1// SPDX-License-Identifier: GPL-2.0-only
2/*
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 2021-2025 Intel Corporation
9 */
10
11#include <linux/export.h>
12#include <linux/etherdevice.h>
13#include <net/mac80211.h>
14#include <linux/unaligned.h>
15#include "ieee80211_i.h"
16#include "rate.h"
17#include "mesh.h"
18#include "led.h"
19#include "wme.h"
20
21
22void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
23 struct sk_buff *skb)
24{
25 struct ieee80211_local *local = hw_to_local(hw);
26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
27 int tmp;
28
29 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
30 skb_queue_tail(list: info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
31 &local->skb_queue : &local->skb_queue_unreliable, newsk: skb);
32 tmp = skb_queue_len(list_: &local->skb_queue) +
33 skb_queue_len(list_: &local->skb_queue_unreliable);
34 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
35 (skb = skb_dequeue(list: &local->skb_queue_unreliable))) {
36 ieee80211_free_txskb(hw, skb);
37 tmp--;
38 I802_DEBUG_INC(local->tx_status_drop);
39 }
40 tasklet_schedule(t: &local->tasklet);
41}
42EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
43
44static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
45 struct sta_info *sta,
46 struct sk_buff *skb)
47{
48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
49 struct ieee80211_hdr *hdr = (void *)skb->data;
50 int ac;
51
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(hw: &local->hw, skb);
56 return;
57 }
58
59 /*
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.
66 */
67 memset(s: &info->control, c: 0, n: sizeof(info->control));
68
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;
74
75 sta->deflink.status_stats.filtered++;
76
77 /*
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.
83 */
84 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
85 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
86
87 if (ieee80211_is_data_qos(fc: hdr->frame_control)) {
88 u8 *p = ieee80211_get_qos_ctl(hdr);
89 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
90
91 /*
92 * Clear EOSP if set, this could happen e.g.
93 * if an absence period (us being a P2P GO)
94 * shortens the SP.
95 */
96 if (*p & IEEE80211_QOS_CTL_EOSP)
97 *p &= ~IEEE80211_QOS_CTL_EOSP;
98 ac = ieee80211_ac_from_tid(tid);
99 } else {
100 ac = IEEE80211_AC_BE;
101 }
102
103 /*
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.
107 */
108 set_sta_flag(sta, flag: WLAN_STA_CLEAR_PS_FILT);
109 ieee80211_clear_fast_xmit(sta);
110
111 /*
112 * This code races in the following way:
113 *
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.
119 *
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.
127 *
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.
133 *
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
136 * functions and
137 * (b) always process RX events before TX status events if ordering
138 * can be unknown, for example with different interrupt status
139 * bits.
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
143 * unknown.
144 */
145 if (test_sta_flag(sta, flag: WLAN_STA_PS_STA) &&
146 skb_queue_len(list_: &sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
147 skb_queue_tail(list: &sta->tx_filtered[ac], newsk: skb);
148 sta_info_recalc_tim(sta);
149
150 if (!timer_pending(timer: &local->sta_cleanup))
151 mod_timer(timer: &local->sta_cleanup,
152 expires: round_jiffies(j: jiffies +
153 STA_INFO_CLEANUP_INTERVAL));
154 return;
155 }
156
157 if (!test_sta_flag(sta, flag: 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);
162 return;
163 }
164
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(hw: &local->hw, skb);
170}
171
172static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
173{
174 struct tid_ampdu_tx *tid_tx;
175
176 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
177 if (!tid_tx || !tid_tx->bar_pending)
178 return;
179
180 tid_tx->bar_pending = false;
181 ieee80211_send_bar(vif: &sta->sdata->vif, ra: addr, tid, ssn: tid_tx->failed_bar_ssn);
182}
183
184static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
185{
186 struct ieee80211_mgmt *mgmt = (void *) skb->data;
187
188 if (ieee80211_is_data_qos(fc: mgmt->frame_control)) {
189 struct ieee80211_hdr *hdr = (void *) skb->data;
190 u8 *qc = ieee80211_get_qos_ctl(hdr);
191 u16 tid = qc[0] & 0xf;
192
193 ieee80211_check_pending_bar(sta, addr: hdr->addr1, tid);
194 }
195}
196
197static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
198{
199 struct tid_ampdu_tx *tid_tx;
200
201 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
202 if (!tid_tx)
203 return;
204
205 tid_tx->failed_bar_ssn = ssn;
206 tid_tx->bar_pending = true;
207}
208
209static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
210 struct ieee80211_tx_status *status)
211{
212 struct ieee80211_rate_status *status_rate = NULL;
213 int len = sizeof(struct ieee80211_radiotap_header);
214
215 if (status && status->n_rates)
