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Commit | Line | Data |
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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> |
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 | ||
f0425bed FF |
183 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
184 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
185 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
186 | u16 tid = qc[0] & 0xf; | |
187 | ||
188 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
189 | } | |
190 | ||
0f78231b | 191 | if (ieee80211_is_action(mgmt->frame_control) && |
0f78231b | 192 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 JB |
193 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
194 | sdata->vif.type == NL80211_IFTYPE_STATION && | |
195 | ieee80211_sdata_running(sdata)) { | |
0f78231b JB |
196 | /* |
197 | * This update looks racy, but isn't -- if we come | |
198 | * here we've definitely got a station that we're | |
199 | * talking to, and on a managed interface that can | |
200 | * only be the AP. And the only other place updating | |
04ecd257 | 201 | * this variable in managed mode is before association. |
0f78231b JB |
202 | */ |
203 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
204 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
04ecd257 | 205 | sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
206 | break; |
207 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
04ecd257 | 208 | sdata->smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
209 | break; |
210 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
211 | default: /* shouldn't happen since we don't send that */ | |
04ecd257 | 212 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
213 | break; |
214 | } | |
215 | ||
04ecd257 | 216 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); |
0f78231b JB |
217 | } |
218 | } | |
219 | ||
f0425bed FF |
220 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
221 | { | |
222 | struct tid_ampdu_tx *tid_tx; | |
223 | ||
224 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
225 | if (!tid_tx) | |
226 | return; | |
227 | ||
228 | tid_tx->failed_bar_ssn = ssn; | |
229 | tid_tx->bar_pending = true; | |
230 | } | |
231 | ||
a2fe8166 HS |
232 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
233 | { | |
234 | int len = sizeof(struct ieee80211_radiotap_header); | |
235 | ||
236 | /* IEEE80211_RADIOTAP_RATE rate */ | |
237 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
238 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
239 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
240 | len += 2; |
241 | ||
242 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
243 | len += 2; | |
244 | ||
245 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
246 | len += 1; | |
247 | ||
a8241310 KB |
248 | /* IEEE80211_RADIOTAP_MCS |
249 | * IEEE80211_RADIOTAP_VHT */ | |
250 | if (info->status.rates[0].idx >= 0) { | |
251 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
252 | len += 3; | |
253 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
254 | len = ALIGN(len, 2) + 12; | |
255 | } | |
7f2a5e21 | 256 | |
a2fe8166 HS |
257 | return len; |
258 | } | |
259 | ||
2103dec1 | 260 | static void |
a8241310 KB |
261 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
262 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
263 | struct sk_buff *skb, int retry_count, |
264 | int rtap_len, int shift) | |
a2fe8166 HS |
265 | { |
266 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
267 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
268 | struct ieee80211_radiotap_header *rthdr; | |
269 | unsigned char *pos; | |
9c8f2c42 | 270 | u16 txflags; |
a2fe8166 HS |
271 | |
272 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); | |
273 | ||
274 | memset(rthdr, 0, rtap_len); | |
275 | rthdr->it_len = cpu_to_le16(rtap_len); | |
276 | rthdr->it_present = | |
277 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
278 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
279 | pos = (unsigned char *)(rthdr + 1); | |
280 | ||
281 | /* | |
282 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
283 | * extensions proposal contains, we can actually report | |
284 | * the whole set of tries we did. | |
285 | */ | |
286 | ||
287 | /* IEEE80211_RADIOTAP_RATE */ | |
288 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
289 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
290 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
291 | u16 rate; |
292 | ||
a2fe8166 | 293 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
294 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
295 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
296 | /* padding for tx flags */ |
297 | pos += 2; | |
298 | } | |
299 | ||
300 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
301 | txflags = 0; | |
302 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
303 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 304 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 HS |
305 | |
306 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
307 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
9c8f2c42 | 308 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
a2fe8166 | 309 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 310 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
311 | |
312 | put_unaligned_le16(txflags, pos); | |
