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Linux 5.7.7
[linux/fpc-iii.git] / net / mac80211 / status.c
blob22512805eafb724edef1e845dd91fd3596cddbe9
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 */
9
10 #include <linux/export.h>
11 #include <linux/etherdevice.h>
12 #include <net/mac80211.h>
13 #include <asm/unaligned.h>
14 #include "ieee80211_i.h"
15 #include "rate.h"
16 #include "mesh.h"
17 #include "led.h"
18 #include "wme.h"
19
20
21 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
22 struct sk_buff *skb)
23 {
24 struct ieee80211_local *local = hw_to_local(hw);
25 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
26 int tmp;
27
28 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
29 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
30 &local->skb_queue : &local->skb_queue_unreliable, skb);
31 tmp = skb_queue_len(&local->skb_queue) +
32 skb_queue_len(&local->skb_queue_unreliable);
33 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
34 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
35 ieee80211_free_txskb(hw, skb);
36 tmp--;
37 I802_DEBUG_INC(local->tx_status_drop);
38 }
39 tasklet_schedule(&local->tasklet);
40 }
41 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
42
43 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
44 struct sta_info *sta,
45 struct sk_buff *skb)
46 {
47 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
48 struct ieee80211_hdr *hdr = (void *)skb->data;
49 int ac;
50
51 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
52 IEEE80211_TX_CTL_AMPDU)) {
53 ieee80211_free_txskb(&local->hw, skb);
54 return;
55 }
56
57 /*
58 * This skb 'survived' a round-trip through the driver, and
59 * hopefully the driver didn't mangle it too badly. However,
60 * we can definitely not rely on the control information
61 * being correct. Clear it so we don't get junk there, and
62 * indicate that it needs new processing, but must not be
63 * modified/encrypted again.
64 */
65 memset(&info->control, 0, sizeof(info->control));
66
67 info->control.jiffies = jiffies;
68 info->control.vif = &sta->sdata->vif;
69 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
70 IEEE80211_TX_INTFL_RETRANSMISSION;
71 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
72
73 sta->status_stats.filtered++;
74
75 /*
76 * Clear more-data bit on filtered frames, it might be set
77 * but later frames might time out so it might have to be
78 * clear again ... It's all rather unlikely (this frame
79 * should time out first, right?) but let's not confuse
80 * peers unnecessarily.
81 */
82 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
83 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
84
85 if (ieee80211_is_data_qos(hdr->frame_control)) {
86 u8 *p = ieee80211_get_qos_ctl(hdr);
87 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
88
89 /*
90 * Clear EOSP if set, this could happen e.g.
91 * if an absence period (us being a P2P GO)
92 * shortens the SP.
93 */
94 if (*p & IEEE80211_QOS_CTL_EOSP)
95 *p &= ~IEEE80211_QOS_CTL_EOSP;
96 ac = ieee80211_ac_from_tid(tid);
97 } else {
98 ac = IEEE80211_AC_BE;
99 }
100
101 /*
102 * Clear the TX filter mask for this STA when sending the next
103 * packet. If the STA went to power save mode, this will happen
104 * when it wakes up for the next time.
105 */
106 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
107 ieee80211_clear_fast_xmit(sta);
108
109 /*
110 * This code races in the following way:
111 *
112 * (1) STA sends frame indicating it will go to sleep and does so
113 * (2) hardware/firmware adds STA to filter list, passes frame up
114 * (3) hardware/firmware processes TX fifo and suppresses a frame
115 * (4) we get TX status before having processed the frame and
116 * knowing that the STA has gone to sleep.
117 *
118 * This is actually quite unlikely even when both those events are
119 * processed from interrupts coming in quickly after one another or
120 * even at the same time because we queue both TX status events and
121 * RX frames to be processed by a tasklet and process them in the
122 * same order that they were received or TX status last. Hence, there
123 * is no race as long as the frame RX is processed before the next TX
124 * status, which drivers can ensure, see below.
125 *
126 * Note that this can only happen if the hardware or firmware can
127 * actually add STAs to the filter list, if this is done by the
128 * driver in response to set_tim() (which will only reduce the race
129 * this whole filtering tries to solve, not completely solve it)
130 * this situation cannot happen.
131 *
132 * To completely solve this race drivers need to make sure that they
133 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
134 * functions and
135 * (b) always process RX events before TX status events if ordering
136 * can be unknown, for example with different interrupt status
137 * bits.
138 * (c) if PS mode transitions are manual (i.e. the flag
139 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
140 * changes before calling TX status events if ordering can be
141 * unknown.
