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
;
55 * This skb 'survived' a round-trip through the driver, and
56 * hopefully the driver didn't mangle it too badly. However,
57 * we can definitely not rely on the control information
58 * being correct. Clear it so we don't get junk there, and
59 * indicate that it needs new processing, but must not be
60 * modified/encrypted again.
62 memset(&info
->control
, 0, sizeof(info
->control
));
64 info
->control
.jiffies
= jiffies
;
65 info
->control
.vif
= &sta
->sdata
->vif
;
66 info
->flags
|= IEEE80211_TX_INTFL_NEED_TXPROCESSING
|
67 IEEE80211_TX_INTFL_RETRANSMISSION
;
68 info
->flags
&= ~IEEE80211_TX_TEMPORARY_FLAGS
;
70 sta
->tx_filtered_count
++;
73 * Clear more-data bit on filtered frames, it might be set
74 * but later frames might time out so it might have to be
75 * clear again ... It's all rather unlikely (this frame
76 * should time out first, right?) but let's not confuse
77 * peers unnecessarily.
79 if (hdr
->frame_control
& cpu_to_le16(IEEE80211_FCTL_MOREDATA
))
80 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
82 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
83 u8
*p
= ieee80211_get_qos_ctl(hdr
);
84 int tid
= *p
& IEEE80211_QOS_CTL_TID_MASK
;
87 * Clear EOSP if set, this could happen e.g.
88 * if an absence period (us being a P2P GO)
91 if (*p
& IEEE80211_QOS_CTL_EOSP
)
92 *p
&= ~IEEE80211_QOS_CTL_EOSP
;
93 ac
= ieee802_1d_to_ac
[tid
& 7];
99 * Clear the TX filter mask for this STA when sending the next
100 * packet. If the STA went to power save mode, this will happen
101 * when it wakes up for the next time.
103 set_sta_flag(sta
, WLAN_STA_CLEAR_PS_FILT
);
106 * This code races in the following way:
108 * (1) STA sends frame indicating it will go to sleep and does so
109 * (2) hardware/firmware adds STA to filter list, passes frame up
110 * (3) hardware/firmware processes TX fifo and suppresses a frame
111 * (4) we get TX status before having processed the frame and
112 * knowing that the STA has gone to sleep.
114 * This is actually quite unlikely even when both those events are
115 * processed from interrupts coming in quickly after one another or
116 * even at the same time because we queue both TX status events and
117 * RX frames to be processed by a tasklet and process them in the
118 * same order that they were received or TX status last. Hence, there
119 * is no race as long as the frame RX is processed before the next TX
120 * status, which drivers can ensure, see below.
122 * Note that this can only happen if the hardware or firmware can
123 * actually add STAs to the filter list, if this is done by the
124 * driver in response to set_tim() (which will only reduce the race
125 * this whole filtering tries to solve, not completely solve it)
126 * this situation cannot happen.
