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Johannes Bergfe7a5d52009-11-18 18:42:47 +01001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
Jouni Malinen026331c2010-02-15 12:53:10 +02005 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Bergfe7a5d52009-11-18 18:42:47 +01007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040013#include <linux/export.h>
Felix Fietkau888d04d2012-03-01 15:22:09 +010014#include <linux/etherdevice.h>
Johannes Bergfe7a5d52009-11-18 18:42:47 +010015#include <net/mac80211.h>
Johannes Bergd26ad372012-02-20 11:38:41 +010016#include <asm/unaligned.h>
Johannes Bergfe7a5d52009-11-18 18:42:47 +010017#include "ieee80211_i.h"
18#include "rate.h"
19#include "mesh.h"
20#include "led.h"
Johannes Berg948d8872011-09-29 16:04:29 +020021#include "wme.h"
Johannes Bergfe7a5d52009-11-18 18:42:47 +010022
23
24void ieee80211_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))) {
Felix Fietkauc3e77242012-10-08 14:39:33 +020038 ieee80211_free_txskb(hw, skb);
Johannes Bergfe7a5d52009-11-18 18:42:47 +010039 tmp--;
40 I802_DEBUG_INC(local->tx_status_drop);
41 }
42 tasklet_schedule(&local->tasklet);
43}
44EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
45
46static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
47 struct sta_info *sta,
48 struct sk_buff *skb)
49{
50 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg948d8872011-09-29 16:04:29 +020051 struct ieee80211_hdr *hdr = (void *)skb->data;
52 int ac;
Johannes Bergfe7a5d52009-11-18 18:42:47 +010053
Helmut Schaada629cf2016-01-05 17:42:13 +010054 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
55 ieee80211_free_txskb(&local->hw, skb);
56 return;
57 }
58
Johannes Bergfe7a5d52009-11-18 18:42:47 +010059 /*
Johannes Berg697e6a02010-01-17 01:47:56 +010060 * This skb 'survived' a round-trip through the driver, and
61 * hopefully the driver didn't mangle it too badly. However,
Walter Goldens77c20612010-05-18 04:44:54 -070062 * we can definitely not rely on the control information
Johannes Bergc6fcf6b2010-01-17 01:47:59 +010063 * 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.
Johannes Berg697e6a02010-01-17 01:47:56 +010066 */
67 memset(&info->control, 0, sizeof(info->control));
Johannes Berg18c94902010-01-25 19:07:39 +010068
69 info->control.jiffies = jiffies;
70 info->control.vif = &sta->sdata->vif;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +010071 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
72 IEEE80211_TX_INTFL_RETRANSMISSION;
Christian Lampartereb7d3062010-09-21 21:36:18 +020073 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg697e6a02010-01-17 01:47:56 +010074
Johannes Berge5a9f8d2015-10-16 17:54:47 +020075 sta->status_stats.filtered++;
Johannes Bergfe7a5d52009-11-18 18:42:47 +010076
Johannes Berg8a8656f2011-09-29 16:04:31 +020077 /*
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
Johannes Berg948d8872011-09-29 16:04:29 +020087 if (ieee80211_is_data_qos(hdr->frame_control)) {
Johannes Berg47086fc2011-09-29 16:04:33 +020088 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;
Johannes Berg948d8872011-09-29 16:04:29 +020098 ac = ieee802_1d_to_ac[tid & 7];
99 } else {
100 ac = IEEE80211_AC_BE;
101 }
102
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100103 /*
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 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200108 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
Felix Fietkauf7418bc2015-09-24 14:59:49 +0200109 ieee80211_clear_fast_xmit(sta);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100110
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.
Arik Nemtsovd057e5a2011-01-31 22:29:13 +0200140 * (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.
