1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 #include <linux/export.h>
11 #include <linux/etherdevice.h>
12 #include <net/mac80211.h>
13 #include <asm/unaligned.h>
14 #include "ieee80211_i.h"
21 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
24 struct ieee80211_local *local = hw_to_local(hw);
25 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
28 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
29 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
30 &local->skb_queue : &local->skb_queue_unreliable, skb);
31 tmp = skb_queue_len(&local->skb_queue) +
32 skb_queue_len(&local->skb_queue_unreliable);
33 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
34 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
35 ieee80211_free_txskb(hw, skb);
37 I802_DEBUG_INC(local->tx_status_drop);
39 tasklet_schedule(&local->tasklet);
41 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
43 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
47 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
48 struct ieee80211_hdr *hdr = (void *)skb->data;
51 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
52 IEEE80211_TX_CTL_AMPDU)) {
53 ieee80211_free_txskb(&local->hw, skb);
58 * This skb 'survived' a round-trip through the driver, and
59 * hopefully the driver didn't mangle it too badly. However,
60 * we can definitely not rely on the control information
61 * being correct. Clear it so we don't get junk there, and
62 * indicate that it needs new processing, but must not be
63 * modified/encrypted again.
65 memset(&info->control, 0, sizeof(info->control));
67 info->control.jiffies = jiffies;
68 info->control.vif = &sta->sdata->vif;
69 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
70 IEEE80211_TX_INTFL_RETRANSMISSION;
71 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
73 sta->status_stats.filtered++;
76 * Clear more-data bit on filtered frames, it might be set
77 * but later frames might time out so it might have to be
78 * clear again ... It's all rather unlikely (this frame
79 * should time out first, right?) but let's not confuse
80 * peers unnecessarily.
82 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
83 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
85 if (ieee80211_is_data_qos(hdr->frame_control)) {
86 u8 *p = ieee80211_get_qos_ctl(hdr);
87 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
90 * Clear EOSP if set, this could happen e.g.
91 * if an absence period (us being a P2P GO)
94 if (*p & IEEE80211_QOS_CTL_EOSP)
95 *p &= ~IEEE80211_QOS_CTL_EOSP;
96 ac = ieee80211_ac_from_tid(tid);
102 * Clear the TX filter mask for this STA when sending the next
103 * packet. If the STA went to power save mode, this will happen
104 * when it wakes up for the next time.
106 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
107 ieee80211_clear_fast_xmit(sta);
110 * This code races in the following way:
112 * (1) STA sends frame indicating it will go to sleep and does so
113 * (2) hardware/firmware adds STA to filter list, passes frame up
114 * (3) hardware/firmware processes TX fifo and suppresses a frame
115 * (4) we get TX status before having processed the frame and
116 * knowing that the STA has gone to sleep.
118 * This is actually quite unlikely even when both those events are
119 * processed from interrupts coming in quickly after one another or
120 * even at the same time because we queue both TX status events and
121 * RX frames to be processed by a tasklet and process them in the
122 * same order that they were received or TX status last. Hence, there
123 * is no race as long as the frame RX is processed before the next TX
124 * status, which drivers can ensure, see below.
126 * Note that this can only happen if the hardware or firmware can
127 * actually add STAs to the filter list, if this is done by the
128 * driver in response to set_tim() (which will only reduce the race
129 * this whole filtering tries to solve, not completely solve it)
130 * this situation cannot happen.
