliable
))
1095 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1096 wiphy_name(local
->hw
.wiphy
));
1097 skb_queue_purge(&local
->skb_queue
);
1098 skb_queue_purge(&local
->skb_queue_unreliable
);
1100 destroy_workqueue(local
->hw
.workqueue
);
1101 wiphy_unregister(local
->hw
.wiphy
);
1102 ieee80211_wep_free(local
);
1103 ieee80211_led_exit(local
);
1104 free_netdev(local
->mdev
);
1105 kfree(local
->int_scan_req
.channels
);
1107 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1109 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1111 struct ieee80211_local
*local
= hw_to_local(hw
);
1113 mutex_destroy(&local
->iflist_mtx
);
1114 mutex_destroy(&local
->scan_mtx
);
1116 wiphy_free(local
->hw
.wiphy
);
1118 EXPORT_SYMBOL(ieee80211_free_hw
);
1120 static int __init
ieee80211_init(void)
1122 struct sk_buff
*skb
;
1125 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1126 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1127 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1129 ret
= rc80211_minstrel_init();
1133 ret
= rc80211_pid_init();
1137 ieee80211_debugfs_netdev_init();
1142 static void __exit
ieee80211_exit(void)
1145 rc80211_minstrel_exit();
1148 * For key todo, it'll be empty by now but the work
1149 * might still be scheduled.
1151 flush_scheduled_work();
1156 ieee80211_debugfs_netdev_exit();
1160 subsys_initcall(ieee80211_init
);
1161 module_exit(ieee80211_exit
);
1163 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1164 MODULE_LICENSE("GPL");