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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 <[email protected]>
6 * Copyright 2008-2010 Johannes Berg <[email protected]>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright 2021-2026 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(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);
37 tmp--;
38 I802_DEBUG_INC(local->tx_status_drop);
39 }
40 tasklet_schedule(&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(&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(&info->control, 0, 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(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, 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, 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);
149
150 if (!timer_pending(&local->sta_cleanup))
151 mod_timer(&local->sta_cleanup,
152 round_jiffies(jiffies +
153 STA_INFO_CLEANUP_INTERVAL));
154 return;
155 }
156
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);
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(&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(&sta->sdata->vif, addr, tid, 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(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, 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, rtap_len);
274
275 memset(rthdr, 0, 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->band < NUM_NL80211_BANDS &&
299 info->status.rates[0].idx >= 0 &&
300 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
301 IEEE80211_TX_RC_VHT_MCS))) {
302 struct ieee80211_supported_band *sband;
303
304 sband = local->hw.wiphy->bands[info->band];
305 legacy_rate =
306 sband->bitrates[info->status.rates[0].idx].bitrate;
307 }
308
309 if (legacy_rate) {
310 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
311 *pos = DIV_ROUND_UP(legacy_rate, 5);
312 /* padding for tx flags */
313 pos += 2;
314 }
315
316 /* IEEE80211_RADIOTAP_TX_FLAGS */
317 txflags = 0;
318 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
319 !is_multicast_ether_addr(hdr->addr1))
320 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
321
322 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
323 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
324 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
325 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
326
327 put_unaligned_le16(txflags, pos);
328 pos += 2;
329
330 /* IEEE80211_RADIOTAP_DATA_RETRIES */
331 /* for now report the total retry_count */
332 *pos = retry_count;
333 pos++;
334
335 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS))
336 {
337 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
338 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
339 IEEE80211_RADIOTAP_MCS_HAVE_GI |
340 IEEE80211_RADIOTAP_MCS_HAVE_BW;
341 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
342 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
343 if (status_rate->rate_idx.bw == RATE_INFO_BW_40)
344 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
345 pos[2] = status_rate->rate_idx.mcs;
346 pos += 3;
347 } else if (status_rate && (status_rate->rate_idx.flags &
348 RATE_INFO_FLAGS_VHT_MCS))
349 {
350 u16 known = local->hw.radiotap_vht_details &
351 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
352 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
353
354 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
355
356 /* required alignment from rthdr */
357 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
358
359 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
360 put_unaligned_le16(known, pos);
361 pos += 2;
362
363 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
364 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
365 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
366 pos++;
367
368 /* u8 bandwidth */
369 switch (status_rate->rate_idx.bw) {
370 case RATE_INFO_BW_160:
371 *pos = 11;
372 break;
373 case RATE_INFO_BW_80:
374 *pos = 4;
375 break;
376 case RATE_INFO_BW_40:
377 *pos = 1;
378 break;
379 default:
380 *pos = 0;
381 break;
382 }
383 pos++;
384
385 /* u8 mcs_nss[4] */
386 *pos = (status_rate->rate_idx.mcs << 4) |
387 status_rate->rate_idx.nss;
388 pos += 4;
389
390 /* u8 coding */
391 pos++;
392 /* u8 group_id */
393 pos++;
394 /* u16 partial_aid */
395 pos += 2;
396 } else if (status_rate && (status_rate->rate_idx.flags &
397 RATE_INFO_FLAGS_HE_MCS))
398 {
399 struct ieee80211_radiotap_he *he;
400
401 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE));
402
403 /* required alignment from rthdr */
404 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
