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 #ifdef CONFIG_DRIVERS_HDF_XR829
21 extern void wal_netif_rx(struct sk_buff *skb);
22 #endif
23
mac80211_tx_status_irqsafe(struct ieee80211_hw * hw,struct sk_buff * skb)24 void mac80211_tx_status_irqsafe(struct ieee80211_hw *hw,
25 struct sk_buff *skb)
26 {
27 struct ieee80211_local *local = hw_to_local(hw);
28 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
29 int tmp;
30
31 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
32 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
33 &local->skb_queue : &local->skb_queue_unreliable, skb);
34 tmp = skb_queue_len(&local->skb_queue) +
35 skb_queue_len(&local->skb_queue_unreliable);
36 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
37 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
38 mac80211_free_txskb(hw, skb);
39 tmp--;
40 I802_DEBUG_INC(local->tx_status_drop);
41 }
42 tasklet_schedule(&local->tasklet);
43 }
44
ieee80211_handle_filtered_frame(struct ieee80211_local * local,struct sta_info * sta,struct sk_buff * skb)45 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
46 struct sta_info *sta,
47 struct sk_buff *skb)
48 {
49 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
50 struct ieee80211_hdr *hdr = (void *)skb->data;
51 int ac;
52
53 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
54 IEEE80211_TX_CTL_AMPDU)) {
55 mac80211_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->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
72 IEEE80211_TX_INTFL_RETRANSMISSION;
73 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
74
75 sta->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 mac80211_free_txskb(&local->hw, skb);
170 }
171
ieee80211_check_pending_bar(struct sta_info * sta,u8 * addr,u8 tid)172 static 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 mac80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
182 }
183
ieee80211_frame_acked(struct sta_info * sta,struct sk_buff * skb)184 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
185 {
186 struct ieee80211_mgmt *mgmt = (void *) skb->data;
187 struct ieee80211_local *local = sta->local;
188 struct ieee80211_sub_if_data *sdata = sta->sdata;
189 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
190
191 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
192 sta->status_stats.last_ack = jiffies;
193 if (txinfo->status.is_valid_ack_signal) {
194 sta->status_stats.last_ack_signal =
195 (s8)txinfo->status.ack_signal;
196 sta->status_stats.ack_signal_filled = true;
197 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
198 -txinfo->status.ack_signal);
199 }
200 }
201
202 if (ieee80211_is_data_qos(mgmt->frame_control)) {
203 struct ieee80211_hdr *hdr = (void *) skb->data;
204 u8 *qc = ieee80211_get_qos_ctl(hdr);
205 u16 tid = qc[0] & 0xf;
206
207 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
208 }
209
210 if (ieee80211_is_action(mgmt->frame_control) &&
211 !ieee80211_has_protected(mgmt->frame_control) &&
212 mgmt->u.action.category == WLAN_CATEGORY_HT &&
213 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
214 ieee80211_sdata_running(sdata)) {
215 enum ieee80211_smps_mode smps_mode;
216
217 switch (mgmt->u.action.u.ht_smps.smps_control) {
218 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
219 smps_mode = IEEE80211_SMPS_DYNAMIC;
220 break;
221 case WLAN_HT_SMPS_CONTROL_STATIC:
222 smps_mode = IEEE80211_SMPS_STATIC;
223 break;
224 case WLAN_HT_SMPS_CONTROL_DISABLED:
225 default: /* shouldn't happen since we don't send that */
226 smps_mode = IEEE80211_SMPS_OFF;
227 break;
228 }
229
230 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
231 /*
232 * This update looks racy, but isn't -- if we come
233 * here we've definitely got a station that we're
234 * talking to, and on a managed interface that can
235 * only be the AP. And the only other place updating
236 * this variable in managed mode is before association.