132 * To completely solve this race drivers need to make sure that they
133 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
135 * (b) always process RX events before TX status events if ordering
136 * can be unknown, for example with different interrupt status
138 * (c) if PS mode transitions are manual (i.e. the flag
139 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
140 * changes before calling TX status events if ordering can be
143 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
144 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
145 skb_queue_tail(&sta->tx_filtered[ac], skb);
146 sta_info_recalc_tim(sta);
148 if (!timer_pending(&local->sta_cleanup))
149 mod_timer(&local->sta_cleanup,
150 round_jiffies(jiffies +
151 STA_INFO_CLEANUP_INTERVAL));
155 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
156 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
157 /* Software retry the packet once */
158 info->flags |= IEEE80211_TX_INTFL_RETRIED;
159 ieee80211_add_pending_skb(local, skb);
163 ps_dbg_ratelimited(sta->sdata,
164 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
165 skb_queue_len(&sta->tx_filtered[ac]),
166 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
167 ieee80211_free_txskb(&local->hw, skb);
170 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
172 struct tid_ampdu_tx *tid_tx;
174 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
175 if (!tid_tx || !tid_tx->bar_pending)
178 tid_tx->bar_pending = false;
179 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
182 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
184 struct ieee80211_mgmt *mgmt = (void *) skb->data;
185 struct ieee80211_local *local = sta->local;
186 struct ieee80211_sub_if_data *sdata = sta->sdata;
187 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
189 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
190 sta->status_stats.last_ack = jiffies;
191 if (txinfo->status.is_valid_ack_signal) {
192 sta->status_stats.last_ack_signal =
193 (s8)txinfo->status.ack_signal;
194 sta->status_stats.ack_signal_filled = true;
195 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
196 -txinfo->status.ack_signal);
200 if (ieee80211_is_data_qos(mgmt->frame_control)) {
201 struct ieee80211_hdr *hdr = (void *) skb->data;
202 u8 *qc = ieee80211_get_qos_ctl(hdr);
203 u16 tid = qc[0] & 0xf;
205 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
208 if (ieee80211_is_action(mgmt->frame_control) &&
209 !ieee80211_has_protected(mgmt->frame_control) &&
210 mgmt->u.action.category == WLAN_CATEGORY_HT &&
211 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
212 ieee80211_sdata_running(sdata)) {
213 enum ieee80211_smps_mode smps_mode;
215 switch (mgmt->u.action.u.ht_smps.smps_control) {
216 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
217 smps_mode = IEEE80211_SMPS_DYNAMIC;
219 case WLAN_HT_SMPS_CONTROL_STATIC:
220 smps_mode = IEEE80211_SMPS_STATIC;
222 case WLAN_HT_SMPS_CONTROL_DISABLED:
223 default: /* shouldn't happen since we don't send that */
224 smps_mode = IEEE80211_SMPS_OFF;
228 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
230 * This update looks racy, but isn't -- if we come
231 * here we've definitely got a station that we're
232 * talking to, and on a managed interface that can
233 * only be the AP. And the only other place updating
234 * this variable in managed mode is before association.
236 sdata->smps_mode = smps_mode;
237 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
238 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
239 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
240 sta->known_smps_mode = smps_mode;
245 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
247 struct tid_ampdu_tx *tid_tx;
249 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
253 tid_tx->failed_bar_ssn = ssn;
254 tid_tx->bar_pending = true;
257 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
258 struct ieee80211_tx_status *status)
260 int len = sizeof(struct ieee80211_radiotap_header);
262 /* IEEE80211_RADIOTAP_RATE rate */
263 if (status && status->rate && !(status->rate->flags &
264 (RATE_INFO_FLAGS_MCS |
265 RATE_INFO_FLAGS_DMG |
266 RATE_INFO_FLAGS_EDMG |
267 RATE_INFO_FLAGS_VHT_MCS |
268 RATE_INFO_FLAGS_HE_MCS)))
270 else if (info->status.rates[0].idx >= 0 &&
271 !(info->status.rates[0].flags &
272 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
275 /* IEEE80211_RADIOTAP_TX_FLAGS */
278 /* IEEE80211_RADIOTAP_DATA_RETRIES */
281 /* IEEE80211_RADIOTAP_MCS
282 * IEEE80211_RADIOTAP_VHT */
283 if (status && status->rate) {
284 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
286 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
287 len = ALIGN(len, 2) + 12;
288 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
289 len = ALIGN(len, 2) + 12;
290 } else if (info->status.rates[0].idx >= 0) {
291 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
293 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
294 len = ALIGN(len, 2) + 12;
301 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
302 struct ieee80211_supported_band *sband,
303 struct sk_buff *skb, int retry_count,
304 int rtap_len, int shift,
305 struct ieee80211_tx_status *status)
307 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
308 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
309 struct ieee80211_radiotap_header *rthdr;
314 rthdr = skb_push(skb, rtap_len);
316 memset(rthdr, 0, rtap_len);
317 rthdr->it_len = cpu_to_le16(rtap_len);
319 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
320 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
321 pos = (unsigned char *)(rthdr + 1);
324 * XXX: Once radiotap gets the bitmap reset thing the vendor
325 * extensions proposal contains, we can actually report
326 * the whole set of tries we did.
