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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
fe7a5d5c JB |
2 | /* |
3 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
026331c4 | 6 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 7 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
fe7a5d5c JB |
8 | */ |
9 | ||
bc3b2d7f | 10 | #include <linux/export.h> |
888d04df | 11 | #include <linux/etherdevice.h> |
fe7a5d5c | 12 | #include <net/mac80211.h> |
d26ad377 | 13 | #include <asm/unaligned.h> |
fe7a5d5c JB |
14 | #include "ieee80211_i.h" |
15 | #include "rate.h" | |
16 | #include "mesh.h" | |
17 | #include "led.h" | |
948d887d | 18 | #include "wme.h" |
fe7a5d5c JB |
19 | |
20 | ||
21 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
22 | struct sk_buff *skb) | |
23 | { | |
24 | struct ieee80211_local *local = hw_to_local(hw); | |
25 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
26 | int tmp; | |
27 | ||
28 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
29 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? | |
30 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
31 | tmp = skb_queue_len(&local->skb_queue) + | |
32 | skb_queue_len(&local->skb_queue_unreliable); | |
33 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
34 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
c3e7724b | 35 | ieee80211_free_txskb(hw, skb); |
fe7a5d5c JB |
36 | tmp--; |
37 | I802_DEBUG_INC(local->tx_status_drop); | |
38 | } | |
39 | tasklet_schedule(&local->tasklet); | |
40 | } | |
41 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
42 | ||
43 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, | |
44 | struct sta_info *sta, | |
45 | struct sk_buff *skb) | |
46 | { | |
47 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
948d887d JB |
48 | struct ieee80211_hdr *hdr = (void *)skb->data; |
49 | int ac; | |
fe7a5d5c | 50 | |
890030d3 FF |
51 | if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | |
52 | IEEE80211_TX_CTL_AMPDU)) { | |
da629cf1 HS |
53 | ieee80211_free_txskb(&local->hw, skb); |
54 | return; | |
55 | } | |
56 | ||
697e6a0f JB |
57 | /* |
58 | * This skb 'survived' a round-trip through the driver, and | |
59 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 60 | * we can definitely not rely on the control information |
c6fcf6bc JB |
61 | * being correct. Clear it so we don't get junk there, and |
62 | * indicate that it needs new processing, but must not be | |
63 | * modified/encrypted again. | |
697e6a0f JB |
64 | */ |
65 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
66 | |
67 | info->control.jiffies = jiffies; | |
68 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
69 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
70 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 71 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 72 | |
e5a9f8d0 | 73 | sta->status_stats.filtered++; |
fe7a5d5c | 74 | |
8a8656fa JB |
75 | /* |
76 | * Clear more-data bit on filtered frames, it might be set | |
77 | * but later frames might time out so it might have to be | |
78 | * clear again ... It's all rather unlikely (this frame | |
79 | * should time out first, right?) but let's not confuse | |
80 | * peers unnecessarily. | |
81 | */ | |
82 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
83 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
84 | ||
948d887d | 85 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
86 | u8 *p = ieee80211_get_qos_ctl(hdr); |
87 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
88 | ||
89 | /* | |
90 | * Clear EOSP if set, this could happen e.g. | |
91 | * if an absence period (us being a P2P GO) | |
92 | * shortens the SP. | |
93 | */ | |
94 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
95 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
731977e9 | 96 | ac = ieee80211_ac_from_tid(tid); |
948d887d JB |
97 | } else { |
98 | ac = IEEE80211_AC_BE; | |
99 | } | |
100 | ||
fe7a5d5c JB |
101 | /* |
102 | * Clear the TX filter mask for this STA when sending the next | |
103 | * packet. If the STA went to power save mode, this will happen | |
104 | * when it wakes up for the next time. | |
105 | */ | |
c2c98fde | 106 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
f7418bc1 | 107 | ieee80211_clear_fast_xmit(sta); |
fe7a5d5c JB |
108 | |
109 | /* | |
110 | * This code races in the following way: | |
111 | * | |
112 | * (1) STA sends frame indicating it will go to sleep and does so | |
113 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
114 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
115 | * (4) we get TX status before having processed the frame and | |
116 | * knowing that the STA has gone to sleep. | |
117 | * | |
118 | * This is actually quite unlikely even when both those events are | |
119 | * processed from interrupts coming in quickly after one another or | |
120 | * even at the same time because we queue both TX status events and | |
121 | * RX frames to be processed by a tasklet and process them in the | |
122 | * same order that they were received or TX status last. Hence, there | |