142 */
143 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
144 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
145 skb_queue_tail(&sta->tx_filtered[ac], skb);
146 sta_info_recalc_tim(sta);
147
148 if (!timer_pending(&local->sta_cleanup))
149 mod_timer(&local->sta_cleanup,
150 round_jiffies(jiffies +
151 STA_INFO_CLEANUP_INTERVAL));
152 return;
153 }
154
155 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
156 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
157 /* Software retry the packet once */
158 info->flags |= IEEE80211_TX_INTFL_RETRIED;
159 ieee80211_add_pending_skb(local, skb);
160 return;
161 }
162
163 ps_dbg_ratelimited(sta->sdata,
164 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
165 skb_queue_len(&sta->tx_filtered[ac]),
166 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
167 ieee80211_free_txskb(&local->hw, skb);
168 }
169
170 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
171 {
172 struct tid_ampdu_tx *tid_tx;
173
174 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
175 if (!tid_tx || !tid_tx->bar_pending)
176 return;
177
178 tid_tx->bar_pending = false;
179 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
180 }
181
182 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
183 {
184 struct ieee80211_mgmt *mgmt = (void *) skb->data;
185 struct ieee80211_local *local = sta->local;
186 struct ieee80211_sub_if_data *sdata = sta->sdata;
187 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
188
189 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
190 sta->status_stats.last_ack = jiffies;
191 if (txinfo->status.is_valid_ack_signal) {
192 sta->status_stats.last_ack_signal =
193 (s8)txinfo->status.ack_signal;
194 sta->status_stats.ack_signal_filled = true;
195 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
196 -txinfo->status.ack_signal);
197 }
198 }
199
200 if (ieee80211_is_data_qos(mgmt->frame_control)) {
201 struct ieee80211_hdr *hdr = (void *) skb->data;
202 u8 *qc = ieee80211_get_qos_ctl(hdr);
203 u16 tid = qc[0] & 0xf;
204
205 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
206 }
207
208 if (ieee80211_is_action(mgmt->frame_control) &&
209 !ieee80211_has_protected(mgmt->frame_control) &&
210 mgmt->u.action.category == WLAN_CATEGORY_HT &&
211 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
212 ieee80211_sdata_running(sdata)) {
213 enum ieee80211_smps_mode smps_mode;
214
215 switch (mgmt->u.action.u.ht_smps.smps_control) {
216 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
217 smps_mode = IEEE80211_SMPS_DYNAMIC;
218 break;
219 case WLAN_HT_SMPS_CONTROL_STATIC:
220 smps_mode = IEEE80211_SMPS_STATIC;
221 break;
222 case WLAN_HT_SMPS_CONTROL_DISABLED:
223 default: /* shouldn't happen since we don't send that */
224 smps_mode = IEEE80211_SMPS_OFF;
225 break;
226 }
227
228 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
229 /*
230 * This update looks racy, but isn't -- if we come
231 * here we've definitely got a station that we're
232 * talking to, and on a managed interface that can
233 * only be the AP. And the only other place updating
234 * this variable in managed mode is before association.
235 */
236 sdata->smps_mode = smps_mode;
237 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
238 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
239 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
240 sta->known_smps_mode = smps_mode;
241 }
242 }
243 }
244
245 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
246 {
247 struct tid_ampdu_tx *tid_tx;
248
249 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
250 if (!tid_tx)
251 return;
252
253 tid_tx->failed_bar_ssn = ssn;
254 tid_tx->bar_pending = true;
255 }
256
257 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
258 struct ieee80211_tx_status *status)
259 {
260 int len = sizeof(struct ieee80211_radiotap_header);
261
262 /* IEEE80211_RADIOTAP_RATE rate */
263 if (status && status->rate && !(status->rate->flags &
264 (RATE_INFO_FLAGS_MCS |
265 RATE_INFO_FLAGS_DMG |
266 RATE_INFO_FLAGS_EDMG |
267 RATE_INFO_FLAGS_VHT_MCS |
268 RATE_INFO_FLAGS_HE_MCS)))
269 len += 2;
270 else if (info->status.rates[0].idx >= 0 &&
271 !(info->status.rates[0].flags &
272 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
273 len += 2;
274
275 /* IEEE80211_RADIOTAP_TX_FLAGS */
276 len += 2;
277
278 /* IEEE80211_RADIOTAP_DATA_RETRIES */
279 len += 1;
280
281 /* IEEE80211_RADIOTAP_MCS
282 * IEEE80211_RADIOTAP_VHT */
283 if (status && status->rate) {
284 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
285 len += 3;
286 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
287 len = ALIGN(len, 2) + 12;
288 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
289 len = ALIGN(len, 2) + 12;
290 } else if (info->status.rates[0].idx >= 0) {
291 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
292 len += 3;
293 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
294 len = ALIGN(len, 2) + 12;
295 }
296
297 return len;
298 }
299
300 static void
301 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
302 struct ieee80211_supported_band *sband,
303 struct sk_buff *skb, int retry_count,
304 int rtap_len, int shift,
305 struct ieee80211_tx_status *status)
306 {
307 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
308 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
309 struct ieee80211_radiotap_header *rthdr;
310 unsigned char *pos;
311 u16 legacy_rate = 0;
312 u16 txflags;
313
314 rthdr = skb_push(skb, rtap_len);
315
316 memset(rthdr, 0, rtap_len);
317 rthdr->it_len = cpu_to_le16(rtap_len);
318 rthdr->it_present =
319 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
320 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
321 pos = (unsigned char *)(rthdr + 1);
322
323 /*
324 * XXX: Once radiotap gets the bitmap reset thing the vendor
325 * extensions proposal contains, we can actually report
326 * the whole set of tries we did.
