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
8 * Copyright 2021-2022 Intel Corporation
11 #include <linux/export.h>
12 #include <linux/etherdevice.h>
13 #include <net/mac80211.h>
14 #include <asm/unaligned.h>
15 #include "ieee80211_i.h"
22 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
25 struct ieee80211_local *local = hw_to_local(hw);
26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
29 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
30 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
31 &local->skb_queue : &local->skb_queue_unreliable, skb);
32 tmp = skb_queue_len(&local->skb_queue) +
33 skb_queue_len(&local->skb_queue_unreliable);
34 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
35 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
36 ieee80211_free_txskb(hw, skb);
38 I802_DEBUG_INC(local->tx_status_drop);
40 tasklet_schedule(&local->tasklet);
42 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
44 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
49 struct ieee80211_hdr *hdr = (void *)skb->data;
52 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
53 IEEE80211_TX_CTL_AMPDU |
54 IEEE80211_TX_CTL_HW_80211_ENCAP)) {
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->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
72 info->flags |= 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_is_data_qos(mgmt->frame_control)) {
191 struct ieee80211_hdr *hdr = (void *) skb->data;
192 u8 *qc = ieee80211_get_qos_ctl(hdr);
193 u16 tid = qc[0] & 0xf;
195 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
198 if (ieee80211_is_action(mgmt->frame_control) &&
199 !ieee80211_has_protected(mgmt->frame_control) &&
200 mgmt->u.action.category == WLAN_CATEGORY_HT &&
201 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
202 ieee80211_sdata_running(sdata)) {
203 enum ieee80211_smps_mode smps_mode;
205 switch (mgmt->u.action.u.ht_smps.smps_control) {
206 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
207 smps_mode = IEEE80211_SMPS_DYNAMIC;
209 case WLAN_HT_SMPS_CONTROL_STATIC:
210 smps_mode = IEEE80211_SMPS_STATIC;
212 case WLAN_HT_SMPS_CONTROL_DISABLED:
213 default: /* shouldn't happen since we don't send that */
214 smps_mode = IEEE80211_SMPS_OFF;
218 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
220 * This update looks racy, but isn't -- if we come
221 * here we've definitely got a station that we're
222 * talking to, and on a managed interface that can
223 * only be the AP. And the only other place updating
224 * this variable in managed mode is before association.
226 sdata->smps_mode = smps_mode;
227 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
228 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
229 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
230 sta->known_smps_mode = smps_mode;
235 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
237 struct tid_ampdu_tx *tid_tx;
239 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
243 tid_tx->failed_bar_ssn = ssn;
244 tid_tx->bar_pending = true;
247 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
248 struct ieee80211_tx_status *status)
250 int len = sizeof(struct ieee80211_radiotap_header);
252 /* IEEE80211_RADIOTAP_RATE rate */
253 if (status && status->rate && !(status->rate->flags &
254 (RATE_INFO_FLAGS_MCS |
255 RATE_INFO_FLAGS_DMG |
256 RATE_INFO_FLAGS_EDMG |
257 RATE_INFO_FLAGS_VHT_MCS |
258 RATE_INFO_FLAGS_HE_MCS)))
260 else if (info->status.rates[0].idx >= 0 &&
261 !(info->status.rates[0].flags &
262 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
265 /* IEEE80211_RADIOTAP_TX_FLAGS */
268 /* IEEE80211_RADIOTAP_DATA_RETRIES */
271 /* IEEE80211_RADIOTAP_MCS
272 * IEEE80211_RADIOTAP_VHT */
273 if (status && status->rate) {
274 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
276 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
277 len = ALIGN(len, 2) + 12;
278 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
279 len = ALIGN(len, 2) + 12;
280 } else if (info->status.rates[0].idx >= 0) {
281 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
283 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
284 len = ALIGN(len, 2) + 12;
291 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
292 struct ieee80211_supported_band *sband,
293 struct sk_buff *skb, int retry_count,
294 int rtap_len, int shift,
295 struct ieee80211_tx_status *status)
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
299 struct ieee80211_radiotap_header *rthdr;
304 rthdr = skb_push(skb, rtap_len);
306 memset(rthdr, 0, rtap_len);
307 rthdr->it_len = cpu_to_le16(rtap_len);
309 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) |
310 BIT(IEEE80211_RADIOTAP_DATA_RETRIES));
311 pos = (unsigned char *)(rthdr + 1);
314 * XXX: Once radiotap gets the bitmap reset thing the vendor
315 * extensions proposal contains, we can actually report
316 * the whole set of tries we did.