128 * To completely solve this race drivers need to make sure that they
129 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
131 * (b) always process RX events before TX status events if ordering
132 * can be unknown, for example with different interrupt status
134 * (c) if PS mode transitions are manual (i.e. the flag
135 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
136 * changes before calling TX status events if ordering can be
139 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
140 skb_queue_len(&sta
->tx_filtered
[ac
]) < STA_MAX_TX_BUFFER
) {
141 skb_queue_tail(&sta
->tx_filtered
[ac
], skb
);
142 sta_info_recalc_tim(sta
);
144 if (!timer_pending(&local
->sta_cleanup
))
145 mod_timer(&local
->sta_cleanup
,
146 round_jiffies(jiffies
+
147 STA_INFO_CLEANUP_INTERVAL
));
151 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
) &&
152 !(info
->flags
& IEEE80211_TX_INTFL_RETRIED
)) {
153 /* Software retry the packet once */
154 info
->flags
|= IEEE80211_TX_INTFL_RETRIED
;
155 ieee80211_add_pending_skb(local
, skb
);
159 ps_dbg_ratelimited(sta
->sdata
,
160 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
161 skb_queue_len(&sta
->tx_filtered
[ac
]),
162 !!test_sta_flag(sta
, WLAN_STA_PS_STA
), jiffies
);
163 ieee80211_free_txskb(&local
->hw
, skb
);
166 static void ieee80211_check_pending_bar(struct sta_info
*sta
, u8
*addr
, u8 tid
)
168 struct tid_ampdu_tx
*tid_tx
;
170 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
171 if (!tid_tx
|| !tid_tx
->bar_pending
)
174 tid_tx
->bar_pending
= false;
175 ieee80211_send_bar(&sta
->sdata
->vif
, addr
, tid
, tid_tx
->failed_bar_ssn
);
178 static void ieee80211_frame_acked(struct sta_info
*sta
, struct sk_buff
*skb
)
180 struct ieee80211_mgmt
*mgmt
= (void *) skb
->data
;
181 struct ieee80211_local
*local
= sta
->local
;
182 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
184 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
185 sta
->last_rx
= jiffies
;
187 if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
188 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
189 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
190 u16 tid
= qc
[0] & 0xf;
192 ieee80211_check_pending_bar(sta
, hdr
->addr1
, tid
);
195 if (ieee80211_is_action(mgmt
->frame_control
) &&
196 mgmt
->u
.action
.category
== WLAN_CATEGORY_HT
&&
197 mgmt
->u
.action
.u
.ht_smps
.action
== WLAN_HT_ACTION_SMPS
&&
198 ieee80211_sdata_running(sdata
)) {
199 enum ieee80211_smps_mode smps_mode
;
201 switch (mgmt
->u
.action
.u
.ht_smps
.smps_control
) {
202 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
203 smps_mode
= IEEE80211_SMPS_DYNAMIC
;
205 case WLAN_HT_SMPS_CONTROL_STATIC
:
206 smps_mode
= IEEE80211_SMPS_STATIC
;
208 case WLAN_HT_SMPS_CONTROL_DISABLED
:
209 default: /* shouldn't happen since we don't send that */
210 smps_mode
= IEEE80211_SMPS_OFF
;
214 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
216 * This update looks racy, but isn't -- if we come
217 * here we've definitely got a station that we're
218 * talking to, and on a managed interface that can
219 * only be the AP. And the only other place updating
220 * this variable in managed mode is before association.
222 sdata
->smps_mode
= smps_mode
;
223 ieee80211_queue_work(&local
->hw
, &sdata
->recalc_smps
);
224 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
225 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
226 sta
->known_smps_mode
= smps_mode
;
231 static void ieee80211_set_bar_pending(struct sta_info
*sta
, u8 tid
, u16 ssn
)
233 struct tid_ampdu_tx
*tid_tx
;
235 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
239 tid_tx
->failed_bar_ssn
= ssn
;
240 tid_tx
->bar_pending
= true;
243 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info
*info
)
245 int len
= sizeof(struct ieee80211_radiotap_header
);
247 /* IEEE80211_RADIOTAP_RATE rate */
248 if (info
->status
.rates
[0].idx
>= 0 &&
249 !(info
->status
.rates
[0].flags
& (IEEE80211_TX_RC_MCS
|
250 IEEE80211_TX_RC_VHT_MCS
)))
253 /* IEEE80211_RADIOTAP_TX_FLAGS */
256 /* IEEE80211_RADIOTAP_DATA_RETRIES */
259 /* IEEE80211_RADIOTAP_MCS
260 * IEEE80211_RADIOTAP_VHT */
261 if (info
->status
.rates
[0].idx
>= 0) {
262 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
)
264 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_VHT_MCS
)
265 len
= ALIGN(len
, 2) + 12;
272 ieee80211_add_tx_radiotap_header(struct ieee80211_local
*local
,
273 struct ieee80211_supported_band
*sband
,
274 struct sk_buff
*skb
, int retry_count
,
275 int rtap_len
, int shift
)
277 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
278 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
279 struct ieee80211_radiotap_header
*rthdr
;
283 rthdr
= (struct ieee80211_radiotap_header
*) skb_push(skb
, rtap_len
);
285 memset(rthdr
, 0, rtap_len
);
286 rthdr
->it_len
= cpu_to_le16(rtap_len
);
288 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
289 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
290 pos
= (unsigned char *)(rthdr
+ 1);
293 * XXX: Once radiotap gets the bitmap reset thing the vendor
294 * extensions proposal contains, we can actually report
295 * the whole set of tries we did.
