iwlwifi: replace IWL_ERROR with IWL_ERR
[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  *  Intel Linux Wireless <ilw@linux.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                         || !dbgfs->dbgfs_##parent##_files.file_##name)  \
63                 goto err;                                               \
64 } while (0)
65
66 #define DEBUGFS_ADD_X32(name, parent, ptr) do {                        \
67         dbgfs->dbgfs_##parent##_files.file_##name =                     \
68         debugfs_create_x32(#name, 0444, dbgfs->dir_##parent, ptr);     \
69         if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)           \
70                         || !dbgfs->dbgfs_##parent##_files.file_##name)  \
71                 goto err;                                               \
72 } while (0)
73
74 #define DEBUGFS_REMOVE(name)  do {              \
75         debugfs_remove(name);                   \
76         name = NULL;                            \
77 } while (0);
78
79 /* file operation */
80 #define DEBUGFS_READ_FUNC(name)                                         \
81 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
82                                         char __user *user_buf,          \
83                                         size_t count, loff_t *ppos);
84
85 #define DEBUGFS_WRITE_FUNC(name)                                        \
86 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
87                                         const char __user *user_buf,    \
88                                         size_t count, loff_t *ppos);
89
90
91 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
92 {
93         file->private_data = inode->i_private;
94         return 0;
95 }
96
97 #define DEBUGFS_READ_FILE_OPS(name)                                     \
98         DEBUGFS_READ_FUNC(name);                                        \
99 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
100         .read = iwl_dbgfs_##name##_read,                                \
101         .open = iwl_dbgfs_open_file_generic,                            \
102 };
103
104 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
105         DEBUGFS_WRITE_FUNC(name);                                       \
106 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
107         .write = iwl_dbgfs_##name##_write,                              \
108         .open = iwl_dbgfs_open_file_generic,                            \
109 };
110
111
112 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
113         DEBUGFS_READ_FUNC(name);                                        \
114         DEBUGFS_WRITE_FUNC(name);                                       \
115 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
116         .write = iwl_dbgfs_##name##_write,                              \
117         .read = iwl_dbgfs_##name##_read,                                \
118         .open = iwl_dbgfs_open_file_generic,                            \
119 };
120
121
122 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
123                                                 char __user *user_buf,
124                                                 size_t count, loff_t *ppos) {
125
126         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
127         char buf[256];
128         int pos = 0;
129         const size_t bufsz = sizeof(buf);
130
131         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
132                                                 priv->tx_stats[0].cnt);
133         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
134                                                 priv->tx_stats[1].cnt);
135         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
136                                                 priv->tx_stats[2].cnt);
137
138         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
139 }
140
141 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
142                                                 char __user *user_buf,
143                                                 size_t count, loff_t *ppos) {
144
145         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
146         char buf[256];
147         int pos = 0;
148         const size_t bufsz = sizeof(buf);
149
150         pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
151                                                 priv->rx_stats[0].cnt);
152         pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
153                                                 priv->rx_stats[1].cnt);
154         pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
155                                                 priv->rx_stats[2].cnt);
156
157         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
158 }
159
160 #define BYTE1_MASK 0x000000ff;
161 #define BYTE2_MASK 0x0000ffff;
162 #define BYTE3_MASK 0x00ffffff;
163 static ssize_t iwl_dbgfs_sram_read(struct file *file,
164                                         char __user *user_buf,
165                                         size_t count, loff_t *ppos)
166 {
167         u32 val;
168         char buf[1024];
169         ssize_t ret;
170         int i;
171         int pos = 0;
172         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
173         const size_t bufsz = sizeof(buf);
174
175         iwl_grab_nic_access(priv);
176         for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
177                 val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
178                                         priv->dbgfs->sram_len - i);
179                 if (i < 4) {
180                         switch (i) {
181                         case 1:
182                                 val &= BYTE1_MASK;
183                                 break;
184                         case 2:
185                                 val &= BYTE2_MASK;
186                                 break;
187                         case 3:
188                                 val &= BYTE3_MASK;
189                                 break;
190                         }
191                 }
192                 pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
193         }
194         pos += scnprintf(buf + pos, bufsz - pos, "\n");
195         iwl_release_nic_access(priv);
196