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100144 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200145 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg948d8872011-09-29 16:04:29 +0200146 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
147 skb_queue_tail(&sta->tx_filtered[ac], skb);
Johannes Bergc868cb352011-09-29 16:04:27 +0200148 sta_info_recalc_tim(sta);
Johannes Berg60750392011-09-29 16:04:28 +0200149
150 if (!timer_pending(&local->sta_cleanup))
151 mod_timer(&local->sta_cleanup,
152 round_jiffies(jiffies +
153 STA_INFO_CLEANUP_INTERVAL));
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100154 return;
155 }
156
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200157 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100158 !(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
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200165 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);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200169 ieee80211_free_txskb(&local->hw, skb);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100170}
171
Felix Fietkauf0425be2011-08-28 21:11:01 +0200172static 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;
Felix Fietkau8c771242011-08-20 15:53:55 +0200181 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
Felix Fietkauf0425be2011-08-28 21:11:01 +0200182}
183
Johannes Berg0f782312009-12-01 13:37:02 +0100184static 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
Johannes Berg30686bf2015-06-02 21:39:54 +0200190 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200191 sta->rx_stats.last_rx = jiffies;
Felix Fietkau0c5b9322013-09-29 21:39:34 +0200192
Felix Fietkauf0425be2011-08-28 21:11:01 +0200193 if (ieee80211_is_data_qos(mgmt->frame_control)) {
194 struct ieee80211_hdr *hdr = (void *) skb->data;
195 u8 *qc = ieee80211_get_qos_ctl(hdr);
196 u16 tid = qc[0] & 0xf;
197
198 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
199 }
200
Johannes Berg0f782312009-12-01 13:37:02 +0100201 if (ieee80211_is_action(mgmt->frame_control) &&
Johannes Berg0f782312009-12-01 13:37:02 +0100202 mgmt->u.action.category == WLAN_CATEGORY_HT &&
Johannes Berg04ecd252012-09-11 14:34:12 +0200203 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
Johannes Berg04ecd252012-09-11 14:34:12 +0200204 ieee80211_sdata_running(sdata)) {
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300205 enum ieee80211_smps_mode smps_mode;
206
Johannes Berg0f782312009-12-01 13:37:02 +0100207 switch (mgmt->u.action.u.ht_smps.smps_control) {
208 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300209 smps_mode = IEEE80211_SMPS_DYNAMIC;
Johannes Berg0f782312009-12-01 13:37:02 +0100210 break;
211 case WLAN_HT_SMPS_CONTROL_STATIC:
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300212 smps_mode = IEEE80211_SMPS_STATIC;
Johannes Berg0f782312009-12-01 13:37:02 +0100213 break;
214 case WLAN_HT_SMPS_CONTROL_DISABLED:
215 default: /* shouldn't happen since we don't send that */
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300216 smps_mode = IEEE80211_SMPS_OFF;
Johannes Berg0f782312009-12-01 13:37:02 +0100217 break;
218 }
219
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300220 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
221 /*
222 * This update looks racy, but isn't -- if we come
223 * here we've definitely got a station that we're
224 * talking to, and on a managed interface that can
225 * only be the AP. And the only other place updating
226 * this variable in managed mode is before association.
227 */
228 sdata->smps_mode = smps_mode;
229 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
230 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
231 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
232 sta->known_smps_mode = smps_mode;
233 }
Johannes Berg0f782312009-12-01 13:37:02 +0100234 }
235}
236
Felix Fietkauf0425be2011-08-28 21:11:01 +0200237static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
238{
239 struct tid_ampdu_tx *tid_tx;
240
241 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
242 if (!tid_tx)
243 return;
244
245 tid_tx->failed_bar_ssn = ssn;
246 tid_tx->bar_pending = true;
247}
248
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200249static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
250{
251 int len = sizeof(struct ieee80211_radiotap_header);
252
253 /* IEEE80211_RADIOTAP_RATE rate */
254 if (info->status.rates[0].idx >= 0 &&
Karl Beldana8241312013-07-27 11:47:04 +0200255 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
256 IEEE80211_TX_RC_VHT_MCS)))
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200257 len += 2;
258
259 /* IEEE80211_RADIOTAP_TX_FLAGS */
260 len += 2;
261
262 /* IEEE80211_RADIOTAP_DATA_RETRIES */
263 len += 1;
264
Karl Beldana8241312013-07-27 11:47:04 +0200265 /* IEEE80211_RADIOTAP_MCS
266 * IEEE80211_RADIOTAP_VHT */
267 if (info->status.rates[0].idx >= 0) {
268 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
269 len += 3;
270 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
271 len = ALIGN(len, 2) + 12;
272 }
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200273
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200274 return len;
275}
276
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200277static void
Karl Beldana8241312013-07-27 11:47:04 +0200278ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
279 struct ieee80211_supported_band *sband,
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200280 struct sk_buff *skb, int retry_count,
281 int rtap_len, int shift)
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200282{
283 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
285 struct ieee80211_radiotap_header *rthdr;
286 unsigned char *pos;
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100287 u16 txflags;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200288
289 rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);
290
291 memset(rthdr, 0, rtap_len);
292 rthdr->it_len = cpu_to_le16(rtap_len);
293 rthdr->it_present =
294 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
295 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
296 pos = (unsigned char *)(rthdr + 1);
297
298 /*
299 * XXX: Once radiotap gets the bitmap reset thing the vendor
300 * extensions proposal contains, we can actually report
301 * the whole set of tries we did.
