blob: 45628f37c083aa72575fcc0a0241b1aefc0cb5ad [file] [log] [blame]
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
54 /*
Johannes Berg697e6a02010-01-17 01:47:56 +010055 * This skb 'survived' a round-trip through the driver, and
56 * hopefully the driver didn't mangle it too badly. However,
Walter Goldens77c20612010-05-18 04:44:54 -070057 * we can definitely not rely on the control information
Johannes Bergc6fcf6b2010-01-17 01:47:59 +010058 * being correct. Clear it so we don't get junk there, and
59 * indicate that it needs new processing, but must not be
60 * modified/encrypted again.
Johannes Berg697e6a02010-01-17 01:47:56 +010061 */
62 memset(&info->control, 0, sizeof(info->control));
Johannes Berg18c94902010-01-25 19:07:39 +010063
64 info->control.jiffies = jiffies;
65 info->control.vif = &sta->sdata->vif;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +010066 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
67 IEEE80211_TX_INTFL_RETRANSMISSION;
Christian Lampartereb7d3062010-09-21 21:36:18 +020068 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg697e6a02010-01-17 01:47:56 +010069
Johannes Bergfe7a5d52009-11-18 18:42:47 +010070 sta->tx_filtered_count++;
71
Johannes Berg8a8656f2011-09-29 16:04:31 +020072 /*
73 * Clear more-data bit on filtered frames, it might be set
74 * but later frames might time out so it might have to be
75 * clear again ... It's all rather unlikely (this frame
76 * should time out first, right?) but let's not confuse
77 * peers unnecessarily.
78 */
79 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
80 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
81
Johannes Berg948d8872011-09-29 16:04:29 +020082 if (ieee80211_is_data_qos(hdr->frame_control)) {
Johannes Berg47086fc2011-09-29 16:04:33 +020083 u8 *p = ieee80211_get_qos_ctl(hdr);
84 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
85
86 /*
87 * Clear EOSP if set, this could happen e.g.
88 * if an absence period (us being a P2P GO)
89 * shortens the SP.
90 */
91 if (*p & IEEE80211_QOS_CTL_EOSP)
92 *p &= ~IEEE80211_QOS_CTL_EOSP;
Johannes Berg948d8872011-09-29 16:04:29 +020093 ac = ieee802_1d_to_ac[tid & 7];
94 } else {
95 ac = IEEE80211_AC_BE;
96 }
97
Johannes Bergfe7a5d52009-11-18 18:42:47 +010098 /*
99 * Clear the TX filter mask for this STA when sending the next
100 * packet. If the STA went to power save mode, this will happen
101 * when it wakes up for the next time.
102 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200103 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100104
105 /*
106 * This code races in the following way:
107 *
108 * (1) STA sends frame indicating it will go to sleep and does so
109 * (2) hardware/firmware adds STA to filter list, passes frame up
110 * (3) hardware/firmware processes TX fifo and suppresses a frame
111 * (4) we get TX status before having processed the frame and
112 * knowing that the STA has gone to sleep.
113 *
114 * This is actually quite unlikely even when both those events are
115 * processed from interrupts coming in quickly after one another or
116 * even at the same time because we queue both TX status events and
117 * RX frames to be processed by a tasklet and process them in the
118 * same order that they were received or TX status last. Hence, there
119 * is no race as long as the frame RX is processed before the next TX
120 * status, which drivers can ensure, see below.
121 *
122 * Note that this can only happen if the hardware or firmware can
123 * actually add STAs to the filter list, if this is done by the
124 * driver in response to set_tim() (which will only reduce the race
125 * this whole filtering tries to solve, not completely solve it)
126 * this situation cannot happen.
127 *
128 * To completely solve this race drivers need to make sure that they
129 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
130 * functions and
131 * (b) always process RX events before TX status events if ordering
132 * can be unknown, for example with different interrupt status
133 * bits.
Arik Nemtsovd057e5a2011-01-31 22:29:13 +0200134 * (c) if PS mode transitions are manual (i.e. the flag
135 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
136 * changes before calling TX status events if ordering can be
137 * unknown.