327 */
328
329 /* IEEE80211_RADIOTAP_RATE */
330
331 if (status && status->rate) {
332 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
333 RATE_INFO_FLAGS_DMG |
334 RATE_INFO_FLAGS_EDMG |
335 RATE_INFO_FLAGS_VHT_MCS |
336 RATE_INFO_FLAGS_HE_MCS)))
337 legacy_rate = status->rate->legacy;
338 } else if (info->status.rates[0].idx >= 0 &&
339 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
340 IEEE80211_TX_RC_VHT_MCS)))
341 legacy_rate =
342 sband->bitrates[info->status.rates[0].idx].bitrate;
343
344 if (legacy_rate) {
345 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
346 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
347 /* padding for tx flags */
348 pos += 2;
349 }
350
351 /* IEEE80211_RADIOTAP_TX_FLAGS */
352 txflags = 0;
353 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
354 !is_multicast_ether_addr(hdr->addr1))
355 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
356
357 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
358 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
359 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
360 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
361
362 put_unaligned_le16(txflags, pos);
363 pos += 2;
364
365 /* IEEE80211_RADIOTAP_DATA_RETRIES */
366 /* for now report the total retry_count */
367 *pos = retry_count;
368 pos++;
369
370 if (status && status->rate &&
371 (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
372 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
373 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
374 IEEE80211_RADIOTAP_MCS_HAVE_GI |
375 IEEE80211_RADIOTAP_MCS_HAVE_BW;
376 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
377 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
378 if (status->rate->bw == RATE_INFO_BW_40)
379 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
380 pos[2] = status->rate->mcs;
381 pos += 3;
382 } else if (status && status->rate &&
383 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
384 u16 known = local->hw.radiotap_vht_details &
385 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
386 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
387
388 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
389
390 /* required alignment from rthdr */
391 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
392
393 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
394 put_unaligned_le16(known, pos);
395 pos += 2;
396
397 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
398 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
400 pos++;
401
402 /* u8 bandwidth */
403 switch (status->rate->bw) {
404 case RATE_INFO_BW_160:
405 *pos = 11;
406 break;
407 case RATE_INFO_BW_80:
408 *pos = 4;
409 break;
410 case RATE_INFO_BW_40:
411 *pos = 1;
412 break;
413 default:
414 *pos = 0;
415 break;
416 }
417 pos++;
418
419 /* u8 mcs_nss[4] */
420 *pos = (status->rate->mcs << 4) | status->rate->nss;
421 pos += 4;
422
423 /* u8 coding */
424 pos++;
425 /* u8 group_id */
426 pos++;
427 /* u16 partial_aid */
428 pos += 2;
429 } else if (status && status->rate &&
430 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
431 struct ieee80211_radiotap_he *he;
432
433 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
434
435 /* required alignment from rthdr */
436 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
437 he = (struct ieee80211_radiotap_he *)pos;
438
439 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
440 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
441 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
442 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
443
444 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
445
446 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
447
448 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
449
450 #define CHECK_GI(s) \
451 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
452 (int)NL80211_RATE_INFO_HE_GI_##s)
453
454 CHECK_GI(0_8);
455 CHECK_GI(1_6);
456 CHECK_GI(3_2);
457
458 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
459 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
460
461 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
462
463 switch (status->rate->bw) {
464 case RATE_INFO_BW_20:
465 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
466 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
467 break;
468 case RATE_INFO_BW_40:
469 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
470 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
471 break;
472 case RATE_INFO_BW_80:
473 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
474 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
475 break;
476 case RATE_INFO_BW_160:
477 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
478 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
479 break;
480 case RATE_INFO_BW_HE_RU:
481 #define CHECK_RU_ALLOC(s) \
482 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
483 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
484
485 CHECK_RU_ALLOC(26);
486 CHECK_RU_ALLOC(52);
487 CHECK_RU_ALLOC(106);
