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
ieee80211_tx_status_irqsafe(struct ieee80211_hw * hw,struct sk_buff * skb)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
ieee80211_handle_filtered_frame(struct ieee80211_local * local,struct sta_info * sta,struct sk_buff * skb)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_TX_CTL_HW_80211_ENCAP)) {
54 ieee80211_free_txskb(&local->hw, skb);
55 return;
56 }
57
58 /*
59 * This skb 'survived' a round-trip through the driver, and
60 * hopefully the driver didn't mangle it too badly. However,
61 * we can definitely not rely on the control information
62 * being correct. Clear it so we don't get junk there, and
63 * indicate that it needs new processing, but must not be
64 * modified/encrypted again.
65 */
66 memset(&info->control, 0, sizeof(info->control));
67
68 info->control.jiffies = jiffies;
69 info->control.vif = &sta->sdata->vif;
70 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
71 info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION;
72 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
73
74 sta->status_stats.filtered++;
75
76 /*
77 * Clear more-data bit on filtered frames, it might be set
78 * but later frames might time out so it might have to be
79 * clear again ... It's all rather unlikely (this frame
80 * should time out first, right?) but let's not confuse
81 * peers unnecessarily.
82 */
83 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
84 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
85
86 if (ieee80211_is_data_qos(hdr->frame_control)) {
87 u8 *p = ieee80211_get_qos_ctl(hdr);
88 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
89
90 /*
91 * Clear EOSP if set, this could happen e.g.
92 * if an absence period (us being a P2P GO)
93 * shortens the SP.
94 */
95 if (*p & IEEE80211_QOS_CTL_EOSP)
96 *p &= ~IEEE80211_QOS_CTL_EOSP;
97 ac = ieee80211_ac_from_tid(tid);
98 } else {
99 ac = IEEE80211_AC_BE;
100 }
101
102 /*
103 * Clear the TX filter mask for this STA when sending the next
104 * packet. If the STA went to power save mode, this will happen
105 * when it wakes up for the next time.
106 */
107 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
108 ieee80211_clear_fast_xmit(sta);
109
110 /*
111 * This code races in the following way:
112 *
113 * (1) STA sends frame indicating it will go to sleep and does so
114 * (2) hardware/firmware adds STA to filter list, passes frame up
115 * (3) hardware/firmware processes TX fifo and suppresses a frame
116 * (4) we get TX status before having processed the frame and
117 * knowing that the STA has gone to sleep.
118 *
119 * This is actually quite unlikely even when both those events are
120 * processed from interrupts coming in quickly after one another or
121 * even at the same time because we queue both TX status events and
122 * RX frames to be processed by a tasklet and process them in the
123 * same order that they were received or TX status last. Hence, there
124 * is no race as long as the frame RX is processed before the next TX
125 * status, which drivers can ensure, see below.
126 *
127 * Note that this can only happen if the hardware or firmware can
128 * actually add STAs to the filter list, if this is done by the
129 * driver in response to set_tim() (which will only reduce the race
130 * this whole filtering tries to solve, not completely solve it)
131 * this situation cannot happen.
132 *
133 * To completely solve this race drivers need to make sure that they
134 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
135 * functions and
136 * (b) always process RX events before TX status events if ordering
137 * can be unknown, for example with different interrupt status
138 * bits.
139 * (c) if PS mode transitions are manual (i.e. the flag
140 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
141 * changes before calling TX status events if ordering can be
142 * unknown.
