Merge commit 'v2.6.35-rc1' into amd-iommu/2.6.35
[linux-drm-fsl-dcu.git] / net / mac80211 / debugfs_sta.c
1 /*
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  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <linux/debugfs.h>
12 #include <linux/ieee80211.h>
13 #include "ieee80211_i.h"
14 #include "debugfs.h"
15 #include "debugfs_sta.h"
16 #include "sta_info.h"
17
18 /* sta attributtes */
19
20 #define STA_READ(name, buflen, field, format_string)                    \
21 static ssize_t sta_ ##name## _read(struct file *file,                   \
22                                    char __user *userbuf,                \
23                                    size_t count, loff_t *ppos)          \
24 {                                                                       \
25         int res;                                                        \
26         struct sta_info *sta = file->private_data;                      \
27         char buf[buflen];                                               \
28         res = scnprintf(buf, buflen, format_string, sta->field);        \
29         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
30 }
31 #define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n")
32 #define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n")
33 #define STA_READ_LU(name, field) STA_READ(name, 20, field, "%lu\n")
34 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
35
36 #define STA_OPS(name)                                                   \
37 static const struct file_operations sta_ ##name## _ops = {              \
38         .read = sta_##name##_read,                                      \
39         .open = mac80211_open_file_generic,                             \
40 }
41
42 #define STA_OPS_RW(name)                                                \
43 static const struct file_operations sta_ ##name## _ops = {              \
44         .read = sta_##name##_read,                                      \
45         .write = sta_##name##_write,                                    \
46         .open = mac80211_open_file_generic,                             \
47 }
48
49 #define STA_FILE(name, field, format)                                   \
50                 STA_READ_##format(name, field)                          \
51                 STA_OPS(name)
52
53 STA_FILE(aid, sta.aid, D);
54 STA_FILE(dev, sdata->name, S);
55 STA_FILE(rx_packets, rx_packets, LU);
56 STA_FILE(tx_packets, tx_packets, LU);
57 STA_FILE(rx_bytes, rx_bytes, LU);
58 STA_FILE(tx_bytes, tx_bytes, LU);
59 STA_FILE(rx_duplicates, num_duplicates, LU);
60 STA_FILE(rx_fragments, rx_fragments, LU);
61 STA_FILE(rx_dropped, rx_dropped, LU);
62 STA_FILE(tx_fragments, tx_fragments, LU);
63 STA_FILE(tx_filtered, tx_filtered_count, LU);
64 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
65 STA_FILE(tx_retry_count, tx_retry_count, LU);
66 STA_FILE(last_signal, last_signal, D);
67 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
68
69 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
70                               size_t count, loff_t *ppos)
71 {
72         char buf[100];
73         struct sta_info *sta = file->private_data;
74         u32 staflags = get_sta_flags(sta);
75         int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
76                 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
77                 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
78                 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
79                 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
80                 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
81                 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
82                 staflags & WLAN_STA_WME ? "WME\n" : "",
83                 staflags & WLAN_STA_WDS ? "WDS\n" : "",
84                 staflags & WLAN_STA_MFP ? "MFP\n" : "");
85         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
86 }
87 STA_OPS(flags);
88
89 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
90                                           char __user *userbuf,
91                                           size_t count, loff_t *ppos)
92 {
93         char buf[20];
94         struct sta_info *sta = file->private_data;
95         int res = scnprintf(buf, sizeof(buf), "%u\n",
96                             skb_queue_len(&sta->ps_tx_buf));
97         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
98 }
99 STA_OPS(num_ps_buf_frames);
100
101 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
102                                     size_t count, loff_t *ppos)
103 {
104         char buf[20];
105         struct sta_info *sta = file->private_data;
106         int res = scnprintf(buf, sizeof(buf), "%d\n",
107                             jiffies_to_msecs(jiffies - sta->last_rx));
108         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
109 }
110 STA_OPS(inactive_ms);
111
112 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
113                                       size_t count, loff_t *ppos)
114 {
115         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
116         int i;
117         struct sta_info *sta = file->private_data;
118         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
119                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
120                                le16_to_cpu(sta->last_seq_ctrl[i]));
121         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
122         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
123 }
124 STA_OPS(last_seq_ctrl);
125
126 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
127                                         size_t count, loff_t *ppos)
128 {
129         char buf[71 + STA_TID_NUM * 40], *p = buf;
130         int i;
131         struct sta_info *sta = file->private_data;
132
133         spin_lock_bh(&sta->lock);
134         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
135                         sta->ampdu_mlme.dialog_token_allocator + 1);
136         p += scnprintf(p, sizeof(buf) + buf - p,
137                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tSSN\tpending\n");
138         for (i = 0; i < STA_TID_NUM; i++) {
139                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
140                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
141                                 sta->ampdu_mlme.tid_active_rx[i]);
142                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
143                                 sta->ampdu_mlme.tid_active_rx[i] ?
144                                 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
145                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
146                                 sta->ampdu_mlme.tid_active_rx[i] ?
147                                 sta->ampdu_mlme.tid_rx[i]->ssn : 0);
148
149                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
150                                 sta->ampdu_mlme.tid_state_tx[i]);
151                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
152                                 sta->ampdu_mlme.tid_state_tx[i] ?
153                                 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
154                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
155                                 sta->ampdu_mlme.tid_state_tx[i] ?
156                                 sta->ampdu_mlme.tid_tx[i]->ssn : 0);
157                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
158                                 sta->ampdu_mlme.tid_state_tx[i] ?
