1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright 2002-2005, Instant802 Networks, Inc. |
4 | * Copyright 2005-2006, Devicescape Software, Inc. |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
6 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
7 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8 | * Copyright 2021-2023 Intel Corporation |
9 | */ |
10 | |
11 | #include <linux/export.h> |
12 | #include <linux/etherdevice.h> |
13 | #include <net/mac80211.h> |
14 | #include <asm/unaligned.h> |
15 | #include "ieee80211_i.h" |
16 | #include "rate.h" |
17 | #include "mesh.h" |
18 | #include "led.h" |
19 | #include "wme.h" |
20 | |
21 | |
22 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
23 | struct sk_buff *skb) |
24 | { |
25 | struct ieee80211_local *local = hw_to_local(hw); |
26 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
27 | int tmp; |
28 | |
29 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
30 | skb_queue_tail(list: info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
31 | &local->skb_queue : &local->skb_queue_unreliable, newsk: skb); |
32 | tmp = skb_queue_len(list_: &local->skb_queue) + |
33 | skb_queue_len(list_: &local->skb_queue_unreliable); |
34 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
35 | (skb = skb_dequeue(list: &local->skb_queue_unreliable))) { |
36 | ieee80211_free_txskb(hw, skb); |
37 | tmp--; |
38 | I802_DEBUG_INC(local->tx_status_drop); |
39 | } |
40 | tasklet_schedule(t: &local->tasklet); |
41 | } |
42 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
43 | |
44 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
45 | struct sta_info *sta, |
46 | struct sk_buff *skb) |
47 | { |
48 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
49 | struct ieee80211_hdr *hdr = (void *)skb->data; |
50 | int ac; |
51 | |
52 | if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | |
53 | IEEE80211_TX_CTL_AMPDU | |
54 | IEEE80211_TX_CTL_HW_80211_ENCAP)) { |
55 | ieee80211_free_txskb(hw: &local->hw, skb); |
56 | return; |
57 | } |
58 | |
59 | /* |
60 | * This skb 'survived' a round-trip through the driver, and |
61 | * hopefully the driver didn't mangle it too badly. However, |
62 | * we can definitely not rely on the control information |
63 | * being correct. Clear it so we don't get junk there, and |
64 | * indicate that it needs new processing, but must not be |
65 | * modified/encrypted again. |
66 | */ |
67 | memset(&info->control, 0, sizeof(info->control)); |
68 | |
69 | info->control.jiffies = jiffies; |
70 | info->control.vif = &sta->sdata->vif; |
71 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
72 | info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION; |
73 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
74 | |
75 | sta->deflink.status_stats.filtered++; |
76 | |
77 | /* |
78 | * Clear more-data bit on filtered frames, it might be set |
79 | * but later frames might time out so it might have to be |
80 | * clear again ... It's all rather unlikely (this frame |
81 | * should time out first, right?) but let's not confuse |
82 | * peers unnecessarily. |
83 | */ |
84 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) |
85 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
86 | |
87 | if (ieee80211_is_data_qos(fc: hdr->frame_control)) { |
88 | u8 *p = ieee80211_get_qos_ctl(hdr); |
89 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; |
90 | |
91 | /* |
92 | * Clear EOSP if set, this could happen e.g. |
93 | * if an absence period (us being a P2P GO) |
94 | * shortens the SP. |
95 | */ |
96 | if (*p & IEEE80211_QOS_CTL_EOSP) |
97 | *p &= ~IEEE80211_QOS_CTL_EOSP; |
98 | ac = ieee80211_ac_from_tid(tid); |
99 | } else { |
100 | ac = IEEE80211_AC_BE; |
101 | } |
102 | |
103 | /* |
104 | * Clear the TX filter mask for this STA when sending the next |
105 | * packet. If the STA went to power save mode, this will happen |
106 | * when it wakes up for the next time. |
107 | */ |
108 | set_sta_flag(sta, flag: WLAN_STA_CLEAR_PS_FILT); |
109 | ieee80211_clear_fast_xmit(sta); |
110 | |
111 | /* |
112 | * This code races in the following way: |
113 | * |
114 | * (1) STA sends frame indicating it will go to sleep and does so |
115 | * (2) hardware/firmware adds STA to filter list, passes frame up |
116 | * (3) hardware/firmware processes TX fifo and suppresses a frame |
117 | * (4) we get TX status before having processed the frame and |
118 | * knowing that the STA has gone to sleep. |
119 | * |
120 | * This is actually quite unlikely even when both those events are |
121 | * processed from interrupts coming in quickly after one another or |
122 | * even at the same time because we queue both TX status events and |
123 | * RX frames to be processed by a tasklet and process them in the |
124 | * same order that they were received or TX status last. Hence, there |
125 | * is no race as long as the frame RX is processed before the next TX |
126 | * status, which drivers can ensure, see below. |
127 | * |
128 | * Note that this can only happen if the hardware or firmware can |
129 | * actually add STAs to the filter list, if this is done by the |
130 | * driver in response to set_tim() (which will only reduce the race |
131 | * this whole filtering tries to solve, not completely solve it) |
132 | * this situation cannot happen. |
133 | * |
134 | * To completely solve this race drivers need to make sure that they |
135 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
136 | * functions and |
137 | * (b) always process RX events before TX status events if ordering |
138 | * can be unknown, for example with different interrupt status |
139 | * bits. |
140 | * (c) if PS mode transitions are manual (i.e. the flag |
