1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright 2021-2022 Intel Corporation
9 */
10
11 #include <linux/export.h>
12 #include <linux/etherdevice.h>
13 #include <net/mac80211.h>
14 #include <asm/unaligned.h>
15 #include "ieee80211_i.h"
16 #include "rate.h"
17 #include "mesh.h"
18 #include "led.h"
19 #include "wme.h"
20
21
ieee80211_tx_status_irqsafe(struct ieee80211_hw * hw,struct sk_buff * skb)22 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
23 struct sk_buff *skb)
24 {
25 struct ieee80211_local *local = hw_to_local(hw);
26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
27 int tmp;
28
29 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
30 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
31 &local->skb_queue : &local->skb_queue_unreliable, skb);
32 tmp = skb_queue_len(&local->skb_queue) +
33 skb_queue_len(&local->skb_queue_unreliable);
34 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
35 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
36 ieee80211_free_txskb(hw, skb);
37 tmp--;
38 I802_DEBUG_INC(local->tx_status_drop);
39 }
40 tasklet_schedule(&local->tasklet);
41 }
42 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
43
ieee80211_handle_filtered_frame(struct ieee80211_local * local,struct sta_info * sta,struct sk_buff * skb)44 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
45 struct sta_info *sta,
46 struct sk_buff *skb)
47 {
48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
49 struct ieee80211_hdr *hdr = (void *)skb->data;
50 int ac;
51
52 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
53 IEEE80211_TX_CTL_AMPDU |
54 IEEE80211_TX_CTL_HW_80211_ENCAP)) {
55 ieee80211_free_txskb(&local->hw, skb);
56 return;
57 }
58
59 /*
60 * This skb 'survived' a round-trip through the driver, and
61 * hopefully the driver didn't mangle it too badly. However,
62 * we can definitely not rely on the control information
63 * being correct. Clear it so we don't get junk there, and
64 * indicate that it needs new processing, but must not be
65 * modified/encrypted again.
66 */
67 memset(&info->control, 0, sizeof(info->control));
68
69 info->control.jiffies = jiffies;
70 info->control.vif = &sta->sdata->vif;
71 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
72 info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION;
73 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
74
75 sta->deflink.status_stats.filtered++;
76
77 /*
78 * Clear more-data bit on filtered frames, it might be set
79 * but later frames might time out so it might have to be
80 * clear again ... It's all rather unlikely (this frame
81 * should time out first, right?) but let's not confuse
82 * peers unnecessarily.
83 */
84 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
85 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
86
87 if (ieee80211_is_data_qos(hdr->frame_control)) {
88 u8 *p = ieee80211_get_qos_ctl(hdr);
89 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
90
91 /*
92 * Clear EOSP if set, this could happen e.g.
93 * if an absence period (us being a P2P GO)
94 * shortens the SP.
95 */
96 if (*p & IEEE80211_QOS_CTL_EOSP)
97 *p &= ~IEEE80211_QOS_CTL_EOSP;
98 ac = ieee80211_ac_from_tid(tid);
99 } else {
100 ac = IEEE80211_AC_BE;
101 }
102
103 /*
104 * Clear the TX filter mask for this STA when sending the next
105 * packet. If the STA went to power save mode, this will happen
106 * when it wakes up for the next time.
107 */
108 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
109 ieee80211_clear_fast_xmit(sta);
110
111 /*
112 * This code races in the following way:
113 *
114 * (1) STA sends frame indicating it will go to sleep and does so
115 * (2) hardware/firmware adds STA to filter list, passes frame up
116 * (3) hardware/firmware processes TX fifo and suppresses a frame
117 * (4) we get TX status before having processed the frame and
118 * knowing that the STA has gone to sleep.
119 *
120 * This is actually quite unlikely even when both those events are
121 * processed from interrupts coming in quickly after one another or
122 * even at the same time because we queue both TX status events and
123 * RX frames to be processed by a tasklet and process them in the
124 * same order that they were received or TX status last. Hence, there
125 * is no race as long as the frame RX is processed before the next TX
126 * status, which drivers can ensure, see below.
127 *
128 * Note that this can only happen if the hardware or firmware can
129 * actually add STAs to the filter list, if this is done by the
130 * driver in response to set_tim() (which will only reduce the race
131 * this whole filtering tries to solve, not completely solve it)
132 * this situation cannot happen.