329 /* IEEE80211_RADIOTAP_RATE */
331 if (status && status->rate) {
332 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
333 RATE_INFO_FLAGS_DMG |
334 RATE_INFO_FLAGS_EDMG |
335 RATE_INFO_FLAGS_VHT_MCS |
336 RATE_INFO_FLAGS_HE_MCS)))
337 legacy_rate = status->rate->legacy;
338 } else if (info->status.rates[0].idx >= 0 &&
339 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
340 IEEE80211_TX_RC_VHT_MCS)))
342 sband->bitrates[info->status.rates[0].idx].bitrate;
345 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
346 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
347 /* padding for tx flags */
351 /* IEEE80211_RADIOTAP_TX_FLAGS */
353 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
354 !is_multicast_ether_addr(hdr->addr1))
355 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
357 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
358 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
359 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
360 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
362 put_unaligned_le16(txflags, pos);
365 /* IEEE80211_RADIOTAP_DATA_RETRIES */
366 /* for now report the total retry_count */
370 if (status && status->rate &&
371 (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
372 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
373 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
374 IEEE80211_RADIOTAP_MCS_HAVE_GI |
375 IEEE80211_RADIOTAP_MCS_HAVE_BW;
376 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
377 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
378 if (status->rate->bw == RATE_INFO_BW_40)
379 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
380 pos[2] = status->rate->mcs;
382 } else if (status && status->rate &&
383 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
384 u16 known = local->hw.radiotap_vht_details &
385 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
386 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
388 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
390 /* required alignment from rthdr */
391 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
393 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
394 put_unaligned_le16(known, pos);
397 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
398 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
403 switch (status->rate->bw) {
404 case RATE_INFO_BW_160:
407 case RATE_INFO_BW_80:
410 case RATE_INFO_BW_40:
420 *pos = (status->rate->mcs << 4) | status->rate->nss;
427 /* u16 partial_aid */
429 } else if (status && status->rate &&
430 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
431 struct ieee80211_radiotap_he *he;
433 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
435 /* required alignment from rthdr */
436 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
437 he = (struct ieee80211_radiotap_he *)pos;
439 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
440 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
441 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
442 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
444 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
446 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
448 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
450 #define CHECK_GI(s) \
451 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
452 (int)NL80211_RATE_INFO_HE_GI_##s)
458 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
459 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
461 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
463 switch (status->rate->bw) {
464 case RATE_INFO_BW_20:
465 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
466 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
468 case RATE_INFO_BW_40:
469 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
470 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
472 case RATE_INFO_BW_80:
473 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
474 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
476 case RATE_INFO_BW_160:
477 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
478 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
480 case RATE_INFO_BW_HE_RU:
481 #define CHECK_RU_ALLOC(s) \
482 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
483 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
491 CHECK_RU_ALLOC(2x996);
493 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
494 status->rate->he_ru_alloc + 4);
497 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
500 pos += sizeof(struct ieee80211_radiotap_he);
503 if ((status && status->rate) || info->status.rates[0].idx < 0)
506 /* IEEE80211_RADIOTAP_MCS
507 * IEEE80211_RADIOTAP_VHT */
508 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
509 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
510 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
511 IEEE80211_RADIOTAP_MCS_HAVE_GI |
512 IEEE80211_RADIOTAP_MCS_HAVE_BW;
513 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
514 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
515 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
516 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
517 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
518 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
519 pos[2] = info->status.rates[0].idx;
521 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
522 u16 known = local->hw.radiotap_vht_details &
523 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
524 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
526 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
528 /* required alignment from rthdr */
529 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
531 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
532 put_unaligned_le16(known, pos);
535 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
536 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
537 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
541 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
543 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
547 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
552 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
553 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
560 /* u16 partial_aid */
566 * Handles the tx for TDLS teardown frames.
