mac80211: add debugfs interface for U-APSD queue configuration
[linux-2.6.git] / net / mac80211 / debugfs.c
1
2 /*
3  * mac80211 debugfs for wireless PHYs
4  *
5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
6  *
7  * GPLv2
8  *
9  */
10
11 #include <linux/debugfs.h>
12 #include <linux/rtnetlink.h>
13 #include "ieee80211_i.h"
14 #include "driver-ops.h"
15 #include "rate.h"
16 #include "debugfs.h"
17
18 int mac80211_open_file_generic(struct inode *inode, struct file *file)
19 {
20         file->private_data = inode->i_private;
21         return 0;
22 }
23
24 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
25 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
26                             size_t count, loff_t *ppos)                 \
27 {                                                                       \
28         struct ieee80211_local *local = file->private_data;             \
29         char buf[buflen];                                               \
30         int res;                                                        \
31                                                                         \
32         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
33         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
34 }                                                                       \
35                                                                         \
36 static const struct file_operations name## _ops = {                     \
37         .read = name## _read,                                           \
38         .open = mac80211_open_file_generic,                             \
39 };
40
41 #define DEBUGFS_ADD(name)                                               \
42         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
43
44 #define DEBUGFS_ADD_MODE(name, mode)                                    \
45         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
46
47
48 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
49                       local->hw.conf.channel->center_freq);
50 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
51                       local->total_ps_buffered);
52 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
53                       local->wep_iv & 0xffffff);
54 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
55         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
56
57 static ssize_t tsf_read(struct file *file, char __user *user_buf,
58                              size_t count, loff_t *ppos)
59 {
60         struct ieee80211_local *local = file->private_data;
61         u64 tsf;
62         char buf[100];
63
64         tsf = drv_get_tsf(local);
65
66         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
67
68         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
69 }
70
71 static ssize_t tsf_write(struct file *file,
72                          const char __user *user_buf,
73                          size_t count, loff_t *ppos)
74 {
75         struct ieee80211_local *local = file->private_data;
76         unsigned long long tsf;
77         char buf[100];
78         size_t len;
79
80         len = min(count, sizeof(buf) - 1);
81         if (copy_from_user(buf, user_buf, len))
82                 return -EFAULT;
83         buf[len] = '\0';
84
85         if (strncmp(buf, "reset", 5) == 0) {
86                 if (local->ops->reset_tsf) {
87                         drv_reset_tsf(local);
88                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
89                 }
90         } else {
91                 tsf = simple_strtoul(buf, NULL, 0);
92                 if (local->ops->set_tsf) {
93                         drv_set_tsf(local, tsf);
94                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
95                 }
96         }
97
98         return count;
99 }
100
101 static const struct file_operations tsf_ops = {
102         .read = tsf_read,
103         .write = tsf_write,
104         .open = mac80211_open_file_generic
105 };
106
107 static ssize_t reset_write(struct file *file, const char __user *user_buf,
108                            size_t count, loff_t *ppos)
109 {
110         struct ieee80211_local *local = file->private_data;
111
112         rtnl_lock();
113         __ieee80211_suspend(&local->hw);
114         __ieee80211_resume(&local->hw);
115         rtnl_unlock();
116
117         return count;
118 }
119
120 static const struct file_operations reset_ops = {
121         .write = reset_write,
122         .open = mac80211_open_file_generic,
123 };
124
125 static ssize_t noack_read(struct file *file, char __user *user_buf,
126                           size_t count, loff_t *ppos)
127 {
128         struct ieee80211_local *local = file->private_data;
129         int res;
130         char buf[10];
131
132         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
133
134         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
135 }
136
137 static ssize_t noack_write(struct file *file,
138                            const char __user *user_buf,
139                            size_t count, loff_t *ppos)
140 {
141         struct ieee80211_local *local = file->private_data;
142         char buf[10];
143         size_t len;
144
145         len = min(count, sizeof(buf) - 1);
146         if (copy_from_user(buf, user_buf, len))
147                 return -EFAULT;
148         buf[len] = '\0';
149
150         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
151
152         return count;
153 }
154
155 static const struct file_operations noack_ops = {
156         .read = noack_read,
157         .write = noack_write,
158         .open = mac80211_open_file_generic
159 };
160
161 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
162                                  size_t count, loff_t *ppos)
163 {
164         struct ieee80211_local *local = file->private_data;
165         int res;
166         char buf[10];
167
168         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
169
170         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
171 }
172
