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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; | |
a78b26ff | 190 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
0f78231b | 191 | |
a78b26ff | 192 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
b8da6b6a | 193 | sta->status_stats.last_ack = jiffies; |
a78b26ff VN |
194 | if (txinfo->status.is_valid_ack_signal) { |
195 | sta->status_stats.last_ack_signal = | |
196 | (s8)txinfo->status.ack_signal; | |
197 | sta->status_stats.ack_signal_filled = true; | |
cc60dbbf BP |
198 | ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, |
199 | -txinfo->status.ack_signal); | |
a78b26ff VN |
200 | } |
201 | } | |
0c5b9329 | 202 | |
f0425bed FF |
203 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
204 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
205 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
206 | u16 tid = qc[0] & 0xf; | |
207 | ||
208 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
209 | } | |
210 | ||
0f78231b | 211 | if (ieee80211_is_action(mgmt->frame_control) && |
cf147085 | 212 | !ieee80211_has_protected(mgmt->frame_control) && |
0f78231b | 213 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 | 214 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
04ecd257 | 215 | ieee80211_sdata_running(sdata)) { |
687da132 EG |
216 | enum ieee80211_smps_mode smps_mode; |
217 | ||
0f78231b JB |
218 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
219 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
687da132 | 220 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
221 | break; |
222 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
687da132 | 223 | smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
224 | break; |
225 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
226 | default: /* shouldn't happen since we don't send that */ | |
687da132 | 227 | smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
228 | break; |
229 | } | |
230 | ||
687da132 EG |
231 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
232 | /* | |
233 | * This update looks racy, but isn't -- if we come | |
234 | * here we've definitely got a station that we're | |
235 | * talking to, and on a managed interface that can | |
236 | * only be the AP. And the only other place updating | |
237 | * this variable in managed mode is before association. | |
238 | */ | |
239 | sdata->smps_mode = smps_mode; | |
240 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); | |
241 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || | |
242 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
243 | sta->known_smps_mode = smps_mode; | |
244 | } | |
0f78231b JB |
245 | } |
246 | } | |
247 | ||
f0425bed FF |
248 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
249 | { | |
250 | struct tid_ampdu_tx *tid_tx; | |
251 | ||
252 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
253 | if (!tid_tx) | |
254 | return; | |
255 | ||
256 | tid_tx->failed_bar_ssn = ssn; | |
257 | tid_tx->bar_pending = true; | |
258 | } | |
259 | ||
a2fe8166 HS |
260 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
261 | { | |
262 | int len = sizeof(struct ieee80211_radiotap_header); | |
263 | ||
264 | /* IEEE80211_RADIOTAP_RATE rate */ | |
265 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
266 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
267 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
268 | len += 2; |
269 | ||
270 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
271 | len += 2; | |
272 | ||
273 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
274 | len += 1; | |
275 | ||
a8241310 KB |
276 | /* IEEE80211_RADIOTAP_MCS |
277 | * IEEE80211_RADIOTAP_VHT */ | |
278 | if (info->status.rates[0].idx >= 0) { | |
279 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
280 | len += 3; | |
281 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
282 | len = ALIGN(len, 2) + 12; | |
283 | } | |
7f2a5e21 | 284 | |
a2fe8166 HS |
285 | return len; |
286 | } | |
287 | ||
2103dec1 | 288 | static void |
a8241310 KB |
289 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
290 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
291 | struct sk_buff *skb, int retry_count, |
292 | int rtap_len, int shift) | |
a2fe8166 HS |
293 | { |
294 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