143 */
144 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
145 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
146 skb_queue_tail(&sta->tx_filtered[ac], skb);
147 sta_info_recalc_tim(sta);
148
149 if (!timer_pending(&local->sta_cleanup))
150 mod_timer(&local->sta_cleanup,
151 round_jiffies(jiffies +
152 STA_INFO_CLEANUP_INTERVAL));
153 return;
154 }
155
156 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
157 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
158 /* Software retry the packet once */
159 info->flags |= IEEE80211_TX_INTFL_RETRIED;
160 ieee80211_add_pending_skb(local, skb);
161 return;
162 }
163
164 ps_dbg_ratelimited(sta->sdata,
165 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
166 skb_queue_len(&sta->tx_filtered[ac]),
167 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
168 ieee80211_free_txskb(&local->hw, skb);
169 }
170
ieee80211_check_pending_bar(struct sta_info * sta,u8 * addr,u8 tid)171 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
172 {
173 struct tid_ampdu_tx *tid_tx;
174
175 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
176 if (!tid_tx || !tid_tx->bar_pending)
177 return;
178
179 tid_tx->bar_pending = false;
180 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
181 }
182
ieee80211_frame_acked(struct sta_info * sta,struct sk_buff * skb)183 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
184 {
185 struct ieee80211_mgmt *mgmt = (void *) skb->data;
186 struct ieee80211_local *local = sta->local;
187 struct ieee80211_sub_if_data *sdata = sta->sdata;
188
189 if (ieee80211_is_data_qos(mgmt->frame_control)) {
190 struct ieee80211_hdr *hdr = (void *) skb->data;
191 u8 *qc = ieee80211_get_qos_ctl(hdr);
192 u16 tid = qc[0] & 0xf;
193
194 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
195 }
196
197 if (ieee80211_is_action(mgmt->frame_control) &&
198 !ieee80211_has_protected(mgmt->frame_control) &&
199 mgmt->u.action.category == WLAN_CATEGORY_HT &&
200 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
201 ieee80211_sdata_running(sdata)) {
202 enum ieee80211_smps_mode smps_mode;
203
204 switch (mgmt->u.action.u.ht_smps.smps_control) {
205 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
206 smps_mode = IEEE80211_SMPS_DYNAMIC;
207 break;
208 case WLAN_HT_SMPS_CONTROL_STATIC:
209 smps_mode = IEEE80211_SMPS_STATIC;
210 break;
211 case WLAN_HT_SMPS_CONTROL_DISABLED:
212 default: /* shouldn't happen since we don't send that */
213 smps_mode = IEEE80211_SMPS_OFF;
214 break;
215 }
216
217 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
218 /*
219 * This update looks racy, but isn't -- if we come
220 * here we've definitely got a station that we're
221 * talking to, and on a managed interface that can
222 * only be the AP. And the only other place updating
223 * this variable in managed mode is before association.
224 */
225 sdata->smps_mode = smps_mode;
226 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
227 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
228 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
229 sta->known_smps_mode = smps_mode;
230 }
231 }
232 }
233
ieee80211_set_bar_pending(struct sta_info * sta,u8 tid,u16 ssn)234 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
235 {
236 struct tid_ampdu_tx *tid_tx;
237
238 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
239 if (!tid_tx)
240 return;
241
242 tid_tx->failed_bar_ssn = ssn;
243 tid_tx->bar_pending = true;
244 }
245
ieee80211_tx_radiotap_len(struct ieee80211_tx_info * info,struct ieee80211_tx_status * status)246 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
247 struct ieee80211_tx_status *status)
248 {
249 int len = sizeof(struct ieee80211_radiotap_header);
250
251 /* IEEE80211_RADIOTAP_RATE rate */
252 if (status && status->rate && !(status->rate->flags &
253 (RATE_INFO_FLAGS_MCS |
254 RATE_INFO_FLAGS_DMG |
255 RATE_INFO_FLAGS_EDMG |
256 RATE_INFO_FLAGS_VHT_MCS |
257 RATE_INFO_FLAGS_HE_MCS)))
258 len += 2;
259 else if (info->status.rates[0].idx >= 0 &&
260 !(info->status.rates[0].flags &
261 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
262 len += 2;
263
264 /* IEEE80211_RADIOTAP_TX_FLAGS */
265 len += 2;
266
267 /* IEEE80211_RADIOTAP_DATA_RETRIES */
268 len += 1;
269
270 /* IEEE80211_RADIOTAP_MCS
271 * IEEE80211_RADIOTAP_VHT */
272 if (status && status->rate) {
273 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
274 len += 3;
275 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
276 len = ALIGN(len, 2) + 12;
277 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
278 len = ALIGN(len, 2) + 12;
279 } else if (info->status.rates[0].idx >= 0) {
280 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
281 len += 3;
282 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
283 len = ALIGN(len, 2) + 12;
284 }
285
286 return len;
287 }
288
289 static void
ieee80211_add_tx_radiotap_header(struct ieee80211_local * local,struct ieee80211_supported_band * sband,struct sk_buff * skb,int retry_count,int rtap_len,int shift,struct ieee80211_tx_status * status)290 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
291 struct ieee80211_supported_band *sband,
292 struct sk_buff *skb, int retry_count,
293 int rtap_len, int shift,
294 struct ieee80211_tx_status *status)
295 {
296 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
297 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
298 struct ieee80211_radiotap_header *rthdr;
299 unsigned char *pos;
300 u16 legacy_rate = 0;
301 u16 txflags;
302
303 rthdr = skb_push(skb, rtap_len);
304
305 memset(rthdr, 0, rtap_len);
306 rthdr->it_len = cpu_to_le16(rtap_len);
307 rthdr->it_present =
308 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
309 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
310 pos = (unsigned char *)(rthdr + 1);
311
312 /*
313 * XXX: Once radiotap gets the bitmap reset thing the vendor
314 * extensions proposal contains, we can actually report
315 * the whole set of tries we did.
