2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
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.
13 #include <linux/export.h>
14 #include <linux/etherdevice.h>
15 #include <net/mac80211.h>
16 #include <asm/unaligned.h>
17 #include "ieee80211_i.h"
24 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
27 struct ieee80211_local *local = hw_to_local(hw);
28 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
31 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
32 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
33 &local->skb_queue : &local->skb_queue_unreliable, skb);
34 tmp = skb_queue_len(&local->skb_queue) +
35 skb_queue_len(&local->skb_queue_unreliable);
36 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
37 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
38 ieee80211_free_txskb(hw, skb);
40 I802_DEBUG_INC(local->tx_status_drop);
42 tasklet_schedule(&local->tasklet);
44 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
46 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
50 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
51 struct ieee80211_hdr *hdr = (void *)skb->data;
55 * This skb 'survived' a round-trip through the driver, and
56 * hopefully the driver didn't mangle it too badly. However,
57 * we can definitely not rely on the control information
58 * 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.
62 memset(&info->control, 0, sizeof(info->control));
64 info->control.jiffies = jiffies;
65 info->control.vif = &sta->sdata->vif;
66 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
67 IEEE80211_TX_INTFL_RETRANSMISSION;
68 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
70 sta->status_stats.filtered++;
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.
79 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
80 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
82 if (ieee80211_is_data_qos(hdr->frame_control)) {
83 u8 *p = ieee80211_get_qos_ctl(hdr);
84 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
87 * Clear EOSP if set, this could happen e.g.
88 * if an absence period (us being a P2P GO)
91 if (*p & IEEE80211_QOS_CTL_EOSP)
92 *p &= ~IEEE80211_QOS_CTL_EOSP;
93 ac = ieee802_1d_to_ac[tid & 7];
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.
103 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
104 ieee80211_clear_fast_xmit(sta);
107 * This code races in the following way:
109 * (1) STA sends frame indicating it will go to sleep and does so
110 * (2) hardware/firmware adds STA to filter list, passes frame up
111 * (3) hardware/firmware processes TX fifo and suppresses a frame
112 * (4) we get TX status before having processed the frame and
113 * knowing that the STA has gone to sleep.
115 * This is actually quite unlikely even when both those events are
116 * processed from interrupts coming in quickly after one another or
117 * even at the same time because we queue both TX status events and
118 * RX frames to be processed by a tasklet and process them in the
119 * same order that they were received or TX status last. Hence, there
120 * is no race as long as the frame RX is processed before the next TX
121 * status, which drivers can ensure, see below.
123 * Note that this can only happen if the hardware or firmware can
124 * actually add STAs to the filter list, if this is done by the
125 * driver in response to set_tim() (which will only reduce the race
126 * this whole filtering tries to solve, not completely solve it)
127 * this situation cannot happen.
129 * To completely solve this race drivers need to make sure that they
130 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
132 * (b) always process RX events before TX status events if ordering
133 * can be unknown, for example with different interrupt status
135 * (c) if PS mode transitions are manual (i.e. the flag
136 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
137 * changes before calling TX status events if ordering can be
140 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
141 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
142 skb_queue_tail(&sta->tx_filtered[ac], skb);
143 sta_info_recalc_tim(sta);
145 if (!timer_pending(&local->sta_cleanup))
146 mod_timer(&local->sta_cleanup,
147 round_jiffies(jiffies +
148 STA_INFO_CLEANUP_INTERVAL));
152 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
153 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
154 /* Software retry the packet once */
155 info->flags |= IEEE80211_TX_INTFL_RETRIED;
156 ieee80211_add_pending_skb(local, skb);
160 ps_dbg_ratelimited(sta->sdata,
161 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
162 skb_queue_len(&sta->tx_filtered[ac]),
163 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
164 ieee80211_free_txskb(&local->hw, skb);
167 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
169 struct tid_ampdu_tx *tid_tx;
171 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
172 if (!tid_tx || !tid_tx->bar_pending)
175 tid_tx->bar_pending = false;
176 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
179 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
181 struct ieee80211_mgmt *mgmt = (void *) skb->data;
182 struct ieee80211_local *local = sta->local;
183 struct ieee80211_sub_if_data *sdata = sta->sdata;
185 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
186 sta->rx_stats.last_rx = jiffies;
188 if (ieee80211_is_data_qos(mgmt->frame_control)) {
189 struct ieee80211_hdr *hdr = (void *) skb->data;
190 u8 *qc = ieee80211_get_qos_ctl(hdr);
191 u16 tid = qc[0] & 0xf;