302 */
303
304 /* IEEE80211_RADIOTAP_RATE */
305 if (info->status.rates[0].idx >= 0 &&
Karl Beldana8241312013-07-27 11:47:04 +0200306 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
307 IEEE80211_TX_RC_VHT_MCS))) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200308 u16 rate;
309
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200310 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200311 rate = sband->bitrates[info->status.rates[0].idx].bitrate;
312 *pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200313 /* padding for tx flags */
314 pos += 2;
315 }
316
317 /* IEEE80211_RADIOTAP_TX_FLAGS */
318 txflags = 0;
319 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
320 !is_multicast_ether_addr(hdr->addr1))
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100321 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200322
Bob Copeland311ab8e2014-04-16 08:32:41 -0400323 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100324 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
Bob Copeland311ab8e2014-04-16 08:32:41 -0400325 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100326 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200327
328 put_unaligned_le16(txflags, pos);
329 pos += 2;
330
331 /* IEEE80211_RADIOTAP_DATA_RETRIES */
332 /* for now report the total retry_count */
333 *pos = retry_count;
334 pos++;
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200335
Karl Beldana8241312013-07-27 11:47:04 +0200336 if (info->status.rates[0].idx < 0)
337 return;
338
339 /* IEEE80211_RADIOTAP_MCS
340 * IEEE80211_RADIOTAP_VHT */
341 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200342 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
343 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
344 IEEE80211_RADIOTAP_MCS_HAVE_GI |
345 IEEE80211_RADIOTAP_MCS_HAVE_BW;
346 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
347 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
348 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
349 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
350 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
351 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
352 pos[2] = info->status.rates[0].idx;
353 pos += 3;
Karl Beldana8241312013-07-27 11:47:04 +0200354 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
355 u16 known = local->hw.radiotap_vht_details &
356 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
357 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200358
Karl Beldana8241312013-07-27 11:47:04 +0200359 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
360
361 /* required alignment from rthdr */
362 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
363
364 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
365 put_unaligned_le16(known, pos);
366 pos += 2;
367
368 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
369 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
370 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
371 pos++;
372
373 /* u8 bandwidth */
374 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
375 *pos = 1;
376 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
377 *pos = 4;
378 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
379 *pos = 11;
380 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
381 *pos = 0;
382 pos++;
383
384 /* u8 mcs_nss[4] */
385 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
386 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
387 pos += 4;
388
389 /* u8 coding */
390 pos++;
391 /* u8 group_id */
392 pos++;
393 /* u16 partial_aid */
394 pos += 2;
395 }
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200396}
397
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200398/*
399 * Handles the tx for TDLS teardown frames.