216 status_rate = &status->rates[status->n_rates - 1];
217
218 /* IEEE80211_RADIOTAP_RATE rate */
219 if (status_rate && !(status_rate->rate_idx.flags &
220 (RATE_INFO_FLAGS_MCS |
221 RATE_INFO_FLAGS_DMG |
222 RATE_INFO_FLAGS_EDMG |
223 RATE_INFO_FLAGS_VHT_MCS |
224 RATE_INFO_FLAGS_HE_MCS)))
225 len += 2;
226 else if (info->status.rates[0].idx >= 0 &&
227 !(info->status.rates[0].flags &
228 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
229 len += 2;
230
231 /* IEEE80211_RADIOTAP_TX_FLAGS */
232 len += 2;
233
234 /* IEEE80211_RADIOTAP_DATA_RETRIES */
235 len += 1;
236
237 /* IEEE80211_RADIOTAP_MCS
238 * IEEE80211_RADIOTAP_VHT */
239 if (status_rate) {
240 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)
241 len += 3;
242 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS)
243 len = ALIGN(len, 2) + 12;
244 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS)
245 len = ALIGN(len, 2) + 12;
246 } else if (info->status.rates[0].idx >= 0) {
247 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
248 len += 3;
249 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
250 len = ALIGN(len, 2) + 12;
251 }
252
253 return len;
254}
255
256static void
257ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
258 struct sk_buff *skb, int retry_count,
259 int rtap_len,
260 struct ieee80211_tx_status *status)
261{
262 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
263 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
264 struct ieee80211_radiotap_header *rthdr;
265 struct ieee80211_rate_status *status_rate = NULL;
266 unsigned char *pos;
267 u16 legacy_rate = 0;
268 u16 txflags;
269
270 if (status && status->n_rates)
271 status_rate = &status->rates[status->n_rates - 1];
272
273 rthdr = skb_push(skb, len: rtap_len);
274
275 memset(s: rthdr, c: 0, n: rtap_len);
276 rthdr->it_len = cpu_to_le16(rtap_len);
277 rthdr->it_present =
278 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) |
279 BIT(IEEE80211_RADIOTAP_DATA_RETRIES));
280 pos = (unsigned char *)(rthdr + 1);
281
282 /*
283 * XXX: Once radiotap gets the bitmap reset thing the vendor
284 * extensions proposal contains, we can actually report
285 * the whole set of tries we did.
286 */
287
288 /* IEEE80211_RADIOTAP_RATE */
289
290 if (status_rate) {
291 if (!(status_rate->rate_idx.flags &
292 (RATE_INFO_FLAGS_MCS |
293 RATE_INFO_FLAGS_DMG |
294 RATE_INFO_FLAGS_EDMG |
295 RATE_INFO_FLAGS_VHT_MCS |
296 RATE_INFO_FLAGS_HE_MCS)))
297 legacy_rate = status_rate->rate_idx.legacy;
298 } else if (info->status.rates[0].idx >= 0 &&
299 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
300 IEEE80211_TX_RC_VHT_MCS))) {
301 struct ieee80211_supported_band *sband;
302
303 sband = local->hw.wiphy->bands[info->band];
304 legacy_rate =
305 sband->bitrates[info->status.rates[0].idx].bitrate;
306 }
307
308 if (legacy_rate) {
309 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
310 *pos = DIV_ROUND_UP(legacy_rate, 5);
311 /* padding for tx flags */
312 pos += 2;
313 }
314
315 /* IEEE80211_RADIOTAP_TX_FLAGS */
316 txflags = 0;
317 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
318 !is_multicast_ether_addr(addr: hdr->addr1))
319 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
320
321 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
322 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
323 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
324 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
325
326 put_unaligned_le16(val: txflags, p: pos);
327 pos += 2;
328
329 /* IEEE80211_RADIOTAP_DATA_RETRIES */
330 /* for now report the total retry_count */
331 *pos = retry_count;
332 pos++;
333
334 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS))
335 {
336 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
337 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
338 IEEE80211_RADIOTAP_MCS_HAVE_GI |
339 IEEE80211_RADIOTAP_MCS_HAVE_BW;
340 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
341 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
342 if (status_rate->rate_idx.bw == RATE_INFO_BW_40)
343 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
344 pos[2] = status_rate->rate_idx.mcs;
345 pos += 3;
346 } else if (status_rate && (status_rate->rate_idx.flags &
347 RATE_INFO_FLAGS_VHT_MCS))
348 {
349 u16 known = local->hw.radiotap_vht_details &
350 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
351 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
352
353 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
354
355 /* required alignment from rthdr */
356 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
357
358 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
359 put_unaligned_le16(val: known, p: pos);
360 pos += 2;
361
362 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
363 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
364 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
365 pos++;
366
367 /* u8 bandwidth */
368 switch (status_rate->rate_idx.bw) {
369 case RATE_INFO_BW_160:
370 *pos = 11;
371 break;
372 case RATE_INFO_BW_80:
373 *pos = 4;
374 break;
375 case RATE_INFO_BW_40:
376 *pos = 1;
377 break;
378 default:
379 *pos = 0;
380 break;
381 }
382 pos++;
383
384 /* u8 mcs_nss[4] */
385 *pos = (status_rate->rate_idx.mcs << 4) |
386 status_rate->rate_idx.nss;
387 pos += 4;
388
389 /* u8 coding */
390 pos++;
391 /* u8 group_id */
392 pos++;
393 /* u16 partial_aid */
394 pos += 2;
395 } else if (status_rate && (status_rate->rate_idx.flags &
396 RATE_INFO_FLAGS_HE_MCS))
397 {
398 struct ieee80211_radiotap_he *he;
399
400 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE));
401
402 /* required alignment from rthdr */
403 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
404 he = (struct ieee80211_radiotap_he *)pos;
405
406 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
407 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
408 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
409 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
410
411 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
412
413#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
414
415 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss);
416
417#define CHECK_GI(s) \
418 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
419 (int)NL80211_RATE_INFO_HE_GI_##s)
420
421 CHECK_GI(0_8);
422 CHECK_GI(1_6);
423 CHECK_GI(3_2);
424
425 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs);
426 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm);
427
428 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi);
429
430 switch (status_rate->rate_idx.bw) {
431 case RATE_INFO_BW_20:
432 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
433 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
434 break;
435 case RATE_INFO_BW_40:
436 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
437 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
438 break;
439 case RATE_INFO_BW_80:
440 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
441 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
442 break;
443 case RATE_INFO_BW_160:
444 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
445 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
446 break;
447 case RATE_INFO_BW_HE_RU:
448#define CHECK_RU_ALLOC(s) \
449 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
450 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
451
452 CHECK_RU_ALLOC(26);
453 CHECK_RU_ALLOC(52);
454 CHECK_RU_ALLOC(106);
455 CHECK_RU_ALLOC(242);
456 CHECK_RU_ALLOC(484);
457 CHECK_RU_ALLOC(996);
458 CHECK_RU_ALLOC(2x996);
459
460 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
461 status_rate->rate_idx.he_ru_alloc + 4);
462 break;
463 default:
464 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw);
465 }
466
467 pos += sizeof(struct ieee80211_radiotap_he);
468 }
469
470 if (status_rate || info->status.rates[0].idx < 0)
471 return;
472
473 /* IEEE80211_RADIOTAP_MCS
474 * IEEE80211_RADIOTAP_VHT */
475 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
476 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
477 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
478 IEEE80211_RADIOTAP_MCS_HAVE_GI |
479 IEEE80211_RADIOTAP_MCS_HAVE_BW;
480 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
481 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
482 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
483 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
484 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
485 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
486 pos[2] = info->status.rates[0].idx;
487 pos += 3;
488 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
489 u16 known = local->hw.radiotap_vht_details &
490 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
491 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
492
493 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
494
495 /* required alignment from rthdr */
496 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
497
498 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
499 put_unaligned_le16(val: known, p: pos);
500 pos += 2;
501
502 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
503 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
504 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
505 pos++;
506
507 /* u8 bandwidth */
508 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
509 *pos = 1;
510 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
511 *pos = 4;
512 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
513 *pos = 11;
514 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
515 *pos = 0;
516 pos++;
517
518 /* u8 mcs_nss[4] */
519 *pos = (ieee80211_rate_get_vht_mcs(rate: &info->status.rates[0]) << 4) |
520 ieee80211_rate_get_vht_nss(rate: &info->status.rates[0]);
521 pos += 4;
522
523 /* u8 coding */
524 pos++;
525 /* u8 group_id */
526 pos++;
527 /* u16 partial_aid */
528 pos += 2;
529 }
530}
531
532/*
533 * Handles the tx for TDLS teardown frames.