173 static ssize_t uapsd_queues_write(struct file *file,
174                                   const char __user *user_buf,
175                                   size_t count, loff_t *ppos)
176 {
177         struct ieee80211_local *local = file->private_data;
178         unsigned long val;
179         char buf[10];
180         size_t len;
181         int ret;
182
183         len = min(count, sizeof(buf) - 1);
184         if (copy_from_user(buf, user_buf, len))
185                 return -EFAULT;
186         buf[len] = '\0';
187
188         ret = strict_strtoul(buf, 0, &val);
189
190         if (ret)
191                 return -EINVAL;
192
193         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
194                 return -ERANGE;
195
196         local->uapsd_queues = val;
197
198         return count;
199 }
200
201 static const struct file_operations uapsd_queues_ops = {
202         .read = uapsd_queues_read,
203         .write = uapsd_queues_write,
204         .open = mac80211_open_file_generic
205 };
206
207 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
208                                      size_t count, loff_t *ppos)
209 {
210         struct ieee80211_local *local = file->private_data;
211         int res;
212         char buf[10];
213
214         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
215
216         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
217 }
218
219 static ssize_t uapsd_max_sp_len_write(struct file *file,
220                                       const char __user *user_buf,
221                                       size_t count, loff_t *ppos)
222 {
223         struct ieee80211_local *local = file->private_data;
224         unsigned long val;
225         char buf[10];
226         size_t len;
227         int ret;
228
229         len = min(count, sizeof(buf) - 1);
230         if (copy_from_user(buf, user_buf, len))
231                 return -EFAULT;
232         buf[len] = '\0';
233
234         ret = strict_strtoul(buf, 0, &val);
235
236         if (ret)
237                 return -EINVAL;
238
239         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
240                 return -ERANGE;
241
242         local->uapsd_max_sp_len = val;
243
244         return count;
245 }
246
247 static const struct file_operations uapsd_max_sp_len_ops = {
248         .read = uapsd_max_sp_len_read,
249         .write = uapsd_max_sp_len_write,
250         .open = mac80211_open_file_generic
251 };
252
253 static ssize_t queues_read(struct file *file, char __user *user_buf,
254                            size_t count, loff_t *ppos)
255 {
256         struct ieee80211_local *local = file->private_data;
257         unsigned long flags;
258         char buf[IEEE80211_MAX_QUEUES * 20];
259         int q, res = 0;
260
261         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
262         for (q = 0; q < local->hw.queues; q++)
263                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
264                                 local->queue_stop_reasons[q],
265                                 skb_queue_len(&local->pending[q]));
266         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
267
268         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
269 }
270
271 static const struct file_operations queues_ops = {
272         .read = queues_read,
273         .open = mac80211_open_file_generic
274 };
275
276 /* statistics stuff */
277
278 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
279         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
280
281 static ssize_t format_devstat_counter(struct ieee80211_local *local,
282         char __user *userbuf,
283         size_t count, loff_t *ppos,
284         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
285                           int buflen))
286 {
287         struct ieee80211_low_level_stats stats;
288         char buf[20];
289         int res;
290
291         rtnl_lock();
292         res = drv_get_stats(local, &stats);
293         rtnl_unlock();
294         if (res)
295                 return res;
296         res = printvalue(&stats, buf, sizeof(buf));
297         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
298 }
299
300 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
301 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
302                                  char *buf, int buflen)                 \
303 {                                                                       \
304         return scnprintf(buf, buflen, "%u\n", stats->name);             \
305 }                                                                       \
306 static ssize_t stats_ ##name## _read(struct file *file,                 \
307                                      char __user *userbuf,              \
308                                      size_t count, loff_t *ppos)        \
309 {                                                                       \
310         return format_devstat_counter(file->private_data,               \
311                                       userbuf,                          \
312                                       count,                            \
313                                       ppos,                             \
314                                       print_devstats_##name);           \
315 }                                                                       \
316                                                                         \
317 static const struct file_operations stats_ ##name## _ops = {            \
318         .read = stats_ ##name## _read,                                  \
319         .open = mac80211_open_file_generic,                             \
320 };
321
322 #define DEBUGFS_STATS_ADD(name)                                         \
323         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
324
325 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
326                    local->dot11TransmittedFragmentCount);
327 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
328                    local->dot11MulticastTransmittedFrameCount);