400 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
401 */
402static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
403 struct ieee80211_sub_if_data *sdata,
404 struct sk_buff *skb, u32 flags)
405{
406 struct sk_buff *teardown_skb;
407 struct sk_buff *orig_teardown_skb;
408 bool is_teardown = false;
409
410 /* Get the teardown data we need and free the lock */
411 spin_lock(&sdata->u.mgd.teardown_lock);
412 teardown_skb = sdata->u.mgd.teardown_skb;
413 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
414 if ((skb == orig_teardown_skb) && teardown_skb) {
415 sdata->u.mgd.teardown_skb = NULL;
416 sdata->u.mgd.orig_teardown_skb = NULL;
417 is_teardown = true;
418 }
419 spin_unlock(&sdata->u.mgd.teardown_lock);
420
421 if (is_teardown) {
422 /* This mechanism relies on being able to get ACKs */
Johannes Berg30686bf2015-06-02 21:39:54 +0200423 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200424
425 /* Check if peer has ACKed */
426 if (flags & IEEE80211_TX_STAT_ACK) {
427 dev_kfree_skb_any(teardown_skb);
428 } else {
429 tdls_dbg(sdata,
430 "TDLS Resending teardown through AP\n");
431
432 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
433 }
434 }
435}
436
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200437static struct ieee80211_sub_if_data *
438ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
439{
440 struct ieee80211_sub_if_data *sdata;
441
442 if (skb->dev) {
443 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
444 if (!sdata->dev)
445 continue;
446
447 if (skb->dev == sdata->dev)
448 return sdata;
449 }
450
451 return NULL;
452 }
453
454 return rcu_dereference(local->p2p_sdata);
455}
456
457static void ieee80211_report_ack_skb(struct ieee80211_local *local,
458 struct ieee80211_tx_info *info,
459 bool acked, bool dropped)
460{
461 struct sk_buff *skb;
462 unsigned long flags;
463
464 spin_lock_irqsave(&local->ack_status_lock, flags);
465 skb = idr_find(&local->ack_status_frames, info->ack_frame_id);
466 if (skb)
467 idr_remove(&local->ack_status_frames, info->ack_frame_id);
468 spin_unlock_irqrestore(&local->ack_status_lock, flags);
469
470 if (!skb)
471 return;
472
473 if (dropped) {
474 dev_kfree_skb_any(skb);
475 return;
476 }
477
478 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
Johannes Berg3b79af92015-06-01 23:14:59 +0200479 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200480 struct ieee80211_sub_if_data *sdata;
Johannes Berg3b79af92015-06-01 23:14:59 +0200481 struct ieee80211_hdr *hdr = (void *)skb->data;
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200482
483 rcu_read_lock();
484 sdata = ieee80211_sdata_from_skb(local, skb);
Johannes Berg3b79af92015-06-01 23:14:59 +0200485 if (sdata) {
486 if (ieee80211_is_nullfunc(hdr->frame_control) ||
487 ieee80211_is_qos_nullfunc(hdr->frame_control))
488 cfg80211_probe_status(sdata->dev, hdr->addr1,
489 cookie, acked,
490 GFP_ATOMIC);
491 else
492 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
493 skb->data, skb->len,
494 acked, GFP_ATOMIC);
495 }
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200496 rcu_read_unlock();
497
498 dev_kfree_skb_any(skb);
499 } else {
500 /* consumes skb */
501 skb_complete_wifi_ack(skb, acked);
502 }
503}
504
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200505static void ieee80211_report_used_skb(struct ieee80211_local *local,
506 struct sk_buff *skb, bool dropped)
507{
508 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
509 struct ieee80211_hdr *hdr = (void *)skb->data;
510 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
511
512 if (dropped)
513 acked = false;
514
Johannes Berg3b79af92015-06-01 23:14:59 +0200515 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200516 struct ieee80211_sub_if_data *sdata;
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200517
518 rcu_read_lock();
519
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200520 sdata = ieee80211_sdata_from_skb(local, skb);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200521
Johannes Berg1672c0e32013-01-29 15:02:27 +0100522 if (!sdata) {
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200523 skb->dev = NULL;
Dan Carpenter75dbf002015-07-27 11:11:11 +0300524 } else {
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200525 unsigned int hdr_size =
526 ieee80211_hdrlen(hdr->frame_control);
527
528 /* Check to see if packet is a TDLS teardown packet */
529 if (ieee80211_is_data(hdr->frame_control) &&
530 (ieee80211_get_tdls_action(skb, hdr_size) ==
531 WLAN_TDLS_TEARDOWN))
532 ieee80211_tdls_td_tx_handle(local, sdata, skb,
533 info->flags);
534 else
535 ieee80211_mgd_conn_tx_status(sdata,
536 hdr->frame_control,
537 acked);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200538 }
539
540 rcu_read_unlock();
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200541 } else if (info->ack_frame_id) {
542 ieee80211_report_ack_skb(local, info, acked, dropped);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200543 }
544}
545
Johannes Berg99ba2a12010-11-24 08:10:06 +0100546/*
547 * Use a static threshold for now, best value to be determined
548 * by testing ...
549 * Should it depend on:
550 * - on # of retransmissions
551 * - current throughput (higher value for higher tpt)?