319 /* IEEE80211_RADIOTAP_RATE */
321 if (status && status->rate) {
322 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
323 RATE_INFO_FLAGS_DMG |
324 RATE_INFO_FLAGS_EDMG |
325 RATE_INFO_FLAGS_VHT_MCS |
326 RATE_INFO_FLAGS_HE_MCS)))
327 legacy_rate = status->rate->legacy;
328 } else if (info->status.rates[0].idx >= 0 &&
329 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
330 IEEE80211_TX_RC_VHT_MCS)))
332 sband->bitrates[info->status.rates[0].idx].bitrate;
335 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
336 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
337 /* padding for tx flags */
341 /* IEEE80211_RADIOTAP_TX_FLAGS */
343 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
344 !is_multicast_ether_addr(hdr->addr1))
345 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
347 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
348 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
349 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
350 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
352 put_unaligned_le16(txflags, pos);
355 /* IEEE80211_RADIOTAP_DATA_RETRIES */
356 /* for now report the total retry_count */
360 if (status && status->rate &&
361 (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
362 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
363 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
364 IEEE80211_RADIOTAP_MCS_HAVE_GI |
365 IEEE80211_RADIOTAP_MCS_HAVE_BW;
366 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
367 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
368 if (status->rate->bw == RATE_INFO_BW_40)
369 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
370 pos[2] = status->rate->mcs;
372 } else if (status && status->rate &&
373 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
374 u16 known = local->hw.radiotap_vht_details &
375 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
376 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
378 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
380 /* required alignment from rthdr */
381 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
383 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
384 put_unaligned_le16(known, pos);
387 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
388 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
389 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
393 switch (status->rate->bw) {
394 case RATE_INFO_BW_160:
397 case RATE_INFO_BW_80:
400 case RATE_INFO_BW_40:
410 *pos = (status->rate->mcs << 4) | status->rate->nss;
417 /* u16 partial_aid */
419 } else if (status && status->rate &&
420 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
421 struct ieee80211_radiotap_he *he;
423 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE));
425 /* required alignment from rthdr */
426 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
427 he = (struct ieee80211_radiotap_he *)pos;
429 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
430 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
431 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
432 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
434 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
436 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
438 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
440 #define CHECK_GI(s) \
441 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
442 (int)NL80211_RATE_INFO_HE_GI_##s)
448 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
449 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
451 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
453 switch (status->rate->bw) {
454 case RATE_INFO_BW_20:
455 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
456 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
458 case RATE_INFO_BW_40:
459 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
460 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
462 case RATE_INFO_BW_80:
463 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
464 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
466 case RATE_INFO_BW_160:
467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
470 case RATE_INFO_BW_HE_RU:
471 #define CHECK_RU_ALLOC(s) \
472 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
473 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
481 CHECK_RU_ALLOC(2x996);
483 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
484 status->rate->he_ru_alloc + 4);
487 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
490 pos += sizeof(struct ieee80211_radiotap_he);
493 if ((status && status->rate) || info->status.rates[0].idx < 0)
496 /* IEEE80211_RADIOTAP_MCS
497 * IEEE80211_RADIOTAP_VHT */
498 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
499 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
500 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
501 IEEE80211_RADIOTAP_MCS_HAVE_GI |
502 IEEE80211_RADIOTAP_MCS_HAVE_BW;
503 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
504 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
505 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
506 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
507 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
508 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
509 pos[2] = info->status.rates[0].idx;
511 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
512 u16 known = local->hw.radiotap_vht_details &
513 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
514 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
516 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
518 /* required alignment from rthdr */
519 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
521 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
522 put_unaligned_le16(known, pos);
525 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
526 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
527 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
531 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
533 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
535 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
537 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
542 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
543 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
550 /* u16 partial_aid */
556 * Handles the tx for TDLS teardown frames.