133 *
134 * To completely solve this race drivers need to make sure that they
135 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
136 * functions and
137 * (b) always process RX events before TX status events if ordering
138 * can be unknown, for example with different interrupt status
139 * bits.
140 * (c) if PS mode transitions are manual (i.e. the flag
141 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
142 * changes before calling TX status events if ordering can be
143 * unknown.
144 */
145 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
146 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
147 skb_queue_tail(&sta->tx_filtered[ac], skb);
148 sta_info_recalc_tim(sta);
149
150 if (!timer_pending(&local->sta_cleanup))
151 mod_timer(&local->sta_cleanup,
152 round_jiffies(jiffies +
153 STA_INFO_CLEANUP_INTERVAL));
154 return;
155 }
156
157 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
158 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
159 /* Software retry the packet once */
160 info->flags |= IEEE80211_TX_INTFL_RETRIED;
161 ieee80211_add_pending_skb(local, skb);
162 return;
163 }
164
165 ps_dbg_ratelimited(sta->sdata,
166 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
167 skb_queue_len(&sta->tx_filtered[ac]),
168 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
169 ieee80211_free_txskb(&local->hw, skb);
170 }
171
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 ieee80211_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
190 if (ieee80211_is_data_qos(mgmt->frame_control)) {
191 struct ieee80211_hdr *hdr = (void *) skb->data;
192 u8 *qc = ieee80211_get_qos_ctl(hdr);
193 u16 tid = qc[0] & 0xf;
194
195 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
196 }
197
198 if (ieee80211_is_action(mgmt->frame_control) &&
199 !ieee80211_has_protected(mgmt->frame_control) &&
200 mgmt->u.action.category == WLAN_CATEGORY_HT &&
201 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
202 ieee80211_sdata_running(sdata)) {
203 enum ieee80211_smps_mode smps_mode;
204
205 switch (mgmt->u.action.u.ht_smps.smps_control) {
206 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
207 smps_mode = IEEE80211_SMPS_DYNAMIC;
208 break;
209 case WLAN_HT_SMPS_CONTROL_STATIC:
210 smps_mode = IEEE80211_SMPS_STATIC;
211 break;
212 case WLAN_HT_SMPS_CONTROL_DISABLED:
213 default: /* shouldn't happen since we don't send that */
214 smps_mode = IEEE80211_SMPS_OFF;
215 break;
216 }
217
218 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
219 /*
220 * This update looks racy, but isn't -- if we come
221 * here we've definitely got a station that we're
222 * talking to, and on a managed interface that can
223 * only be the AP. And the only other place updating
224 * this variable in managed mode is before association.
225 */
226 sdata->deflink.smps_mode = smps_mode;
227 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
228 }
229 }
230 }
231
ieee80211_set_bar_pending(struct sta_info * sta,u8 tid,u16 ssn)232 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
233 {
234 struct tid_ampdu_tx *tid_tx;
235
236 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
237 if (!tid_tx)
238 return;
239
240 tid_tx->failed_bar_ssn = ssn;
241 tid_tx->bar_pending = true;
242 }
243
ieee80211_tx_radiotap_len(struct ieee80211_tx_info * info,struct ieee80211_tx_status * status)244 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
245 struct ieee80211_tx_status *status)
246 {
247 struct ieee80211_rate_status *status_rate = NULL;
248 int len = sizeof(struct ieee80211_radiotap_header);
249
250 if (status && status->n_rates)
251 status_rate = &status->rates[status->n_rates - 1];
252
253 /* IEEE80211_RADIOTAP_RATE rate */
254 if (status_rate && !(status_rate->rate_idx.flags &
255 (RATE_INFO_FLAGS_MCS |
256 RATE_INFO_FLAGS_DMG |
257 RATE_INFO_FLAGS_EDMG |
258 RATE_INFO_FLAGS_VHT_MCS |
259 RATE_INFO_FLAGS_HE_MCS)))
260 len += 2;
261 else if (info->status.rates[0].idx >= 0 &&
262 !(info->status.rates[0].flags &
263 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
264 len += 2;
265
266 /* IEEE80211_RADIOTAP_TX_FLAGS */
267 len += 2;
268
269 /* IEEE80211_RADIOTAP_DATA_RETRIES */
270 len += 1;
271
272 /* IEEE80211_RADIOTAP_MCS
273 * IEEE80211_RADIOTAP_VHT */
274 if (status_rate) {
275 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)
276 len += 3;
277 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS)
278 len = ALIGN(len, 2) + 12;
279 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS)
280 len = ALIGN(len, 2) + 12;
281 } else if (info->status.rates[0].idx >= 0) {
