mac80211: quiesce vif before suspending
[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_FORMAT_BUFFER_SIZE 100
25
26 int mac80211_format_buffer(char __user *userbuf, size_t count,
27                                   loff_t *ppos, char *fmt, ...)
28 {
29         va_list args;
30         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
31         int res;
32
33         va_start(args, fmt);
34         res = vscnprintf(buf, sizeof(buf), fmt, args);
35         va_end(args);
36
37         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
38 }
39
40 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
41 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
42                             size_t count, loff_t *ppos)                 \
43 {                                                                       \
44         struct ieee80211_local *local = file->private_data;             \
45                                                                         \
46         return mac80211_format_buffer(userbuf, count, ppos,             \
47                                       fmt "\n", ##value);               \
48 }
49
50 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
51 static const struct file_operations name## _ops = {                     \
52         .read = name## _read,                                           \
53         .open = mac80211_open_file_generic,                             \
54         .llseek = generic_file_llseek,                                  \
55 };
56
57 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
58         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
59         DEBUGFS_READONLY_FILE_OPS(name)
60
61 #define DEBUGFS_ADD(name)                                               \
62         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
63
64 #define DEBUGFS_ADD_MODE(name, mode)                                    \
65         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
66
67
68 DEBUGFS_READONLY_FILE(user_power, "%d",
69                       local->user_power_level);
70 DEBUGFS_READONLY_FILE(power, "%d",
71                       local->hw.conf.power_level);
72 DEBUGFS_READONLY_FILE(frequency, "%d",
73                       local->hw.conf.channel->center_freq);
74 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
75                       local->total_ps_buffered);
76 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
77                       local->wep_iv & 0xffffff);
78 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
79         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
80
81 static ssize_t tsf_read(struct file *file, char __user *user_buf,
82                              size_t count, loff_t *ppos)
83 {
84         struct ieee80211_local *local = file->private_data;
85         u64 tsf;
86
87         tsf = drv_get_tsf(local);
88
89         return mac80211_format_buffer(user_buf, count, ppos, "0x%016llx\n",
90                                       (unsigned long long) tsf);
91 }
92
93 static ssize_t tsf_write(struct file *file,
94                          const char __user *user_buf,
95                          size_t count, loff_t *ppos)
96 {
97         struct ieee80211_local *local = file->private_data;
98         unsigned long long tsf;
99         char buf[100];
100         size_t len;
101
102         len = min(count, sizeof(buf) - 1);
103         if (copy_from_user(buf, user_buf, len))
104                 return -EFAULT;
105         buf[len] = '\0';
106
107         if (strncmp(buf, "reset", 5) == 0) {
108                 if (local->ops->reset_tsf) {
109                         drv_reset_tsf(local);
110                         wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
111                 }
112         } else {
113                 tsf = simple_strtoul(buf, NULL, 0);
114                 if (local->ops->set_tsf) {
115                         drv_set_tsf(local, tsf);
116                         wiphy_info(local->hw.wiphy,
117                                    "debugfs set TSF to %#018llx\n", tsf);
118
119                 }
120         }
121
122         return count;
123 }
124
125 static const struct file_operations tsf_ops = {
126         .read = tsf_read,
127         .write = tsf_write,
128         .open = mac80211_open_file_generic,
129         .llseek = default_llseek,
130 };
131
132 static ssize_t reset_write(struct file *file, const char __user *user_buf,
133                            size_t count, loff_t *ppos)
134 {
135         struct ieee80211_local *local = file->private_data;
136
137         rtnl_lock();
138         __ieee80211_suspend(&local->hw, NULL);
139         __ieee80211_resume(&local->hw);
140         rtnl_unlock();
141
142         return count;
143 }
144
145 static const struct file_operations reset_ops = {
146         .write = reset_write,
147         .open = mac80211_open_file_generic,
148         .llseek = noop_llseek,
149 };
150
151 static ssize_t noack_read(struct file *file, char __user *user_buf,
152                           size_t count, loff_t *ppos)
153 {
154         struct ieee80211_local *local = file->private_data;
155
156         return mac80211_format_buffer(user_buf, count, ppos, "%d\n",
157                                       local->wifi_wme_noack_test);
158 }
159
160 static ssize_t noack_write(struct file *file,
161                            const char __user *user_buf,
162                            size_t count, loff_t *ppos)
163 {
164         struct ieee80211_local *local = file->private_data;
165         char buf[10];
166         size_t len;
167
168         len = min(count, sizeof(buf) - 1);
169         if (copy_from_user(buf, user_buf, len))
170                 return -EFAULT;
171         buf[len] = '\0';
172
173         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
174
175         return count;
176 }
177
178 static const struct file_operations noack_ops = {
179         .read = noack_read,
180         .write = noack_write,
181         .open = mac80211_open_file_generic,
182         .llseek = default_llseek,
183 };
184
185 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
186                                  size_t count, loff_t *ppos)
187 {
188         struct ieee80211_local *local = file->private_data;
189         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
190                                       local->uapsd_queues);
191 }
192
193 static ssize_t uapsd_queues_write(struct file *file,
194                                   const char __user *user_buf,
195                                   size_t count, loff_t *ppos)
196 {
197         struct ieee80211_local *local = file->private_data;
198         unsigned long val;
199         char buf[10];
200         size_t len;
201         int ret;
202
203         len = min(count, sizeof(buf) - 1);
204         if (copy_from_user(buf, user_buf, len))
205                 return -EFAULT;
206         buf[len] = '\0';
207
208         ret = strict_strtoul(buf, 0, &val);
209
210         if (ret)
211                 return -EINVAL;
212
213         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
214                 return -ERANGE;
215
216         local->uapsd_queues = val;