298 /* IEEE80211_RADIOTAP_RATE */
299 if (info
->status
.rates
[0].idx
>= 0 &&
300 !(info
->status
.rates
[0].flags
& (IEEE80211_TX_RC_MCS
|
301 IEEE80211_TX_RC_VHT_MCS
))) {
304 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE
);
305 rate
= sband
->bitrates
[info
->status
.rates
[0].idx
].bitrate
;
306 *pos
= DIV_ROUND_UP(rate
, 5 * (1 << shift
));
307 /* padding for tx flags */
311 /* IEEE80211_RADIOTAP_TX_FLAGS */
313 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
314 !is_multicast_ether_addr(hdr
->addr1
))
315 txflags
|= IEEE80211_RADIOTAP_F_TX_FAIL
;
317 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
)
318 txflags
|= IEEE80211_RADIOTAP_F_TX_CTS
;
319 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)
320 txflags
|= IEEE80211_RADIOTAP_F_TX_RTS
;
322 put_unaligned_le16(txflags
, pos
);
325 /* IEEE80211_RADIOTAP_DATA_RETRIES */
326 /* for now report the total retry_count */
330 if (info
->status
.rates
[0].idx
< 0)
333 /* IEEE80211_RADIOTAP_MCS
334 * IEEE80211_RADIOTAP_VHT */
335 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_MCS
) {
336 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS
);
337 pos
[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS
|
338 IEEE80211_RADIOTAP_MCS_HAVE_GI
|
339 IEEE80211_RADIOTAP_MCS_HAVE_BW
;
340 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_SHORT_GI
)
341 pos
[1] |= IEEE80211_RADIOTAP_MCS_SGI
;
342 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
343 pos
[1] |= IEEE80211_RADIOTAP_MCS_BW_40
;
344 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_GREEN_FIELD
)
345 pos
[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF
;
346 pos
[2] = info
->status
.rates
[0].idx
;
348 } else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_VHT_MCS
) {
349 u16 known
= local
->hw
.radiotap_vht_details
&
350 (IEEE80211_RADIOTAP_VHT_KNOWN_GI
|
351 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH
);
353 rthdr
->it_present
|= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT
);
355 /* required alignment from rthdr */
356 pos
= (u8
*)rthdr
+ ALIGN(pos
- (u8
*)rthdr
, 2);
358 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
359 put_unaligned_le16(known
, pos
);
362 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
363 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_SHORT_GI
)
364 *pos
|= IEEE80211_RADIOTAP_VHT_FLAG_SGI
;
368 if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
370 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_80_MHZ_WIDTH
)
372 else if (info
->status
.rates
[0].flags
& IEEE80211_TX_RC_160_MHZ_WIDTH
)
374 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
379 *pos
= (ieee80211_rate_get_vht_mcs(&info
->status
.rates
[0]) << 4) |
380 ieee80211_rate_get_vht_nss(&info
->status
.rates
[0]);
387 /* u16 partial_aid */
393 * Handles the tx for TDLS teardown frames.
