Commit | Line | Data |
---|---|---|
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> |
fe7a5d5c JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
bc3b2d7f | 12 | #include <linux/export.h> |
888d04df | 13 | #include <linux/etherdevice.h> |
fe7a5d5c | 14 | #include <net/mac80211.h> |
d26ad377 | 15 | #include <asm/unaligned.h> |
fe7a5d5c JB |
16 | #include "ieee80211_i.h" |
17 | #include "rate.h" | |
18 | #include "mesh.h" | |
19 | #include "led.h" | |
948d887d | 20 | #include "wme.h" |
fe7a5d5c JB |
21 | |
22 | ||
23 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
24 | struct sk_buff *skb) | |
25 | { | |
26 | struct ieee80211_local *local = hw_to_local(hw); | |
27 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
28 | int tmp; | |
29 | ||
30 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
31 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? | |
32 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
33 | tmp = skb_queue_len(&local->skb_queue) + | |
34 | skb_queue_len(&local->skb_queue_unreliable); | |
35 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
36 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
c3e7724b | 37 | ieee80211_free_txskb(hw, skb); |
fe7a5d5c JB |
38 | tmp--; |
39 | I802_DEBUG_INC(local->tx_status_drop); | |
40 | } | |
41 | tasklet_schedule(&local->tasklet); | |
42 | } | |
43 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
44 | ||
45 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, | |
46 | struct sta_info *sta, | |
47 | struct sk_buff *skb) | |
48 | { | |
49 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
948d887d JB |
50 | struct ieee80211_hdr *hdr = (void *)skb->data; |
51 | int ac; | |
fe7a5d5c | 52 | |
697e6a0f JB |
53 | /* |
54 | * This skb 'survived' a round-trip through the driver, and | |
55 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 56 | * we can definitely not rely on the control information |
c6fcf6bc JB |
57 | * being correct. Clear it so we don't get junk there, and |
58 | * indicate that it needs new processing, but must not be | |
59 | * modified/encrypted again. | |
697e6a0f JB |
60 | */ |
61 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
62 | |
63 | info->control.jiffies = jiffies; | |
64 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
65 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
66 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 67 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 68 | |
fe7a5d5c JB |
69 | sta->tx_filtered_count++; |
70 | ||
8a8656fa JB |
71 | /* |
72 | * Clear more-data bit on filtered frames, it might be set | |
73 | * but later frames might time out so it might have to be | |
74 | * clear again ... It's all rather unlikely (this frame | |
75 | * should time out first, right?) but let's not confuse | |
76 | * peers unnecessarily. | |
77 | */ | |
78 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
79 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
80 | ||
948d887d | 81 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
82 | u8 *p = ieee80211_get_qos_ctl(hdr); |
83 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
84 | ||
85 | /* | |
86 | * Clear EOSP if set, this could happen e.g. | |
87 | * if an absence period (us being a P2P GO) | |
88 | * shortens the SP. | |
89 | */ | |
90 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
91 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
948d887d JB |
92 | ac = ieee802_1d_to_ac[tid & 7]; |
93 | } else { | |
94 | ac = IEEE80211_AC_BE; | |
95 | } | |
96 | ||
fe7a5d5c JB |
97 | /* |
98 | * Clear the TX filter mask for this STA when sending the next | |
99 | * packet. If the STA went to power save mode, this will happen | |
100 | * when it wakes up for the next time. | |
101 | */ | |
c2c98fde | 102 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
fe7a5d5c JB |
103 | |
104 | /* | |
105 | * This code races in the following way: | |
106 | * | |
107 | * (1) STA sends frame indicating it will go to sleep and does so | |
108 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
109 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
110 | * (4) we get TX status before having processed the frame and | |
111 | * knowing that the STA has gone to sleep. | |
112 | * | |
113 | * This is actually quite unlikely even when both those events are | |
114 | * processed from interrupts coming in quickly after one another or | |
115 | * even at the same time because we queue both TX status events and | |