237 */
238 sdata->smps_mode = smps_mode;
239 mac80211_queue_work(&local->hw, &sdata->recalc_smps);
240 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
241 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
242 sta->known_smps_mode = smps_mode;
243 }
244 }
245 }
246
ieee80211_set_bar_pending(struct sta_info * sta,u8 tid,u16 ssn)247 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
248 {
249 struct tid_ampdu_tx *tid_tx;
250
251 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
252 if (!tid_tx)
253 return;
254
255 tid_tx->failed_bar_ssn = ssn;
256 tid_tx->bar_pending = true;
257 }
258
ieee80211_tx_radiotap_len(struct ieee80211_tx_info * info,struct ieee80211_tx_status * status)259 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
260 struct ieee80211_tx_status *status)
261 {
262 int len = sizeof(struct ieee80211_radiotap_header);
263
264 /* IEEE80211_RADIOTAP_RATE rate */
265 if (status && status->rate && !(status->rate->flags &
266 (RATE_INFO_FLAGS_MCS |
267 RATE_INFO_FLAGS_DMG |
268 RATE_INFO_FLAGS_EDMG |
269 RATE_INFO_FLAGS_VHT_MCS |
270 RATE_INFO_FLAGS_HE_MCS)))
271 len += 2;
272 else if (info->status.rates[0].idx >= 0 &&
273 !(info->status.rates[0].flags &
274 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
275 len += 2;
276
277 /* IEEE80211_RADIOTAP_TX_FLAGS */
278 len += 2;
279
280 /* IEEE80211_RADIOTAP_DATA_RETRIES */
281 len += 1;
282
283 /* IEEE80211_RADIOTAP_MCS
284 * IEEE80211_RADIOTAP_VHT */
285 if (status && status->rate) {
286 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
287 len += 3;
288 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
289 len = ALIGN(len, 2) + 12;
290 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
291 len = ALIGN(len, 2) + 12;
292 } else if (info->status.rates[0].idx >= 0) {
293 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
294 len += 3;
295 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
296 len = ALIGN(len, 2) + 12;
297 }
298
299 return len;
300 }
301
302 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)303 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
304 struct ieee80211_supported_band *sband,
305 struct sk_buff *skb, int retry_count,
306 int rtap_len, int shift,
307 struct ieee80211_tx_status *status)
308 {
309 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
310 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
311 struct ieee80211_radiotap_header *rthdr;
312 unsigned char *pos;
313 u16 legacy_rate = 0;
314 u16 txflags;
315
316 rthdr = skb_push(skb, rtap_len);
317
318 memset(rthdr, 0, rtap_len);
319 rthdr->it_len = cpu_to_le16(rtap_len);
320 rthdr->it_present =
321 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
322 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
323 pos = (unsigned char *)(rthdr + 1);
324
325 /*
326 * XXX: Once radiotap gets the bitmap reset thing the vendor
327 * extensions proposal contains, we can actually report
328 * the whole set of tries we did.
