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 "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
160 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
161 txqi = to_txq_info(sta->sta.txq[i]);
162 p += scnprintf(p, bufsz+buf-p,
163 "%d %d %u %u %u %u %u %u %u %u %u\n",
166 txqi->tin.backlog_bytes,
167 txqi->tin.backlog_packets,
169 txqi->cstats.drop_count,
170 txqi->cstats.ecn_mark,
172 txqi->tin.collisions,
174 txqi->tin.tx_packets);
178 spin_unlock_bh(&local->fq.lock);
180 rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
186 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
187 size_t count, loff_t *ppos)
189 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
191 struct sta_info *sta = file->private_data;
192 struct tid_ampdu_rx *tid_rx;
193 struct tid_ampdu_tx *tid_tx;
197 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
198 sta->ampdu_mlme.dialog_token_allocator + 1);
199 p += scnprintf(p, sizeof(buf) + buf - p,
200 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
202 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
203 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
204 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
206 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
207 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
208 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
209 tid_rx ? sta->ampdu_mlme.tid_rx_token[i] : 0);
210 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
211 tid_rx ? tid_rx->ssn : 0);
213 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
214 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
215 tid_tx ? tid_tx->dialog_token : 0);
216 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
217 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
218 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
222 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
225 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
226 size_t count, loff_t *ppos)
228 char _buf[25] = {}, *buf = _buf;
229 struct sta_info *sta = file->private_data;
233 int ret, timeout = 5000;
235 if (count > sizeof(_buf))
238 if (copy_from_user(buf, userbuf, count))
241 buf[sizeof(_buf) - 1] = '\0';
243 buf = strsep(&pos, " ");
247 if (!strcmp(buf, "tx"))
249 else if (!strcmp(buf, "rx"))
254 buf = strsep(&pos, " ");
257 if (!strcmp(buf, "start")) {
261 } else if (!strcmp(buf, "stop")) {
267 buf = strsep(&pos, " ");
270 if (sscanf(buf, "timeout=%d", &timeout) == 1) {
271 buf = strsep(&pos, " ");
272 if (!buf || !tx || !start)
276 ret = kstrtoul(buf, 0, &tid);
277 if (ret || tid >= IEEE80211_NUM_TIDS)
282 ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
285 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
287 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
294 STA_OPS_RW(agg_status);
296 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
297 size_t count, loff_t *ppos)
299 #define PRINT_HT_CAP(_cond, _str) \
302 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
304 char buf[512], *p = buf;
306 struct sta_info *sta = file->private_data;
307 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
309 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
310 htc->ht_supported ? "" : "not ");
311 if (htc->ht_supported) {
312 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
314 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
315 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
316 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
318 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
319 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
320 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
322 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
323 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
324 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
325 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
327 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
328 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
329 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
330 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
332 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
334 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
336 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
340 * For beacons and probe response this would mean the BSS
341 * does or does not allow the usage of DSSS/CCK HT40.
342 * Otherwise it means the STA does or does not use
345 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
346 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
348 /* BIT(13) is reserved */
350 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
352 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
354 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
355 htc->ampdu_factor, htc->ampdu_density);
356 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
358 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
359 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
360 htc->mcs.rx_mask[i]);
361 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
363 /* If not set this is meaningless */
364 if (le16_to_cpu(htc->mcs.rx_highest)) {
365 p += scnprintf(p, sizeof(buf)+buf-p,
366 "MCS rx highest: %d Mbps\n",
367 le16_to_cpu(htc->mcs.rx_highest));
370 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
374 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
378 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