316 */
317
318 /* IEEE80211_RADIOTAP_RATE */
319
320 if (status && status->rate) {
321 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
322 RATE_INFO_FLAGS_DMG |
323 RATE_INFO_FLAGS_EDMG |
324 RATE_INFO_FLAGS_VHT_MCS |
325 RATE_INFO_FLAGS_HE_MCS)))
326 legacy_rate = status->rate->legacy;
327 } else if (info->status.rates[0].idx >= 0 &&
328 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
329 IEEE80211_TX_RC_VHT_MCS)))
330 legacy_rate =
331 sband->bitrates[info->status.rates[0].idx].bitrate;
332
333 if (legacy_rate) {
334 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
335 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
336 /* padding for tx flags */
337 pos += 2;
338 }
339
340 /* IEEE80211_RADIOTAP_TX_FLAGS */
341 txflags = 0;
342 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
343 !is_multicast_ether_addr(hdr->addr1))
344 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
345
346 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
347 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
348 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
349 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
350
351 put_unaligned_le16(txflags, pos);
352 pos += 2;
353
354 /* IEEE80211_RADIOTAP_DATA_RETRIES */
355 /* for now report the total retry_count */
356 *pos = retry_count;
357 pos++;
358
359 if (status && status->rate &&
360 (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
361 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
362 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
363 IEEE80211_RADIOTAP_MCS_HAVE_GI |
364 IEEE80211_RADIOTAP_MCS_HAVE_BW;
365 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
366 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
367 if (status->rate->bw == RATE_INFO_BW_40)
368 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
369 pos[2] = status->rate->mcs;
370 pos += 3;
371 } else if (status && status->rate &&
372 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
373 u16 known = local->hw.radiotap_vht_details &
374 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
375 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
376
377 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
378
379 /* required alignment from rthdr */
380 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
381
382 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
383 put_unaligned_le16(known, pos);
384 pos += 2;
385
386 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
387 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
388 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
389 pos++;
390
391 /* u8 bandwidth */
392 switch (status->rate->bw) {
393 case RATE_INFO_BW_160:
394 *pos = 11;
395 break;
396 case RATE_INFO_BW_80:
397 *pos = 4;
398 break;
399 case RATE_INFO_BW_40:
400 *pos = 1;
401 break;
402 default:
403 *pos = 0;
404 break;
405 }
406 pos++;
407
408 /* u8 mcs_nss[4] */
409 *pos = (status->rate->mcs << 4) | status->rate->nss;
410 pos += 4;
411
412 /* u8 coding */
413 pos++;
414 /* u8 group_id */
415 pos++;
416 /* u16 partial_aid */
417 pos += 2;
418 } else if (status && status->rate &&
419 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
420 struct ieee80211_radiotap_he *he;
421
422 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
423
424 /* required alignment from rthdr */
425 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
426 he = (struct ieee80211_radiotap_he *)pos;
427
428 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
429 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
430 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
431 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
432
433 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
434
435 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
436
437 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
438
439 #define CHECK_GI(s) \
440 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
441 (int)NL80211_RATE_INFO_HE_GI_##s)
442
443 CHECK_GI(0_8);
444 CHECK_GI(1_6);
445 CHECK_GI(3_2);
446
447 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
448 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
449
450 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
451
452 switch (status->rate->bw) {
453 case RATE_INFO_BW_20:
454 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
455 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
456 break;
457 case RATE_INFO_BW_40:
458 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
459 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
460 break;
461 case RATE_INFO_BW_80:
462 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
463 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
464 break;
465 case RATE_INFO_BW_160:
466 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
467 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
468 break;
469 case RATE_INFO_BW_HE_RU:
470 #define CHECK_RU_ALLOC(s) \
471 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
472 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
473
474 CHECK_RU_ALLOC(26);
475 CHECK_RU_ALLOC(52);
476 CHECK_RU_ALLOC(106);
477 CHECK_RU_ALLOC(242);
478 CHECK_RU_ALLOC(484);
479 CHECK_RU_ALLOC(996);
480 CHECK_RU_ALLOC(2x996);
481
482 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
483 status->rate->he_ru_alloc + 4);
484 break;
485 default:
486 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
487 }
488
489 pos += sizeof(struct ieee80211_radiotap_he);
490 }
491
492 if ((status && status->rate) || info->status.rates[0].idx < 0)
493 return;
494
495 /* IEEE80211_RADIOTAP_MCS
496 * IEEE80211_RADIOTAP_VHT */
497 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
498 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
499 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
500 IEEE80211_RADIOTAP_MCS_HAVE_GI |
501 IEEE80211_RADIOTAP_MCS_HAVE_BW;
502 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
503 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
504 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
505 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
506 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
507 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
508 pos[2] = info->status.rates[0].idx;
509 pos += 3;
510 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
511 u16 known = local->hw.radiotap_vht_details &
512 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
513 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
514
515 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
516
517 /* required alignment from rthdr */
518 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
519
520 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
521 put_unaligned_le16(known, pos);
522 pos += 2;
523
524 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
525 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
526 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
527 pos++;
528
529 /* u8 bandwidth */
530 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
531 *pos = 1;
532 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
533 *pos = 4;
534 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
535 *pos = 11;
536 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
537 *pos = 0;
538 pos++;
539
540 /* u8 mcs_nss[4] */
541 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
542 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
543 pos += 4;
544
545 /* u8 coding */
546 pos++;
547 /* u8 group_id */
548 pos++;
549 /* u16 partial_aid */
550 pos += 2;
551 }
552 }
553
554 /*
555 * Handles the tx for TDLS teardown frames.