329 */
330
331 /* IEEE80211_RADIOTAP_RATE */
332
333 if (status && status->rate) {
334 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
335 RATE_INFO_FLAGS_DMG |
336 RATE_INFO_FLAGS_EDMG |
337 RATE_INFO_FLAGS_VHT_MCS |
338 RATE_INFO_FLAGS_HE_MCS)))
339 legacy_rate = status->rate->legacy;
340 } else if (info->status.rates[0].idx >= 0 &&
341 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
342 IEEE80211_TX_RC_VHT_MCS)))
343 legacy_rate =
344 sband->bitrates[info->status.rates[0].idx].bitrate;
345
346 if (legacy_rate) {
347 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
348 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
349 /* padding for tx flags */
350 pos += 2;
351 }
352
353 /* IEEE80211_RADIOTAP_TX_FLAGS */
354 txflags = 0;
355 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
356 !is_multicast_ether_addr(hdr->addr1))
357 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
358
359 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
360 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
361 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
362 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
363
364 put_unaligned_le16(txflags, pos);
365 pos += 2;
366
367 /* IEEE80211_RADIOTAP_DATA_RETRIES */
368 /* for now report the total retry_count */
369 *pos = retry_count;
370 pos++;
371
372 if (status && status->rate &&
373 (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
374 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
375 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
376 IEEE80211_RADIOTAP_MCS_HAVE_GI |
377 IEEE80211_RADIOTAP_MCS_HAVE_BW;
378 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
379 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
380 if (status->rate->bw == RATE_INFO_BW_40)
381 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
382 pos[2] = status->rate->mcs;
383 pos += 3;
384 } else if (status && status->rate &&
385 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
386 u16 known = local->hw.radiotap_vht_details &
387 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
388 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
389
390 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
391
392 /* required alignment from rthdr */
393 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
394
395 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
396 put_unaligned_le16(known, pos);
397 pos += 2;
398
399 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
400 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
401 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
402 pos++;
403
404 /* u8 bandwidth */
405 switch (status->rate->bw) {
406 case RATE_INFO_BW_160:
407 *pos = 11;
408 break;
409 case RATE_INFO_BW_80:
410 *pos = 4;
411 break;
412 case RATE_INFO_BW_40:
413 *pos = 1;
414 break;
415 default:
416 *pos = 0;
417 break;
418 }
419 pos++;
420
421 /* u8 mcs_nss[4] */
422 *pos = (status->rate->mcs << 4) | status->rate->nss;
423 pos += 4;
424
425 /* u8 coding */
426 pos++;
427 /* u8 group_id */
428 pos++;
429 /* u16 partial_aid */
430 pos += 2;
431 } else if (status && status->rate &&
432 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
433 struct ieee80211_radiotap_he *he;
434
435 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
436
437 /* required alignment from rthdr */
438 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
439 he = (struct ieee80211_radiotap_he *)pos;
440
441 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
442 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
443 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
444 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
445
446 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
447
448 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
449
450 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
451
452 #define CHECK_GI(s) \
453 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
454 (int)NL80211_RATE_INFO_HE_GI_##s)
455
456 CHECK_GI(0_8);
457 CHECK_GI(1_6);
458 CHECK_GI(3_2);
459
460 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
461 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
462
463 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
464
465 switch (status->rate->bw) {
466 case RATE_INFO_BW_20:
467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
469 break;
470 case RATE_INFO_BW_40:
471 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
472 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
473 break;
474 case RATE_INFO_BW_80:
475 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
476 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
477 break;
478 case RATE_INFO_BW_160:
479 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
480 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
481 break;
482 case RATE_INFO_BW_HE_RU:
483 #define CHECK_RU_ALLOC(s) \
484 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
485 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
486
487 CHECK_RU_ALLOC(26);
488 CHECK_RU_ALLOC(52);
489 CHECK_RU_ALLOC(106);
490 CHECK_RU_ALLOC(242);
491 CHECK_RU_ALLOC(484);
492 CHECK_RU_ALLOC(996);
493 CHECK_RU_ALLOC(2x996);
494
495 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
496 status->rate->he_ru_alloc + 4);
497 break;
498 default:
499 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
500 }
501
502 pos += sizeof(struct ieee80211_radiotap_he);
503 }
504
505 if ((status && status->rate) || info->status.rates[0].idx < 0)
506 return;
507
508 /* IEEE80211_RADIOTAP_MCS
509 * IEEE80211_RADIOTAP_VHT */
510 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
511 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
512 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
513 IEEE80211_RADIOTAP_MCS_HAVE_GI |
514 IEEE80211_RADIOTAP_MCS_HAVE_BW;
515 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
516 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
517 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
518 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
519 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
520 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
521 pos[2] = info->status.rates[0].idx;
522 pos += 3;
523 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
524 u16 known = local->hw.radiotap_vht_details &
525 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
526 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
527
528 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
529
530 /* required alignment from rthdr */
531 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
532
533 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
534 put_unaligned_le16(known, pos);
535 pos += 2;
536
537 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
538 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
539 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
540 pos++;
541
542 /* u8 bandwidth */
543 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
544 *pos = 1;
545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
546 *pos = 4;
547 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
548 *pos = 11;
549 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
550 *pos = 0;
551 pos++;
552
553 /* u8 mcs_nss[4] */
554 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
555 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
556 pos += 4;
557
558 /* u8 coding */
559 pos++;
560 /* u8 group_id */
561 pos++;
562 /* u16 partial_aid */
563 pos += 2;
564 }
565 }
566
567 /*
568 * Handles the tx for TDLS teardown frames.