123 | * is no race as long as the frame RX is processed before the next TX | |
124 | * status, which drivers can ensure, see below. | |
125 | * | |
126 | * Note that this can only happen if the hardware or firmware can | |
127 | * actually add STAs to the filter list, if this is done by the | |
128 | * driver in response to set_tim() (which will only reduce the race | |
129 | * this whole filtering tries to solve, not completely solve it) | |
130 | * this situation cannot happen. | |
131 | * | |
132 | * To completely solve this race drivers need to make sure that they | |
133 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
134 | * functions and | |
135 | * (b) always process RX events before TX status events if ordering | |
136 | * can be unknown, for example with different interrupt status | |
137 | * bits. | |
d057e5a3 AN |
138 | * (c) if PS mode transitions are manual (i.e. the flag |
139 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
140 | * changes before calling TX status events if ordering can be | |
141 | * unknown. | |
fe7a5d5c | 142 | */ |
c2c98fde | 143 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
948d887d JB |
144 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
145 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 146 | sta_info_recalc_tim(sta); |
60750397 JB |
147 | |
148 | if (!timer_pending(&local->sta_cleanup)) | |
149 | mod_timer(&local->sta_cleanup, | |
150 | round_jiffies(jiffies + | |
151 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
152 | return; |
153 | } | |
154 | ||
c2c98fde | 155 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
fe7a5d5c JB |
156 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
157 | /* Software retry the packet once */ | |
158 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
159 | ieee80211_add_pending_skb(local, skb); | |
160 | return; | |
161 | } | |
162 | ||
bdcbd8e0 JB |
163 | ps_dbg_ratelimited(sta->sdata, |
164 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
165 | skb_queue_len(&sta->tx_filtered[ac]), | |
166 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); | |
c3e7724b | 167 | ieee80211_free_txskb(&local->hw, skb); |
fe7a5d5c JB |
168 | } |
169 | ||
f0425bed FF |
170 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
171 | { | |
172 | struct tid_ampdu_tx *tid_tx; | |
173 | ||
174 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
175 | if (!tid_tx || !tid_tx->bar_pending) | |
176 | return; | |
177 | ||
178 | tid_tx->bar_pending = false; | |
8c771244 | 179 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
180 | } |
181 | ||
0f78231b JB |
182 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
183 | { | |
184 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
185 | struct ieee80211_local *local = sta->local; | |
186 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
a78b26ff | 187 | struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); |
0f78231b | 188 | |
a78b26ff | 189 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
b8da6b6a | 190 | sta->status_stats.last_ack = jiffies; |
a78b26ff VN |
191 | if (txinfo->status.is_valid_ack_signal) { |
192 | sta->status_stats.last_ack_signal = | |
193 | (s8)txinfo->status.ack_signal; | |
194 | sta->status_stats.ack_signal_filled = true; | |
cc60dbbf BP |
195 | ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, |
196 | -txinfo->status.ack_signal); | |
a78b26ff VN |
197 | } |
198 | } | |
0c5b9329 | 199 | |
f0425bed FF |
200 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
201 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
202 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
203 | u16 tid = qc[0] & 0xf; | |
204 | ||
205 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
206 | } | |
207 | ||
0f78231b | 208 | if (ieee80211_is_action(mgmt->frame_control) && |
cf147085 | 209 | !ieee80211_has_protected(mgmt->frame_control) && |
0f78231b | 210 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 | 211 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
04ecd257 | 212 | ieee80211_sdata_running(sdata)) { |
687da132 EG |
213 | enum ieee80211_smps_mode smps_mode; |
214 | ||
0f78231b JB |
215 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
216 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
687da132 | 217 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
218 | break; |
219 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
687da132 | 220 | smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
221 | break; |
222 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
223 | default: /* shouldn't happen since we don't send that */ | |
687da132 | 224 | smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
225 | break; |
226 | } | |
227 | ||
687da132 EG |
228 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
229 | /* | |
230 | * This update looks racy, but isn't -- if we come | |
231 | * here we've definitely got a station that we're | |
232 | * talking to, and on a managed interface that can | |
233 | * only be the AP. And the only other place updating | |
234 | * this variable in managed mode is before association. | |
235 | */ | |