552 */
553#define STA_LOST_PKT_THRESHOLD 50
Liad Kaufman9d58f252014-09-04 08:28:40 +0300554#define STA_LOST_TDLS_PKT_THRESHOLD 10
555#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
Johannes Berg99ba2a12010-11-24 08:10:06 +0100556
Felix Fietkauad9dda62014-11-19 20:08:11 +0100557static void ieee80211_lost_packet(struct sta_info *sta,
558 struct ieee80211_tx_info *info)
Felix Fietkauabd43a62014-05-23 20:05:28 +0200559{
Felix Fietkauabd43a62014-05-23 20:05:28 +0200560 /* This packet was aggregated but doesn't carry status info */
561 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
562 !(info->flags & IEEE80211_TX_STAT_AMPDU))
563 return;
564
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200565 sta->status_stats.lost_packets++;
566 if (!sta->sta.tdls &&
567 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
Liad Kaufman9d58f252014-09-04 08:28:40 +0300568 return;
569
570 /*
571 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
572 * of the last packets were lost, and that no ACK was received in the
573 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
574 * mechanism.
575 */
576 if (sta->sta.tdls &&
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200577 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
Liad Kaufman9d58f252014-09-04 08:28:40 +0300578 time_before(jiffies,
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200579 sta->status_stats.last_tdls_pkt_time +
580 STA_LOST_TDLS_PKT_TIME)))
Felix Fietkauabd43a62014-05-23 20:05:28 +0200581 return;
582
583 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200584 sta->status_stats.lost_packets, GFP_ATOMIC);
585 sta->status_stats.lost_packets = 0;
Felix Fietkauabd43a62014-05-23 20:05:28 +0200586}
587
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100588static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
589 struct ieee80211_tx_info *info,
590 int *retry_count)
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100591{
Juuso Oikarinen0c869802010-04-22 10:27:48 +0300592 int rates_idx = -1;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100593 int count = -1;
594 int i;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100595
596 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
Lorenzo Bianconid01b3162012-04-06 20:48:15 +0200597 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
598 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
599 /* just the first aggr frame carry status info */
600 info->status.rates[i].idx = -1;
601 info->status.rates[i].count = 0;
602 break;
603 } else if (info->status.rates[i].idx < 0) {
Helmut Schaabe7974a2011-03-21 15:07:55 +0100604 break;
605 } else if (i >= hw->max_report_rates) {
606 /* the HW cannot have attempted that rate */
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100607 info->status.rates[i].idx = -1;
608 info->status.rates[i].count = 0;
Helmut Schaabe7974a2011-03-21 15:07:55 +0100609 break;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100610 }
611
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100612 count += info->status.rates[i].count;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100613 }
Helmut Schaabe7974a2011-03-21 15:07:55 +0100614 rates_idx = i - 1;
615
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100616 if (count < 0)
617 count = 0;
618
619 *retry_count = count;
620 return rates_idx;
621}
622
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100623void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
624 struct ieee80211_sta *pubsta,
625 struct ieee80211_tx_info *info)
626{
627 struct ieee80211_local *local = hw_to_local(hw);
628 struct ieee80211_supported_band *sband;
629 int retry_count;
630 int rates_idx;
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530631 bool acked, noack_success;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100632
633 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
634
635 sband = hw->wiphy->bands[info->band];
636
637 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530638 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
639
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100640 if (pubsta) {
641 struct sta_info *sta;
642
643 sta = container_of(pubsta, struct sta_info, sta);
644
645 if (!acked)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200646 sta->status_stats.retry_failed++;
647 sta->status_stats.retry_count += retry_count;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100648
649 if (acked) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200650 sta->rx_stats.last_rx = jiffies;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100651
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200652 if (sta->status_stats.lost_packets)
653 sta->status_stats.lost_packets = 0;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100654
655 /* Track when last TDLS packet was ACKed */
656 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200657 sta->status_stats.last_tdls_pkt_time = jiffies;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100658 } else {