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100138 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200139 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg948d8872011-09-29 16:04:29 +0200140 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
141 skb_queue_tail(&sta->tx_filtered[ac], skb);
Johannes Bergc868cb352011-09-29 16:04:27 +0200142 sta_info_recalc_tim(sta);
Johannes Berg60750392011-09-29 16:04:28 +0200143
144 if (!timer_pending(&local->sta_cleanup))
145 mod_timer(&local->sta_cleanup,
146 round_jiffies(jiffies +
147 STA_INFO_CLEANUP_INTERVAL));
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100148 return;
149 }
150
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200151 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100152 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
153 /* Software retry the packet once */
154 info->flags |= IEEE80211_TX_INTFL_RETRIED;
155 ieee80211_add_pending_skb(local, skb);
156 return;
157 }
158
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200159 ps_dbg_ratelimited(sta->sdata,
160 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
161 skb_queue_len(&sta->tx_filtered[ac]),
162 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200163 ieee80211_free_txskb(&local->hw, skb);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100164}
165
Felix Fietkauf0425be2011-08-28 21:11:01 +0200166static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
167{
168 struct tid_ampdu_tx *tid_tx;
169
170 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
171 if (!tid_tx || !tid_tx->bar_pending)
172 return;
173
174 tid_tx->bar_pending = false;
Felix Fietkau8c771242011-08-20 15:53:55 +0200175 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
Felix Fietkauf0425be2011-08-28 21:11:01 +0200176}
177
Johannes Berg0f782312009-12-01 13:37:02 +0100178static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
179{
180 struct ieee80211_mgmt *mgmt = (void *) skb->data;
181 struct ieee80211_local *local = sta->local;
182 struct ieee80211_sub_if_data *sdata = sta->sdata;
183
Johannes Berg30686bf2015-06-02 21:39:54 +0200184 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
Felix Fietkau0c5b9322013-09-29 21:39:34 +0200185 sta->last_rx = jiffies;
186
Felix Fietkauf0425be2011-08-28 21:11:01 +0200187 if (ieee80211_is_data_qos(mgmt->frame_control)) {
188 struct ieee80211_hdr *hdr = (void *) skb->data;
189 u8 *qc = ieee80211_get_qos_ctl(hdr);
190 u16 tid = qc[0] & 0xf;
191
192 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
193 }
194
Johannes Berg0f782312009-12-01 13:37:02 +0100195 if (ieee80211_is_action(mgmt->frame_control) &&
Johannes Berg0f782312009-12-01 13:37:02 +0100196 mgmt->u.action.category == WLAN_CATEGORY_HT &&
Johannes Berg04ecd252012-09-11 14:34:12 +0200197 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
Johannes Berg04ecd252012-09-11 14:34:12 +0200198 ieee80211_sdata_running(sdata)) {
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300199 enum ieee80211_smps_mode smps_mode;
200
Johannes Berg0f782312009-12-01 13:37:02 +0100201 switch (mgmt->u.action.u.ht_smps.smps_control) {
202 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300203 smps_mode = IEEE80211_SMPS_DYNAMIC;
Johannes Berg0f782312009-12-01 13:37:02 +0100204 break;
205 case WLAN_HT_SMPS_CONTROL_STATIC:
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300206 smps_mode = IEEE80211_SMPS_STATIC;
Johannes Berg0f782312009-12-01 13:37:02 +0100207 break;
208 case WLAN_HT_SMPS_CONTROL_DISABLED:
209 default: /* shouldn't happen since we don't send that */
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300210 smps_mode = IEEE80211_SMPS_OFF;
Johannes Berg0f782312009-12-01 13:37:02 +0100211 break;
212 }
213
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300214 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
215 /*
216 * This update looks racy, but isn't -- if we come
217 * here we've definitely got a station that we're
218 * talking to, and on a managed interface that can
219 * only be the AP. And the only other place updating
220 * this variable in managed mode is before association.