193 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
196 if (ieee80211_is_action(mgmt->frame_control) &&
197 mgmt->u.action.category == WLAN_CATEGORY_HT &&
198 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
199 ieee80211_sdata_running(sdata)) {
200 enum ieee80211_smps_mode smps_mode;
202 switch (mgmt->u.action.u.ht_smps.smps_control) {
203 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
204 smps_mode = IEEE80211_SMPS_DYNAMIC;
206 case WLAN_HT_SMPS_CONTROL_STATIC:
207 smps_mode = IEEE80211_SMPS_STATIC;
209 case WLAN_HT_SMPS_CONTROL_DISABLED:
210 default: /* shouldn't happen since we don't send that */
211 smps_mode = IEEE80211_SMPS_OFF;
215 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
217 * This update looks racy, but isn't -- if we come
218 * here we've definitely got a station that we're
219 * talking to, and on a managed interface that can
220 * only be the AP. And the only other place updating
221 * this variable in managed mode is before association.
223 sdata->smps_mode = smps_mode;
224 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
225 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
226 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
227 sta->known_smps_mode = smps_mode;
232 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
234 struct tid_ampdu_tx *tid_tx;
236 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
240 tid_tx->failed_bar_ssn = ssn;
241 tid_tx->bar_pending = true;
244 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
246 int len = sizeof(struct ieee80211_radiotap_header);
248 /* IEEE80211_RADIOTAP_RATE rate */
249 if (info->status.rates[0].idx >= 0 &&
250 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
251 IEEE80211_TX_RC_VHT_MCS)))
254 /* IEEE80211_RADIOTAP_TX_FLAGS */
257 /* IEEE80211_RADIOTAP_DATA_RETRIES */
260 /* IEEE80211_RADIOTAP_MCS
261 * IEEE80211_RADIOTAP_VHT */
262 if (info->status.rates[0].idx >= 0) {
263 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
265 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
266 len = ALIGN(len, 2) + 12;
273 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
274 struct ieee80211_supported_band *sband,
275 struct sk_buff *skb, int retry_count,
276 int rtap_len, int shift)
278 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
279 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
280 struct ieee80211_radiotap_header *rthdr;
284 rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);
286 memset(rthdr, 0, rtap_len);
287 rthdr->it_len = cpu_to_le16(rtap_len);
289 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
290 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
291 pos = (unsigned char *)(rthdr + 1);
294 * XXX: Once radiotap gets the bitmap reset thing the vendor
295 * extensions proposal contains, we can actually report
296 * the whole set of tries we did.
299 /* IEEE80211_RADIOTAP_RATE */
300 if (info->status.rates[0].idx >= 0 &&
301 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
302 IEEE80211_TX_RC_VHT_MCS))) {
305 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
306 rate = sband->bitrates[info->status.rates[0].idx].bitrate;
307 *pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
308 /* padding for tx flags */
312 /* IEEE80211_RADIOTAP_TX_FLAGS */
314 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
315 !is_multicast_ether_addr(hdr->addr1))
316 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
318 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
319 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
320 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
321 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
323 put_unaligned_le16(txflags, pos);
326 /* IEEE80211_RADIOTAP_DATA_RETRIES */
327 /* for now report the total retry_count */
331 if (info->status.rates[0].idx < 0)
334 /* IEEE80211_RADIOTAP_MCS
335 * IEEE80211_RADIOTAP_VHT */
336 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
337 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
338 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
339 IEEE80211_RADIOTAP_MCS_HAVE_GI |
340 IEEE80211_RADIOTAP_MCS_HAVE_BW;
341 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
342 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
343 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
344 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
345 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
346 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
347 pos[2] = info->status.rates[0].idx;
349 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
350 u16 known = local->hw.radiotap_vht_details &
351 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
352 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
354 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
356 /* required alignment from rthdr */
357 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
359 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
360 put_unaligned_le16(known, pos);
363 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
364 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
365 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
369 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
371 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
373 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
375 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
380 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
381 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
388 /* u16 partial_aid */
394 * Handles the tx for TDLS teardown frames.