405 he = (struct ieee80211_radiotap_he *)pos;
406
407 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
408 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
409 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
410 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
411
412 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
413
414#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
415
416 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss);
417
418#define CHECK_GI(s) \
419 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
420 (int)NL80211_RATE_INFO_HE_GI_##s)
421
422 CHECK_GI(0_8);
423 CHECK_GI(1_6);
424 CHECK_GI(3_2);
425
426 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs);
427 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm);
428
429 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi);
430
431 switch (status_rate->rate_idx.bw) {
432 case RATE_INFO_BW_20:
433 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
434 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
435 break;
436 case RATE_INFO_BW_40:
437 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
438 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
439 break;
440 case RATE_INFO_BW_80:
441 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
442 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
443 break;
444 case RATE_INFO_BW_160:
445 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
446 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
447 break;
448 case RATE_INFO_BW_HE_RU:
449#define CHECK_RU_ALLOC(s) \
450 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
451 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
452
453 CHECK_RU_ALLOC(26);
454 CHECK_RU_ALLOC(52);
455 CHECK_RU_ALLOC(106);
456 CHECK_RU_ALLOC(242);
457 CHECK_RU_ALLOC(484);
458 CHECK_RU_ALLOC(996);
459 CHECK_RU_ALLOC(2x996);
460
461 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
462 status_rate->rate_idx.he_ru_alloc + 4);
463 break;
464 default:
465 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw);
466 }
467
468 pos += sizeof(struct ieee80211_radiotap_he);
469 }
470
471 if (status_rate || info->status.rates[0].idx < 0)
472 return;
473
474 /* IEEE80211_RADIOTAP_MCS
475 * IEEE80211_RADIOTAP_VHT */
476 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
477 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
478 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
479 IEEE80211_RADIOTAP_MCS_HAVE_GI |
480 IEEE80211_RADIOTAP_MCS_HAVE_BW;
481 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
482 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
483 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
484 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
485 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
486 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
487 pos[2] = info->status.rates[0].idx;
488 pos += 3;
489 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
490 u16 known = local->hw.radiotap_vht_details &
491 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
492 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
493
494 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
495
496 /* required alignment from rthdr */
497 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
498
499 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
500 put_unaligned_le16(known, pos);
501 pos += 2;
502
503 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
504 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
505 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
506 pos++;
507
508 /* u8 bandwidth */
509 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
510 *pos = 1;
511 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
512 *pos = 4;
513 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
514 *pos = 11;
515 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
516 *pos = 0;
517 pos++;
518
519 /* u8 mcs_nss[4] */
520 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
521 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
522 pos += 4;
523
524 /* u8 coding */
525 pos++;
526 /* u8 group_id */
527 pos++;
528 /* u16 partial_aid */
529 pos += 2;
530 }
531}
532
533/*
534 * Handles the tx for TDLS teardown frames.
535 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
536 */
537static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
538 struct ieee80211_sub_if_data *sdata,
539 struct sk_buff *skb, u32 flags)
540{
541 struct sk_buff *teardown_skb;
542 struct sk_buff *orig_teardown_skb;
543 bool is_teardown = false;
544
545 /* Get the teardown data we need and free the lock */