569 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
570 */
ieee80211_tdls_td_tx_handle(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u32 flags)571 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 struct sk_buff *skb, u32 flags)
574 {
575 struct sk_buff *teardown_skb;
576 struct sk_buff *orig_teardown_skb;
577 bool is_teardown = false;
578
579 /* Get the teardown data we need and free the lock */
580 spin_lock(&sdata->u.mgd.teardown_lock);
581 teardown_skb = sdata->u.mgd.teardown_skb;
582 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
583 if ((skb == orig_teardown_skb) && teardown_skb) {
584 sdata->u.mgd.teardown_skb = NULL;
585 sdata->u.mgd.orig_teardown_skb = NULL;
586 is_teardown = true;
587 }
588 spin_unlock(&sdata->u.mgd.teardown_lock);
589
590 if (is_teardown) {
591 /* This mechanism relies on being able to get ACKs */
592 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
593
594 /* Check if peer has ACKed */
595 if (flags & IEEE80211_TX_STAT_ACK) {
596 dev_kfree_skb_any(teardown_skb);
597 } else {
598 tdls_dbg(sdata,
599 "TDLS Resending teardown through AP\n");
600
601 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
602 }
603 }
604 }
605
606 static struct ieee80211_sub_if_data *
ieee80211_sdata_from_skb(struct ieee80211_local * local,struct sk_buff * skb)607 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
608 {
609 struct ieee80211_sub_if_data *sdata;
610
611 if (skb->dev) {
612 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
613 if (!sdata->dev)
614 continue;
615
616 if (skb->dev == sdata->dev)
617 return sdata;
618 }
619
620 return NULL;
621 }
622
623 return rcu_dereference(local->p2p_sdata);
624 }
625
ieee80211_report_ack_skb(struct ieee80211_local * local,struct ieee80211_tx_info * info,bool acked,bool dropped)626 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
627 struct ieee80211_tx_info *info,
628 bool acked, bool dropped)
629 {
630 struct sk_buff *skb;
631 unsigned long flags;
632
633 spin_lock_irqsave(&local->ack_status_lock, flags);
634 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
635 spin_unlock_irqrestore(&local->ack_status_lock, flags);
636
637 if (!skb)
638 return;
639
640 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
641 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
642 struct ieee80211_sub_if_data *sdata;
643 struct ieee80211_hdr *hdr = (void *)skb->data;
644
645 rcu_read_lock();
646 sdata = ieee80211_sdata_from_skb(local, skb);
647 if (sdata) {
648 if (ieee80211_is_any_nullfunc(hdr->frame_control))
649 cfg80211_probe_status(sdata->dev, hdr->addr1,
650 cookie, acked,
651 info->status.ack_signal,
652 info->status.is_valid_ack_signal,
653 GFP_ATOMIC);
654 else
655 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
656 skb->data, skb->len,
657 acked, GFP_ATOMIC);
658 }
659 rcu_read_unlock();
660
661 dev_kfree_skb_any(skb);