141 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state |
142 | * changes before calling TX status events if ordering can be |
143 | * unknown. |
144 | */ |
145 | if (test_sta_flag(sta, flag: WLAN_STA_PS_STA) && |
146 | skb_queue_len(list_: &sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
147 | skb_queue_tail(list: &sta->tx_filtered[ac], newsk: skb); |
148 | sta_info_recalc_tim(sta); |
149 | |
150 | if (!timer_pending(timer: &local->sta_cleanup)) |
151 | mod_timer(timer: &local->sta_cleanup, |
152 | expires: round_jiffies(j: jiffies + |
153 | STA_INFO_CLEANUP_INTERVAL)); |
154 | return; |
155 | } |
156 | |
157 | if (!test_sta_flag(sta, flag: WLAN_STA_PS_STA) && |
158 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
159 | /* Software retry the packet once */ |
160 | info->flags |= IEEE80211_TX_INTFL_RETRIED; |
161 | ieee80211_add_pending_skb(local, skb); |
162 | return; |
163 | } |
164 | |
165 | ps_dbg_ratelimited(sta->sdata, |
166 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n" , |
167 | skb_queue_len(&sta->tx_filtered[ac]), |
168 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); |
169 | ieee80211_free_txskb(hw: &local->hw, skb); |
170 | } |
171 | |
172 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
173 | { |
174 | struct tid_ampdu_tx *tid_tx; |
175 | |
176 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
177 | if (!tid_tx || !tid_tx->bar_pending) |
178 | return; |
179 | |
180 | tid_tx->bar_pending = false; |
181 | ieee80211_send_bar(vif: &sta->sdata->vif, ra: addr, tid, ssn: tid_tx->failed_bar_ssn); |
182 | } |
183 | |
184 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
185 | { |
186 | struct ieee80211_mgmt *mgmt = (void *) skb->data; |
187 | |
188 | if (ieee80211_is_data_qos(fc: mgmt->frame_control)) { |
189 | struct ieee80211_hdr *hdr = (void *) skb->data; |
190 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
191 | u16 tid = qc[0] & 0xf; |
192 | |
193 | ieee80211_check_pending_bar(sta, addr: hdr->addr1, tid); |
194 | } |
195 | } |
196 | |
197 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
198 | { |
199 | struct tid_ampdu_tx *tid_tx; |
200 | |
201 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
202 | if (!tid_tx) |
203 | return; |
204 | |
205 | tid_tx->failed_bar_ssn = ssn; |
206 | tid_tx->bar_pending = true; |
207 | } |
208 | |
209 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, |
210 | struct ieee80211_tx_status *status) |
211 | { |
212 | struct ieee80211_rate_status *status_rate = NULL; |
213 | int len = sizeof(struct ieee80211_radiotap_header); |
214 | |
215 | if (status && status->n_rates) |
216 | status_rate = &status->rates[status->n_rates - 1]; |
217 | |
218 | /* IEEE80211_RADIOTAP_RATE rate */ |
219 | if (status_rate && !(status_rate->rate_idx.flags & |
220 | (RATE_INFO_FLAGS_MCS | |
221 | RATE_INFO_FLAGS_DMG | |
222 | RATE_INFO_FLAGS_EDMG | |
223 | RATE_INFO_FLAGS_VHT_MCS | |
224 | RATE_INFO_FLAGS_HE_MCS))) |
225 | len += 2; |
226 | else if (info->status.rates[0].idx >= 0 && |
227 | !(info->status.rates[0].flags & |
228 | (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) |
229 | len += 2; |
230 | |
231 | /* IEEE80211_RADIOTAP_TX_FLAGS */ |
232 | len += 2; |
233 | |
234 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
235 | len += 1; |
236 | |
237 | /* IEEE80211_RADIOTAP_MCS |
238 | * IEEE80211_RADIOTAP_VHT */ |
239 | if (status_rate) { |
240 | if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS) |
241 | len += 3; |
242 | else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS) |
243 | len = ALIGN(len, 2) + 12; |
244 | else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS) |
245 | len = ALIGN(len, 2) + 12; |
246 | } else if (info->status.rates[0].idx >= 0) { |
247 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) |
248 | len += 3; |
249 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) |
250 | len = ALIGN(len, 2) + 12; |
251 | } |
252 | |
253 | return len; |
254 | } |
255 | |
256 | static void |
257 | (struct ieee80211_local *local, |
258 | struct sk_buff *skb, int retry_count, |
259 | int rtap_len, |
260 | struct ieee80211_tx_status *status) |
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 | struct ieee80211_rate_status *status_rate = NULL; |
266 | unsigned char *pos; |
267 | u16 legacy_rate = 0; |
268 | u16 txflags; |
269 | |
270 | if (status && status->n_rates) |
271 | status_rate = &status->rates[status->n_rates - 1]; |
272 | |
273 | rthdr = skb_push(skb, len: rtap_len); |
274 | |
275 | memset(rthdr, 0, rtap_len); |
276 | rthdr->it_len = cpu_to_le16(rtap_len); |
277 | rthdr->it_present = |
278 | cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | |
279 | BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); |
280 | pos = (unsigned char *)(rthdr + 1); |
281 | |
282 | /* |
283 | * XXX: Once radiotap gets the bitmap reset thing the vendor |
284 | * extensions proposal contains, we can actually report |
285 | * the whole set of tries we did. |
286 | */ |
287 | |
288 | /* IEEE80211_RADIOTAP_RATE */ |
289 | |
290 | if (status_rate) { |
291 | if (!(status_rate->rate_idx.flags & |
292 | (RATE_INFO_FLAGS_MCS | |
293 | RATE_INFO_FLAGS_DMG | |
294 | RATE_INFO_FLAGS_EDMG | |
295 | RATE_INFO_FLAGS_VHT_MCS | |
296 | RATE_INFO_FLAGS_HE_MCS))) |
297 | legacy_rate = status_rate->rate_idx.legacy; |
298 | } else if (info->status.rates[0].idx >= 0 && |
299 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
300 | IEEE80211_TX_RC_VHT_MCS))) { |
301 | struct ieee80211_supported_band *sband; |
302 | |
303 | sband = local->hw.wiphy->bands[info->band]; |
304 | legacy_rate = |
305 | sband->bitrates[info->status.rates[0].idx].bitrate; |
306 | } |
307 | |