282 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
283 len += 3;
284 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
285 len = ALIGN(len, 2) + 12;
286 }
287
288 return len;
289 }
290
291 static void
ieee80211_add_tx_radiotap_header(struct ieee80211_local * local,struct sk_buff * skb,int retry_count,int rtap_len,int shift,struct ieee80211_tx_status * status)292 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
293 struct sk_buff *skb, int retry_count,
294 int rtap_len, int shift,
295 struct ieee80211_tx_status *status)
296 {
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
299 struct ieee80211_radiotap_header *rthdr;
300 struct ieee80211_rate_status *status_rate = NULL;
301 unsigned char *pos;
302 u16 legacy_rate = 0;
303 u16 txflags;
304
305 if (status && status->n_rates)
306 status_rate = &status->rates[status->n_rates - 1];
307
308 rthdr = skb_push(skb, rtap_len);
309
310 memset(rthdr, 0, rtap_len);
311 rthdr->it_len = cpu_to_le16(rtap_len);
312 rthdr->it_present =
313 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) |
314 BIT(IEEE80211_RADIOTAP_DATA_RETRIES));
315 pos = (unsigned char *)(rthdr + 1);
316
317 /*
318 * XXX: Once radiotap gets the bitmap reset thing the vendor
319 * extensions proposal contains, we can actually report
320 * the whole set of tries we did.
321 */
322
323 /* IEEE80211_RADIOTAP_RATE */
324
325 if (status_rate) {
326 if (!(status_rate->rate_idx.flags &
327 (RATE_INFO_FLAGS_MCS |
328 RATE_INFO_FLAGS_DMG |
329 RATE_INFO_FLAGS_EDMG |
330 RATE_INFO_FLAGS_VHT_MCS |
331 RATE_INFO_FLAGS_HE_MCS)))
332 legacy_rate = status_rate->rate_idx.legacy;
333 } else if (info->status.rates[0].idx >= 0 &&
334 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
335 IEEE80211_TX_RC_VHT_MCS))) {
336 struct ieee80211_supported_band *sband;
337
338 sband = local->hw.wiphy->bands[info->band];
339 legacy_rate =
340 sband->bitrates[info->status.rates[0].idx].bitrate;
341 }
342
343 if (legacy_rate) {
344 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
345 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
346 /* padding for tx flags */
347 pos += 2;
348 }
349
350 /* IEEE80211_RADIOTAP_TX_FLAGS */
351 txflags = 0;
352 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
353 !is_multicast_ether_addr(hdr->addr1))
354 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
355
356 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
357 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
358 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
359 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
360
361 put_unaligned_le16(txflags, pos);
362 pos += 2;
363
364 /* IEEE80211_RADIOTAP_DATA_RETRIES */
365 /* for now report the total retry_count */
366 *pos = retry_count;
367 pos++;
368
369 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS))
370 {
371 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
372 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
373 IEEE80211_RADIOTAP_MCS_HAVE_GI |
374 IEEE80211_RADIOTAP_MCS_HAVE_BW;
375 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
376 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
377 if (status_rate->rate_idx.bw == RATE_INFO_BW_40)
378 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
379 pos[2] = status_rate->rate_idx.mcs;
380 pos += 3;
381 } else if (status_rate && (status_rate->rate_idx.flags &
382 RATE_INFO_FLAGS_VHT_MCS))
383 {
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(BIT(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->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
400 pos++;
401
402 /* u8 bandwidth */
403 switch (status_rate->rate_idx.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->rate_idx.mcs << 4) |
421 status_rate->rate_idx.nss;
422 pos += 4;
423
424 /* u8 coding */
425 pos++;
426 /* u8 group_id */
427 pos++;
428 /* u16 partial_aid */
429 pos += 2;
430 } else if (status_rate && (status_rate->rate_idx.flags &
431 RATE_INFO_FLAGS_HE_MCS))
432 {
433 struct ieee80211_radiotap_he *he;
434
435 rthdr->it_present |= cpu_to_le32(BIT(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->rate_idx.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->rate_idx.mcs);
461 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm);
462
463 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi);
464
465 switch (status_rate->rate_idx.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->rate_idx.he_ru_alloc + 4);
497 break;
498 default:
499 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw);
500 }
501
502 pos += sizeof(struct ieee80211_radiotap_he);
503 }
504