295 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
296 | struct ieee80211_radiotap_header *rthdr; | |
297 | unsigned char *pos; | |
9c8f2c42 | 298 | u16 txflags; |
a2fe8166 | 299 | |
d58ff351 | 300 | rthdr = skb_push(skb, rtap_len); |
a2fe8166 HS |
301 | |
302 | memset(rthdr, 0, rtap_len); | |
303 | rthdr->it_len = cpu_to_le16(rtap_len); | |
304 | rthdr->it_present = | |
305 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
306 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
307 | pos = (unsigned char *)(rthdr + 1); | |
308 | ||
309 | /* | |
310 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
311 | * extensions proposal contains, we can actually report | |
312 | * the whole set of tries we did. | |
313 | */ | |
314 | ||
315 | /* IEEE80211_RADIOTAP_RATE */ | |
316 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
317 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
318 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
319 | u16 rate; |
320 | ||
a2fe8166 | 321 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
322 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
323 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
324 | /* padding for tx flags */ |
325 | pos += 2; | |
326 | } | |
327 | ||
328 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
329 | txflags = 0; | |
330 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
331 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 332 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 | 333 | |
311ab8e1 | 334 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
9c8f2c42 | 335 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
311ab8e1 | 336 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 337 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
338 | |
339 | put_unaligned_le16(txflags, pos); | |
340 | pos += 2; | |
341 | ||
342 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
343 | /* for now report the total retry_count */ | |
344 | *pos = retry_count; | |
345 | pos++; | |
7f2a5e21 | 346 | |
a8241310 KB |
347 | if (info->status.rates[0].idx < 0) |
348 | return; | |
349 | ||
350 | /* IEEE80211_RADIOTAP_MCS | |
351 | * IEEE80211_RADIOTAP_VHT */ | |
352 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
353 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
354 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
355 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
356 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
357 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
358 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
359 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
360 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
361 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
362 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
363 | pos[2] = info->status.rates[0].idx; | |
364 | pos += 3; | |
a8241310 KB |
365 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
366 | u16 known = local->hw.radiotap_vht_details & | |
367 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
368 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
369 | ||
370 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
371 | ||
372 | /* required alignment from rthdr */ | |
373 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 374 | |
a8241310 KB |
375 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
376 | put_unaligned_le16(known, pos); | |
377 | pos += 2; | |
378 | ||
379 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
380 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
381 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
382 | pos++; | |
383 | ||
384 | /* u8 bandwidth */ | |
385 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
386 | *pos = 1; | |
387 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
388 | *pos = 4; | |
389 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
390 | *pos = 11; | |
391 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
392 | *pos = 0; | |
393 | pos++; | |
394 | ||
395 | /* u8 mcs_nss[4] */ | |
396 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
397 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
398 | pos += 4; | |
399 | ||
400 | /* u8 coding */ | |
401 | pos++; | |
402 | /* u8 group_id */ | |
403 | pos++; | |
404 | /* u16 partial_aid */ | |
405 | pos += 2; | |
406 | } | |
a2fe8166 HS |
