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fe7a5d5c JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
026331c4 | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
fe7a5d5c JB |
7 | * |
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 | ||
bc3b2d7f | 13 | #include <linux/export.h> |
888d04df | 14 | #include <linux/etherdevice.h> |
fe7a5d5c | 15 | #include <net/mac80211.h> |
d26ad377 | 16 | #include <asm/unaligned.h> |
fe7a5d5c JB |
17 | #include "ieee80211_i.h" |
18 | #include "rate.h" | |
19 | #include "mesh.h" | |
20 | #include "led.h" | |
948d887d | 21 | #include "wme.h" |
fe7a5d5c JB |
22 | |
23 | ||
24 | void 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))) { | |
c3e7724b | 38 | ieee80211_free_txskb(hw, skb); |
fe7a5d5c JB |
39 | tmp--; |
40 | I802_DEBUG_INC(local->tx_status_drop); | |
41 | } | |
42 | tasklet_schedule(&local->tasklet); | |
43 | } | |
44 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
45 | ||
46 | static 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); | |
948d887d JB |
51 | struct ieee80211_hdr *hdr = (void *)skb->data; |
52 | int ac; | |
fe7a5d5c | 53 | |
890030d3 FF |
54 | if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | |
55 | IEEE80211_TX_CTL_AMPDU)) { | |
da629cf1 HS |
56 | ieee80211_free_txskb(&local->hw, skb); |
57 | return; | |
58 | } | |
59 | ||
697e6a0f JB |
60 | /* |
61 | * This skb 'survived' a round-trip through the driver, and | |
62 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 63 | * we can definitely not rely on the control information |
c6fcf6bc JB |
64 | * being correct. Clear it so we don't get junk there, and |
65 | * indicate that it needs new processing, but must not be | |
66 | * modified/encrypted again. | |
697e6a0f JB |
67 | */ |
68 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
69 | |
70 | info->control.jiffies = jiffies; | |
71 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
72 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
73 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 74 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 75 | |
e5a9f8d0 | 76 | sta->status_stats.filtered++; |
fe7a5d5c | 77 | |
8a8656fa JB |
78 | /* |
79 | * Clear more-data bit on filtered frames, it might be set | |
80 | * but later frames might time out so it might have to be | |
81 | * clear again ... It's all rather unlikely (this frame | |
82 | * should time out first, right?) but let's not confuse | |
83 | * peers unnecessarily. | |
84 | */ | |
85 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
86 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
87 | ||
948d887d | 88 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
89 | u8 *p = ieee80211_get_qos_ctl(hdr); |
90 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
91 | ||
92 | /* | |
93 | * Clear EOSP if set, this could happen e.g. | |
94 | * if an absence period (us being a P2P GO) | |
95 | * shortens the SP. | |
96 | */ | |
97 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
98 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
731977e9 | 99 | ac = ieee80211_ac_from_tid(tid); |
948d887d JB |
100 | } else { |
101 | ac = IEEE80211_AC_BE; | |
102 | } | |
103 | ||
fe7a5d5c JB |
104 | /* |
105 | * Clear the TX filter mask for this STA when sending the next | |
106 | * packet. If the STA went to power save mode, this will happen | |
107 | * when it wakes up for the next time. | |
108 | */ | |
c2c98fde | 109 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
f7418bc1 | 110 | ieee80211_clear_fast_xmit(sta); |
fe7a5d5c JB |
111 | |
112 | /* | |
113 | * This code races in the following way: | |
114 | * | |
115 | * (1) STA sends frame indicating it will go to sleep and does so | |
116 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
117 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
118 | * (4) we get TX status before having processed the frame and | |
119 | * knowing that the STA has gone to sleep. | |
120 | * | |
121 | * This is actually quite unlikely even when both those events are | |
122 | * processed from interrupts coming in quickly after one another or | |
123 | * even at the same time because we queue both TX status events and | |
124 | * RX frames to be processed by a tasklet and process them in the | |
125 | * same order that they were received or TX status last. Hence, there | |
126 | * is no race as long as the frame RX is processed before the next TX | |
127 | * status, which drivers can ensure, see below. | |
128 | * | |
