2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/export.h>
14 #include <linux/etherdevice.h>
15 #include <net/mac80211.h>
16 #include <asm/unaligned.h>
17 #include "ieee80211_i.h"
24 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
27 struct ieee80211_local
*local
= hw_to_local(hw
);
28 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
31 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
32 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
33 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
34 tmp
= skb_queue_len(&local
->skb_queue
) +
35 skb_queue_len(&local
->skb_queue_unreliable
);
36 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
37 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
38 ieee80211_free_txskb(hw
, skb
);
40 I802_DEBUG_INC(local
->tx_status_drop
);
42 tasklet_schedule(&local
->tasklet
);
44 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
46 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
50 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
51 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
54 if (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
) {
55 ieee80211_free_txskb(&local
->hw
, skb
);
60 * This skb 'survived' a round-trip through the driver, and
61 * hopefully the driver didn't mangle it too badly. However,
62 * we can definitely not rely on the control information
63 * being correct. Clear it so we don't get junk there, and
64 * indicate that it needs new processing, but must not be
65 * modified/encrypted again.
67 memset(&info
->control
, 0, sizeof(info
->control
));
69 info
->control
.jiffies
= jiffies
;
70 info
->control
.vif
= &sta
->sdata
->vif
;
71 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
|
72 IEEE80211_TX_INTFL_RETRANSMISSION
;
73 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
75 sta
->status_stats
.filtered
++;
78 * Clear more-data bit on filtered frames, it might be set
79 * but later frames might time out so it might have to be
80 * clear again ... It's all rather unlikely (this frame
81 * should time out first, right?) but let's not confuse
82 * peers unnecessarily.
84 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_MOREDATA
))
85 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
87 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
88 u8
*p
= ieee80211_get_qos_ctl(hdr
);
89 int tid
= *p
& IEEE80211_QOS_CTL_TID_MASK
;
92 * Clear EOSP if set, this could happen e.g.
93 * if an absence period (us being a P2P GO)
96 if (*p
& IEEE80211_QOS_CTL_EOSP
)
97 *p
&= ~IEEE80211_QOS_CTL_EOSP
;
98 ac
= ieee80211_ac_from_tid(tid
);
100 ac
= IEEE80211_AC_BE
;
104 * Clear the TX filter mask for this STA when sending the next
105 * packet. If the STA went to power save mode, this will happen
106 * when it wakes up for the next time.
108 set_sta_flag(sta
, WLAN_STA_CLEAR_PS_FILT
);
109 ieee80211_clear_fast_xmit(sta
);
112 * This code races in the following way:
114 * (1) STA sends frame indicating it will go to sleep and does so
115 * (2) hardware/firmware adds STA to filter list, passes frame up
116 * (3) hardware/firmware processes TX fifo and suppresses a frame
117 * (4) we get TX status before having processed the frame and
118 * knowing that the STA has gone to sleep.
120 * This is actually quite unlikely even when both those events are
121 * processed from interrupts coming in quickly after one another or
122 * even at the same time because we queue both TX status events and
123 * RX frames to be processed by a tasklet and process them in the
124 * same order that they were received or TX status last. Hence, there
125 * is no race as long as the frame RX is processed before the next TX
126 * status, which drivers can ensure, see below.
128 * Note that this can only happen if the hardware or firmware can
129 * actually add STAs to the filter list, if this is done by the
130 * driver in response to set_tim() (which will only reduce the race
131 * this whole filtering tries to solve, not completely solve it)
132 * this situation cannot happen.