662 } else if (dropped) {
663 dev_kfree_skb_any(skb);
664 } else {
665 /* consumes skb */
666 skb_complete_wifi_ack(skb, acked);
667 }
668 }
669
ieee80211_report_used_skb(struct ieee80211_local * local,struct sk_buff * skb,bool dropped)670 static void ieee80211_report_used_skb(struct ieee80211_local *local,
671 struct sk_buff *skb, bool dropped)
672 {
673 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
674 struct ieee80211_hdr *hdr = (void *)skb->data;
675 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
676
677 if (dropped)
678 acked = false;
679
680 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
681 struct ieee80211_sub_if_data *sdata;
682
683 rcu_read_lock();
684
685 sdata = ieee80211_sdata_from_skb(local, skb);
686
687 if (!sdata) {
688 skb->dev = NULL;
689 } else {
690 unsigned int hdr_size =
691 ieee80211_hdrlen(hdr->frame_control);
692
693 /* Check to see if packet is a TDLS teardown packet */
694 if (ieee80211_is_data(hdr->frame_control) &&
695 (ieee80211_get_tdls_action(skb, hdr_size) ==
696 WLAN_TDLS_TEARDOWN))
697 ieee80211_tdls_td_tx_handle(local, sdata, skb,
698 info->flags);
699 else
700 ieee80211_mgd_conn_tx_status(sdata,
701 hdr->frame_control,
702 acked);
703 }
704
705 rcu_read_unlock();
706 } else if (info->ack_frame_id) {
707 ieee80211_report_ack_skb(local, info, acked, dropped);
708 }
709
710 if (!dropped && skb->destructor) {
711 skb->wifi_acked_valid = 1;
712 skb->wifi_acked = acked;
713 }
714
715 ieee80211_led_tx(local);
716
717 if (skb_has_frag_list(skb)) {
718 kfree_skb_list(skb_shinfo(skb)->frag_list);
719 skb_shinfo(skb)->frag_list = NULL;
720 }
721 }
722
723 /*
724 * Use a static threshold for now, best value to be determined
725 * by testing ...
726 * Should it depend on:
727 * - on # of retransmissions
728 * - current throughput (higher value for higher tpt)?
729 */
730 #define STA_LOST_PKT_THRESHOLD 50
731 #define STA_LOST_TDLS_PKT_THRESHOLD 10
732 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
733
ieee80211_lost_packet(struct sta_info * sta,struct ieee80211_tx_info * info)734 static void ieee80211_lost_packet(struct sta_info *sta,
735 struct ieee80211_tx_info *info)
736 {
737 /* If driver relies on its own algorithm for station kickout, skip
738 * mac80211 packet loss mechanism.
739 */
740 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
741 return;
742
743 /* This packet was aggregated but doesn't carry status info */
744 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
745 !(info->flags & IEEE80211_TX_STAT_AMPDU))
746 return;
747
748 sta->status_stats.lost_packets++;
749 if (!sta->sta.tdls &&
750 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
751 return;
752
753 /*
754 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
755 * of the last packets were lost, and that no ACK was received in the
756 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
757 * mechanism.