407 | } |
408 | ||
1277b4a9 LK |
409 | /* |
410 | * Handles the tx for TDLS teardown frames. | |
411 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP | |
412 | */ | |
413 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, | |
414 | struct ieee80211_sub_if_data *sdata, | |
415 | struct sk_buff *skb, u32 flags) | |
416 | { | |
417 | struct sk_buff *teardown_skb; | |
418 | struct sk_buff *orig_teardown_skb; | |
419 | bool is_teardown = false; | |
420 | ||
421 | /* Get the teardown data we need and free the lock */ | |
422 | spin_lock(&sdata->u.mgd.teardown_lock); | |
423 | teardown_skb = sdata->u.mgd.teardown_skb; | |
424 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; | |
425 | if ((skb == orig_teardown_skb) && teardown_skb) { | |
426 | sdata->u.mgd.teardown_skb = NULL; | |
427 | sdata->u.mgd.orig_teardown_skb = NULL; | |
428 | is_teardown = true; | |
429 | } | |
430 | spin_unlock(&sdata->u.mgd.teardown_lock); | |
431 | ||
432 | if (is_teardown) { | |
433 | /* This mechanism relies on being able to get ACKs */ | |
30686bf7 | 434 | WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); |
1277b4a9 LK |
435 | |
436 | /* Check if peer has ACKed */ | |
437 | if (flags & IEEE80211_TX_STAT_ACK) { | |
438 | dev_kfree_skb_any(teardown_skb); | |
439 | } else { | |
440 | tdls_dbg(sdata, | |
441 | "TDLS Resending teardown through AP\n"); | |
442 | ||
443 | ieee80211_subif_start_xmit(teardown_skb, skb->dev); | |
444 | } | |
445 | } | |
446 | } | |
447 | ||
b2eb0ee6 JB |
448 | static struct ieee80211_sub_if_data * |
449 | ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) | |
450 | { | |
451 | struct ieee80211_sub_if_data *sdata; | |
452 | ||
453 | if (skb->dev) { | |
454 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
455 | if (!sdata->dev) | |
456 | continue; | |
457 | ||
458 | if (skb->dev == sdata->dev) | |
459 | return sdata; | |
460 | } | |
461 | ||
462 | return NULL; | |
463 | } | |
464 | ||
465 | return rcu_dereference(local->p2p_sdata); | |
466 | } | |
467 | ||
468 | static void ieee80211_report_ack_skb(struct ieee80211_local *local, | |
469 | struct ieee80211_tx_info *info, | |
470 | bool acked, bool dropped) | |
471 | { | |
472 | struct sk_buff *skb; | |
473 | unsigned long flags; | |
474 | ||
475 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
d3e709e6 | 476 | skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); |
b2eb0ee6 JB |
477 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
478 | ||
479 | if (!skb) | |
480 | return; | |
481 | ||
b2eb0ee6 | 482 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
3b79af97 | 483 | u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; |
b2eb0ee6 | 484 | struct ieee80211_sub_if_data *sdata; |
3b79af97 | 485 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2eb0ee6 JB |
486 | |
487 | rcu_read_lock(); | |
488 | sdata = ieee80211_sdata_from_skb(local, skb); | |
3b79af97 JB |
489 | if (sdata) { |
490 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
491 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
492 | cfg80211_probe_status(sdata->dev, hdr->addr1, | |
a78b26ff VN |
493 | cookie, acked, |
494 | info->status.ack_signal, | |
495 | info->status.is_valid_ack_signal, | |
3b79af97 JB |
496 | GFP_ATOMIC); |
497 | else | |
498 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, | |
499 | skb->data, skb->len, | |
500 | acked, GFP_ATOMIC); | |
501 | } | |
b2eb0ee6 JB |
502 | rcu_read_unlock(); |
503 | ||
8682250b AO |
504 | dev_kfree_skb_any(skb); |
505 | } else if (dropped) { | |
b2eb0ee6 JB |
506 | dev_kfree_skb_any(skb); |
507 | } else { | |
508 | /* consumes skb */ | |
509 | skb_complete_wifi_ack(skb, acked); | |
510 | } | |
511 | } | |
512 | ||
8a2fbedc JB |
513 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
514 | struct sk_buff *skb, bool dropped) | |
515 | { | |
516 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
517 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
518 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
519 | ||
520 | if (dropped) | |
521 | acked = false; | |
522 | ||
3b79af97 | 523 | if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
b2eb0ee6 | 524 | struct ieee80211_sub_if_data *sdata; |
8a2fbedc JB |
525 | |
526 | rcu_read_lock(); | |
527 | ||
b2eb0ee6 | 528 | sdata = ieee80211_sdata_from_skb(local, skb); |
8a2fbedc | 529 | |
1672c0e3 | 530 | if (!sdata) { |