557 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
559 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
560 struct ieee80211_sub_if_data *sdata,
561 struct sk_buff *skb, u32 flags)
563 struct sk_buff *teardown_skb;
564 struct sk_buff *orig_teardown_skb;
565 bool is_teardown = false;
567 /* Get the teardown data we need and free the lock */
568 spin_lock(&sdata->u.mgd.teardown_lock);
569 teardown_skb = sdata->u.mgd.teardown_skb;
570 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
571 if ((skb == orig_teardown_skb) && teardown_skb) {
572 sdata->u.mgd.teardown_skb = NULL;
573 sdata->u.mgd.orig_teardown_skb = NULL;
576 spin_unlock(&sdata->u.mgd.teardown_lock);
579 /* This mechanism relies on being able to get ACKs */
580 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
582 /* Check if peer has ACKed */
583 if (flags & IEEE80211_TX_STAT_ACK) {
584 dev_kfree_skb_any(teardown_skb);
587 "TDLS Resending teardown through AP\n");
589 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
594 static struct ieee80211_sub_if_data *
595 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
597 struct ieee80211_sub_if_data *sdata;
600 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
604 if (skb->dev == sdata->dev)
611 return rcu_dereference(local->p2p_sdata);
614 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
615 struct ieee80211_tx_info *info,
616 bool acked, bool dropped)
621 spin_lock_irqsave(&local->ack_status_lock, flags);
622 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
623 spin_unlock_irqrestore(&local->ack_status_lock, flags);
628 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
629 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
630 struct ieee80211_sub_if_data *sdata;
631 struct ieee80211_hdr *hdr = (void *)skb->data;
632 bool is_valid_ack_signal =
633 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
636 sdata = ieee80211_sdata_from_skb(local, skb);
638 if (skb->protocol == sdata->control_port_protocol ||
639 skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
640 cfg80211_control_port_tx_status(&sdata->wdev,
646 else if (ieee80211_is_any_nullfunc(hdr->frame_control))
647 cfg80211_probe_status(sdata->dev, hdr->addr1,
649 info->status.ack_signal,
652 else if (ieee80211_is_mgmt(hdr->frame_control))
653 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
657 pr_warn("Unknown status report in ack skb\n");
662 dev_kfree_skb_any(skb);
663 } else if (dropped) {
664 dev_kfree_skb_any(skb);
667 skb_complete_wifi_ack(skb, acked);
671 static void ieee80211_report_used_skb(struct ieee80211_local *local,
672 struct sk_buff *skb, bool dropped)
674 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
675 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
676 struct ieee80211_hdr *hdr = (void *)skb->data;
677 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
683 struct sta_info *sta;
687 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
688 ieee80211_sta_update_pending_airtime(local, sta,
689 skb_get_queue_mapping(skb),
695 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
696 struct ieee80211_sub_if_data *sdata;
700 sdata = ieee80211_sdata_from_skb(local, skb);
705 unsigned int hdr_size =
706 ieee80211_hdrlen(hdr->frame_control);
708 /* Check to see if packet is a TDLS teardown packet */
709 if (ieee80211_is_data(hdr->frame_control) &&
710 (ieee80211_get_tdls_action(skb, hdr_size) ==
711 WLAN_TDLS_TEARDOWN)) {
712 ieee80211_tdls_td_tx_handle(local, sdata, skb,
714 } else if (ieee80211_s1g_is_twt_setup(skb)) {
716 struct sk_buff *qskb;
718 qskb = skb_clone(skb, GFP_ATOMIC);
720 skb_queue_tail(&sdata->status_queue,
722 ieee80211_queue_work(&local->hw,
727 ieee80211_mgd_conn_tx_status(sdata,
734 } else if (info->ack_frame_id) {
735 ieee80211_report_ack_skb(local, info, acked, dropped);
738 if (!dropped && skb->destructor) {
739 skb->wifi_acked_valid = 1;
740 skb->wifi_acked = acked;
743 ieee80211_led_tx(local);
745 if (skb_has_frag_list(skb)) {
746 kfree_skb_list(skb_shinfo(skb)->frag_list);
747 skb_shinfo(skb)->frag_list = NULL;
752 * Use a static threshold for now, best value to be determined
754 * Should it depend on:
755 * - on # of retransmissions
756 * - current throughput (higher value for higher tpt)?