221 */
222 sdata->smps_mode = smps_mode;
223 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
224 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
225 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
226 sta->known_smps_mode = smps_mode;
227 }
Johannes Berg0f782312009-12-01 13:37:02 +0100228 }
229}
230
Felix Fietkauf0425be2011-08-28 21:11:01 +0200231static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
232{
233 struct tid_ampdu_tx *tid_tx;
234
235 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
236 if (!tid_tx)
237 return;
238
239 tid_tx->failed_bar_ssn = ssn;
240 tid_tx->bar_pending = true;
241}
242
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200243static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
244{
245 int len = sizeof(struct ieee80211_radiotap_header);
246
247 /* IEEE80211_RADIOTAP_RATE rate */
248 if (info->status.rates[0].idx >= 0 &&
Karl Beldana8241312013-07-27 11:47:04 +0200249 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
250 IEEE80211_TX_RC_VHT_MCS)))
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200251 len += 2;
252
253 /* IEEE80211_RADIOTAP_TX_FLAGS */
254 len += 2;
255
256 /* IEEE80211_RADIOTAP_DATA_RETRIES */
257 len += 1;
258
Karl Beldana8241312013-07-27 11:47:04 +0200259 /* IEEE80211_RADIOTAP_MCS
260 * IEEE80211_RADIOTAP_VHT */
261 if (info->status.rates[0].idx >= 0) {
262 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
263 len += 3;
264 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
265 len = ALIGN(len, 2) + 12;
266 }
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200267
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200268 return len;
269}
270
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200271static void
Karl Beldana8241312013-07-27 11:47:04 +0200272ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
273 struct ieee80211_supported_band *sband,
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200274 struct sk_buff *skb, int retry_count,
275 int rtap_len, int shift)
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200276{
277 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
278 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
279 struct ieee80211_radiotap_header *rthdr;
280 unsigned char *pos;
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100281 u16 txflags;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200282
283 rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);
284
285 memset(rthdr, 0, rtap_len);
286 rthdr->it_len = cpu_to_le16(rtap_len);
287 rthdr->it_present =
288 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
289 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
290 pos = (unsigned char *)(rthdr + 1);
291
292 /*
293 * XXX: Once radiotap gets the bitmap reset thing the vendor
294 * extensions proposal contains, we can actually report
295 * the whole set of tries we did.
296 */
297
298 /* IEEE80211_RADIOTAP_RATE */
299 if (info->status.rates[0].idx >= 0 &&
Karl Beldana8241312013-07-27 11:47:04 +0200300 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
301 IEEE80211_TX_RC_VHT_MCS))) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200302 u16 rate;
303
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200304 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200305 rate = sband->bitrates[info->status.rates[0].idx].bitrate;
306 *pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200307 /* padding for tx flags */
308 pos += 2;
309 }
310
311 /* IEEE80211_RADIOTAP_TX_FLAGS */
312 txflags = 0;
313 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
314 !is_multicast_ether_addr(hdr->addr1))
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100315 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200316
Bob Copeland311ab8e2014-04-16 08:32:41 -0400317 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100318 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
Bob Copeland311ab8e2014-04-16 08:32:41 -0400319 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
Helmut Schaa9c8f2c42011-11-18 17:02:16 +0100320 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200321
322 put_unaligned_le16(txflags, pos);
323 pos += 2;
324
325 /* IEEE80211_RADIOTAP_DATA_RETRIES */
326 /* for now report the total retry_count */
327 *pos = retry_count;
328 pos++;
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200329
Karl Beldana8241312013-07-27 11:47:04 +0200330 if (info->status.rates[0].idx < 0)
331 return;
332
333 /* IEEE80211_RADIOTAP_MCS
334 * IEEE80211_RADIOTAP_VHT */
335 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200336 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
337 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
338 IEEE80211_RADIOTAP_MCS_HAVE_GI |
339 IEEE80211_RADIOTAP_MCS_HAVE_BW;
340 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
341 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
342 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
343 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
344 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
345 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
346 pos[2] = info->status.rates[0].idx;
347 pos += 3;
Karl Beldana8241312013-07-27 11:47:04 +0200348 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
349 u16 known = local->hw.radiotap_vht_details &
350 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
351 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
Helmut Schaa7f2a5e22011-10-11 18:08:55 +0200352
Karl Beldana8241312013-07-27 11:47:04 +0200353 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
354
355 /* required alignment from rthdr */
356 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
357
358 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
359 put_unaligned_le16(known, pos);
360 pos += 2;
361
362 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
363 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
364 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
365 pos++;
366
367 /* u8 bandwidth */
368 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
369 *pos = 1;
370 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
371 *pos = 4;
372 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
373 *pos = 11;
374 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
375 *pos = 0;
376 pos++;
377
378 /* u8 mcs_nss[4] */
379 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
380 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
381 pos += 4;
382
383 /* u8 coding */
384 pos++;
385 /* u8 group_id */
386 pos++;
387 /* u16 partial_aid */
388 pos += 2;
389 }
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200390}
391
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200392/*
393 * Handles the tx for TDLS teardown frames.