488 CHECK_RU_ALLOC(242);
489 CHECK_RU_ALLOC(484);
490 CHECK_RU_ALLOC(996);
491 CHECK_RU_ALLOC(2x996);
492
493 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
494 status->rate->he_ru_alloc + 4);
495 break;
496 default:
497 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
498 }
499
500 pos += sizeof(struct ieee80211_radiotap_he);
501 }
502
503 if ((status && status->rate) || info->status.rates[0].idx < 0)
504 return;
505
506 /* IEEE80211_RADIOTAP_MCS
507 * IEEE80211_RADIOTAP_VHT */
508 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
509 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
510 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
511 IEEE80211_RADIOTAP_MCS_HAVE_GI |
512 IEEE80211_RADIOTAP_MCS_HAVE_BW;
513 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
514 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
515 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
516 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
517 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
518 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
519 pos[2] = info->status.rates[0].idx;
520 pos += 3;
521 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
522 u16 known = local->hw.radiotap_vht_details &
523 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
524 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
525
526 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
527
528 /* required alignment from rthdr */
529 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
530
531 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
532 put_unaligned_le16(known, pos);
533 pos += 2;
534
535 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
536 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
537 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
538 pos++;
539
540 /* u8 bandwidth */
541 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
542 *pos = 1;
543 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
544 *pos = 4;
545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
546 *pos = 11;
547 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
548 *pos = 0;
549 pos++;
550
551 /* u8 mcs_nss[4] */
552 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
553 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
554 pos += 4;
555
556 /* u8 coding */
557 pos++;
558 /* u8 group_id */
559 pos++;
560 /* u16 partial_aid */
561 pos += 2;
562 }
563 }
564
565 /*
566 * Handles the tx for TDLS teardown frames.
567 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
568 */
569 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
570 struct ieee80211_sub_if_data *sdata,
571 struct sk_buff *skb, u32 flags)
572 {
573 struct sk_buff *teardown_skb;
574 struct sk_buff *orig_teardown_skb;
575 bool is_teardown = false;
576
577 /* Get the teardown data we need and free the lock */
578 spin_lock(&sdata->u.mgd.teardown_lock);
579 teardown_skb = sdata->u.mgd.teardown_skb;
580 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
581 if ((skb == orig_teardown_skb) && teardown_skb) {
582 sdata->u.mgd.teardown_skb = NULL;
583 sdata->u.mgd.orig_teardown_skb = NULL;
584 is_teardown = true;
585 }
586 spin_unlock(&sdata->u.mgd.teardown_lock);
587
588 if (is_teardown) {
589 /* This mechanism relies on being able to get ACKs */
590 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
591
592 /* Check if peer has ACKed */
593 if (flags & IEEE80211_TX_STAT_ACK) {
594 dev_kfree_skb_any(teardown_skb);
595 } else {
596 tdls_dbg(sdata,
597 "TDLS Resending teardown through AP\n");
598
599 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
600 }
601 }
602 }
603
604 static struct ieee80211_sub_if_data *
605 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
606 {
607 struct ieee80211_sub_if_data *sdata;
608
609 if (skb->dev) {
610 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
611 if (!sdata->dev)
612 continue;
613
614 if (skb->dev == sdata->dev)
615 return sdata;
616 }
617
618 return NULL;
619 }
620
621 return rcu_dereference(local->p2p_sdata);
622 }
623
624 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
625 struct ieee80211_tx_info *info,
626 bool acked, bool dropped)
627 {
628 struct sk_buff *skb;
629 unsigned long flags;
630
631 spin_lock_irqsave(&local->ack_status_lock, flags);
632 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
633 spin_unlock_irqrestore(&local->ack_status_lock, flags);
634
635 if (!skb)
636 return;
637
638 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
639 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
640 struct ieee80211_sub_if_data *sdata;
641 struct ieee80211_hdr *hdr = (void *)skb->data;
642
643 rcu_read_lock();
644 sdata = ieee80211_sdata_from_skb(local, skb);
645 if (sdata) {
646 if (ieee80211_is_any_nullfunc(hdr->frame_control))
647 cfg80211_probe_status(sdata->dev, hdr->addr1,
648 cookie, acked,
649 info->status.ack_signal,
650 info->status.is_valid_ack_signal,
651 GFP_ATOMIC);
652 else
653 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
654 skb->data, skb->len,
655 acked, GFP_ATOMIC);
656 }
657 rcu_read_unlock();