236 | sdata->smps_mode = smps_mode; | |
237 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); | |
238 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || | |
239 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
240 | sta->known_smps_mode = smps_mode; | |
241 | } | |
0f78231b JB |
242 | } |
243 | } | |
244 | ||
f0425bed FF |
245 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
246 | { | |
247 | struct tid_ampdu_tx *tid_tx; | |
248 | ||
249 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
250 | if (!tid_tx) | |
251 | return; | |
252 | ||
253 | tid_tx->failed_bar_ssn = ssn; | |
254 | tid_tx->bar_pending = true; | |
255 | } | |
256 | ||
a2fe8166 HS |
257 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
258 | { | |
259 | int len = sizeof(struct ieee80211_radiotap_header); | |
260 | ||
261 | /* IEEE80211_RADIOTAP_RATE rate */ | |
262 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
263 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
264 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
265 | len += 2; |
266 | ||
267 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
268 | len += 2; | |
269 | ||
270 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
271 | len += 1; | |
272 | ||
a8241310 KB |
273 | /* IEEE80211_RADIOTAP_MCS |
274 | * IEEE80211_RADIOTAP_VHT */ | |
275 | if (info->status.rates[0].idx >= 0) { | |
276 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
277 | len += 3; | |
278 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
279 | len = ALIGN(len, 2) + 12; | |
280 | } | |
7f2a5e21 | 281 | |
a2fe8166 HS |
282 | return len; |
283 | } | |
284 | ||
2103dec1 | 285 | static void |
a8241310 KB |
286 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
287 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
288 | struct sk_buff *skb, int retry_count, |
289 | int rtap_len, int shift) | |
a2fe8166 HS |
290 | { |
291 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
292 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
293 | struct ieee80211_radiotap_header *rthdr; | |
294 | unsigned char *pos; | |
9c8f2c42 | 295 | u16 txflags; |
a2fe8166 | 296 | |
d58ff351 | 297 | rthdr = skb_push(skb, rtap_len); |
a2fe8166 HS |
298 | |
299 | memset(rthdr, 0, rtap_len); | |
300 | rthdr->it_len = cpu_to_le16(rtap_len); | |
301 | rthdr->it_present = | |
302 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
303 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
304 | pos = (unsigned char *)(rthdr + 1); | |
305 | ||
306 | /* | |
307 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
308 | * extensions proposal contains, we can actually report | |
309 | * the whole set of tries we did. | |
310 | */ | |
311 | ||
312 | /* IEEE80211_RADIOTAP_RATE */ | |
313 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
314 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
315 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
316 | u16 rate; |
317 | ||
a2fe8166 | 318 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
319 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
320 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
321 | /* padding for tx flags */ |
322 | pos += 2; | |
323 | } | |
324 | ||
325 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
326 | txflags = 0; | |
327 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
328 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 329 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 | 330 | |
311ab8e1 | 331 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
9c8f2c42 | 332 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
311ab8e1 | 333 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 334 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
335 | |
336 | put_unaligned_le16(txflags, pos); | |
337 | pos += 2; | |
338 | ||
339 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
340 | /* for now report the total retry_count */ | |
341 | *pos = retry_count; | |
342 | pos++; | |
7f2a5e21 | 343 | |
a8241310 KB |
344 | if (info->status.rates[0].idx < 0) |
345 | return; | |
346 | ||
347 | /* IEEE80211_RADIOTAP_MCS | |
348 | * IEEE80211_RADIOTAP_VHT */ | |
349 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
350 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
351 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
352 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
353 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
354 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
355 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
356 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
357 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
358 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
359 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
360 | pos[2] = info->status.rates[0].idx; | |
361 | pos += 3; | |
a8241310 KB |
362 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
363 | u16 known = local->hw.radiotap_vht_details & | |
364 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
365 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
366 | ||