129 | * Note that this can only happen if the hardware or firmware can | |
130 | * actually add STAs to the filter list, if this is done by the | |
131 | * driver in response to set_tim() (which will only reduce the race | |
132 | * this whole filtering tries to solve, not completely solve it) | |
133 | * this situation cannot happen. | |
134 | * | |
135 | * To completely solve this race drivers need to make sure that they | |
136 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
137 | * functions and | |
138 | * (b) always process RX events before TX status events if ordering | |
139 | * can be unknown, for example with different interrupt status | |
140 | * bits. | |
d057e5a3 AN |
141 | * (c) if PS mode transitions are manual (i.e. the flag |
142 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
143 | * changes before calling TX status events if ordering can be | |
144 | * unknown. | |
fe7a5d5c | 145 | */ |
c2c98fde | 146 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
948d887d JB |
147 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
148 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 149 | sta_info_recalc_tim(sta); |
60750397 JB |
150 | |
151 | if (!timer_pending(&local->sta_cleanup)) | |
152 | mod_timer(&local->sta_cleanup, | |
153 | round_jiffies(jiffies + | |
154 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
155 | return; |
156 | } | |
157 | ||
c2c98fde | 158 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
fe7a5d5c JB |
159 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
160 | /* Software retry the packet once */ | |
161 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
162 | ieee80211_add_pending_skb(local, skb); | |
163 | return; | |
164 | } | |
165 | ||
bdcbd8e0 JB |
166 | ps_dbg_ratelimited(sta->sdata, |
167 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
168 | skb_queue_len(&sta->tx_filtered[ac]), | |
169 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); | |
c3e7724b | 170 | ieee80211_free_txskb(&local->hw, skb); |
fe7a5d5c JB |
171 | } |
172 | ||
f0425bed FF |
173 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
174 | { | |
175 | struct tid_ampdu_tx *tid_tx; | |
176 | ||
177 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
178 | if (!tid_tx || !tid_tx->bar_pending) | |
179 | return; | |
180 | ||
181 | tid_tx->bar_pending = false; | |
8c771244 | 182 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
183 | } |
184 | ||
0f78231b JB |
185 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
186 | { | |
187 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
188 | struct ieee80211_local *local = sta->local; | |
189 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
190 | ||
30686bf7 | 191 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
b8da6b6a | 192 | sta->status_stats.last_ack = jiffies; |
0c5b9329 | 193 | |
f0425bed FF |
194 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
195 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
196 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
197 | u16 tid = qc[0] & 0xf; | |
198 | ||
199 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
200 | } | |
201 | ||
0f78231b | 202 | if (ieee80211_is_action(mgmt->frame_control) && |
cf147085 | 203 | !ieee80211_has_protected(mgmt->frame_control) && |
0f78231b | 204 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 | 205 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
04ecd257 | 206 | ieee80211_sdata_running(sdata)) { |
687da132 EG |
207 | enum ieee80211_smps_mode smps_mode; |
208 | ||
0f78231b JB |
209 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
210 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
687da132 | 211 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
212 | break; |
213 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
687da132 | 214 | smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
215 | break; |
216 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
217 | default: /* shouldn't happen since we don't send that */ | |
687da132 | 218 | smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
219 | break; |
220 | } | |
221 | ||
687da132 EG |
222 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
223 | /* | |
224 | * This update looks racy, but isn't -- if we come | |
225 | * here we've definitely got a station that we're | |
226 | * talking to, and on a managed interface that can | |
227 | * only be the AP. And the only other place updating | |
228 | * this variable in managed mode is before association. | |
