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),
83 FLAG(USES_ENCRYPTION),
87 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
88 size_t count, loff_t *ppos)
90 char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
91 char *end = buf + sizeof(buf) - 1;
92 struct sta_info *sta = file->private_data;
95 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
97 for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
98 if (test_sta_flag(sta, flg))
99 pos += scnprintf(pos, end - pos, "%s\n",
100 sta_flag_names[flg]);
103 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
107 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
108 char __user *userbuf,
109 size_t count, loff_t *ppos)
111 struct sta_info *sta = file->private_data;
112 char buf[17*IEEE80211_NUM_ACS], *p = buf;
115 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
116 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
117 skb_queue_len(&sta->ps_tx_buf[ac]) +
118 skb_queue_len(&sta->tx_filtered[ac]));
119 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
121 STA_OPS(num_ps_buf_frames);
123 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
124 size_t count, loff_t *ppos)
126 char buf[15*IEEE80211_NUM_TIDS], *p = buf;
128 struct sta_info *sta = file->private_data;
129 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
130 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
131 le16_to_cpu(sta->last_seq_ctrl[i]));
132 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
133 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
135 STA_OPS(last_seq_ctrl);
137 #define AQM_TXQ_ENTRY_LEN 130
139 static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
140 size_t count, loff_t *ppos)
142 struct sta_info *sta = file->private_data;
143 struct ieee80211_local *local = sta->local;
144 size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
145 char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
146 struct txq_info *txqi;
153 spin_lock_bh(&local->fq.lock);
158 "target %uus interval %uus ecn %s\n",
159 codel_time_to_us(sta->cparams.target),
160 codel_time_to_us(sta->cparams.interval),
161 sta->cparams.ecn ? "yes" : "no");
164 "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets flags\n");
166 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
167 txqi = to_txq_info(sta->sta.txq[i]);
168 p += scnprintf(p, bufsz+buf-p,
169 "%d %d %u %u %u %u %u %u %u %u %u 0x%lx(%s%s%s)\n",
172 txqi->tin.backlog_bytes,
173 txqi->tin.backlog_packets,
175 txqi->cstats.drop_count,
176 txqi->cstats.ecn_mark,
178 txqi->tin.collisions,
180 txqi->tin.tx_packets,
182 txqi->flags & (1<<IEEE80211_TXQ_STOP) ? "STOP" : "RUN",
183 txqi->flags & (1<<IEEE80211_TXQ_AMPDU) ? " AMPDU" : "",
184 txqi->flags & (1<<IEEE80211_TXQ_NO_AMSDU) ? " NO-AMSDU" : "");
188 spin_unlock_bh(&local->fq.lock);
190 rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
196 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
197 size_t count, loff_t *ppos)
199 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
201 struct sta_info *sta = file->private_data;
202 struct tid_ampdu_rx *tid_rx;
203 struct tid_ampdu_tx *tid_tx;
207 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
208 sta->ampdu_mlme.dialog_token_allocator + 1);
209 p += scnprintf(p, sizeof(buf) + buf - p,
210 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
212 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
215 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
216 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
217 tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
219 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
220 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
222 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
224 sta->ampdu_mlme.tid_rx_token[i] : 0);
225 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
226 tid_rx ? tid_rx->ssn : 0);
228 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
229 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
230 tid_tx ? tid_tx->dialog_token : 0);
231 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
232 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
233 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
237 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
240 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
241 size_t count, loff_t *ppos)
243 char _buf[25] = {}, *buf = _buf;
244 struct sta_info *sta = file->private_data;
248 int ret, timeout = 5000;
250 if (count > sizeof(_buf))
253 if (copy_from_user(buf, userbuf, count))
256 buf[sizeof(_buf) - 1] = '\0';
258 buf = strsep(&pos, " ");
262 if (!strcmp(buf, "tx"))
264 else if (!strcmp(buf, "rx"))
269 buf = strsep(&pos, " ");
272 if (!strcmp(buf, "start")) {
276 } else if (!strcmp(buf, "stop")) {
282 buf = strsep(&pos, " ");
285 if (sscanf(buf, "timeout=%d", &timeout) == 1) {
286 buf = strsep(&pos, " ");
287 if (!buf || !tx || !start)
291 ret = kstrtoul(buf, 0, &tid);
292 if (ret || tid >= IEEE80211_NUM_TIDS)
297 ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
300 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
302 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
309 STA_OPS_RW(agg_status);
311 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
312 size_t count, loff_t *ppos)
314 #define PRINT_HT_CAP(_cond, _str) \
317 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
319 char buf[512], *p = buf;
321 struct sta_info *sta = file->private_data;
322 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
324 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
325 htc->ht_supported ? "" : "not ");
326 if (htc->ht_supported) {
327 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
329 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
330 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
331 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
333 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
334 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
335 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
337 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
338 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
339 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
340 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
342 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
343 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
344 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
345 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
347 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
349 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
351 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
355 * For beacons and probe response this would mean the BSS
356 * does or does not allow the usage of DSSS/CCK HT40.
