iwlwifi: trigger event log from debugfs
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-debugfs.c
1 /******************************************************************************
2  *
3  * GPL LICENSE SUMMARY
4  *
5  * Copyright(c) 2008 Intel Corporation. All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of version 2 of the GNU General Public License as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19  * USA
20  *
21  * The full GNU General Public License is included in this distribution
22  * in the file called LICENSE.GPL.
23  *
24  * Contact Information:
25  * Tomas Winkler <tomas.winkler@intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/debugfs.h>
32
33 #include <linux/ieee80211.h>
34 #include <net/mac80211.h>
35
36
37 #include "iwl-dev.h"
38 #include "iwl-debug.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41
42
43 /* create and remove of files */
44 #define DEBUGFS_ADD_DIR(name, parent) do {                              \
45         dbgfs->dir_##name = debugfs_create_dir(#name, parent);          \
46         if (!(dbgfs->dir_##name))                                       \
47                 goto err;                                               \
48 } while (0)
49
50 #define DEBUGFS_ADD_FILE(name, parent) do {                             \
51         dbgfs->dbgfs_##parent##_files.file_##name =                     \
52         debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
53                                 &iwl_dbgfs_##name##_ops);               \
54         if (!(dbgfs->dbgfs_##parent##_files.file_##name))               \
55                 goto err;                                               \
56 } while (0)
57
58 #define DEBUGFS_ADD_BOOL(name, parent, ptr) do {                        \
59         dbgfs->dbgfs_##parent##_files.file_##name =                     \
60         debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr);     \
61         if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name))          \
62                 goto err;                                               \
63 } while (0)
64
65 #define DEBUGFS_REMOVE(name)  do {              \
66         debugfs_remove(name);                   \
67         name = NULL;                            \
68 } while (0);
69
70 /* file operation */
71 #define DEBUGFS_READ_FUNC(name)                                         \
72 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
73                                         char __user *user_buf,          \
74                                         size_t count, loff_t *ppos);
75
76 #define DEBUGFS_WRITE_FUNC(name)                                        \
77 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
78                                         const char __user *user_buf,    \
79                                         size_t count, loff_t *ppos);
80
81
82 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
83 {
84         file->private_data = inode->i_private;
85         return 0;
86 }
87
88 #define DEBUGFS_READ_FILE_OPS(name)                                     \
89         DEBUGFS_READ_FUNC(name);                                        \
90 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
91         .read = iwl_dbgfs_##name##_read,                                \
92         .open = iwl_dbgfs_open_file_generic,                            \
93 };
94
95 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
96         DEBUGFS_WRITE_FUNC(name);                                       \
97 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
98         .write = iwl_dbgfs_##name##_write,                              \
99         .open = iwl_dbgfs_open_file_generic,                            \
100 };
101
102
103 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
104         DEBUGFS_READ_FUNC(name);                                        \
105         DEBUGFS_WRITE_FUNC(name);                                       \
106 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
107         .write = iwl_dbgfs_##name##_write,                              \
108         .read = iwl_dbgfs_##name##_read,                                \
109         .open = iwl_dbgfs_open_file_generic,                            \
110 };
111
112
113 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
114                                                 char __user *user_buf,
115                                                 size_t count, loff_t *ppos) {
116
117         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
118         char buf[256];
119         int pos = 0;
120         const size_t bufsz = sizeof(buf);
121
122         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
123                                                 priv->tx_stats[0].cnt);
124         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
125                                                 priv->tx_stats[1].cnt);
126         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
127                                                 priv->tx_stats[2].cnt);
128
129         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
130 }
131
132 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
133                                                 char __user *user_buf,
134                                                 size_t count, loff_t *ppos) {
135
136         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
137         char buf[256];
138         int pos = 0;
139         const size_t bufsz = sizeof(buf);
140
141         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
142                                                 priv->rx_stats[0].cnt);
143         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
144                                                 priv->rx_stats[1].cnt);
145         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
146                                                 priv->rx_stats[2].cnt);