116 | * RX frames to be processed by a tasklet and process them in the | |
117 | * same order that they were received or TX status last. Hence, there | |
118 | * is no race as long as the frame RX is processed before the next TX | |
119 | * status, which drivers can ensure, see below. | |
120 | * | |
121 | * Note that this can only happen if the hardware or firmware can | |
122 | * actually add STAs to the filter list, if this is done by the | |
123 | * driver in response to set_tim() (which will only reduce the race | |
124 | * this whole filtering tries to solve, not completely solve it) | |
125 | * this situation cannot happen. | |
126 | * | |
127 | * To completely solve this race drivers need to make sure that they | |
128 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
129 | * functions and | |
130 | * (b) always process RX events before TX status events if ordering | |
131 | * can be unknown, for example with different interrupt status | |
132 | * bits. | |
d057e5a3 AN |
133 | * (c) if PS mode transitions are manual (i.e. the flag |
134 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
135 | * changes before calling TX status events if ordering can be | |
136 | * unknown. | |
fe7a5d5c | 137 | */ |
c2c98fde | 138 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
948d887d JB |
139 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
140 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 141 | sta_info_recalc_tim(sta); |
60750397 JB |
142 | |
143 | if (!timer_pending(&local->sta_cleanup)) | |
144 | mod_timer(&local->sta_cleanup, | |
145 | round_jiffies(jiffies + | |
146 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
147 | return; |
148 | } | |
149 | ||
c2c98fde | 150 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
fe7a5d5c JB |
151 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
152 | /* Software retry the packet once */ | |
153 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
154 | ieee80211_add_pending_skb(local, skb); | |
155 | return; | |
156 | } | |
157 | ||
bdcbd8e0 JB |
158 | ps_dbg_ratelimited(sta->sdata, |
159 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
160 | skb_queue_len(&sta->tx_filtered[ac]), | |
161 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); | |
c3e7724b | 162 | ieee80211_free_txskb(&local->hw, skb); |
fe7a5d5c JB |
163 | } |
164 | ||
f0425bed FF |
165 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
166 | { | |
167 | struct tid_ampdu_tx *tid_tx; | |
168 | ||
169 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
170 | if (!tid_tx || !tid_tx->bar_pending) | |
171 | return; | |
172 | ||
173 | tid_tx->bar_pending = false; | |
8c771244 | 174 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
175 | } |
176 | ||
0f78231b JB |
177 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
178 | { | |
179 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
180 | struct ieee80211_local *local = sta->local; | |
181 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
182 | ||
31da12ce FF |
183 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
184 | sta->last_rx = jiffies; | |
185 | ||
f0425bed FF |
186 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
187 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
188 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
189 | u16 tid = qc[0] & 0xf; | |
190 | ||
191 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
192 | } | |
193 | ||
0f78231b | 194 | if (ieee80211_is_action(mgmt->frame_control) && |
0f78231b | 195 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 JB |
196 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
197 | sdata->vif.type == NL80211_IFTYPE_STATION && | |
198 | ieee80211_sdata_running(sdata)) { | |
0f78231b JB |
199 | /* |
200 | * This update looks racy, but isn't -- if we come | |
201 | * here we've definitely got a station that we're | |
202 | * talking to, and on a managed interface that can | |
203 | * only be the AP. And the only other place updating | |
04ecd257 | 204 | * this variable in managed mode is before association. |
0f78231b JB |
205 | */ |
206 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
207 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
04ecd257 | 208 | sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
209 | break; |
210 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
04ecd257 | 211 | sdata->smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
212 | break; |
213 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
