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->deflink.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 struct ieee80211_rate_status *status_rate = NULL;
251 int len = sizeof(struct ieee80211_radiotap_header);
253 if (status && status->n_rates)
254 status_rate = &status->rates[status->n_rates - 1];
256 /* IEEE80211_RADIOTAP_RATE rate */
257 if (status_rate && !(status_rate->rate_idx.flags &
258 (RATE_INFO_FLAGS_MCS |
259 RATE_INFO_FLAGS_DMG |
260 RATE_INFO_FLAGS_EDMG |
261 RATE_INFO_FLAGS_VHT_MCS |
262 RATE_INFO_FLAGS_HE_MCS)))
264 else if (info->status.rates[0].idx >= 0 &&
265 !(info->status.rates[0].flags &
266 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
269 /* IEEE80211_RADIOTAP_TX_FLAGS */
272 /* IEEE80211_RADIOTAP_DATA_RETRIES */
275 /* IEEE80211_RADIOTAP_MCS
276 * IEEE80211_RADIOTAP_VHT */
278 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)
280 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS)
281 len = ALIGN(len, 2) + 12;
282 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS)
283 len = ALIGN(len, 2) + 12;
284 } else if (info->status.rates[0].idx >= 0) {
285 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
287 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
288 len = ALIGN(len, 2) + 12;
295 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
296 struct ieee80211_supported_band *sband,
297 struct sk_buff *skb, int retry_count,
298 int rtap_len, int shift,
299 struct ieee80211_tx_status *status)
301 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
302 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
303 struct ieee80211_radiotap_header *rthdr;
304 struct ieee80211_rate_status *status_rate = NULL;
309 if (status && status->n_rates)
310 status_rate = &status->rates[status->n_rates - 1];
312 rthdr = skb_push(skb, rtap_len);
314 memset(rthdr, 0, rtap_len);
315 rthdr->it_len = cpu_to_le16(rtap_len);
317 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) |
318 BIT(IEEE80211_RADIOTAP_DATA_RETRIES));
319 pos = (unsigned char *)(rthdr + 1);
322 * XXX: Once radiotap gets the bitmap reset thing the vendor
323 * extensions proposal contains, we can actually report
324 * the whole set of tries we did.
327 /* IEEE80211_RADIOTAP_RATE */
330 if (!(status_rate->rate_idx.flags &
331 (RATE_INFO_FLAGS_MCS |
332 RATE_INFO_FLAGS_DMG |
333 RATE_INFO_FLAGS_EDMG |
334 RATE_INFO_FLAGS_VHT_MCS |
335 RATE_INFO_FLAGS_HE_MCS)))
336 legacy_rate = status_rate->rate_idx.legacy;
337 } else if (info->status.rates[0].idx >= 0 &&
338 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
339 IEEE80211_TX_RC_VHT_MCS)))
341 sband->bitrates[info->status.rates[0].idx].bitrate;
344 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
345 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
346 /* padding for tx flags */
350 /* IEEE80211_RADIOTAP_TX_FLAGS */
352 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
353 !is_multicast_ether_addr(hdr->addr1))
354 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
356 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
357 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
358 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
359 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
361 put_unaligned_le16(txflags, pos);
364 /* IEEE80211_RADIOTAP_DATA_RETRIES */
365 /* for now report the total retry_count */
369 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS))
371 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
372 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
373 IEEE80211_RADIOTAP_MCS_HAVE_GI |
374 IEEE80211_RADIOTAP_MCS_HAVE_BW;
375 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
376 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
377 if (status_rate->rate_idx.bw == RATE_INFO_BW_40)
378 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
379 pos[2] = status_rate->rate_idx.mcs;
381 } else if (status_rate && (status_rate->rate_idx.flags &
382 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(BIT(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->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
403 switch (status_rate->rate_idx.bw) {
404 case RATE_INFO_BW_160:
407 case RATE_INFO_BW_80:
410 case RATE_INFO_BW_40:
420 *pos = (status_rate->rate_idx.mcs << 4) |
421 status_rate->rate_idx.nss;
428 /* u16 partial_aid */
430 } else if (status_rate && (status_rate->rate_idx.flags &
431 RATE_INFO_FLAGS_HE_MCS))
433 struct ieee80211_radiotap_he *he;
435 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE));
437 /* required alignment from rthdr */
438 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
439 he = (struct ieee80211_radiotap_he *)pos;
441 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
442 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
443 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
444 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
446 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
448 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
450 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss);
452 #define CHECK_GI(s) \
453 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
454 (int)NL80211_RATE_INFO_HE_GI_##s)
460 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs);
461 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm);
463 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi);
465 switch (status_rate->rate_idx.bw) {
466 case RATE_INFO_BW_20:
467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
470 case RATE_INFO_BW_40:
471 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
472 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
474 case RATE_INFO_BW_80:
475 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
476 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
478 case RATE_INFO_BW_160:
479 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
480 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
482 case RATE_INFO_BW_HE_RU:
483 #define CHECK_RU_ALLOC(s) \
484 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
485 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
493 CHECK_RU_ALLOC(2x996);