367 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
368 | ||
369 | /* required alignment from rthdr */ | |
370 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 371 | |
a8241310 KB |
372 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
373 | put_unaligned_le16(known, pos); | |
374 | pos += 2; | |
375 | ||
376 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
377 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
378 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
379 | pos++; | |
380 | ||
381 | /* u8 bandwidth */ | |
382 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
383 | *pos = 1; | |
384 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
385 | *pos = 4; | |
386 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
387 | *pos = 11; | |
388 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
389 | *pos = 0; | |
390 | pos++; | |
391 | ||
392 | /* u8 mcs_nss[4] */ | |
393 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
394 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
395 | pos += 4; | |
396 | ||
397 | /* u8 coding */ | |
398 | pos++; | |
399 | /* u8 group_id */ | |
400 | pos++; | |
401 | /* u16 partial_aid */ | |
402 | pos += 2; | |
403 | } | |
a2fe8166 HS |
404 | } |
405 | ||
1277b4a9 LK |
406 | /* |
407 | * Handles the tx for TDLS teardown frames. | |
408 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP | |
409 | */ | |
410 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, | |
411 | struct ieee80211_sub_if_data *sdata, | |
412 | struct sk_buff *skb, u32 flags) | |
413 | { | |
414 | struct sk_buff *teardown_skb; | |
415 | struct sk_buff *orig_teardown_skb; | |
416 | bool is_teardown = false; | |
417 | ||
418 | /* Get the teardown data we need and free the lock */ | |
419 | spin_lock(&sdata->u.mgd.teardown_lock); | |
420 | teardown_skb = sdata->u.mgd.teardown_skb; | |
421 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; | |
422 | if ((skb == orig_teardown_skb) && teardown_skb) { | |
423 | sdata->u.mgd.teardown_skb = NULL; | |
424 | sdata->u.mgd.orig_teardown_skb = NULL; | |
425 | is_teardown = true; | |
426 | } | |
427 | spin_unlock(&sdata->u.mgd.teardown_lock); | |
428 | ||
429 | if (is_teardown) { | |
430 | /* This mechanism relies on being able to get ACKs */ | |
30686bf7 | 431 | WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); |
1277b4a9 LK |
432 | |
433 | /* Check if peer has ACKed */ | |
434 | if (flags & IEEE80211_TX_STAT_ACK) { | |
435 | dev_kfree_skb_any(teardown_skb); | |
436 | } else { | |
437 | tdls_dbg(sdata, | |
438 | "TDLS Resending teardown through AP\n"); | |
439 | ||
440 | ieee80211_subif_start_xmit(teardown_skb, skb->dev); | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
b2eb0ee6 JB |
445 | static struct ieee80211_sub_if_data * |
446 | ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) | |
447 | { | |
448 | struct ieee80211_sub_if_data *sdata; | |
449 | ||
450 | if (skb->dev) { | |
451 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
452 | if (!sdata->dev) | |
453 | continue; | |
454 | ||
455 | if (skb->dev == sdata->dev) | |
456 | return sdata; | |
457 | } | |
458 | ||
459 | return NULL; | |
460 | } | |
461 | ||
462 | return rcu_dereference(local->p2p_sdata); | |
463 | } | |
464 | ||
465 | static void ieee80211_report_ack_skb(struct ieee80211_local *local, | |
466 | struct ieee80211_tx_info *info, | |
467 | bool acked, bool dropped) | |
468 | { | |
469 | struct sk_buff *skb; | |
470 | unsigned long flags; | |
471 | ||
472 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
d3e709e6 | 473 | skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); |
b2eb0ee6 JB |
474 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
475 | ||
476 | if (!skb) | |
477 | return; | |
478 | ||
b2eb0ee6 | 479 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
3b79af97 | 480 | u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; |
b2eb0ee6 | 481 | struct ieee80211_sub_if_data *sdata; |
3b79af97 | 482 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2eb0ee6 JB |
483 | |
484 | rcu_read_lock(); | |
485 | sdata = ieee80211_sdata_from_skb(local, skb); | |
3b79af97 JB |
486 | if (sdata) { |
487 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
488 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
489 | cfg80211_probe_status(sdata->dev, hdr->addr1, | |
a78b26ff VN |
490 | cookie, acked, |
491 | info->status.ack_signal, | |
492 | info->status.is_valid_ack_signal, | |
3b79af97 JB |
493 | GFP_ATOMIC); |
494 | else | |
495 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, | |
496 | skb->data, skb->len, | |
497 | acked, GFP_ATOMIC); | |
498 | } | |
b2eb0ee6 JB |
499 | rcu_read_unlock(); |
500 | ||
8682250b AO |
501 | dev_kfree_skb_any(skb); |
502 | } else if (dropped) { | |
b2eb0ee6 JB |
503 | dev_kfree_skb_any(skb); |
504 | } else { | |
505 | /* consumes skb */ | |
506 | skb_complete_wifi_ack(skb, acked); | |
507 | } | |
508 | } | |
509 | ||
8a2fbedc JB |
510 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
511 | struct sk_buff *skb, bool dropped) | |
512 | { | |
513 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
514 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