8a2fbedc | 531 | skb->dev = NULL; |
75dbf00b | 532 | } else { |
1277b4a9 LK |
533 | unsigned int hdr_size = |
534 | ieee80211_hdrlen(hdr->frame_control); | |
535 | ||
536 | /* Check to see if packet is a TDLS teardown packet */ | |
537 | if (ieee80211_is_data(hdr->frame_control) && | |
538 | (ieee80211_get_tdls_action(skb, hdr_size) == | |
539 | WLAN_TDLS_TEARDOWN)) | |
540 | ieee80211_tdls_td_tx_handle(local, sdata, skb, | |
541 | info->flags); | |
542 | else | |
543 | ieee80211_mgd_conn_tx_status(sdata, | |
544 | hdr->frame_control, | |
545 | acked); | |
8a2fbedc JB |
546 | } |
547 | ||
548 | rcu_read_unlock(); | |
b2eb0ee6 JB |
549 | } else if (info->ack_frame_id) { |
550 | ieee80211_report_ack_skb(local, info, acked, dropped); | |
8a2fbedc | 551 | } |
2cc6f5a7 JB |
552 | |
553 | if (!dropped && skb->destructor) { | |
554 | skb->wifi_acked_valid = 1; | |
555 | skb->wifi_acked = acked; | |
556 | } | |
5d473fed BA |
557 | |
558 | ieee80211_led_tx(local); | |
8a2fbedc JB |
559 | } |
560 | ||
99ba2a14 JB |
561 | /* |
562 | * Use a static threshold for now, best value to be determined | |
563 | * by testing ... | |
564 | * Should it depend on: | |
565 | * - on # of retransmissions | |
566 | * - current throughput (higher value for higher tpt)? | |
567 | */ | |
568 | #define STA_LOST_PKT_THRESHOLD 50 | |
9d58f25b LK |
569 | #define STA_LOST_TDLS_PKT_THRESHOLD 10 |
570 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ | |
99ba2a14 | 571 | |
ad9dda63 FF |
572 | static void ieee80211_lost_packet(struct sta_info *sta, |
573 | struct ieee80211_tx_info *info) | |
abd43a6a | 574 | { |
e8a24cd4 RM |
575 | /* If driver relies on its own algorithm for station kickout, skip |
576 | * mac80211 packet loss mechanism. | |
577 | */ | |
578 | if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) | |
579 | return; | |
580 | ||
abd43a6a FF |
581 | /* This packet was aggregated but doesn't carry status info */ |
582 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
583 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
584 | return; | |
585 | ||
e5a9f8d0 JB |
586 | sta->status_stats.lost_packets++; |
587 | if (!sta->sta.tdls && | |
588 | sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) | |
9d58f25b LK |
589 | return; |
590 | ||
591 | /* | |
592 | * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD | |
593 | * of the last packets were lost, and that no ACK was received in the | |
594 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss | |
595 | * mechanism. | |
596 | */ | |
597 | if (sta->sta.tdls && | |
e5a9f8d0 | 598 | (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || |
9d58f25b | 599 | time_before(jiffies, |
e5a9f8d0 JB |
600 | sta->status_stats.last_tdls_pkt_time + |
601 | STA_LOST_TDLS_PKT_TIME))) | |
abd43a6a FF |
602 | return; |
603 | ||
604 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
e5a9f8d0 JB |
605 | sta->status_stats.lost_packets, GFP_ATOMIC); |
606 | sta->status_stats.lost_packets = 0; | |
abd43a6a FF |
607 | } |
608 | ||
7e1cdcbb FF |
609 | static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, |
610 | struct ieee80211_tx_info *info, | |
611 | int *retry_count) | |
fe7a5d5c | 612 | { |
0c869808 | 613 | int rates_idx = -1; |
7e1cdcbb FF |
614 | int count = -1; |
615 | int i; | |
fe7a5d5c JB |
616 | |
617 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
618 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
619 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
620 | /* just the first aggr frame carry status info */ | |
621 | info->status.rates[i].idx = -1; | |
622 | info->status.rates[i].count = 0; | |
623 | break; | |
624 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
625 | break; |
626 | } else if (i >= hw->max_report_rates) { | |
627 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
628 | info->status.rates[i].idx = -1; |
629 | info->status.rates[i].count = 0; | |
be7974aa | 630 | break; |
fe7a5d5c JB |
631 | } |
632 | ||
7e1cdcbb | 633 | count += info->status.rates[i].count; |
fe7a5d5c | 634 | } |
be7974aa HS |
635 | rates_idx = i - 1; |
636 | ||
7e1cdcbb FF |
637 | if (count < 0) |
638 | count = 0; | |
639 | ||
640 | *retry_count = count; | |
641 | return rates_idx; | |
642 | } | |
643 | ||
4dc792b8 HS |
644 | void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, |
645 | struct ieee80211_supported_band *sband, | |