395 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
397 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
398 struct ieee80211_sub_if_data *sdata,
399 struct sk_buff *skb, u32 flags)
401 struct sk_buff *teardown_skb;
402 struct sk_buff *orig_teardown_skb;
403 bool is_teardown = false;
405 /* Get the teardown data we need and free the lock */
406 spin_lock(&sdata->u.mgd.teardown_lock);
407 teardown_skb = sdata->u.mgd.teardown_skb;
408 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
409 if ((skb == orig_teardown_skb) && teardown_skb) {
410 sdata->u.mgd.teardown_skb = NULL;
411 sdata->u.mgd.orig_teardown_skb = NULL;
414 spin_unlock(&sdata->u.mgd.teardown_lock);
417 /* This mechanism relies on being able to get ACKs */
418 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
420 /* Check if peer has ACKed */
421 if (flags & IEEE80211_TX_STAT_ACK) {
422 dev_kfree_skb_any(teardown_skb);
425 "TDLS Resending teardown through AP\n");
427 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
432 static struct ieee80211_sub_if_data *
433 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
435 struct ieee80211_sub_if_data *sdata;
438 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
442 if (skb->dev == sdata->dev)
449 return rcu_dereference(local->p2p_sdata);
452 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
453 struct ieee80211_tx_info *info,
454 bool acked, bool dropped)
459 spin_lock_irqsave(&local->ack_status_lock, flags);
460 skb = idr_find(&local->ack_status_frames, info->ack_frame_id);
462 idr_remove(&local->ack_status_frames, info->ack_frame_id);
463 spin_unlock_irqrestore(&local->ack_status_lock, flags);
469 dev_kfree_skb_any(skb);
473 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
474 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
475 struct ieee80211_sub_if_data *sdata;
476 struct ieee80211_hdr *hdr = (void *)skb->data;
479 sdata = ieee80211_sdata_from_skb(local, skb);
481 if (ieee80211_is_nullfunc(hdr->frame_control) ||
482 ieee80211_is_qos_nullfunc(hdr->frame_control))
483 cfg80211_probe_status(sdata->dev, hdr->addr1,
487 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
493 dev_kfree_skb_any(skb);
496 skb_complete_wifi_ack(skb, acked);
500 static void ieee80211_report_used_skb(struct ieee80211_local *local,
501 struct sk_buff *skb, bool dropped)
503 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
504 struct ieee80211_hdr *hdr = (void *)skb->data;
505 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
510 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
511 struct ieee80211_sub_if_data *sdata;
515 sdata = ieee80211_sdata_from_skb(local, skb);
520 unsigned int hdr_size =
521 ieee80211_hdrlen(hdr->frame_control);
523 /* Check to see if packet is a TDLS teardown packet */
524 if (ieee80211_is_data(hdr->frame_control) &&
525 (ieee80211_get_tdls_action(skb, hdr_size) ==
527 ieee80211_tdls_td_tx_handle(local, sdata, skb,
530 ieee80211_mgd_conn_tx_status(sdata,
536 } else if (info->ack_frame_id) {
537 ieee80211_report_ack_skb(local, info, acked, dropped);
542 * Use a static threshold for now, best value to be determined
544 * Should it depend on:
545 * - on # of retransmissions
546 * - current throughput (higher value for higher tpt)?