394 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
396 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local
*local
,
397 struct ieee80211_sub_if_data
*sdata
,
398 struct sk_buff
*skb
, u32 flags
)
400 struct sk_buff
*teardown_skb
;
401 struct sk_buff
*orig_teardown_skb
;
402 bool is_teardown
= false;
404 /* Get the teardown data we need and free the lock */
405 spin_lock(&sdata
->u
.mgd
.teardown_lock
);
406 teardown_skb
= sdata
->u
.mgd
.teardown_skb
;
407 orig_teardown_skb
= sdata
->u
.mgd
.orig_teardown_skb
;
408 if ((skb
== orig_teardown_skb
) && teardown_skb
) {
409 sdata
->u
.mgd
.teardown_skb
= NULL
;
410 sdata
->u
.mgd
.orig_teardown_skb
= NULL
;
413 spin_unlock(&sdata
->u
.mgd
.teardown_lock
);
416 /* This mechanism relies on being able to get ACKs */
417 WARN_ON(!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
));
419 /* Check if peer has ACKed */
420 if (flags
& IEEE80211_TX_STAT_ACK
) {
421 dev_kfree_skb_any(teardown_skb
);
424 "TDLS Resending teardown through AP\n");
426 ieee80211_subif_start_xmit(teardown_skb
, skb
->dev
);
431 static struct ieee80211_sub_if_data
*
432 ieee80211_sdata_from_skb(struct ieee80211_local
*local
, struct sk_buff
*skb
)
434 struct ieee80211_sub_if_data
*sdata
;
437 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
441 if (skb
->dev
== sdata
->dev
)
448 return rcu_dereference(local
->p2p_sdata
);
451 static void ieee80211_report_ack_skb(struct ieee80211_local
*local
,
452 struct ieee80211_tx_info
*info
,
453 bool acked
, bool dropped
)
458 spin_lock_irqsave(&local
->ack_status_lock
, flags
);
459 skb
= idr_find(&local
->ack_status_frames
, info
->ack_frame_id
);
461 idr_remove(&local
->ack_status_frames
, info
->ack_frame_id
);
462 spin_unlock_irqrestore(&local
->ack_status_lock
, flags
);
468 dev_kfree_skb_any(skb
);
472 if (info
->flags
& IEEE80211_TX_INTFL_NL80211_FRAME_TX
) {
473 u64 cookie
= IEEE80211_SKB_CB(skb
)->ack
.cookie
;
474 struct ieee80211_sub_if_data
*sdata
;
475 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
478 sdata
= ieee80211_sdata_from_skb(local
, skb
);
480 if (ieee80211_is_nullfunc(hdr
->frame_control
) ||
481 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
482 cfg80211_probe_status(sdata
->dev
, hdr
->addr1
,
486 cfg80211_mgmt_tx_status(&sdata
->wdev
, cookie
,
492 dev_kfree_skb_any(skb
);
495 skb_complete_wifi_ack(skb
, acked
);
499 static void ieee80211_report_used_skb(struct ieee80211_local
*local
,
500 struct sk_buff
*skb
, bool dropped
)
502 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
503 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
504 bool acked
= info
->flags
& IEEE80211_TX_STAT_ACK
;
509 if (info
->flags
& IEEE80211_TX_INTFL_MLME_CONN_TX
) {
510 struct ieee80211_sub_if_data
*sdata
;
514 sdata
= ieee80211_sdata_from_skb(local
, skb
);
519 unsigned int hdr_size
=
520 ieee80211_hdrlen(hdr
->frame_control
);
522 /* Check to see if packet is a TDLS teardown packet */
523 if (ieee80211_is_data(hdr
->frame_control
) &&
524 (ieee80211_get_tdls_action(skb
, hdr_size
) ==
526 ieee80211_tdls_td_tx_handle(local
, sdata
, skb
,
529 ieee80211_mgd_conn_tx_status(sdata
,
535 } else if (info
->ack_frame_id
) {
536 ieee80211_report_ack_skb(local
, info
, acked
, dropped
);
541 * Use a static threshold for now, best value to be determined
543 * Should it depend on:
544 * - on # of retransmissions
545 * - current throughput (higher value for higher tpt)?