308 | if (legacy_rate) { |
309 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); |
310 | *pos = DIV_ROUND_UP(legacy_rate, 5); |
311 | /* padding for tx flags */ |
312 | pos += 2; |
313 | } |
314 | |
315 | /* IEEE80211_RADIOTAP_TX_FLAGS */ |
316 | txflags = 0; |
317 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
318 | !is_multicast_ether_addr(addr: hdr->addr1)) |
319 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
320 | |
321 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
322 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
323 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
324 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
325 | |
326 | put_unaligned_le16(val: txflags, p: pos); |
327 | pos += 2; |
328 | |
329 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
330 | /* for now report the total retry_count */ |
331 | *pos = retry_count; |
332 | pos++; |
333 | |
334 | if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) |
335 | { |
336 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); |
337 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | |
338 | IEEE80211_RADIOTAP_MCS_HAVE_GI | |
339 | IEEE80211_RADIOTAP_MCS_HAVE_BW; |
340 | if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) |
341 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; |
342 | if (status_rate->rate_idx.bw == RATE_INFO_BW_40) |
343 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; |
344 | pos[2] = status_rate->rate_idx.mcs; |
345 | pos += 3; |
346 | } else if (status_rate && (status_rate->rate_idx.flags & |
347 | RATE_INFO_FLAGS_VHT_MCS)) |
348 | { |
349 | u16 known = local->hw.radiotap_vht_details & |
350 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | |
351 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); |
352 | |
353 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); |
354 | |
355 | /* required alignment from rthdr */ |
356 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); |
357 | |
358 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
359 | put_unaligned_le16(val: known, p: pos); |
360 | pos += 2; |
361 | |
362 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ |
363 | if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) |
364 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
365 | pos++; |
366 | |
367 | /* u8 bandwidth */ |
368 | switch (status_rate->rate_idx.bw) { |
369 | case RATE_INFO_BW_160: |
370 | *pos = 11; |
371 | break; |
372 | case RATE_INFO_BW_80: |
373 | *pos = 4; |
374 | break; |
375 | case RATE_INFO_BW_40: |
376 | *pos = 1; |
377 | break; |
378 | default: |
379 | *pos = 0; |
380 | break; |
381 | } |
382 | pos++; |
383 | |
384 | /* u8 mcs_nss[4] */ |
385 | *pos = (status_rate->rate_idx.mcs << 4) | |
386 | status_rate->rate_idx.nss; |
387 | pos += 4; |
388 | |
389 | /* u8 coding */ |
390 | pos++; |
391 | /* u8 group_id */ |
392 | pos++; |
393 | /* u16 partial_aid */ |
394 | pos += 2; |
395 | } else if (status_rate && (status_rate->rate_idx.flags & |
396 | RATE_INFO_FLAGS_HE_MCS)) |
397 | { |
398 | struct ieee80211_radiotap_he *he; |
399 | |
400 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); |
401 | |
402 | /* required alignment from rthdr */ |
403 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); |
404 | he = (struct ieee80211_radiotap_he *)pos; |
405 | |
406 | he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | |
407 | IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | |
408 | IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | |
409 | IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); |
410 | |
411 | he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); |
412 | |
413 | #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) |
414 | |
415 | he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); |
416 | |
417 | #define CHECK_GI(s) \ |
418 | BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ |
419 | (int)NL80211_RATE_INFO_HE_GI_##s) |
420 | |
421 | CHECK_GI(0_8); |
422 | CHECK_GI(1_6); |
423 | CHECK_GI(3_2); |
424 | |
425 | he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); |
426 | he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); |
427 | |
428 | he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); |
429 | |
430 | switch (status_rate->rate_idx.bw) { |
431 | case RATE_INFO_BW_20: |
432 | he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, |
433 | IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); |
434 | break; |
435 | case RATE_INFO_BW_40: |
436 | he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, |
437 | IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); |
438 | break; |
439 | case RATE_INFO_BW_80: |
440 | he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, |
441 | IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); |
442 | break; |
443 | case RATE_INFO_BW_160: |
444 | he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, |
445 | IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); |
446 | break; |
447 | case RATE_INFO_BW_HE_RU: |
448 | #define CHECK_RU_ALLOC(s) \ |
449 | BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ |
450 | NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) |
451 | |
452 | CHECK_RU_ALLOC(26); |
453 | CHECK_RU_ALLOC(52); |
454 | CHECK_RU_ALLOC(106); |
455 | CHECK_RU_ALLOC(242); |
456 | CHECK_RU_ALLOC(484); |
457 | CHECK_RU_ALLOC(996); |
458 | CHECK_RU_ALLOC(2x996); |
459 | |
460 | he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, |
461 | status_rate->rate_idx.he_ru_alloc + 4); |
462 | break; |
463 | default: |
464 | WARN_ONCE(1, "Invalid SU BW %d\n" , status_rate->rate_idx.bw); |
465 | } |
466 | |
467 | pos += sizeof(struct ieee80211_radiotap_he); |