134 * To completely solve this race drivers need to make sure that they
135 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
137 * (b) always process RX events before TX status events if ordering
138 * can be unknown, for example with different interrupt status
140 * (c) if PS mode transitions are manual (i.e. the flag
141 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
142 * changes before calling TX status events if ordering can be
145 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
146 skb_queue_len(&sta
->tx_filtered
[ac
]) < STA_MAX_TX_BUFFER
) {
147 skb_queue_tail(&sta
->tx_filtered
[ac
], skb
);
148 sta_info_recalc_tim(sta
);
150 if (!timer_pending(&local
->sta_cleanup
))
151 mod_timer(&local
->sta_cleanup
,
152 round_jiffies(jiffies
+
153 STA_INFO_CLEANUP_INTERVAL
));
157 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
158 !(info
->flags
& IEEE80211_TX_INTFL_RETRIED
)) {
159 /* Software retry the packet once */
160 info
->flags
|= IEEE80211_TX_INTFL_RETRIED
;
161 ieee80211_add_pending_skb(local
, skb
);
165 ps_dbg_ratelimited(sta
->sdata
,
166 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
167 skb_queue_len(&sta
->tx_filtered
[ac
]),
168 !!test_sta_flag(sta
, WLAN_STA_PS_STA
), jiffies
);
169 ieee80211_free_txskb(&local
->hw
, skb
);
172 static void ieee80211_check_pending_bar(struct sta_info
*sta
, u8
*addr
, u8 tid
)
174 struct tid_ampdu_tx
*tid_tx
;
176 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
177 if (!tid_tx
|| !tid_tx
->bar_pending
)
180 tid_tx
->bar_pending
= false;
181 ieee80211_send_bar(&sta
->sdata
->vif
, addr
, tid
, tid_tx
->failed_bar_ssn
);
184 static void ieee80211_frame_acked(struct sta_info
*sta
, struct sk_buff
*skb
)
186 struct ieee80211_mgmt
*mgmt
= (void *) skb
->data
;
187 struct ieee80211_local
*local
= sta
->local
;
188 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
190 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
191 sta
->status_stats
.last_ack
= jiffies
;
193 if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
194 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
195 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
196 u16 tid
= qc
[0] & 0xf;
198 ieee80211_check_pending_bar(sta
, hdr
->addr1
, tid
);
201 if (ieee80211_is_action(mgmt
->frame_control
) &&
202 mgmt
->u
.action
.category
== WLAN_CATEGORY_HT
&&
203 mgmt
->u
.action
.u
.ht_smps
.action
== WLAN_HT_ACTION_SMPS
&&
204 ieee80211_sdata_running(sdata
)) {
205 enum ieee80211_smps_mode smps_mode
;
207 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
208 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
209 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
211 case WLAN_HT_SMPS_CONTROL_STATIC
:
212 smps_mode
= IEEE80211_SMPS_STATIC
;
214 case WLAN_HT_SMPS_CONTROL_DISABLED
:
215 default: /* shouldn't happen since we don't send that */
216 smps_mode
= IEEE80211_SMPS_OFF
;
220 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
222 * This update looks racy, but isn't -- if we come
223 * here we've definitely got a station that we're
224 * talking to, and on a managed interface that can
225 * only be the AP. And the only other place updating
226 * this variable in managed mode is before association.
228 sdata
->smps_mode
= smps_mode
;
229 ieee80211_queue_work(&local
->hw
, &sdata
->recalc_smps
);
230 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
231 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
232 sta
->known_smps_mode
= smps_mode
;
237 static void ieee80211_set_bar_pending(struct sta_info
*sta
, u8 tid
, u16 ssn
)
239 struct tid_ampdu_tx
*tid_tx
;
241 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
245 tid_tx
->failed_bar_ssn
= ssn
;
246 tid_tx
->bar_pending
= true;
249 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info
*info
)
251 int len
= sizeof(struct ieee80211_radiotap_header
);
253 /* IEEE80211_RADIOTAP_RATE rate */
254 if (info
->status
.rates
[0].idx
>= 0 &&
255 !(info
->status
.rates
[0].flags
& (IEEE80211_TX_RC_MCS
|
256 IEEE80211_TX_RC_VHT_MCS
)))
259 /* IEEE80211_RADIOTAP_TX_FLAGS */
262 /* IEEE80211_RADIOTAP_DATA_RETRIES */
265 /* IEEE80211_RADIOTAP_MCS
266 * IEEE80211_RADIOTAP_VHT */
267 if (info
->status
.rates
[0].idx
>= 0) {
268 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
)
270 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_VHT_MCS
)
271 len
= ALIGN(len
, 2) + 12;
278 ieee80211_add_tx_radiotap_header(struct ieee80211_local
*local
,
279 struct ieee80211_supported_band
*sband
,
280 struct sk_buff
*skb
, int retry_count
,
281 int rtap_len
, int shift
)
283 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
284 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
285 struct ieee80211_radiotap_header
*rthdr
;
289 rthdr
= (struct ieee80211_radiotap_header
*) skb_push(skb
, rtap_len
);
291 memset(rthdr
, 0, rtap_len
);
292 rthdr
->it_len
= cpu_to_le16(rtap_len
);
294 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
295 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
296 pos
= (unsigned char *)(rthdr
+ 1);
299 * XXX: Once radiotap gets the bitmap reset thing the vendor
300 * extensions proposal contains, we can actually report
301 * the whole set of tries we did.