515 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
516 | ||
517 | if (dropped) | |
518 | acked = false; | |
519 | ||
3b79af97 | 520 | if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
b2eb0ee6 | 521 | struct ieee80211_sub_if_data *sdata; |
8a2fbedc JB |
522 | |
523 | rcu_read_lock(); | |
524 | ||
b2eb0ee6 | 525 | sdata = ieee80211_sdata_from_skb(local, skb); |
8a2fbedc | 526 | |
1672c0e3 | 527 | if (!sdata) { |
8a2fbedc | 528 | skb->dev = NULL; |
75dbf00b | 529 | } else { |
1277b4a9 LK |
530 | unsigned int hdr_size = |
531 | ieee80211_hdrlen(hdr->frame_control); | |
532 | ||
533 | /* Check to see if packet is a TDLS teardown packet */ | |
534 | if (ieee80211_is_data(hdr->frame_control) && | |
535 | (ieee80211_get_tdls_action(skb, hdr_size) == | |
536 | WLAN_TDLS_TEARDOWN)) | |
537 | ieee80211_tdls_td_tx_handle(local, sdata, skb, | |
538 | info->flags); | |
539 | else | |
540 | ieee80211_mgd_conn_tx_status(sdata, | |
541 | hdr->frame_control, | |
542 | acked); | |
8a2fbedc JB |
543 | } |
544 | ||
545 | rcu_read_unlock(); | |
b2eb0ee6 JB |
546 | } else if (info->ack_frame_id) { |
547 | ieee80211_report_ack_skb(local, info, acked, dropped); | |
8a2fbedc | 548 | } |
2cc6f5a7 JB |
549 | |
550 | if (!dropped && skb->destructor) { | |
551 | skb->wifi_acked_valid = 1; | |
552 | skb->wifi_acked = acked; | |
553 | } | |
5d473fed BA |
554 | |
555 | ieee80211_led_tx(local); | |
34b1e0e9 SS |
556 | |
557 | if (skb_has_frag_list(skb)) { | |
558 | kfree_skb_list(skb_shinfo(skb)->frag_list); | |
559 | skb_shinfo(skb)->frag_list = NULL; | |
560 | } | |
8a2fbedc JB |
561 | } |
562 | ||
99ba2a14 JB |
563 | /* |
564 | * Use a static threshold for now, best value to be determined | |
565 | * by testing ... | |
566 | * Should it depend on: | |
567 | * - on # of retransmissions | |
568 | * - current throughput (higher value for higher tpt)? | |
569 | */ | |
570 | #define STA_LOST_PKT_THRESHOLD 50 | |
9d58f25b LK |
571 | #define STA_LOST_TDLS_PKT_THRESHOLD 10 |
572 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ | |
99ba2a14 | 573 | |
ad9dda63 FF |
574 | static void ieee80211_lost_packet(struct sta_info *sta, |
575 | struct ieee80211_tx_info *info) | |
abd43a6a | 576 | { |
e8a24cd4 RM |
577 | /* If driver relies on its own algorithm for station kickout, skip |
578 | * mac80211 packet loss mechanism. | |
579 | */ | |
580 | if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) | |
581 | return; | |
582 | ||
abd43a6a FF |
583 | /* This packet was aggregated but doesn't carry status info */ |
584 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
585 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
586 | return; | |
587 | ||
e5a9f8d0 JB |
588 | sta->status_stats.lost_packets++; |
589 | if (!sta->sta.tdls && | |
590 | sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) | |
9d58f25b LK |
591 | return; |
592 | ||
593 | /* | |
594 | * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD | |
595 | * of the last packets were lost, and that no ACK was received in the | |
596 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss | |
597 | * mechanism. | |
598 | */ | |
599 | if (sta->sta.tdls && | |
e5a9f8d0 | 600 | (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || |
9d58f25b | 601 | time_before(jiffies, |
e5a9f8d0 JB |
602 | sta->status_stats.last_tdls_pkt_time + |
603 | STA_LOST_TDLS_PKT_TIME))) | |
abd43a6a FF |
604 | return; |
605 | ||
606 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
e5a9f8d0 JB |
607 | sta->status_stats.lost_packets, GFP_ATOMIC); |
608 | sta->status_stats.lost_packets = 0; | |
abd43a6a FF |
609 | } |
610 | ||
7e1cdcbb FF |
611 | static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, |
612 | struct ieee80211_tx_info *info, | |
613 | int *retry_count) | |
fe7a5d5c | 614 | { |
0c869808 | 615 | int rates_idx = -1; |
7e1cdcbb FF |
616 | int count = -1; |
617 | int i; | |
fe7a5d5c JB |
618 | |
619 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
620 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
621 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
622 | /* just the first aggr frame carry status info */ | |
623 | info->status.rates[i].idx = -1; | |
624 | info->status.rates[i].count = 0; | |
625 | break; | |
626 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
627 | break; |
628 | } else if (i >= hw->max_report_rates) { | |
629 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
630 | info->status.rates[i].idx = -1; |
631 | info->status.rates[i].count = 0; | |
be7974aa | 632 | break; |
fe7a5d5c JB |
633 | } |
634 | ||
7e1cdcbb | 635 | count += info->status.rates[i].count; |
fe7a5d5c | 636 | } |
be7974aa HS |
637 | rates_idx = i - 1; |
638 | ||
7e1cdcbb FF |
639 | if (count < 0) |
640 | count = 0; | |
641 | ||
642 | *retry_count = count; | |
643 | return rates_idx; | |
644 | } | |
645 | ||
4dc792b8 HS |
646 | void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, |
647 | struct ieee80211_supported_band *sband, | |
648 | int retry_count, int shift, bool send_to_cooked) | |
7e1cdcbb FF |
649 | { |
650 | struct sk_buff *skb2; | |
4dc792b8 HS |