468 | } |
469 | |
470 | if (status_rate || info->status.rates[0].idx < 0) |
471 | return; |
472 | |
473 | /* IEEE80211_RADIOTAP_MCS |
474 | * IEEE80211_RADIOTAP_VHT */ |
475 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { |
476 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); |
477 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | |
478 | IEEE80211_RADIOTAP_MCS_HAVE_GI | |
479 | IEEE80211_RADIOTAP_MCS_HAVE_BW; |
480 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) |
481 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; |
482 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
483 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; |
484 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) |
485 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
486 | pos[2] = info->status.rates[0].idx; |
487 | pos += 3; |
488 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
489 | u16 known = local->hw.radiotap_vht_details & |
490 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | |
491 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); |
492 | |
493 | rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); |
494 | |
495 | /* required alignment from rthdr */ |
496 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); |
497 | |
498 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
499 | put_unaligned_le16(val: known, p: pos); |
500 | pos += 2; |
501 | |
502 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ |
503 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) |
504 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
505 | pos++; |
506 | |
507 | /* u8 bandwidth */ |
508 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
509 | *pos = 1; |
510 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) |
511 | *pos = 4; |
512 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) |
513 | *pos = 11; |
514 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ |
515 | *pos = 0; |
516 | pos++; |
517 | |
518 | /* u8 mcs_nss[4] */ |
519 | *pos = (ieee80211_rate_get_vht_mcs(rate: &info->status.rates[0]) << 4) | |
520 | ieee80211_rate_get_vht_nss(rate: &info->status.rates[0]); |
521 | pos += 4; |
522 | |
523 | /* u8 coding */ |
524 | pos++; |
525 | /* u8 group_id */ |
526 | pos++; |
527 | /* u16 partial_aid */ |
528 | pos += 2; |
529 | } |
530 | } |
531 | |
532 | /* |
533 | * Handles the tx for TDLS teardown frames. |
534 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP |
535 | */ |
536 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, |
537 | struct ieee80211_sub_if_data *sdata, |
538 | struct sk_buff *skb, u32 flags) |
539 | { |
540 | struct sk_buff *teardown_skb; |
541 | struct sk_buff *orig_teardown_skb; |
542 | bool is_teardown = false; |
543 | |
544 | /* Get the teardown data we need and free the lock */ |
545 | spin_lock(lock: &sdata->u.mgd.teardown_lock); |
546 | teardown_skb = sdata->u.mgd.teardown_skb; |
547 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; |
548 | if ((skb == orig_teardown_skb) && teardown_skb) { |
549 | sdata->u.mgd.teardown_skb = NULL; |
550 | sdata->u.mgd.orig_teardown_skb = NULL; |
551 | is_teardown = true; |
552 | } |
553 | spin_unlock(lock: &sdata->u.mgd.teardown_lock); |
554 | |
555 | if (is_teardown) { |
556 | /* This mechanism relies on being able to get ACKs */ |
557 | WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); |
558 | |
559 | /* Check if peer has ACKed */ |
560 | if (flags & IEEE80211_TX_STAT_ACK) { |
561 | dev_kfree_skb_any(skb: teardown_skb); |
562 | } else { |
563 | tdls_dbg(sdata, |
564 | "TDLS Resending teardown through AP\n" ); |
565 | |
566 | ieee80211_subif_start_xmit(skb: teardown_skb, dev: skb->dev); |
567 | } |
568 | } |
569 | } |
570 | |
571 | static struct ieee80211_sub_if_data * |
572 | ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) |
573 | { |
574 | struct ieee80211_sub_if_data *sdata; |
575 | |
576 | if (skb->dev) { |
577 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
578 | if (!sdata->dev) |
579 | continue; |
580 | |
581 | if (skb->dev == sdata->dev) |
582 | return sdata; |
583 | } |
584 | |
585 | return NULL; |
586 | } |
587 | |
588 | return rcu_dereference(local->p2p_sdata); |
589 | } |
590 | |
591 | static void ieee80211_report_ack_skb(struct ieee80211_local *local, |
592 | struct sk_buff *orig_skb, |
593 | bool acked, bool dropped, |
594 | ktime_t ack_hwtstamp) |
595 | { |
596 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: orig_skb); |
597 | struct sk_buff *skb; |
598 | unsigned long flags; |
599 | |
600 | spin_lock_irqsave(&local->ack_status_lock, flags); |
601 | skb = idr_remove(&local->ack_status_frames, id: info->status_data); |
602 | spin_unlock_irqrestore(lock: &local->ack_status_lock, flags); |
603 | |
604 | if (!skb) |
605 | return; |
606 | |
607 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
608 | u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; |
609 | struct ieee80211_sub_if_data *sdata; |
610 | struct ieee80211_hdr *hdr = (void *)skb->data; |
611 | bool is_valid_ack_signal = |
612 | !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); |
613 | struct cfg80211_tx_status status = { |
614 | .cookie = cookie, |
615 | .buf = skb->data, |
616 | .len = skb->len, |
617 | .ack = acked, |
618 | }; |
619 | |
620 | if (ieee80211_is_timing_measurement(skb: orig_skb) || |
621 | ieee80211_is_ftm(skb: orig_skb)) { |
622 | status.tx_tstamp = |
623 | ktime_to_ns(kt: skb_hwtstamps(skb: orig_skb)->hwtstamp); |
624 | status.ack_tstamp = ktime_to_ns(kt: ack_hwtstamp); |
625 | } |
626 | |
627 | rcu_read_lock(); |
628 | sdata = ieee80211_sdata_from_skb(local, skb); |
629 | if (sdata) { |
630 | if (skb->protocol == sdata->control_port_protocol || |