229 | */ | |
230 | sdata->smps_mode = smps_mode; | |
231 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); | |
232 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || | |
233 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
234 | sta->known_smps_mode = smps_mode; | |
235 | } | |
0f78231b JB |
236 | } |
237 | } | |
238 | ||
f0425bed FF |
239 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
240 | { | |
241 | struct tid_ampdu_tx *tid_tx; | |
242 | ||
243 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
244 | if (!tid_tx) | |
245 | return; | |
246 | ||
247 | tid_tx->failed_bar_ssn = ssn; | |
248 | tid_tx->bar_pending = true; | |
249 | } | |
250 | ||
a2fe8166 HS |
251 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
252 | { | |
253 | int len = sizeof(struct ieee80211_radiotap_header); | |
254 | ||
255 | /* IEEE80211_RADIOTAP_RATE rate */ | |
256 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
257 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
258 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
259 | len += 2; |
260 | ||
261 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
262 | len += 2; | |
263 | ||
264 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
265 | len += 1; | |
266 | ||
a8241310 KB |
267 | /* IEEE80211_RADIOTAP_MCS |
268 | * IEEE80211_RADIOTAP_VHT */ | |
269 | if (info->status.rates[0].idx >= 0) { | |
270 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
271 | len += 3; | |
272 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
273 | len = ALIGN(len, 2) + 12; | |
274 | } | |
7f2a5e21 | 275 | |
a2fe8166 HS |
276 | return len; |
277 | } | |
278 | ||
2103dec1 | 279 | static void |
a8241310 KB |
280 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
281 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
282 | struct sk_buff *skb, int retry_count, |
283 | int rtap_len, int shift) | |
a2fe8166 HS |
284 | { |
285 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
286 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
287 | struct ieee80211_radiotap_header *rthdr; | |
288 | unsigned char *pos; | |
9c8f2c42 | 289 | u16 txflags; |
a2fe8166 HS |
290 | |
291 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); | |
292 | ||
293 | memset(rthdr, 0, rtap_len); | |
294 | rthdr->it_len = cpu_to_le16(rtap_len); | |
295 | rthdr->it_present = | |
296 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
297 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
298 | pos = (unsigned char *)(rthdr + 1); | |
299 | ||
300 | /* | |
301 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
302 | * extensions proposal contains, we can actually report | |
303 | * the whole set of tries we did. | |
304 | */ | |
305 | ||
306 | /* IEEE80211_RADIOTAP_RATE */ | |
307 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
308 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
309 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
310 | u16 rate; |
311 | ||
a2fe8166 | 312 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
313 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
314 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
315 | /* padding for tx flags */ |
316 | pos += 2; | |
317 | } | |
318 | ||
319 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
320 | txflags = 0; | |
321 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
322 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 323 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 | 324 | |
311ab8e1 | 325 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
9c8f2c42 | 326 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
311ab8e1 | 327 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 328 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
329 | |
330 | put_unaligned_le16(txflags, pos); | |
331 | pos += 2; | |
332 | ||
333 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
334 | /* for now report the total retry_count */ | |
335 | *pos = retry_count; | |
336 | pos++; | |
7f2a5e21 | 337 | |
a8241310 KB |
338 | if (info->status.rates[0].idx < 0) |
339 | return; | |
340 | ||
341 | /* IEEE80211_RADIOTAP_MCS | |
342 | * IEEE80211_RADIOTAP_VHT */ | |
343 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
344 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
345 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
346 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
347 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
348 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