214 | default: /* shouldn't happen since we don't send that */ | |
04ecd257 | 215 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
216 | break; |
217 | } | |
218 | ||
04ecd257 | 219 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); |
0f78231b JB |
220 | } |
221 | } | |
222 | ||
f0425bed FF |
223 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
224 | { | |
225 | struct tid_ampdu_tx *tid_tx; | |
226 | ||
227 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
228 | if (!tid_tx) | |
229 | return; | |
230 | ||
231 | tid_tx->failed_bar_ssn = ssn; | |
232 | tid_tx->bar_pending = true; | |
233 | } | |
234 | ||
a2fe8166 HS |
235 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
236 | { | |
237 | int len = sizeof(struct ieee80211_radiotap_header); | |
238 | ||
239 | /* IEEE80211_RADIOTAP_RATE rate */ | |
240 | if (info->status.rates[0].idx >= 0 && | |
241 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
242 | len += 2; | |
243 | ||
244 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
245 | len += 2; | |
246 | ||
247 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
248 | len += 1; | |
249 | ||
7f2a5e21 HS |
250 | /* IEEE80211_TX_RC_MCS */ |
251 | if (info->status.rates[0].idx >= 0 && | |
252 | info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
253 | len += 3; | |
254 | ||
a2fe8166 HS |
255 | return len; |
256 | } | |
257 | ||
258 | static void ieee80211_add_tx_radiotap_header(struct ieee80211_supported_band | |
259 | *sband, struct sk_buff *skb, | |
260 | int retry_count, int rtap_len) | |
261 | { | |
262 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
263 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
264 | struct ieee80211_radiotap_header *rthdr; | |
265 | unsigned char *pos; | |
9c8f2c42 | 266 | u16 txflags; |
a2fe8166 HS |
267 | |
268 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); | |
269 | ||
270 | memset(rthdr, 0, rtap_len); | |
271 | rthdr->it_len = cpu_to_le16(rtap_len); | |
272 | rthdr->it_present = | |
273 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
274 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
275 | pos = (unsigned char *)(rthdr + 1); | |
276 | ||
277 | /* | |
278 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
279 | * extensions proposal contains, we can actually report | |
280 | * the whole set of tries we did. | |
281 | */ | |
282 | ||
283 | /* IEEE80211_RADIOTAP_RATE */ | |
284 | if (info->status.rates[0].idx >= 0 && | |
285 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
286 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); | |
287 | *pos = sband->bitrates[info->status.rates[0].idx].bitrate / 5; | |
288 | /* padding for tx flags */ | |
289 | pos += 2; | |
290 | } | |
291 | ||
292 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
293 | txflags = 0; | |
294 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
295 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 296 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 HS |
297 | |
298 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
299 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
9c8f2c42 | 300 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
a2fe8166 | 301 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 302 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
303 | |
304 | put_unaligned_le16(txflags, pos); | |
305 | pos += 2; | |
306 | ||
307 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
308 | /* for now report the total retry_count */ | |
309 | *pos = retry_count; | |
310 | pos++; | |
7f2a5e21 HS |
311 | |
312 | /* IEEE80211_TX_RC_MCS */ | |
313 | if (info->status.rates[0].idx >= 0 && | |
314 | info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
315 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); | |
316 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
317 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
318 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
319 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
320 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
321 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
322 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
323 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
324 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
325 | pos[2] = info->status.rates[0].idx; | |
326 | pos += 3; | |
327 | } | |
328 | ||
a2fe8166 HS |
329 | } |
330 | ||
8a2fbedc JB |
331 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
