iwl-debugfs.c revision 445c2dff409ef9de5d2f964d20917ab238fd266f 
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_READ_WRITE_FILE_OPS(name)                               \
96	DEBUGFS_READ_FUNC(name);                                        \
97	DEBUGFS_WRITE_FUNC(name);                                       \
98static const struct file_operations iwl_dbgfs_##name##_ops = {          \
99	.write = iwl_dbgfs_##name##_write,                              \
100	.read = iwl_dbgfs_##name##_read,                                \
101	.open = iwl_dbgfs_open_file_generic,                            \
102};
103
104
105static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
106						char __user *user_buf,
107						size_t count, loff_t *ppos) {
108
109	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
110	char buf[256];
111	int pos = 0;
112	const size_t bufsz = sizeof(buf);
113
114	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
115						priv->tx_stats[0].cnt);
116	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
117						priv->tx_stats[1].cnt);
118	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
119						priv->tx_stats[2].cnt);
120
121	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
122}
123
124static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
125						char __user *user_buf,
126						size_t count, loff_t *ppos) {
127
128	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
129	char buf[256];
130	int pos = 0;
131	const size_t bufsz = sizeof(buf);
132
133	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
134						priv->rx_stats[0].cnt);
135	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
136						priv->rx_stats[1].cnt);
137	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
138						priv->rx_stats[2].cnt);
139
140	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
141}
142
143#define BYTE1_MASK 0x000000ff;
144#define BYTE2_MASK 0x0000ffff;
145#define BYTE3_MASK 0x00ffffff;
146static ssize_t iwl_dbgfs_sram_read(struct file *file,
147					char __user *user_buf,
148					size_t count, loff_t *ppos)
149{
150	u32 val;
151	char buf[1024];
152	ssize_t ret;
153	int i;
154	int pos = 0;
155	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
156	const size_t bufsz = sizeof(buf);
157
158	printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
159	priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
160
161	iwl_grab_nic_access(priv);
162	for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
163		val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
164					priv->dbgfs->sram_len - i);
165		if (i < 4) {
166			switch (i) {
167			case 1:
168				val &= BYTE1_MASK;
169				break;
170			case 2:
171				val &= BYTE2_MASK;
172				break;
173			case 3:
174				val &= BYTE3_MASK;
175				break;
176			}
177		}
178		pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
179	}
180	pos += scnprintf(buf + pos, bufsz - pos, "\n");
181	iwl_release_nic_access(priv);
182
183	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
184	return ret;
185}
186
187static ssize_t iwl_dbgfs_sram_write(struct file *file,
188					const char __user *user_buf,
189					size_t count, loff_t *ppos)
190{
191	struct iwl_priv *priv = file->private_data;
192	char buf[64];
193	int buf_size;
194	u32 offset, len;
195
196	memset(buf, 0, sizeof(buf));
197	buf_size = min(count, sizeof(buf) -  1);
198	if (copy_from_user(buf, user_buf, buf_size))
199		return -EFAULT;
200
201	if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
202		priv->dbgfs->sram_offset = offset;
203		priv->dbgfs->sram_len = len;
204	} else {
205		priv->dbgfs->sram_offset = 0;
206		priv->dbgfs->sram_len = 0;
207	}
208
209	return count;
210}
211
212static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
213					size_t count, loff_t *ppos)
214{
215	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
216	struct iwl_station_entry *station;
217	int max_sta = priv->hw_params.max_stations;
218	char *buf;
219	int i, j, pos = 0;
220	ssize_t ret;
221	/* Add 30 for initial string */
222	const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
223	DECLARE_MAC_BUF(mac);
224
225	buf = kmalloc(bufsz, GFP_KERNEL);
226	if(!buf)
227		return -ENOMEM;
228
229	pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
230			priv->num_stations);
231
232	for (i = 0; i < max_sta; i++) {
233		station = &priv->stations[i];
234		if (station->used) {
235			pos += scnprintf(buf + pos, bufsz - pos,
236					"station %d:\ngeneral data:\n", i+1);
237			print_mac(mac, station->sta.sta.addr);
238			pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
239					station->sta.sta.sta_id);
240			pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
241					station->sta.mode);
242			pos += scnprintf(buf + pos, bufsz - pos,
243					"flags: 0x%x\n",
244					station->sta.station_flags_msk);
245			pos += scnprintf(buf + pos, bufsz - pos,