658
659 dev_kfree_skb_any(skb);
660 } else if (dropped) {
661 dev_kfree_skb_any(skb);
662 } else {
663 /* consumes skb */
664 skb_complete_wifi_ack(skb, acked);
665 }
666 }
667
668 static void ieee80211_report_used_skb(struct ieee80211_local *local,
669 struct sk_buff *skb, bool dropped)
670 {
671 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
672 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
673 struct ieee80211_hdr *hdr = (void *)skb->data;
674 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
675
676 if (dropped)
677 acked = false;
678
679 if (tx_time_est) {
680 struct sta_info *sta;
681
682 rcu_read_lock();
683
684 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
685 ieee80211_sta_update_pending_airtime(local, sta,
686 skb_get_queue_mapping(skb),
687 tx_time_est,
688 true);
689 rcu_read_unlock();
690 }
691
692 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
693 struct ieee80211_sub_if_data *sdata;
694
695 rcu_read_lock();
696
697 sdata = ieee80211_sdata_from_skb(local, skb);
698
699 if (!sdata) {
700 skb->dev = NULL;
701 } else {
702 unsigned int hdr_size =
703 ieee80211_hdrlen(hdr->frame_control);
704
705 /* Check to see if packet is a TDLS teardown packet */
706 if (ieee80211_is_data(hdr->frame_control) &&
707 (ieee80211_get_tdls_action(skb, hdr_size) ==
708 WLAN_TDLS_TEARDOWN))
709 ieee80211_tdls_td_tx_handle(local, sdata, skb,
710 info->flags);
711 else
712 ieee80211_mgd_conn_tx_status(sdata,
713 hdr->frame_control,
714 acked);
715 }
716
717 rcu_read_unlock();
718 } else if (info->ack_frame_id) {
719 ieee80211_report_ack_skb(local, info, acked, dropped);
720 }
721
722 if (!dropped && skb->destructor) {
723 skb->wifi_acked_valid = 1;
724 skb->wifi_acked = acked;
725 }
726
727 ieee80211_led_tx(local);
728
729 if (skb_has_frag_list(skb)) {
730 kfree_skb_list(skb_shinfo(skb)->frag_list);
731 skb_shinfo(skb)->frag_list = NULL;
732 }
733 }
734
735 /*
736 * Use a static threshold for now, best value to be determined
737 * by testing ...
738 * Should it depend on:
739 * - on # of retransmissions
740 * - current throughput (higher value for higher tpt)?
741 */
742 #define STA_LOST_PKT_THRESHOLD 50
743 #define STA_LOST_TDLS_PKT_THRESHOLD 10
744 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
745
746 static void ieee80211_lost_packet(struct sta_info *sta,
747 struct ieee80211_tx_info *info)
748 {
749 /* If driver relies on its own algorithm for station kickout, skip
750 * mac80211 packet loss mechanism.
751 */
752 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
753 return;
754
755 /* This packet was aggregated but doesn't carry status info */
756 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
757 !(info->flags & IEEE80211_TX_STAT_AMPDU))
758 return;
759
760 sta->status_stats.lost_packets++;
761 if (!sta->sta.tdls &&
762 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
763 return;
764
765 /*
766 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
767 * of the last packets were lost, and that no ACK was received in the
768 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
769 * mechanism.
770 */
771 if (sta->sta.tdls &&
772 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
773 time_before(jiffies,
774 sta->status_stats.last_tdls_pkt_time +
775 STA_LOST_TDLS_PKT_TIME)))
776 return;
777
778 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
779 sta->status_stats.lost_packets, GFP_ATOMIC);
780 sta->status_stats.lost_packets = 0;
781 }
782
783 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
784 struct ieee80211_tx_info *info,
785 int *retry_count)
786 {
787 int rates_idx = -1;
788 int count = -1;
789 int i;
790
791 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
792 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
793 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
794 /* just the first aggr frame carry status info */
795 info->status.rates[i].idx = -1;
796 info->status.rates[i].count = 0;
797 break;
798 } else if (info->status.rates[i].idx < 0) {
799 break;
800 } else if (i >= hw->max_report_rates) {
801 /* the HW cannot have attempted that rate */
802 info->status.rates[i].idx = -1;
803 info->status.rates[i].count = 0;
804 break;
805 }
806
807 count += info->status.rates[i].count;
808 }
809 rates_idx = i - 1;
810
811 if (count < 0)
812 count = 0;
813
814 *retry_count = count;
815 return rates_idx;
816 }
817
818 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
819 struct ieee80211_supported_band *sband,
820 int retry_count, int shift, bool send_to_cooked,
821 struct ieee80211_tx_status *status)
822 {
823 struct sk_buff *skb2;
824 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
825 struct ieee80211_sub_if_data *sdata;
826 struct net_device *prev_dev = NULL;
827 int rtap_len;
828
829 /* send frame to monitor interfaces now */
830 rtap_len = ieee80211_tx_radiotap_len(info, status);
831 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
832 pr_err("ieee80211_tx_status: headroom too small\n");
833 dev_kfree_skb(skb);
834 return;
835 }
836 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