631 | skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) |
632 | cfg80211_control_port_tx_status(wdev: &sdata->wdev, |
633 | cookie, |
634 | buf: skb->data, |
635 | len: skb->len, |
636 | ack: acked, |
637 | GFP_ATOMIC); |
638 | else if (ieee80211_is_any_nullfunc(fc: hdr->frame_control)) |
639 | cfg80211_probe_status(dev: sdata->dev, addr: hdr->addr1, |
640 | cookie, acked, |
641 | ack_signal: info->status.ack_signal, |
642 | is_valid_ack_signal, |
643 | GFP_ATOMIC); |
644 | else if (ieee80211_is_mgmt(fc: hdr->frame_control)) |
645 | cfg80211_mgmt_tx_status_ext(wdev: &sdata->wdev, |
646 | status: &status, |
647 | GFP_ATOMIC); |
648 | else |
649 | pr_warn("Unknown status report in ack skb\n" ); |
650 | |
651 | } |
652 | rcu_read_unlock(); |
653 | |
654 | dev_kfree_skb_any(skb); |
655 | } else if (dropped) { |
656 | dev_kfree_skb_any(skb); |
657 | } else { |
658 | /* consumes skb */ |
659 | skb_complete_wifi_ack(skb, acked); |
660 | } |
661 | } |
662 | |
663 | static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata, |
664 | bool acked, u16 status_data) |
665 | { |
666 | u16 sub_data = u16_get_bits(v: status_data, field: IEEE80211_STATUS_SUBDATA_MASK); |
667 | enum ieee80211_smps_mode smps_mode = sub_data & 3; |
668 | int link_id = (sub_data >> 2); |
669 | struct ieee80211_link_data *link; |
670 | |
671 | if (!sdata || !ieee80211_sdata_running(sdata)) |
672 | return; |
673 | |
674 | if (!acked) |
675 | return; |
676 | |
677 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
678 | return; |
679 | |
680 | if (WARN(link_id >= ARRAY_SIZE(sdata->link), |
681 | "bad SMPS status link: %d\n" , link_id)) |
682 | return; |
683 | |
684 | link = rcu_dereference(sdata->link[link_id]); |
685 | if (!link) |
686 | return; |
687 | |
688 | /* |
689 | * This update looks racy, but isn't, the only other place |
690 | * updating this variable is in managed mode before assoc, |
691 | * and we have to be associated to have a status from the |
692 | * action frame TX, since we cannot send it while we're not |
693 | * associated yet. |
694 | */ |
695 | link->smps_mode = smps_mode; |
696 | wiphy_work_queue(wiphy: sdata->local->hw.wiphy, work: &link->u.mgd.recalc_smps); |
697 | } |
698 | |
699 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
700 | struct sk_buff *skb, bool dropped, |
701 | ktime_t ack_hwtstamp) |
702 | { |
703 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
704 | u16 tx_time_est = ieee80211_info_get_tx_time_est(info); |
705 | struct ieee80211_hdr *hdr = (void *)skb->data; |
706 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; |
707 | |
708 | if (dropped) |
709 | acked = false; |
710 | |
711 | if (tx_time_est) { |
712 | struct sta_info *sta; |
713 | |
714 | rcu_read_lock(); |
715 | |
716 | sta = sta_info_get_by_addrs(local, sta_addr: hdr->addr1, vif_addr: hdr->addr2); |
717 | ieee80211_sta_update_pending_airtime(local, sta, |
718 | ac: skb_get_queue_mapping(skb), |
719 | tx_airtime: tx_time_est, |
720 | tx_completed: true); |
721 | rcu_read_unlock(); |
722 | } |
723 | |
724 | if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
725 | struct ieee80211_sub_if_data *sdata; |
726 | |
727 | rcu_read_lock(); |
728 | |
729 | sdata = ieee80211_sdata_from_skb(local, skb); |
730 | |
731 | if (!sdata) { |
732 | skb->dev = NULL; |
733 | } else if (!dropped) { |
734 | /* Check to see if packet is a TDLS teardown packet */ |
735 | if (ieee80211_is_data(fc: hdr->frame_control) && |
736 | (ieee80211_get_tdls_action(skb) == |
737 | WLAN_TDLS_TEARDOWN)) { |
738 | ieee80211_tdls_td_tx_handle(local, sdata, skb, |
739 | flags: info->flags); |
740 | } else if (ieee80211_s1g_is_twt_setup(skb)) { |
741 | if (!acked) { |
742 | struct sk_buff *qskb; |
743 | |
744 | qskb = skb_clone(skb, GFP_ATOMIC); |
745 | if (qskb) { |
746 | skb_queue_tail(list: &sdata->status_queue, |
747 | newsk: qskb); |
748 | wiphy_work_queue(wiphy: local->hw.wiphy, |
749 | work: &sdata->work); |
750 | } |
751 | } |
752 | } else { |
753 | ieee80211_mgd_conn_tx_status(sdata, |
754 | fc: hdr->frame_control, |
755 | acked); |
756 | } |
757 | } |
758 | |
759 | rcu_read_unlock(); |
760 | } else if (info->status_data_idr) { |
761 | ieee80211_report_ack_skb(local, orig_skb: skb, acked, dropped, |
762 | ack_hwtstamp); |
763 | } else if (info->status_data) { |
764 | struct ieee80211_sub_if_data *sdata; |
765 | |
766 | rcu_read_lock(); |
767 | |
768 | sdata = ieee80211_sdata_from_skb(local, skb); |
769 | |
770 | switch (u16_get_bits(v: info->status_data, |
771 | field: IEEE80211_STATUS_TYPE_MASK)) { |
772 | case IEEE80211_STATUS_TYPE_SMPS: |
773 | ieee80211_handle_smps_status(sdata, acked, |
774 | status_data: info->status_data); |
775 | break; |
776 | } |
777 | rcu_read_unlock(); |
778 | } |
779 | |
780 | if (!dropped && skb->destructor) { |
781 | skb->wifi_acked_valid = 1; |
782 | skb->wifi_acked = acked; |
783 | } |
784 | |
785 | ieee80211_led_tx(local); |
786 | |
787 | if (skb_has_frag_list(skb)) { |
788 | kfree_skb_list(skb_shinfo(skb)->frag_list); |
789 | skb_shinfo(skb)->frag_list = NULL; |
790 | } |
791 | } |
792 | |
793 | /* |
794 | * Use a static threshold for now, best value to be determined |
795 | * by testing ... |
796 | * Should it depend on: |
797 | * - on # of retransmissions |
798 | * - current throughput (higher value for higher tpt)? |
799 | */ |
800 | #define STA_LOST_PKT_THRESHOLD 50 |
801 | #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ |
802 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ |
803 | |
804 | static void ieee80211_lost_packet(struct sta_info *sta, |
805 | struct ieee80211_tx_info *info) |
806 | { |
807 | unsigned long pkt_time = STA_LOST_PKT_TIME; |