546 spin_lock(&sdata->u.mgd.teardown_lock);
547 teardown_skb = sdata->u.mgd.teardown_skb;
548 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
549 if ((skb == orig_teardown_skb) && teardown_skb) {
550 sdata->u.mgd.teardown_skb = NULL;
551 sdata->u.mgd.orig_teardown_skb = NULL;
552 is_teardown = true;
553 }
554 spin_unlock(&sdata->u.mgd.teardown_lock);
555
556 if (is_teardown) {
557 /* This mechanism relies on being able to get ACKs */
558 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
559
560 /* Check if peer has ACKed */
561 if (flags & IEEE80211_TX_STAT_ACK) {
562 dev_kfree_skb_any(teardown_skb);
563 } else {
564 tdls_dbg(sdata,
565 "TDLS Resending teardown through AP\n");
566
567 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
568 }
569 }
570}
571
572static struct ieee80211_sub_if_data *
573ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
574{
575 struct ieee80211_sub_if_data *sdata;
576 struct ieee80211_hdr *hdr = (void *)skb->data;
577
578 if (skb->dev) {
579 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
580 if (!sdata->dev)
581 continue;
582
583 if (skb->dev == sdata->dev)
584 return sdata;
585 }
586
587 return NULL;
588 }
589
590 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
591 switch (sdata->vif.type) {
592 case NL80211_IFTYPE_P2P_DEVICE:
593 break;
594 case NL80211_IFTYPE_NAN:
595 if (sdata->u.nan.started)
596 break;
597 fallthrough;
598 default:
599 continue;
600 }
601
602 if (ether_addr_equal(sdata->vif.addr, hdr->addr2))
603 return sdata;
604 }
605
606 return NULL;
607}
608
609static void ieee80211_report_ack_skb(struct ieee80211_local *local,
610 struct sk_buff *orig_skb,
611 bool acked, bool dropped,
612 ktime_t ack_hwtstamp)
613{
614 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb);
615 struct sk_buff *skb;
616 unsigned long flags;
617
618 spin_lock_irqsave(&local->ack_status_lock, flags);
619 skb = idr_remove(&local->ack_status_frames, info->status_data);
620 spin_unlock_irqrestore(&local->ack_status_lock, flags);
621
622 if (!skb)
623 return;
624
625 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
626 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
627 struct ieee80211_sub_if_data *sdata;
628 struct ieee80211_hdr *hdr = (void *)skb->data;
629 bool is_valid_ack_signal =
630 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
631 struct cfg80211_tx_status status = {
632 .cookie = cookie,
633 .buf = skb->data,
634 .len = skb->len,
635 .ack = acked,
636 };
637
638 if (ieee80211_is_timing_measurement(orig_skb) ||
639 ieee80211_is_ftm(orig_skb)) {
640 status.tx_tstamp =
641 ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp);
642 status.ack_tstamp = ktime_to_ns(ack_hwtstamp);
643 }
644
645 rcu_read_lock();
646 sdata = ieee80211_sdata_from_skb(local, skb);
647 if (sdata) {
648 if (skb->protocol == sdata->control_port_protocol ||
649 skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
650 cfg80211_control_port_tx_status(&sdata->wdev,
651 cookie,
652 skb->data,
653 skb->len,
654 acked,
655 GFP_ATOMIC);
656 else if (ieee80211_is_any_nullfunc(hdr->frame_control))
657 cfg80211_probe_status(sdata->dev, hdr->addr1,
658 cookie,
659 info->status.link_valid ?
660 info->status.link_id : -1,
661 acked,
662 info->status.ack_signal,
663 is_valid_ack_signal,
664 GFP_ATOMIC);
665 else if (ieee80211_is_mgmt(hdr->frame_control))
666 cfg80211_mgmt_tx_status_ext(&sdata->wdev,
667 &status,
668 GFP_ATOMIC);
669 else
670 pr_warn("Unknown status report in ack skb\n");
671
672 }
673 rcu_read_unlock();
674
675 dev_kfree_skb_any(skb);
676 } else if (dropped) {
677 dev_kfree_skb_any(skb);
678 } else {
679 /* consumes skb */
680 skb_complete_wifi_ack(skb, acked);
681 }
682}
683
684static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata,
685 bool acked, u16 status_data)
686{
687 u16 sub_data = u16_get_bits(status_data, IEEE80211_STATUS_SUBDATA_MASK);
688 enum ieee80211_smps_mode smps_mode = sub_data & 3;
689 int link_id = (sub_data >> 2);
690 struct ieee80211_link_data *link;
691
692 if (!sdata || !ieee80211_sdata_running(sdata))
693 return;
694
695 if (!acked)
696 return;
697
698 if (sdata->vif.type != NL80211_IFTYPE_STATION)
699 return;
700
701 if (WARN(link_id >= ARRAY_SIZE(sdata->link),
702 "bad SMPS status link: %d\n", link_id))
703 return;
704
705 link = rcu_dereference(sdata->link[link_id]);
706 if (!link)
707 return;
708
709 /*
710 * This update looks racy, but isn't, the only other place
711 * updating this variable is in managed mode before assoc,
712 * and we have to be associated to have a status from the
713 * action frame TX, since we cannot send it while we're not
714 * associated yet.