505 if (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(BIT(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(BIT(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 sk_buff * orig_skb,bool acked,bool dropped,ktime_t ack_hwtstamp)626 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
627 struct sk_buff *orig_skb,
628 bool acked, bool dropped,
629 ktime_t ack_hwtstamp)
630 {
631 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb);
632 struct sk_buff *skb;
633 unsigned long flags;
634
635 spin_lock_irqsave(&local->ack_status_lock, flags);
636 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
637 spin_unlock_irqrestore(&local->ack_status_lock, flags);
638
639 if (!skb)
640 return;
641
642 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
643 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
644 struct ieee80211_sub_if_data *sdata;
645 struct ieee80211_hdr *hdr = (void *)skb->data;
646 bool is_valid_ack_signal =
647 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
648 struct cfg80211_tx_status status = {
649 .cookie = cookie,
650 .buf = skb->data,
651 .len = skb->len,
652 .ack = acked,
653 };
654
655 if (ieee80211_is_timing_measurement(orig_skb) ||
656 ieee80211_is_ftm(orig_skb)) {
657 status.tx_tstamp =
658 ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp);
659 status.ack_tstamp = ktime_to_ns(ack_hwtstamp);
660 }
661
662 rcu_read_lock();
663 sdata = ieee80211_sdata_from_skb(local, skb);
664 if (sdata) {
665 if (skb->protocol == sdata->control_port_protocol ||
666 skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
667 cfg80211_control_port_tx_status(&sdata->wdev,
668 cookie,
669 skb->data,
670 skb->len,
671 acked,
672 GFP_ATOMIC);
673 else if (ieee80211_is_any_nullfunc(hdr->frame_control))
674 cfg80211_probe_status(sdata->dev, hdr->addr1,
675 cookie, acked,
676 info->status.ack_signal,
677 is_valid_ack_signal,
678 GFP_ATOMIC);
679 else if (ieee80211_is_mgmt(hdr->frame_control))
680 cfg80211_mgmt_tx_status_ext(&sdata->wdev,
681 &status,
682 GFP_ATOMIC);
683 else
684 pr_warn("Unknown status report in ack skb\n");
685
686 }
687 rcu_read_unlock();
688
689 dev_kfree_skb_any(skb);
690 } else if (dropped) {
691 dev_kfree_skb_any(skb);
692 } else {
693 /* consumes skb */
694 skb_complete_wifi_ack(skb, acked);
695 }
696 }
697
ieee80211_report_used_skb(struct ieee80211_local * local,struct sk_buff * skb,bool dropped,ktime_t ack_hwtstamp)698 static void ieee80211_report_used_skb(struct ieee80211_local *local,
699 struct sk_buff *skb, bool dropped,
700 ktime_t ack_hwtstamp)
701 {
702 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
703 u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
704 struct ieee80211_hdr *hdr = (void *)skb->data;
705 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
706
707 if (dropped)
708 acked = false;
709
710 if (tx_time_est) {
711 struct sta_info *sta;
712
713 rcu_read_lock();
714
715 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
716 ieee80211_sta_update_pending_airtime(local, sta,
717 skb_get_queue_mapping(skb),
718 tx_time_est,
719 true);
720 rcu_read_unlock();
721 }
722
723 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
724 struct ieee80211_sub_if_data *sdata;
725
726 rcu_read_lock();
727
728 sdata = ieee80211_sdata_from_skb(local, skb);
729
730 if (!sdata) {
731 skb->dev = NULL;
732 } else if (!dropped) {
733 unsigned int hdr_size =
734 ieee80211_hdrlen(hdr->frame_control);
735
736 /* Check to see if packet is a TDLS teardown packet */
737 if (ieee80211_is_data(hdr->frame_control) &&
738 (ieee80211_get_tdls_action(skb, hdr_size) ==
739 WLAN_TDLS_TEARDOWN)) {
740 ieee80211_tdls_td_tx_handle(local, sdata, skb,
741 info->flags);
742 } else if (ieee80211_s1g_is_twt_setup(skb)) {
743 if (!acked) {
744 struct sk_buff *qskb;
745
746 qskb = skb_clone(skb, GFP_ATOMIC);
747 if (qskb) {
748 skb_queue_tail(&sdata->status_queue,
749 qskb);
750 ieee80211_queue_work(&local->hw,
751 &sdata->work);
752 }
753 }
754 } else {
755 ieee80211_mgd_conn_tx_status(sdata,
756 hdr->frame_control,
757 acked);
758 }
759 }
760
761 rcu_read_unlock();
762 } else if (info->ack_frame_id) {
763 ieee80211_report_ack_skb(local, skb, acked, dropped,
764 ack_hwtstamp);
765 }
766
767 if (!dropped && skb->destructor) {
768 skb->wifi_acked_valid = 1;
769 skb->wifi_acked = acked;
770 }
771
772 ieee80211_led_tx(local);
773
774 if (skb_has_frag_list(skb)) {
775 kfree_skb_list(skb_shinfo(skb)->frag_list);
776 skb_shinfo(skb)->frag_list = NULL;
777 }
778 }
779
780 /*
781 * Use a static threshold for now, best value to be determined
782 * by testing ...