217
218         return count;
219 }
220
221 static const struct file_operations uapsd_queues_ops = {
222         .read = uapsd_queues_read,
223         .write = uapsd_queues_write,
224         .open = mac80211_open_file_generic,
225         .llseek = default_llseek,
226 };
227
228 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
229                                      size_t count, loff_t *ppos)
230 {
231         struct ieee80211_local *local = file->private_data;
232
233         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
234                                       local->uapsd_max_sp_len);
235 }
236
237 static ssize_t uapsd_max_sp_len_write(struct file *file,
238                                       const char __user *user_buf,
239                                       size_t count, loff_t *ppos)
240 {
241         struct ieee80211_local *local = file->private_data;
242         unsigned long val;
243         char buf[10];
244         size_t len;
245         int ret;
246
247         len = min(count, sizeof(buf) - 1);
248         if (copy_from_user(buf, user_buf, len))
249                 return -EFAULT;
250         buf[len] = '\0';
251
252         ret = strict_strtoul(buf, 0, &val);
253
254         if (ret)
255                 return -EINVAL;
256
257         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
258                 return -ERANGE;
259
260         local->uapsd_max_sp_len = val;
261
262         return count;
263 }
264
265 static const struct file_operations uapsd_max_sp_len_ops = {
266         .read = uapsd_max_sp_len_read,
267         .write = uapsd_max_sp_len_write,
268         .open = mac80211_open_file_generic,
269         .llseek = default_llseek,
270 };
271
272 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
273                        size_t count, loff_t *ppos)
274 {
275         struct ieee80211_local *local = file->private_data;
276         const char *buf;
277
278         switch (local->hw.conf.channel_type) {
279         case NL80211_CHAN_NO_HT:
280                 buf = "no ht\n";
281                 break;
282         case NL80211_CHAN_HT20:
283                 buf = "ht20\n";
284                 break;
285         case NL80211_CHAN_HT40MINUS:
286                 buf = "ht40-\n";
287                 break;
288         case NL80211_CHAN_HT40PLUS:
289                 buf = "ht40+\n";
290                 break;
291         default:
292                 buf = "???";
293                 break;
294         }
295
296         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
297 }
298
299 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
300                             size_t count, loff_t *ppos)
301 {
302         struct ieee80211_local *local = file->private_data;
303         int mxln = 500;
304         ssize_t rv;
305         char *buf = kzalloc(mxln, GFP_KERNEL);
306         int sf = 0; /* how many written so far */
307
308         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
309         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
310                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
311         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
312                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
313         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
314                 sf += snprintf(buf + sf, mxln - sf,
315                                "HOST_BCAST_PS_BUFFERING\n");
316         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
317                 sf += snprintf(buf + sf, mxln - sf,
318                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
319         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
320                 sf += snprintf(buf + sf, mxln - sf,
321                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
322         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
323                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
324         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
325                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
326         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
327                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
328         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
329                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
330         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
331                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
332         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
333                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
334         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
335                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
336         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
337                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
338         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
339                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
340         if (local->hw.flags & IEEE80211_HW_BEACON_FILTER)
341                 sf += snprintf(buf + sf, mxln - sf, "BEACON_FILTER\n");
342         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
343                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
344         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
345                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
346         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
347                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
348         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
349                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
350         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
351                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
352         if (local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)
353                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_CQM_RSSI\n");
354         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
355                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
356         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
357                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
358
359         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
360         kfree(buf);
361         return rv;
362 }
363
364 static ssize_t queues_read(struct file *file, char __user *user_buf,
365                            size_t count, loff_t *ppos)
366 {
367         struct ieee80211_local *local = file->private_data;
368         unsigned long flags;
369         char buf[IEEE80211_MAX_QUEUES * 20];
370         int q, res = 0;
371
372         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
373         for (q = 0; q < local->hw.queues; q++)
374                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
375                                 local->queue_stop_reasons[q],
376                                 skb_queue_len(&local->pending[q]));
377         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
378