646 | int retry_count, int shift, bool send_to_cooked) | |
7e1cdcbb FF |
647 | { |
648 | struct sk_buff *skb2; | |
4dc792b8 HS |
649 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
650 | struct ieee80211_sub_if_data *sdata; | |
651 | struct net_device *prev_dev = NULL; | |
652 | int rtap_len; | |
653 | ||
654 | /* send frame to monitor interfaces now */ | |
655 | rtap_len = ieee80211_tx_radiotap_len(info); | |
656 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
657 | pr_err("ieee80211_tx_status: headroom too small\n"); | |
658 | dev_kfree_skb(skb); | |
659 | return; | |
660 | } | |
661 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, | |
662 | rtap_len, shift); | |
663 | ||
664 | /* XXX: is this sufficient for BPF? */ | |
d57a544d | 665 | skb_reset_mac_header(skb); |
4dc792b8 HS |
666 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
667 | skb->pkt_type = PACKET_OTHERHOST; | |
668 | skb->protocol = htons(ETH_P_802_2); | |
669 | memset(skb->cb, 0, sizeof(skb->cb)); | |
670 | ||
671 | rcu_read_lock(); | |
672 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
673 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
674 | if (!ieee80211_sdata_running(sdata)) | |
675 | continue; | |
676 | ||
d8212184 | 677 | if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && |
4dc792b8 HS |
678 | !send_to_cooked) |
679 | continue; | |
680 | ||
681 | if (prev_dev) { | |
682 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
683 | if (skb2) { | |
684 | skb2->dev = prev_dev; | |
685 | netif_rx(skb2); | |
686 | } | |
687 | } | |
688 | ||
689 | prev_dev = sdata->dev; | |
690 | } | |
691 | } | |
692 | if (prev_dev) { | |
693 | skb->dev = prev_dev; | |
694 | netif_rx(skb); | |
695 | skb = NULL; | |
696 | } | |
697 | rcu_read_unlock(); | |
698 | dev_kfree_skb(skb); | |
699 | } | |
700 | ||
5fe49a9d FF |
701 | static void __ieee80211_tx_status(struct ieee80211_hw *hw, |
702 | struct ieee80211_tx_status *status) | |
4dc792b8 | 703 | { |
5fe49a9d | 704 | struct sk_buff *skb = status->skb; |
7e1cdcbb FF |
705 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
706 | struct ieee80211_local *local = hw_to_local(hw); | |
5fe49a9d FF |
707 | struct ieee80211_tx_info *info = status->info; |
708 | struct sta_info *sta; | |
7e1cdcbb FF |
709 | __le16 fc; |
710 | struct ieee80211_supported_band *sband; | |
7e1cdcbb FF |
711 | int retry_count; |
712 | int rates_idx; | |
713 | bool send_to_cooked; | |
714 | bool acked; | |
715 | struct ieee80211_bar *bar; | |
7e1cdcbb | 716 | int shift = 0; |
5e06a9e8 | 717 | int tid = IEEE80211_NUM_TIDS; |
7e1cdcbb FF |
718 | |
719 | rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); | |
fe7a5d5c | 720 | |
fe7a5d5c | 721 | sband = local->hw.wiphy->bands[info->band]; |
375177bf | 722 | fc = hdr->frame_control; |
fe7a5d5c | 723 | |
5fe49a9d FF |
724 | if (status->sta) { |
725 | sta = container_of(status->sta, struct sta_info, sta); | |
2103dec1 SW |
726 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
727 | ||
47086fc5 | 728 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 729 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 730 | |
04ac3c0e | 731 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
71f2c347 MH |
732 | |
733 | /* mesh Peer Service Period support */ | |
734 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
735 | ieee80211_is_data_qos(fc)) | |
736 | ieee80211_mpsp_trigger_process( | |
737 | ieee80211_get_qos_ctl(hdr), sta, true, acked); | |
738 | ||
c2c98fde | 739 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
740 | /* |
741 | * The STA is in power save mode, so assume | |
742 | * that this TX packet failed because of that. | |
743 | */ | |
744 | ieee80211_handle_filtered_frame(local, sta, skb); | |
fe7a5d5c JB |
745 | return; |
746 | } | |
747 | ||
30686bf7 | 748 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && |
00a9a6d1 | 749 | (ieee80211_is_data(hdr->frame_control)) && |
0c869808 | 750 | (rates_idx != -1)) |
e5a9f8d0 JB |
751 | sta->tx_stats.last_rate = |
752 | info->status.rates[rates_idx]; | |
0c869808 | 753 | |
fe7a5d5c JB |
754 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
755 | (ieee80211_is_data_qos(fc))) { | |
79c892b8 | 756 | u16 ssn; |
fe7a5d5c JB |
757 | u8 *qc; |
758 | ||
759 | qc = ieee80211_get_qos_ctl(hdr); | |
760 | tid = qc[0] & 0xf; | |
761 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