808 | unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; |
809 | |
810 | /* If driver relies on its own algorithm for station kickout, skip |
811 | * mac80211 packet loss mechanism. |
812 | */ |
813 | if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) |
814 | return; |
815 | |
816 | /* This packet was aggregated but doesn't carry status info */ |
817 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
818 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) |
819 | return; |
820 | |
821 | sta->deflink.status_stats.lost_packets++; |
822 | if (sta->sta.tdls) { |
823 | pkt_time = STA_LOST_TDLS_PKT_TIME; |
824 | pkt_thr = STA_LOST_PKT_THRESHOLD; |
825 | } |
826 | |
827 | /* |
828 | * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD |
829 | * of the last packets were lost, and that no ACK was received in the |
830 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss |
831 | * mechanism. |
832 | * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME |
833 | */ |
834 | if (sta->deflink.status_stats.lost_packets < pkt_thr || |
835 | !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) |
836 | return; |
837 | |
838 | cfg80211_cqm_pktloss_notify(dev: sta->sdata->dev, peer: sta->sta.addr, |
839 | num_packets: sta->deflink.status_stats.lost_packets, |
840 | GFP_ATOMIC); |
841 | sta->deflink.status_stats.lost_packets = 0; |
842 | } |
843 | |
844 | static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, |
845 | struct ieee80211_tx_info *info, |
846 | int *retry_count) |
847 | { |
848 | int count = -1; |
849 | int i; |
850 | |
851 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
852 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
853 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { |
854 | /* just the first aggr frame carry status info */ |
855 | info->status.rates[i].idx = -1; |
856 | info->status.rates[i].count = 0; |
857 | break; |
858 | } else if (info->status.rates[i].idx < 0) { |
859 | break; |
860 | } else if (i >= hw->max_report_rates) { |
861 | /* the HW cannot have attempted that rate */ |
862 | info->status.rates[i].idx = -1; |
863 | info->status.rates[i].count = 0; |
864 | break; |
865 | } |
866 | |
867 | count += info->status.rates[i].count; |
868 | } |
869 | |
870 | if (count < 0) |
871 | count = 0; |
872 | |
873 | *retry_count = count; |
874 | return i - 1; |
875 | } |
876 | |
877 | void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, |
878 | int retry_count, bool send_to_cooked, |
879 | struct ieee80211_tx_status *status) |
880 | { |
881 | struct sk_buff *skb2; |
882 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
883 | struct ieee80211_sub_if_data *sdata; |
884 | struct net_device *prev_dev = NULL; |
885 | int rtap_len; |
886 | |
887 | /* send frame to monitor interfaces now */ |
888 | rtap_len = ieee80211_tx_radiotap_len(info, status); |
889 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { |
890 | pr_err("ieee80211_tx_status: headroom too small\n" ); |
891 | dev_kfree_skb(skb); |
892 | return; |
893 | } |
894 | ieee80211_add_tx_radiotap_header(local, skb, retry_count, |
895 | rtap_len, status); |
896 | |
897 | /* XXX: is this sufficient for BPF? */ |
898 | skb_reset_mac_header(skb); |
899 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
900 | skb->pkt_type = PACKET_OTHERHOST; |
901 | skb->protocol = htons(ETH_P_802_2); |
902 | memset(skb->cb, 0, sizeof(skb->cb)); |
903 | |
904 | rcu_read_lock(); |
905 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
906 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
907 | if (!ieee80211_sdata_running(sdata)) |
908 | continue; |
909 | |
910 | if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && |
911 | !send_to_cooked) |
912 | continue; |
913 | |
914 | if (prev_dev) { |
915 | skb2 = skb_clone(skb, GFP_ATOMIC); |
916 | if (skb2) { |
917 | skb2->dev = prev_dev; |
918 | netif_rx(skb: skb2); |
919 | } |
920 | } |
921 | |
922 | prev_dev = sdata->dev; |
923 | } |
924 | } |
925 | if (prev_dev) { |
926 | skb->dev = prev_dev; |
927 | netif_rx(skb); |
928 | skb = NULL; |
929 | } |
930 | rcu_read_unlock(); |
931 | dev_kfree_skb(skb); |
932 | } |
933 | |
934 | static void __ieee80211_tx_status(struct ieee80211_hw *hw, |
935 | struct ieee80211_tx_status *status, |
936 | int rates_idx, int retry_count) |
937 | { |
938 | struct sk_buff *skb = status->skb; |
939 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
940 | struct ieee80211_local *local = hw_to_local(hw); |
941 | struct ieee80211_tx_info *info = status->info; |
942 | struct sta_info *sta; |
943 | __le16 fc; |
944 | bool send_to_cooked; |
945 | bool acked; |
946 | bool noack_success; |
947 | struct ieee80211_bar *bar; |
948 | int tid = IEEE80211_NUM_TIDS; |
949 | |
950 | fc = hdr->frame_control; |
951 | |
952 | if (status->sta) { |
953 | sta = container_of(status->sta, struct sta_info, sta); |
954 | |
955 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
956 | clear_sta_flag(sta, flag: WLAN_STA_SP); |
957 | |
958 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
959 | noack_success = !!(info->flags & |
960 | IEEE80211_TX_STAT_NOACK_TRANSMITTED); |
961 | |
962 | /* mesh Peer Service Period support */ |
963 | if (ieee80211_vif_is_mesh(vif: &sta->sdata->vif) && |
964 | ieee80211_is_data_qos(fc)) |
965 | ieee80211_mpsp_trigger_process( |
966 | qc: ieee80211_get_qos_ctl(hdr), sta, tx: true, acked); |
967 | |
968 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && |
969 | (ieee80211_is_data(fc: hdr->frame_control)) && |
970 | (rates_idx != -1)) |
971 | sta->deflink.tx_stats.last_rate = |
972 | info->status.rates[rates_idx]; |
973 | |
974 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
975 | (ieee80211_is_data_qos(fc))) { |