379         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
380 }
381
382 DEBUGFS_READONLY_FILE_OPS(hwflags);
383 DEBUGFS_READONLY_FILE_OPS(channel_type);
384 DEBUGFS_READONLY_FILE_OPS(queues);
385
386 /* statistics stuff */
387
388 static ssize_t format_devstat_counter(struct ieee80211_local *local,
389         char __user *userbuf,
390         size_t count, loff_t *ppos,
391         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
392                           int buflen))
393 {
394         struct ieee80211_low_level_stats stats;
395         char buf[20];
396         int res;
397
398         rtnl_lock();
399         res = drv_get_stats(local, &stats);
400         rtnl_unlock();
401         if (res)
402                 return res;
403         res = printvalue(&stats, buf, sizeof(buf));
404         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
405 }
406
407 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
408 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
409                                  char *buf, int buflen)                 \
410 {                                                                       \
411         return scnprintf(buf, buflen, "%u\n", stats->name);             \
412 }                                                                       \
413 static ssize_t stats_ ##name## _read(struct file *file,                 \
414                                      char __user *userbuf,              \
415                                      size_t count, loff_t *ppos)        \
416 {                                                                       \
417         return format_devstat_counter(file->private_data,               \
418                                       userbuf,                          \
419                                       count,                            \
420                                       ppos,                             \
421                                       print_devstats_##name);           \
422 }                                                                       \
423                                                                         \
424 static const struct file_operations stats_ ##name## _ops = {            \
425         .read = stats_ ##name## _read,                                  \
426         .open = mac80211_open_file_generic,                             \
427         .llseek = generic_file_llseek,                                  \
428 };
429
430 #define DEBUGFS_STATS_ADD(name, field)                                  \
431         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
432 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
433         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
434
435 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
436 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
437 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
438 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
439
440 void debugfs_hw_add(struct ieee80211_local *local)
441 {
442         struct dentry *phyd = local->hw.wiphy->debugfsdir;
443         struct dentry *statsd;
444
445         if (!phyd)
446                 return;
447
448         local->debugfs.keys = debugfs_create_dir("keys", phyd);
449
450         DEBUGFS_ADD(frequency);
451         DEBUGFS_ADD(total_ps_buffered);
452         DEBUGFS_ADD(wep_iv);
453         DEBUGFS_ADD(tsf);
454         DEBUGFS_ADD(queues);
455         DEBUGFS_ADD_MODE(reset, 0200);
456         DEBUGFS_ADD(noack);
457         DEBUGFS_ADD(uapsd_queues);
458         DEBUGFS_ADD(uapsd_max_sp_len);
459         DEBUGFS_ADD(channel_type);
460         DEBUGFS_ADD(hwflags);
461         DEBUGFS_ADD(user_power);
462         DEBUGFS_ADD(power);
463
464         statsd = debugfs_create_dir("statistics", phyd);
465
466         /* if the dir failed, don't put all the other things into the root! */
467         if (!statsd)
468                 return;
469
470         DEBUGFS_STATS_ADD(transmitted_fragment_count,
471                 local->dot11TransmittedFragmentCount);
472         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
473                 local->dot11MulticastTransmittedFrameCount);
474         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
475         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
476         DEBUGFS_STATS_ADD(multiple_retry_count,
477                 local->dot11MultipleRetryCount);
478         DEBUGFS_STATS_ADD(frame_duplicate_count,
479                 local->dot11FrameDuplicateCount);
480         DEBUGFS_STATS_ADD(received_fragment_count,
481                 local->dot11ReceivedFragmentCount);
482         DEBUGFS_STATS_ADD(multicast_received_frame_count,
483                 local->dot11MulticastReceivedFrameCount);
484         DEBUGFS_STATS_ADD(transmitted_frame_count,
485                 local->dot11TransmittedFrameCount);
486 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
487         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
488         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
489         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
490                 local->tx_handlers_drop_unencrypted);
491         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
492                 local->tx_handlers_drop_fragment);
493         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
494                 local->tx_handlers_drop_wep);
495         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
496                 local->tx_handlers_drop_not_assoc);
497         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
498                 local->tx_handlers_drop_unauth_port);
499         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
500         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
501         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
502                 local->rx_handlers_drop_nullfunc);
503         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
504                 local->rx_handlers_drop_defrag);
505         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
506                 local->rx_handlers_drop_short);
507         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
508                 local->rx_handlers_drop_passive_scan);
509         DEBUGFS_STATS_ADD(tx_expand_skb_head,
510                 local->tx_expand_skb_head);
511         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
512                 local->tx_expand_skb_head_cloned);
513         DEBUGFS_STATS_ADD(rx_expand_skb_head,
514                 local->rx_expand_skb_head);
515         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
516                 local->rx_expand_skb_head2);
517         DEBUGFS_STATS_ADD(rx_handlers_fragments,
518                 local->rx_handlers_fragments);
519         DEBUGFS_STATS_ADD(tx_status_drop,
520                 local->tx_status_drop);
521 #endif
522         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
523         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
524         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
525         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
526 }