762 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 763 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c | 764 | tid, ssn); |
79c892b8 JB |
765 | } else if (ieee80211_is_data_qos(fc)) { |
766 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
767 | ||
768 | tid = qc[0] & 0xf; | |
fe7a5d5c JB |
769 | } |
770 | ||
e69deded | 771 | if (!acked && ieee80211_is_back_req(fc)) { |
79c892b8 | 772 | u16 control; |
7107676a | 773 | |
e69deded | 774 | /* |
7107676a FF |
775 | * BAR failed, store the last SSN and retry sending |
776 | * the BAR when the next unicast transmission on the | |
777 | * same TID succeeds. | |
e69deded HS |
778 | */ |
779 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
780 | control = le16_to_cpu(bar->control); |
781 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
782 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
783 | ||
7107676a | 784 | tid = (control & |
e69deded HS |
785 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
786 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 787 | |
8df6b7b1 | 788 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
789 | } |
790 | } | |
791 | ||
fe7a5d5c JB |
792 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
793 | ieee80211_handle_filtered_frame(local, sta, skb); | |
fe7a5d5c JB |
794 | return; |
795 | } else { | |
04ac3c0e | 796 | if (!acked) |
e5a9f8d0 JB |
797 | sta->status_stats.retry_failed++; |
798 | sta->status_stats.retry_count += retry_count; | |
79c892b8 JB |
799 | |
800 | if (ieee80211_is_data_present(fc)) { | |
801 | if (!acked) | |
e5a9f8d0 JB |
802 | sta->status_stats.msdu_failed[tid]++; |
803 | ||
804 | sta->status_stats.msdu_retries[tid] += | |
805 | retry_count; | |
79c892b8 | 806 | } |
fe7a5d5c JB |
807 | } |
808 | ||
5fe49a9d | 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 | ||
fe7a5d5c JB |
836 | /* SNMP counters |
837 | * Fragments are passed to low-level drivers as separate skbs, so these | |
838 | * are actually fragments, not frames. Update frame counters only for | |
839 | * the first fragment of the frame. */ | |
5cf16616 SM |
840 | if ((info->flags & IEEE80211_TX_STAT_ACK) || |
841 | (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { | |
adf5ace5 | 842 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
c206ca67 | 843 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
85b89af0 | 844 | if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
c206ca67 | 845 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
fe7a5d5c | 846 | if (retry_count > 0) |
c206ca67 | 847 | I802_DEBUG_INC(local->dot11RetryCount); |
fe7a5d5c | 848 | if (retry_count > 1) |
c206ca67 | 849 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
fe7a5d5c JB |
850 | } |
851 | ||
852 | /* This counter shall be incremented for an acknowledged MPDU | |
853 | * with an individual address in the address 1 field or an MPDU | |
854 | * with a multicast address in the address 1 field of type Data | |
855 | * or Management. */ | |
856 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
857 | ieee80211_is_data(fc) || |
858 | ieee80211_is_mgmt(fc)) | |
c206ca67 | 859 | I802_DEBUG_INC(local->dot11TransmittedFragmentCount); |
fe7a5d5c | 860 | } else { |
adf5ace5 | 861 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
c206ca67 | 862 | I802_DEBUG_INC(local->dot11FailedCount); |
fe7a5d5c JB |
863 | } |
864 | ||
375177bf | 865 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
30686bf7 | 866 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
375177bf VN |
867 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
868 | local->ps_sdata && !(local->scanning)) { | |
869 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
870 | local->ps_sdata->u.mgd.flags |= | |
871 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
872 | } else |
873 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
874 | msecs_to_jiffies(10)); | |
875 | } | |
876 | ||
8a2fbedc | 877 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 878 | |
fe7a5d5c JB |
879 | /* this was a transmitted frame, but now we want to reuse it */ |
880 | skb_orphan(skb); | |
881 | ||
eaf55530 FF |
882 | /* Need to make a copy before skb->cb gets cleared */ |
883 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 884 | !(ieee80211_is_data(fc)); |
eaf55530 | 885 | |
fe7a5d5c JB |
886 | /* |