349 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
350 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
351 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
352 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
353 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
354 | pos[2] = info->status.rates[0].idx; | |
355 | pos += 3; | |
a8241310 KB |
356 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
357 | u16 known = local->hw.radiotap_vht_details & | |
358 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
359 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
360 | ||
361 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
362 | ||
363 | /* required alignment from rthdr */ | |
364 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 365 | |
a8241310 KB |
366 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
367 | put_unaligned_le16(known, pos); | |
368 | pos += 2; | |
369 | ||
370 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
371 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
372 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
373 | pos++; | |
374 | ||
375 | /* u8 bandwidth */ | |
376 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
377 | *pos = 1; | |
378 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
379 | *pos = 4; | |
380 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
381 | *pos = 11; | |
382 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
383 | *pos = 0; | |
384 | pos++; | |
385 | ||
386 | /* u8 mcs_nss[4] */ | |
387 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
388 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
389 | pos += 4; | |
390 | ||
391 | /* u8 coding */ | |
392 | pos++; | |
393 | /* u8 group_id */ | |
394 | pos++; | |
395 | /* u16 partial_aid */ | |
396 | pos += 2; | |
397 | } | |
a2fe8166 HS |
398 | } |
399 | ||
1277b4a9 LK |
400 | /* |
401 | * Handles the tx for TDLS teardown frames. | |
402 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP | |
403 | */ | |
404 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, | |
405 | struct ieee80211_sub_if_data *sdata, | |
406 | struct sk_buff *skb, u32 flags) | |
407 | { | |
408 | struct sk_buff *teardown_skb; | |
409 | struct sk_buff *orig_teardown_skb; | |
410 | bool is_teardown = false; | |
411 | ||
412 | /* Get the teardown data we need and free the lock */ | |
413 | spin_lock(&sdata->u.mgd.teardown_lock); | |
414 | teardown_skb = sdata->u.mgd.teardown_skb; | |
415 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; | |
416 | if ((skb == orig_teardown_skb) && teardown_skb) { | |
417 | sdata->u.mgd.teardown_skb = NULL; | |
418 | sdata->u.mgd.orig_teardown_skb = NULL; | |
419 | is_teardown = true; | |
420 | } | |
421 | spin_unlock(&sdata->u.mgd.teardown_lock); | |
422 | ||
423 | if (is_teardown) { | |
424 | /* This mechanism relies on being able to get ACKs */ | |
30686bf7 | 425 | WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); |
1277b4a9 LK |
426 | |
427 | /* Check if peer has ACKed */ | |
428 | if (flags & IEEE80211_TX_STAT_ACK) { | |
429 | dev_kfree_skb_any(teardown_skb); | |
430 | } else { | |
431 | tdls_dbg(sdata, | |
432 | "TDLS Resending teardown through AP\n"); | |
433 | ||
434 | ieee80211_subif_start_xmit(teardown_skb, skb->dev); | |
435 | } | |
436 | } | |
437 | } | |
438 | ||
b2eb0ee6 JB |
439 | static struct ieee80211_sub_if_data * |
440 | ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) | |
441 | { | |
442 | struct ieee80211_sub_if_data *sdata; | |
443 | ||
444 | if (skb->dev) { | |
445 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
446 | if (!sdata->dev) | |
447 | continue; | |
448 | ||
449 | if (skb->dev == sdata->dev) | |
450 | return sdata; | |
451 | } | |
452 | ||
453 | return NULL; | |
454 | } | |
455 | ||
456 | return rcu_dereference(local->p2p_sdata); | |
457 | } | |
458 | ||
459 | static void ieee80211_report_ack_skb(struct ieee80211_local *local, | |
460 | struct ieee80211_tx_info *info, | |
461 | bool acked, bool dropped) | |
462 | { | |
463 | struct sk_buff *skb; | |
464 | unsigned long flags; | |
465 | ||
466 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
d3e709e6 | 467 | skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); |
b2eb0ee6 JB |
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) { | |
3b79af97 | 479 | u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; |
b2eb0ee6 | 480 | struct ieee80211_sub_if_data *sdata; |
3b79af97 | 481 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2eb0ee6 JB |
482 | |