783 * Should it depend on:
784 * - on # of retransmissions
785 * - current throughput (higher value for higher tpt)?
786 */
787 #define STA_LOST_PKT_THRESHOLD 50
788 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */
789 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
790
ieee80211_lost_packet(struct sta_info * sta,struct ieee80211_tx_info * info)791 static void ieee80211_lost_packet(struct sta_info *sta,
792 struct ieee80211_tx_info *info)
793 {
794 unsigned long pkt_time = STA_LOST_PKT_TIME;
795 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
796
797 /* If driver relies on its own algorithm for station kickout, skip
798 * mac80211 packet loss mechanism.
799 */
800 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
801 return;
802
803 /* This packet was aggregated but doesn't carry status info */
804 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
805 !(info->flags & IEEE80211_TX_STAT_AMPDU))
806 return;
807
808 sta->deflink.status_stats.lost_packets++;
809 if (sta->sta.tdls) {
810 pkt_time = STA_LOST_TDLS_PKT_TIME;
811 pkt_thr = STA_LOST_PKT_THRESHOLD;
812 }
813
814 /*
815 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
816 * of the last packets were lost, and that no ACK was received in the
817 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
818 * mechanism.
819 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
820 */
821 if (sta->deflink.status_stats.lost_packets < pkt_thr ||
822 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time))
823 return;
824
825 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
826 sta->deflink.status_stats.lost_packets,
827 GFP_ATOMIC);
828 sta->deflink.status_stats.lost_packets = 0;
829 }
830
ieee80211_tx_get_rates(struct ieee80211_hw * hw,struct ieee80211_tx_info * info,int * retry_count)831 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
832 struct ieee80211_tx_info *info,
833 int *retry_count)
834 {
835 int count = -1;
836 int i;
837
838 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
839 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
840 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
841 /* just the first aggr frame carry status info */
842 info->status.rates[i].idx = -1;
843 info->status.rates[i].count = 0;
844 break;
845 } else if (info->status.rates[i].idx < 0) {
846 break;
847 } else if (i >= hw->max_report_rates) {
848 /* the HW cannot have attempted that rate */
849 info->status.rates[i].idx = -1;
850 info->status.rates[i].count = 0;
851 break;
852 }
853
854 count += info->status.rates[i].count;
855 }
856
857 if (count < 0)
858 count = 0;
859
860 *retry_count = count;
861 return i - 1;
862 }
863
ieee80211_tx_monitor(struct ieee80211_local * local,struct sk_buff * skb,int retry_count,int shift,bool send_to_cooked,struct ieee80211_tx_status * status)864 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
865 int retry_count, int shift, bool send_to_cooked,
866 struct ieee80211_tx_status *status)
867 {
868 struct sk_buff *skb2;
869 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
870 struct ieee80211_sub_if_data *sdata;
871 struct net_device *prev_dev = NULL;
872 int rtap_len;
873
874 /* send frame to monitor interfaces now */
875 rtap_len = ieee80211_tx_radiotap_len(info, status);