567 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
569 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
570 struct ieee80211_sub_if_data *sdata,
571 struct sk_buff *skb, u32 flags)
573 struct sk_buff *teardown_skb;
574 struct sk_buff *orig_teardown_skb;
575 bool is_teardown = false;
577 /* Get the teardown data we need and free the lock */
578 spin_lock(&sdata->u.mgd.teardown_lock);
579 teardown_skb = sdata->u.mgd.teardown_skb;
580 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
581 if ((skb == orig_teardown_skb) && teardown_skb) {
582 sdata->u.mgd.teardown_skb = NULL;
583 sdata->u.mgd.orig_teardown_skb = NULL;
586 spin_unlock(&sdata->u.mgd.teardown_lock);
589 /* This mechanism relies on being able to get ACKs */
590 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
592 /* Check if peer has ACKed */
593 if (flags & IEEE80211_TX_STAT_ACK) {
594 dev_kfree_skb_any(teardown_skb);
597 "TDLS Resending teardown through AP\n");
599 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
604 static struct ieee80211_sub_if_data *
605 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
607 struct ieee80211_sub_if_data *sdata;
610 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
614 if (skb->dev == sdata->dev)
621 return rcu_dereference(local->p2p_sdata);
624 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
625 struct ieee80211_tx_info *info,
626 bool acked, bool dropped)
631 spin_lock_irqsave(&local->ack_status_lock, flags);
632 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
633 spin_unlock_irqrestore(&local->ack_status_lock, flags);
638 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
639 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
640 struct ieee80211_sub_if_data *sdata;
641 struct ieee80211_hdr *hdr = (void *)skb->data;
644 sdata = ieee80211_sdata_from_skb(local, skb);
646 if (ieee80211_is_nullfunc(hdr->frame_control) ||
647 ieee80211_is_qos_nullfunc(hdr->frame_control))
648 cfg80211_probe_status(sdata->dev, hdr->addr1,
650 info->status.ack_signal,
651 info->status.is_valid_ack_signal,
654 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
660 dev_kfree_skb_any(skb);
661 } else if (dropped) {
662 dev_kfree_skb_any(skb);
665 skb_complete_wifi_ack(skb, acked);
669 static void ieee80211_report_used_skb(struct ieee80211_local *local,
670 struct sk_buff *skb, bool dropped)
672 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
673 struct ieee80211_hdr *hdr = (void *)skb->data;
674 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
679 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
680 struct ieee80211_sub_if_data *sdata;
684 sdata = ieee80211_sdata_from_skb(local, skb);
689 unsigned int hdr_size =
690 ieee80211_hdrlen(hdr->frame_control);
692 /* Check to see if packet is a TDLS teardown packet */
693 if (ieee80211_is_data(hdr->frame_control) &&
694 (ieee80211_get_tdls_action(skb, hdr_size) ==
696 ieee80211_tdls_td_tx_handle(local, sdata, skb,
699 ieee80211_mgd_conn_tx_status(sdata,
705 } else if (info->ack_frame_id) {
706 ieee80211_report_ack_skb(local, info, acked, dropped);
709 if (!dropped && skb->destructor) {
710 skb->wifi_acked_valid = 1;
711 skb->wifi_acked = acked;
714 ieee80211_led_tx(local);
716 if (skb_has_frag_list(skb)) {
717 kfree_skb_list(skb_shinfo(skb)->frag_list);
718 skb_shinfo(skb)->frag_list = NULL;
723 * Use a static threshold for now, best value to be determined
725 * Should it depend on:
726 * - on # of retransmissions
727 * - current throughput (higher value for higher tpt)?
729 #define STA_LOST_PKT_THRESHOLD 50
730 #define STA_LOST_TDLS_PKT_THRESHOLD 10
731 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
733 static void ieee80211_lost_packet(struct sta_info *sta,
734 struct ieee80211_tx_info *info)
736 /* If driver relies on its own algorithm for station kickout, skip
737 * mac80211 packet loss mechanism.
739 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
742 /* This packet was aggregated but doesn't carry status info */
743 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
744 !(info->flags & IEEE80211_TX_STAT_AMPDU))
747 sta->status_stats.lost_packets++;
748 if (!sta->sta.tdls &&
749 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
753 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
754 * of the last packets were lost, and that no ACK was received in the
755 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
759 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
761 sta->status_stats.last_tdls_pkt_time +
762 STA_LOST_TDLS_PKT_TIME)))
765 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
766 sta->status_stats.lost_packets, GFP_ATOMIC);
767 sta->status_stats.lost_packets = 0;
770 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
771 struct ieee80211_tx_info *info,
778 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
779 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
780 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
781 /* just the first aggr frame carry status info */
782 info->status.rates[i].idx = -1;
783 info->status.rates[i].count = 0;
785 } else if (info->status.rates[i].idx < 0) {
787 } else if (i >= hw->max_report_rates) {
788 /* the HW cannot have attempted that rate */
789 info->status.rates[i].idx = -1;
790 info->status.rates[i].count = 0;