495 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
496 status_rate->rate_idx.he_ru_alloc + 4);
499 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw);
502 pos += sizeof(struct ieee80211_radiotap_he);
505 if (status_rate || info->status.rates[0].idx < 0)
508 /* IEEE80211_RADIOTAP_MCS
509 * IEEE80211_RADIOTAP_VHT */
510 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
511 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
512 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
513 IEEE80211_RADIOTAP_MCS_HAVE_GI |
514 IEEE80211_RADIOTAP_MCS_HAVE_BW;
515 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
516 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
517 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
518 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
519 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
520 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
521 pos[2] = info->status.rates[0].idx;
523 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
524 u16 known = local->hw.radiotap_vht_details &
525 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
526 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
528 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
530 /* required alignment from rthdr */
531 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
533 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
534 put_unaligned_le16(known, pos);
537 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
538 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
539 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
543 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
547 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
549 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
554 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
555 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
562 /* u16 partial_aid */
568 * Handles the tx for TDLS teardown frames.
569 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
571 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 struct sk_buff *skb, u32 flags)
575 struct sk_buff *teardown_skb;
576 struct sk_buff *orig_teardown_skb;
577 bool is_teardown = false;
579 /* Get the teardown data we need and free the lock */
580 spin_lock(&sdata->u.mgd.teardown_lock);
581 teardown_skb = sdata->u.mgd.teardown_skb;
582 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
583 if ((skb == orig_teardown_skb) && teardown_skb) {
584 sdata->u.mgd.teardown_skb = NULL;
585 sdata->u.mgd.orig_teardown_skb = NULL;
588 spin_unlock(&sdata->u.mgd.teardown_lock);
591 /* This mechanism relies on being able to get ACKs */
592 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
594 /* Check if peer has ACKed */
595 if (flags & IEEE80211_TX_STAT_ACK) {
596 dev_kfree_skb_any(teardown_skb);
599 "TDLS Resending teardown through AP\n");
601 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
606 static struct ieee80211_sub_if_data *
607 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
609 struct ieee80211_sub_if_data *sdata;
612 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
616 if (skb->dev == sdata->dev)
623 return rcu_dereference(local->p2p_sdata);
626 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
627 struct ieee80211_tx_info *info,
628 bool acked, bool dropped)
633 spin_lock_irqsave(&local->ack_status_lock, flags);
634 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
635 spin_unlock_irqrestore(&local->ack_status_lock, flags);
640 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
641 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
642 struct ieee80211_sub_if_data *sdata;
643 struct ieee80211_hdr *hdr = (void *)skb->data;
644 bool is_valid_ack_signal =
645 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
648 sdata = ieee80211_sdata_from_skb(local, skb);
650 if (skb->protocol == sdata->control_port_protocol ||
651 skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
652 cfg80211_control_port_tx_status(&sdata->wdev,
658 else if (ieee80211_is_any_nullfunc(hdr->frame_control))
659 cfg80211_probe_status(sdata->dev, hdr->addr1,
661 info->status.ack_signal,
664 else if (ieee80211_is_mgmt(hdr->frame_control))
665 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
669 pr_warn("Unknown status report in ack skb\n");
674 dev_kfree_skb_any(skb);
675 } else if (dropped) {
676 dev_kfree_skb_any(skb);
679 skb_complete_wifi_ack(skb, acked);
683 static void ieee80211_report_used_skb(struct ieee80211_local *local,
684 struct sk_buff *skb, bool dropped)
686 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
687 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
688 struct ieee80211_hdr *hdr = (void *)skb->data;
689 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
695 struct sta_info *sta;
699 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
700 ieee80211_sta_update_pending_airtime(local, sta,
701 skb_get_queue_mapping(skb),
707 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
708 struct ieee80211_sub_if_data *sdata;
712 sdata = ieee80211_sdata_from_skb(local, skb);
717 unsigned int hdr_size =
718 ieee80211_hdrlen(hdr->frame_control);
720 /* Check to see if packet is a TDLS teardown packet */
721 if (ieee80211_is_data(hdr->frame_control) &&
722 (ieee80211_get_tdls_action(skb, hdr_size) ==
723 WLAN_TDLS_TEARDOWN)) {
724 ieee80211_tdls_td_tx_handle(local, sdata, skb,
726 } else if (ieee80211_s1g_is_twt_setup(skb)) {
728 struct sk_buff *qskb;
730 qskb = skb_clone(skb, GFP_ATOMIC);
732 skb_queue_tail(&sdata->status_queue,
734 ieee80211_queue_work(&local->hw,
739 ieee80211_mgd_conn_tx_status(sdata,
746 } else if (info->ack_frame_id) {
747 ieee80211_report_ack_skb(local, info, acked, dropped);
750 if (!dropped && skb->destructor) {
751 skb->wifi_acked_valid = 1;
752 skb->wifi_acked = acked;
755 ieee80211_led_tx(local);
757 if (skb_has_frag_list(skb)) {
758 kfree_skb_list(skb_shinfo(skb)->frag_list);
759 skb_shinfo(skb)->frag_list = NULL;
764 * Use a static threshold for now, best value to be determined
766 * Should it depend on:
767 * - on # of retransmissions
768 * - current throughput (higher value for higher tpt)?