483 | rcu_read_lock(); | |
484 | sdata = ieee80211_sdata_from_skb(local, skb); | |
3b79af97 JB |
485 | 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 | } | |
b2eb0ee6 JB |
496 | 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 | ||
8a2fbedc JB |
505 | static 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 | ||
3b79af97 | 515 | if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
b2eb0ee6 | 516 | struct ieee80211_sub_if_data *sdata; |
8a2fbedc JB |
517 | |
518 | rcu_read_lock(); | |
519 | ||
b2eb0ee6 | 520 | sdata = ieee80211_sdata_from_skb(local, skb); |
8a2fbedc | 521 | |
1672c0e3 | 522 | if (!sdata) { |
8a2fbedc | 523 | skb->dev = NULL; |
75dbf00b | 524 | } else { |
1277b4a9 LK |
525 | 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); | |
8a2fbedc JB |
538 | } |
539 | ||
540 | rcu_read_unlock(); | |
b2eb0ee6 JB |
541 | } else if (info->ack_frame_id) { |
542 | ieee80211_report_ack_skb(local, info, acked, dropped); | |
8a2fbedc | 543 | } |
2cc6f5a7 JB |
544 | |
545 | if (!dropped && skb->destructor) { | |
546 | skb->wifi_acked_valid = 1; | |
547 | skb->wifi_acked = acked; | |
548 | } | |
8a2fbedc JB |
549 | } |
550 | ||
99ba2a14 JB |
551 | /* |
552 | * Use a static threshold for now, best value to be determined | |
553 | * by testing ... | |
554 | * Should it depend on: | |
555 | * - on # of retransmissions | |
556 | * - current throughput (higher value for higher tpt)? | |
557 | */ | |
558 | #define STA_LOST_PKT_THRESHOLD 50 | |
9d58f25b LK |
559 | #define STA_LOST_TDLS_PKT_THRESHOLD 10 |
560 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ | |
99ba2a14 | 561 | |
ad9dda63 FF |
562 | static void ieee80211_lost_packet(struct sta_info *sta, |
563 | struct ieee80211_tx_info *info) | |
abd43a6a | 564 | { |
e8a24cd4 RM |
565 | /* If driver relies on its own algorithm for station kickout, skip |
566 | * mac80211 packet loss mechanism. | |
567 | */ | |
568 | if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) | |
569 | return; | |
570 | ||
abd43a6a FF |
571 | /* This packet was aggregated but doesn't carry status info */ |
572 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
573 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
574 | return; | |
575 | ||
e5a9f8d0 JB |
576 | sta->status_stats.lost_packets++; |
577 | if (!sta->sta.tdls && | |
578 | sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) | |
9d58f25b LK |
579 | return; |
580 | ||
581 | /* | |
582 | * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD | |
583 | * of the last packets were lost, and that no ACK was received in the | |
584 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss | |
585 | * mechanism. | |
586 | */ | |
587 | if (sta->sta.tdls && | |
e5a9f8d0 | 588 | (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || |
9d58f25b | 589 | time_before(jiffies, |
e5a9f8d0 JB |
590 | sta->status_stats.last_tdls_pkt_time + |
591 | STA_LOST_TDLS_PKT_TIME))) | |
abd43a6a FF |
592 | return; |
593 | ||
594 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
e5a9f8d0 JB |
595 | sta->status_stats.lost_packets, GFP_ATOMIC); |
596 | sta->status_stats.lost_packets = 0; | |
abd43a6a FF |
597 | } |
598 | ||
7e1cdcbb FF |
599 | static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, |
600 | struct ieee80211_tx_info *info, | |
601 | int *retry_count) | |
fe7a5d5c | 602 | { |
0c869808 | 603 | int rates_idx = -1; |
7e1cdcbb FF |
604 | int count = -1; |
605 | int i; | |
fe7a5d5c JB |
606 | |
607 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
608 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
609 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
610 | /* just the first aggr frame carry status info */ | |
611 | info->status.rates[i].idx = -1; | |
612 | info->status.rates[i].count = 0; | |
613 | break; | |
614 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
615 | break; |
616 | } else if (i >= hw->max_report_rates) { | |
617 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
618 | info->status.rates[i].idx = -1; |
619 | info->status.rates[i].count = 0; | |
be7974aa | 620 | break; |
fe7a5d5c JB |
621 | } |
622 | ||
7e1cdcbb | 623 | count += info->status.rates[i].count; |
fe7a5d5c | 624 | } |
be7974aa HS |
625 | rates_idx = i - 1; |
626 | ||
7e1cdcbb FF |
627 | if (count < 0) |
628 | count = 0; | |
629 | ||
630 | *retry_count = count; | |
631 | return rates_idx; | |
632 | } | |
633 | ||
4dc792b8 HS |
634 | void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, |
635 | struct ieee80211_supported_band *sband, | |