556 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
557 */
ieee80211_tdls_td_tx_handle(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u32 flags)558 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
559 struct ieee80211_sub_if_data *sdata,
560 struct sk_buff *skb, u32 flags)
561 {
562 struct sk_buff *teardown_skb;
563 struct sk_buff *orig_teardown_skb;
564 bool is_teardown = false;
565
566 /* Get the teardown data we need and free the lock */
567 spin_lock(&sdata->u.mgd.teardown_lock);
568 teardown_skb = sdata->u.mgd.teardown_skb;
569 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
570 if ((skb == orig_teardown_skb) && teardown_skb) {
571 sdata->u.mgd.teardown_skb = NULL;
572 sdata->u.mgd.orig_teardown_skb = NULL;
573 is_teardown = true;
574 }
575 spin_unlock(&sdata->u.mgd.teardown_lock);
576
577 if (is_teardown) {
578 /* This mechanism relies on being able to get ACKs */
579 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
580
581 /* Check if peer has ACKed */
582 if (flags & IEEE80211_TX_STAT_ACK) {
583 dev_kfree_skb_any(teardown_skb);
584 } else {
585 tdls_dbg(sdata,
586 "TDLS Resending teardown through AP\n");
587
588 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
589 }
590 }
591 }
592
593 static struct ieee80211_sub_if_data *
ieee80211_sdata_from_skb(struct ieee80211_local * local,struct sk_buff * skb)594 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
595 {
596 struct ieee80211_sub_if_data *sdata;
597
598 if (skb->dev) {
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 if (!sdata->dev)
601 continue;
602
603 if (skb->dev == sdata->dev)
604 return sdata;
605 }
606
607 return NULL;
608 }
609
610 return rcu_dereference(local->p2p_sdata);
611 }
612
ieee80211_report_ack_skb(struct ieee80211_local * local,struct ieee80211_tx_info * info,bool acked,bool dropped)613 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
614 struct ieee80211_tx_info *info,
615 bool acked, bool dropped)
616 {
617 struct sk_buff *skb;
618 unsigned long flags;
619
620 spin_lock_irqsave(&local->ack_status_lock, flags);
621 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
622 spin_unlock_irqrestore(&local->ack_status_lock, flags);
623
624 if (!skb)
625 return;
626
627 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
628 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
629 struct ieee80211_sub_if_data *sdata;
630 struct ieee80211_hdr *hdr = (void *)skb->data;
631 __be16 ethertype = 0;
632
633 if (skb->len >= ETH_HLEN && skb->protocol == cpu_to_be16(ETH_P_802_3))
634 skb_copy_bits(skb, 2 * ETH_ALEN, ðertype, ETH_TLEN);
635
636 rcu_read_lock();
637 sdata = ieee80211_sdata_from_skb(local, skb);
638 if (sdata) {
639 if (ethertype == sdata->control_port_protocol ||
640 ethertype == cpu_to_be16(ETH_P_PREAUTH))
641 cfg80211_control_port_tx_status(&sdata->wdev,
642 cookie,
643 skb->data,
644 skb->len,
645 acked,
646 GFP_ATOMIC);
647 else if (ieee80211_is_any_nullfunc(hdr->frame_control))
648 cfg80211_probe_status(sdata->dev, hdr->addr1,
649 cookie, acked,
650 info->status.ack_signal,
651 info->status.is_valid_ack_signal,
652 GFP_ATOMIC);
653 else if (ieee80211_is_mgmt(hdr->frame_control))
654 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
655 skb->data, skb->len,
656 acked, GFP_ATOMIC);
657 else
658 pr_warn("Unknown status report in ack skb\n");
659
660 }
661 rcu_read_unlock();
662
663 dev_kfree_skb_any(skb);