770 #define STA_LOST_PKT_THRESHOLD 50
771 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
772 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
774 static void ieee80211_lost_packet(struct sta_info *sta,
775 struct ieee80211_tx_info *info)
777 unsigned long pkt_time = STA_LOST_PKT_TIME;
778 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
780 /* If driver relies on its own algorithm for station kickout, skip
781 * mac80211 packet loss mechanism.
783 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
786 /* This packet was aggregated but doesn't carry status info */
787 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
788 !(info->flags & IEEE80211_TX_STAT_AMPDU))
791 sta->deflink.status_stats.lost_packets++;
793 pkt_time = STA_LOST_TDLS_PKT_TIME;
794 pkt_thr = STA_LOST_PKT_THRESHOLD;
798 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
799 * of the last packets were lost, and that no ACK was received in the
800 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
802 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
804 if (sta->deflink.status_stats.lost_packets < pkt_thr ||
805 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time))
808 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
809 sta->deflink.status_stats.lost_packets,
811 sta->deflink.status_stats.lost_packets = 0;
814 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
815 struct ieee80211_tx_info *info,
821 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
822 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
823 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
824 /* just the first aggr frame carry status info */
825 info->status.rates[i].idx = -1;
826 info->status.rates[i].count = 0;
828 } else if (info->status.rates[i].idx < 0) {
830 } else if (i >= hw->max_report_rates) {
831 /* the HW cannot have attempted that rate */
832 info->status.rates[i].idx = -1;
833 info->status.rates[i].count = 0;
837 count += info->status.rates[i].count;
843 *retry_count = count;
847 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
848 struct ieee80211_supported_band *sband,
849 int retry_count, int shift, bool send_to_cooked,
850 struct ieee80211_tx_status *status)
852 struct sk_buff *skb2;
853 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
854 struct ieee80211_sub_if_data *sdata;
855 struct net_device *prev_dev = NULL;
858 /* send frame to monitor interfaces now */
859 rtap_len = ieee80211_tx_radiotap_len(info, status);
860 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
861 pr_err("ieee80211_tx_status: headroom too small\n");
865 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
866 rtap_len, shift, status);
868 /* XXX: is this sufficient for BPF? */
869 skb_reset_mac_header(skb);
870 skb->ip_summed = CHECKSUM_UNNECESSARY;
871 skb->pkt_type = PACKET_OTHERHOST;
872 skb->protocol = htons(ETH_P_802_2);
873 memset(skb->cb, 0, sizeof(skb->cb));
876 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
877 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
878 if (!ieee80211_sdata_running(sdata))
881 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
886 skb2 = skb_clone(skb, GFP_ATOMIC);
888 skb2->dev = prev_dev;
893 prev_dev = sdata->dev;
905 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
906 struct ieee80211_tx_status *status,
907 int rates_idx, int retry_count)
909 struct sk_buff *skb = status->skb;
910 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
911 struct ieee80211_local *local = hw_to_local(hw);
912 struct ieee80211_tx_info *info = status->info;
913 struct sta_info *sta;
915 struct ieee80211_supported_band *sband;
919 struct ieee80211_bar *bar;
921 int tid = IEEE80211_NUM_TIDS;
923 sband = local->hw.wiphy->bands[info->band];
924 fc = hdr->frame_control;
927 sta = container_of(status->sta, struct sta_info, sta);
928 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
930 if (info->flags & IEEE80211_TX_STATUS_EOSP)
931 clear_sta_flag(sta, WLAN_STA_SP);
933 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
934 noack_success = !!(info->flags &
935 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
937 /* mesh Peer Service Period support */
938 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
939 ieee80211_is_data_qos(fc))
940 ieee80211_mpsp_trigger_process(
941 ieee80211_get_qos_ctl(hdr), sta, true, acked);
943 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
944 (ieee80211_is_data(hdr->frame_control)) &&
946 sta->deflink.tx_stats.last_rate =
947 info->status.rates[rates_idx];
949 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
950 (ieee80211_is_data_qos(fc))) {
954 qc = ieee80211_get_qos_ctl(hdr);
956 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
957 & IEEE80211_SCTL_SEQ);
958 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
960 } else if (ieee80211_is_data_qos(fc)) {