837 rtap_len, shift, status);
838
839 /* XXX: is this sufficient for BPF? */
840 skb_reset_mac_header(skb);
841 skb->ip_summed = CHECKSUM_UNNECESSARY;
842 skb->pkt_type = PACKET_OTHERHOST;
843 skb->protocol = htons(ETH_P_802_2);
844 memset(skb->cb, 0, sizeof(skb->cb));
845
846 rcu_read_lock();
847 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
848 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
849 if (!ieee80211_sdata_running(sdata))
850 continue;
851
852 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
853 !send_to_cooked)
854 continue;
855
856 if (prev_dev) {
857 skb2 = skb_clone(skb, GFP_ATOMIC);
858 if (skb2) {
859 skb2->dev = prev_dev;
860 netif_rx(skb2);
861 }
862 }
863
864 prev_dev = sdata->dev;
865 }
866 }
867 if (prev_dev) {
868 skb->dev = prev_dev;
869 netif_rx(skb);
870 skb = NULL;
871 }
872 rcu_read_unlock();
873 dev_kfree_skb(skb);
874 }
875
876 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
877 struct ieee80211_tx_status *status)
878 {
879 struct sk_buff *skb = status->skb;
880 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
881 struct ieee80211_local *local = hw_to_local(hw);
882 struct ieee80211_tx_info *info = status->info;
883 struct sta_info *sta;
884 __le16 fc;
885 struct ieee80211_supported_band *sband;
886 int retry_count;
887 int rates_idx;
888 bool send_to_cooked;
889 bool acked;
890 bool noack_success;
891 struct ieee80211_bar *bar;
892 int shift = 0;
893 int tid = IEEE80211_NUM_TIDS;
894 u16 tx_time_est;
895
896 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
897
898 sband = local->hw.wiphy->bands[info->band];
899 fc = hdr->frame_control;
900
901 if (status->sta) {
902 sta = container_of(status->sta, struct sta_info, sta);
903 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
904
905 if (info->flags & IEEE80211_TX_STATUS_EOSP)
906 clear_sta_flag(sta, WLAN_STA_SP);
907
908 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
909 noack_success = !!(info->flags &
910 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
911
912 /* mesh Peer Service Period support */
913 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
914 ieee80211_is_data_qos(fc))
915 ieee80211_mpsp_trigger_process(
916 ieee80211_get_qos_ctl(hdr), sta, true, acked);
917
918 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
919 /*
920 * The STA is in power save mode, so assume
921 * that this TX packet failed because of that.
922 */
923 ieee80211_handle_filtered_frame(local, sta, skb);
924 return;
925 }
926
927 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
928 (ieee80211_is_data(hdr->frame_control)) &&
929 (rates_idx != -1))
930 sta->tx_stats.last_rate =
931 info->status.rates[rates_idx];
932
933 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
934 (ieee80211_is_data_qos(fc))) {
935 u16 ssn;
936 u8 *qc;
937
938 qc = ieee80211_get_qos_ctl(hdr);
939 tid = qc[0] & 0xf;
940 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
941 & IEEE80211_SCTL_SEQ);
942 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
943 tid, ssn);
944 } else if (ieee80211_is_data_qos(fc)) {
945 u8 *qc = ieee80211_get_qos_ctl(hdr);
946
947 tid = qc[0] & 0xf;
948 }
949
950 if (!acked && ieee80211_is_back_req(fc)) {
951 u16 control;
952
953 /*
954 * BAR failed, store the last SSN and retry sending
955 * the BAR when the next unicast transmission on the
956 * same TID succeeds.
957 */
958 bar = (struct ieee80211_bar *) skb->data;
959 control = le16_to_cpu(bar->control);
960 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
961 u16 ssn = le16_to_cpu(bar->start_seq_num);
962
963 tid = (control &
964 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
965 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
966
967 ieee80211_set_bar_pending(sta, tid, ssn);
968 }
969 }
970
971 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
972 ieee80211_handle_filtered_frame(local, sta, skb);
973 return;
974 } else {
975 if (!acked && !noack_success)
976 sta->status_stats.retry_failed++;
977 sta->status_stats.retry_count += retry_count;
978
979 if (ieee80211_is_data_present(fc)) {
980 if (!acked && !noack_success)
981 sta->status_stats.msdu_failed[tid]++;
982
983 sta->status_stats.msdu_retries[tid] +=
984 retry_count;
985 }
986 }
987
988 rate_control_tx_status(local, sband, status);
989 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
990 ieee80211s_update_metric(local, sta, status);
991
992 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
993 ieee80211_frame_acked(sta, skb);
994
995 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
996 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
997 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
998 acked, info->status.tx_time);
999
1000 if (info->status.tx_time &&
1001 wiphy_ext_feature_isset(local->hw.wiphy,
1002 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
1003 ieee80211_sta_register_airtime(&sta->sta, tid,
1004 info->status.tx_time, 0);
1005
1006 if ((tx_time_est = ieee80211_info_get_tx_time_est(info)) > 0) {
1007 /* Do this here to avoid the expensive lookup of the sta
1008 * in ieee80211_report_used_skb().