664 } else if (dropped) {
665 dev_kfree_skb_any(skb);
666 } else {
667 /* consumes skb */
668 skb_complete_wifi_ack(skb, acked);
669 }
670 }
671
ieee80211_report_used_skb(struct ieee80211_local * local,struct sk_buff * skb,bool dropped)672 static void ieee80211_report_used_skb(struct ieee80211_local *local,
673 struct sk_buff *skb, bool dropped)
674 {
675 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
676 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
677 struct ieee80211_hdr *hdr = (void *)skb->data;
678 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
679
680 if (dropped)
681 acked = false;
682
683 if (tx_time_est) {
684 struct sta_info *sta;
685
686 rcu_read_lock();
687
688 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
689 ieee80211_sta_update_pending_airtime(local, sta,
690 skb_get_queue_mapping(skb),
691 tx_time_est,
692 true);
693 rcu_read_unlock();
694 }
695
696 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
697 struct ieee80211_sub_if_data *sdata;
698
699 rcu_read_lock();
700
701 sdata = ieee80211_sdata_from_skb(local, skb);
702
703 if (!sdata) {
704 skb->dev = NULL;
705 } else {
706 unsigned int hdr_size =
707 ieee80211_hdrlen(hdr->frame_control);
708
709 /* Check to see if packet is a TDLS teardown packet */
710 if (ieee80211_is_data(hdr->frame_control) &&
711 (ieee80211_get_tdls_action(skb, hdr_size) ==
712 WLAN_TDLS_TEARDOWN))
713 ieee80211_tdls_td_tx_handle(local, sdata, skb,
714 info->flags);
715 else
716 ieee80211_mgd_conn_tx_status(sdata,
717 hdr->frame_control,
718 acked);
719 }
720
721 rcu_read_unlock();
722 } else if (info->ack_frame_id) {
723 ieee80211_report_ack_skb(local, info, acked, dropped);
724 }
725
726 if (!dropped && skb->destructor) {
727 skb->wifi_acked_valid = 1;
728 skb->wifi_acked = acked;
729 }
730
731 ieee80211_led_tx(local);
732
733 if (skb_has_frag_list(skb)) {
734 kfree_skb_list(skb_shinfo(skb)->frag_list);
735 skb_shinfo(skb)->frag_list = NULL;
736 }
737 }
738
739 /*
740 * Use a static threshold for now, best value to be determined
741 * by testing ...
742 * Should it depend on:
743 * - on # of retransmissions
744 * - current throughput (higher value for higher tpt)?
745 */
746 #define STA_LOST_PKT_THRESHOLD 50
747 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
748 #define STA_LOST_TDLS_PKT_THRESHOLD 10
749 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
750
ieee80211_lost_packet(struct sta_info * sta,struct ieee80211_tx_info * info)751 static void ieee80211_lost_packet(struct sta_info *sta,
752 struct ieee80211_tx_info *info)
753 {
754 unsigned long pkt_time = STA_LOST_PKT_TIME;
755 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
756
757 /* If driver relies on its own algorithm for station kickout, skip
758 * mac80211 packet loss mechanism.
759 */
760 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
761 return;
762
763 /* This packet was aggregated but doesn't carry status info */
764 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
765 !(info->flags & IEEE80211_TX_STAT_AMPDU))
766 return;
767
768 sta->status_stats.lost_packets++;
769 if (sta->sta.tdls) {
770 pkt_time = STA_LOST_TDLS_PKT_TIME;
771 pkt_thr = STA_LOST_PKT_THRESHOLD;
772 }
773
774 /*
775 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
776 * of the last packets were lost, and that no ACK was received in the
777 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
778 * mechanism.