534 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
535 */
536static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
537 struct ieee80211_sub_if_data *sdata,
538 struct sk_buff *skb, u32 flags)
539{
540 struct sk_buff *teardown_skb;
541 struct sk_buff *orig_teardown_skb;
542 bool is_teardown = false;
543
544 /* Get the teardown data we need and free the lock */
545 spin_lock(lock: &sdata->u.mgd.teardown_lock);
546 teardown_skb = sdata->u.mgd.teardown_skb;
547 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
548 if ((skb == orig_teardown_skb) && teardown_skb) {
549 sdata->u.mgd.teardown_skb = NULL;
550 sdata->u.mgd.orig_teardown_skb = NULL;
551 is_teardown = true;
552 }
553 spin_unlock(lock: &sdata->u.mgd.teardown_lock);
554
555 if (is_teardown) {
556 /* This mechanism relies on being able to get ACKs */
557 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
558
559 /* Check if peer has ACKed */
560 if (flags & IEEE80211_TX_STAT_ACK) {
561 dev_kfree_skb_any(skb: teardown_skb);
562 } else {
563 tdls_dbg(sdata,
564 "TDLS Resending teardown through AP\n");
565
566 ieee80211_subif_start_xmit(skb: teardown_skb, dev: skb->dev);
567 }
568 }
569}
570
571static struct ieee80211_sub_if_data *
572ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
573{
574 struct ieee80211_sub_if_data *sdata;
575 struct ieee80211_hdr *hdr = (void *)skb->data;
576
577 if (skb->dev) {
578 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
579 if (!sdata->dev)
580 continue;
581
582 if (skb->dev == sdata->dev)
583 return sdata;
584 }
585
586 return NULL;
587 }
588
589 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
590 switch (sdata->vif.type) {
591 case NL80211_IFTYPE_P2P_DEVICE:
592 break;
593 case NL80211_IFTYPE_NAN:
594 if (sdata->u.nan.started)
595 break;
596 fallthrough;
597 default:
598 continue;
599 }
600
601 if (ether_addr_equal(addr1: sdata->vif.addr, addr2: hdr->addr2))
602 return sdata;
603 }
604
605 return NULL;
606}
607
608static void ieee80211_report_ack_skb(struct ieee80211_local *local,
609 struct sk_buff *orig_skb,
610 bool acked, bool dropped,
611 ktime_t ack_hwtstamp)
612{
613 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: orig_skb);
614 struct sk_buff *skb;
615 unsigned long flags;
616
617 spin_lock_irqsave(&local->ack_status_lock, flags);
618 skb = idr_remove(&local->ack_status_frames, id: info->status_data);
619 spin_unlock_irqrestore(lock: &local->ack_status_lock, flags);
620
621 if (!skb)
622 return;
623
624 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
625 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
626 struct ieee80211_sub_if_data *sdata;
627 struct ieee80211_hdr *hdr = (void *)skb->data;
628 bool is_valid_ack_signal =
629 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
630 struct cfg80211_tx_status status = {
631 .cookie = cookie,
632 .buf = skb->data,
633 .len = skb->len,
634 .ack = acked,
635 };
636
637 if (ieee80211_is_timing_measurement(skb: orig_skb) ||
638 ieee80211_is_ftm(skb: orig_skb)) {
639 status.tx_tstamp =
640 ktime_to_ns(kt: skb_hwtstamps(skb: orig_skb)->hwtstamp);
641 status.ack_tstamp = ktime_to_ns(kt: ack_hwtstamp);
642 }
643
644 rcu_read_lock();
645 sdata = ieee80211_sdata_from_skb(local, skb);
646 if (sdata) {
647 if (skb->protocol == sdata->control_port_protocol ||
648 skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
649 cfg80211_control_port_tx_status(wdev: &sdata->wdev,
650 cookie,
651 buf: skb->data,
652 len: skb->len,
653 ack: acked,
654 GFP_ATOMIC);
655 else if (ieee80211_is_any_nullfunc(fc: hdr->frame_control))
656 cfg80211_probe_status(dev: sdata->dev, addr: hdr->addr1,
657 cookie, acked,
658 ack_signal: info->status.ack_signal,
659 is_valid_ack_signal,
660 GFP_ATOMIC);
661 else if (ieee80211_is_mgmt(fc: hdr->frame_control))
662 cfg80211_mgmt_tx_status_ext(wdev: &sdata->wdev,
663 status: &status,
664 GFP_ATOMIC);
665 else
666 pr_warn("Unknown status report in ack skb\n");
667
668 }
669 rcu_read_unlock();
670
671 dev_kfree_skb_any(skb);
672 } else if (dropped) {
673 dev_kfree_skb_any(skb);
674 } else {
675 /* consumes skb */
676 skb_complete_wifi_ack(skb, acked);
677 }
678}
679
680static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata,
681 bool acked, u16 status_data)
682{
683 u16 sub_data = u16_get_bits(v: status_data, field: IEEE80211_STATUS_SUBDATA_MASK);
684 enum ieee80211_smps_mode smps_mode = sub_data & 3;
685 int link_id = (sub_data >> 2);
686 struct ieee80211_link_data *link;
687
688 if (!sdata || !ieee80211_sdata_running(sdata))
689 return;
690
691 if (!acked)
692 return;
693
694 if (sdata->vif.type != NL80211_IFTYPE_STATION)
695 return;
696
697 if (WARN(link_id >= ARRAY_SIZE(sdata->link),
698 "bad SMPS status link: %d\n", link_id))
699 return;
700
701 link = rcu_dereference(sdata->link[link_id]);
702 if (!link)
703 return;
704
705 /*
706 * This update looks racy, but isn't, the only other place
707 * updating this variable is in managed mode before assoc,
708 * and we have to be associated to have a status from the
709 * action frame TX, since we cannot send it while we're not
710 * associated yet.