379 size_t count, loff_t *ppos)
381 char buf[512], *p = buf;
382 struct sta_info *sta = file->private_data;
383 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
385 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
386 vhtc->vht_supported ? "" : "not ");
387 if (vhtc->vht_supported) {
388 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
390 #define PFLAG(a, b) \
392 if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
393 p += scnprintf(p, sizeof(buf) + buf - p, \
397 switch (vhtc->cap & 0x3) {
398 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
399 p += scnprintf(p, sizeof(buf) + buf - p,
400 "\t\tMAX-MPDU-3895\n");
402 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
403 p += scnprintf(p, sizeof(buf) + buf - p,
404 "\t\tMAX-MPDU-7991\n");
406 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
407 p += scnprintf(p, sizeof(buf) + buf - p,
408 "\t\tMAX-MPDU-11454\n");
411 p += scnprintf(p, sizeof(buf) + buf - p,
412 "\t\tMAX-MPDU-UNKNOWN\n");
414 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
416 p += scnprintf(p, sizeof(buf) + buf - p,
419 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
420 p += scnprintf(p, sizeof(buf) + buf - p,
423 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
424 p += scnprintf(p, sizeof(buf) + buf - p,
428 p += scnprintf(p, sizeof(buf) + buf - p,
429 "\t\tUNKNOWN-MHZ: 0x%x\n",
430 (vhtc->cap >> 2) & 0x3);
432 PFLAG(RXLDPC, "RXLDPC");
433 PFLAG(SHORT_GI_80, "SHORT-GI-80");
434 PFLAG(SHORT_GI_160, "SHORT-GI-160");
435 PFLAG(TXSTBC, "TXSTBC");
436 p += scnprintf(p, sizeof(buf) + buf - p,
437 "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
438 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
439 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
440 p += scnprintf(p, sizeof(buf) + buf - p,
441 "\t\tBEAMFORMEE-STS: 0x%x\n",
442 (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
443 IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
444 p += scnprintf(p, sizeof(buf) + buf - p,
445 "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
446 (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
447 >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
448 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
449 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
450 PFLAG(VHT_TXOP_PS, "TXOP-PS");
451 PFLAG(HTC_VHT, "HTC-VHT");
452 p += scnprintf(p, sizeof(buf) + buf - p,
453 "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
454 (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
455 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
456 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
457 "LINK-ADAPTATION-VHT-UNSOL-MFB");
458 p += scnprintf(p, sizeof(buf) + buf - p,
459 "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
460 (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
461 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
462 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
464 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
465 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
466 if (vhtc->vht_mcs.rx_highest)
467 p += scnprintf(p, sizeof(buf)+buf-p,
468 "MCS RX highest: %d Mbps\n",
469 le16_to_cpu(vhtc->vht_mcs.rx_highest));
470 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
471 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
472 if (vhtc->vht_mcs.tx_highest)
473 p += scnprintf(p, sizeof(buf)+buf-p,
474 "MCS TX highest: %d Mbps\n",
475 le16_to_cpu(vhtc->vht_mcs.tx_highest));
478 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
483 #define DEBUGFS_ADD(name) \
484 debugfs_create_file(#name, 0400, \
485 sta->debugfs_dir, sta, &sta_ ##name## _ops);
487 #define DEBUGFS_ADD_COUNTER(name, field) \
488 if (sizeof(sta->field) == sizeof(u32)) \
489 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
490 (u32 *) &sta->field); \
492 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
493 (u64 *) &sta->field);
495 void ieee80211_sta_debugfs_add(struct sta_info *sta)
497 struct ieee80211_local *local = sta->local;
498 struct ieee80211_sub_if_data *sdata = sta->sdata;
499 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
505 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
508 * This might fail due to a race condition:
509 * When mac80211 unlinks a station, the debugfs entries
510 * remain, but it is already possible to link a new
511 * station with the same address which triggers adding
512 * it to debugfs; therefore, if the old station isn't
513 * destroyed quickly enough the old station's debugfs
514 * dir might still be around.
516 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
517 if (!sta->debugfs_dir)
521 DEBUGFS_ADD(num_ps_buf_frames);
522 DEBUGFS_ADD(last_seq_ctrl);
523 DEBUGFS_ADD(agg_status);
524 DEBUGFS_ADD(ht_capa);
525 DEBUGFS_ADD(vht_capa);
527 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
528 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
529 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
531 if (local->ops->wake_tx_queue)
534 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
535 debugfs_create_x32("driver_buffered_tids", 0400,
537 (u32 *)&sta->driver_buffered_tids);
539 debugfs_create_x64("driver_buffered_tids", 0400,
541 (u64 *)&sta->driver_buffered_tids);
543 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
546 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
548 debugfs_remove_recursive(sta->debugfs_dir);
549 sta->debugfs_dir = NULL;