2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright(c) 2016 Intel Deutschland GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/debugfs.h>
14 #include <linux/ieee80211.h>
15 #include "ieee80211_i.h"
17 #include "debugfs_sta.h"
19 #include "driver-ops.h"
23 #define STA_READ(name, field, format_string) \
24 static ssize_t sta_ ##name## _read(struct file *file, \
25 char __user *userbuf, \
26 size_t count, loff_t *ppos) \
28 struct sta_info *sta = file->private_data; \
29 return mac80211_format_buffer(userbuf, count, ppos, \
30 format_string, sta->field); \
32 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
34 #define STA_OPS(name) \
35 static const struct file_operations sta_ ##name## _ops = { \
36 .read = sta_##name##_read, \
37 .open = simple_open, \
38 .llseek = generic_file_llseek, \
41 #define STA_OPS_RW(name) \
42 static const struct file_operations sta_ ##name## _ops = { \
43 .read = sta_##name##_read, \
44 .write = sta_##name##_write, \
45 .open = simple_open, \
46 .llseek = generic_file_llseek, \
49 #define STA_FILE(name, field, format) \
50 STA_READ_##format(name, field) \
53 STA_FILE(aid
, sta
.aid
, D
);
55 static const char * const sta_flag_names
[] = {
56 #define FLAG(F) [WLAN_STA_##F] = #F
71 FLAG(TDLS_CHAN_SWITCH
),
72 FLAG(TDLS_OFF_CHANNEL
),
86 static ssize_t
sta_flags_read(struct file
*file
, char __user
*userbuf
,
87 size_t count
, loff_t
*ppos
)
89 char buf
[16 * NUM_WLAN_STA_FLAGS
], *pos
= buf
;
90 char *end
= buf
+ sizeof(buf
) - 1;
91 struct sta_info
*sta
= file
->private_data
;
94 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names
) != NUM_WLAN_STA_FLAGS
);
96 for (flg
= 0; flg
< NUM_WLAN_STA_FLAGS
; flg
++) {
97 if (test_sta_flag(sta
, flg
))
98 pos
+= scnprintf(pos
, end
- pos
, "%s\n",
102 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, strlen(buf
));
106 static ssize_t
sta_num_ps_buf_frames_read(struct file
*file
,
107 char __user
*userbuf
,
108 size_t count
, loff_t
*ppos
)
110 struct sta_info
*sta
= file
->private_data
;
111 char buf
[17*IEEE80211_NUM_ACS
], *p
= buf
;
114 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
115 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "AC%d: %d\n", ac
,
116 skb_queue_len(&sta
->ps_tx_buf
[ac
]) +
117 skb_queue_len(&sta
->tx_filtered
[ac
]));
118 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
120 STA_OPS(num_ps_buf_frames
);
122 static ssize_t
sta_last_seq_ctrl_read(struct file
*file
, char __user
*userbuf
,
123 size_t count
, loff_t
*ppos
)
125 char buf
[15*IEEE80211_NUM_TIDS
], *p
= buf
;
127 struct sta_info
*sta
= file
->private_data
;
128 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
129 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "%x ",
130 le16_to_cpu(sta
->last_seq_ctrl
[i
]));
131 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
132 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
134 STA_OPS(last_seq_ctrl
);
136 #define AQM_TXQ_ENTRY_LEN 130
138 static ssize_t
sta_aqm_read(struct file
*file
, char __user
*userbuf
,
139 size_t count
, loff_t
*ppos
)
141 struct sta_info
*sta
= file
->private_data
;
142 struct ieee80211_local
*local
= sta
->local
;
143 size_t bufsz
= AQM_TXQ_ENTRY_LEN
*(IEEE80211_NUM_TIDS
+1);
144 char *buf
= kzalloc(bufsz
, GFP_KERNEL
), *p
= buf
;
145 struct txq_info
*txqi
;
152 spin_lock_bh(&local
->fq
.lock
);
157 "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
159 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
160 txqi
= to_txq_info(sta
->sta
.txq
[i
]);
161 p
+= scnprintf(p
, bufsz
+buf
-p
,
162 "%d %d %u %u %u %u %u %u %u %u %u\n",
165 txqi
->tin
.backlog_bytes
,
166 txqi
->tin
.backlog_packets
,
168 txqi
->cstats
.drop_count
,
169 txqi
->cstats
.ecn_mark
,
171 txqi
->tin
.collisions
,
173 txqi
->tin
.tx_packets
);
177 spin_unlock_bh(&local
->fq
.lock
);
179 rv
= simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
185 static ssize_t
sta_agg_status_read(struct file
*file
, char __user
*userbuf
,
186 size_t count
, loff_t
*ppos
)
188 char buf
[71 + IEEE80211_NUM_TIDS
* 40], *p
= buf
;
190 struct sta_info
*sta
= file
->private_data
;
191 struct tid_ampdu_rx