304 /* IEEE80211_RADIOTAP_RATE */
305 if (info
->status
.rates
[0].idx
>= 0 &&
306 !(info
->status
.rates
[0].flags
& (IEEE80211_TX_RC_MCS
|
307 IEEE80211_TX_RC_VHT_MCS
))) {
310 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
311 rate
= sband
->bitrates
[info
->status
.rates
[0].idx
].bitrate
;
312 *pos
= DIV_ROUND_UP(rate
, 5 * (1 << shift
));
313 /* padding for tx flags */
317 /* IEEE80211_RADIOTAP_TX_FLAGS */
319 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
320 !is_multicast_ether_addr(hdr
->addr1
))
321 txflags
|= IEEE80211_RADIOTAP_F_TX_FAIL
;
323 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
)
324 txflags
|= IEEE80211_RADIOTAP_F_TX_CTS
;
325 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
326 txflags
|= IEEE80211_RADIOTAP_F_TX_RTS
;
328 put_unaligned_le16(txflags
, pos
);
331 /* IEEE80211_RADIOTAP_DATA_RETRIES */
332 /* for now report the total retry_count */
336 if (info
->status
.rates
[0].idx
< 0)
339 /* IEEE80211_RADIOTAP_MCS
340 * IEEE80211_RADIOTAP_VHT */
341 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
) {
342 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
343 pos
[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
344 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
345 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
346 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_SHORT_GI
)
347 pos
[1] |= IEEE80211_RADIOTAP_MCS_SGI
;
348 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
349 pos
[1] |= IEEE80211_RADIOTAP_MCS_BW_40
;
350 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_GREEN_FIELD
)
351 pos
[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF
;
352 pos
[2] = info
->status
.rates
[0].idx
;
354 } else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_VHT_MCS
) {
355 u16 known
= local
->hw
.radiotap_vht_details
&
356 (IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
357 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
);
359 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
361 /* required alignment from rthdr */
362 pos
= (u8
*)rthdr
+ ALIGN(pos
- (u8
*)rthdr
, 2);
364 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
365 put_unaligned_le16(known
, pos
);
368 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
369 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_SHORT_GI
)
370 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
374 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
376 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_80_MHZ_WIDTH
)
378 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_160_MHZ_WIDTH
)
380 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
385 *pos
= (ieee80211_rate_get_vht_mcs(&info
->status
.rates
[0]) << 4) |
386 ieee80211_rate_get_vht_nss(&info
->status
.rates
[0]);
393 /* u16 partial_aid */
399 * Handles the tx for TDLS teardown frames.