711 */
712 link->smps_mode = smps_mode;
713 wiphy_work_queue(wiphy: sdata->local->hw.wiphy, work: &link->u.mgd.recalc_smps);
714}
715
716static void
717ieee80211_handle_teardown_ttlm_status(struct ieee80211_sub_if_data *sdata,
718 bool acked)
719{
720 if (!sdata || !ieee80211_sdata_running(sdata))
721 return;
722
723 if (!acked)
724 return;
725
726 if (sdata->vif.type != NL80211_IFTYPE_STATION)
727 return;
728
729 wiphy_work_queue(wiphy: sdata->local->hw.wiphy,
730 work: &sdata->u.mgd.teardown_ttlm_work);
731}
732
733static void ieee80211_report_used_skb(struct ieee80211_local *local,
734 struct sk_buff *skb, bool dropped,
735 ktime_t ack_hwtstamp)
736{
737 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
738 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
739 struct ieee80211_hdr *hdr = (void *)skb->data;
740 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
741
742 if (dropped)
743 acked = false;
744
745 if (tx_time_est) {
746 struct sta_info *sta;
747
748 rcu_read_lock();
749
750 sta = sta_info_get_by_addrs(local, sta_addr: hdr->addr1, vif_addr: hdr->addr2);
751 ieee80211_sta_update_pending_airtime(local, sta,
752 ac: skb_get_queue_mapping(skb),
753 tx_airtime: tx_time_est,
754 tx_completed: true);
755 rcu_read_unlock();
756 }
757
758 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
759 struct ieee80211_sub_if_data *sdata;
760
761 rcu_read_lock();
762
763 sdata = ieee80211_sdata_from_skb(local, skb);
764
765 if (!sdata) {
766 skb->dev = NULL;
767 } else if (!dropped) {
768 /* Check to see if packet is a TDLS teardown packet */
769 if (ieee80211_is_data(fc: hdr->frame_control) &&
770 (ieee80211_get_tdls_action(skb) ==
771 WLAN_TDLS_TEARDOWN)) {
772 ieee80211_tdls_td_tx_handle(local, sdata, skb,
773 flags: info->flags);
774 } else if (ieee80211_s1g_is_twt_setup(skb)) {
775 if (!acked) {
776 struct sk_buff *qskb;
777
778 qskb = skb_clone(skb, GFP_ATOMIC);
779 if (qskb) {
780 skb_queue_tail(list: &sdata->status_queue,
781 newsk: qskb);
782 wiphy_work_queue(wiphy: local->hw.wiphy,
783 work: &sdata->work);
784 }
785 }
786 } else {
787 ieee80211_mgd_conn_tx_status(sdata,
788 fc: hdr->frame_control,
789 acked);
790 }
791 }
792
793 rcu_read_unlock();
794 } else if (info->status_data_idr) {
795 ieee80211_report_ack_skb(local, orig_skb: skb, acked, dropped,
796 ack_hwtstamp);
797 } else if (info->status_data) {
798 struct ieee80211_sub_if_data *sdata;
799
800 rcu_read_lock();
801
802 sdata = ieee80211_sdata_from_skb(local, skb);
803
804 switch (u16_get_bits(v: info->status_data,
805 field: IEEE80211_STATUS_TYPE_MASK)) {
806 case IEEE80211_STATUS_TYPE_SMPS:
807 ieee80211_handle_smps_status(sdata, acked,
808 status_data: info->status_data);
809 break;
810 case IEEE80211_STATUS_TYPE_NEG_TTLM:
811 ieee80211_handle_teardown_ttlm_status(sdata, acked);
812 break;
813 }
814 rcu_read_unlock();
815 }
816
817 if (!dropped && skb->destructor) {
818 skb->wifi_acked_valid = 1;
819 skb->wifi_acked = acked;
820 }
821
822 ieee80211_led_tx(local);
823
824 if (skb_has_frag_list(skb)) {
825 kfree_skb_list(skb_shinfo(skb)->frag_list);
826 skb_shinfo(skb)->frag_list = NULL;
827 }
828}
829
830/*
831 * Use a static threshold for now, best value to be determined
832 * by testing ...
833 * Should it depend on:
834 * - on # of retransmissions
835 * - current throughput (higher value for higher tpt)?
836 */
837#define STA_LOST_PKT_THRESHOLD 50
838#define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
839#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
840
841static void ieee80211_lost_packet(struct sta_info *sta,
842 struct ieee80211_tx_info *info)
843{
844 unsigned long pkt_time = STA_LOST_PKT_TIME;
845 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
846
847 /* If driver relies on its own algorithm for station kickout, skip
848 * mac80211 packet loss mechanism.
849 */
850 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
851 return;
852
853 /* This packet was aggregated but doesn't carry status info */
854 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
855 !(info->flags & IEEE80211_TX_STAT_AMPDU))
856 return;
857
858 sta->deflink.status_stats.lost_packets++;
859 if (sta->sta.tdls) {
860 pkt_time = STA_LOST_TDLS_PKT_TIME;
861 pkt_thr = STA_LOST_PKT_THRESHOLD;
862 }
863
864 /*
865 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
866 * of the last packets were lost, and that no ACK was received in the
867 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
868 * mechanism.