715 */
716 link->smps_mode = smps_mode;
717 wiphy_work_queue(sdata->local->hw.wiphy, &link->u.mgd.recalc_smps);
718}
719
720static void
721ieee80211_handle_teardown_ttlm_status(struct ieee80211_sub_if_data *sdata,
722 bool acked)
723{
724 if (!sdata || !ieee80211_sdata_running(sdata))
725 return;
726
727 if (!acked)
728 return;
729
730 if (sdata->vif.type != NL80211_IFTYPE_STATION)
731 return;
732
733 wiphy_work_queue(sdata->local->hw.wiphy,
734 &sdata->u.mgd.teardown_ttlm_work);
735}
736
737static void
738ieee80211_handle_uhr_omp_status(struct ieee80211_sub_if_data *sdata, bool acked)
739{
740 if (!sdata || !ieee80211_sdata_running(sdata))
741 return;
742
743 if (sdata->vif.type != NL80211_IFTYPE_STATION)
744 return;
745
746 sdata->u.mgd.uhr_omp.acked = acked;
747
748 if (!acked) {
749 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy,
750 &sdata->u.mgd.uhr_omp.status_work, 0);
751 return;
752 }
753
754 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy,
755 &sdata->u.mgd.uhr_omp.status_work,
756 us_to_ktime(sdata->u.mgd.uhr_omp.timeout_us));
757}
758
759static void ieee80211_report_used_skb(struct ieee80211_local *local,
760 struct sk_buff *skb, bool dropped,
761 ktime_t ack_hwtstamp)
762{
763 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
764 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
765 struct ieee80211_hdr *hdr = (void *)skb->data;
766 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
767
768 if (dropped)
769 acked = false;
770
771 if (tx_time_est) {
772 struct sta_info *sta;
773
774 rcu_read_lock();
775
776 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
777 ieee80211_sta_update_pending_airtime(local, sta,
778 skb_get_queue_mapping(skb),
779 tx_time_est,
780 true, info->tx_time_mc);
781 rcu_read_unlock();
782 }
783
784 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
785 struct ieee80211_sub_if_data *sdata;
786
787 rcu_read_lock();
788
789 sdata = ieee80211_sdata_from_skb(local, skb);
790
791 if (!sdata) {
792 skb->dev = NULL;
793 } else if (!dropped) {
794 /* Check to see if packet is a TDLS teardown packet */
795 if (ieee80211_is_data(hdr->frame_control) &&
796 (ieee80211_get_tdls_action(skb) ==
797 WLAN_TDLS_TEARDOWN)) {
798 ieee80211_tdls_td_tx_handle(local, sdata, skb,
799 info->flags);
800 } else if (ieee80211_s1g_is_twt_setup(skb)) {
801 if (!acked) {
802 struct sk_buff *qskb;
803
804 qskb = skb_clone(skb, GFP_ATOMIC);
805 if (qskb) {
806 skb_queue_tail(&sdata->status_queue,
807 qskb);
808 wiphy_work_queue(local->hw.wiphy,
809 &sdata->work);
810 }
811 }
812 } else {
813 ieee80211_mgd_conn_tx_status(sdata,
814 hdr->frame_control,
815 acked);
816 }
817 }
818
819 rcu_read_unlock();
820 } else if (info->status_data_idr) {
821 ieee80211_report_ack_skb(local, skb, acked, dropped,
822 ack_hwtstamp);
823 } else if (info->status_data) {
824 struct ieee80211_sub_if_data *sdata;
825
826 rcu_read_lock();
827
828 sdata = ieee80211_sdata_from_skb(local, skb);
829
830 switch (u16_get_bits(info->status_data,
831 IEEE80211_STATUS_TYPE_MASK)) {
832 case IEEE80211_STATUS_TYPE_SMPS:
833 ieee80211_handle_smps_status(sdata, acked,
834 info->status_data);
835 break;
836 case IEEE80211_STATUS_TYPE_NEG_TTLM:
837 ieee80211_handle_teardown_ttlm_status(sdata, acked);
838 break;
839 case IEEE80211_STATUS_TYPE_UHR_OMP:
840 ieee80211_handle_uhr_omp_status(sdata, acked);
841 break;
842 }
843 rcu_read_unlock();
844 }
845
846 if (!dropped && skb->destructor) {
847 skb->wifi_acked_valid = 1;
848 skb->wifi_acked = acked;
849 }
850
851 ieee80211_led_tx(local);
852
853 if (skb_has_frag_list(skb)) {
854 kfree_skb_list(skb_shinfo(skb)->frag_list);
855 skb_shinfo(skb)->frag_list = NULL;
856 }
857}
858
859/*
860 * Use a static threshold for now, best value to be determined
861 * by testing ...
862 * Should it depend on:
863 * - on # of retransmissions
864 * - current throughput (higher value for higher tpt)?