876 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
877 pr_err("ieee80211_tx_status: headroom too small\n");
878 dev_kfree_skb(skb);
879 return;
880 }
881 ieee80211_add_tx_radiotap_header(local, skb, retry_count,
882 rtap_len, shift, status);
883
884 /* XXX: is this sufficient for BPF? */
885 skb_reset_mac_header(skb);
886 skb->ip_summed = CHECKSUM_UNNECESSARY;
887 skb->pkt_type = PACKET_OTHERHOST;
888 skb->protocol = htons(ETH_P_802_2);
889 memset(skb->cb, 0, sizeof(skb->cb));
890
891 rcu_read_lock();
892 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
893 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
894 if (!ieee80211_sdata_running(sdata))
895 continue;
896
897 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
898 !send_to_cooked)
899 continue;
900
901 if (prev_dev) {
902 skb2 = skb_clone(skb, GFP_ATOMIC);
903 if (skb2) {
904 skb2->dev = prev_dev;
905 netif_rx(skb2);
906 }
907 }
908
909 prev_dev = sdata->dev;
910 }
911 }
912 if (prev_dev) {
913 skb->dev = prev_dev;
914 netif_rx(skb);
915 skb = NULL;
916 }
917 rcu_read_unlock();
918 dev_kfree_skb(skb);
919 }
920
__ieee80211_tx_status(struct ieee80211_hw * hw,struct ieee80211_tx_status * status,int rates_idx,int retry_count)921 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
922 struct ieee80211_tx_status *status,
923 int rates_idx, int retry_count)
924 {
925 struct sk_buff *skb = status->skb;
926 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
927 struct ieee80211_local *local = hw_to_local(hw);
928 struct ieee80211_tx_info *info = status->info;
929 struct sta_info *sta;
930 __le16 fc;
931 bool send_to_cooked;
932 bool acked;
933 bool noack_success;
934 struct ieee80211_bar *bar;
935 int shift = 0;
936 int tid = IEEE80211_NUM_TIDS;
937
938 fc = hdr->frame_control;
939
940 if (status->sta) {
941 sta = container_of(status->sta, struct sta_info, sta);
942 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
943
944 if (info->flags & IEEE80211_TX_STATUS_EOSP)
945 clear_sta_flag(sta, WLAN_STA_SP);
946
947 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
948 noack_success = !!(info->flags &
949 IEEE80211_TX_STAT_NOACK_TRANSMITTED);
950
951 /* mesh Peer Service Period support */
952 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
953 ieee80211_is_data_qos(fc))
954 ieee80211_mpsp_trigger_process(
955 ieee80211_get_qos_ctl(hdr), sta, true, acked);
956
957 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
958 (ieee80211_is_data(hdr->frame_control)) &&
959 (rates_idx != -1))
960 sta->deflink.tx_stats.last_rate =
961 info->status.rates[rates_idx];
962
963 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
964 (ieee80211_is_data_qos(fc))) {
965 u16 ssn;
966 u8 *qc;
967
968 qc = ieee80211_get_qos_ctl(hdr);
969 tid = qc[0] & 0xf;
970 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
971 & IEEE80211_SCTL_SEQ);
972 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
973 tid, ssn);
974 } else if (ieee80211_is_data_qos(fc)) {
975 u8 *qc = ieee80211_get_qos_ctl(hdr);
976
977 tid = qc[0] & 0xf;
978 }
979
980 if (!acked && ieee80211_is_back_req(fc)) {
981 u16 control;
982
983 /*
984 * BAR failed, store the last SSN and retry sending
985 * the BAR when the next unicast transmission on the
986 * same TID succeeds.