636 | int retry_count, int shift, bool send_to_cooked) | |
7e1cdcbb FF |
637 | { |
638 | struct sk_buff *skb2; | |
4dc792b8 HS |
639 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
640 | struct ieee80211_sub_if_data *sdata; | |
641 | struct net_device *prev_dev = NULL; | |
642 | int rtap_len; | |
643 | ||
644 | /* send frame to monitor interfaces now */ | |
645 | rtap_len = ieee80211_tx_radiotap_len(info); | |
646 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
647 | pr_err("ieee80211_tx_status: headroom too small\n"); | |
648 | dev_kfree_skb(skb); | |
649 | return; | |
650 | } | |
651 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, | |
652 | rtap_len, shift); | |
653 | ||
654 | /* XXX: is this sufficient for BPF? */ | |
d57a544d | 655 | skb_reset_mac_header(skb); |
4dc792b8 HS |
656 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
657 | skb->pkt_type = PACKET_OTHERHOST; | |
658 | skb->protocol = htons(ETH_P_802_2); | |
659 | memset(skb->cb, 0, sizeof(skb->cb)); | |
660 | ||
661 | rcu_read_lock(); | |
662 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
663 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
664 | if (!ieee80211_sdata_running(sdata)) | |
665 | continue; | |
666 | ||
d8212184 | 667 | if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && |
4dc792b8 HS |
668 | !send_to_cooked) |
669 | continue; | |
670 | ||
671 | if (prev_dev) { | |
672 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
673 | if (skb2) { | |
674 | skb2->dev = prev_dev; | |
675 | netif_rx(skb2); | |
676 | } | |
677 | } | |
678 | ||
679 | prev_dev = sdata->dev; | |
680 | } | |
681 | } | |
682 | if (prev_dev) { | |
683 | skb->dev = prev_dev; | |
684 | netif_rx(skb); | |
685 | skb = NULL; | |
686 | } | |
687 | rcu_read_unlock(); | |
688 | dev_kfree_skb(skb); | |
689 | } | |
690 | ||
691 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) | |
692 | { | |
7e1cdcbb FF |
693 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
694 | struct ieee80211_local *local = hw_to_local(hw); | |
695 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
18fb84d9 | 696 | struct ieee80211_tx_status status = {}; |
7e1cdcbb FF |
697 | __le16 fc; |
698 | struct ieee80211_supported_band *sband; | |
83e7e4ce | 699 | struct rhlist_head *tmp; |
7bedd0cf | 700 | struct sta_info *sta; |
7e1cdcbb FF |
701 | int retry_count; |
702 | int rates_idx; | |
703 | bool send_to_cooked; | |
704 | bool acked; | |
705 | struct ieee80211_bar *bar; | |
7e1cdcbb | 706 | int shift = 0; |
5e06a9e8 | 707 | int tid = IEEE80211_NUM_TIDS; |
7e1cdcbb FF |
708 | |
709 | rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); | |
fe7a5d5c JB |
710 | |
711 | rcu_read_lock(); | |
712 | ||
713 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 714 | fc = hdr->frame_control; |
fe7a5d5c | 715 | |
83e7e4ce | 716 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
abe60632 | 717 | /* skip wrong virtual interface */ |
b203ca39 | 718 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
abe60632 | 719 | continue; |
fe7a5d5c | 720 | |
2103dec1 SW |
721 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
722 | ||
47086fc5 | 723 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 724 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 725 | |
04ac3c0e | 726 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
71f2c347 MH |
727 | |
728 | /* mesh Peer Service Period support */ | |
729 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
730 | ieee80211_is_data_qos(fc)) | |
731 | ieee80211_mpsp_trigger_process( | |
732 | ieee80211_get_qos_ctl(hdr), sta, true, acked); | |
733 | ||
c2c98fde | 734 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
735 | /* |
736 | * The STA is in power save mode, so assume | |
737 | * that this TX packet failed because of that. | |
738 | */ | |
739 | ieee80211_handle_filtered_frame(local, sta, skb); | |
740 | rcu_read_unlock(); | |
741 | return; | |
742 | } | |
743 | ||
30686bf7 | 744 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && |
00a9a6d1 | 745 | (ieee80211_is_data(hdr->frame_control)) && |
0c869808 | 746 | (rates_idx != -1)) |
e5a9f8d0 JB |
747 | sta->tx_stats.last_rate = |
748 | info->status.rates[rates_idx]; | |
0c869808 | 749 | |
fe7a5d5c JB |
750 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
751 | (ieee80211_is_data_qos(fc))) { | |
79c892b8 | 752 | u16 ssn; |
fe7a5d5c JB |
753 | u8 *qc; |
754 | ||
755 | qc = ieee80211_get_qos_ctl(hdr); | |
756 | tid = qc[0] & 0xf; | |
757 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