547 #define STA_LOST_PKT_THRESHOLD 50
548 #define STA_LOST_TDLS_PKT_THRESHOLD 10
549 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
551 static void ieee80211_lost_packet(struct sta_info
*sta
,
552 struct ieee80211_tx_info
*info
)
554 /* This packet was aggregated but doesn't carry status info */
555 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
556 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
))
560 if (!sta
->sta
.tdls
&& sta
->lost_packets
< STA_LOST_PKT_THRESHOLD
)
564 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
565 * of the last packets were lost, and that no ACK was received in the
566 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
570 (sta
->lost_packets
< STA_LOST_TDLS_PKT_THRESHOLD
||
572 sta
->last_tdls_pkt_time
+ STA_LOST_TDLS_PKT_TIME
)))
575 cfg80211_cqm_pktloss_notify(sta
->sdata
->dev
, sta
->sta
.addr
,
576 sta
->lost_packets
, GFP_ATOMIC
);
577 sta
->lost_packets
= 0;
580 static int ieee80211_tx_get_rates(struct ieee80211_hw
*hw
,
581 struct ieee80211_tx_info
*info
,
588 for (i
= 0; i
< IEEE80211_TX_MAX_RATES
; i
++) {
589 if ((info
->flags
& IEEE80211_TX_CTL_AMPDU
) &&
590 !(info
->flags
& IEEE80211_TX_STAT_AMPDU
)) {
591 /* just the first aggr frame carry status info */
592 info
->status
.rates
[i
].idx
= -1;
593 info
->status
.rates
[i
].count
= 0;
595 } else if (info
->status
.rates
[i
].idx
< 0) {
597 } else if (i
>= hw
->max_report_rates
) {
598 /* the HW cannot have attempted that rate */
599 info
->status
.rates
[i
].idx
= -1;
600 info
->status
.rates
[i
].count
= 0;
604 count
+= info
->status
.rates
[i
].count
;
611 *retry_count
= count
;
615 void ieee80211_tx_status_noskb(struct ieee80211_hw
*hw
,
616 struct ieee80211_sta
*pubsta
,
617 struct ieee80211_tx_info
*info
)
619 struct ieee80211_local
*local
= hw_to_local(hw
);
620 struct ieee80211_supported_band
*sband
;
623 bool acked
, noack_success
;
625 rates_idx
= ieee80211_tx_get_rates(hw
, info
, &retry_count
);
627 sband
= hw
->wiphy
->bands
[info
->band
];
629 acked
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
630 noack_success
= !!(info
->flags
& IEEE80211_TX_STAT_NOACK_TRANSMITTED
);
633 struct sta_info
*sta
;
635 sta
= container_of(pubsta
, struct sta_info
, sta
);
638 sta
->tx_retry_failed
++;
639 sta
->tx_retry_count
+= retry_count
;
642 sta
->last_rx
= jiffies
;
644 if (sta
->lost_packets
)
645 sta
->lost_packets
= 0;
647 /* Track when last TDLS packet was ACKed */
648 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER_AUTH
))
649 sta
->last_tdls_pkt_time
= jiffies
;
651 ieee80211_lost_packet(sta
, info
);
654 rate_control_tx_status_noskb(local
, sband
, sta
, info
);
657 if (acked
|| noack_success
) {
658 I802_DEBUG_INC(local
->dot11TransmittedFrameCount
);
660 I802_DEBUG_INC(local
->dot11MulticastTransmittedFrameCount
);
662 I802_DEBUG_INC(local
->dot11RetryCount
);
664 I802_DEBUG_INC(local
->dot11MultipleRetryCount
);
666 I802_DEBUG_INC(local
->dot11FailedCount
);
669 EXPORT_SYMBOL(ieee80211_tx_status_noskb
);
671 void ieee80211_tx_monitor(struct ieee80211_local
*local
, struct sk_buff
*skb
,
672 struct ieee80211_supported_band
*sband
,
673 int retry_count
, int shift
, bool send_to_cooked
)
675 struct sk_buff
*skb2
;
676 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
677 struct ieee80211_sub_if_data
*sdata
;
678 struct net_device
*prev_dev
= NULL
;
681 /* send frame to monitor interfaces now */
682 rtap_len
= ieee80211_tx_radiotap_len(info
);
683 if (WARN_ON_ONCE(skb_headroom(skb
) < rtap_len
)) {
684 pr_err("ieee80211_tx_status: headroom too small\n");
688 ieee80211_add_tx_radiotap_header(local
, sband
, skb