976 | u16 ssn; |
977 | u8 *qc; |
978 | |
979 | qc = ieee80211_get_qos_ctl(hdr); |
980 | tid = qc[0] & 0xf; |
981 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
982 | & IEEE80211_SCTL_SEQ); |
983 | ieee80211_send_bar(vif: &sta->sdata->vif, ra: hdr->addr1, |
984 | tid, ssn); |
985 | } else if (ieee80211_is_data_qos(fc)) { |
986 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
987 | |
988 | tid = qc[0] & 0xf; |
989 | } |
990 | |
991 | if (!acked && ieee80211_is_back_req(fc)) { |
992 | u16 control; |
993 | |
994 | /* |
995 | * BAR failed, store the last SSN and retry sending |
996 | * the BAR when the next unicast transmission on the |
997 | * same TID succeeds. |
998 | */ |
999 | bar = (struct ieee80211_bar *) skb->data; |
1000 | control = le16_to_cpu(bar->control); |
1001 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { |
1002 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
1003 | |
1004 | tid = (control & |
1005 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
1006 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; |
1007 | |
1008 | ieee80211_set_bar_pending(sta, tid, ssn); |
1009 | } |
1010 | } |
1011 | |
1012 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
1013 | ieee80211_handle_filtered_frame(local, sta, skb); |
1014 | return; |
1015 | } else if (ieee80211_is_data_present(fc)) { |
1016 | if (!acked && !noack_success) |
1017 | sta->deflink.status_stats.msdu_failed[tid]++; |
1018 | |
1019 | sta->deflink.status_stats.msdu_retries[tid] += |
1020 | retry_count; |
1021 | } |
1022 | |
1023 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
1024 | ieee80211_frame_acked(sta, skb); |
1025 | |
1026 | } |
1027 | |
1028 | /* SNMP counters |
1029 | * Fragments are passed to low-level drivers as separate skbs, so these |
1030 | * are actually fragments, not frames. Update frame counters only for |
1031 | * the first fragment of the frame. */ |
1032 | if ((info->flags & IEEE80211_TX_STAT_ACK) || |
1033 | (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { |
1034 | if (ieee80211_is_first_frag(seq_ctrl: hdr->seq_ctrl)) { |
1035 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
1036 | if (is_multicast_ether_addr(addr: ieee80211_get_DA(hdr))) |
1037 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
1038 | if (retry_count > 0) |
1039 | I802_DEBUG_INC(local->dot11RetryCount); |
1040 | if (retry_count > 1) |
1041 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
1042 | } |
1043 | |
1044 | /* This counter shall be incremented for an acknowledged MPDU |
1045 | * with an individual address in the address 1 field or an MPDU |
1046 | * with a multicast address in the address 1 field of type Data |
1047 | * or Management. */ |
1048 | if (!is_multicast_ether_addr(addr: hdr->addr1) || |
1049 | ieee80211_is_data(fc) || |
1050 | ieee80211_is_mgmt(fc)) |
1051 | I802_DEBUG_INC(local->dot11TransmittedFragmentCount); |
1052 | } else { |
1053 | if (ieee80211_is_first_frag(seq_ctrl: hdr->seq_ctrl)) |
1054 | I802_DEBUG_INC(local->dot11FailedCount); |
1055 | } |
1056 | |
1057 | if (ieee80211_is_any_nullfunc(fc) && |
1058 | ieee80211_has_pm(fc) && |
1059 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
1060 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
1061 | local->ps_sdata && !(local->scanning)) { |
1062 | if (info->flags & IEEE80211_TX_STAT_ACK) |
1063 | local->ps_sdata->u.mgd.flags |= |
1064 | IEEE80211_STA_NULLFUNC_ACKED; |
1065 | mod_timer(timer: &local->dynamic_ps_timer, |
1066 | expires: jiffies + msecs_to_jiffies(m: 10)); |
1067 | } |
1068 | |
1069 | ieee80211_report_used_skb(local, skb, dropped: false, ack_hwtstamp: status->ack_hwtstamp); |
1070 | |
1071 | /* this was a transmitted frame, but now we want to reuse it */ |
1072 | skb_orphan(skb); |
1073 | |
1074 | /* Need to make a copy before skb->cb gets cleared */ |
1075 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || |
1076 | !(ieee80211_is_data(fc)); |
1077 | |
1078 | /* |
1079 | * This is a bit racy but we can avoid a lot of work |
1080 | * with this test... |
1081 | */ |
1082 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
1083 | if (status->free_list) |
1084 | list_add_tail(new: &skb->list, head: status->free_list); |
1085 | else |
1086 | dev_kfree_skb(skb); |
1087 | return; |
1088 | } |
1089 | |
1090 | /* send to monitor interfaces */ |
1091 | ieee80211_tx_monitor(local, skb, retry_count, |
1092 | send_to_cooked, status); |
1093 | } |
1094 | |
1095 | void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb) |
1096 | { |
1097 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
1098 | struct ieee80211_local *local = hw_to_local(hw); |
1099 | struct ieee80211_tx_status status = { |
1100 | .skb = skb, |
1101 | .info = IEEE80211_SKB_CB(skb), |
1102 | }; |
1103 | struct sta_info *sta; |
1104 | |
1105 | rcu_read_lock(); |
1106 | |
1107 | sta = sta_info_get_by_addrs(local, sta_addr: hdr->addr1, vif_addr: hdr->addr2); |
1108 | if (sta) |
1109 | status.sta = &sta->sta; |
1110 | |
1111 | ieee80211_tx_status_ext(hw, status: &status); |
1112 | rcu_read_unlock(); |
1113 | } |
1114 | EXPORT_SYMBOL(ieee80211_tx_status_skb); |
1115 | |
1116 | void ieee80211_tx_status_ext(struct ieee80211_hw *hw, |
1117 | struct ieee80211_tx_status *status) |
1118 | { |
1119 | struct ieee80211_local *local = hw_to_local(hw); |
1120 | struct ieee80211_tx_info *info = status->info; |
1121 | struct ieee80211_sta *pubsta = status->sta; |
1122 | struct sk_buff *skb = status->skb; |
1123 | struct sta_info *sta = NULL; |
1124 | int rates_idx, retry_count; |
1125 | bool acked, noack_success, ack_signal_valid; |
1126 | u16 tx_time_est; |
1127 | |
1128 | if (pubsta) { |