758 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 759 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c | 760 | tid, ssn); |
79c892b8 JB |
761 | } else if (ieee80211_is_data_qos(fc)) { |
762 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
763 | ||
764 | tid = qc[0] & 0xf; | |
fe7a5d5c JB |
765 | } |
766 | ||
e69deded | 767 | if (!acked && ieee80211_is_back_req(fc)) { |
79c892b8 | 768 | u16 control; |
7107676a | 769 | |
e69deded | 770 | /* |
7107676a FF |
771 | * BAR failed, store the last SSN and retry sending |
772 | * the BAR when the next unicast transmission on the | |
773 | * same TID succeeds. | |
e69deded HS |
774 | */ |
775 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
776 | control = le16_to_cpu(bar->control); |
777 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
778 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
779 | ||
7107676a | 780 | tid = (control & |
e69deded HS |
781 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
782 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 783 | |
8df6b7b1 | 784 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
785 | } |
786 | } | |
787 | ||
fe7a5d5c JB |
788 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
789 | ieee80211_handle_filtered_frame(local, sta, skb); | |
790 | rcu_read_unlock(); | |
791 | return; | |
792 | } else { | |
04ac3c0e | 793 | if (!acked) |
e5a9f8d0 JB |
794 | sta->status_stats.retry_failed++; |
795 | sta->status_stats.retry_count += retry_count; | |
79c892b8 JB |
796 | |
797 | if (ieee80211_is_data_present(fc)) { | |
798 | if (!acked) | |
e5a9f8d0 JB |
799 | sta->status_stats.msdu_failed[tid]++; |
800 | ||
801 | sta->status_stats.msdu_retries[tid] += | |
802 | retry_count; | |
79c892b8 | 803 | } |
fe7a5d5c JB |
804 | } |
805 | ||
18fb84d9 FF |
806 | status.sta = &sta->sta; |
807 | status.skb = skb; | |
808 | status.info = info; | |
809 | rate_control_tx_status(local, sband, &status); | |
fe7a5d5c JB |
810 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
811 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 812 | |
04ac3c0e | 813 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 814 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 815 | |
04ac3c0e | 816 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
30686bf7 | 817 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
02219b3a JB |
818 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, |
819 | acked, info->status.tx_time); | |
04ac3c0e | 820 | |
30686bf7 | 821 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
99ba2a14 | 822 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
e5a9f8d0 JB |
823 | if (sta->status_stats.lost_packets) |
824 | sta->status_stats.lost_packets = 0; | |
9d58f25b LK |
825 | |
826 | /* Track when last TDLS packet was ACKed */ | |
827 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
e5a9f8d0 JB |
828 | sta->status_stats.last_tdls_pkt_time = |
829 | jiffies; | |
abd43a6a | 830 | } else { |
ad9dda63 | 831 | ieee80211_lost_packet(sta, info); |
99ba2a14 JB |
832 | } |
833 | } | |
fe7a5d5c JB |
834 | } |
835 | ||
836 | rcu_read_unlock(); | |
837 | ||
e47f2509 | 838 | ieee80211_led_tx(local); |
fe7a5d5c JB |
839 | |
840 | /* SNMP counters | |
841 | * Fragments are passed to low-level drivers as separate skbs, so these | |
842 | * are actually fragments, not frames. Update frame counters only for | |
843 | * the first fragment of the frame. */ | |
5cf16616 SM |
844 | if ((info->flags & IEEE80211_TX_STAT_ACK) || |
845 | (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { | |
adf5ace5 | 846 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
c206ca67 | 847 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
85b89af0 | 848 | if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
c206ca67 | 849 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
fe7a5d5c | 850 | if (retry_count > 0) |
c206ca67 | 851 | I802_DEBUG_INC(local->dot11RetryCount); |
fe7a5d5c | 852 | if (retry_count > 1) |
c206ca67 | 853 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
fe7a5d5c JB |
854 | } |
855 | ||
856 | /* This counter shall be incremented for an acknowledged MPDU | |
857 | * with an individual address in the address 1 field or an MPDU | |
858 | * with a multicast address in the address 1 field of type Data | |
859 | * or Management. */ | |
860 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
861 | ieee80211_is_data(fc) || |
862 | ieee80211_is_mgmt(fc)) | |
c206ca67 | 863 | I802_DEBUG_INC(local->dot11TransmittedFragmentCount); |