869 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
870 */
871 if (sta->deflink.status_stats.lost_packets < pkt_thr ||
872 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time))
873 return;
874
875 cfg80211_cqm_pktloss_notify(dev: sta->sdata->dev, peer: sta->sta.addr,
876 num_packets: sta->deflink.status_stats.lost_packets,
877 GFP_ATOMIC);
878 sta->deflink.status_stats.lost_packets = 0;
879}
880
881static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
882 struct ieee80211_tx_info *info,
883 int *retry_count)
884{
885 int count = -1;
886 int i;
887
888 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
889 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
890 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
891 /* just the first aggr frame carry status info */
892 info->status.rates[i].idx = -1;
893 info->status.rates[i].count = 0;
894 break;
895 } else if (info->status.rates[i].idx < 0) {
896 break;
897 } else if (i >= hw->max_report_rates) {
898 /* the HW cannot have attempted that rate */
899 info->status.rates[i].idx = -1;
900 info->status.rates[i].count = 0;
901 break;
902 }
903
904 count += info->status.rates[i].count;
905 }
906
907 if (count < 0)
908 count = 0;
909
910 *retry_count = count;
911 return i - 1;
912}
913
914void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
915 int retry_count, struct ieee80211_tx_status *status)
916{
917 struct sk_buff *skb2;
918 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
919 struct ieee80211_sub_if_data *sdata;
920 struct net_device *prev_dev = NULL;
921 int rtap_len;
922
923 /* send frame to monitor interfaces now */
924 rtap_len = ieee80211_tx_radiotap_len(info, status);
925 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
926 pr_err("ieee80211_tx_status: headroom too small\n");
927 dev_kfree_skb(skb);
928 return;
929 }
930 ieee80211_add_tx_radiotap_header(local, skb, retry_count,
931 rtap_len, status);
932
933 /* XXX: is this sufficient for BPF? */
934 skb_reset_mac_header(skb);
935 skb->ip_summed = CHECKSUM_UNNECESSARY;
936 skb->pkt_type = PACKET_OTHERHOST;
937 skb->protocol = htons(ETH_P_802_2);
938 memset(s: skb->cb, c: 0, n: sizeof(skb->cb));
939
940 rcu_read_lock();
941 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
942 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
943 if (!ieee80211_sdata_running(sdata))
944 continue;
945
946 if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX)
947 continue;
948
949 if (prev_dev) {
950 skb2 = skb_clone(skb, GFP_ATOMIC);
951 if (skb2) {
952 skb2->dev = prev_dev;
953 netif_rx(skb: skb2);
954 }
955 }
956
957 prev_dev = sdata->dev;
958 }
959 }
960 if (prev_dev) {
961 skb->dev = prev_dev;
962 netif_rx(skb);
963 skb = NULL;
964 }
965 rcu_read_unlock();
966 dev_kfree_skb(skb);
967}
968
969static void __ieee80211_tx_status(struct ieee80211_hw *hw,
970 struct ieee80211_tx_status *status,
971 int rates_idx, int retry_count)
972{
973 struct sk_buff *skb = status->skb;
974 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
975 struct ieee80211_local *local = hw_to_local(hw);
976 struct ieee80211_tx_info *info = status->info;
977 struct sta_info *sta;
978 __le16 fc;
979 bool acked;
980 bool noack_success;
981 struct ieee80211_bar *bar;
982 int tid = IEEE80211_NUM_TIDS;
983
984 fc = hdr->frame_control;
985
986 if (status->sta) {
987 sta = container_of(status->sta, struct sta_info, sta);
988
989 if (info->flags & IEEE80211_TX_STATUS_EOSP)
990 clear_sta_flag(sta, flag: WLAN_STA_SP);
991
992 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
993 noack_success = !!(info->flags &
994 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
995
996 /* mesh Peer Service Period support */
997 if (ieee80211_vif_is_mesh(vif: &sta->sdata->vif) &&
998 ieee80211_is_data_qos(fc))
999 ieee80211_mpsp_trigger_process(
1000 qc: ieee80211_get_qos_ctl(hdr), sta, tx: true, acked);
1001
1002 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
1003 (ieee80211_is_data(fc: hdr->frame_control)) &&
1004 (rates_idx != -1))
1005 sta->deflink.tx_stats.last_rate =
1006 info->status.rates[rates_idx];
1007
1008 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1009 (ieee80211_is_data_qos(fc))) {
1010 u16 ssn;
1011 u8 *qc;
1012
1013 qc = ieee80211_get_qos_ctl(hdr);
1014 tid = qc[0] & 0xf;
1015 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1016 & IEEE80211_SCTL_SEQ);
1017 ieee80211_send_bar(vif: &sta->sdata->vif, ra: hdr->addr1,
1018 tid, ssn);
1019 } else if (ieee80211_is_data_qos(fc)) {
1020 u8 *qc = ieee80211_get_qos_ctl(hdr);
1021
1022 tid = qc[0] & 0xf;
1023 }
1024
1025 if (!acked && ieee80211_is_back_req(fc)) {
1026 u16 control;
1027
1028 /*
1029 * BAR failed, store the last SSN and retry sending
1030 * the BAR when the next unicast transmission on the
1031 * same TID succeeds.