197         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
198         return ret;
199 }
200
201 static ssize_t iwl_dbgfs_sram_write(struct file *file,
202                                         const char __user *user_buf,
203                                         size_t count, loff_t *ppos)
204 {
205         struct iwl_priv *priv = file->private_data;
206         char buf[64];
207         int buf_size;
208         u32 offset, len;
209
210         memset(buf, 0, sizeof(buf));
211         buf_size = min(count, sizeof(buf) -  1);
212         if (copy_from_user(buf, user_buf, buf_size))
213                 return -EFAULT;
214
215         if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
216                 priv->dbgfs->sram_offset = offset;
217                 priv->dbgfs->sram_len = len;
218         } else {
219                 priv->dbgfs->sram_offset = 0;
220                 priv->dbgfs->sram_len = 0;
221         }
222
223         return count;
224 }
225
226 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
227                                         size_t count, loff_t *ppos)
228 {
229         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
230         struct iwl_station_entry *station;
231         int max_sta = priv->hw_params.max_stations;
232         char *buf;
233         int i, j, pos = 0;
234         ssize_t ret;
235         /* Add 30 for initial string */
236         const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
237
238         buf = kmalloc(bufsz, GFP_KERNEL);
239         if (!buf)
240                 return -ENOMEM;
241
242         pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
243                         priv->num_stations);
244
245         for (i = 0; i < max_sta; i++) {
246                 station = &priv->stations[i];
247                 if (station->used) {
248                         pos += scnprintf(buf + pos, bufsz - pos,
249                                         "station %d:\ngeneral data:\n", i+1);
250                         pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
251                                         station->sta.sta.sta_id);
252                         pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
253                                         station->sta.mode);
254                         pos += scnprintf(buf + pos, bufsz - pos,
255                                         "flags: 0x%x\n",
256                                         station->sta.station_flags_msk);
257                         pos += scnprintf(buf + pos, bufsz - pos,
258                                         "ps_status: %u\n", station->ps_status);
259                         pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
260                         pos += scnprintf(buf + pos, bufsz - pos,
261                                         "seq_num\t\ttxq_id");
262                         pos += scnprintf(buf + pos, bufsz - pos,
263                                         "\tframe_count\twait_for_ba\t");
264                         pos += scnprintf(buf + pos, bufsz - pos,
265                                         "start_idx\tbitmap0\t");
266                         pos += scnprintf(buf + pos, bufsz - pos,
267                                         "bitmap1\trate_n_flags");
268                         pos += scnprintf(buf + pos, bufsz - pos, "\n");
269
270                         for (j = 0; j < MAX_TID_COUNT; j++) {
271                                 pos += scnprintf(buf + pos, bufsz - pos,
272                                                 "[%d]:\t\t%u", j,
273                                                 station->tid[j].seq_number);
274                                 pos += scnprintf(buf + pos, bufsz - pos,
275                                                 "\t%u\t\t%u\t\t%u\t\t",
276                                                 station->tid[j].agg.txq_id,
277                                                 station->tid[j].agg.frame_count,
278                                                 station->tid[j].agg.wait_for_ba);
279                                 pos += scnprintf(buf + pos, bufsz - pos,
280                                                 "%u\t%llu\t%u",
281                                                 station->tid[j].agg.start_idx,
282                                                 (unsigned long long)station->tid[j].agg.bitmap,
283                                                 station->tid[j].agg.rate_n_flags);
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_ERR(priv, "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_ERR(priv, "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
357
358 static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf,
359                                        size_t count, loff_t *ppos)
360 {
361         struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
362         struct ieee80211_channel *channels = NULL;
363         const struct ieee80211_supported_band *supp_band = NULL;
364         int pos = 0, i, bufsz = PAGE_SIZE;
365         char *buf;
366         ssize_t ret;
367
368         if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
369                 return -EAGAIN;
370
371         buf = kzalloc(bufsz, GFP_KERNEL);
372         if (!buf) {
373                 IWL_ERR(priv, "Can not allocate Buffer\n");
374                 return -ENOMEM;
375         }
376
377         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
378         channels = supp_band->channels;
379
380         pos += scnprintf(buf + pos, bufsz - pos,
381                         "Displaying %d channels in 2.4GHz band 802.11bg):\n",
382                          supp_band->n_channels);
383
384         for (i = 0; i < supp_band->n_channels; i++)
385                 pos += scnprintf(buf + pos, bufsz - pos,
386                                 "%d: %ddBm: BSS%s%s, %s.\n",
387                                 ieee80211_frequency_to_channel(
388                                 channels[i].center_freq),
389                                 channels[i].max_power,
390                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
391                                 " (IEEE 802.11h required)" : "",
392                                 (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