400 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
402 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local
*local
,
403 struct ieee80211_sub_if_data
*sdata
,
404 struct sk_buff
*skb
, u32 flags
)
406 struct sk_buff
*teardown_skb
;
407 struct sk_buff
*orig_teardown_skb
;
408 bool is_teardown
= false;
410 /* Get the teardown data we need and free the lock */
411 spin_lock(&sdata
->u
.mgd
.teardown_lock
);
412 teardown_skb
= sdata
->u
.mgd
.teardown_skb
;
413 orig_teardown_skb
= sdata
->u
.mgd
.orig_teardown_skb
;
414 if ((skb
== orig_teardown_skb
) && teardown_skb
) {
415 sdata
->u
.mgd
.teardown_skb
= NULL
;
416 sdata
->u
.mgd
.orig_teardown_skb
= NULL
;
419 spin_unlock(&sdata
->u
.mgd
.teardown_lock
);
422 /* This mechanism relies on being able to get ACKs */
423 WARN_ON(!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
));
425 /* Check if peer has ACKed */
426 if (flags
& IEEE80211_TX_STAT_ACK
) {
427 dev_kfree_skb_any(teardown_skb
);
430 "TDLS Resending teardown through AP\n");
432 ieee80211_subif_start_xmit(teardown_skb
, skb
->dev
);
437 static struct ieee80211_sub_if_data
*
438 ieee80211_sdata_from_skb(struct ieee80211_local
*local
, struct sk_buff
*skb
)
440 struct ieee80211_sub_if_data
*sdata
;
443 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
447 if (skb
->dev
== sdata
->dev
)
454 return rcu_dereference(local
->p2p_sdata
);
457 static void ieee80211_report_ack_skb(struct ieee80211_local
*local
,
458 struct ieee80211_tx_info
*info
,
459 bool acked
, bool dropped
)
464 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
465 skb
= idr_find(&local
->ack_status_frames
, info
->ack_frame_id
);
467 idr_remove(&local
->ack_status_frames
, info
->ack_frame_id
);
468 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
474 dev_kfree_skb_any(skb
);
478 if (info
->flags
& IEEE80211_TX_INTFL_NL80211_FRAME_TX
) {
479 u64 cookie
= IEEE80211_SKB_CB(skb
)->ack
.cookie
;
480 struct ieee80211_sub_if_data
*sdata
;
481 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
484 sdata
= ieee80211_sdata_from_skb(local
, skb
);
486 if (ieee80211_is_nullfunc(hdr
->frame_control
) ||
487 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
488 cfg80211_probe_status(sdata
->dev
, hdr
->addr1
,
492 cfg80211_mgmt_tx_status(&sdata
->wdev
, cookie
,
498 dev_kfree_skb_any(skb
);
501 skb_complete_wifi_ack(skb
, acked
);
505 static void ieee80211_report_used_skb(struct ieee80211_local
*local
,
506 struct sk_buff
*skb
, bool dropped
)
508 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
509 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
510 bool acked
= info
->flags
& IEEE80211_TX_STAT_ACK
;
515 if (info
->flags
& IEEE80211_TX_INTFL_MLME_CONN_TX
) {
516 struct ieee80211_sub_if_data
*sdata
;
520 sdata
= ieee80211_sdata_from_skb(local
, skb
);
525 unsigned int hdr_size
=
526 ieee80211_hdrlen(hdr
->frame_control
);
528 /* Check to see if packet is a TDLS teardown packet */
529 if (ieee80211_is_data(hdr
->frame_control
) &&
530 (ieee80211_get_tdls_action(skb
, hdr_size
) ==
532 ieee80211_tdls_td_tx_handle(local
, sdata
, skb
,
535 ieee80211_mgd_conn_tx_status(sdata
,
541 } else if (info
->ack_frame_id
) {
542 ieee80211_report_ack_skb(local
, info
, acked
, dropped
);
545 if (!dropped
&& skb
->destructor
) {
546 skb
->wifi_acked_valid
= 1;
547 skb
->wifi_acked
= acked
;
552 * Use a static threshold for now, best value to be determined
554 * Should it depend on:
555 * - on # of retransmissions
556 * - current throughput (higher value for higher tpt)?
558 #define STA_LOST_PKT_THRESHOLD 50
559 #define STA_LOST_TDLS_PKT_THRESHOLD 10
560 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
562 static void ieee80211_lost_packet(struct sta_info
*sta
,
563 struct ieee80211_tx_info
*info
)
565 /* If driver relies on its own algorithm for station kickout, skip
566 * mac80211 packet loss mechanism.