1032 */
1033 bar = (struct ieee80211_bar *) skb->data;
1034 control = le16_to_cpu(bar->control);
1035 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
1036 u16 ssn = le16_to_cpu(bar->start_seq_num);
1037
1038 tid = (control &
1039 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
1040 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
1041
1042 ieee80211_set_bar_pending(sta, tid, ssn);
1043 }
1044 }
1045
1046 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1047 ieee80211_handle_filtered_frame(local, sta, skb);
1048 return;
1049 } else if (ieee80211_is_data_present(fc)) {
1050 if (!acked && !noack_success)
1051 sta->deflink.status_stats.msdu_failed[tid]++;
1052
1053 sta->deflink.status_stats.msdu_retries[tid] +=
1054 retry_count;
1055 }
1056
1057 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
1058 ieee80211_frame_acked(sta, skb);
1059
1060 }
1061
1062 /* SNMP counters
1063 * Fragments are passed to low-level drivers as separate skbs, so these
1064 * are actually fragments, not frames. Update frame counters only for
1065 * the first fragment of the frame. */
1066 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1067 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1068 if (ieee80211_is_first_frag(seq_ctrl: hdr->seq_ctrl)) {
1069 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1070 if (is_multicast_ether_addr(addr: ieee80211_get_DA(hdr)))
1071 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1072 if (retry_count > 0)
1073 I802_DEBUG_INC(local->dot11RetryCount);
1074 if (retry_count > 1)
1075 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1076 }
1077
1078 /* This counter shall be incremented for an acknowledged MPDU
1079 * with an individual address in the address 1 field or an MPDU
1080 * with a multicast address in the address 1 field of type Data
1081 * or Management. */
1082 if (!is_multicast_ether_addr(addr: hdr->addr1) ||
1083 ieee80211_is_data(fc) ||
1084 ieee80211_is_mgmt(fc))
1085 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1086 } else {
1087 if (ieee80211_is_first_frag(seq_ctrl: hdr->seq_ctrl))
1088 I802_DEBUG_INC(local->dot11FailedCount);
1089 }
1090
1091 if (ieee80211_is_any_nullfunc(fc) &&
1092 ieee80211_has_pm(fc) &&
1093 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1094 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1095 local->ps_sdata && !(local->scanning)) {
1096 if (info->flags & IEEE80211_TX_STAT_ACK)
1097 local->ps_sdata->u.mgd.flags |=
1098 IEEE80211_STA_NULLFUNC_ACKED;
1099 mod_timer(timer: &local->dynamic_ps_timer,
1100 expires: jiffies + msecs_to_jiffies(m: 10));
1101 }
1102
1103 ieee80211_report_used_skb(local, skb, dropped: false, ack_hwtstamp: status->ack_hwtstamp);
1104
1105 /*
1106 * This is a bit racy but we can avoid a lot of work
1107 * with this test...
1108 */
1109 if (local->tx_mntrs)
1110 ieee80211_tx_monitor(local, skb, retry_count, status);
1111 else if (status->free_list)
1112 list_add_tail(new: &skb->list, head: status->free_list);
1113 else
1114 dev_kfree_skb(skb);
1115}
1116
1117void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb)
1118{
1119 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1120 struct ieee80211_local *local = hw_to_local(hw);
1121 struct ieee80211_tx_status status = {
1122 .skb = skb,
1123 .info = IEEE80211_SKB_CB(skb),
1124 };
1125 struct sta_info *sta;
1126
1127 rcu_read_lock();
1128
1129 sta = sta_info_get_by_addrs(local, sta_addr: hdr->addr1, vif_addr: hdr->addr2);
1130 if (sta)
1131 status.sta = &sta->sta;
1132
1133 ieee80211_tx_status_ext(hw, status: &status);
1134 rcu_read_unlock();
1135}
1136EXPORT_SYMBOL(ieee80211_tx_status_skb);
1137
1138void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1139 struct ieee80211_tx_status *status)
1140{
1141 struct ieee80211_local *local = hw_to_local(hw);
1142 struct ieee80211_tx_info *info = status->info;
1143 struct ieee80211_sta *pubsta = status->sta;
1144 struct sk_buff *skb = status->skb;
1145 struct sta_info *sta = NULL;
1146 int rates_idx, retry_count;
1147 bool acked, noack_success, ack_signal_valid;
1148 u16 tx_time_est;
1149
1150 if (pubsta) {
1151 sta = container_of(pubsta, struct sta_info, sta);
1152
1153 if (status->n_rates)
1154 sta->deflink.tx_stats.last_rate_info =
1155 status->rates[status->n_rates - 1].rate_idx;
1156 }
1157
1158 if (skb && (tx_time_est =
1159 ieee80211_info_get_tx_time_est(info: IEEE80211_SKB_CB(skb))) > 0) {
1160 /* Do this here to avoid the expensive lookup of the sta
1161 * in ieee80211_report_used_skb().