, retry_count
,
691 /* XXX: is this sufficient for BPF? */
692 skb_set_mac_header(skb
, 0);
693 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
694 skb
->pkt_type
= PACKET_OTHERHOST
;
695 skb
->protocol
= htons(ETH_P_802_2
);
696 memset(skb
->cb
, 0, sizeof(skb
->cb
));
699 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
700 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
) {
701 if (!ieee80211_sdata_running(sdata
))
704 if ((sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) &&
709 skb2
= skb_clone(skb
, GFP_ATOMIC
);
711 skb2
->dev
= prev_dev
;
716 prev_dev
= sdata
->dev
;
728 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
730 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
731 struct ieee80211_local
*local
= hw_to_local(hw
);
732 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
734 struct ieee80211_supported_band
*sband
;
735 struct sta_info
*sta
;
736 struct rhash_head
*tmp
;
741 struct ieee80211_bar
*bar
;
743 int tid
= IEEE80211_NUM_TIDS
;
744 const struct bucket_table
*tbl
;
746 rates_idx
= ieee80211_tx_get_rates(hw
, info
, &retry_count
);
750 sband
= local
->hw
.wiphy
->bands
[info
->band
];
751 fc
= hdr
->frame_control
;
753 tbl
= rht_dereference_rcu(local
->sta_hash
.tbl
, &local
->sta_hash
);
755 for_each_sta_info(local
, tbl
, hdr
->addr1
, sta
, tmp
) {
756 /* skip wrong virtual interface */
757 if (!ether_addr_equal(hdr
->addr2
, sta
->sdata
->vif
.addr
))
760 shift
= ieee80211_vif_get_shift(&sta
->sdata
->vif
);
762 if (info
->flags
& IEEE80211_TX_STATUS_EOSP
)
763 clear_sta_flag(sta
, WLAN_STA_SP
);
765 acked
= !!(info
->flags
& IEEE80211_TX_STAT_ACK
);
766 if (!acked
&& test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
768 * The STA is in power save mode, so assume
769 * that this TX packet failed because of that.
771 ieee80211_handle_filtered_frame(local
, sta
, skb
);
776 /* mesh Peer Service Period support */
777 if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
) &&
778 ieee80211_is_data_qos(fc
))
779 ieee80211_mpsp_trigger_process(
780 ieee80211_get_qos_ctl(hdr
),
783 if (ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
) &&
784 (ieee80211_is_data(hdr
->frame_control
)) &&
786 sta
->last_tx_rate
= info
->status
.rates
[rates_idx
];
788 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
789 (ieee80211_is_data_qos(fc
))) {
793 qc
= ieee80211_get_qos_ctl(hdr
);
795 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
796 & IEEE80211_SCTL_SEQ
);
797 ieee80211_send_bar(&sta
->sdata
->vif
, hdr
->addr1
,
799 } else if (ieee80211_is_data_qos(fc
)) {
800 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
805 if (!acked
&& ieee80211_is_back_req(fc
)) {
809 * BAR failed, store the last SSN and retry sending
810 * the BAR when the next unicast transmission on the
813 bar
= (struct ieee80211_bar
*) skb
->data
;
814 control
= le16_to_cpu(bar
->control
);
815 if (!(control
& IEEE80211_BAR_CTRL_MULTI_TID
)) {
816 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
819 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
820 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
822 ieee80211_set_bar_pending(sta
, tid
, ssn
);
826 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
827 ieee80211_handle_filtered_frame(local
, sta
, skb
);
832 sta
->tx_retry_failed
++;
833 sta
->tx_retry_count
+= retry_count
;
835 if (ieee80211_is_data_present(fc
)) {
837 sta
->tx_msdu_failed
[tid
]++;
838 sta
->tx_msdu_retries
[tid
] += retry_count
;
842 rate_control_tx_status(local
, sband
, sta
, skb
);
843 if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
844 ieee80211s_update_metric(local
, sta