794 count += info->status.rates[i].count;
801 *retry_count = count;
805 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
806 struct ieee80211_supported_band *sband,
807 int retry_count, int shift, bool send_to_cooked,
808 struct ieee80211_tx_status *status)
810 struct sk_buff *skb2;
811 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
812 struct ieee80211_sub_if_data *sdata;
813 struct net_device *prev_dev = NULL;
816 /* send frame to monitor interfaces now */
817 rtap_len = ieee80211_tx_radiotap_len(info, status);
818 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
819 pr_err("ieee80211_tx_status: headroom too small\n");
823 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
824 rtap_len, shift, status);
826 /* XXX: is this sufficient for BPF? */
827 skb_reset_mac_header(skb);
828 skb->ip_summed = CHECKSUM_UNNECESSARY;
829 skb->pkt_type = PACKET_OTHERHOST;
830 skb->protocol = htons(ETH_P_802_2);
831 memset(skb->cb, 0, sizeof(skb->cb));
834 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
835 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
836 if (!ieee80211_sdata_running(sdata))
839 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
844 skb2 = skb_clone(skb, GFP_ATOMIC);
846 skb2->dev = prev_dev;
851 prev_dev = sdata->dev;
863 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
864 struct ieee80211_tx_status *status)
866 struct sk_buff *skb = status->skb;
867 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
868 struct ieee80211_local *local = hw_to_local(hw);
869 struct ieee80211_tx_info *info = status->info;
870 struct sta_info *sta;
872 struct ieee80211_supported_band *sband;
877 struct ieee80211_bar *bar;
879 int tid = IEEE80211_NUM_TIDS;
881 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
883 sband = local->hw.wiphy->bands[info->band];
884 fc = hdr->frame_control;
887 sta = container_of(status->sta, struct sta_info, sta);
888 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
890 if (info->flags & IEEE80211_TX_STATUS_EOSP)
891 clear_sta_flag(sta, WLAN_STA_SP);
893 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
895 /* mesh Peer Service Period support */
896 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
897 ieee80211_is_data_qos(fc))
898 ieee80211_mpsp_trigger_process(
899 ieee80211_get_qos_ctl(hdr), sta, true, acked);
901 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
903 * The STA is in power save mode, so assume
904 * that this TX packet failed because of that.
906 ieee80211_handle_filtered_frame(local, sta, skb);
910 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
911 (ieee80211_is_data(hdr->frame_control)) &&
913 sta->tx_stats.last_rate =
914 info->status.rates[rates_idx];
916 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
917 (ieee80211_is_data_qos(fc))) {
921 qc = ieee80211_get_qos_ctl(hdr);
923 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
924 & IEEE80211_SCTL_SEQ);
925 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
927 } else if (ieee80211_is_data_qos(fc)) {
928 u8 *qc = ieee80211_get_qos_ctl(hdr);
933 if (!acked && ieee80211_is_back_req(fc)) {
937 * BAR failed, store the last SSN and retry sending
938 * the BAR when the next unicast transmission on the
941 bar = (struct ieee80211_bar *) skb->data;
942 control = le16_to_cpu(bar->control);
943 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
944 u16 ssn = le16_to_cpu(bar->start_seq_num);
947 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
948 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
950 ieee80211_set_bar_pending(sta, tid, ssn);
954 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
955 ieee80211_handle_filtered_frame(local, sta, skb);
959 sta->status_stats.retry_failed++;
960 sta->status_stats.retry_count += retry_count;
962 if (ieee80211_is_data_present(fc)) {
964 sta->status_stats.msdu_failed[tid]++;
966 sta->status_stats.msdu_retries[tid] +=
971 rate_control_tx_status(local, sband, status);
972 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
973 ieee80211s_update_metric(local, sta, status);
975 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
976 ieee80211_frame_acked(sta, skb);
978 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
979 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
980 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
981 acked, info->status.tx_time);
983 if (info->status.tx_time &&
984 wiphy_ext_feature_isset(local->hw.wiphy,
985 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
986 ieee80211_sta_register_airtime(&sta->sta, tid,
987 info->status.tx_time, 0);
989 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
990 if (info->flags & IEEE80211_TX_STAT_ACK) {
991 if (sta->status_stats.lost_packets)
992 sta->status_stats.lost_packets = 0;
994 /* Track when last TDLS packet was ACKed */
995 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
996 sta->status_stats.last_tdls_pkt_time =
999 ieee80211_lost_packet(sta, info);
1005 * Fragments are passed to low-level drivers as separate skbs, so these
1006 * are actually fragments, not frames. Update frame counters only for
1007 * the first fragment of the frame. */