394 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
395 */
396static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
397 struct ieee80211_sub_if_data *sdata,
398 struct sk_buff *skb, u32 flags)
399{
400 struct sk_buff *teardown_skb;
401 struct sk_buff *orig_teardown_skb;
402 bool is_teardown = false;
403
404 /* Get the teardown data we need and free the lock */
405 spin_lock(&sdata->u.mgd.teardown_lock);
406 teardown_skb = sdata->u.mgd.teardown_skb;
407 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
408 if ((skb == orig_teardown_skb) && teardown_skb) {
409 sdata->u.mgd.teardown_skb = NULL;
410 sdata->u.mgd.orig_teardown_skb = NULL;
411 is_teardown = true;
412 }
413 spin_unlock(&sdata->u.mgd.teardown_lock);
414
415 if (is_teardown) {
416 /* This mechanism relies on being able to get ACKs */
Johannes Berg30686bf2015-06-02 21:39:54 +0200417 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200418
419 /* Check if peer has ACKed */
420 if (flags & IEEE80211_TX_STAT_ACK) {
421 dev_kfree_skb_any(teardown_skb);
422 } else {
423 tdls_dbg(sdata,
424 "TDLS Resending teardown through AP\n");
425
426 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
427 }
428 }
429}
430
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200431static struct ieee80211_sub_if_data *
432ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
433{
434 struct ieee80211_sub_if_data *sdata;
435
436 if (skb->dev) {
437 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
438 if (!sdata->dev)
439 continue;
440
441 if (skb->dev == sdata->dev)
442 return sdata;
443 }
444
445 return NULL;
446 }
447
448 return rcu_dereference(local->p2p_sdata);
449}
450
451static void ieee80211_report_ack_skb(struct ieee80211_local *local,
452 struct ieee80211_tx_info *info,
453 bool acked, bool dropped)
454{
455 struct sk_buff *skb;
456 unsigned long flags;
457
458 spin_lock_irqsave(&local->ack_status_lock, flags);
459 skb = idr_find(&local->ack_status_frames, info->ack_frame_id);
460 if (skb)
461 idr_remove(&local->ack_status_frames, info->ack_frame_id);
462 spin_unlock_irqrestore(&local->ack_status_lock, flags);
463
464 if (!skb)
465 return;
466
467 if (dropped) {
468 dev_kfree_skb_any(skb);
469 return;
470 }
471
472 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
Johannes Berg3b79af92015-06-01 23:14:59 +0200473 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200474 struct ieee80211_sub_if_data *sdata;
Johannes Berg3b79af92015-06-01 23:14:59 +0200475 struct ieee80211_hdr *hdr = (void *)skb->data;
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200476
477 rcu_read_lock();
478 sdata = ieee80211_sdata_from_skb(local, skb);
Johannes Berg3b79af92015-06-01 23:14:59 +0200479 if (sdata) {
480 if (ieee80211_is_nullfunc(hdr->frame_control) ||
481 ieee80211_is_qos_nullfunc(hdr->frame_control))
482 cfg80211_probe_status(sdata->dev, hdr->addr1,
483 cookie, acked,
484 GFP_ATOMIC);
485 else
486 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
487 skb->data, skb->len,
488 acked, GFP_ATOMIC);
489 }
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200490 rcu_read_unlock();
491
492 dev_kfree_skb_any(skb);
493 } else {
494 /* consumes skb */
495 skb_complete_wifi_ack(skb, acked);
496 }
497}
498
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200499static void ieee80211_report_used_skb(struct ieee80211_local *local,
500 struct sk_buff *skb, bool dropped)
501{
502 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
503 struct ieee80211_hdr *hdr = (void *)skb->data;
504 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
505
506 if (dropped)
507 acked = false;
508
Johannes Berg3b79af92015-06-01 23:14:59 +0200509 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200510 struct ieee80211_sub_if_data *sdata;
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200511
512 rcu_read_lock();
513
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200514 sdata = ieee80211_sdata_from_skb(local, skb);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200515
Johannes Berg1672c0e32013-01-29 15:02:27 +0100516 if (!sdata) {
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200517 skb->dev = NULL;
Johannes Berg1672c0e32013-01-29 15:02:27 +0100518 } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
Liad Kaufman1277b4a2014-11-09 18:50:08 +0200519 unsigned int hdr_size =
520 ieee80211_hdrlen(hdr->frame_control);
521
522 /* Check to see if packet is a TDLS teardown packet */
523 if (ieee80211_is_data(hdr->frame_control) &&
524 (ieee80211_get_tdls_action(skb, hdr_size) ==
525 WLAN_TDLS_TEARDOWN))
526 ieee80211_tdls_td_tx_handle(local, sdata, skb,
527 info->flags);
528 else
529 ieee80211_mgd_conn_tx_status(sdata,
530 hdr->frame_control,
531 acked);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200532 } else {
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200533 /* we assign ack frame ID for the others */
534 WARN_ON(1);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200535 }
536
537 rcu_read_unlock();
Johannes Bergb2eb0ee2015-06-01 22:54:13 +0200538 } else if (info->ack_frame_id) {
539 ieee80211_report_ack_skb(local, info, acked, dropped);
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200540 }
541}
542
Johannes Berg99ba2a12010-11-24 08:10:06 +0100543/*
544 * Use a static threshold for now, best value to be determined
545 * by testing ...