147
148         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
149 }
150
151 #define BYTE1_MASK 0x000000ff;
152 #define BYTE2_MASK 0x0000ffff;
153 #define BYTE3_MASK 0x00ffffff;
154 static ssize_t iwl_dbgfs_sram_read(struct file *file,
155                                         char __user *user_buf,
156                                         size_t count, loff_t *ppos)
157 {
158         u32 val;
159         char buf[1024];
160         ssize_t ret;
161         int i;
162         int pos = 0;
163         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
164         const size_t bufsz = sizeof(buf);
165
166         printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
167         priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
168
169         iwl_grab_nic_access(priv);
170         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
171                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
172                                         priv->dbgfs->sram_len - i);
173                 if (i < 4) {
174                         switch (i) {
175                         case 1:
176                                 val &= BYTE1_MASK;
177                                 break;
178                         case 2:
179                                 val &= BYTE2_MASK;
180                                 break;
181                         case 3:
182                                 val &= BYTE3_MASK;
183                                 break;
184                         }
185                 }
186                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
187         }
188         pos += scnprintf(buf + pos, bufsz - pos, "\n");
189         iwl_release_nic_access(priv);
190
191         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
192         return ret;
193 }
194
195 static ssize_t iwl_dbgfs_sram_write(struct file *file,
196                                         const char __user *user_buf,
197                                         size_t count, loff_t *ppos)
198 {
199         struct iwl_priv *priv = file->private_data;
200         char buf[64];
201         int buf_size;
202         u32 offset, len;
203
204         memset(buf, 0, sizeof(buf));
205         buf_size = min(count, sizeof(buf) -  1);
206         if (copy_from_user(buf, user_buf, buf_size))
207                 return -EFAULT;
208
209         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
210                 priv->dbgfs->sram_offset = offset;
211                 priv->dbgfs->sram_len = len;
212         } else {
213                 priv->dbgfs->sram_offset = 0;
214                 priv->dbgfs->sram_len = 0;
215         }
216
217         return count;
218 }
219
220 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
221                                         size_t count, loff_t *ppos)
222 {
223         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
224         struct iwl_station_entry *station;
225         int max_sta = priv->hw_params.max_stations;
226         char *buf;
227         int i, j, pos = 0;
228         ssize_t ret;
229         /* Add 30 for initial string */
230         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
231         DECLARE_MAC_BUF(mac);
232
233         buf = kmalloc(bufsz, GFP_KERNEL);
234         if(!buf)
235                 return -ENOMEM;
236
237         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
238                         priv->num_stations);
239
240         for (i = 0; i < max_sta; i++) {
241                 station = &priv->stations[i];
242                 if (station->used) {
243                         pos += scnprintf(buf + pos, bufsz - pos,
244                                         "station %d:\ngeneral data:\n", i+1);
245                         print_mac(mac, station->sta.sta.addr);
246                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
247                                         station->sta.sta.sta_id);
248                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
249                                         station->sta.mode);
250                         pos += scnprintf(buf + pos, bufsz - pos,
251                                         "flags: 0x%x\n",
252                                         station->sta.station_flags_msk);
253                         pos += scnprintf(buf + pos, bufsz - pos,
254                                         "ps_status: %u\n", station->ps_status);
255                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
256                         pos += scnprintf(buf + pos, bufsz - pos,
257                                         "seq_num\t\ttxq_id");
258 #ifdef CONFIG_IWL4965_HT
259                         pos += scnprintf(buf + pos, bufsz - pos,
260                                         "\tframe_count\twait_for_ba\t");
261                         pos += scnprintf(buf + pos, bufsz - pos,
262                                         "start_idx\tbitmap0\t");
263                         pos += scnprintf(buf + pos, bufsz - pos,
264                                         "bitmap1\trate_n_flags");
265 #endif
266                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
267
268                         for (j = 0; j < MAX_TID_COUNT; j++) {
269                                 pos += scnprintf(buf + pos, bufsz - pos,
270                                                 "[%d]:\t\t%u", j,
271                                                 station->tid[j].seq_number);
272 #ifdef CONFIG_IWL4965_HT
273                                 pos += scnprintf(buf + pos, bufsz - pos,
274                                                 "\t%u\t\t%u\t\t%u\t\t",
275                                                 station->tid[j].agg.txq_id,
276                                                 station->tid[j].agg.frame_count,
277                                                 station->tid[j].agg.wait_for_ba);