987 */
988 bar = (struct ieee80211_bar *) skb->data;
989 control = le16_to_cpu(bar->control);
990 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
991 u16 ssn = le16_to_cpu(bar->start_seq_num);
992
993 tid = (control &
994 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
995 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
996
997 ieee80211_set_bar_pending(sta, tid, ssn);
998 }
999 }
1000
1001 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1002 ieee80211_handle_filtered_frame(local, sta, skb);
1003 return;
1004 } else if (ieee80211_is_data_present(fc)) {
1005 if (!acked && !noack_success)
1006 sta->deflink.status_stats.msdu_failed[tid]++;
1007
1008 sta->deflink.status_stats.msdu_retries[tid] +=
1009 retry_count;
1010 }
1011
1012 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
1013 ieee80211_frame_acked(sta, skb);
1014
1015 }
1016
1017 /* SNMP counters
1018 * Fragments are passed to low-level drivers as separate skbs, so these
1019 * are actually fragments, not frames. Update frame counters only for
1020 * the first fragment of the frame. */
1021 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1022 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1023 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1024 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1025 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1026 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1027 if (retry_count > 0)
1028 I802_DEBUG_INC(local->dot11RetryCount);
1029 if (retry_count > 1)
1030 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1031 }
1032
1033 /* This counter shall be incremented for an acknowledged MPDU
1034 * with an individual address in the address 1 field or an MPDU
1035 * with a multicast address in the address 1 field of type Data
1036 * or Management. */
1037 if (!is_multicast_ether_addr(hdr->addr1) ||
1038 ieee80211_is_data(fc) ||
1039 ieee80211_is_mgmt(fc))
1040 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1041 } else {
1042 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1043 I802_DEBUG_INC(local->dot11FailedCount);
1044 }
1045
1046 if (ieee80211_is_any_nullfunc(fc) &&
1047 ieee80211_has_pm(fc) &&
1048 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1049 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1050 local->ps_sdata && !(local->scanning)) {
1051 if (info->flags & IEEE80211_TX_STAT_ACK)
1052 local->ps_sdata->u.mgd.flags |=
1053 IEEE80211_STA_NULLFUNC_ACKED;
1054 mod_timer(&local->dynamic_ps_timer,
1055 jiffies + msecs_to_jiffies(10));
1056 }
1057
1058 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1059
1060 /* this was a transmitted frame, but now we want to reuse it */
1061 skb_orphan(skb);
1062
1063 /* Need to make a copy before skb->cb gets cleared */
1064 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1065 !(ieee80211_is_data(fc));
1066
1067 /*
1068 * This is a bit racy but we can avoid a lot of work
1069 * with this test...
1070 */
1071 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1072 if (status->free_list)
1073 list_add_tail(&skb->list, status->free_list);
1074 else
1075 dev_kfree_skb(skb);
1076 return;
1077 }
1078
1079 /* send to monitor interfaces */
1080 ieee80211_tx_monitor(local, skb, retry_count, shift,
1081 send_to_cooked, status);
1082 }
1083
ieee80211_tx_status(struct ieee80211_hw * hw,struct sk_buff * skb)1084 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1085 {
1086 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1087 struct ieee80211_local *local = hw_to_local(hw);
1088 struct ieee80211_tx_status status = {
1089 .skb = skb,
1090 .info = IEEE80211_SKB_CB(skb),
1091 };
1092 struct sta_info *sta;
1093
1094 rcu_read_lock();
1095
1096 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1097 if (sta)
1098 status.sta = &sta->sta;
1099
1100 ieee80211_tx_status_ext(hw, &status);
1101 rcu_read_unlock();
1102 }
1103 EXPORT_SYMBOL(ieee80211_tx_status);
1104
ieee80211_tx_status_ext(struct ieee80211_hw * hw,struct ieee80211_tx_status * status)1105 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1106 struct ieee80211_tx_status *status)
1107 {
1108 struct ieee80211_local *local = hw_to_local(hw);
1109 struct ieee80211_tx_info *info = status->info;
1110 struct ieee80211_sta *pubsta = status->sta;
1111 struct sk_buff *skb = status->skb;
1112 struct sta_info *sta = NULL;
1113 int rates_idx, retry_count;
1114 bool acked, noack_success, ack_signal_valid;
1115 u16 tx_time_est;
1116
1117 if (pubsta) {
1118 sta = container_of(pubsta, struct sta_info, sta);
1119
1120 if (status->n_rates)
1121 sta->deflink.tx_stats.last_rate_info =
1122 status->rates[status->n_rates - 1].rate_idx;
1123 }
1124
1125 if (skb && (tx_time_est =
1126 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1127 /* Do this here to avoid the expensive lookup of the sta
1128 * in ieee80211_report_used_skb().
1129 */
1130 ieee80211_sta_update_pending_airtime(local, sta,
1131 skb_get_queue_mapping(skb),
1132 tx_time_est,
1133 true);
1134 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1135 }
1136
1137 if (!status->info)
1138 goto free;
1139
1140 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1141
1142 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1143 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1144 ack_signal_valid =
1145 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1146
1147 if (pubsta) {
1148 struct ieee80211_sub_if_data *sdata = sta->sdata;
1149
1150 if (!acked && !noack_success)
1151 sta->deflink.status_stats.retry_failed++;
1152 sta->deflink.status_stats.retry_count += retry_count;
1153
1154 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1155 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1156 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1157 ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1158 acked, info->status.tx_time);
1159
1160 if (acked) {
1161 sta->deflink.status_stats.last_ack = jiffies;
1162
1163 if (sta->deflink.status_stats.lost_packets)
1164 sta->deflink.status_stats.lost_packets = 0;
1165
1166 /* Track when last packet was ACKed */
1167 sta->deflink.status_stats.last_pkt_time = jiffies;
1168
1169 /* Reset connection monitor */
1170 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1171 unlikely(sdata->u.mgd.probe_send_count > 0))
1172 sdata->u.mgd.probe_send_count = 0;
1173
1174 if (ack_signal_valid) {
1175 sta->deflink.status_stats.last_ack_signal =
1176 (s8)info->status.ack_signal;
1177 sta->deflink.status_stats.ack_signal_filled = true;
1178 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal,
1179 -info->status.ack_signal);
1180 }
1181 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1182 /*
1183 * The STA is in power save mode, so assume
1184 * that this TX packet failed because of that.