246					"ps_status: %u\n", station->ps_status);
247			pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
248			pos += scnprintf(buf + pos, bufsz - pos,
249					"seq_num\t\ttxq_id");
250#ifdef CONFIG_IWL4965_HT
251			pos += scnprintf(buf + pos, bufsz - pos,
252					"\tframe_count\twait_for_ba\t");
253			pos += scnprintf(buf + pos, bufsz - pos,
254					"start_idx\tbitmap0\t");
255			pos += scnprintf(buf + pos, bufsz - pos,
256					"bitmap1\trate_n_flags");
257#endif
258			pos += scnprintf(buf + pos, bufsz - pos, "\n");
259
260			for (j = 0; j < MAX_TID_COUNT; j++) {
261				pos += scnprintf(buf + pos, bufsz - pos,
262						"[%d]:\t\t%u", j,
263						station->tid[j].seq_number);
264#ifdef CONFIG_IWL4965_HT
265				pos += scnprintf(buf + pos, bufsz - pos,
266						"\t%u\t\t%u\t\t%u\t\t",
267						station->tid[j].agg.txq_id,
268						station->tid[j].agg.frame_count,
269						station->tid[j].agg.wait_for_ba);
270				pos += scnprintf(buf + pos, bufsz - pos,
271						"%u\t%llu\t%u",
272						station->tid[j].agg.start_idx,
273						(unsigned long long)station->tid[j].agg.bitmap,
274						station->tid[j].agg.rate_n_flags);
275#endif
276				pos += scnprintf(buf + pos, bufsz - pos, "\n");
277			}
278			pos += scnprintf(buf + pos, bufsz - pos, "\n");
279		}
280	}
281
282	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
283	kfree(buf);
284	return ret;
285}
286
287static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
288				       char __user *user_buf,
289				       size_t count,
290				       loff_t *ppos)
291{
292	ssize_t ret;
293	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
294	int pos = 0, ofs = 0, buf_size = 0;
295	const u8 *ptr;
296	char *buf;
297	size_t eeprom_len = priv->cfg->eeprom_size;
298	buf_size = 4 * eeprom_len + 256;
299
300	if (eeprom_len % 16) {
301		IWL_ERROR("EEPROM size is not multiple of 16.\n");
302		return -ENODATA;
303	}
304
305	/* 4 characters for byte 0xYY */
306	buf = kzalloc(buf_size, GFP_KERNEL);
307	if (!buf) {
308		IWL_ERROR("Can not allocate Buffer\n");
309		return -ENOMEM;
310	}
311
312	ptr = priv->eeprom;
313	for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
314		pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
315		hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
316				   buf_size - pos, 0);
317		pos += strlen(buf);
318		if (buf_size - pos > 0)
319			buf[pos++] = '\n';
320	}
321
322	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
323	kfree(buf);
324	return ret;
325}
326
327DEBUGFS_READ_WRITE_FILE_OPS(sram);
328DEBUGFS_READ_FILE_OPS(eeprom);
329DEBUGFS_READ_FILE_OPS(stations);
330DEBUGFS_READ_FILE_OPS(rx_statistics);
331DEBUGFS_READ_FILE_OPS(tx_statistics);
332
333/*
334 * Create the debugfs files and directories
335 *
336 */
337int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
338{
339	struct iwl_debugfs *dbgfs;
340
341	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
342	if (!dbgfs) {
343		goto err;
344	}
345
346	priv->dbgfs = dbgfs;
347	dbgfs->name = name;
348	dbgfs->dir_drv = debugfs_create_dir(name, NULL);
349	if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
350		goto err;
351	}
352
353	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
354	DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
355	DEBUGFS_ADD_FILE(eeprom, data);
356	DEBUGFS_ADD_FILE(sram, data);
357	DEBUGFS_ADD_FILE(stations, data);
358	DEBUGFS_ADD_FILE(rx_statistics, data);
359	DEBUGFS_ADD_FILE(tx_statistics, data);
360#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
361	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
362	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
363			 &priv->disable_chain_noise_cal);
364#endif  /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
365	return 0;
366
367err:
368	IWL_ERROR("Can't open the debugfs directory\n");
369	iwl_dbgfs_unregister(priv);
370	return -ENOENT;
371}
372EXPORT_SYMBOL(iwl_dbgfs_register);
373
374/**
375 * Remove the debugfs files and directories
376 *
377 */
378void iwl_dbgfs_unregister(struct iwl_priv *priv)
379{
380	if (!(priv->dbgfs))
381		return;
382
383	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
384	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
385	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
386	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
387	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
388	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
389#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
390	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
391	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
392#endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
393	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
394	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
395	kfree(priv->dbgfs);
396	priv->dbgfs = NULL;
397}
398EXPORT_SYMBOL(iwl_dbgfs_unregister);
399
400
401
402