779 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
780 */
781 if (sta->status_stats.lost_packets < pkt_thr ||
782 !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time))
783 return;
784
785 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
786 sta->status_stats.lost_packets, GFP_ATOMIC);
787 sta->status_stats.lost_packets = 0;
788 }
789
ieee80211_tx_get_rates(struct ieee80211_hw * hw,struct ieee80211_tx_info * info,int * retry_count)790 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
791 struct ieee80211_tx_info *info,
792 int *retry_count)
793 {
794 int count = -1;
795 int i;
796
797 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
798 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
799 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
800 /* just the first aggr frame carry status info */
801 info->status.rates[i].idx = -1;
802 info->status.rates[i].count = 0;
803 break;
804 } else if (info->status.rates[i].idx < 0) {
805 break;
806 } else if (i >= hw->max_report_rates) {
807 /* the HW cannot have attempted that rate */
808 info->status.rates[i].idx = -1;
809 info->status.rates[i].count = 0;
810 break;
811 }
812
813 count += info->status.rates[i].count;
814 }
815
816 if (count < 0)
817 count = 0;
818
819 *retry_count = count;
820 return i - 1;
821 }
822
ieee80211_tx_monitor(struct ieee80211_local * local,struct sk_buff * skb,struct ieee80211_supported_band * sband,int retry_count,int shift,bool send_to_cooked,struct ieee80211_tx_status * status)823 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
824 struct ieee80211_supported_band *sband,
825 int retry_count, int shift, bool send_to_cooked,
826 struct ieee80211_tx_status *status)
827 {
828 struct sk_buff *skb2;
829 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
830 struct ieee80211_sub_if_data *sdata;
831 struct net_device *prev_dev = NULL;
832 int rtap_len;
833
834 /* send frame to monitor interfaces now */
835 rtap_len = ieee80211_tx_radiotap_len(info, status);
836 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
837 pr_err("ieee80211_tx_status: headroom too small\n");
838 dev_kfree_skb(skb);
839 return;
840 }
841 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
842 rtap_len, shift, status);
843
844 /* XXX: is this sufficient for BPF? */
845 skb_reset_mac_header(skb);
846 skb->ip_summed = CHECKSUM_UNNECESSARY;
847 skb->pkt_type = PACKET_OTHERHOST;
848 skb->protocol = htons(ETH_P_802_2);
849 memset(skb->cb, 0, sizeof(skb->cb));
850
851 rcu_read_lock();
852 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
853 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
854 if (!ieee80211_sdata_running(sdata))
855 continue;
856
857 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
858 !send_to_cooked)
859 continue;
860
861 if (prev_dev) {
862 skb2 = skb_clone(skb, GFP_ATOMIC);
863 if (skb2) {
864 skb2->dev = prev_dev;
865 netif_rx(skb2);
866 }
867 }
868
869 prev_dev = sdata->dev;
870 }
871 }
872 if (prev_dev) {
873 skb->dev = prev_dev;
874 netif_rx(skb);
875 skb = NULL;
876 }
877 rcu_read_unlock();
878 dev_kfree_skb(skb);
879 }
880
__ieee80211_tx_status(struct ieee80211_hw * hw,struct ieee80211_tx_status * status,int rates_idx,int retry_count)881 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
882 struct ieee80211_tx_status *status,
883 int rates_idx, int retry_count)
884 {
885 struct sk_buff *skb = status->skb;
886 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
887 struct ieee80211_local *local = hw_to_local(hw);
888 struct ieee80211_tx_info *info = status->info;
889 struct sta_info *sta;
890 __le16 fc;
891 struct ieee80211_supported_band *sband;
892 bool send_to_cooked;
893 bool acked;
894 bool noack_success;
895 struct ieee80211_bar *bar;
896 int shift = 0;
897 int tid = IEEE80211_NUM_TIDS;
898
899 sband = local->hw.wiphy->bands[info->band];
900 fc = hdr->frame_control;
901
902 if (status->sta) {
903 sta = container_of(status->sta, struct sta_info, sta);
904 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
905
906 if (info->flags & IEEE80211_TX_STATUS_EOSP)
907 clear_sta_flag(sta, WLAN_STA_SP);
908
909 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
910 noack_success = !!(info->flags &
911 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
912
913 /* mesh Peer Service Period support */
914 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
915 ieee80211_is_data_qos(fc))
916 ieee80211_mpsp_trigger_process(
917 ieee80211_get_qos_ctl(hdr), sta, true, acked);
918
919 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
920 (ieee80211_is_data(hdr->frame_control)) &&
921 (rates_idx != -1))
922 sta->tx_stats.last_rate =
923 info->status.rates[rates_idx];
924
925 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
926 (ieee80211_is_data_qos(fc))) {
927 u16 ssn;
928 u8 *qc;
929
930 qc = ieee80211_get_qos_ctl(hdr);
931 tid = qc[0] & 0xf;
932 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
933 & IEEE80211_SCTL_SEQ);
934 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
935 tid, ssn);
936 } else if (ieee80211_is_data_qos(fc)) {
937 u8 *qc = ieee80211_get_qos_ctl(hdr);
938
939 tid = qc[0] & 0xf;
940 }
941
942 if (!acked && ieee80211_is_back_req(fc)) {
943 u16 control;
944
945 /*
946 * BAR failed, store the last SSN and retry sending
947 * the BAR when the next unicast transmission on the
948 * same TID succeeds.