332 | struct sk_buff *skb, bool dropped) | |
333 | { | |
334 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
335 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
336 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
337 | ||
338 | if (dropped) | |
339 | acked = false; | |
340 | ||
1672c0e3 JB |
341 | if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
342 | IEEE80211_TX_INTFL_MLME_CONN_TX)) { | |
8a2fbedc JB |
343 | struct ieee80211_sub_if_data *sdata = NULL; |
344 | struct ieee80211_sub_if_data *iter_sdata; | |
345 | u64 cookie = (unsigned long)skb; | |
346 | ||
347 | rcu_read_lock(); | |
348 | ||
349 | if (skb->dev) { | |
350 | list_for_each_entry_rcu(iter_sdata, &local->interfaces, | |
351 | list) { | |
352 | if (!iter_sdata->dev) | |
353 | continue; | |
354 | ||
355 | if (skb->dev == iter_sdata->dev) { | |
356 | sdata = iter_sdata; | |
357 | break; | |
358 | } | |
359 | } | |
360 | } else { | |
361 | sdata = rcu_dereference(local->p2p_sdata); | |
362 | } | |
363 | ||
1672c0e3 | 364 | if (!sdata) { |
8a2fbedc | 365 | skb->dev = NULL; |
1672c0e3 JB |
366 | } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
367 | ieee80211_mgd_conn_tx_status(sdata, hdr->frame_control, | |
368 | acked); | |
369 | } else if (ieee80211_is_nullfunc(hdr->frame_control) || | |
370 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
8a2fbedc JB |
371 | cfg80211_probe_status(sdata->dev, hdr->addr1, |
372 | cookie, acked, GFP_ATOMIC); | |
373 | } else { | |
374 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data, | |
375 | skb->len, acked, GFP_ATOMIC); | |
376 | } | |
377 | ||
378 | rcu_read_unlock(); | |
379 | } | |
380 | ||
381 | if (unlikely(info->ack_frame_id)) { | |
382 | struct sk_buff *ack_skb; | |
383 | unsigned long flags; | |
384 | ||
385 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
386 | ack_skb = idr_find(&local->ack_status_frames, | |
387 | info->ack_frame_id); | |
388 | if (ack_skb) | |
389 | idr_remove(&local->ack_status_frames, | |
390 | info->ack_frame_id); | |
391 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
392 | ||
393 | if (ack_skb) { | |
394 | if (!dropped) { | |
395 | /* consumes ack_skb */ | |
396 | skb_complete_wifi_ack(ack_skb, acked); | |
397 | } else { | |
398 | dev_kfree_skb_any(ack_skb); | |
399 | } | |
400 | } | |
401 | } | |
402 | } | |
403 | ||
99ba2a14 JB |
404 | /* |
405 | * Use a static threshold for now, best value to be determined | |
406 | * by testing ... | |
407 | * Should it depend on: | |
408 | * - on # of retransmissions | |
409 | * - current throughput (higher value for higher tpt)? | |
410 | */ | |
411 | #define STA_LOST_PKT_THRESHOLD 50 | |
412 | ||
fe7a5d5c JB |
413 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
414 | { | |
415 | struct sk_buff *skb2; | |
416 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
417 | struct ieee80211_local *local = hw_to_local(hw); | |
418 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
fe7a5d5c JB |
419 | __le16 fc; |
420 | struct ieee80211_supported_band *sband; | |
fe7a5d5c JB |
421 | struct ieee80211_sub_if_data *sdata; |
422 | struct net_device *prev_dev = NULL; | |
abe60632 | 423 | struct sta_info *sta, *tmp; |
fe7a5d5c | 424 | int retry_count = -1, i; |
0c869808 | 425 | int rates_idx = -1; |
eaf55530 | 426 | bool send_to_cooked; |
04ac3c0e | 427 | bool acked; |
e69deded | 428 | struct ieee80211_bar *bar; |
a2fe8166 | 429 | int rtap_len; |
fe7a5d5c JB |
430 | |
431 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
432 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
433 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
434 | /* just the first aggr frame carry status info */ | |
435 | info->status.rates[i].idx = -1; | |
436 | info->status.rates[i].count = 0; | |
437 | break; | |
438 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
439 | break; |
440 | } else if (i >= hw->max_report_rates) { | |
441 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
442 | info->status.rates[i].idx = -1; |
443 | info->status.rates[i].count = 0; | |
be7974aa | 444 | break; |
fe7a5d5c JB |
445 | } |
446 | ||
447 | retry_count += info->status.rates[i].count; | |
448 | } | |
be7974aa HS |
449 | rates_idx = i - 1; |
450 | ||
fe7a5d5c JB |
451 | if (retry_count < 0) |
452 | retry_count = 0; | |
453 | ||
454 | rcu_read_lock(); | |
455 | ||
456 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 457 | fc = hdr->frame_control; |
fe7a5d5c | 458 | |
abe60632 JB |
459 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