546 * Should it depend on:
547 * - on # of retransmissions
548 * - current throughput (higher value for higher tpt)?
549 */
550#define STA_LOST_PKT_THRESHOLD 50
Liad Kaufman9d58f252014-09-04 08:28:40 +0300551#define STA_LOST_TDLS_PKT_THRESHOLD 10
552#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
Johannes Berg99ba2a12010-11-24 08:10:06 +0100553
Felix Fietkauad9dda62014-11-19 20:08:11 +0100554static void ieee80211_lost_packet(struct sta_info *sta,
555 struct ieee80211_tx_info *info)
Felix Fietkauabd43a62014-05-23 20:05:28 +0200556{
Felix Fietkauabd43a62014-05-23 20:05:28 +0200557 /* This packet was aggregated but doesn't carry status info */
558 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
559 !(info->flags & IEEE80211_TX_STAT_AMPDU))
560 return;
561
Liad Kaufman9d58f252014-09-04 08:28:40 +0300562 sta->lost_packets++;
563 if (!sta->sta.tdls && sta->lost_packets < STA_LOST_PKT_THRESHOLD)
564 return;
565
566 /*
567 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
568 * of the last packets were lost, and that no ACK was received in the
569 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
570 * mechanism.
571 */
572 if (sta->sta.tdls &&
573 (sta->lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
574 time_before(jiffies,
575 sta->last_tdls_pkt_time + STA_LOST_TDLS_PKT_TIME)))
Felix Fietkauabd43a62014-05-23 20:05:28 +0200576 return;
577
578 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
579 sta->lost_packets, GFP_ATOMIC);
580 sta->lost_packets = 0;
581}
582
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100583static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
584 struct ieee80211_tx_info *info,
585 int *retry_count)
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100586{
Juuso Oikarinen0c869802010-04-22 10:27:48 +0300587 int rates_idx = -1;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100588 int count = -1;
589 int i;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100590
591 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
Lorenzo Bianconid01b3162012-04-06 20:48:15 +0200592 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
593 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
594 /* just the first aggr frame carry status info */
595 info->status.rates[i].idx = -1;
596 info->status.rates[i].count = 0;
597 break;
598 } else if (info->status.rates[i].idx < 0) {
Helmut Schaabe7974a2011-03-21 15:07:55 +0100599 break;
600 } else if (i >= hw->max_report_rates) {
601 /* the HW cannot have attempted that rate */
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100602 info->status.rates[i].idx = -1;
603 info->status.rates[i].count = 0;
Helmut Schaabe7974a2011-03-21 15:07:55 +0100604 break;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100605 }
606
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100607 count += info->status.rates[i].count;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100608 }
Helmut Schaabe7974a2011-03-21 15:07:55 +0100609 rates_idx = i - 1;
610
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100611 if (count < 0)
612 count = 0;
613
614 *retry_count = count;
615 return rates_idx;
616}
617
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100618void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
619 struct ieee80211_sta *pubsta,
620 struct ieee80211_tx_info *info)
621{
622 struct ieee80211_local *local = hw_to_local(hw);
623 struct ieee80211_supported_band *sband;
624 int retry_count;
625 int rates_idx;
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530626 bool acked, noack_success;
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100627
628 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
629
630 sband = hw->wiphy->bands[info->band];
631
632 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530633 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
634
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100635 if (pubsta) {
636 struct sta_info *sta;
637
638 sta = container_of(pubsta, struct sta_info, sta);
639
640 if (!acked)
641 sta->tx_retry_failed++;
642 sta->tx_retry_count += retry_count;
643
644 if (acked) {
645 sta->last_rx = jiffies;
646
647 if (sta->lost_packets)
648 sta->lost_packets = 0;
649
650 /* Track when last TDLS packet was ACKed */
651 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
652 sta->last_tdls_pkt_time = jiffies;
653 } else {
654 ieee80211_lost_packet(sta, info);
655 }
656
657 rate_control_tx_status_noskb(local, sband, sta, info);
658 }
659
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530660 if (acked || noack_success) {
Johannes Bergc206ca62015-04-22 20:47:28 +0200661 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
662 if (!pubsta)