568 if (ieee80211_hw_check(&sta
->local
->hw
, REPORTS_LOW_ACK
))
571 /* This packet was aggregated but doesn't carry status info */
572 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
573 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
576 sta
->status_stats
.lost_packets
++;
577 if (!sta
->sta
.tdls
&&
578 sta
->status_stats
.lost_packets
< STA_LOST_PKT_THRESHOLD
)
582 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
583 * of the last packets were lost, and that no ACK was received in the
584 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
588 (sta
->status_stats
.lost_packets
< STA_LOST_TDLS_PKT_THRESHOLD
||
590 sta
->status_stats
.last_tdls_pkt_time
+
591 STA_LOST_TDLS_PKT_TIME
)))
594 cfg80211_cqm_pktloss_notify(sta
->sdata
->dev
, sta
->sta
.addr
,
595 sta
->status_stats
.lost_packets
, GFP_ATOMIC
);
596 sta
->status_stats
.lost_packets
= 0;
599 static int ieee80211_tx_get_rates(struct ieee80211_hw
*hw
,
600 struct ieee80211_tx_info
*info
,
607 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
608 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
609 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
)) {
610 /* just the first aggr frame carry status info */
611 info
->status
.rates
[i
].idx
= -1;
612 info
->status
.rates
[i
].count
= 0;
614 } else if (info
->status
.rates
[i
].idx
< 0) {
616 } else if (i
>= hw
->max_report_rates
) {
617 /* the HW cannot have attempted that rate */
618 info
->status
.rates
[i
].idx
= -1;
619 info
->status
.rates
[i
].count
= 0;
623 count
+= info
->status
.rates
[i
].count
;
630 *retry_count
= count
;
634 void ieee80211_tx_status_noskb(struct ieee80211_hw
*hw
,
635 struct ieee80211_sta
*pubsta
,
636 struct ieee80211_tx_info
*info
)
638 struct ieee80211_local
*local
= hw_to_local(hw
);
639 struct ieee80211_supported_band
*sband
;
641 bool acked
, noack_success
;
643 ieee80211_tx_get_rates(hw
, info
, &retry_count
);
645 sband
= hw
->wiphy
->bands
[info
->band
];
647 acked
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
648 noack_success
= !!(info
->flags
& IEEE80211_TX_STAT_NOACK_TRANSMITTED
);
651 struct sta_info
*sta
;
653 sta
= container_of(pubsta
, struct sta_info
, sta
);
656 sta
->status_stats
.retry_failed
++;
657 sta
->status_stats
.retry_count
+= retry_count
;
660 sta
->status_stats
.last_ack
= jiffies
;
662 if (sta
->status_stats
.lost_packets
)
663 sta
->status_stats
.lost_packets
= 0;
665 /* Track when last TDLS packet was ACKed */
666 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER_AUTH
))
667 sta
->status_stats
.last_tdls_pkt_time
= jiffies
;
669 ieee80211_lost_packet(sta
, info
);
672 rate_control_tx_status_noskb(local
, sband
, sta
, info
);
675 if (acked
|| noack_success
) {
676 I802_DEBUG_INC(local
->dot11TransmittedFrameCount
);
678 I802_DEBUG_INC(local
->dot11MulticastTransmittedFrameCount
);
680 I802_DEBUG_INC(local
->dot11RetryCount
);
682 I802_DEBUG_INC(local
->dot11MultipleRetryCount
);
684 I802_DEBUG_INC(local
->dot11FailedCount
);
687 EXPORT_SYMBOL(ieee80211_tx_status_noskb
);
689 void ieee80211_tx_monitor(struct ieee80211_local
*local
, struct sk_buff
*skb
,
690 struct ieee80211_supported_band
*sband
,
691 int retry_count
, int shift
, bool send_to_cooked
)
693 struct sk_buff
*skb2
;
694 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
695 struct ieee80211_sub_if_data
*sdata
;
696 struct net_device
*prev_dev
= NULL
;
699 /* send frame to monitor interfaces now */
700 rtap_len
= ieee80211_tx_radiotap_len(info
);
701 if (WARN_ON_ONCE(skb_headroom(skb
) < rtap_len
)) {
702 pr_err("ieee80211_tx_status: headroom too small\n");