865 */
866#define STA_LOST_PKT_THRESHOLD 50
867#define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
868#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
869
870static void ieee80211_lost_packet(struct sta_info *sta,
871 struct ieee80211_tx_info *info)
872{
873 unsigned long pkt_time = STA_LOST_PKT_TIME;
874 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
875
876 /* If driver relies on its own algorithm for station kickout, skip
877 * mac80211 packet loss mechanism.
878 */
879 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
880 return;
881
882 /* This packet was aggregated but doesn't carry status info */
883 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
884 !(info->flags & IEEE80211_TX_STAT_AMPDU))
885 return;
886
887 sta->deflink.status_stats.lost_packets++;
888 if (sta->sta.tdls) {
889 pkt_time = STA_LOST_TDLS_PKT_TIME;
890 pkt_thr = STA_LOST_PKT_THRESHOLD;
891 }
892
893 /*
894 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
895 * of the last packets were lost, and that no ACK was received in the
896 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
897 * mechanism.
898 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
899 */
900 if (sta->deflink.status_stats.lost_packets < pkt_thr ||
901 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time))
902 return;
903
904 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
905 sta->deflink.status_stats.lost_packets,
906 GFP_ATOMIC);
907 sta->deflink.status_stats.lost_packets = 0;
908}
909
910static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
911 struct ieee80211_tx_info *info,
912 int *retry_count)
913{
914 int count = -1;
915 int i;
916
917 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
918 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
919 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
920 /* just the first aggr frame carry status info */
921 info->status.rates[i].idx = -1;
922 info->status.rates[i].count = 0;
923 break;
924 } else if (info->status.rates[i].idx < 0) {
925 break;
926 } else if (i >= hw->max_report_rates) {
927 /* the HW cannot have attempted that rate */
928 info->status.rates[i].idx = -1;
929 info->status.rates[i].count = 0;
930 break;
931 }
932
933 count += info->status.rates[i].count;
934 }
935
936 if (count < 0)
937 count = 0;
938
939 *retry_count = count;
940 return i - 1;
941}
942
943void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
944 int retry_count, struct ieee80211_tx_status *status)
945{
946 struct sk_buff *skb2;
947 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
948 struct ieee80211_sub_if_data *sdata;
949 struct net_device *prev_dev = NULL;
950 int rtap_len;
951
952 /* send frame to monitor interfaces now */
953 rtap_len = ieee80211_tx_radiotap_len(info, status);
954 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
955 pr_err("ieee80211_tx_status: headroom too small\n");
956 dev_kfree_skb(skb);
957 return;
958 }
959 ieee80211_add_tx_radiotap_header(local, skb, retry_count,
960 rtap_len, status);
961
962 /* XXX: is this sufficient for BPF? */
963 skb_reset_mac_header(skb);
964 skb->ip_summed = CHECKSUM_UNNECESSARY;
965 skb->pkt_type = PACKET_OTHERHOST;
966 skb->protocol = htons(ETH_P_802_2);
967 memset(skb->cb, 0, sizeof(skb->cb));
968
969 rcu_read_lock();
970 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
971 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
972 if (!ieee80211_sdata_running(sdata))
973 continue;
974
975 if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX)
976 continue;
977
978 if (prev_dev) {
979 skb2 = skb_clone(skb, GFP_ATOMIC);
980 if (skb2) {
981 skb2->dev = prev_dev;
982 netif_rx(skb2);
983 }
984 }
985
986 prev_dev = sdata->dev;
987 }
988 }
989 if (prev_dev) {
990 skb->dev = prev_dev;
991 netif_rx(skb);
992 skb = NULL;
993 }
994 rcu_read_unlock();
995 dev_kfree_skb(skb);
996}
997
998static void __ieee80211_tx_status(struct ieee80211_hw *hw,
999 struct ieee80211_tx_status *status,
1000 int rates_idx, int retry_count)
1001{
1002 struct sk_buff *skb = status->skb;
1003 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1004 struct ieee80211_local *local = hw_to_local(hw);
1005 struct ieee80211_tx_info *info = status->info;
1006 struct sta_info *sta;
1007 __le16 fc;
1008 bool acked;
1009 bool noack_success;