651 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
652 | struct ieee80211_sub_if_data *sdata; | |
653 | struct net_device *prev_dev = NULL; | |
654 | int rtap_len; | |
655 | ||
656 | /* send frame to monitor interfaces now */ | |
657 | rtap_len = ieee80211_tx_radiotap_len(info); | |
658 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
659 | pr_err("ieee80211_tx_status: headroom too small\n"); | |
660 | dev_kfree_skb(skb); | |
661 | return; | |
662 | } | |
663 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, | |
664 | rtap_len, shift); | |
665 | ||
666 | /* XXX: is this sufficient for BPF? */ | |
d57a544d | 667 | skb_reset_mac_header(skb); |
4dc792b8 HS |
668 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
669 | skb->pkt_type = PACKET_OTHERHOST; | |
670 | skb->protocol = htons(ETH_P_802_2); | |
671 | memset(skb->cb, 0, sizeof(skb->cb)); | |
672 | ||
673 | rcu_read_lock(); | |
674 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
675 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
676 | if (!ieee80211_sdata_running(sdata)) | |
677 | continue; | |
678 | ||
d8212184 | 679 | if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && |
4dc792b8 HS |
680 | !send_to_cooked) |
681 | continue; | |
682 | ||
683 | if (prev_dev) { | |
684 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
685 | if (skb2) { | |
686 | skb2->dev = prev_dev; | |
687 | netif_rx(skb2); | |
688 | } | |
689 | } | |
690 | ||
691 | prev_dev = sdata->dev; | |
692 | } | |
693 | } | |
694 | if (prev_dev) { | |
695 | skb->dev = prev_dev; | |
696 | netif_rx(skb); | |
697 | skb = NULL; | |
698 | } | |
699 | rcu_read_unlock(); | |
700 | dev_kfree_skb(skb); | |
701 | } | |
702 | ||
5fe49a9d FF |
703 | static void __ieee80211_tx_status(struct ieee80211_hw *hw, |
704 | struct ieee80211_tx_status *status) | |
4dc792b8 | 705 | { |
5fe49a9d | 706 | struct sk_buff *skb = status->skb; |
7e1cdcbb FF |
707 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
708 | struct ieee80211_local *local = hw_to_local(hw); | |
5fe49a9d FF |
709 | struct ieee80211_tx_info *info = status->info; |
710 | struct sta_info *sta; | |
7e1cdcbb FF |
711 | __le16 fc; |
712 | struct ieee80211_supported_band *sband; | |
7e1cdcbb FF |
713 | int retry_count; |
714 | int rates_idx; | |
715 | bool send_to_cooked; | |
716 | bool acked; | |
717 | struct ieee80211_bar *bar; | |
7e1cdcbb | 718 | int shift = 0; |
5e06a9e8 | 719 | int tid = IEEE80211_NUM_TIDS; |
7e1cdcbb FF |
720 | |
721 | rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); | |
fe7a5d5c | 722 | |
fe7a5d5c | 723 | sband = local->hw.wiphy->bands[info->band]; |
375177bf | 724 | fc = hdr->frame_control; |
fe7a5d5c | 725 | |
5fe49a9d FF |
726 | if (status->sta) { |
727 | sta = container_of(status->sta, struct sta_info, sta); | |
2103dec1 SW |
728 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
729 | ||
47086fc5 | 730 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 731 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 732 | |
04ac3c0e | 733 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
71f2c347 MH |
734 | |
735 | /* mesh Peer Service Period support */ | |
736 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
737 | ieee80211_is_data_qos(fc)) | |
738 | ieee80211_mpsp_trigger_process( | |
739 | ieee80211_get_qos_ctl(hdr), sta, true, acked); | |
740 | ||
c2c98fde | 741 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
742 | /* |
743 | * The STA is in power save mode, so assume | |
744 | * that this TX packet failed because of that. | |
745 | */ | |
746 | ieee80211_handle_filtered_frame(local, sta, skb); | |
fe7a5d5c JB |
747 | return; |
748 | } | |
749 | ||
30686bf7 | 750 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && |
00a9a6d1 | 751 | (ieee80211_is_data(hdr->frame_control)) && |
0c869808 | 752 | (rates_idx != -1)) |
e5a9f8d0 JB |
753 | sta->tx_stats.last_rate = |
754 | info->status.rates[rates_idx]; | |
0c869808 | 755 | |
fe7a5d5c JB |
756 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
757 | (ieee80211_is_data_qos(fc))) { | |
79c892b8 | 758 | u16 ssn; |
fe7a5d5c JB |
759 | u8 *qc; |
760 | ||
761 | qc = ieee80211_get_qos_ctl(hdr); | |
762 | tid = qc[0] & 0xf; | |
763 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
764 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 765 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c | 766 | tid, ssn); |
79c892b8 JB |
767 | } else if (ieee80211_is_data_qos(fc)) { |
768 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
769 | ||
770 | tid = qc[0] & 0xf; | |
fe7a5d5c JB |
771 | } |
772 | ||
e69deded | 773 | if (!acked && ieee80211_is_back_req(fc)) { |
79c892b8 | 774 | u16 control; |
7107676a | 775 | |
e69deded | 776 | /* |
7107676a FF |
777 | * BAR failed, store the last SSN and retry sending |
778 | * the BAR when the next unicast transmission on the | |
779 | * same TID succeeds. | |
e69deded HS |
780 | */ |
781 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
782 | control = le16_to_cpu(bar->control); |
783 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
784 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
785 | ||