fe7a5d5c | 864 | } else { |
adf5ace5 | 865 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
c206ca67 | 866 | I802_DEBUG_INC(local->dot11FailedCount); |
fe7a5d5c JB |
867 | } |
868 | ||
375177bf | 869 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
30686bf7 | 870 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
375177bf VN |
871 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
872 | local->ps_sdata && !(local->scanning)) { | |
873 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
874 | local->ps_sdata->u.mgd.flags |= | |
875 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
876 | } else |
877 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
878 | msecs_to_jiffies(10)); | |
879 | } | |
880 | ||
8a2fbedc | 881 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 882 | |
fe7a5d5c JB |
883 | /* this was a transmitted frame, but now we want to reuse it */ |
884 | skb_orphan(skb); | |
885 | ||
eaf55530 FF |
886 | /* Need to make a copy before skb->cb gets cleared */ |
887 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 888 | !(ieee80211_is_data(fc)); |
eaf55530 | 889 | |
fe7a5d5c JB |
890 | /* |
891 | * This is a bit racy but we can avoid a lot of work | |
892 | * with this test... | |
893 | */ | |
eaf55530 | 894 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
895 | dev_kfree_skb(skb); |
896 | return; | |
897 | } | |
898 | ||
4dc792b8 HS |
899 | /* send to monitor interfaces */ |
900 | ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked); | |
fe7a5d5c JB |
901 | } |
902 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b | 903 | |
eefebd31 FF |
904 | void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, |
905 | struct ieee80211_sta *pubsta, | |
906 | struct ieee80211_tx_info *info) | |
907 | { | |
908 | struct ieee80211_local *local = hw_to_local(hw); | |
909 | struct ieee80211_supported_band *sband; | |
910 | struct ieee80211_tx_status status = {}; | |
911 | int retry_count; | |
912 | bool acked, noack_success; | |
913 | ||
914 | ieee80211_tx_get_rates(hw, info, &retry_count); | |
915 | ||
916 | sband = hw->wiphy->bands[info->band]; | |
917 | ||
918 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
919 | noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); | |
920 | ||
921 | if (pubsta) { | |
922 | struct sta_info *sta; | |
923 | ||
924 | sta = container_of(pubsta, struct sta_info, sta); | |
925 | ||
926 | if (!acked) | |
927 | sta->status_stats.retry_failed++; | |
928 | sta->status_stats.retry_count += retry_count; | |
929 | ||
930 | if (acked) { | |
931 | sta->status_stats.last_ack = jiffies; | |
932 | ||
933 | if (sta->status_stats.lost_packets) | |
934 | sta->status_stats.lost_packets = 0; | |
935 | ||
936 | /* Track when last TDLS packet was ACKed */ | |
937 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
938 | sta->status_stats.last_tdls_pkt_time = jiffies; | |
939 | } else { | |
940 | ieee80211_lost_packet(sta, info); | |
941 | } | |
942 | ||
943 | status.sta = pubsta; | |
944 | status.info = info; | |
945 | rate_control_tx_status(local, sband, &status); | |
946 | } | |
947 | ||
948 | if (acked || noack_success) { | |
949 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); | |
950 | if (!pubsta) | |
951 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); | |
952 | if (retry_count > 0) | |
953 | I802_DEBUG_INC(local->dot11RetryCount); | |
954 | if (retry_count > 1) | |
955 | I802_DEBUG_INC(local->dot11MultipleRetryCount); | |
956 | } else { | |
957 | I802_DEBUG_INC(local->dot11FailedCount); | |
958 | } | |
959 | } | |
960 | EXPORT_SYMBOL(ieee80211_tx_status_noskb); | |
961 | ||
8178d38b AN |
962 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
963 | { | |
964 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
965 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
966 | num_packets, GFP_ATOMIC); | |
967 | } | |
968 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
969 | |
970 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
971 | { | |
a729cff8 | 972 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 973 | |
8a2fbedc | 974 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
975 | dev_kfree_skb_any(skb); |
976 | } | |
977 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
978 | |
979 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
980 | struct sk_buff_head *skbs) | |
981 | { | |
982 | struct sk_buff *skb; | |
983 | ||
984 | while ((skb = __skb_dequeue(skbs))) | |
985 | ieee80211_free_txskb(hw, skb); | |
986 | } |