1010 struct ieee80211_bar *bar;
1011 int tid = IEEE80211_NUM_TIDS;
1012
1013 fc = hdr->frame_control;
1014
1015 if (status->sta) {
1016 sta = container_of(status->sta, struct sta_info, sta);
1017
1018 if (info->flags & IEEE80211_TX_STATUS_EOSP)
1019 clear_sta_flag(sta, WLAN_STA_SP);
1020
1021 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1022 noack_success = !!(info->flags &
1023 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1024
1025 /* mesh Peer Service Period support */
1026 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
1027 ieee80211_is_data_qos(fc))
1028 ieee80211_mpsp_trigger_process(
1029 ieee80211_get_qos_ctl(hdr), sta, true, acked);
1030
1031 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
1032 (ieee80211_is_data(hdr->frame_control)) &&
1033 (rates_idx != -1))
1034 sta->deflink.tx_stats.last_rate =
1035 info->status.rates[rates_idx];
1036
1037 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1038 (ieee80211_is_data_qos(fc))) {
1039 u16 ssn;
1040 u8 *qc;
1041
1042 qc = ieee80211_get_qos_ctl(hdr);
1043 tid = qc[0] & 0xf;
1044 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1045 & IEEE80211_SCTL_SEQ);
1046 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
1047 tid, ssn);
1048 } else if (ieee80211_is_data_qos(fc)) {
1049 u8 *qc = ieee80211_get_qos_ctl(hdr);
1050
1051 tid = qc[0] & 0xf;
1052 }
1053
1054 if (!acked && ieee80211_is_back_req(fc)) {
1055 u16 control;
1056
1057 /*
1058 * BAR failed, store the last SSN and retry sending
1059 * the BAR when the next unicast transmission on the
1060 * same TID succeeds.
1061 */
1062 bar = (struct ieee80211_bar *) skb->data;
1063 control = le16_to_cpu(bar->control);
1064 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
1065 u16 ssn = le16_to_cpu(bar->start_seq_num);
1066
1067 tid = (control &
1068 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
1069 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
1070
1071 ieee80211_set_bar_pending(sta, tid, ssn);
1072 }
1073 }
1074
1075 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1076 ieee80211_handle_filtered_frame(local, sta, skb);
1077 return;
1078 } else if (ieee80211_is_data_present(fc)) {
1079 if (!acked && !noack_success)
1080 sta->deflink.status_stats.msdu_failed[tid]++;
1081
1082 sta->deflink.status_stats.msdu_retries[tid] +=
1083 retry_count;
1084 }
1085
1086 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
1087 ieee80211_frame_acked(sta, skb);
1088
1089 }
1090
1091 /* SNMP counters
1092 * Fragments are passed to low-level drivers as separate skbs, so these
1093 * are actually fragments, not frames. Update frame counters only for
1094 * the first fragment of the frame. */
1095 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1096 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1097 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1098 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1099 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1100 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1101 if (retry_count > 0)
1102 I802_DEBUG_INC(local->dot11RetryCount);
1103 if (retry_count > 1)
1104 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1105 }
1106
1107 /* This counter shall be incremented for an acknowledged MPDU
1108 * with an individual address in the address 1 field or an MPDU
1109 * with a multicast address in the address 1 field of type Data
1110 * or Management. */
1111 if (!is_multicast_ether_addr(hdr->addr1) ||
1112 ieee80211_is_data(fc) ||
1113 ieee80211_is_mgmt(fc))
1114 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1115 } else {
1116 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1117 I802_DEBUG_INC(local->dot11FailedCount);
1118 }
1119
1120 if (ieee80211_is_any_nullfunc(fc) &&
1121 ieee80211_has_pm(fc) &&
1122 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1123 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1124 local->ps_sdata && !(local->scanning)) {
1125 if (info->flags & IEEE80211_TX_STAT_ACK)
1126 local->ps_sdata->u.mgd.flags |=
1127 IEEE80211_STA_NULLFUNC_ACKED;
1128 mod_timer(&local->dynamic_ps_timer,
1129 jiffies + msecs_to_jiffies(10));
1130 }
1131
1132 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1133
1134 /*
1135 * This is a bit racy but we can avoid a lot of work
1136 * with this test...