758 #define STA_LOST_PKT_THRESHOLD 50
759 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
760 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
762 static void ieee80211_lost_packet(struct sta_info *sta,
763 struct ieee80211_tx_info *info)
765 unsigned long pkt_time = STA_LOST_PKT_TIME;
766 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
768 /* If driver relies on its own algorithm for station kickout, skip
769 * mac80211 packet loss mechanism.
771 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
774 /* This packet was aggregated but doesn't carry status info */
775 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
776 !(info->flags & IEEE80211_TX_STAT_AMPDU))
779 sta->status_stats.lost_packets++;
781 pkt_time = STA_LOST_TDLS_PKT_TIME;
782 pkt_thr = STA_LOST_PKT_THRESHOLD;
786 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
787 * of the last packets were lost, and that no ACK was received in the
788 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
790 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
792 if (sta->status_stats.lost_packets < pkt_thr ||
793 !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time))
796 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
797 sta->status_stats.lost_packets, GFP_ATOMIC);
798 sta->status_stats.lost_packets = 0;
801 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
802 struct ieee80211_tx_info *info,
808 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
809 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
810 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
811 /* just the first aggr frame carry status info */
812 info->status.rates[i].idx = -1;
813 info->status.rates[i].count = 0;
815 } else if (info->status.rates[i].idx < 0) {
817 } else if (i >= hw->max_report_rates) {
818 /* the HW cannot have attempted that rate */
819 info->status.rates[i].idx = -1;
820 info->status.rates[i].count = 0;
824 count += info->status.rates[i].count;
830 *retry_count = count;
834 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
835 struct ieee80211_supported_band *sband,
836 int retry_count, int shift, bool send_to_cooked,
837 struct ieee80211_tx_status *status)
839 struct sk_buff *skb2;
840 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
841 struct ieee80211_sub_if_data *sdata;
842 struct net_device *prev_dev = NULL;
845 /* send frame to monitor interfaces now */
846 rtap_len = ieee80211_tx_radiotap_len(info, status);
847 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
848 pr_err("ieee80211_tx_status: headroom too small\n");
852 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
853 rtap_len, shift, status);
855 /* XXX: is this sufficient for BPF? */
856 skb_reset_mac_header(skb);
857 skb->ip_summed = CHECKSUM_UNNECESSARY;
858 skb->pkt_type = PACKET_OTHERHOST;
859 skb->protocol = htons(ETH_P_802_2);
860 memset(skb->cb, 0, sizeof(skb->cb));
863 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
864 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
865 if (!ieee80211_sdata_running(sdata))
868 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
873 skb2 = skb_clone(skb, GFP_ATOMIC);
875 skb2->dev = prev_dev;
880 prev_dev = sdata->dev;
892 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
893 struct ieee80211_tx_status *status,
894 int rates_idx, int retry_count)
896 struct sk_buff *skb = status->skb;
897 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
898 struct ieee80211_local *local = hw_to_local(hw);
899 struct ieee80211_tx_info *info = status->info;
900 struct sta_info *sta;
902 struct ieee80211_supported_band *sband;
906 struct ieee80211_bar *bar;
908 int tid = IEEE80211_NUM_TIDS;
910 sband = local->hw.wiphy->bands[info->band];
911 fc = hdr->frame_control;
914 sta = container_of(status->sta, struct sta_info, sta);
915 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
917 if (info->flags & IEEE80211_TX_STATUS_EOSP)
918 clear_sta_flag(sta, WLAN_STA_SP);
920 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
921 noack_success = !!(info->flags &
922 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
924 /* mesh Peer Service Period support */
925 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
926 ieee80211_is_data_qos(fc))
927 ieee80211_mpsp_trigger_process(
928 ieee80211_get_qos_ctl(hdr), sta, true, acked);
930 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
931 (ieee80211_is_data(hdr->frame_control)) &&
933 sta->tx_stats.last_rate =
934 info->status.rates[rates_idx];
936 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
937 (ieee80211_is_data_qos(fc))) {
941 qc = ieee80211_get_qos_ctl(hdr);
943 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
944 & IEEE80211_SCTL_SEQ);
945 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