1162 */
1163 ieee80211_sta_update_pending_airtime(local, sta,
1164 ac: skb_get_queue_mapping(skb),
1165 tx_airtime: tx_time_est,
1166 tx_completed: true);
1167 ieee80211_info_set_tx_time_est(info: IEEE80211_SKB_CB(skb), tx_time_est: 0);
1168 }
1169
1170 if (!status->info)
1171 goto free;
1172
1173 rates_idx = ieee80211_tx_get_rates(hw, info, retry_count: &retry_count);
1174
1175 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1176 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1177 ack_signal_valid =
1178 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1179
1180 if (pubsta) {
1181 struct ieee80211_sub_if_data *sdata = sta->sdata;
1182
1183 if (!acked && !noack_success)
1184 sta->deflink.status_stats.retry_failed++;
1185 sta->deflink.status_stats.retry_count += retry_count;
1186
1187 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1188 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1189 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1190 ieee80211_sta_tx_notify(sdata, hdr: (void *) skb->data,
1191 ack: acked, tx_time: info->status.tx_time);
1192
1193 if (acked) {
1194 sta->deflink.status_stats.last_ack = jiffies;
1195
1196 if (sta->deflink.status_stats.lost_packets)
1197 sta->deflink.status_stats.lost_packets = 0;
1198
1199 /* Track when last packet was ACKed */
1200 sta->deflink.status_stats.last_pkt_time = jiffies;
1201
1202 /* Reset connection monitor */
1203 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1204 unlikely(sdata->u.mgd.probe_send_count > 0))
1205 sdata->u.mgd.probe_send_count = 0;
1206
1207 if (ack_signal_valid) {
1208 sta->deflink.status_stats.last_ack_signal =
1209 (s8)info->status.ack_signal;
1210 sta->deflink.status_stats.ack_signal_filled = true;
1211 ewma_avg_signal_add(e: &sta->deflink.status_stats.avg_ack_signal,
1212 val: -info->status.ack_signal);
1213 }
1214 } else if (test_sta_flag(sta, flag: WLAN_STA_PS_STA)) {
1215 /*
1216 * The STA is in power save mode, so assume
1217 * that this TX packet failed because of that.
1218 */
1219 if (skb)
1220 ieee80211_handle_filtered_frame(local, sta, skb);
1221 return;
1222 } else if (noack_success) {
1223 /* nothing to do here, do not account as lost */
1224 } else {
1225 ieee80211_lost_packet(sta, info);
1226 }
1227 }
1228
1229 rate_control_tx_status(local, st: status);
1230 if (ieee80211_vif_is_mesh(vif: &sta->sdata->vif))
1231 ieee80211s_update_metric(local, sta, st: status);
1232 }
1233
1234 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1235 return __ieee80211_tx_status(hw, status, rates_idx,
1236 retry_count);
1237
1238 if (acked || noack_success) {
1239 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1240 if (!pubsta)
1241 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1242 if (retry_count > 0)
1243 I802_DEBUG_INC(local->dot11RetryCount);
1244 if (retry_count > 1)
1245 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1246 } else {
1247 I802_DEBUG_INC(local->dot11FailedCount);
1248 }
1249
1250free:
1251 if (!skb)
1252 return;
1253
1254 ieee80211_report_used_skb(local, skb, dropped: false, ack_hwtstamp: status->ack_hwtstamp);
1255 if (status->free_list)
1256 list_add_tail(new: &skb->list, head: status->free_list);
1257 else
1258 dev_kfree_skb(skb);
1259}
1260EXPORT_SYMBOL(ieee80211_tx_status_ext);
1261
1262void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1263 struct ieee80211_sta *pubsta,
1264 struct ieee80211_tx_info *info)
1265{
1266 struct ieee80211_local *local = hw_to_local(hw);
1267 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1268 struct ieee80211_tx_status status = {
1269 .info = info,
1270 .sta = pubsta,
1271 };
1272
1273 rate_control_tx_status(local, st: &status);
1274
1275 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1276 sta->deflink.tx_stats.last_rate = info->status.rates[0];
1277}
1278EXPORT_SYMBOL(ieee80211_tx_rate_update);
1279
1280void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1281{
1282 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1283 cfg80211_cqm_pktloss_notify(dev: sta->sdata->dev, peer: sta->sta.addr,
1284 num_packets, GFP_ATOMIC);
1285}
1286EXPORT_SYMBOL(ieee80211_report_low_ack);
1287
1288void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1289{
1290 struct ieee80211_local *local = hw_to_local(hw);
1291 ktime_t kt = ktime_set(secs: 0, nsecs: 0);
1292
1293 ieee80211_report_used_skb(local, skb, dropped: true, ack_hwtstamp: kt);
1294 dev_kfree_skb_any(skb);
1295}
1296EXPORT_SYMBOL(ieee80211_free_txskb);
1297
1298void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1299 struct sk_buff_head *skbs)
1300{
1301 struct sk_buff *skb;
1302
1303 while ((skb = __skb_dequeue(list: skbs)))
1304 ieee80211_free_txskb(hw, skb);
1305}
1306EXPORT_SYMBOL(ieee80211_purge_tx_queue);
1307