659 ieee80211_lost_packet(sta, info);
660 }
661
662 rate_control_tx_status_noskb(local, sband, sta, info);
663 }
664
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530665 if (acked || noack_success) {
Johannes Bergc206ca62015-04-22 20:47:28 +0200666 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
667 if (!pubsta)
668 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
669 if (retry_count > 0)
670 I802_DEBUG_INC(local->dot11RetryCount);
671 if (retry_count > 1)
672 I802_DEBUG_INC(local->dot11MultipleRetryCount);
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100673 } else {
Johannes Bergc206ca62015-04-22 20:47:28 +0200674 I802_DEBUG_INC(local->dot11FailedCount);
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100675 }
676}
677EXPORT_SYMBOL(ieee80211_tx_status_noskb);
678
Helmut Schaa4dc792b2015-09-02 13:23:30 +0200679void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
680 struct ieee80211_supported_band *sband,
681 int retry_count, int shift, bool send_to_cooked)
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100682{
683 struct sk_buff *skb2;
Helmut Schaa4dc792b2015-09-02 13:23:30 +0200684 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
685 struct ieee80211_sub_if_data *sdata;
686 struct net_device *prev_dev = NULL;
687 int rtap_len;
688
689 /* send frame to monitor interfaces now */
690 rtap_len = ieee80211_tx_radiotap_len(info);
691 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
692 pr_err("ieee80211_tx_status: headroom too small\n");
693 dev_kfree_skb(skb);
694 return;
695 }
696 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
697 rtap_len, shift);
698
699 /* XXX: is this sufficient for BPF? */
Zhang Shengjud57a5442016-03-03 01:16:56 +0000700 skb_reset_mac_header(skb);
Helmut Schaa4dc792b2015-09-02 13:23:30 +0200701 skb->ip_summed = CHECKSUM_UNNECESSARY;
702 skb->pkt_type = PACKET_OTHERHOST;
703 skb->protocol = htons(ETH_P_802_2);
704 memset(skb->cb, 0, sizeof(skb->cb));
705
706 rcu_read_lock();
707 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
708 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
709 if (!ieee80211_sdata_running(sdata))
710 continue;
711
712 if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
713 !send_to_cooked)
714 continue;
715
716 if (prev_dev) {
717 skb2 = skb_clone(skb, GFP_ATOMIC);
718 if (skb2) {
719 skb2->dev = prev_dev;
720 netif_rx(skb2);
721 }
722 }
723
724 prev_dev = sdata->dev;
725 }
726 }
727 if (prev_dev) {
728 skb->dev = prev_dev;
729 netif_rx(skb);
730 skb = NULL;
731 }
732 rcu_read_unlock();
733 dev_kfree_skb(skb);
734}
735
736void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
737{
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100738 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
739 struct ieee80211_local *local = hw_to_local(hw);
740 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
741 __le16 fc;
742 struct ieee80211_supported_band *sband;
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100743 struct sta_info *sta;
744 struct rhash_head *tmp;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100745 int retry_count;
746 int rates_idx;
747 bool send_to_cooked;
748 bool acked;
749 struct ieee80211_bar *bar;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100750 int shift = 0;
Johannes Berg5e06a9e2015-01-16 13:27:56 +0100751 int tid = IEEE80211_NUM_TIDS;
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100752 const struct bucket_table *tbl;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100753
754 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100755
756 rcu_read_lock();
757
758 sband = local->hw.wiphy->bands[info->band];
Vivek Natarajan375177b2010-02-09 14:50:28 +0530759 fc = hdr->frame_control;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100760
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100761 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
762
763 for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) {
Johannes Bergabe60632009-11-25 17:46:18 +0100764 /* skip wrong virtual interface */
Joe Perchesb203ca32012-05-08 18:56:52 +0000765 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
Johannes Bergabe60632009-11-25 17:46:18 +0100766 continue;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100767
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200768 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
769
Johannes Berg47086fc2011-09-29 16:04:33 +0200770 if (info->flags & IEEE80211_TX_STATUS_EOSP)
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200771 clear_sta_flag(sta, WLAN_STA_SP);
Johannes Berg47086fc2011-09-29 16:04:33 +0200772
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100773 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200774 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100775 /*
776 * The STA is in power save mode, so assume
777 * that this TX packet failed because of that.