949 */
950 bar = (struct ieee80211_bar *) skb->data;
951 control = le16_to_cpu(bar->control);
952 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
953 u16 ssn = le16_to_cpu(bar->start_seq_num);
954
955 tid = (control &
956 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
957 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
958
959 ieee80211_set_bar_pending(sta, tid, ssn);
960 }
961 }
962
963 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
964 ieee80211_handle_filtered_frame(local, sta, skb);
965 return;
966 } else if (ieee80211_is_data_present(fc)) {
967 if (!acked && !noack_success)
968 sta->status_stats.msdu_failed[tid]++;
969
970 sta->status_stats.msdu_retries[tid] +=
971 retry_count;
972 }
973
974 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
975 ieee80211_frame_acked(sta, skb);
976
977 }
978
979 /* SNMP counters
980 * Fragments are passed to low-level drivers as separate skbs, so these
981 * are actually fragments, not frames. Update frame counters only for
982 * the first fragment of the frame. */
983 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
984 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
985 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
986 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
987 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
988 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
989 if (retry_count > 0)
990 I802_DEBUG_INC(local->dot11RetryCount);
991 if (retry_count > 1)
992 I802_DEBUG_INC(local->dot11MultipleRetryCount);
993 }
994
995 /* This counter shall be incremented for an acknowledged MPDU
996 * with an individual address in the address 1 field or an MPDU
997 * with a multicast address in the address 1 field of type Data
998 * or Management. */
999 if (!is_multicast_ether_addr(hdr->addr1) ||
1000 ieee80211_is_data(fc) ||
1001 ieee80211_is_mgmt(fc))
1002 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1003 } else {
1004 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1005 I802_DEBUG_INC(local->dot11FailedCount);
1006 }
1007
1008 if (ieee80211_is_any_nullfunc(fc) &&
1009 ieee80211_has_pm(fc) &&
1010 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1011 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1012 local->ps_sdata && !(local->scanning)) {
1013 if (info->flags & IEEE80211_TX_STAT_ACK) {
1014 local->ps_sdata->u.mgd.flags |=
1015 IEEE80211_STA_NULLFUNC_ACKED;
1016 } else
1017 mod_timer(&local->dynamic_ps_timer, jiffies +
1018 msecs_to_jiffies(10));
1019 }
1020
1021 ieee80211_report_used_skb(local, skb, false);
1022
1023 /* this was a transmitted frame, but now we want to reuse it */
1024 skb_orphan(skb);
1025
1026 /* Need to make a copy before skb->cb gets cleared */
1027 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1028 !(ieee80211_is_data(fc));
1029
1030 /*
1031 * This is a bit racy but we can avoid a lot of work
1032 * with this test...
1033 */
1034 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1035 if (status->free_list)
1036 list_add_tail(&skb->list, status->free_list);
1037 else
1038 dev_kfree_skb(skb);
1039 return;
1040 }
1041
1042 /* send to monitor interfaces */
1043 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1044 send_to_cooked, status);
1045 }
1046
ieee80211_tx_status(struct ieee80211_hw * hw,struct sk_buff * skb)1047 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1048 {
1049 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1050 struct ieee80211_local *local = hw_to_local(hw);
1051 struct ieee80211_tx_status status = {
1052 .skb = skb,
1053 .info = IEEE80211_SKB_CB(skb),
1054 };
1055 struct sta_info *sta;
1056
1057 rcu_read_lock();
1058
1059 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1060 if (sta)
1061 status.sta = &sta->sta;
1062
1063 ieee80211_tx_status_ext(hw, &status);
1064 rcu_read_unlock();
1065 }
1066 EXPORT_SYMBOL(ieee80211_tx_status);
1067
ieee80211_tx_status_ext(struct ieee80211_hw * hw,struct ieee80211_tx_status * status)1068 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1069 struct ieee80211_tx_status *status)
1070 {
1071 struct ieee80211_local *local = hw_to_local(hw);
1072 struct ieee80211_tx_info *info = status->info;
1073 struct ieee80211_sta *pubsta = status->sta;
1074 struct sk_buff *skb = status->skb;
1075 struct ieee80211_supported_band *sband;
1076 struct sta_info *sta = NULL;
1077 int rates_idx, retry_count;
1078 bool acked, noack_success;
1079 u16 tx_time_est;
1080
1081 if (pubsta) {
1082 sta = container_of(pubsta, struct sta_info, sta);
1083
1084 if (status->rate)
1085 sta->tx_stats.last_rate_info = *status->rate;
1086 }
1087
1088 if (skb && (tx_time_est =
1089 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1090 /* Do this here to avoid the expensive lookup of the sta
1091 * in ieee80211_report_used_skb().