947 } else if (ieee80211_is_data_qos(fc)) {
948 u8 *qc = ieee80211_get_qos_ctl(hdr);
953 if (!acked && ieee80211_is_back_req(fc)) {
957 * BAR failed, store the last SSN and retry sending
958 * the BAR when the next unicast transmission on the
961 bar = (struct ieee80211_bar *) skb->data;
962 control = le16_to_cpu(bar->control);
963 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
964 u16 ssn = le16_to_cpu(bar->start_seq_num);
967 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
968 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
970 ieee80211_set_bar_pending(sta, tid, ssn);
974 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
975 ieee80211_handle_filtered_frame(local, sta, skb);
977 } else if (ieee80211_is_data_present(fc)) {
978 if (!acked && !noack_success)
979 sta->status_stats.msdu_failed[tid]++;
981 sta->status_stats.msdu_retries[tid] +=
985 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
986 ieee80211_frame_acked(sta, skb);
988 } else if (wiphy_ext_feature_isset(local->hw.wiphy,
989 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) {
990 struct ieee80211_sub_if_data *sdata;
991 struct ieee80211_txq *txq;
994 /* Account airtime to multicast queue */
995 sdata = ieee80211_sdata_from_skb(local, skb);
997 if (sdata && (txq = sdata->vif.txq)) {
998 airtime = info->status.tx_time ?:
999 ieee80211_calc_expected_tx_airtime(hw,
1005 ieee80211_register_airtime(txq, airtime, 0);
1010 * Fragments are passed to low-level drivers as separate skbs, so these
1011 * are actually fragments, not frames. Update frame counters only for
1012 * the first fragment of the frame. */
1013 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1014 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1015 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1016 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1017 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1018 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1019 if (retry_count > 0)
1020 I802_DEBUG_INC(local->dot11RetryCount);
1021 if (retry_count > 1)
1022 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1025 /* This counter shall be incremented for an acknowledged MPDU
1026 * with an individual address in the address 1 field or an MPDU
1027 * with a multicast address in the address 1 field of type Data
1029 if (!is_multicast_ether_addr(hdr->addr1) ||
1030 ieee80211_is_data(fc) ||
1031 ieee80211_is_mgmt(fc))
1032 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1034 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1035 I802_DEBUG_INC(local->dot11FailedCount);
1038 if (ieee80211_is_any_nullfunc(fc) &&
1039 ieee80211_has_pm(fc) &&
1040 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1041 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1042 local->ps_sdata && !(local->scanning)) {
1043 if (info->flags & IEEE80211_TX_STAT_ACK)
1044 local->ps_sdata->u.mgd.flags |=
1045 IEEE80211_STA_NULLFUNC_ACKED;
1046 mod_timer(&local->dynamic_ps_timer,
1047 jiffies + msecs_to_jiffies(10));
1050 ieee80211_report_used_skb(local, skb, false);
1052 /* this was a transmitted frame, but now we want to reuse it */
1055 /* Need to make a copy before skb->cb gets cleared */
1056 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1057 !(ieee80211_is_data(fc));
1060 * This is a bit racy but we can avoid a lot of work
1063 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1064 if (status->free_list)
1065 list_add_tail(&skb->list, status->free_list);
1071 /* send to monitor interfaces */
1072 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1073 send_to_cooked, status);
1076 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1078 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1079 struct ieee80211_local *local = hw_to_local(hw);
1080 struct ieee80211_tx_status status = {
1082 .info = IEEE80211_SKB_CB(skb),
1084 struct sta_info *sta;
1088 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1090 status.sta = &sta->sta;
1092 ieee80211_tx_status_ext(hw, &status);
1095 EXPORT_SYMBOL(ieee80211_tx_status);
1097 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1098 struct ieee80211_tx_status *status)
1100 struct ieee80211_local *local = hw_to_local(hw);
1101 struct ieee80211_tx_info *info = status->info;
1102 struct ieee80211_sta *pubsta = status->sta;
1103 struct sk_buff *skb = status->skb;
1104 struct ieee80211_supported_band *sband;
1105 struct sta_info *sta = NULL;
1106 int rates_idx, retry_count;
1107 bool acked, noack_success, ack_signal_valid;
1111 sta = container_of(pubsta, struct sta_info, sta);
1114 sta->tx_stats.last_rate_info = *status->rate;
1117 if (skb && (tx_time_est =
1118 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1119 /* Do this here to avoid the expensive lookup of the sta
1120 * in ieee80211_report_used_skb().