778 */
779 ieee80211_handle_filtered_frame(local, sta, skb);
780 rcu_read_unlock();
781 return;
782 }
783
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100784 /* mesh Peer Service Period support */
785 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
786 ieee80211_is_data_qos(fc))
787 ieee80211_mpsp_trigger_process(
788 ieee80211_get_qos_ctl(hdr),
789 sta, true, acked);
790
Johannes Berg30686bf2015-06-02 21:39:54 +0200791 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
Chun-Yeow Yeoh00a9a6d2014-04-02 12:05:09 +0800792 (ieee80211_is_data(hdr->frame_control)) &&
Juuso Oikarinen0c869802010-04-22 10:27:48 +0300793 (rates_idx != -1))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200794 sta->tx_stats.last_rate =
795 info->status.rates[rates_idx];
Juuso Oikarinen0c869802010-04-22 10:27:48 +0300796
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100797 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
798 (ieee80211_is_data_qos(fc))) {
Johannes Berg79c892b2014-11-21 14:26:31 +0100799 u16 ssn;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100800 u8 *qc;
801
802 qc = ieee80211_get_qos_ctl(hdr);
803 tid = qc[0] & 0xf;
804 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
805 & IEEE80211_SCTL_SEQ);
Felix Fietkau8c771242011-08-20 15:53:55 +0200806 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100807 tid, ssn);
Johannes Berg79c892b2014-11-21 14:26:31 +0100808 } else if (ieee80211_is_data_qos(fc)) {
809 u8 *qc = ieee80211_get_qos_ctl(hdr);
810
811 tid = qc[0] & 0xf;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100812 }
813
Helmut Schaae69dede2011-08-11 16:17:42 +0200814 if (!acked && ieee80211_is_back_req(fc)) {
Johannes Berg79c892b2014-11-21 14:26:31 +0100815 u16 control;
Felix Fietkau71076762011-09-15 09:37:46 +0200816
Helmut Schaae69dede2011-08-11 16:17:42 +0200817 /*
Felix Fietkau71076762011-09-15 09:37:46 +0200818 * BAR failed, store the last SSN and retry sending
819 * the BAR when the next unicast transmission on the
820 * same TID succeeds.
Helmut Schaae69dede2011-08-11 16:17:42 +0200821 */
822 bar = (struct ieee80211_bar *) skb->data;
Felix Fietkau71076762011-09-15 09:37:46 +0200823 control = le16_to_cpu(bar->control);
824 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
Felix Fietkauf0425be2011-08-28 21:11:01 +0200825 u16 ssn = le16_to_cpu(bar->start_seq_num);
826
Felix Fietkau71076762011-09-15 09:37:46 +0200827 tid = (control &
Helmut Schaae69dede2011-08-11 16:17:42 +0200828 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
829 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200830
Stanislaw Gruszka8df6b7b2013-01-28 14:42:30 +0100831 ieee80211_set_bar_pending(sta, tid, ssn);
Helmut Schaae69dede2011-08-11 16:17:42 +0200832 }
833 }
834
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100835 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
836 ieee80211_handle_filtered_frame(local, sta, skb);
837 rcu_read_unlock();
838 return;
839 } else {
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100840 if (!acked)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200841 sta->status_stats.retry_failed++;
842 sta->status_stats.retry_count += retry_count;
Johannes Berg79c892b2014-11-21 14:26:31 +0100843
844 if (ieee80211_is_data_present(fc)) {
845 if (!acked)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200846 sta->status_stats.msdu_failed[tid]++;
847
848 sta->status_stats.msdu_retries[tid] +=
849 retry_count;
Johannes Berg79c892b2014-11-21 14:26:31 +0100850 }
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100851 }
852
853 rate_control_tx_status(local, sband, sta, skb);
854 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
855 ieee80211s_update_metric(local, sta, skb);
Johannes Berg0f782312009-12-01 13:37:02 +0100856
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100857 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
Johannes Berg0f782312009-12-01 13:37:02 +0100858 ieee80211_frame_acked(sta, skb);
Johannes Berg99ba2a12010-11-24 08:10:06 +0100859
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100860 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
Johannes Berg30686bf2015-06-02 21:39:54 +0200861 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
Johannes Berg02219b32014-10-07 10:38:50 +0300862 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
863 acked, info->status.tx_time);
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100864
Johannes Berg30686bf2015-06-02 21:39:54 +0200865 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
Johannes Berg99ba2a12010-11-24 08:10:06 +0100866 if (info->flags & IEEE80211_TX_STAT_ACK) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200867 if (sta->status_stats.lost_packets)
868 sta->status_stats.lost_packets = 0;
Liad Kaufman9d58f252014-09-04 08:28:40 +0300869
870 /* Track when last TDLS packet was ACKed */
871 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200872 sta->status_stats.last_tdls_pkt_time =
873 jiffies;