663 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
664 if (retry_count > 0)
665 I802_DEBUG_INC(local->dot11RetryCount);
666 if (retry_count > 1)
667 I802_DEBUG_INC(local->dot11MultipleRetryCount);
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100668 } else {
Johannes Bergc206ca62015-04-22 20:47:28 +0200669 I802_DEBUG_INC(local->dot11FailedCount);
Felix Fietkauf027c2a2014-11-19 20:08:13 +0100670 }
671}
672EXPORT_SYMBOL(ieee80211_tx_status_noskb);
673
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100674void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
675{
676 struct sk_buff *skb2;
677 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
678 struct ieee80211_local *local = hw_to_local(hw);
679 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
680 __le16 fc;
681 struct ieee80211_supported_band *sband;
682 struct ieee80211_sub_if_data *sdata;
683 struct net_device *prev_dev = NULL;
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100684 struct sta_info *sta;
685 struct rhash_head *tmp;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100686 int retry_count;
687 int rates_idx;
688 bool send_to_cooked;
689 bool acked;
690 struct ieee80211_bar *bar;
691 int rtap_len;
692 int shift = 0;
Johannes Berg5e06a9e2015-01-16 13:27:56 +0100693 int tid = IEEE80211_NUM_TIDS;
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100694 const struct bucket_table *tbl;
Felix Fietkau7e1cdcb2014-11-19 20:08:12 +0100695
696 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100697
698 rcu_read_lock();
699
700 sband = local->hw.wiphy->bands[info->band];
Vivek Natarajan375177b2010-02-09 14:50:28 +0530701 fc = hdr->frame_control;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100702
Johannes Berg7bedd0c2015-02-13 21:55:15 +0100703 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
704
705 for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) {
Johannes Bergabe60632009-11-25 17:46:18 +0100706 /* skip wrong virtual interface */
Joe Perchesb203ca32012-05-08 18:56:52 +0000707 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
Johannes Bergabe60632009-11-25 17:46:18 +0100708 continue;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100709
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200710 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
711
Johannes Berg47086fc2011-09-29 16:04:33 +0200712 if (info->flags & IEEE80211_TX_STATUS_EOSP)
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200713 clear_sta_flag(sta, WLAN_STA_SP);
Johannes Berg47086fc2011-09-29 16:04:33 +0200714
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100715 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200716 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100717 /*
718 * The STA is in power save mode, so assume
719 * that this TX packet failed because of that.
720 */
721 ieee80211_handle_filtered_frame(local, sta, skb);
722 rcu_read_unlock();
723 return;
724 }
725
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100726 /* mesh Peer Service Period support */
727 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
728 ieee80211_is_data_qos(fc))
729 ieee80211_mpsp_trigger_process(
730 ieee80211_get_qos_ctl(hdr),
731 sta, true, acked);
732
Johannes Berg30686bf2015-06-02 21:39:54 +0200733 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
Chun-Yeow Yeoh00a9a6d2014-04-02 12:05:09 +0800734 (ieee80211_is_data(hdr->frame_control)) &&
Juuso Oikarinen0c869802010-04-22 10:27:48 +0300735 (rates_idx != -1))
736 sta->last_tx_rate = info->status.rates[rates_idx];
737
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100738 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
739 (ieee80211_is_data_qos(fc))) {
Johannes Berg79c892b2014-11-21 14:26:31 +0100740 u16 ssn;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100741 u8 *qc;
742
743 qc = ieee80211_get_qos_ctl(hdr);
744 tid = qc[0] & 0xf;
745 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
746 & IEEE80211_SCTL_SEQ);
Felix Fietkau8c771242011-08-20 15:53:55 +0200747 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100748 tid, ssn);
Johannes Berg79c892b2014-11-21 14:26:31 +0100749 } else if (ieee80211_is_data_qos(fc)) {
750 u8 *qc = ieee80211_get_qos_ctl(hdr);
751
752 tid = qc[0] & 0xf;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100753 }
754
Helmut Schaae69dede2011-08-11 16:17:42 +0200755 if (!acked && ieee80211_is_back_req(fc)) {
Johannes Berg79c892b2014-11-21 14:26:31 +0100756 u16 control;
Felix Fietkau71076762011-09-15 09:37:46 +0200757
Helmut Schaae69dede2011-08-11 16:17:42 +0200758 /*
Felix Fietkau71076762011-09-15 09:37:46 +0200759 * BAR failed, store the last SSN and retry sending
760 * the BAR when the next unicast transmission on the
761 * same TID succeeds.