393                                 || (channels[i].flags &
394                                 IEEE80211_CHAN_RADAR)) ? "" :
395                                 ", IBSS",
396                                 channels[i].flags &
397                                 IEEE80211_CHAN_PASSIVE_SCAN ?
398                                 "passive only" : "active/passive");
399
400         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
401         channels = supp_band->channels;
402
403         pos += scnprintf(buf + pos, bufsz - pos,
404                         "Displaying %d channels in 5.2GHz band (802.11a)\n",
405                         supp_band->n_channels);
406
407         for (i = 0; i < supp_band->n_channels; i++)
408                 pos += scnprintf(buf + pos, bufsz - pos,
409                                 "%d: %ddBm: BSS%s%s, %s.\n",
410                                 ieee80211_frequency_to_channel(
411                                 channels[i].center_freq),
412                                 channels[i].max_power,
413                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
414                                 " (IEEE 802.11h required)" : "",
415                                 ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
416                                 || (channels[i].flags &
417                                 IEEE80211_CHAN_RADAR)) ? "" :
418                                 ", IBSS",
419                                 channels[i].flags &
420                                 IEEE80211_CHAN_PASSIVE_SCAN ?
421                                 "passive only" : "active/passive");
422
423         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
424         kfree(buf);
425         return ret;
426 }
427
428 DEBUGFS_READ_WRITE_FILE_OPS(sram);
429 DEBUGFS_WRITE_FILE_OPS(log_event);
430 DEBUGFS_READ_FILE_OPS(eeprom);
431 DEBUGFS_READ_FILE_OPS(stations);
432 DEBUGFS_READ_FILE_OPS(rx_statistics);
433 DEBUGFS_READ_FILE_OPS(tx_statistics);
434 DEBUGFS_READ_FILE_OPS(channels);
435
436 /*
437  * Create the debugfs files and directories
438  *
439  */
440 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
441 {
442         struct iwl_debugfs *dbgfs;
443         struct dentry *phyd = priv->hw->wiphy->debugfsdir;
444         int ret = 0;
445
446         dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
447         if (!dbgfs) {
448                 ret = -ENOMEM;
449                 goto err;
450         }
451
452         priv->dbgfs = dbgfs;
453         dbgfs->name = name;
454         dbgfs->dir_drv = debugfs_create_dir(name, phyd);
455         if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
456                 ret = -ENOENT;
457                 goto err;
458         }
459
460         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
461         DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
462         DEBUGFS_ADD_FILE(eeprom, data);
463         DEBUGFS_ADD_FILE(sram, data);
464         DEBUGFS_ADD_FILE(log_event, data);
465         DEBUGFS_ADD_FILE(stations, data);
466         DEBUGFS_ADD_FILE(rx_statistics, data);
467         DEBUGFS_ADD_FILE(tx_statistics, data);
468         DEBUGFS_ADD_FILE(channels, data);
469         DEBUGFS_ADD_X32(status, data, (u32 *)&priv->status);
470         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
471         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
472                          &priv->disable_chain_noise_cal);
473         DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
474         return 0;
475
476 err:
477         IWL_ERR(priv, "Can't open the debugfs directory\n");
478         iwl_dbgfs_unregister(priv);
479         return ret;
480 }
481 EXPORT_SYMBOL(iwl_dbgfs_register);
482
483 /**
484  * Remove the debugfs files and directories
485  *
486  */
487 void iwl_dbgfs_unregister(struct iwl_priv *priv)
488 {
489         if (!priv->dbgfs)
490                 return;
491
492         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
493         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
494         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
495         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
496         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
497         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
498         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels);
499         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
500         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
501         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
502         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
503         DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
504         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
505         kfree(priv->dbgfs);
506         priv->dbgfs = NULL;
507 }
508 EXPORT_SYMBOL(iwl_dbgfs_unregister);
509
510
511