961 u8 *qc = ieee80211_get_qos_ctl(hdr);
966 if (!acked && ieee80211_is_back_req(fc)) {
970 * BAR failed, store the last SSN and retry sending
971 * the BAR when the next unicast transmission on the
974 bar = (struct ieee80211_bar *) skb->data;
975 control = le16_to_cpu(bar->control);
976 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
977 u16 ssn = le16_to_cpu(bar->start_seq_num);
980 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
981 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
983 ieee80211_set_bar_pending(sta, tid, ssn);
987 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
988 ieee80211_handle_filtered_frame(local, sta, skb);
990 } else if (ieee80211_is_data_present(fc)) {
991 if (!acked && !noack_success)
992 sta->deflink.status_stats.msdu_failed[tid]++;
994 sta->deflink.status_stats.msdu_retries[tid] +=
998 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
999 ieee80211_frame_acked(sta, skb);
1001 } else if (wiphy_ext_feature_isset(local->hw.wiphy,
1002 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) {
1003 struct ieee80211_sub_if_data *sdata;
1004 struct ieee80211_txq *txq;
1007 /* Account airtime to multicast queue */
1008 sdata = ieee80211_sdata_from_skb(local, skb);
1010 if (sdata && (txq = sdata->vif.txq)) {
1011 airtime = info->status.tx_time ?:
1012 ieee80211_calc_expected_tx_airtime(hw,
1018 ieee80211_register_airtime(txq, airtime, 0);
1023 * Fragments are passed to low-level drivers as separate skbs, so these
1024 * are actually fragments, not frames. Update frame counters only for
1025 * the first fragment of the frame. */
1026 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1027 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1028 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1029 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1030 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1031 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1032 if (retry_count > 0)
1033 I802_DEBUG_INC(local->dot11RetryCount);
1034 if (retry_count > 1)
1035 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1038 /* This counter shall be incremented for an acknowledged MPDU
1039 * with an individual address in the address 1 field or an MPDU
1040 * with a multicast address in the address 1 field of type Data
1042 if (!is_multicast_ether_addr(hdr->addr1) ||
1043 ieee80211_is_data(fc) ||
1044 ieee80211_is_mgmt(fc))
1045 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1047 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1048 I802_DEBUG_INC(local->dot11FailedCount);
1051 if (ieee80211_is_any_nullfunc(fc) &&
1052 ieee80211_has_pm(fc) &&
1053 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1054 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1055 local->ps_sdata && !(local->scanning)) {
1056 if (info->flags & IEEE80211_TX_STAT_ACK)
1057 local->ps_sdata->u.mgd.flags |=
1058 IEEE80211_STA_NULLFUNC_ACKED;
1059 mod_timer(&local->dynamic_ps_timer,
1060 jiffies + msecs_to_jiffies(10));
1063 ieee80211_report_used_skb(local, skb, false);
1065 /* this was a transmitted frame, but now we want to reuse it */
1068 /* Need to make a copy before skb->cb gets cleared */
1069 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1070 !(ieee80211_is_data(fc));
1073 * This is a bit racy but we can avoid a lot of work
1076 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1077 if (status->free_list)
1078 list_add_tail(&skb->list, status->free_list);
1084 /* send to monitor interfaces */
1085 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1086 send_to_cooked, status);
1089 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1091 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1092 struct ieee80211_local *local = hw_to_local(hw);
1093 struct ieee80211_tx_status status = {
1095 .info = IEEE80211_SKB_CB(skb),
1097 struct sta_info *sta;
1101 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1103 status.sta = &sta->sta;
1105 ieee80211_tx_status_ext(hw, &status);
1108 EXPORT_SYMBOL(ieee80211_tx_status);
1110 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1111 struct ieee80211_tx_status *status)
1113 struct ieee80211_local *local = hw_to_local(hw);
1114 struct ieee80211_tx_info *info = status->info;
1115 struct ieee80211_sta *pubsta = status->sta;
1116 struct sk_buff *skb = status->skb;
1117 struct ieee80211_supported_band *sband;
1118 struct sta_info *sta = NULL;
1119 int rates_idx, retry_count;
1120 bool acked, noack_success, ack_signal_valid;
1124 sta = container_of(pubsta, struct sta_info, sta);
1126 if (status->n_rates)
1127 sta->deflink.tx_stats.last_rate_info =
1128 status->rates[status->n_rates - 1].rate_idx;
1131 if (skb && (tx_time_est =
1132 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1133 /* Do this here to avoid the expensive lookup of the sta
1134 * in ieee80211_report_used_skb().