1185 */
1186 if (skb)
1187 ieee80211_handle_filtered_frame(local, sta, skb);
1188 return;
1189 } else if (noack_success) {
1190 /* nothing to do here, do not account as lost */
1191 } else {
1192 ieee80211_lost_packet(sta, info);
1193 }
1194 }
1195
1196 rate_control_tx_status(local, status);
1197 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1198 ieee80211s_update_metric(local, sta, status);
1199 }
1200
1201 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1202 return __ieee80211_tx_status(hw, status, rates_idx,
1203 retry_count);
1204
1205 if (acked || noack_success) {
1206 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1207 if (!pubsta)
1208 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1209 if (retry_count > 0)
1210 I802_DEBUG_INC(local->dot11RetryCount);
1211 if (retry_count > 1)
1212 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1213 } else {
1214 I802_DEBUG_INC(local->dot11FailedCount);
1215 }
1216
1217 free:
1218 if (!skb)
1219 return;
1220
1221 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1222 if (status->free_list)
1223 list_add_tail(&skb->list, status->free_list);
1224 else
1225 dev_kfree_skb(skb);
1226 }
1227 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1228
ieee80211_tx_rate_update(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,struct ieee80211_tx_info * info)1229 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1230 struct ieee80211_sta *pubsta,
1231 struct ieee80211_tx_info *info)
1232 {
1233 struct ieee80211_local *local = hw_to_local(hw);
1234 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1235 struct ieee80211_tx_status status = {
1236 .info = info,
1237 .sta = pubsta,
1238 };
1239
1240 rate_control_tx_status(local, &status);
1241
1242 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1243 sta->deflink.tx_stats.last_rate = info->status.rates[0];
1244 }
1245 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1246
ieee80211_tx_status_8023(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct sk_buff * skb)1247 void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1248 struct ieee80211_vif *vif,
1249 struct sk_buff *skb)
1250 {
1251 struct ieee80211_sub_if_data *sdata;
1252 struct ieee80211_tx_status status = {
1253 .skb = skb,
1254 .info = IEEE80211_SKB_CB(skb),
1255 };
1256 struct sta_info *sta;
1257
1258 sdata = vif_to_sdata(vif);
1259
1260 rcu_read_lock();
1261
1262 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta))
1263 status.sta = &sta->sta;
1264
1265 ieee80211_tx_status_ext(hw, &status);
1266
1267 rcu_read_unlock();
1268 }
1269 EXPORT_SYMBOL(ieee80211_tx_status_8023);
1270
ieee80211_report_low_ack(struct ieee80211_sta * pubsta,u32 num_packets)1271 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1272 {
1273 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1274 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1275 num_packets, GFP_ATOMIC);
1276 }
1277 EXPORT_SYMBOL(ieee80211_report_low_ack);
1278
ieee80211_free_txskb(struct ieee80211_hw * hw,struct sk_buff * skb)1279 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1280 {
1281 struct ieee80211_local *local = hw_to_local(hw);
1282 ktime_t kt = ktime_set(0, 0);
1283
1284 ieee80211_report_used_skb(local, skb, true, kt);
1285 dev_kfree_skb_any(skb);
1286 }
1287 EXPORT_SYMBOL(ieee80211_free_txskb);
1288
ieee80211_purge_tx_queue(struct ieee80211_hw * hw,struct sk_buff_head * skbs)1289 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1290 struct sk_buff_head *skbs)
1291 {
1292 struct sk_buff *skb;
1293
1294 while ((skb = __skb_dequeue(skbs)))
1295 ieee80211_free_txskb(hw, skb);
1296 }
1297