357 * Otherwise it means the STA does or does not use
360 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
361 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
363 /* BIT(13) is reserved */
365 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
367 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
369 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
370 htc->ampdu_factor, htc->ampdu_density);
371 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
373 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
374 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
375 htc->mcs.rx_mask[i]);
376 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
378 /* If not set this is meaningless */
379 if (le16_to_cpu(htc->mcs.rx_highest)) {
380 p += scnprintf(p, sizeof(buf)+buf-p,
381 "MCS rx highest: %d Mbps\n",
382 le16_to_cpu(htc->mcs.rx_highest));
385 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
389 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
393 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
394 size_t count, loff_t *ppos)
396 char buf[512], *p = buf;
397 struct sta_info *sta = file->private_data;
398 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
400 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
401 vhtc->vht_supported ? "" : "not ");
402 if (vhtc->vht_supported) {
403 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
405 #define PFLAG(a, b) \
407 if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
408 p += scnprintf(p, sizeof(buf) + buf - p, \
412 switch (vhtc->cap & 0x3) {
413 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
414 p += scnprintf(p, sizeof(buf) + buf - p,
415 "\t\tMAX-MPDU-3895\n");
417 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
418 p += scnprintf(p, sizeof(buf) + buf - p,
419 "\t\tMAX-MPDU-7991\n");
421 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
422 p += scnprintf(p, sizeof(buf) + buf - p,
423 "\t\tMAX-MPDU-11454\n");
426 p += scnprintf(p, sizeof(buf) + buf - p,
427 "\t\tMAX-MPDU-UNKNOWN\n");
429 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
431 p += scnprintf(p, sizeof(buf) + buf - p,
434 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
435 p += scnprintf(p, sizeof(buf) + buf - p,
438 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
439 p += scnprintf(p, sizeof(buf) + buf - p,
443 p += scnprintf(p, sizeof(buf) + buf - p,
444 "\t\tUNKNOWN-MHZ: 0x%x\n",
445 (vhtc->cap >> 2) & 0x3);
447 PFLAG(RXLDPC, "RXLDPC");
448 PFLAG(SHORT_GI_80, "SHORT-GI-80");
449 PFLAG(SHORT_GI_160, "SHORT-GI-160");
450 PFLAG(TXSTBC, "TXSTBC");
451 p += scnprintf(p, sizeof(buf) + buf - p,
452 "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
453 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
454 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
455 p += scnprintf(p, sizeof(buf) + buf - p,
456 "\t\tBEAMFORMEE-STS: 0x%x\n",
457 (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
458 IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
459 p += scnprintf(p, sizeof(buf) + buf - p,
460 "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
461 (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
462 >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
463 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
464 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
465 PFLAG(VHT_TXOP_PS, "TXOP-PS");
466 PFLAG(HTC_VHT, "HTC-VHT");
467 p += scnprintf(p, sizeof(buf) + buf - p,
468 "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
469 (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
470 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
471 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
472 "LINK-ADAPTATION-VHT-UNSOL-MFB");
473 p += scnprintf(p, sizeof(buf) + buf - p,
474 "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
475 (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
476 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
477 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
479 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
480 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
481 if (vhtc->vht_mcs.rx_highest)
482 p += scnprintf(p, sizeof(buf)+buf-p,
483 "MCS RX highest: %d Mbps\n",
484 le16_to_cpu(vhtc->vht_mcs.rx_highest));
485 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
486 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
487 if (vhtc->vht_mcs.tx_highest)
488 p += scnprintf(p, sizeof(buf)+buf-p,
489 "MCS TX highest: %d Mbps\n",
490 le16_to_cpu(vhtc->vht_mcs.tx_highest));
493 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
498 #define DEBUGFS_ADD(name) \
499 debugfs_create_file(#name, 0400, \
500 sta->debugfs_dir, sta, &sta_ ##name## _ops);
502 #define DEBUGFS_ADD_COUNTER(name, field) \
503 if (sizeof(sta->field) == sizeof(u32)) \
504 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
505 (u32 *) &sta->field); \
507 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
508 (u64 *) &sta->field);
510 void ieee80211_sta_debugfs_add(struct sta_info *sta)
512 struct ieee80211_local *local = sta->local;
513 struct ieee80211_sub_if_data *sdata = sta->sdata;
514 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
520 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
523 * This might fail due to a race condition:
524 * When mac80211 unlinks a station, the debugfs entries
525 * remain, but it is already possible to link a new
526 * station with the same address which triggers adding
527 * it to debugfs; therefore, if the old station isn't
528 * destroyed quickly enough the old station's debugfs
529 * dir might still be around.
531 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
532 if (!sta->debugfs_dir)
537 DEBUGFS_ADD(num_ps_buf_frames);
538 DEBUGFS_ADD(last_seq_ctrl);
539 DEBUGFS_ADD(agg_status);
540 DEBUGFS_ADD(ht_capa);
541 DEBUGFS_ADD(vht_capa);
543 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
544 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
545 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
547 if (local->ops->wake_tx_queue)
550 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
551 debugfs_create_x32("driver_buffered_tids", 0400,
553 (u32 *)&sta->driver_buffered_tids);
555 debugfs_create_x64("driver_buffered_tids", 0400,
557 (u64 *)&sta->driver_buffered_tids);
559 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
562 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
564 debugfs_remove_recursive(sta->debugfs_dir);
565 sta->debugfs_dir = NULL;