758 */
759 if (sta->sta.tdls &&
760 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
761 time_before(jiffies,
762 sta->status_stats.last_tdls_pkt_time +
763 STA_LOST_TDLS_PKT_TIME)))
764 return;
765
766 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
767 sta->status_stats.lost_packets, GFP_ATOMIC);
768 sta->status_stats.lost_packets = 0;
769 }
770
ieee80211_tx_get_rates(struct ieee80211_hw * hw,struct ieee80211_tx_info * info,int * retry_count)771 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
772 struct ieee80211_tx_info *info,
773 int *retry_count)
774 {
775 int rates_idx = -1;
776 int count = -1;
777 int i;
778
779 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
780 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
781 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
782 /* just the first aggr frame carry status info */
783 info->status.rates[i].idx = -1;
784 info->status.rates[i].count = 0;
785 break;
786 } else if (info->status.rates[i].idx < 0) {
787 break;
788 } else if (i >= hw->max_report_rates) {
789 /* the HW cannot have attempted that rate */
790 info->status.rates[i].idx = -1;
791 info->status.rates[i].count = 0;
792 break;
793 }
794
795 count += info->status.rates[i].count;
796 }
797 rates_idx = i - 1;
798
799 if (count < 0)
800 count = 0;
801
802 *retry_count = count;
803 return rates_idx;
804 }
805
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)806 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
807 struct ieee80211_supported_band *sband,
808 int retry_count, int shift, bool send_to_cooked,
809 struct ieee80211_tx_status *status)
810 {
811 struct sk_buff *skb2;
812 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
813 struct ieee80211_sub_if_data *sdata;
814 struct net_device *prev_dev = NULL;
815 int rtap_len;
816
817 /* send frame to monitor interfaces now */
818 rtap_len = ieee80211_tx_radiotap_len(info, status);
819 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
820 pr_err("ieee80211_tx_status: headroom too small\n");
821 dev_kfree_skb(skb);
822 return;
823 }
824 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
825 rtap_len, shift, status);
826
827 /* XXX: is this sufficient for BPF? */
828 skb_reset_mac_header(skb);
829 skb->ip_summed = CHECKSUM_UNNECESSARY;
830 skb->pkt_type = PACKET_OTHERHOST;
831 skb->protocol = htons(ETH_P_802_2);
832 memset(skb->cb, 0, sizeof(skb->cb));
833
834 rcu_read_lock();
835 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
836 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
837 if (!ieee80211_sdata_running(sdata))
838 continue;
839
840 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
841 !send_to_cooked)
842 continue;
843
844 if (prev_dev) {
845 skb2 = skb_clone(skb, GFP_ATOMIC);
846 if (skb2) {
847 skb2->dev = prev_dev;
848 #ifndef CONFIG_DRIVERS_HDF_XR829
849 netif_rx(skb2);
850 #else
851 wal_netif_rx(skb2);
852 #endif
853 }
854 }
855
856 prev_dev = sdata->dev;
857 }
858 }
859 if (prev_dev) {
860 skb->dev = prev_dev;
861 #ifndef CONFIG_DRIVERS_HDF_XR829
862 netif_rx(skb);
863 #else
864 wal_netif_rx(skb);
865 #endif
866 skb = NULL;
867 }
868 rcu_read_unlock();
869 dev_kfree_skb(skb);
870 }
871
__ieee80211_tx_status(struct ieee80211_hw * hw,struct ieee80211_tx_status * status)872 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
873 struct ieee80211_tx_status *status)
874 {
875 struct sk_buff *skb = status->skb;
876 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
877 struct ieee80211_local *local = hw_to_local(hw);
878 struct ieee80211_tx_info *info = status->info;
879 struct sta_info *sta;
880 __le16 fc;
881 struct ieee80211_supported_band *sband;
882 int retry_count;
883 int rates_idx;
884 bool send_to_cooked;
885 bool acked;
886 struct ieee80211_bar *bar;
887 int shift = 0;
888 int tid = IEEE80211_NUM_TIDS;
889
890 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
891
892 sband = local->hw.wiphy->bands[info->band];
893 fc = hdr->frame_control;
894
895 if (status->sta) {
896 sta = container_of(status->sta, struct sta_info, sta);
897 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
898
899 if (info->flags & IEEE80211_TX_STATUS_EOSP)
900 clear_sta_flag(sta, WLAN_STA_SP);
901
902 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
903
904 /* mesh Peer Service Period support */
905 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
906 ieee80211_is_data_qos(fc))
907 ieee80211_mpsp_trigger_process(
908 ieee80211_get_qos_ctl(hdr), sta, true, acked);
909
910 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
911 /*
912 * The STA is in power save mode, so assume
913 * that this TX packet failed because of that.
