iwl-debugfs.c revision 3ac7f14694dd38273d9d96f1c873233d71190c15 
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)                                         \
72static 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)                                        \
77static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
78					const char __user *user_buf,    \
79					size_t count, loff_t *ppos);
80
81
82static 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);                                        \
90static 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);                                       \
97static 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);                                       \
106static 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
113static 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
132static 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;
154static 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
195static 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
220static 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			pos += scnprintf(buf + pos, bufsz - pos,
259					"\tframe_count\twait_for_ba\t");
260			pos += scnprintf(buf + pos, bufsz - pos,
261					"start_idx\tbitmap0\t");
262			pos += scnprintf(buf + pos, bufsz - pos,
263					"bitmap1\trate_n_flags");
264			pos += scnprintf(buf + pos, bufsz - pos, "\n");
265
266			for (j = 0; j < MAX_TID_COUNT; j++) {
267				pos += scnprintf(buf + pos, bufsz - pos,
268						"[%d]:\t\t%u", j,
269						station->tid[j].seq_number);
270				pos += scnprintf(buf + pos, bufsz - pos,
271						"\t%u\t\t%u\t\t%u\t\t",
272						station->tid[j].agg.txq_id,
273						station->tid[j].agg.frame_count,
274						station->tid[j].agg.wait_for_ba);
275				pos += scnprintf(buf + pos, bufsz - pos,
276						"%u\t%llu\t%u",
277						station->tid[j].agg.start_idx,
278						(unsigned long long)station->tid[j].agg.bitmap,
279						station->tid[j].agg.rate_n_flags);
280				pos += scnprintf(buf + pos, bufsz - pos, "\n");
281			}
282			pos += scnprintf(buf + pos, bufsz - pos, "\n");
283		}
284	}
285
286	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
287	kfree(buf);
288	return ret;
289}
290
291static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
292				       char __user *user_buf,
293				       size_t count,
294				       loff_t *ppos)
295{
296	ssize_t ret;
297	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
298	int pos = 0, ofs = 0, buf_size = 0;
299	const u8 *ptr;
300	char *buf;
301	size_t eeprom_len = priv->cfg->eeprom_size;
302	buf_size = 4 * eeprom_len + 256;
303
304	if (eeprom_len % 16) {
305		IWL_ERROR("EEPROM size is not multiple of 16.\n");
306		return -ENODATA;
307	}
308
309	/* 4 characters for byte 0xYY */
310	buf = kzalloc(buf_size, GFP_KERNEL);
311	if (!buf) {
312		IWL_ERROR("Can not allocate Buffer\n");
313		return -ENOMEM;
314	}
315
316	ptr = priv->eeprom;
317	for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
318		pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
319		hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
320				   buf_size - pos, 0);
321		pos += strlen(buf);
322		if (buf_size - pos > 0)
323			buf[pos++] = '\n';
324	}
325
326	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
327	kfree(buf);
328	return ret;
329}
330
331static ssize_t iwl_dbgfs_log_event_write(struct file *file,
332					const char __user *user_buf,
333					size_t count, loff_t *ppos)
334{
335	struct iwl_priv *priv = file->private_data;
336	u32 event_log_flag;
337	char buf[8];
338	int buf_size;
339
340	memset(buf, 0, sizeof(buf));
341	buf_size = min(count, sizeof(buf) -  1);
342	if (copy_from_user(buf, user_buf, buf_size))
343		return -EFAULT;
344	if (sscanf(buf, "%d", &event_log_flag) != 1)
345		return -EFAULT;
346	if (event_log_flag == 1)
347		iwl_dump_nic_event_log(priv);
348
349	return count;
350}
351
352DEBUGFS_READ_WRITE_FILE_OPS(sram);
353DEBUGFS_WRITE_FILE_OPS(log_event);
354DEBUGFS_READ_FILE_OPS(eeprom);
355DEBUGFS_READ_FILE_OPS(stations);
356DEBUGFS_READ_FILE_OPS(rx_statistics);
357DEBUGFS_READ_FILE_OPS(tx_statistics);
358
359/*
360 * Create the debugfs files and directories
361 *
362 */
363int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
364{
365	struct iwl_debugfs *dbgfs;
366	struct dentry *phyd = priv->hw->wiphy->debugfsdir;
367	int ret = 0;
368
369	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
370	if (!dbgfs) {
371		ret = -ENOMEM;
372		goto err;
373	}
374
375	priv->dbgfs = dbgfs;
376	dbgfs->name = name;
377	dbgfs->dir_drv = debugfs_create_dir(name, phyd);
378	if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
379		ret = -ENOENT;
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	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
392	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
393			 &priv->disable_chain_noise_cal);
394	DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
395	return 0;
396
397err:
398	IWL_ERROR("Can't open the debugfs directory\n");
399	iwl_dbgfs_unregister(priv);
400	return ret;
401}
402EXPORT_SYMBOL(iwl_dbgfs_register);
403
404/**
405 * Remove the debugfs files and directories
406 *
407 */
408void iwl_dbgfs_unregister(struct iwl_priv *priv)
409{
410	if (!priv->dbgfs)
411		return;
412
413	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
414	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
415	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
416	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
417	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
418	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
419	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
420	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
421	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
422	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
423	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
424	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
425	kfree(priv->dbgfs);
426	priv->dbgfs = NULL;
427}
428EXPORT_SYMBOL(iwl_dbgfs_unregister);
429
430
431
432