7107676a | 786 | tid = (control & |
e69deded HS |
787 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
788 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 789 | |
8df6b7b1 | 790 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
791 | } |
792 | } | |
793 | ||
fe7a5d5c JB |
794 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
795 | ieee80211_handle_filtered_frame(local, sta, skb); | |
fe7a5d5c JB |
796 | return; |
797 | } else { | |
04ac3c0e | 798 | if (!acked) |
e5a9f8d0 JB |
799 | sta->status_stats.retry_failed++; |
800 | sta->status_stats.retry_count += retry_count; | |
79c892b8 JB |
801 | |
802 | if (ieee80211_is_data_present(fc)) { | |
803 | if (!acked) | |
e5a9f8d0 JB |
804 | sta->status_stats.msdu_failed[tid]++; |
805 | ||
806 | sta->status_stats.msdu_retries[tid] += | |
807 | retry_count; | |
79c892b8 | 808 | } |
fe7a5d5c JB |
809 | } |
810 | ||
5fe49a9d | 811 | rate_control_tx_status(local, sband, status); |
fe7a5d5c | 812 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
c4205510 | 813 | ieee80211s_update_metric(local, sta, status); |
0f78231b | 814 | |
04ac3c0e | 815 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 816 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 817 | |
04ac3c0e | 818 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
30686bf7 | 819 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
02219b3a JB |
820 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, |
821 | acked, info->status.tx_time); | |
04ac3c0e | 822 | |
b4809e94 THJ |
823 | if (info->status.tx_time && |
824 | wiphy_ext_feature_isset(local->hw.wiphy, | |
825 | NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) | |
826 | ieee80211_sta_register_airtime(&sta->sta, tid, | |
827 | info->status.tx_time, 0); | |
828 | ||
30686bf7 | 829 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
99ba2a14 | 830 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
e5a9f8d0 JB |
831 | if (sta->status_stats.lost_packets) |
832 | sta->status_stats.lost_packets = 0; | |
9d58f25b LK |
833 | |
834 | /* Track when last TDLS packet was ACKed */ | |
835 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
e5a9f8d0 JB |
836 | sta->status_stats.last_tdls_pkt_time = |
837 | jiffies; | |
abd43a6a | 838 | } else { |
ad9dda63 | 839 | ieee80211_lost_packet(sta, info); |
99ba2a14 JB |
840 | } |
841 | } | |
fe7a5d5c JB |
842 | } |
843 | ||
fe7a5d5c JB |
844 | /* SNMP counters |
845 | * Fragments are passed to low-level drivers as separate skbs, so these | |
846 | * are actually fragments, not frames. Update frame counters only for | |
847 | * the first fragment of the frame. */ | |
5cf16616 SM |
848 | if ((info->flags & IEEE80211_TX_STAT_ACK) || |
849 | (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { | |
adf5ace5 | 850 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
c206ca67 | 851 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
85b89af0 | 852 | if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
c206ca67 | 853 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
fe7a5d5c | 854 | if (retry_count > 0) |
c206ca67 | 855 | I802_DEBUG_INC(local->dot11RetryCount); |
fe7a5d5c | 856 | if (retry_count > 1) |
c206ca67 | 857 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
fe7a5d5c JB |
858 | } |
859 | ||
860 | /* This counter shall be incremented for an acknowledged MPDU | |
861 | * with an individual address in the address 1 field or an MPDU | |
862 | * with a multicast address in the address 1 field of type Data | |
863 | * or Management. */ | |
864 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
865 | ieee80211_is_data(fc) || |
866 | ieee80211_is_mgmt(fc)) | |
c206ca67 | 867 | I802_DEBUG_INC(local->dot11TransmittedFragmentCount); |
fe7a5d5c | 868 | } else { |
adf5ace5 | 869 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
c206ca67 | 870 | I802_DEBUG_INC(local->dot11FailedCount); |
fe7a5d5c JB |
871 | } |
872 | ||
375177bf | 873 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
30686bf7 | 874 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
375177bf VN |
875 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
876 | local->ps_sdata && !(local->scanning)) { | |
877 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
878 | local->ps_sdata->u.mgd.flags |= | |
879 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
880 | } else |
881 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
882 | msecs_to_jiffies(10)); | |
883 | } | |
884 | ||
8a2fbedc | 885 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 886 | |
fe7a5d5c JB |
887 | /* this was a transmitted frame, but now we want to reuse it */ |
888 | skb_orphan(skb); | |
889 | ||
eaf55530 FF |
890 | /* Need to make a copy before skb->cb gets cleared */ |
891 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 892 | !(ieee80211_is_data(fc)); |
eaf55530 | 893 | |
fe7a5d5c JB |
894 | /* |
895 | * This is a bit racy but we can avoid a lot of work | |
896 | * with this test... | |
897 | */ | |
eaf55530 | 898 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
899 | dev_kfree_skb(skb); |
900 | return; | |
901 | } | |
902 | ||
4dc792b8 HS |