Helmut Schaae69dede2011-08-11 16:17:42 +0200762 */
763 bar = (struct ieee80211_bar *) skb->data;
Felix Fietkau71076762011-09-15 09:37:46 +0200764 control = le16_to_cpu(bar->control);
765 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
Felix Fietkauf0425be2011-08-28 21:11:01 +0200766 u16 ssn = le16_to_cpu(bar->start_seq_num);
767
Felix Fietkau71076762011-09-15 09:37:46 +0200768 tid = (control &
Helmut Schaae69dede2011-08-11 16:17:42 +0200769 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
770 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200771
Stanislaw Gruszka8df6b7b2013-01-28 14:42:30 +0100772 ieee80211_set_bar_pending(sta, tid, ssn);
Helmut Schaae69dede2011-08-11 16:17:42 +0200773 }
774 }
775
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100776 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
777 ieee80211_handle_filtered_frame(local, sta, skb);
778 rcu_read_unlock();
779 return;
780 } else {
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100781 if (!acked)
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100782 sta->tx_retry_failed++;
783 sta->tx_retry_count += retry_count;
Johannes Berg79c892b2014-11-21 14:26:31 +0100784
785 if (ieee80211_is_data_present(fc)) {
786 if (!acked)
787 sta->tx_msdu_failed[tid]++;
788 sta->tx_msdu_retries[tid] += retry_count;
789 }
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100790 }
791
792 rate_control_tx_status(local, sband, sta, skb);
793 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
794 ieee80211s_update_metric(local, sta, skb);
Johannes Berg0f782312009-12-01 13:37:02 +0100795
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100796 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
Johannes Berg0f782312009-12-01 13:37:02 +0100797 ieee80211_frame_acked(sta, skb);
Johannes Berg99ba2a12010-11-24 08:10:06 +0100798
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100799 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
Johannes Berg30686bf2015-06-02 21:39:54 +0200800 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
Johannes Berg02219b32014-10-07 10:38:50 +0300801 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
802 acked, info->status.tx_time);
Felix Fietkau04ac3c02010-12-02 21:01:08 +0100803
Johannes Berg30686bf2015-06-02 21:39:54 +0200804 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
Johannes Berg99ba2a12010-11-24 08:10:06 +0100805 if (info->flags & IEEE80211_TX_STAT_ACK) {
806 if (sta->lost_packets)
807 sta->lost_packets = 0;
Liad Kaufman9d58f252014-09-04 08:28:40 +0300808
809 /* Track when last TDLS packet was ACKed */
810 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
811 sta->last_tdls_pkt_time = jiffies;
Felix Fietkauabd43a62014-05-23 20:05:28 +0200812 } else {
Felix Fietkauad9dda62014-11-19 20:08:11 +0100813 ieee80211_lost_packet(sta, info);
Johannes Berg99ba2a12010-11-24 08:10:06 +0100814 }
815 }
Saravanadb943572012-11-28 18:27:09 +0530816
817 if (acked)
818 sta->last_ack_signal = info->status.ack_signal;
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100819 }
820
821 rcu_read_unlock();
822
Fabio Baltierie47f2502013-07-25 12:00:26 +0200823 ieee80211_led_tx(local);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100824
825 /* SNMP counters
826 * Fragments are passed to low-level drivers as separate skbs, so these
827 * are actually fragments, not frames. Update frame counters only for
828 * the first fragment of the frame. */
Sujith Manoharan5cf16612014-12-10 21:26:11 +0530829 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
830 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100831 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
Johannes Bergc206ca62015-04-22 20:47:28 +0200832 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
Eliad Peller85b89af2014-12-21 15:25:28 +0200833 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
Johannes Bergc206ca62015-04-22 20:47:28 +0200834 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100835 if (retry_count > 0)
Johannes Bergc206ca62015-04-22 20:47:28 +0200836 I802_DEBUG_INC(local->dot11RetryCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100837 if (retry_count > 1)
Johannes Bergc206ca62015-04-22 20:47:28 +0200838 I802_DEBUG_INC(local->dot11MultipleRetryCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100839 }
840
841 /* This counter shall be incremented for an acknowledged MPDU
842 * with an individual address in the address 1 field or an MPDU
843 * with a multicast address in the address 1 field of type Data
844 * or Management. */
845 if (!is_multicast_ether_addr(hdr->addr1) ||
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100846 ieee80211_is_data(fc) ||
847 ieee80211_is_mgmt(fc))
Johannes Bergc206ca62015-04-22 20:47:28 +0200848 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100849 } else {
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100850 if (ieee80211_is_first_frag(hdr->seq_ctrl))
Johannes Bergc206ca62015-04-22 20:47:28 +0200851 I802_DEBUG_INC(local->dot11FailedCount);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100852 }
853
Vivek Natarajan375177b2010-02-09 14:50:28 +0530854 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
Johannes Berg30686bf2015-06-02 21:39:54 +0200855 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
Vivek Natarajan375177b2010-02-09 14:50:28 +0530856 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
857 local->ps_sdata && !(local->scanning)) {
858 if (info->flags & IEEE80211_TX_STAT_ACK) {
859 local->ps_sdata->u.mgd.flags |=
860 IEEE80211_STA_NULLFUNC_ACKED;
Vivek Natarajan375177b2010-02-09 14:50:28 +0530861 } else
862 mod_timer(&local->dynamic_ps_timer, jiffies +
863 msecs_to_jiffies(10));
864 }
865
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200866 ieee80211_report_used_skb(local, skb, false);
Johannes Berga729cff2011-11-06 14:13:34 +0100867
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100868 /* this was a transmitted frame, but now we want to reuse it */
869 skb_orphan(skb);
870
Felix Fietkaueaf55532010-03-11 16:28:24 +0100871 /* Need to make a copy before skb->cb gets cleared */
872 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
Helmut Schaaadf5ace2011-12-08 13:11:55 +0100873 !(ieee80211_is_data(fc));
Felix Fietkaueaf55532010-03-11 16:28:24 +0100874
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100875 /*
876 * This is a bit racy but we can avoid a lot of work
877 * with this test...