*tid_rx
;
192 struct tid_ampdu_tx
*tid_tx
;
196 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "next dialog_token: %#02x\n",
197 sta
->ampdu_mlme
.dialog_token_allocator
+ 1);
198 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
199 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
201 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
202 tid_rx
= rcu_dereference(sta
->ampdu_mlme
.tid_rx
[i
]);
203 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[i
]);
205 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "%02d", i
);
206 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t\t%x", !!tid_rx
);
207 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.2x",
208 tid_rx
? sta
->ampdu_mlme
.tid_rx_token
[i
] : 0);
209 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.3x",
210 tid_rx
? tid_rx
->ssn
: 0);
212 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t\t%x", !!tid_tx
);
213 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.2x",
214 tid_tx
? tid_tx
->dialog_token
: 0);
215 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%03d",
216 tid_tx
? skb_queue_len(&tid_tx
->pending
) : 0);
217 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\n");
221 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
224 static ssize_t
sta_agg_status_write(struct file
*file
, const char __user
*userbuf
,
225 size_t count
, loff_t
*ppos
)
227 char _buf
[25] = {}, *buf
= _buf
;
228 struct sta_info
*sta
= file
->private_data
;
232 int ret
, timeout
= 5000;
234 if (count
> sizeof(_buf
))
237 if (copy_from_user(buf
, userbuf
, count
))
240 buf
[sizeof(_buf
) - 1] = '\0';
242 buf
= strsep(&pos
, " ");
246 if (!strcmp(buf
, "tx"))
248 else if (!strcmp(buf
, "rx"))
253 buf
= strsep(&pos
, " ");
256 if (!strcmp(buf
, "start")) {
260 } else if (!strcmp(buf
, "stop")) {
266 buf
= strsep(&pos
, " ");
269 if (sscanf(buf
, "timeout=%d", &timeout
) == 1) {
270 buf
= strsep(&pos
, " ");
271 if (!buf
|| !tx
|| !start
)
275 ret
= kstrtoul(buf
, 0, &tid
);
276 if (ret
|| tid
>= IEEE80211_NUM_TIDS
)
281 ret
= ieee80211_start_tx_ba_session(&sta
->sta
, tid
,
284 ret
= ieee80211_stop_tx_ba_session(&sta
->sta
, tid
);
286 __ieee80211_stop_rx_ba_session(sta
, tid
, WLAN_BACK_RECIPIENT
,
293 STA_OPS_RW(agg_status
);
295 static ssize_t
sta_ht_capa_read(struct file
*file
, char __user
*userbuf
,
296 size_t count
, loff_t
*ppos
)
298 #define PRINT_HT_CAP(_cond, _str) \
301 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
303 char buf
[512], *p
= buf
;
305 struct sta_info
*sta
= file
->private_data
;
306 struct ieee80211_sta_ht_cap
*htc
= &sta
->sta
.ht_cap
;
308 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "ht %ssupported\n",
309 htc
->ht_supported
? "" : "not ");
310 if (htc
->ht_supported
) {
311 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "cap: %#.4x\n", htc
->cap
);
313 PRINT_HT_CAP((htc
->cap
& BIT(0)), "RX LDPC");
314 PRINT_HT_CAP((htc
->cap
& BIT(1)), "HT20/HT40");
315 PRINT_HT_CAP(!(htc
->cap
& BIT(1)), "HT20");
317 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 0, "Static SM Power Save");
318 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 1, "Dynamic SM Power Save");
319 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 3, "SM Power Save disabled");
321 PRINT_HT_CAP((htc
->cap
& BIT(4)), "RX Greenfield");
322 PRINT_HT_CAP((htc
->cap
& BIT(5)), "RX HT20 SGI");
323 PRINT_HT_CAP((htc
->cap
& BIT(6)), "RX HT40 SGI");
324 PRINT_HT_CAP((htc
->cap
& BIT(7)), "TX STBC");
326 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 0, "No RX STBC");
327 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 1, "RX STBC 1-stream");
328 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 2, "RX STBC 2-streams");
329 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 3, "RX STBC 3-streams");
331 PRINT_HT_CAP((htc
->cap
& BIT(10)), "HT Delayed Block Ack");
333 PRINT_HT_CAP(!(htc
->cap
& BIT(11)), "Max AMSDU length: "
335 PRINT_HT_CAP((htc
->cap
& BIT(11)), "Max AMSDU length: "
339 * For beacons and probe response this would mean the BSS
340 * does or does not allow the usage of DSSS/CCK HT40.