706 ieee80211_add_tx_radiotap_header(local
, sband
, skb
, retry_count
,
709 /* XXX: is this sufficient for BPF? */
710 skb_reset_mac_header(skb
);
711 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
712 skb
->pkt_type
= PACKET_OTHERHOST
;
713 skb
->protocol
= htons(ETH_P_802_2
);
714 memset(skb
->cb
, 0, sizeof(skb
->cb
));
717 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
718 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
719 if (!ieee80211_sdata_running(sdata
))
722 if ((sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
) &&
727 skb2
= skb_clone(skb
, GFP_ATOMIC
);
729 skb2
->dev
= prev_dev
;
734 prev_dev
= sdata
->dev
;
746 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
748 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
749 struct ieee80211_local
*local
= hw_to_local(hw
);
750 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
752 struct ieee80211_supported_band
*sband
;
753 struct rhlist_head
*tmp
;
754 struct sta_info
*sta
;
759 struct ieee80211_bar
*bar
;
761 int tid
= IEEE80211_NUM_TIDS
;
763 rates_idx
= ieee80211_tx_get_rates(hw
, info
, &retry_count
);
767 sband
= local
->hw
.wiphy
->bands
[info
->band
];
768 fc
= hdr
->frame_control
;
770 for_each_sta_info(local
, hdr
->addr1
, sta
, tmp
) {
771 /* skip wrong virtual interface */
772 if (!ether_addr_equal(hdr
->addr2
, sta
->sdata
->vif
.addr
))
775 shift
= ieee80211_vif_get_shift(&sta
->sdata
->vif
);
777 if (info
->flags
& IEEE80211_TX_STATUS_EOSP
)
778 clear_sta_flag(sta
, WLAN_STA_SP
);
780 acked
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
782 /* mesh Peer Service Period support */
783 if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
) &&
784 ieee80211_is_data_qos(fc
))
785 ieee80211_mpsp_trigger_process(
786 ieee80211_get_qos_ctl(hdr
), sta
, true, acked
);
788 if (!acked
&& test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
790 * The STA is in power save mode, so assume
791 * that this TX packet failed because of that.
793 ieee80211_handle_filtered_frame(local
, sta
, skb
);
798 if (ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
) &&
799 (ieee80211_is_data(hdr
->frame_control
)) &&
801 sta
->tx_stats
.last_rate
=
802 info
->status
.rates
[rates_idx
];
804 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
805 (ieee80211_is_data_qos(fc
))) {
809 qc
= ieee80211_get_qos_ctl(hdr
);
811 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
812 & IEEE80211_SCTL_SEQ
);
813 ieee80211_send_bar(&sta
->sdata
->vif
, hdr
->addr1
,
815 } else if (ieee80211_is_data_qos(fc
)) {
816 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
821 if (!acked
&& ieee80211_is_back_req(fc
)) {
825 * BAR failed, store the last SSN and retry sending
826 * the BAR when the next unicast transmission on the
829 bar
= (struct ieee80211_bar
*) skb
->data
;
830 control
= le16_to_cpu(bar
->control
);
831 if (!(control
& IEEE80211_BAR_CTRL_MULTI_TID
)) {
832 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
835 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
836 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
838 ieee80211_set_bar_pending(sta
, tid
, ssn
);
842 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
843 ieee80211_handle_filtered_frame(local
, sta
, skb
);
848 sta
->status_stats
.retry_failed
++;
849 sta
->status_stats
.retry_count
+= retry_count
;
851 if (ieee80211_is_data_present(fc
)) {
853 sta
->status_stats
.msdu_failed
[tid
]++;
855 sta
->status_stats
.msdu_retries
[tid
] +=
860 rate_control_tx_status(local
, sband
, sta
, skb
);
861 if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
862 ieee80211s_update_metric(local