878 */
Felix Fietkaueaf55532010-03-11 16:28:24 +0100879 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100880 dev_kfree_skb(skb);
881 return;
882 }
883
884 /* send frame to monitor interfaces now */
Helmut Schaaa2fe8162011-10-11 18:08:54 +0200885 rtap_len = ieee80211_tx_radiotap_len(info);
886 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
Joe Perchesf0d23202012-05-15 14:20:30 -0700887 pr_err("ieee80211_tx_status: headroom too small\n");
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100888 dev_kfree_skb(skb);
889 return;
890 }
Karl Beldana8241312013-07-27 11:47:04 +0200891 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
892 rtap_len, shift);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100893
894 /* XXX: is this sufficient for BPF? */
895 skb_set_mac_header(skb, 0);
896 skb->ip_summed = CHECKSUM_UNNECESSARY;
897 skb->pkt_type = PACKET_OTHERHOST;
898 skb->protocol = htons(ETH_P_802_2);
899 memset(skb->cb, 0, sizeof(skb->cb));
900
901 rcu_read_lock();
902 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
903 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
Johannes Berg9607e6b2009-12-23 13:15:31 +0100904 if (!ieee80211_sdata_running(sdata))
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100905 continue;
906
907 if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
Felix Fietkaueaf55532010-03-11 16:28:24 +0100908 !send_to_cooked)
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100909 continue;
910
911 if (prev_dev) {
912 skb2 = skb_clone(skb, GFP_ATOMIC);
913 if (skb2) {
914 skb2->dev = prev_dev;
John W. Linville4efe7f52010-10-07 11:35:40 -0400915 netif_rx(skb2);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100916 }
917 }
918
919 prev_dev = sdata->dev;
920 }
921 }
922 if (prev_dev) {
923 skb->dev = prev_dev;
John W. Linville4efe7f52010-10-07 11:35:40 -0400924 netif_rx(skb);
Johannes Bergfe7a5d52009-11-18 18:42:47 +0100925 skb = NULL;
926 }
927 rcu_read_unlock();
928 dev_kfree_skb(skb);
929}
930EXPORT_SYMBOL(ieee80211_tx_status);
Arik Nemtsov8178d382011-04-18 14:22:28 +0300931
932void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
933{
934 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
935 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
936 num_packets, GFP_ATOMIC);
937}
938EXPORT_SYMBOL(ieee80211_report_low_ack);
Johannes Berg6096de72011-11-04 11:18:10 +0100939
940void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
941{
Johannes Berga729cff2011-11-06 14:13:34 +0100942 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berga729cff2011-11-06 14:13:34 +0100943
Johannes Berg8a2fbed2012-10-26 15:53:06 +0200944 ieee80211_report_used_skb(local, skb, true);
Johannes Berg6096de72011-11-04 11:18:10 +0100945 dev_kfree_skb_any(skb);
946}
947EXPORT_SYMBOL(ieee80211_free_txskb);
Felix Fietkau1f98ab72012-11-10 03:44:14 +0100948
949void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
950 struct sk_buff_head *skbs)
951{
952 struct sk_buff *skb;
953
954 while ((skb = __skb_dequeue(skbs)))
955 ieee80211_free_txskb(hw, skb);
956}