1122 ieee80211_sta_update_pending_airtime(local, sta,
1123 skb_get_queue_mapping(skb),
1126 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1132 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1134 sband = hw->wiphy->bands[info->band];
1136 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1137 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1139 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1142 struct ieee80211_sub_if_data *sdata = sta->sdata;
1144 if (!acked && !noack_success)
1145 sta->status_stats.retry_failed++;
1146 sta->status_stats.retry_count += retry_count;
1148 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1149 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1150 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1151 ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1152 acked, info->status.tx_time);
1155 sta->status_stats.last_ack = jiffies;
1157 if (sta->status_stats.lost_packets)
1158 sta->status_stats.lost_packets = 0;
1160 /* Track when last packet was ACKed */
1161 sta->status_stats.last_pkt_time = jiffies;
1163 /* Reset connection monitor */
1164 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1165 unlikely(sdata->u.mgd.probe_send_count > 0))
1166 sdata->u.mgd.probe_send_count = 0;
1168 if (ack_signal_valid) {
1169 sta->status_stats.last_ack_signal =
1170 (s8)info->status.ack_signal;
1171 sta->status_stats.ack_signal_filled = true;
1172 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
1173 -info->status.ack_signal);
1175 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1177 * The STA is in power save mode, so assume
1178 * that this TX packet failed because of that.
1181 ieee80211_handle_filtered_frame(local, sta, skb);
1183 } else if (noack_success) {
1184 /* nothing to do here, do not account as lost */
1186 ieee80211_lost_packet(sta, info);
1190 rate_control_tx_status(local, sband, status);
1191 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1192 ieee80211s_update_metric(local, sta, status);
1195 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1196 return __ieee80211_tx_status(hw, status, rates_idx,
1199 if (acked || noack_success) {
1200 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1202 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1203 if (retry_count > 0)
1204 I802_DEBUG_INC(local->dot11RetryCount);
1205 if (retry_count > 1)
1206 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1208 I802_DEBUG_INC(local->dot11FailedCount);
1215 ieee80211_report_used_skb(local, skb, false);
1216 if (status->free_list)
1217 list_add_tail(&skb->list, status->free_list);
1221 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1223 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1224 struct ieee80211_sta *pubsta,
1225 struct ieee80211_tx_info *info)
1227 struct ieee80211_local *local = hw_to_local(hw);
1228 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1229 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1230 struct ieee80211_tx_status status = {
1235 rate_control_tx_status(local, sband, &status);
1237 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1238 sta->tx_stats.last_rate = info->status.rates[0];
1240 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1242 void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1243 struct ieee80211_vif *vif,
1244 struct sk_buff *skb)
1246 struct ieee80211_sub_if_data *sdata;
1247 struct ieee80211_tx_status status = {
1249 .info = IEEE80211_SKB_CB(skb),
1251 struct sta_info *sta;
1253 sdata = vif_to_sdata(vif);
1257 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta))
1258 status.sta = &sta->sta;
1260 ieee80211_tx_status_ext(hw, &status);
1264 EXPORT_SYMBOL(ieee80211_tx_status_8023);
1266 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1268 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1269 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1270 num_packets, GFP_ATOMIC);
1272 EXPORT_SYMBOL(ieee80211_report_low_ack);
1274 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1276 struct ieee80211_local *local = hw_to_local(hw);
1278 ieee80211_report_used_skb(local, skb, true);
1279 dev_kfree_skb_any(skb);
1281 EXPORT_SYMBOL(ieee80211_free_txskb);
1283 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1284 struct sk_buff_head *skbs)
1286 struct sk_buff *skb;
1288 while ((skb = __skb_dequeue(skbs)))
1289 ieee80211_free_txskb(hw, skb);