914 */
915 ieee80211_handle_filtered_frame(local, sta, skb);
916 return;
917 }
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 mac80211_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 {
967 if (!acked)
968 sta->status_stats.retry_failed++;
969 sta->status_stats.retry_count += retry_count;
970
971 if (ieee80211_is_data_present(fc)) {
972 if (!acked)
973 sta->status_stats.msdu_failed[tid]++;
974
975 sta->status_stats.msdu_retries[tid] +=
976 retry_count;
977 }
978 }
979
980 rate_control_tx_status(local, sband, status);
981 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
982 ieee80211s_update_metric(local, sta, status);
983
984 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
985 ieee80211_frame_acked(sta, skb);
986
987 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
988 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
989 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
990 acked, info->status.tx_time);
991
992 if (info->status.tx_time &&
993 wiphy_ext_feature_isset(local->hw.wiphy,
994 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
995 mac80211_sta_register_airtime(&sta->sta, tid,
996 info->status.tx_time, 0);
997
998 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
999 if (info->flags & IEEE80211_TX_STAT_ACK) {
1000 if (sta->status_stats.lost_packets)
1001 sta->status_stats.lost_packets = 0;
1002
1003 /* Track when last TDLS packet was ACKed */
1004 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1005 sta->status_stats.last_tdls_pkt_time =
1006 jiffies;
1007 } else {
1008 ieee80211_lost_packet(sta, info);
1009 }
1010 }
1011 }
1012
1013 /* SNMP counters
1014 * Fragments are passed to low-level drivers as separate skbs, so these
1015 * are actually fragments, not frames. Update frame counters only for
1016 * the first fragment of the frame. */
1017 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1018 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1019 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1020 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1021 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1022 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1023 if (retry_count > 0)
1024 I802_DEBUG_INC(local->dot11RetryCount);
1025 if (retry_count > 1)
1026 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1027 }
1028
1029 /* This counter shall be incremented for an acknowledged MPDU
1030 * with an individual address in the address 1 field or an MPDU
1031 * with a multicast address in the address 1 field of type Data
1032 * or Management. */
1033 if (!is_multicast_ether_addr(hdr->addr1) ||
1034 ieee80211_is_data(fc) ||
1035 ieee80211_is_mgmt(fc))
1036 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1037 } else {
1038 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1039 I802_DEBUG_INC(local->dot11FailedCount);
1040 }
1041
1042 if (ieee80211_is_any_nullfunc(fc) &&
1043 ieee80211_has_pm(fc) &&
1044 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1045 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1046 local->ps_sdata && !(local->scanning)) {
1047 if (info->flags & IEEE80211_TX_STAT_ACK) {
1048 local->ps_sdata->u.mgd.flags |=
1049 IEEE80211_STA_NULLFUNC_ACKED;
1050 } else
1051 mod_timer(&local->dynamic_ps_timer, jiffies +
1052 msecs_to_jiffies(10));
1053 }
1054
1055 ieee80211_report_used_skb(local, skb, false);
1056
1057 /* this was a transmitted frame, but now we want to reuse it */
1058 skb_orphan(skb);
1059
1060 /* Need to make a copy before skb->cb gets cleared */
1061 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1062 !(ieee80211_is_data(fc));
1063
1064 /*
1065 * This is a bit racy but we can avoid a lot of work
1066 * with this test...