1136 ieee80211_sta_update_pending_airtime(local, sta,
1137 skb_get_queue_mapping(skb),
1140 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1146 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1148 sband = hw->wiphy->bands[info->band];
1150 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1151 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1153 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1156 struct ieee80211_sub_if_data *sdata = sta->sdata;
1158 if (!acked && !noack_success)
1159 sta->deflink.status_stats.retry_failed++;
1160 sta->deflink.status_stats.retry_count += retry_count;
1162 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1163 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1164 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1165 ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1166 acked, info->status.tx_time);
1169 sta->deflink.status_stats.last_ack = jiffies;
1171 if (sta->deflink.status_stats.lost_packets)
1172 sta->deflink.status_stats.lost_packets = 0;
1174 /* Track when last packet was ACKed */
1175 sta->deflink.status_stats.last_pkt_time = jiffies;
1177 /* Reset connection monitor */
1178 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1179 unlikely(sdata->u.mgd.probe_send_count > 0))
1180 sdata->u.mgd.probe_send_count = 0;
1182 if (ack_signal_valid) {
1183 sta->deflink.status_stats.last_ack_signal =
1184 (s8)info->status.ack_signal;
1185 sta->deflink.status_stats.ack_signal_filled = true;
1186 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal,
1187 -info->status.ack_signal);
1189 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1191 * The STA is in power save mode, so assume
1192 * that this TX packet failed because of that.
1195 ieee80211_handle_filtered_frame(local, sta, skb);
1197 } else if (noack_success) {
1198 /* nothing to do here, do not account as lost */
1200 ieee80211_lost_packet(sta, info);
1204 rate_control_tx_status(local, sband, status);
1205 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1206 ieee80211s_update_metric(local, sta, status);
1209 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1210 return __ieee80211_tx_status(hw, status, rates_idx,
1213 if (acked || noack_success) {
1214 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1216 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1217 if (retry_count > 0)
1218 I802_DEBUG_INC(local->dot11RetryCount);
1219 if (retry_count > 1)
1220 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1222 I802_DEBUG_INC(local->dot11FailedCount);
1229 ieee80211_report_used_skb(local, skb, false);
1230 if (status->free_list)
1231 list_add_tail(&skb->list, status->free_list);
1235 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1237 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1238 struct ieee80211_sta *pubsta,
1239 struct ieee80211_tx_info *info)
1241 struct ieee80211_local *local = hw_to_local(hw);
1242 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1243 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1244 struct ieee80211_tx_status status = {
1249 rate_control_tx_status(local, sband, &status);
1251 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1252 sta->deflink.tx_stats.last_rate = info->status.rates[0];
1254 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1256 void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1257 struct ieee80211_vif *vif,
1258 struct sk_buff *skb)
1260 struct ieee80211_sub_if_data *sdata;
1261 struct ieee80211_tx_status status = {
1263 .info = IEEE80211_SKB_CB(skb),
1265 struct sta_info *sta;
1267 sdata = vif_to_sdata(vif);
1271 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta))
1272 status.sta = &sta->sta;
1274 ieee80211_tx_status_ext(hw, &status);
1278 EXPORT_SYMBOL(ieee80211_tx_status_8023);
1280 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1282 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1283 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1284 num_packets, GFP_ATOMIC);
1286 EXPORT_SYMBOL(ieee80211_report_low_ack);
1288 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1290 struct ieee80211_local *local = hw_to_local(hw);
1292 ieee80211_report_used_skb(local, skb, true);
1293 dev_kfree_skb_any(skb);
1295 EXPORT_SYMBOL(ieee80211_free_txskb);
1297 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1298 struct sk_buff_head *skbs)
1300 struct sk_buff *skb;
1302 while ((skb = __skb_dequeue(skbs)))
1303 ieee80211_free_txskb(hw, skb);