, sta
, skb
);
864 if (!(info
->flags
& IEEE80211_TX_CTL_INJECTED
) && acked
)
865 ieee80211_frame_acked(sta
, skb
);
867 if ((sta
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
) &&
868 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
869 ieee80211_sta_tx_notify(sta
->sdata
, (void *) skb
->data
,
870 acked
, info
->status
.tx_time
);
872 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
873 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
874 if (sta
->status_stats
.lost_packets
)
875 sta
->status_stats
.lost_packets
= 0;
877 /* Track when last TDLS packet was ACKed */
878 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER_AUTH
))
879 sta
->status_stats
.last_tdls_pkt_time
=
882 ieee80211_lost_packet(sta
, info
);
889 ieee80211_led_tx(local
);
892 * Fragments are passed to low-level drivers as separate skbs, so these
893 * are actually fragments, not frames. Update frame counters only for
894 * the first fragment of the frame. */
895 if ((info
->flags
& IEEE80211_TX_STAT_ACK
) ||
896 (info
->flags
& IEEE80211_TX_STAT_NOACK_TRANSMITTED
)) {
897 if (ieee80211_is_first_frag(hdr
->seq_ctrl
)) {
898 I802_DEBUG_INC(local
->dot11TransmittedFrameCount
);
899 if (is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
900 I802_DEBUG_INC(local
->dot11MulticastTransmittedFrameCount
);
902 I802_DEBUG_INC(local
->dot11RetryCount
);
904 I802_DEBUG_INC(local
->dot11MultipleRetryCount
);
907 /* This counter shall be incremented for an acknowledged MPDU
908 * with an individual address in the address 1 field or an MPDU
909 * with a multicast address in the address 1 field of type Data
911 if (!is_multicast_ether_addr(hdr
->addr1
) ||
912 ieee80211_is_data(fc
) ||
913 ieee80211_is_mgmt(fc
))
914 I802_DEBUG_INC(local
->dot11TransmittedFragmentCount
);
916 if (ieee80211_is_first_frag(hdr
->seq_ctrl
))
917 I802_DEBUG_INC(local
->dot11FailedCount
);
920 if (ieee80211_is_nullfunc(fc
) && ieee80211_has_pm(fc
) &&
921 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
922 !(info
->flags
& IEEE80211_TX_CTL_INJECTED
) &&
923 local
->ps_sdata
&& !(local
->scanning
)) {
924 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
925 local
->ps_sdata
->u
.mgd
.flags
|=
926 IEEE80211_STA_NULLFUNC_ACKED
;
928 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
929 msecs_to_jiffies(10));
932 ieee80211_report_used_skb(local
, skb
, false);
934 /* this was a transmitted frame, but now we want to reuse it */
937 /* Need to make a copy before skb->cb gets cleared */
938 send_to_cooked
= !!(info
->flags
& IEEE80211_TX_CTL_INJECTED
) ||
939 !(ieee80211_is_data(fc
));
942 * This is a bit racy but we can avoid a lot of work
945 if (!local
->monitors
&& (!send_to_cooked
|| !local
->cooked_mntrs
)) {
950 /* send to monitor interfaces */
951 ieee80211_tx_monitor(local
, skb
, sband
, retry_count
, shift
, send_to_cooked
);
953 EXPORT_SYMBOL(ieee80211_tx_status
);
955 void ieee80211_report_low_ack(struct ieee80211_sta
*pubsta
, u32 num_packets
)
957 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
958 cfg80211_cqm_pktloss_notify(sta
->sdata
->dev
, sta
->sta
.addr
,
959 num_packets
, GFP_ATOMIC
);
961 EXPORT_SYMBOL(ieee80211_report_low_ack
);
963 void ieee80211_free_txskb(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
965 struct ieee80211_local
*local
= hw_to_local(hw
);
967 ieee80211_report_used_skb(local
, skb
, true);
968 dev_kfree_skb_any(skb
);
970 EXPORT_SYMBOL(ieee80211_free_txskb
);
972 void ieee80211_purge_tx_queue(struct ieee80211_hw
*hw
,
973 struct sk_buff_head
*skbs
)
977 while ((skb
= __skb_dequeue(skbs
)))
978 ieee80211_free_txskb(hw
, skb
);