548 #define STA_LOST_PKT_THRESHOLD 50
549 #define STA_LOST_TDLS_PKT_THRESHOLD 10
550 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
552 static void ieee80211_lost_packet(struct sta_info *sta,
553 struct ieee80211_tx_info *info)
555 /* This packet was aggregated but doesn't carry status info */
556 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
557 !(info->flags & IEEE80211_TX_STAT_AMPDU))
560 sta->status_stats.lost_packets++;
561 if (!sta->sta.tdls &&
562 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
566 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
567 * of the last packets were lost, and that no ACK was received in the
568 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
572 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
574 sta->status_stats.last_tdls_pkt_time +
575 STA_LOST_TDLS_PKT_TIME)))
578 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
579 sta->status_stats.lost_packets, GFP_ATOMIC);
580 sta->status_stats.lost_packets = 0;
583 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
584 struct ieee80211_tx_info *info,
591 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
592 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;
598 } else if (info->status.rates[i].idx < 0) {
600 } else if (i >= hw->max_report_rates) {
601 /* the HW cannot have attempted that rate */
602 info->status.rates[i].idx = -1;
603 info->status.rates[i].count = 0;
607 count += info->status.rates[i].count;
614 *retry_count = count;
618 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
619 struct ieee80211_sta *pubsta,
620 struct ieee80211_tx_info *info)
622 struct ieee80211_local *local = hw_to_local(hw);
623 struct ieee80211_supported_band *sband;
626 bool acked, noack_success;
628 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
630 sband = hw->wiphy->bands[info->band];
632 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
633 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
636 struct sta_info *sta;
638 sta = container_of(pubsta, struct sta_info, sta);
641 sta->status_stats.retry_failed++;
642 sta->status_stats.retry_count += retry_count;
645 sta->rx_stats.last_rx = jiffies;
647 if (sta->status_stats.lost_packets)
648 sta->status_stats.lost_packets = 0;
650 /* Track when last TDLS packet was ACKed */
651 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
652 sta->status_stats.last_tdls_pkt_time = jiffies;
654 ieee80211_lost_packet(sta, info);
657 rate_control_tx_status_noskb(local, sband, sta, info);
660 if (acked || noack_success) {
661 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
663 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
665 I802_DEBUG_INC(local->dot11RetryCount);
667 I802_DEBUG_INC(local->dot11MultipleRetryCount);
669 I802_DEBUG_INC(local->dot11FailedCount);
672 EXPORT_SYMBOL(ieee80211_tx_status_noskb);
674 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
675 struct ieee80211_supported_band *sband,
676 int retry_count, int shift, bool send_to_cooked)
678 struct sk_buff *skb2;
679 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
680 struct ieee80211_sub_if_data *sdata;
681 struct net_device *prev_dev = NULL;
684 /* send frame to monitor interfaces now */
685 rtap_len = ieee80211_tx_radiotap_len(info);
686 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
687 pr_err("ieee80211_tx_status: headroom too small\n");
691 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
694 /* XXX: is this sufficient for BPF? */
695 skb_set_mac_header(skb, 0);
696 skb->ip_summed = CHECKSUM_UNNECESSARY;
697 skb->pkt_type = PACKET_OTHERHOST;
698 skb->protocol = htons(ETH_P_802_2);
699 memset(skb->cb, 0, sizeof(skb->cb));
702 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
703 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
704 if (!ieee80211_sdata_running(sdata))
707 if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
712 skb2 = skb_clone(skb, GFP_ATOMIC);
714 skb2->dev = prev_dev;
719 prev_dev = sdata->dev;
731 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
733 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
734 struct ieee80211_local *local = hw_to_local(hw);
735 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
737 struct ieee80211_supported_band *sband;
738 struct sta_info *sta;
739 struct rhash_head *tmp;
744 struct ieee80211_bar *bar;
746 int tid = IEEE80211_NUM_TIDS;
747 const struct bucket_table *tbl;
749 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
753 sband = local->hw.wiphy->bands[info->band];
754 fc = hdr->frame_control;
756 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
758 for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) {
759 /* skip wrong virtual interface */
760 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
763 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
765 if (info->flags & IEEE80211_TX_STATUS_EOSP)
766 clear_sta_flag(sta, WLAN_STA_SP);
768 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
769 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
771 * The STA is in power save mode, so assume
772 * that this TX packet failed because of that.