Felix Fietkauabd43a62014-05-23 20:05:28 +0200874 } else {
Felix Fietkauad9dda62014-11-19 20:08:11 +0100875 ieee80211_lost_packet(sta, info);
Johannes Berg99ba2a12010-11-24 08:10:06 +0100876 }
877 }
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100878 }
879
880 rcu_read_unlock();
881
Fabio Baltierie47f2502013-07-25 12:00:26 +0200882 ieee80211_led_tx(local);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100883
884 /* SNMP counters
885 * Fragments are passed to low-level drivers as separate skbs, so these
886 * are actually fragments, not frames. Update frame counters only for
887 * the first fragment of the frame. */
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530888 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
889 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100890 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
Johannes Bergc206ca62015-04-22 20:47:28 +0200891 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
Eliad Peller85b89af2014-12-21 15:25:28 +0200892 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
Johannes Bergc206ca62015-04-22 20:47:28 +0200893 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100894 if (retry_count > 0)
Johannes Bergc206ca62015-04-22 20:47:28 +0200895 I802_DEBUG_INC(local->dot11RetryCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100896 if (retry_count > 1)
Johannes Bergc206ca62015-04-22 20:47:28 +0200897 I802_DEBUG_INC(local->dot11MultipleRetryCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100898 }
899
900 /* This counter shall be incremented for an acknowledged MPDU
901 * with an individual address in the address 1 field or an MPDU
902 * with a multicast address in the address 1 field of type Data
903 * or Management. */
904 if (!is_multicast_ether_addr(hdr->addr1) ||
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100905 ieee80211_is_data(fc) ||
906 ieee80211_is_mgmt(fc))
Johannes Bergc206ca62015-04-22 20:47:28 +0200907 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100908 } else {
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100909 if (ieee80211_is_first_frag(hdr->seq_ctrl))
Johannes Bergc206ca62015-04-22 20:47:28 +0200910 I802_DEBUG_INC(local->dot11FailedCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100911 }
912
Vivek Natarajan375177b2010-02-09 14:50:28 +0530913 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
Johannes Berg30686bf2015-06-02 21:39:54 +0200914 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
Vivek Natarajan375177b2010-02-09 14:50:28 +0530915 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
916 local->ps_sdata && !(local->scanning)) {
917 if (info->flags & IEEE80211_TX_STAT_ACK) {
918 local->ps_sdata->u.mgd.flags |=
919 IEEE80211_STA_NULLFUNC_ACKED;
Vivek Natarajan375177b2010-02-09 14:50:28 +0530920 } else
921 mod_timer(&local->dynamic_ps_timer, jiffies +
922 msecs_to_jiffies(10));
923 }
924
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200925 ieee80211_report_used_skb(local, skb, false);
Johannes Berga729cff2011-11-06 14:13:34 +0100926
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100927 /* this was a transmitted frame, but now we want to reuse it */
928 skb_orphan(skb);
929
Felix Fietkaueaf55532010-03-11 16:28:24 +0100930 /* Need to make a copy before skb->cb gets cleared */
931 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100932 !(ieee80211_is_data(fc));
Felix Fietkaueaf55532010-03-11 16:28:24 +0100933
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100934 /*
935 * This is a bit racy but we can avoid a lot of work
936 * with this test...
937 */
Felix Fietkaueaf55532010-03-11 16:28:24 +0100938 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100939 dev_kfree_skb(skb);
940 return;
941 }
942
Helmut Schaa4dc792b2015-09-02 13:23:30 +0200943 /* send to monitor interfaces */
944 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100945}
946EXPORT_SYMBOL(ieee80211_tx_status);
Arik Nemtsov8178d382011-04-18 14:22:28 +0300947
948void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
949{
950 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
951 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
952 num_packets, GFP_ATOMIC);
953}
954EXPORT_SYMBOL(ieee80211_report_low_ack);
Johannes Berg6096de72011-11-04 11:18:10 +0100955
956void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
957{
Johannes Berga729cff2011-11-06 14:13:34 +0100958 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berga729cff2011-11-06 14:13:34 +0100959
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200960 ieee80211_report_used_skb(local, skb, true);
Johannes Berg6096de72011-11-04 11:18:10 +0100961 dev_kfree_skb_any(skb);
962}
963EXPORT_SYMBOL(ieee80211_free_txskb);
Felix Fietkau1f98ab72012-11-10 03:44:14 +0100964
965void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
966 struct sk_buff_head *skbs)
967{
968 struct sk_buff *skb;
969
970 while ((skb = __skb_dequeue(skbs)))
971 ieee80211_free_txskb(hw, skb);
972}