, skb
);
846 if (!(info
->flags
& IEEE80211_TX_CTL_INJECTED
) && acked
)
847 ieee80211_frame_acked(sta
, skb
);
849 if ((sta
->sdata
->vif
.type
== NL80211_IFTYPE_STATION
) &&
850 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
851 ieee80211_sta_tx_notify(sta
->sdata
, (void *) skb
->data
,
852 acked
, info
->status
.tx_time
);
854 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
855 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
856 if (sta
->lost_packets
)
857 sta
->lost_packets
= 0;
859 /* Track when last TDLS packet was ACKed */
860 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER_AUTH
))
861 sta
->last_tdls_pkt_time
= jiffies
;
863 ieee80211_lost_packet(sta
, info
);
868 sta
->last_ack_signal
= info
->status
.ack_signal
;
873 ieee80211_led_tx(local
);
876 * Fragments are passed to low-level drivers as separate skbs, so these
877 * are actually fragments, not frames. Update frame counters only for
878 * the first fragment of the frame. */
879 if ((info
->flags
& IEEE80211_TX_STAT_ACK
) ||
880 (info
->flags
& IEEE80211_TX_STAT_NOACK_TRANSMITTED
)) {
881 if (ieee80211_is_first_frag(hdr
->seq_ctrl
)) {
882 I802_DEBUG_INC(local
->dot11TransmittedFrameCount
);
883 if (is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
884 I802_DEBUG_INC(local
->dot11MulticastTransmittedFrameCount
);
886 I802_DEBUG_INC(local
->dot11RetryCount
);
888 I802_DEBUG_INC(local
->dot11MultipleRetryCount
);
891 /* This counter shall be incremented for an acknowledged MPDU
892 * with an individual address in the address 1 field or an MPDU
893 * with a multicast address in the address 1 field of type Data
895 if (!is_multicast_ether_addr(hdr
->addr1
) ||
896 ieee80211_is_data(fc
) ||
897 ieee80211_is_mgmt(fc
))
898 I802_DEBUG_INC(local
->dot11TransmittedFragmentCount
);
900 if (ieee80211_is_first_frag(hdr
->seq_ctrl
))
901 I802_DEBUG_INC(local
->dot11FailedCount
);
904 if (ieee80211_is_nullfunc(fc
) && ieee80211_has_pm(fc
) &&
905 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
906 !(info
->flags
& IEEE80211_TX_CTL_INJECTED
) &&
907 local
->ps_sdata
&& !(local
->scanning
)) {
908 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
909 local
->ps_sdata
->u
.mgd
.flags
|=
910 IEEE80211_STA_NULLFUNC_ACKED
;
912 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
913 msecs_to_jiffies(10));
916 ieee80211_report_used_skb(local
, skb
, false);
918 /* this was a transmitted frame, but now we want to reuse it */
921 /* Need to make a copy before skb->cb gets cleared */
922 send_to_cooked
= !!(info
->flags
& IEEE80211_TX_CTL_INJECTED
) ||
923 !(ieee80211_is_data(fc
));
926 * This is a bit racy but we can avoid a lot of work
929 if (!local
->monitors
&& (!send_to_cooked
|| !local
->cooked_mntrs
)) {
934 /* send to monitor interfaces */
935 ieee80211_tx_monitor(local
, skb
, sband
, retry_count
, shift
, send_to_cooked
);
937 EXPORT_SYMBOL(ieee80211_tx_status
);
939 void ieee80211_report_low_ack(struct ieee80211_sta
*pubsta
, u32 num_packets
)
941 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
942 cfg80211_cqm_pktloss_notify(sta
->sdata
->dev
, sta
->sta
.addr
,
943 num_packets
, GFP_ATOMIC
);
945 EXPORT_SYMBOL(ieee80211_report_low_ack
);
947 void ieee80211_free_txskb(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
949 struct ieee80211_local
*local
= hw_to_local(hw
);
951 ieee80211_report_used_skb(local
, skb
, true);
952 dev_kfree_skb_any(skb
);
954 EXPORT_SYMBOL(ieee80211_free_txskb
);
956 void ieee80211_purge_tx_queue(struct ieee80211_hw
*hw
,
957 struct sk_buff_head
*skbs
)
961 while ((skb
= __skb_dequeue(skbs
)))
962 ieee80211_free_txskb(hw
, skb
);