278                                 pos += scnprintf(buf + pos, bufsz - pos,
279                                                 "%u\t%llu\t%u",
280                                                 station->tid[j].agg.start_idx,
281                                                 (unsigned long long)station->tid[j].agg.bitmap,
282                                                 station->tid[j].agg.rate_n_flags);
283 #endif
284                                 pos += scnprintf(buf + pos, bufsz - pos, "\n");
285                         }
286                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
287                 }
288         }
289
290         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
291         kfree(buf);
292         return ret;
293 }
294
295 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
296                                        char __user *user_buf,
297                                        size_t count,
298                                        loff_t *ppos)
299 {
300         ssize_t ret;
301         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
302         int pos = 0, ofs = 0, buf_size = 0;
303         const u8 *ptr;
304         char *buf;
305         size_t eeprom_len = priv->cfg->eeprom_size;
306         buf_size = 4 * eeprom_len + 256;
307
308         if (eeprom_len % 16) {
309                 IWL_ERROR("EEPROM size is not multiple of 16.\n");
310                 return -ENODATA;
311         }
312
313         /* 4 characters for byte 0xYY */
314         buf = kzalloc(buf_size, GFP_KERNEL);
315         if (!buf) {
316                 IWL_ERROR("Can not allocate Buffer\n");
317                 return -ENOMEM;
318         }
319
320         ptr = priv->eeprom;
321         for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
322                 pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
323                 hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
324                                    buf_size - pos, 0);
325                 pos += strlen(buf);
326                 if (buf_size - pos > 0)
327                         buf[pos++] = '\n';
328         }
329
330         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
331         kfree(buf);
332         return ret;
333 }
334
335 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
336                                         const char __user *user_buf,
337                                         size_t count, loff_t *ppos)
338 {
339         struct iwl_priv *priv = file->private_data;
340         u32 event_log_flag;
341         char buf[8];
342         int buf_size;
343
344         memset(buf, 0, sizeof(buf));
345         buf_size = min(count, sizeof(buf) -  1);
346         if (copy_from_user(buf, user_buf, buf_size))
347                 return -EFAULT;
348         if (sscanf(buf, "%d", &event_log_flag) != 1)
349                 return -EFAULT;
350         if (event_log_flag == 1)
351                 iwl_dump_nic_event_log(priv);
352
353         return count;
354 }
355
356 DEBUGFS_READ_WRITE_FILE_OPS(sram);
357 DEBUGFS_WRITE_FILE_OPS(log_event);
358 DEBUGFS_READ_FILE_OPS(eeprom);
359 DEBUGFS_READ_FILE_OPS(stations);
360 DEBUGFS_READ_FILE_OPS(rx_statistics);
361 DEBUGFS_READ_FILE_OPS(tx_statistics);
362
363 /*
364  * Create the debugfs files and directories
365  *
366  */
367 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
368 {
369         struct iwl_debugfs *dbgfs;
370
371         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
372         if (!dbgfs) {
373                 goto err;
374         }
375
376         priv->dbgfs = dbgfs;
377         dbgfs->name = name;
378         dbgfs->dir_drv = debugfs_create_dir(name, NULL);
379         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
380                 goto err;
381         }
382
383         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
384         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
385         DEBUGFS_ADD_FILE(eeprom, data);
386         DEBUGFS_ADD_FILE(sram, data);
387         DEBUGFS_ADD_FILE(log_event, data);
388         DEBUGFS_ADD_FILE(stations, data);
389         DEBUGFS_ADD_FILE(rx_statistics, data);
390         DEBUGFS_ADD_FILE(tx_statistics, data);
391 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
392         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
393         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
394                          &priv->disable_chain_noise_cal);
395 #endif  /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
396         return 0;
397
398 err:
399         IWL_ERROR("Can't open the debugfs directory\n");
400         iwl_dbgfs_unregister(priv);
401         return -ENOENT;
402 }
403 EXPORT_SYMBOL(iwl_dbgfs_register);
404
405 /**
406  * Remove the debugfs files and directories
407  *
408  */
409 void iwl_dbgfs_unregister(struct iwl_priv *priv)
410 {
411         if (!(priv->dbgfs))
412                 return;
413
414         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
415         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
416         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
417         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
418         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
419         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
420         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
421 #ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
422         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
423         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
424 #endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
425         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
426         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
427         kfree(priv->dbgfs);
428         priv->dbgfs = NULL;
429 }
430 EXPORT_SYMBOL(iwl_dbgfs_unregister);
431
432
433