887 | * This is a bit racy but we can avoid a lot of work | |
888 | * with this test... | |
889 | */ | |
eaf55530 | 890 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
891 | dev_kfree_skb(skb); |
892 | return; | |
893 | } | |
894 | ||
4dc792b8 HS |
895 | /* send to monitor interfaces */ |
896 | ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked); | |
fe7a5d5c | 897 | } |
5fe49a9d FF |
898 | |
899 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) | |
900 | { | |
901 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
902 | struct ieee80211_local *local = hw_to_local(hw); | |
903 | struct ieee80211_tx_status status = { | |
904 | .skb = skb, | |
905 | .info = IEEE80211_SKB_CB(skb), | |
906 | }; | |
907 | struct rhlist_head *tmp; | |
908 | struct sta_info *sta; | |
909 | ||
910 | rcu_read_lock(); | |
911 | ||
912 | for_each_sta_info(local, hdr->addr1, sta, tmp) { | |
913 | /* skip wrong virtual interface */ | |
914 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) | |
915 | continue; | |
916 | ||
917 | status.sta = &sta->sta; | |
918 | break; | |
919 | } | |
920 | ||
921 | __ieee80211_tx_status(hw, &status); | |
922 | rcu_read_unlock(); | |
923 | } | |
fe7a5d5c | 924 | EXPORT_SYMBOL(ieee80211_tx_status); |
8178d38b | 925 | |
5fe49a9d FF |
926 | void ieee80211_tx_status_ext(struct ieee80211_hw *hw, |
927 | struct ieee80211_tx_status *status) | |
eefebd31 FF |
928 | { |
929 | struct ieee80211_local *local = hw_to_local(hw); | |
5fe49a9d FF |
930 | struct ieee80211_tx_info *info = status->info; |
931 | struct ieee80211_sta *pubsta = status->sta; | |
eefebd31 | 932 | struct ieee80211_supported_band *sband; |
eefebd31 FF |
933 | int retry_count; |
934 | bool acked, noack_success; | |
935 | ||
5fe49a9d FF |
936 | if (status->skb) |
937 | return __ieee80211_tx_status(hw, status); | |
938 | ||
939 | if (!status->sta) | |
940 | return; | |
941 | ||
eefebd31 FF |
942 | ieee80211_tx_get_rates(hw, info, &retry_count); |
943 | ||
944 | sband = hw->wiphy->bands[info->band]; | |
945 | ||
946 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
947 | noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); | |
948 | ||
949 | if (pubsta) { | |
950 | struct sta_info *sta; | |
951 | ||
952 | sta = container_of(pubsta, struct sta_info, sta); | |
953 | ||
954 | if (!acked) | |
955 | sta->status_stats.retry_failed++; | |
956 | sta->status_stats.retry_count += retry_count; | |
957 | ||
958 | if (acked) { | |
959 | sta->status_stats.last_ack = jiffies; | |
960 | ||
961 | if (sta->status_stats.lost_packets) | |
962 | sta->status_stats.lost_packets = 0; | |
963 | ||
964 | /* Track when last TDLS packet was ACKed */ | |
965 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
966 | sta->status_stats.last_tdls_pkt_time = jiffies; | |
967 | } else { | |
968 | ieee80211_lost_packet(sta, info); | |
969 | } | |
970 | ||
5fe49a9d | 971 | rate_control_tx_status(local, sband, status); |
eefebd31 FF |
972 | } |
973 | ||
974 | if (acked || noack_success) { | |
975 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); | |
976 | if (!pubsta) | |
977 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); | |
978 | if (retry_count > 0) | |
979 | I802_DEBUG_INC(local->dot11RetryCount); | |
980 | if (retry_count > 1) | |
981 | I802_DEBUG_INC(local->dot11MultipleRetryCount); | |
982 | } else { | |
983 | I802_DEBUG_INC(local->dot11FailedCount); | |
984 | } | |
985 | } | |
5fe49a9d | 986 | EXPORT_SYMBOL(ieee80211_tx_status_ext); |
eefebd31 | 987 | |
8178d38b AN |
988 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
989 | { | |
990 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
991 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
992 | num_packets, GFP_ATOMIC); | |
993 | } | |
994 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
995 | |
996 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
997 | { | |
a729cff8 | 998 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 999 | |
8a2fbedc | 1000 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
1001 | dev_kfree_skb_any(skb); |
1002 | } | |
1003 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
1004 | |
1005 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
1006 | struct sk_buff_head *skbs) | |
1007 | { | |
1008 | struct sk_buff *skb; | |
1009 | ||
1010 | while ((skb = __skb_dequeue(skbs))) | |
1011 | ieee80211_free_txskb(hw, skb); | |
1012 | } |