460 | /* skip wrong virtual interface */ | |
b203ca39 | 461 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
abe60632 | 462 | continue; |
fe7a5d5c | 463 | |
47086fc5 | 464 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 465 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 466 | |
04ac3c0e | 467 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
c2c98fde | 468 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
469 | /* |
470 | * The STA is in power save mode, so assume | |
471 | * that this TX packet failed because of that. | |
472 | */ | |
473 | ieee80211_handle_filtered_frame(local, sta, skb); | |
474 | rcu_read_unlock(); | |
475 | return; | |
476 | } | |
477 | ||
3f52b7e3 MP |
478 | /* mesh Peer Service Period support */ |
479 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
480 | ieee80211_is_data_qos(fc)) | |
481 | ieee80211_mpsp_trigger_process( | |
482 | ieee80211_get_qos_ctl(hdr), | |
483 | sta, true, acked); | |
484 | ||
0c869808 JO |
485 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
486 | (rates_idx != -1)) | |
487 | sta->last_tx_rate = info->status.rates[rates_idx]; | |
488 | ||
fe7a5d5c JB |
489 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
490 | (ieee80211_is_data_qos(fc))) { | |
491 | u16 tid, ssn; | |
492 | u8 *qc; | |
493 | ||
494 | qc = ieee80211_get_qos_ctl(hdr); | |
495 | tid = qc[0] & 0xf; | |
496 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
497 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 498 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c JB |
499 | tid, ssn); |
500 | } | |
501 | ||
e69deded | 502 | if (!acked && ieee80211_is_back_req(fc)) { |
8e7c4e4d | 503 | u16 tid, control; |
7107676a | 504 | |
e69deded | 505 | /* |
7107676a FF |
506 | * BAR failed, store the last SSN and retry sending |
507 | * the BAR when the next unicast transmission on the | |
508 | * same TID succeeds. | |
e69deded HS |
509 | */ |
510 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
511 | control = le16_to_cpu(bar->control); |
512 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
513 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
514 | ||
7107676a | 515 | tid = (control & |
e69deded HS |
516 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
517 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 518 | |
8df6b7b1 | 519 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
520 | } |
521 | } | |
522 | ||
fe7a5d5c JB |
523 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
524 | ieee80211_handle_filtered_frame(local, sta, skb); | |
525 | rcu_read_unlock(); | |
526 | return; | |
527 | } else { | |
04ac3c0e | 528 | if (!acked) |
fe7a5d5c JB |
529 | sta->tx_retry_failed++; |
530 | sta->tx_retry_count += retry_count; | |
531 | } | |
532 | ||
533 | rate_control_tx_status(local, sband, sta, skb); | |
534 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
535 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 536 | |
04ac3c0e | 537 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 538 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 539 | |
04ac3c0e FF |
540 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
541 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
542 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); | |
543 | ||
99ba2a14 JB |
544 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
545 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
546 | if (sta->lost_packets) | |
547 | sta->lost_packets = 0; | |
548 | } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { | |
549 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, | |
550 | sta->sta.addr, | |
551 | sta->lost_packets, | |
552 | GFP_ATOMIC); | |
553 | sta->lost_packets = 0; | |
554 | } | |
555 | } | |
db94357d S |
556 | |
557 | if (acked) | |
558 | sta->last_ack_signal = info->status.ack_signal; | |
fe7a5d5c JB |
559 | } |
560 | ||
561 | rcu_read_unlock(); | |
562 | ||
563 | ieee80211_led_tx(local, 0); | |
564 | ||
565 | /* SNMP counters | |
566 | * Fragments are passed to low-level drivers as separate skbs, so these | |
567 | * are actually fragments, not frames. Update frame counters only for | |
568 | * the first fragment of the frame. */ | |
fe7a5d5c | 569 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
adf5ace5 | 570 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
fe7a5d5c JB |
571 | local->dot11TransmittedFrameCount++; |
572 | if (is_multicast_ether_addr(hdr->addr1)) | |
573 | local->dot11MulticastTransmittedFrameCount++; | |