341 * Otherwise it means the STA does or does not use
344 PRINT_HT_CAP((htc
->cap
& BIT(12)), "DSSS/CCK HT40");
345 PRINT_HT_CAP(!(htc
->cap
& BIT(12)), "No DSSS/CCK HT40");
347 /* BIT(13) is reserved */
349 PRINT_HT_CAP((htc
->cap
& BIT(14)), "40 MHz Intolerant");
351 PRINT_HT_CAP((htc
->cap
& BIT(15)), "L-SIG TXOP protection");
353 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "ampdu factor/density: %d/%d\n",
354 htc
->ampdu_factor
, htc
->ampdu_density
);
355 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS mask:");
357 for (i
= 0; i
< IEEE80211_HT_MCS_MASK_LEN
; i
++)
358 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, " %.2x",
359 htc
->mcs
.rx_mask
[i
]);
360 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
362 /* If not set this is meaningless */
363 if (le16_to_cpu(htc
->mcs
.rx_highest
)) {
364 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
,
365 "MCS rx highest: %d Mbps\n",
366 le16_to_cpu(htc
->mcs
.rx_highest
));
369 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS tx params: %x\n",
373 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
377 static ssize_t
sta_vht_capa_read(struct file
*file
, char __user
*userbuf
,
378 size_t count
, loff_t
*ppos
)
380 char buf
[512], *p
= buf
;
381 struct sta_info
*sta
= file
->private_data
;
382 struct ieee80211_sta_vht_cap
*vhtc
= &sta
->sta
.vht_cap
;
384 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "VHT %ssupported\n",
385 vhtc
->vht_supported
? "" : "not ");
386 if (vhtc
->vht_supported
) {
387 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "cap: %#.8x\n",
389 #define PFLAG(a, b) \
391 if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
392 p += scnprintf(p, sizeof(buf) + buf - p, \
396 switch (vhtc
->cap
& 0x3) {
397 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895
:
398 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
399 "\t\tMAX-MPDU-3895\n");
401 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991
:
402 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
403 "\t\tMAX-MPDU-7991\n");
405 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454
:
406 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
407 "\t\tMAX-MPDU-11454\n");
410 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
411 "\t\tMAX-MPDU-UNKNOWN\n");
413 switch (vhtc
->cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
) {
415 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
418 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
:
419 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
422 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
:
423 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
427 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
428 "\t\tUNKNOWN-MHZ: 0x%x\n",
429 (vhtc
->cap
>> 2) & 0x3);
431 PFLAG(RXLDPC
, "RXLDPC");
432 PFLAG(SHORT_GI_80
, "SHORT-GI-80");
433 PFLAG(SHORT_GI_160
, "SHORT-GI-160");
434 PFLAG(TXSTBC
, "TXSTBC");
435 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
436 "\t\tRXSTBC_%d\n", (vhtc
->cap
>> 8) & 0x7);
437 PFLAG(SU_BEAMFORMER_CAPABLE
, "SU-BEAMFORMER-CAPABLE");
438 PFLAG(SU_BEAMFORMEE_CAPABLE
, "SU-BEAMFORMEE-CAPABLE");
439 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
440 "\t\tBEAMFORMEE-STS: 0x%x\n",
441 (vhtc
->cap
& IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
) >>
442 IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT
);
443 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
444 "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
445 (vhtc
->cap
& IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK
)
446 >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT
);
447 PFLAG(MU_BEAMFORMER_CAPABLE
, "MU-BEAMFORMER-CAPABLE");
448 PFLAG(MU_BEAMFORMEE_CAPABLE
, "MU-BEAMFORMEE-CAPABLE");
449 PFLAG(VHT_TXOP_PS
, "TXOP-PS");
450 PFLAG(HTC_VHT
, "HTC-VHT");
451 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
452 "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
453 (vhtc
->cap
& IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK
) >>
454 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT
);
455 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB
,
456 "LINK-ADAPTATION-VHT-UNSOL-MFB");
457 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
458 "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
459 (vhtc
->cap
& IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB
) >> 26);
460 PFLAG(RX_ANTENNA_PATTERN
, "RX-ANTENNA-PATTERN");
461 PFLAG(TX_ANTENNA_PATTERN
, "TX-ANTENNA-PATTERN");
463 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "RX MCS: %.4x\n",
464 le16_to_cpu(vhtc
->vht_mcs
.rx_mcs_map
));
465 if (vhtc
->vht_mcs
.rx_highest
)
466 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
,
467 "MCS RX highest: %d Mbps\n",
468 le16_to_cpu(vhtc
->vht_mcs
.rx_highest
));
469 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "TX MCS: %.4x\n",
470 le16_to_cpu(vhtc
->vht_mcs
.tx_mcs_map
));
471 if (vhtc
->vht_mcs
.tx_highest
)
472 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
,
473 "MCS TX highest: %d Mbps\n",
474 le16_to_cpu(vhtc
->vht_mcs
.tx_highest
));
477 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
482 #define DEBUGFS_ADD(name) \
483 debugfs_create_file(#name, 0400, \
484 sta->debugfs_dir, sta, &sta_ ##name## _ops);
486 #define DEBUGFS_ADD_COUNTER(name, field) \
487 if (sizeof(sta->field) == sizeof(u32)) \
488 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
489 (u32 *) &sta->field); \
491 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
492 (u64 *) &sta->field);
494 void ieee80211_sta_debugfs_add(struct sta_info
*sta
)
496 struct ieee80211_local
*local
= sta
->local
;
497 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
498 struct dentry
*stations_dir
= sta
->sdata
->debugfs
.subdir_stations
;
504 snprintf(mac
, sizeof(mac
), "%pM", sta
->sta
.addr
);
507 * This might fail due to a race condition:
508 * When mac80211 unlinks a station, the debugfs entries
509 * remain, but it is already possible to link a new
510 * station with the same address which triggers adding
511 * it to debugfs; therefore, if the old station isn't
512 * destroyed quickly enough the old station's debugfs
513 * dir might still be around.
515 sta
->debugfs_dir
= debugfs_create_dir(mac
, stations_dir
);
516 if (!sta
->debugfs_dir
)
520 DEBUGFS_ADD(num_ps_buf_frames
);
521 DEBUGFS_ADD(last_seq_ctrl
);
522 DEBUGFS_ADD(agg_status
);
523 DEBUGFS_ADD(ht_capa
);
524 DEBUGFS_ADD(vht_capa
);
526 DEBUGFS_ADD_COUNTER(rx_duplicates
, rx_stats
.num_duplicates
);
527 DEBUGFS_ADD_COUNTER(rx_fragments
, rx_stats
.fragments
);
528 DEBUGFS_ADD_COUNTER(tx_filtered
, status_stats
.filtered
);
530 if (local
->ops
->wake_tx_queue
)
533 if (sizeof(sta
->driver_buffered_tids
) == sizeof(u32
))
534 debugfs_create_x32("driver_buffered_tids", 0400,
536 (u32
*)&sta
->driver_buffered_tids
);
538 debugfs_create_x64("driver_buffered_tids", 0400,
540 (u64
*)&sta
->driver_buffered_tids
);
542 drv_sta_add_debugfs(local
, sdata
, &sta
->sta
, sta
->debugfs_dir
);
545 void ieee80211_sta_debugfs_remove(struct sta_info
*sta
)
547 debugfs_remove_recursive(sta
->debugfs_dir
);
548 sta
->debugfs_dir
= NULL
;