1008 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1009 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1010 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1011 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1012 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1013 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1014 if (retry_count > 0)
1015 I802_DEBUG_INC(local->dot11RetryCount);
1016 if (retry_count > 1)
1017 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1020 /* This counter shall be incremented for an acknowledged MPDU
1021 * with an individual address in the address 1 field or an MPDU
1022 * with a multicast address in the address 1 field of type Data
1024 if (!is_multicast_ether_addr(hdr->addr1) ||
1025 ieee80211_is_data(fc) ||
1026 ieee80211_is_mgmt(fc))
1027 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1029 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1030 I802_DEBUG_INC(local->dot11FailedCount);
1033 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
1034 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1035 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1036 local->ps_sdata && !(local->scanning)) {
1037 if (info->flags & IEEE80211_TX_STAT_ACK) {
1038 local->ps_sdata->u.mgd.flags |=
1039 IEEE80211_STA_NULLFUNC_ACKED;
1041 mod_timer(&local->dynamic_ps_timer, jiffies +
1042 msecs_to_jiffies(10));
1045 ieee80211_report_used_skb(local, skb, false);
1047 /* this was a transmitted frame, but now we want to reuse it */
1050 /* Need to make a copy before skb->cb gets cleared */
1051 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1052 !(ieee80211_is_data(fc));
1055 * This is a bit racy but we can avoid a lot of work
1058 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1063 /* send to monitor interfaces */
1064 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1065 send_to_cooked, status);
1068 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1070 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1071 struct ieee80211_local *local = hw_to_local(hw);
1072 struct ieee80211_tx_status status = {
1074 .info = IEEE80211_SKB_CB(skb),
1076 struct rhlist_head *tmp;
1077 struct sta_info *sta;
1081 for_each_sta_info(local, hdr->addr1, sta, tmp) {
1082 /* skip wrong virtual interface */
1083 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
1086 status.sta = &sta->sta;
1090 __ieee80211_tx_status(hw, &status);
1093 EXPORT_SYMBOL(ieee80211_tx_status);
1095 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1096 struct ieee80211_tx_status *status)
1098 struct ieee80211_local *local = hw_to_local(hw);
1099 struct ieee80211_tx_info *info = status->info;
1100 struct ieee80211_sta *pubsta = status->sta;
1101 struct ieee80211_supported_band *sband;
1103 bool acked, noack_success;
1106 return __ieee80211_tx_status(hw, status);
1111 ieee80211_tx_get_rates(hw, info, &retry_count);
1113 sband = hw->wiphy->bands[info->band];
1115 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1116 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1119 struct sta_info *sta;
1121 sta = container_of(pubsta, struct sta_info, sta);
1124 sta->status_stats.retry_failed++;
1125 sta->status_stats.retry_count += retry_count;
1128 sta->status_stats.last_ack = jiffies;
1130 if (sta->status_stats.lost_packets)
1131 sta->status_stats.lost_packets = 0;
1133 /* Track when last TDLS packet was ACKed */
1134 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1135 sta->status_stats.last_tdls_pkt_time = jiffies;
1136 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1139 ieee80211_lost_packet(sta, info);
1142 rate_control_tx_status(local, sband, status);
1143 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1144 ieee80211s_update_metric(local, sta, status);
1147 if (acked || noack_success) {
1148 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1150 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1151 if (retry_count > 0)
1152 I802_DEBUG_INC(local->dot11RetryCount);
1153 if (retry_count > 1)
1154 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1156 I802_DEBUG_INC(local->dot11FailedCount);
1159 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1161 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1162 struct ieee80211_sta *pubsta,
1163 struct ieee80211_tx_info *info)
1165 struct ieee80211_local *local = hw_to_local(hw);
1166 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1167 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1168 struct ieee80211_tx_status status = {
1173 rate_control_tx_status(local, sband, &status);
1175 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1176 sta->tx_stats.last_rate = info->status.rates[0];
1178 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1180 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1182 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1183 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1184 num_packets, GFP_ATOMIC);
1186 EXPORT_SYMBOL(ieee80211_report_low_ack);
1188 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1190 struct ieee80211_local *local = hw_to_local(hw);
1192 ieee80211_report_used_skb(local, skb, true);
1193 dev_kfree_skb_any(skb);
1195 EXPORT_SYMBOL(ieee80211_free_txskb);
1197 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1198 struct sk_buff_head *skbs)
1200 struct sk_buff *skb;
1202 while ((skb = __skb_dequeue(skbs)))
1203 ieee80211_free_txskb(hw, skb);