903 | /* send to monitor interfaces */ |
904 | ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked); | |
fe7a5d5c | 905 | } |
5fe49a9d FF |
906 | |
907 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) | |
908 | { | |
909 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
910 | struct ieee80211_local *local = hw_to_local(hw); | |
911 | struct ieee80211_tx_status status = { | |
912 | .skb = skb, | |
913 | .info = IEEE80211_SKB_CB(skb), | |
914 | }; | |
915 | struct rhlist_head *tmp; | |
916 | struct sta_info *sta; | |
917 | ||
918 | rcu_read_lock(); | |
919 | ||
920 | for_each_sta_info(local, hdr->addr1, sta, tmp) { | |
921 | /* skip wrong virtual interface */ | |
922 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) | |
923 | continue; | |
924 | ||
925 | status.sta = &sta->sta; | |
926 | break; | |
927 | } | |
928 | ||
929 | __ieee80211_tx_status(hw, &status); | |
930 | rcu_read_unlock(); | |
931 | } | |
fe7a5d5c | 932 | EXPORT_SYMBOL(ieee80211_tx_status); |
8178d38b | 933 | |
5fe49a9d FF |
934 | void ieee80211_tx_status_ext(struct ieee80211_hw *hw, |
935 | struct ieee80211_tx_status *status) | |
eefebd31 FF |
936 | { |
937 | struct ieee80211_local *local = hw_to_local(hw); | |
5fe49a9d FF |
938 | struct ieee80211_tx_info *info = status->info; |
939 | struct ieee80211_sta *pubsta = status->sta; | |
eefebd31 | 940 | struct ieee80211_supported_band *sband; |
eefebd31 FF |
941 | int retry_count; |
942 | bool acked, noack_success; | |
943 | ||
5fe49a9d FF |
944 | if (status->skb) |
945 | return __ieee80211_tx_status(hw, status); | |
946 | ||
947 | if (!status->sta) | |
948 | return; | |
949 | ||
eefebd31 FF |
950 | ieee80211_tx_get_rates(hw, info, &retry_count); |
951 | ||
952 | sband = hw->wiphy->bands[info->band]; | |
953 | ||
954 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
955 | noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); | |
956 | ||
957 | if (pubsta) { | |
958 | struct sta_info *sta; | |
959 | ||
960 | sta = container_of(pubsta, struct sta_info, sta); | |
961 | ||
962 | if (!acked) | |
963 | sta->status_stats.retry_failed++; | |
964 | sta->status_stats.retry_count += retry_count; | |
965 | ||
966 | if (acked) { | |
967 | sta->status_stats.last_ack = jiffies; | |
968 | ||
969 | if (sta->status_stats.lost_packets) | |
970 | sta->status_stats.lost_packets = 0; | |
971 | ||
972 | /* Track when last TDLS packet was ACKed */ | |
973 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
974 | sta->status_stats.last_tdls_pkt_time = jiffies; | |
a317e65f FF |
975 | } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
976 | return; | |
eefebd31 FF |
977 | } else { |
978 | ieee80211_lost_packet(sta, info); | |
979 | } | |
980 | ||
5fe49a9d | 981 | rate_control_tx_status(local, sband, status); |
c4205510 YCP |
982 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
983 | ieee80211s_update_metric(local, sta, status); | |
eefebd31 FF |
984 | } |
985 | ||
986 | if (acked || noack_success) { | |
987 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); | |
988 | if (!pubsta) | |
989 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); | |
990 | if (retry_count > 0) | |
991 | I802_DEBUG_INC(local->dot11RetryCount); | |
992 | if (retry_count > 1) | |
993 | I802_DEBUG_INC(local->dot11MultipleRetryCount); | |
994 | } else { | |
995 | I802_DEBUG_INC(local->dot11FailedCount); | |
996 | } | |
997 | } | |
5fe49a9d | 998 | EXPORT_SYMBOL(ieee80211_tx_status_ext); |
eefebd31 | 999 | |
f8252e7b AK |
1000 | void ieee80211_tx_rate_update(struct ieee80211_hw *hw, |
1001 | struct ieee80211_sta *pubsta, | |
1002 | struct ieee80211_tx_info *info) | |
1003 | { | |
1004 | struct ieee80211_local *local = hw_to_local(hw); | |
1005 | struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; | |
1006 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1007 | struct ieee80211_tx_status status = { | |
1008 | .info = info, | |
1009 | .sta = pubsta, | |
1010 | }; | |
1011 | ||
1012 | rate_control_tx_status(local, sband, &status); | |
1013 | ||
1014 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) | |
1015 | sta->tx_stats.last_rate = info->status.rates[0]; | |
1016 | } | |
1017 | EXPORT_SYMBOL(ieee80211_tx_rate_update); | |
1018 | ||
8178d38b AN |
1019 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
1020 | { | |
1021 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1022 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
1023 | num_packets, GFP_ATOMIC); | |
1024 | } | |
1025 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
1026 | |
1027 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
1028 | { | |
a729cff8 | 1029 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 1030 | |
8a2fbedc | 1031 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
1032 | dev_kfree_skb_any(skb); |
1033 | } | |
1034 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
1035 | |
1036 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
1037 | struct sk_buff_head *skbs) | |
1038 | { | |
1039 | struct sk_buff *skb; | |
1040 | ||
1041 | while ((skb = __skb_dequeue(skbs))) | |
1042 | ieee80211_free_txskb(hw, skb); | |
1043 | } |