313 | pos += 2; | |
314 | ||
315 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
316 | /* for now report the total retry_count */ | |
317 | *pos = retry_count; | |
318 | pos++; | |
7f2a5e21 | 319 | |
a8241310 KB |
320 | if (info->status.rates[0].idx < 0) |
321 | return; | |
322 | ||
323 | /* IEEE80211_RADIOTAP_MCS | |
324 | * IEEE80211_RADIOTAP_VHT */ | |
325 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
326 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
327 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
328 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
329 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
330 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
331 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
332 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
333 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
334 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
335 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
336 | pos[2] = info->status.rates[0].idx; | |
337 | pos += 3; | |
a8241310 KB |
338 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
339 | u16 known = local->hw.radiotap_vht_details & | |
340 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
341 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
342 | ||
343 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
344 | ||
345 | /* required alignment from rthdr */ | |
346 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 347 | |
a8241310 KB |
348 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
349 | put_unaligned_le16(known, pos); | |
350 | pos += 2; | |
351 | ||
352 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
353 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
354 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
355 | pos++; | |
356 | ||
357 | /* u8 bandwidth */ | |
358 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
359 | *pos = 1; | |
360 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
361 | *pos = 4; | |
362 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
363 | *pos = 11; | |
364 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
365 | *pos = 0; | |
366 | pos++; | |
367 | ||
368 | /* u8 mcs_nss[4] */ | |
369 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
370 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
371 | pos += 4; | |
372 | ||
373 | /* u8 coding */ | |
374 | pos++; | |
375 | /* u8 group_id */ | |
376 | pos++; | |
377 | /* u16 partial_aid */ | |
378 | pos += 2; | |
379 | } | |
a2fe8166 HS |
380 | } |
381 | ||
8a2fbedc JB |
382 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
383 | struct sk_buff *skb, bool dropped) | |
384 | { | |
385 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
386 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
387 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
388 | ||
389 | if (dropped) | |
390 | acked = false; | |
391 | ||
1672c0e3 JB |
392 | if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
393 | IEEE80211_TX_INTFL_MLME_CONN_TX)) { | |
8a2fbedc JB |
394 | struct ieee80211_sub_if_data *sdata = NULL; |
395 | struct ieee80211_sub_if_data *iter_sdata; | |
396 | u64 cookie = (unsigned long)skb; | |
397 | ||
398 | rcu_read_lock(); | |
399 | ||
400 | if (skb->dev) { | |
401 | list_for_each_entry_rcu(iter_sdata, &local->interfaces, | |
402 | list) { | |
403 | if (!iter_sdata->dev) | |
404 | continue; | |
405 | ||
406 | if (skb->dev == iter_sdata->dev) { | |
407 | sdata = iter_sdata; | |
408 | break; | |
409 | } | |
410 | } | |
411 | } else { | |
412 | sdata = rcu_dereference(local->p2p_sdata); | |
413 | } | |
414 | ||
1672c0e3 | 415 | if (!sdata) { |
8a2fbedc | 416 | skb->dev = NULL; |
1672c0e3 JB |
417 | } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
418 | ieee80211_mgd_conn_tx_status(sdata, hdr->frame_control, | |
419 | acked); | |
420 | } else if (ieee80211_is_nullfunc(hdr->frame_control) || | |
421 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
8a2fbedc JB |
422 | cfg80211_probe_status(sdata->dev, hdr->addr1, |
423 | cookie, acked, GFP_ATOMIC); | |
424 | } else { | |
425 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data, | |
426 | skb->len, acked, GFP_ATOMIC); | |
427 | } | |
428 | ||
429 | rcu_read_unlock(); | |
430 | } | |
431 | ||
432 | if (unlikely(info->ack_frame_id)) { | |
433 | struct sk_buff *ack_skb; | |
434 | unsigned long flags; | |
435 | ||
436 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
437 | ack_skb = idr_find(&local->ack_status_frames, | |
438 | info->ack_frame_id); | |
439 | if (ack_skb) | |
440 | idr_remove(&local->ack_status_frames, | |
441 | info->ack_frame_id); | |
442 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
443 | ||
444 | if (ack_skb) { | |
445 | if (!dropped) { | |
446 | /* consumes ack_skb */ | |
447 | skb_complete_wifi_ack(ack_skb, acked); | |
448 | } else { | |
449 | dev_kfree_skb_any(ack_skb); | |
450 | } | |
451 | } | |
452 | } | |
453 | } | |
454 | ||
99ba2a14 JB |
455 | /* |
456 | * Use a static threshold for now, best value to be determined | |
457 | * by testing ... | |
458 | * Should it depend on: | |
459 | * - on # of retransmissions | |
460 | * - current throughput (higher value for higher tpt)? | |
461 | */ | |
462 | #define STA_LOST_PKT_THRESHOLD 50 | |
463 | ||
fe7a5d5c JB |
464 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
465 | { | |
466 | struct sk_buff *skb2; | |