574 | if (retry_count > 0) | |
575 | local->dot11RetryCount++; | |
576 | if (retry_count > 1) | |
577 | local->dot11MultipleRetryCount++; | |
578 | } | |
579 | ||
580 | /* This counter shall be incremented for an acknowledged MPDU | |
581 | * with an individual address in the address 1 field or an MPDU | |
582 | * with a multicast address in the address 1 field of type Data | |
583 | * or Management. */ | |
584 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
585 | ieee80211_is_data(fc) || |
586 | ieee80211_is_mgmt(fc)) | |
fe7a5d5c JB |
587 | local->dot11TransmittedFragmentCount++; |
588 | } else { | |
adf5ace5 | 589 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
fe7a5d5c JB |
590 | local->dot11FailedCount++; |
591 | } | |
592 | ||
375177bf VN |
593 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
594 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && | |
595 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && | |
596 | local->ps_sdata && !(local->scanning)) { | |
597 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
598 | local->ps_sdata->u.mgd.flags |= | |
599 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
600 | } else |
601 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
602 | msecs_to_jiffies(10)); | |
603 | } | |
604 | ||
8a2fbedc | 605 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 606 | |
fe7a5d5c JB |
607 | /* this was a transmitted frame, but now we want to reuse it */ |
608 | skb_orphan(skb); | |
609 | ||
eaf55530 FF |
610 | /* Need to make a copy before skb->cb gets cleared */ |
611 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 612 | !(ieee80211_is_data(fc)); |
eaf55530 | 613 | |
fe7a5d5c JB |
614 | /* |
615 | * This is a bit racy but we can avoid a lot of work | |
616 | * with this test... | |
617 | */ | |
eaf55530 | 618 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
619 | dev_kfree_skb(skb); |
620 | return; | |
621 | } | |
622 | ||
623 | /* send frame to monitor interfaces now */ | |
a2fe8166 HS |
624 | rtap_len = ieee80211_tx_radiotap_len(info); |
625 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
f0d23208 | 626 | pr_err("ieee80211_tx_status: headroom too small\n"); |
fe7a5d5c JB |
627 | dev_kfree_skb(skb); |
628 | return; | |
629 | } | |
a2fe8166 | 630 | ieee80211_add_tx_radiotap_header(sband, skb, retry_count, rtap_len); |
fe7a5d5c JB |
631 | |
632 | /* XXX: is this sufficient for BPF? */ | |
633 | skb_set_mac_header(skb, 0); | |
634 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
635 | skb->pkt_type = PACKET_OTHERHOST; | |
636 | skb->protocol = htons(ETH_P_802_2); | |
637 | memset(skb->cb, 0, sizeof(skb->cb)); | |
638 | ||
639 | rcu_read_lock(); | |
640 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
641 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
9607e6b6 | 642 | if (!ieee80211_sdata_running(sdata)) |
fe7a5d5c JB |
643 | continue; |
644 | ||
645 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && | |
eaf55530 | 646 | !send_to_cooked) |
fe7a5d5c JB |
647 | continue; |
648 | ||
649 | if (prev_dev) { | |
650 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
651 | if (skb2) { | |
652 | skb2->dev = prev_dev; | |
4efe7f51 | 653 | netif_rx(skb2); |
fe7a5d5c JB |
654 | } |
655 | } | |
656 | ||
657 | prev_dev = sdata->dev; | |
658 | } | |
659 | } | |
660 | if (prev_dev) { | |
661 | skb->dev = prev_dev; | |
4efe7f51 | 662 | netif_rx(skb); |
fe7a5d5c JB |
663 | skb = NULL; |
664 | } | |
665 | rcu_read_unlock(); | |
666 | dev_kfree_skb(skb); | |
667 | } | |
668 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b AN |
669 | |
670 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) | |
671 | { | |
672 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
673 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
674 | num_packets, GFP_ATOMIC); | |
675 | } | |
676 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
677 | |
678 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
679 | { | |
a729cff8 | 680 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 681 | |
8a2fbedc | 682 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
683 | dev_kfree_skb_any(skb); |
684 | } | |
685 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
686 | |
687 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
688 | struct sk_buff_head *skbs) | |
689 | { | |
690 | struct sk_buff *skb; | |
691 | ||
692 | while ((skb = __skb_dequeue(skbs))) | |
693 | ieee80211_free_txskb(hw, skb); | |
694 | } |