1092 */
1093 ieee80211_sta_update_pending_airtime(local, sta,
1094 skb_get_queue_mapping(skb),
1095 tx_time_est,
1096 true);
1097 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1098 }
1099
1100 if (!status->info)
1101 goto free;
1102
1103 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1104
1105 sband = hw->wiphy->bands[info->band];
1106
1107 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1108 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1109
1110 if (pubsta) {
1111 struct ieee80211_sub_if_data *sdata = sta->sdata;
1112
1113 if (!acked && !noack_success)
1114 sta->status_stats.retry_failed++;
1115 sta->status_stats.retry_count += retry_count;
1116
1117 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1118 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1119 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1120 ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1121 acked, info->status.tx_time);
1122
1123 if (acked) {
1124 sta->status_stats.last_ack = jiffies;
1125
1126 if (sta->status_stats.lost_packets)
1127 sta->status_stats.lost_packets = 0;
1128
1129 /* Track when last packet was ACKed */
1130 sta->status_stats.last_pkt_time = jiffies;
1131
1132 /* Reset connection monitor */
1133 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1134 unlikely(sdata->u.mgd.probe_send_count > 0))
1135 sdata->u.mgd.probe_send_count = 0;
1136
1137 if (info->status.is_valid_ack_signal) {
1138 sta->status_stats.last_ack_signal =
1139 (s8)info->status.ack_signal;
1140 sta->status_stats.ack_signal_filled = true;
1141 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
1142 -info->status.ack_signal);
1143 }
1144 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1145 /*
1146 * The STA is in power save mode, so assume
1147 * that this TX packet failed because of that.
1148 */
1149 if (skb)
1150 ieee80211_handle_filtered_frame(local, sta, skb);
1151 return;
1152 } else if (noack_success) {
1153 /* nothing to do here, do not account as lost */
1154 } else {
1155 ieee80211_lost_packet(sta, info);
1156 }
1157 }
1158
1159 rate_control_tx_status(local, sband, status);
1160 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1161 ieee80211s_update_metric(local, sta, status);
1162 }
1163
1164 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1165 return __ieee80211_tx_status(hw, status, rates_idx,
1166 retry_count);
1167
1168 if (acked || noack_success) {
1169 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1170 if (!pubsta)
1171 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1172 if (retry_count > 0)
1173 I802_DEBUG_INC(local->dot11RetryCount);
1174 if (retry_count > 1)
1175 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1176 } else {
1177 I802_DEBUG_INC(local->dot11FailedCount);
1178 }
1179
1180 free:
1181 if (!skb)
1182 return;
1183
1184 ieee80211_report_used_skb(local, skb, false);
1185 if (status->free_list)
1186 list_add_tail(&skb->list, status->free_list);
1187 else
1188 dev_kfree_skb(skb);
1189 }
1190 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1191
ieee80211_tx_rate_update(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,struct ieee80211_tx_info * info)1192 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1193 struct ieee80211_sta *pubsta,
1194 struct ieee80211_tx_info *info)
1195 {
1196 struct ieee80211_local *local = hw_to_local(hw);
1197 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1198 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1199 struct ieee80211_tx_status status = {
1200 .info = info,
1201 .sta = pubsta,
1202 };
1203
1204 rate_control_tx_status(local, sband, &status);
1205
1206 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1207 sta->tx_stats.last_rate = info->status.rates[0];
1208 }
1209 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1210
ieee80211_tx_status_8023(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct sk_buff * skb)1211 void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1212 struct ieee80211_vif *vif,
1213 struct sk_buff *skb)
1214 {
1215 struct ieee80211_sub_if_data *sdata;
1216 struct ieee80211_tx_status status = {
1217 .skb = skb,
1218 .info = IEEE80211_SKB_CB(skb),
1219 };
1220 struct sta_info *sta;
1221
1222 sdata = vif_to_sdata(vif);
1223
1224 rcu_read_lock();
1225
1226 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta))
1227 status.sta = &sta->sta;
1228
1229 ieee80211_tx_status_ext(hw, &status);
1230
1231 rcu_read_unlock();
1232 }
1233 EXPORT_SYMBOL(ieee80211_tx_status_8023);
1234
ieee80211_report_low_ack(struct ieee80211_sta * pubsta,u32 num_packets)1235 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1236 {
1237 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1238 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1239 num_packets, GFP_ATOMIC);
1240 }
1241 EXPORT_SYMBOL(ieee80211_report_low_ack);
1242
ieee80211_free_txskb(struct ieee80211_hw * hw,struct sk_buff * skb)1243 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1244 {
1245 struct ieee80211_local *local = hw_to_local(hw);
1246
1247 ieee80211_report_used_skb(local, skb, true);
1248 dev_kfree_skb_any(skb);
1249 }
1250 EXPORT_SYMBOL(ieee80211_free_txskb);
1251
ieee80211_purge_tx_queue(struct ieee80211_hw * hw,struct sk_buff_head * skbs)1252 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1253 struct sk_buff_head *skbs)
1254 {
1255 struct sk_buff *skb;
1256
1257 while ((skb = __skb_dequeue(skbs)))
1258 ieee80211_free_txskb(hw, skb);
1259 }
1260