1009 */
1010 ieee80211_sta_update_pending_airtime(local, sta,
1011 skb_get_queue_mapping(skb),
1012 tx_time_est,
1013 true);
1014 ieee80211_info_set_tx_time_est(info, 0);
1015 }
1016
1017 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1018 if (acked) {
1019 if (sta->status_stats.lost_packets)
1020 sta->status_stats.lost_packets = 0;
1021
1022 /* Track when last TDLS packet was ACKed */
1023 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1024 sta->status_stats.last_tdls_pkt_time =
1025 jiffies;
1026 } else if (noack_success) {
1027 /* nothing to do here, do not account as lost */
1028 } else {
1029 ieee80211_lost_packet(sta, info);
1030 }
1031 }
1032 }
1033
1034 /* SNMP counters
1035 * Fragments are passed to low-level drivers as separate skbs, so these
1036 * are actually fragments, not frames. Update frame counters only for
1037 * the first fragment of the frame. */
1038 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1039 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1040 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1041 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1042 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1043 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1044 if (retry_count > 0)
1045 I802_DEBUG_INC(local->dot11RetryCount);
1046 if (retry_count > 1)
1047 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1048 }
1049
1050 /* This counter shall be incremented for an acknowledged MPDU
1051 * with an individual address in the address 1 field or an MPDU
1052 * with a multicast address in the address 1 field of type Data
1053 * or Management. */
1054 if (!is_multicast_ether_addr(hdr->addr1) ||
1055 ieee80211_is_data(fc) ||
1056 ieee80211_is_mgmt(fc))
1057 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1058 } else {
1059 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1060 I802_DEBUG_INC(local->dot11FailedCount);
1061 }
1062
1063 if (ieee80211_is_any_nullfunc(fc) &&
1064 ieee80211_has_pm(fc) &&
1065 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1066 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1067 local->ps_sdata && !(local->scanning)) {
1068 if (info->flags & IEEE80211_TX_STAT_ACK) {
1069 local->ps_sdata->u.mgd.flags |=
1070 IEEE80211_STA_NULLFUNC_ACKED;
1071 } else
1072 mod_timer(&local->dynamic_ps_timer, jiffies +
1073 msecs_to_jiffies(10));
1074 }
1075
1076 ieee80211_report_used_skb(local, skb, false);
1077
1078 /* this was a transmitted frame, but now we want to reuse it */
1079 skb_orphan(skb);
1080
1081 /* Need to make a copy before skb->cb gets cleared */
1082 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1083 !(ieee80211_is_data(fc));
1084
1085 /*
1086 * This is a bit racy but we can avoid a lot of work
1087 * with this test...
1088 */
1089 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1090 dev_kfree_skb(skb);
1091 return;
1092 }
1093
1094 /* send to monitor interfaces */
1095 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1096 send_to_cooked, status);
1097 }
1098
1099 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1100 {
1101 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1102 struct ieee80211_local *local = hw_to_local(hw);
1103 struct ieee80211_tx_status status = {
1104 .skb = skb,
1105 .info = IEEE80211_SKB_CB(skb),
1106 };
1107 struct sta_info *sta;
1108
1109 rcu_read_lock();
1110
1111 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1112 if (sta)
1113 status.sta = &sta->sta;
1114
1115 __ieee80211_tx_status(hw, &status);
1116 rcu_read_unlock();
1117 }
1118 EXPORT_SYMBOL(ieee80211_tx_status);
1119
1120 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1121 struct ieee80211_tx_status *status)
1122 {
1123 struct ieee80211_local *local = hw_to_local(hw);
1124 struct ieee80211_tx_info *info = status->info;
1125 struct ieee80211_sta *pubsta = status->sta;
1126 struct ieee80211_supported_band *sband;
1127 int retry_count;
1128 bool acked, noack_success;
1129
1130 if (status->skb)
1131 return __ieee80211_tx_status(hw, status);
1132
1133 if (!status->sta)
1134 return;
1135
1136 ieee80211_tx_get_rates(hw, info, &retry_count);
1137
1138 sband = hw->wiphy->bands[info->band];
1139
1140 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1141 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1142
1143 if (pubsta) {
1144 struct sta_info *sta;
1145
1146 sta = container_of(pubsta, struct sta_info, sta);
1147
1148 if (!acked && !noack_success)
1149 sta->status_stats.retry_failed++;
1150 sta->status_stats.retry_count += retry_count;
1151
1152 if (acked) {
1153 sta->status_stats.last_ack = jiffies;
1154
1155 if (sta->status_stats.lost_packets)