1129 | sta = container_of(pubsta, struct sta_info, sta); |
1130 | |
1131 | if (status->n_rates) |
1132 | sta->deflink.tx_stats.last_rate_info = |
1133 | status->rates[status->n_rates - 1].rate_idx; |
1134 | } |
1135 | |
1136 | if (skb && (tx_time_est = |
1137 | ieee80211_info_get_tx_time_est(info: IEEE80211_SKB_CB(skb))) > 0) { |
1138 | /* Do this here to avoid the expensive lookup of the sta |
1139 | * in ieee80211_report_used_skb(). |
1140 | */ |
1141 | ieee80211_sta_update_pending_airtime(local, sta, |
1142 | ac: skb_get_queue_mapping(skb), |
1143 | tx_airtime: tx_time_est, |
1144 | tx_completed: true); |
1145 | ieee80211_info_set_tx_time_est(info: IEEE80211_SKB_CB(skb), tx_time_est: 0); |
1146 | } |
1147 | |
1148 | if (!status->info) |
1149 | goto free; |
1150 | |
1151 | rates_idx = ieee80211_tx_get_rates(hw, info, retry_count: &retry_count); |
1152 | |
1153 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
1154 | noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); |
1155 | ack_signal_valid = |
1156 | !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); |
1157 | |
1158 | if (pubsta) { |
1159 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
1160 | |
1161 | if (!acked && !noack_success) |
1162 | sta->deflink.status_stats.retry_failed++; |
1163 | sta->deflink.status_stats.retry_count += retry_count; |
1164 | |
1165 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
1166 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1167 | skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) |
1168 | ieee80211_sta_tx_notify(sdata, hdr: (void *) skb->data, |
1169 | ack: acked, tx_time: info->status.tx_time); |
1170 | |
1171 | if (acked) { |
1172 | sta->deflink.status_stats.last_ack = jiffies; |
1173 | |
1174 | if (sta->deflink.status_stats.lost_packets) |
1175 | sta->deflink.status_stats.lost_packets = 0; |
1176 | |
1177 | /* Track when last packet was ACKed */ |
1178 | sta->deflink.status_stats.last_pkt_time = jiffies; |
1179 | |
1180 | /* Reset connection monitor */ |
1181 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1182 | unlikely(sdata->u.mgd.probe_send_count > 0)) |
1183 | sdata->u.mgd.probe_send_count = 0; |
1184 | |
1185 | if (ack_signal_valid) { |
1186 | sta->deflink.status_stats.last_ack_signal = |
1187 | (s8)info->status.ack_signal; |
1188 | sta->deflink.status_stats.ack_signal_filled = true; |
1189 | ewma_avg_signal_add(e: &sta->deflink.status_stats.avg_ack_signal, |
1190 | val: -info->status.ack_signal); |
1191 | } |
1192 | } else if (test_sta_flag(sta, flag: WLAN_STA_PS_STA)) { |
1193 | /* |
1194 | * The STA is in power save mode, so assume |
1195 | * that this TX packet failed because of that. |
1196 | */ |
1197 | if (skb) |
1198 | ieee80211_handle_filtered_frame(local, sta, skb); |
1199 | return; |
1200 | } else if (noack_success) { |
1201 | /* nothing to do here, do not account as lost */ |
1202 | } else { |
1203 | ieee80211_lost_packet(sta, info); |
1204 | } |
1205 | } |
1206 | |
1207 | rate_control_tx_status(local, st: status); |
1208 | if (ieee80211_vif_is_mesh(vif: &sta->sdata->vif)) |
1209 | ieee80211s_update_metric(local, sta, st: status); |
1210 | } |
1211 | |
1212 | if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) |
1213 | return __ieee80211_tx_status(hw, status, rates_idx, |
1214 | retry_count); |
1215 | |
1216 | if (acked || noack_success) { |
1217 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
1218 | if (!pubsta) |
1219 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
1220 | if (retry_count > 0) |
1221 | I802_DEBUG_INC(local->dot11RetryCount); |
1222 | if (retry_count > 1) |
1223 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
1224 | } else { |
1225 | I802_DEBUG_INC(local->dot11FailedCount); |
1226 | } |
1227 | |
1228 | free: |
1229 | if (!skb) |
1230 | return; |
1231 | |
1232 | ieee80211_report_used_skb(local, skb, dropped: false, ack_hwtstamp: status->ack_hwtstamp); |
1233 | if (status->free_list) |
1234 | list_add_tail(new: &skb->list, head: status->free_list); |
1235 | else |
1236 | dev_kfree_skb(skb); |
1237 | } |
1238 | EXPORT_SYMBOL(ieee80211_tx_status_ext); |
1239 | |
1240 | void ieee80211_tx_rate_update(struct ieee80211_hw *hw, |
1241 | struct ieee80211_sta *pubsta, |
1242 | struct ieee80211_tx_info *info) |
1243 | { |
1244 | struct ieee80211_local *local = hw_to_local(hw); |
1245 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
1246 | struct ieee80211_tx_status status = { |
1247 | .info = info, |
1248 | .sta = pubsta, |
1249 | }; |
1250 | |
1251 | rate_control_tx_status(local, st: &status); |
1252 | |
1253 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) |
1254 | sta->deflink.tx_stats.last_rate = info->status.rates[0]; |
1255 | } |
1256 | EXPORT_SYMBOL(ieee80211_tx_rate_update); |
1257 | |
1258 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
1259 | { |
1260 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
1261 | cfg80211_cqm_pktloss_notify(dev: sta->sdata->dev, peer: sta->sta.addr, |
1262 | num_packets, GFP_ATOMIC); |
1263 | } |
1264 | EXPORT_SYMBOL(ieee80211_report_low_ack); |
1265 | |
1266 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) |
1267 | { |
1268 | struct ieee80211_local *local = hw_to_local(hw); |
1269 | ktime_t kt = ktime_set(secs: 0, nsecs: 0); |
1270 | |
1271 | ieee80211_report_used_skb(local, skb, dropped: true, ack_hwtstamp: kt); |
1272 | dev_kfree_skb_any(skb); |
1273 | } |
1274 | EXPORT_SYMBOL(ieee80211_free_txskb); |
1275 | |
1276 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, |
1277 | struct sk_buff_head *skbs) |
1278 | { |
1279 | struct sk_buff *skb; |
1280 | |
1281 | while ((skb = __skb_dequeue(list: skbs))) |
1282 | ieee80211_free_txskb(hw, skb); |
1283 | } |
1284 | |