1067 */
1068 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1069 dev_kfree_skb(skb);
1070 return;
1071 }
1072
1073 /* send to monitor interfaces */
1074 ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1075 send_to_cooked, status);
1076 }
1077
mac80211_tx_status(struct ieee80211_hw * hw,struct sk_buff * skb)1078 void mac80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1079 {
1080 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1081 struct ieee80211_local *local = hw_to_local(hw);
1082 struct ieee80211_tx_status status = {
1083 .skb = skb,
1084 .info = IEEE80211_SKB_CB(skb),
1085 };
1086 struct rhlist_head *tmp;
1087 struct sta_info *sta;
1088
1089 rcu_read_lock();
1090
1091 for_each_sta_info(local, hdr->addr1, sta, tmp) {
1092 /* skip wrong virtual interface */
1093 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
1094 continue;
1095
1096 status.sta = &sta->sta;
1097 break;
1098 }
1099
1100 __ieee80211_tx_status(hw, &status);
1101 rcu_read_unlock();
1102 }
1103
mac80211_tx_status_ext(struct ieee80211_hw * hw,struct ieee80211_tx_status * status)1104 void mac80211_tx_status_ext(struct ieee80211_hw *hw,
1105 struct ieee80211_tx_status *status)
1106 {
1107 struct ieee80211_local *local = hw_to_local(hw);
1108 struct ieee80211_tx_info *info = status->info;
1109 struct ieee80211_sta *pubsta = status->sta;
1110 struct ieee80211_supported_band *sband;
1111 int retry_count;
1112 bool acked, noack_success;
1113
1114 if (status->skb)
1115 return __ieee80211_tx_status(hw, status);
1116
1117 if (!status->sta)
1118 return;
1119
1120 ieee80211_tx_get_rates(hw, info, &retry_count);
1121
1122 sband = hw->wiphy->bands[info->band];
1123
1124 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1125 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1126
1127 if (pubsta) {
1128 struct sta_info *sta;
1129
1130 sta = container_of(pubsta, struct sta_info, sta);
1131
1132 if (!acked)
1133 sta->status_stats.retry_failed++;
1134 sta->status_stats.retry_count += retry_count;
1135
1136 if (acked) {
1137 sta->status_stats.last_ack = jiffies;
1138
1139 if (sta->status_stats.lost_packets)
1140 sta->status_stats.lost_packets = 0;
1141
1142 /* Track when last TDLS packet was ACKed */
1143 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1144 sta->status_stats.last_tdls_pkt_time = jiffies;
1145 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1146 return;
1147 } else {
1148 ieee80211_lost_packet(sta, info);
1149 }
1150
1151 rate_control_tx_status(local, sband, status);
1152 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1153 ieee80211s_update_metric(local, sta, status);
1154 }
1155
1156 if (acked || noack_success) {
1157 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1158 if (!pubsta)
1159 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1160 if (retry_count > 0)
1161 I802_DEBUG_INC(local->dot11RetryCount);
1162 if (retry_count > 1)
1163 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1164 } else {
1165 I802_DEBUG_INC(local->dot11FailedCount);
1166 }
1167 }
1168
mac80211_tx_rate_update(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,struct ieee80211_tx_info * info)1169 void mac80211_tx_rate_update(struct ieee80211_hw *hw,
1170 struct ieee80211_sta *pubsta,
1171 struct ieee80211_tx_info *info)
1172 {
1173 struct ieee80211_local *local = hw_to_local(hw);
1174 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1175 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1176 struct ieee80211_tx_status status = {
1177 .info = info,
1178 .sta = pubsta,
1179 };
1180
1181 rate_control_tx_status(local, sband, &status);
1182
1183 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1184 sta->tx_stats.last_rate = info->status.rates[0];
1185 }
1186
mac80211_report_low_ack(struct ieee80211_sta * pubsta,u32 num_packets)1187 void mac80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1188 {
1189 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1190 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1191 num_packets, GFP_ATOMIC);
1192 }
1193
mac80211_free_txskb(struct ieee80211_hw * hw,struct sk_buff * skb)1194 void mac80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1195 {
1196 struct ieee80211_local *local = hw_to_local(hw);
1197
1198 ieee80211_report_used_skb(local, skb, true);
1199 dev_kfree_skb_any(skb);
1200 }
1201
ieee80211_purge_tx_queue(struct ieee80211_hw * hw,struct sk_buff_head * skbs)1202 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1203 struct sk_buff_head *skbs)
1204 {
1205 struct sk_buff *skb;
1206
1207 while ((skb = __skb_dequeue(skbs)))
1208 mac80211_free_txskb(hw, skb);
1209 }
1210