1156 sta->status_stats.lost_packets = 0;
1157
1158 /* Track when last TDLS packet was ACKed */
1159 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1160 sta->status_stats.last_tdls_pkt_time = jiffies;
1161 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1162 return;
1163 } else if (noack_success) {
1164 /* nothing to do here, do not account as lost */
1165 } else {
1166 ieee80211_lost_packet(sta, info);
1167 }
1168
1169 rate_control_tx_status(local, sband, status);
1170 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1171 ieee80211s_update_metric(local, sta, status);
1172 }
1173
1174 if (acked || noack_success) {
1175 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1176 if (!pubsta)
1177 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1178 if (retry_count > 0)
1179 I802_DEBUG_INC(local->dot11RetryCount);
1180 if (retry_count > 1)
1181 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1182 } else {
1183 I802_DEBUG_INC(local->dot11FailedCount);
1184 }
1185 }
1186 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1187
1188 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1189 struct ieee80211_sta *pubsta,
1190 struct ieee80211_tx_info *info)
1191 {
1192 struct ieee80211_local *local = hw_to_local(hw);
1193 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1194 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1195 struct ieee80211_tx_status status = {
1196 .info = info,
1197 .sta = pubsta,
1198 };
1199
1200 rate_control_tx_status(local, sband, &status);
1201
1202 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1203 sta->tx_stats.last_rate = info->status.rates[0];
1204 }
1205 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1206
1207 void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1208 struct ieee80211_vif *vif,
1209 struct sk_buff *skb)
1210 {
1211 struct ieee80211_local *local = hw_to_local(hw);
1212 struct ieee80211_sub_if_data *sdata;
1213 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1214 struct sta_info *sta;
1215 int retry_count;
1216 int rates_idx;
1217 bool acked;
1218
1219 sdata = vif_to_sdata(vif);
1220
1221 acked = info->flags & IEEE80211_TX_STAT_ACK;
1222 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1223
1224 rcu_read_lock();
1225
1226 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
1227 goto counters_update;
1228
1229 if (IS_ERR(sta))
1230 goto counters_update;
1231
1232 if (!acked)
1233 sta->status_stats.retry_failed++;
1234
1235 if (rates_idx != -1)
1236 sta->tx_stats.last_rate = info->status.rates[rates_idx];
1237
1238 sta->status_stats.retry_count += retry_count;
1239
1240 if (ieee80211_hw_check(hw, REPORTS_TX_ACK_STATUS)) {
1241 if (acked && vif->type == NL80211_IFTYPE_STATION)
1242 ieee80211_sta_reset_conn_monitor(sdata);
1243
1244 sta->status_stats.last_ack = jiffies;
1245 if (info->flags & IEEE80211_TX_STAT_ACK) {
1246 if (sta->status_stats.lost_packets)
1247 sta->status_stats.lost_packets = 0;
1248
1249 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1250 sta->status_stats.last_tdls_pkt_time = jiffies;
1251 } else {
1252 ieee80211_lost_packet(sta, info);
1253 }
1254 }
1255
1256 counters_update:
1257 rcu_read_unlock();
1258 ieee80211_led_tx(local);
1259
1260 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1261 !(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED))
1262 goto skip_stats_update;
1263
1264 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1265 if (is_multicast_ether_addr(skb->data))
1266 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1267 if (retry_count > 0)
1268 I802_DEBUG_INC(local->dot11RetryCount);
1269 if (retry_count > 1)
1270 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1271
1272 skip_stats_update:
1273 ieee80211_report_used_skb(local, skb, false);
1274 dev_kfree_skb(skb);
1275 }
1276 EXPORT_SYMBOL(ieee80211_tx_status_8023);
1277
1278 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1279 {
1280 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1281 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1282 num_packets, GFP_ATOMIC);
1283 }
1284 EXPORT_SYMBOL(ieee80211_report_low_ack);
1285
1286 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1287 {
1288 struct ieee80211_local *local = hw_to_local(hw);
1289
1290 ieee80211_report_used_skb(local, skb, true);
1291 dev_kfree_skb_any(skb);
1292 }
1293 EXPORT_SYMBOL(ieee80211_free_txskb);
1294
1295 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1296 struct sk_buff_head *skbs)
1297 {
1298 struct sk_buff *skb;
1299
1300 while ((skb = __skb_dequeue(skbs)))
1301 ieee80211_free_txskb(hw, skb);
1302 }
Linux with added FPC-III support