1137 */
1138 if (local->tx_mntrs)
1139 ieee80211_tx_monitor(local, skb, retry_count, status);
1140 else if (status->free_list)
1141 list_add_tail(&skb->list, status->free_list);
1142 else
1143 dev_kfree_skb(skb);
1144}
1145
1146void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb)
1147{
1148 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1149 struct ieee80211_local *local = hw_to_local(hw);
1150 struct ieee80211_tx_status status = {
1151 .skb = skb,
1152 .info = IEEE80211_SKB_CB(skb),
1153 };
1154 struct sta_info *sta;
1155
1156 rcu_read_lock();
1157
1158 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1159 if (sta)
1160 status.sta = &sta->sta;
1161
1162 ieee80211_tx_status_ext(hw, &status);
1163 rcu_read_unlock();
1164}
1165EXPORT_SYMBOL(ieee80211_tx_status_skb);
1166
1167/*
1168 * Check whether the HT/VHT rate information in a TX status entry is
1169 * valid for its encoding. This is not specific to any rate control
1170 * algorithm; all status consumers rely on the values being sane.
1171 */
1172static bool ieee80211_tx_status_rate_info_valid(const struct rate_info *rate)
1173{
1174 if (rate->flags & RATE_INFO_FLAGS_MCS)
1175 return rate->mcs < 32;
1176
1177 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1178 return rate->nss >= 1 && rate->nss <= 8 && rate->mcs <= 11;
1179
1180 return true;
1181}
1182
1183static bool
1184ieee80211_tx_status_tx_rate_valid(const struct ieee80211_tx_rate *rate)
1185{
1186 if (rate->flags & IEEE80211_TX_RC_MCS)
1187 return rate->idx < 32;
1188
1189 if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
1190 return ieee80211_rate_get_vht_mcs(rate) <= 11;
1191
1192 return true;
1193}
1194
1195/*
1196 * Drop TX status rate entries that don't describe a valid rate. The
1197 * status information is used by rate control and by other mac80211
1198 * code, and a malformed entry must not be able to corrupt state beyond
1199 * the driver that reported it.
1200 */
1201static void
1202ieee80211_tx_status_drop_invalid_rates(struct ieee80211_tx_status *status)
1203{
1204 int i;
1205
1206 for (i = 0; i < status->n_rates; i++) {
1207 struct ieee80211_rate_status *rs = &status->rates[i];
1208
1209 if (ieee80211_tx_status_rate_info_valid(&rs->rate_idx))
1210 continue;
1211
1212 rs->try_count = 0;
1213 memset(&rs->rate_idx, 0, sizeof(rs->rate_idx));
1214 }
1215
1216 if (!status->info)
1217 return;
1218
1219 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1220 struct ieee80211_tx_rate *rate;
1221
1222 rate = &status->info->status.rates[i];
1223 if (rate->idx < 0)
1224 break;
1225
1226 if (ieee80211_tx_status_tx_rate_valid(rate))
1227 continue;
1228
1229 rate->idx = -1;
1230 rate->count = 0;
1231 }
1232}
1233
1234void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1235 struct ieee80211_tx_status *status)
1236{
1237 struct ieee80211_local *local = hw_to_local(hw);
1238 struct ieee80211_tx_info *info = status->info;
1239 struct ieee80211_sta *pubsta = status->sta;
1240 struct sk_buff *skb = status->skb;
1241 struct sta_info *sta = NULL;
1242 int rates_idx, retry_count;
1243 bool acked, noack_success, ack_signal_valid;
1244 u16 tx_time_est;
1245
1246 ieee80211_tx_status_drop_invalid_rates(status);
1247
1248 if (pubsta) {
1249 sta = container_of(pubsta, struct sta_info, sta);
1250
1251 if (status->n_rates)
1252 sta->deflink.tx_stats.last_rate_info =
1253 status->rates[status->n_rates - 1].rate_idx;
1254 }
1255
1256 if (skb && (tx_time_est =
1257 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1258 /* Do this here to avoid the expensive lookup of the sta
1259 * in ieee80211_report_used_skb().