159                                 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0);
160                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
161         }
162         spin_unlock_bh(&sta->lock);
163
164         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
165 }
166
167 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
168                                     size_t count, loff_t *ppos)
169 {
170         char _buf[12], *buf = _buf;
171         struct sta_info *sta = file->private_data;
172         bool start, tx;
173         unsigned long tid;
174         int ret;
175
176         if (count > sizeof(_buf))
177                 return -EINVAL;
178
179         if (copy_from_user(buf, userbuf, count))
180                 return -EFAULT;
181
182         buf[sizeof(_buf) - 1] = '\0';
183
184         if (strncmp(buf, "tx ", 3) == 0) {
185                 buf += 3;
186                 tx = true;
187         } else if (strncmp(buf, "rx ", 3) == 0) {
188                 buf += 3;
189                 tx = false;
190         } else
191                 return -EINVAL;
192
193         if (strncmp(buf, "start ", 6) == 0) {
194                 buf += 6;
195                 start = true;
196                 if (!tx)
197                         return -EINVAL;
198         } else if (strncmp(buf, "stop ", 5) == 0) {
199                 buf += 5;
200                 start = false;
201         } else
202                 return -EINVAL;
203
204         tid = simple_strtoul(buf, NULL, 0);
205
206         if (tid >= STA_TID_NUM)
207                 return -EINVAL;
208
209         if (tx) {
210                 if (start)
211                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid);
212                 else
213                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid,
214                                                            WLAN_BACK_RECIPIENT);
215         } else {
216                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3);
217                 ret = 0;
218         }
219
220         return ret ?: count;
221 }
222 STA_OPS_RW(agg_status);
223
224 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
225                                 size_t count, loff_t *ppos)
226 {
227 #define PRINT_HT_CAP(_cond, _str) \
228         do { \
229         if (_cond) \
230                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
231         } while (0)
232         char buf[512], *p = buf;
233         int i;
234         struct sta_info *sta = file->private_data;
235         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
236
237         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
238                         htc->ht_supported ? "" : "not ");
239         if (htc->ht_supported) {
240                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
241
242                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
243                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
244                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
245
246                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
247                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
248                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
249
250                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
251                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
252                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
253                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
254
255                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
256                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
257                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
258                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
259
260                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
261
262                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
263                              "3839 bytes");
264                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
265                              "7935 bytes");
266
267                 /*
268                  * For beacons and probe response this would mean the BSS
269                  * does or does not allow the usage of DSSS/CCK HT40.
270                  * Otherwise it means the STA does or does not use
271                  * DSSS/CCK HT40.
272                  */
273                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
274                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
275
276                 /* BIT(13) is reserved */
277
278                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
279
280                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
281
282                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
283                                 htc->ampdu_factor, htc->ampdu_density);
284                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
285
286                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
287                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
288                                         htc->mcs.rx_mask[i]);
289                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
290
291                 /* If not set this is meaningless */
292                 if (le16_to_cpu(htc->mcs.rx_highest)) {
293                         p += scnprintf(p, sizeof(buf)+buf-p,
294                                        "MCS rx highest: %d Mbps\n",
295                                        le16_to_cpu(htc->mcs.rx_highest));
296                 }
297
298                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
299                                 htc->mcs.tx_params);
300         }
301
302         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
303 }
304 STA_OPS(ht_capa);
305
306 #define DEBUGFS_ADD(name) \
307         debugfs_create_file(#name, 0400, \
308                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
309
310
311 void ieee80211_sta_debugfs_add(struct sta_info *sta)
312 {
313         struct dentry *stations_dir = sta->local->debugfs.stations;
314         u8 mac[3*ETH_ALEN];
315
316         sta->debugfs.add_has_run = true;
317
318         if (!stations_dir)
319                 return;
320
321         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
322
323         /*
324          * This might fail due to a race condition:
325          * When mac80211 unlinks a station, the debugfs entries
326          * remain, but it is already possible to link a new
327          * station with the same address which triggers adding
328          * it to debugfs; therefore, if the old station isn't
329          * destroyed quickly enough the old station's debugfs
330          * dir might still be around.
331          */
332         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
333         if (!sta->debugfs.dir)
334                 return;
335
336         DEBUGFS_ADD(flags);
337         DEBUGFS_ADD(num_ps_buf_frames);
338         DEBUGFS_ADD(inactive_ms);
339         DEBUGFS_ADD(last_seq_ctrl);
340         DEBUGFS_ADD(agg_status);
341         DEBUGFS_ADD(dev);
342         DEBUGFS_ADD(rx_packets);
343         DEBUGFS_ADD(tx_packets);
344         DEBUGFS_ADD(rx_bytes);
345         DEBUGFS_ADD(tx_bytes);
346         DEBUGFS_ADD(rx_duplicates);
347         DEBUGFS_ADD(rx_fragments);
348         DEBUGFS_ADD(rx_dropped);
349         DEBUGFS_ADD(tx_fragments);
350         DEBUGFS_ADD(tx_filtered);
351         DEBUGFS_ADD(tx_retry_failed);
352         DEBUGFS_ADD(tx_retry_count);
353         DEBUGFS_ADD(last_signal);
354         DEBUGFS_ADD(wep_weak_iv_count);
355         DEBUGFS_ADD(ht_capa);
356 }
357
358 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
359 {
360         debugfs_remove_recursive(sta->debugfs.dir);
361         sta->debugfs.dir = NULL;
362 }