329 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
330                    local->dot11FailedCount);
331 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
332                    local->dot11RetryCount);
333 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
334                    local->dot11MultipleRetryCount);
335 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
336                    local->dot11FrameDuplicateCount);
337 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
338                    local->dot11ReceivedFragmentCount);
339 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
340                    local->dot11MulticastReceivedFrameCount);
341 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
342                    local->dot11TransmittedFrameCount);
343 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
344 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
345                    local->tx_handlers_drop);
346 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
347                    local->tx_handlers_queued);
348 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
349                    local->tx_handlers_drop_unencrypted);
350 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
351                    local->tx_handlers_drop_fragment);
352 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
353                    local->tx_handlers_drop_wep);
354 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
355                    local->tx_handlers_drop_not_assoc);
356 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
357                    local->tx_handlers_drop_unauth_port);
358 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
359                    local->rx_handlers_drop);
360 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
361                    local->rx_handlers_queued);
362 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
363                    local->rx_handlers_drop_nullfunc);
364 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
365                    local->rx_handlers_drop_defrag);
366 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
367                    local->rx_handlers_drop_short);
368 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
369                    local->rx_handlers_drop_passive_scan);
370 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
371                    local->tx_expand_skb_head);
372 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
373                    local->tx_expand_skb_head_cloned);
374 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
375                    local->rx_expand_skb_head);
376 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
377                    local->rx_expand_skb_head2);
378 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
379                    local->rx_handlers_fragments);
380 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
381                    local->tx_status_drop);
382
383 #endif
384
385 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
386 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
387 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
388 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
389
390
391 void debugfs_hw_add(struct ieee80211_local *local)
392 {
393         struct dentry *phyd = local->hw.wiphy->debugfsdir;
394         struct dentry *statsd;
395
396         if (!phyd)
397                 return;
398
399         local->debugfs.stations = debugfs_create_dir("stations", phyd);
400         local->debugfs.keys = debugfs_create_dir("keys", phyd);
401
402         DEBUGFS_ADD(frequency);
403         DEBUGFS_ADD(total_ps_buffered);
404         DEBUGFS_ADD(wep_iv);
405         DEBUGFS_ADD(tsf);
406         DEBUGFS_ADD(queues);
407         DEBUGFS_ADD_MODE(reset, 0200);
408         DEBUGFS_ADD(noack);
409         DEBUGFS_ADD(uapsd_queues);
410         DEBUGFS_ADD(uapsd_max_sp_len);
411
412         statsd = debugfs_create_dir("statistics", phyd);
413
414         /* if the dir failed, don't put all the other things into the root! */
415         if (!statsd)
416                 return;
417
418         DEBUGFS_STATS_ADD(transmitted_fragment_count);
419         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
420         DEBUGFS_STATS_ADD(failed_count);
421         DEBUGFS_STATS_ADD(retry_count);
422         DEBUGFS_STATS_ADD(multiple_retry_count);
423         DEBUGFS_STATS_ADD(frame_duplicate_count);
424         DEBUGFS_STATS_ADD(received_fragment_count);
425         DEBUGFS_STATS_ADD(multicast_received_frame_count);
426         DEBUGFS_STATS_ADD(transmitted_frame_count);
427 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
428         DEBUGFS_STATS_ADD(tx_handlers_drop);
429         DEBUGFS_STATS_ADD(tx_handlers_queued);
430         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
431         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
432         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
433         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
434         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
435         DEBUGFS_STATS_ADD(rx_handlers_drop);
436         DEBUGFS_STATS_ADD(rx_handlers_queued);
437         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
438         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
439         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
440         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
441         DEBUGFS_STATS_ADD(tx_expand_skb_head);
442         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
443         DEBUGFS_STATS_ADD(rx_expand_skb_head);
444         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
445         DEBUGFS_STATS_ADD(rx_handlers_fragments);
446         DEBUGFS_STATS_ADD(tx_status_drop);
447 #endif
448         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
449         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
450         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
451         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
452 }