467 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
468 | struct ieee80211_local *local = hw_to_local(hw); | |
469 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
fe7a5d5c JB |
470 | __le16 fc; |
471 | struct ieee80211_supported_band *sband; | |
fe7a5d5c JB |
472 | struct ieee80211_sub_if_data *sdata; |
473 | struct net_device *prev_dev = NULL; | |
abe60632 | 474 | struct sta_info *sta, *tmp; |
fe7a5d5c | 475 | int retry_count = -1, i; |
0c869808 | 476 | int rates_idx = -1; |
eaf55530 | 477 | bool send_to_cooked; |
04ac3c0e | 478 | bool acked; |
e69deded | 479 | struct ieee80211_bar *bar; |
a2fe8166 | 480 | int rtap_len; |
2103dec1 | 481 | int shift = 0; |
fe7a5d5c JB |
482 | |
483 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
484 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
485 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
486 | /* just the first aggr frame carry status info */ | |
487 | info->status.rates[i].idx = -1; | |
488 | info->status.rates[i].count = 0; | |
489 | break; | |
490 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
491 | break; |
492 | } else if (i >= hw->max_report_rates) { | |
493 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
494 | info->status.rates[i].idx = -1; |
495 | info->status.rates[i].count = 0; | |
be7974aa | 496 | break; |
fe7a5d5c JB |
497 | } |
498 | ||
499 | retry_count += info->status.rates[i].count; | |
500 | } | |
be7974aa HS |
501 | rates_idx = i - 1; |
502 | ||
fe7a5d5c JB |
503 | if (retry_count < 0) |
504 | retry_count = 0; | |
505 | ||
506 | rcu_read_lock(); | |
507 | ||
508 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 509 | fc = hdr->frame_control; |
fe7a5d5c | 510 | |
abe60632 JB |
511 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
512 | /* skip wrong virtual interface */ | |
b203ca39 | 513 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
abe60632 | 514 | continue; |
fe7a5d5c | 515 | |
2103dec1 SW |
516 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
517 | ||
47086fc5 | 518 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 519 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 520 | |
04ac3c0e | 521 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
c2c98fde | 522 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
523 | /* |
524 | * The STA is in power save mode, so assume | |
525 | * that this TX packet failed because of that. | |
526 | */ | |
527 | ieee80211_handle_filtered_frame(local, sta, skb); | |
528 | rcu_read_unlock(); | |
529 | return; | |
530 | } | |
531 | ||
3f52b7e3 MP |
532 | /* mesh Peer Service Period support */ |
533 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
534 | ieee80211_is_data_qos(fc)) | |
535 | ieee80211_mpsp_trigger_process( | |
536 | ieee80211_get_qos_ctl(hdr), | |
537 | sta, true, acked); | |
538 | ||
0c869808 JO |
539 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
540 | (rates_idx != -1)) | |
541 | sta->last_tx_rate = info->status.rates[rates_idx]; | |
542 | ||
fe7a5d5c JB |
543 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
544 | (ieee80211_is_data_qos(fc))) { | |
545 | u16 tid, ssn; | |
546 | u8 *qc; | |
547 | ||
548 | qc = ieee80211_get_qos_ctl(hdr); | |
549 | tid = qc[0] & 0xf; | |
550 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
551 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 552 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c JB |
553 | tid, ssn); |
554 | } | |
555 | ||
e69deded | 556 | if (!acked && ieee80211_is_back_req(fc)) { |
8e7c4e4d | 557 | u16 tid, control; |
7107676a | 558 | |
e69deded | 559 | /* |
7107676a FF |
560 | * BAR failed, store the last SSN and retry sending |
561 | * the BAR when the next unicast transmission on the | |
562 | * same TID succeeds. | |
e69deded HS |
563 | */ |
564 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
565 | control = le16_to_cpu(bar->control); |
566 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
567 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
568 | ||
7107676a | 569 | tid = (control & |
e69deded HS |
570 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
571 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 572 | |
8df6b7b1 | 573 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
574 | } |
575 | } | |
576 | ||
fe7a5d5c JB |
577 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
578 | ieee80211_handle_filtered_frame(local, sta, skb); | |
579 | rcu_read_unlock(); | |
580 | return; | |
581 | } else { | |
04ac3c0e | 582 | if (!acked) |
fe7a5d5c JB |
583 | sta->tx_retry_failed++; |
584 | sta->tx_retry_count += retry_count; | |
585 | } | |
586 | ||
587 | rate_control_tx_status(local, sband, sta, skb); | |
588 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
589 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 590 | |
04ac3c0e | 591 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 592 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 593 | |
04ac3c0e FF |
594 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
595 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
596 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); | |
597 | ||
99ba2a14 JB |
598 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
599 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
600 | if (sta->lost_packets) | |
601 | sta->lost_packets = 0; | |
602 | } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { | |
603 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, | |
604 | sta->sta.addr, | |
605 | sta->lost_packets, | |
606 | GFP_ATOMIC); | |
607 | sta->lost_packets = 0; | |
608 | } | |
609 | } | |
db94357d S |
610 | |
611 | if (acked) | |
612 | sta->last_ack_signal = info->status.ack_signal; | |
fe7a5d5c JB |
613 | } |
614 | ||
615 | rcu_read_unlock(); | |
616 | ||
e47f2509 | 617 | ieee80211_led_tx(local); |
fe7a5d5c JB |
618 | |
619 | /* SNMP counters | |
620 | * Fragments are passed to low-level drivers as separate skbs, so these | |
621 | * are actually fragments, not frames. Update frame counters only for | |
622 | * the first fragment of the frame. */ | |
fe7a5d5c | 623 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
adf5ace5 | 624 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
fe7a5d5c JB |
625 | local->dot11TransmittedFrameCount++; |
626 | if (is_multicast_ether_addr(hdr->addr1)) | |
627 | local->dot11MulticastTransmittedFrameCount++; | |
628 | if (retry_count > 0) | |
629 | local->dot11RetryCount++; | |
630 | if (retry_count > 1) | |
631 | local->dot11MultipleRetryCount++; | |
632 | } | |
633 | ||
634 | /* This counter shall be incremented for an acknowledged MPDU | |
635 | * with an individual address in the address 1 field or an MPDU | |
636 | * with a multicast address in the address 1 field of type Data | |
637 | * or Management. */ | |
638 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
639 | ieee80211_is_data(fc) || |
640 | ieee80211_is_mgmt(fc)) | |
fe7a5d5c JB |
641 | local->dot11TransmittedFragmentCount++; |
642 | } else { | |
adf5ace5 | 643 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
fe7a5d5c JB |
644 | local->dot11FailedCount++; |
645 | } | |
646 | ||
375177bf VN |
647 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
648 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && | |
649 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && | |
650 | local->ps_sdata && !(local->scanning)) { | |
651 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
652 | local->ps_sdata->u.mgd.flags |= | |
653 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
654 | } else |
655 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
656 | msecs_to_jiffies(10)); | |
657 | } | |
658 | ||
8a2fbedc | 659 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 660 | |
fe7a5d5c JB |
661 | /* this was a transmitted frame, but now we want to reuse it */ |
662 | skb_orphan(skb); | |
663 | ||
eaf55530 FF |
664 | /* Need to make a copy before skb->cb gets cleared */ |
665 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 666 | !(ieee80211_is_data(fc)); |
eaf55530 | 667 | |
fe7a5d5c JB |
668 | /* |
669 | * This is a bit racy but we can avoid a lot of work | |
670 | * with this test... | |
671 | */ | |
eaf55530 | 672 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
673 | dev_kfree_skb(skb); |
674 | return; | |
675 | } | |
676 | ||
677 | /* send frame to monitor interfaces now */ | |
a2fe8166 HS |
678 | rtap_len = ieee80211_tx_radiotap_len(info); |
679 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
f0d23208 | 680 | pr_err("ieee80211_tx_status: headroom too small\n"); |
fe7a5d5c JB |
681 | dev_kfree_skb(skb); |
682 | return; | |
683 | } | |
a8241310 KB |
684 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, |
685 | rtap_len, shift); | |
fe7a5d5c JB |
686 | |
687 | /* XXX: is this sufficient for BPF? */ | |
688 | skb_set_mac_header(skb, 0); | |
689 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
690 | skb->pkt_type = PACKET_OTHERHOST; | |
691 | skb->protocol = htons(ETH_P_802_2); | |
692 | memset(skb->cb, 0, sizeof(skb->cb)); | |
693 | ||
694 | rcu_read_lock(); | |
695 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
696 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
9607e6b6 | 697 | if (!ieee80211_sdata_running(sdata)) |
fe7a5d5c JB |
698 | continue; |
699 | ||
700 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && | |
eaf55530 | 701 | !send_to_cooked) |
fe7a5d5c JB |
702 | continue; |
703 | ||
704 | if (prev_dev) { | |
705 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
706 | if (skb2) { | |
707 | skb2->dev = prev_dev; | |
4efe7f51 | 708 | netif_rx(skb2); |
fe7a5d5c JB |
709 | } |
710 | } | |
711 | ||
712 | prev_dev = sdata->dev; | |
713 | } | |
714 | } | |
715 | if (prev_dev) { | |
716 | skb->dev = prev_dev; | |
4efe7f51 | 717 | netif_rx(skb); |
fe7a5d5c JB |
718 | skb = NULL; |
719 | } | |
720 | rcu_read_unlock(); | |
721 | dev_kfree_skb(skb); | |
722 | } | |
723 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b AN |
724 | |
725 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) | |
726 | { | |
727 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
728 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
729 | num_packets, GFP_ATOMIC); | |
730 | } | |
731 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
732 | |
733 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
734 | { | |
a729cff8 | 735 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 736 | |
8a2fbedc | 737 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
738 | dev_kfree_skb_any(skb); |
739 | } | |
740 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
741 | |
742 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
743 | struct sk_buff_head *skbs) | |
744 | { | |
745 | struct sk_buff *skb; | |
746 | ||
747 | while ((skb = __skb_dequeue(skbs))) | |
748 | ieee80211_free_txskb(hw, skb); | |
749 | } |