774 ieee80211_handle_filtered_frame(local, sta, skb);
779 /* mesh Peer Service Period support */
780 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
781 ieee80211_is_data_qos(fc))
782 ieee80211_mpsp_trigger_process(
783 ieee80211_get_qos_ctl(hdr),
786 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
787 (ieee80211_is_data(hdr->frame_control)) &&
789 sta->tx_stats.last_rate =
790 info->status.rates[rates_idx];
792 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
793 (ieee80211_is_data_qos(fc))) {
797 qc = ieee80211_get_qos_ctl(hdr);
799 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
800 & IEEE80211_SCTL_SEQ);
801 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
803 } else if (ieee80211_is_data_qos(fc)) {
804 u8 *qc = ieee80211_get_qos_ctl(hdr);
809 if (!acked && ieee80211_is_back_req(fc)) {
813 * BAR failed, store the last SSN and retry sending
814 * the BAR when the next unicast transmission on the
817 bar = (struct ieee80211_bar *) skb->data;
818 control = le16_to_cpu(bar->control);
819 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
820 u16 ssn = le16_to_cpu(bar->start_seq_num);
823 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
824 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
826 ieee80211_set_bar_pending(sta, tid, ssn);
830 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
831 ieee80211_handle_filtered_frame(local, sta, skb);
836 sta->status_stats.retry_failed++;
837 sta->status_stats.retry_count += retry_count;
839 if (ieee80211_is_data_present(fc)) {
841 sta->status_stats.msdu_failed[tid]++;
843 sta->status_stats.msdu_retries[tid] +=
848 rate_control_tx_status(local, sband, sta, skb);
849 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
850 ieee80211s_update_metric(local, sta, skb);
852 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
853 ieee80211_frame_acked(sta, skb);
855 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
856 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
857 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
858 acked, info->status.tx_time);
860 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
861 if (info->flags & IEEE80211_TX_STAT_ACK) {
862 if (sta->status_stats.lost_packets)
863 sta->status_stats.lost_packets = 0;
865 /* Track when last TDLS packet was ACKed */
866 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
867 sta->status_stats.last_tdls_pkt_time =
870 ieee80211_lost_packet(sta, info);
877 ieee80211_led_tx(local);
880 * Fragments are passed to low-level drivers as separate skbs, so these
881 * are actually fragments, not frames. Update frame counters only for
882 * the first fragment of the frame. */
883 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
884 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
885 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
886 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
887 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
888 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
890 I802_DEBUG_INC(local->dot11RetryCount);
892 I802_DEBUG_INC(local->dot11MultipleRetryCount);
895 /* This counter shall be incremented for an acknowledged MPDU
896 * with an individual address in the address 1 field or an MPDU
897 * with a multicast address in the address 1 field of type Data
899 if (!is_multicast_ether_addr(hdr->addr1) ||
900 ieee80211_is_data(fc) ||
901 ieee80211_is_mgmt(fc))
902 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
904 if (ieee80211_is_first_frag(hdr->seq_ctrl))
905 I802_DEBUG_INC(local->dot11FailedCount);
908 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
909 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
910 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
911 local->ps_sdata && !(local->scanning)) {
912 if (info->flags & IEEE80211_TX_STAT_ACK) {
913 local->ps_sdata->u.mgd.flags |=
914 IEEE80211_STA_NULLFUNC_ACKED;
916 mod_timer(&local->dynamic_ps_timer, jiffies +
917 msecs_to_jiffies(10));
920 ieee80211_report_used_skb(local, skb, false);
922 /* this was a transmitted frame, but now we want to reuse it */
925 /* Need to make a copy before skb->cb gets cleared */
926 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
927 !(ieee80211_is_data(fc));
930 * This is a bit racy but we can avoid a lot of work
933 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
938 /* send to monitor interfaces */
939 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked);
941 EXPORT_SYMBOL(ieee80211_tx_status);
943 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
945 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
946 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
947 num_packets, GFP_ATOMIC);
949 EXPORT_SYMBOL(ieee80211_report_low_ack);
951 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
953 struct ieee80211_local *local = hw_to_local(hw);
955 ieee80211_report_used_skb(local, skb, true);
956 dev_kfree_skb_any(skb);
958 EXPORT_SYMBOL(ieee80211_free_txskb);
960 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
961 struct sk_buff_head *skbs)
965 while ((skb = __skb_dequeue(skbs)))
966 ieee80211_free_txskb(hw, skb);