1260 */
1261 bool mcast = IEEE80211_SKB_CB(skb)->tx_time_mc;
1262 ieee80211_sta_update_pending_airtime(local, sta,
1263 skb_get_queue_mapping(skb),
1264 tx_time_est,
1265 true, mcast);
1266 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1267 }
1268
1269 if (!status->info)
1270 goto free;
1271
1272 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1273
1274 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1275 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1276 ack_signal_valid =
1277 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1278
1279 if (pubsta) {
1280 struct ieee80211_sub_if_data *sdata = sta->sdata;
1281
1282 if (!acked && !noack_success)
1283 sta->deflink.status_stats.retry_failed++;
1284 sta->deflink.status_stats.retry_count += retry_count;
1285
1286 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1287 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1288 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1289 ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1290 acked, info->status.tx_time);
1291
1292 if (acked) {
1293 sta->deflink.status_stats.last_ack = jiffies;
1294
1295 if (sta->deflink.status_stats.lost_packets)
1296 sta->deflink.status_stats.lost_packets = 0;
1297
1298 /* Track when last packet was ACKed */
1299 sta->deflink.status_stats.last_pkt_time = jiffies;
1300
1301 /* Reset connection monitor */
1302 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1303 unlikely(sdata->u.mgd.probe_send_count > 0))
1304 sdata->u.mgd.probe_send_count = 0;
1305
1306 if (ack_signal_valid) {
1307 sta->deflink.status_stats.last_ack_signal =
1308 (s8)info->status.ack_signal;
1309 sta->deflink.status_stats.ack_signal_filled = true;
1310 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal,
1311 -info->status.ack_signal);
1312 }
1313 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1314 /*
1315 * The STA is in power save mode, so assume
1316 * that this TX packet failed because of that.
1317 */
1318 if (skb)
1319 ieee80211_handle_filtered_frame(local, sta, skb);
1320 return;
1321 } else if (noack_success) {
1322 /* nothing to do here, do not account as lost */
1323 } else {
1324 ieee80211_lost_packet(sta, info);
1325 }
1326 }
1327
1328 rate_control_tx_status(local, status);
1329 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1330 ieee80211s_update_metric(local, sta, status);
1331 }
1332
1333 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1334 return __ieee80211_tx_status(hw, status, rates_idx,
1335 retry_count);
1336
1337 if (acked || noack_success) {
1338 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1339 if (!pubsta)
1340 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1341 if (retry_count > 0)
1342 I802_DEBUG_INC(local->dot11RetryCount);
1343 if (retry_count > 1)
1344 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1345 } else {
1346 I802_DEBUG_INC(local->dot11FailedCount);
1347 }
1348
1349free:
1350 if (!skb)
1351 return;
1352
1353 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1354 if (status->free_list)
1355 list_add_tail(&skb->list, status->free_list);
1356 else
1357 dev_kfree_skb(skb);
1358}
1359EXPORT_SYMBOL(ieee80211_tx_status_ext);
1360
1361void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1362 struct ieee80211_sta *pubsta,
1363 struct ieee80211_tx_info *info)
1364{
1365 struct ieee80211_local *local = hw_to_local(hw);
1366 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1367 struct ieee80211_tx_status status = {
1368 .info = info,
1369 .sta = pubsta,
1370 };
1371
1372 ieee80211_tx_status_drop_invalid_rates(&status);
1373 rate_control_tx_status(local, &status);
1374
1375 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1376 sta->deflink.tx_stats.last_rate = info->status.rates[0];
1377}
1378EXPORT_SYMBOL(ieee80211_tx_rate_update);
1379
1380void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1381{
1382 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1383 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1384 num_packets, GFP_ATOMIC);
1385}
1386EXPORT_SYMBOL(ieee80211_report_low_ack);
1387
1388void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1389{
1390 struct ieee80211_local *local = hw_to_local(hw);
1391 ktime_t kt = ktime_set(0, 0);
1392
1393 ieee80211_report_used_skb(local, skb, true, kt);
1394 dev_kfree_skb_any(skb);
1395}
1396EXPORT_SYMBOL(ieee80211_free_txskb);
1397
1398void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1399 struct sk_buff_head *skbs)
1400{
1401 struct sk_buff *skb;
1402
1403 while ((skb = __skb_dequeue(skbs)))
1404 ieee80211_free_txskb(hw, skb);
1405}
1406EXPORT_SYMBOL(ieee80211_purge_tx_queue);