iwl-debugfs.c revision 759ef89fb096c4a6ef078d3cfd5682ac037bd789 
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_REMOVE(name)  do {              \
67	debugfs_remove(name);                   \
68	name = NULL;                            \
69} while (0);
70
71/* file operation */
72#define DEBUGFS_READ_FUNC(name)                                         \
73static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
74					char __user *user_buf,          \
75					size_t count, loff_t *ppos);
76
77#define DEBUGFS_WRITE_FUNC(name)                                        \
78static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
79					const char __user *user_buf,    \
80					size_t count, loff_t *ppos);
81
82
83static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
84{
85	file->private_data = inode->i_private;
86	return 0;
87}
88
89#define DEBUGFS_READ_FILE_OPS(name)                                     \
90	DEBUGFS_READ_FUNC(name);                                        \
91static const struct file_operations iwl_dbgfs_##name##_ops = {          \
92	.read = iwl_dbgfs_##name##_read,                       		\
93	.open = iwl_dbgfs_open_file_generic,                    	\
94};
95
96#define DEBUGFS_WRITE_FILE_OPS(name)                                    \
97	DEBUGFS_WRITE_FUNC(name);                                       \
98static const struct file_operations iwl_dbgfs_##name##_ops = {          \
99	.write = iwl_dbgfs_##name##_write,                              \
100	.open = iwl_dbgfs_open_file_generic,                    	\
101};
102
103
104#define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
105	DEBUGFS_READ_FUNC(name);                                        \
106	DEBUGFS_WRITE_FUNC(name);                                       \
107static const struct file_operations iwl_dbgfs_##name##_ops = {          \
108	.write = iwl_dbgfs_##name##_write,                              \
109	.read = iwl_dbgfs_##name##_read,                                \
110	.open = iwl_dbgfs_open_file_generic,                            \
111};
112
113
114static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
115						char __user *user_buf,
116						size_t count, loff_t *ppos) {
117
118	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
119	char buf[256];
120	int pos = 0;
121	const size_t bufsz = sizeof(buf);
122
123	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
124						priv->tx_stats[0].cnt);
125	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
126						priv->tx_stats[1].cnt);
127	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
128						priv->tx_stats[2].cnt);
129
130	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
131}
132
133static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
134						char __user *user_buf,
135						size_t count, loff_t *ppos) {
136
137	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
138	char buf[256];
139	int pos = 0;
140	const size_t bufsz = sizeof(buf);
141
142	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
143						priv->rx_stats[0].cnt);
144	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
145						priv->rx_stats[1].cnt);
146	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
147						priv->rx_stats[2].cnt);
148
149	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
150}
151
152#define BYTE1_MASK 0x000000ff;
153#define BYTE2_MASK 0x0000ffff;
154#define BYTE3_MASK 0x00ffffff;
155static ssize_t iwl_dbgfs_sram_read(struct file *file,
156					char __user *user_buf,
157					size_t count, loff_t *ppos)
158{
159	u32 val;
160	char buf[1024];
161	ssize_t ret;
162	int i;
163	int pos = 0;
164	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
165	const size_t bufsz = sizeof(buf);
166
167	printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
168	priv->dbgfs->sram_offset, priv->dbgfs->sram_len);
169
170	iwl_grab_nic_access(priv);
171	for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
172		val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
173					priv->dbgfs->sram_len - i);
174		if (i < 4) {
175			switch (i) {
176			case 1:
177				val &= BYTE1_MASK;
178				break;
179			case 2:
180				val &= BYTE2_MASK;
181				break;
182			case 3:
183				val &= BYTE3_MASK;
184				break;
185			}
186		}
187		pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
188	}
189	pos += scnprintf(buf + pos, bufsz - pos, "\n");
190	iwl_release_nic_access(priv);
191
192	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
193	return ret;
194}
195
196static ssize_t iwl_dbgfs_sram_write(struct file *file,
197					const char __user *user_buf,
198					size_t count, loff_t *ppos)
199{
200	struct iwl_priv *priv = file->private_data;
201	char buf[64];
202	int buf_size;
203	u32 offset, len;
204
205	memset(buf, 0, sizeof(buf));
206	buf_size = min(count, sizeof(buf) -  1);
207	if (copy_from_user(buf, user_buf, buf_size))
208		return -EFAULT;
209
210	if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
211		priv->dbgfs->sram_offset = offset;
212		priv->dbgfs->sram_len = len;
213	} else {
214		priv->dbgfs->sram_offset = 0;
215		priv->dbgfs->sram_len = 0;
216	}
217
218	return count;
219}
220
221static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
222					size_t count, loff_t *ppos)
223{
224	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
225	struct iwl_station_entry *station;
226	int max_sta = priv->hw_params.max_stations;
227	char *buf;
228	int i, j, pos = 0;
229	ssize_t ret;
230	/* Add 30 for initial string */
231	const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
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			pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
246					station->sta.sta.sta_id);
247			pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
248					station->sta.mode);
249			pos += scnprintf(buf + pos, bufsz - pos,
250					"flags: 0x%x\n",
251					station->sta.station_flags_msk);
252			pos += scnprintf(buf + pos, bufsz - pos,
253					"ps_status: %u\n", station->ps_status);
254			pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
255			pos += scnprintf(buf + pos, bufsz - pos,
256					"seq_num\t\ttxq_id");
257			pos += scnprintf(buf + pos, bufsz - pos,
258					"\tframe_count\twait_for_ba\t");
259			pos += scnprintf(buf + pos, bufsz - pos,
260					"start_idx\tbitmap0\t");
261			pos += scnprintf(buf + pos, bufsz - pos,
262					"bitmap1\trate_n_flags");
263			pos += scnprintf(buf + pos, bufsz - pos, "\n");
264
265			for (j = 0; j < MAX_TID_COUNT; j++) {
266				pos += scnprintf(buf + pos, bufsz - pos,
267						"[%d]:\t\t%u", j,
268						station->tid[j].seq_number);
269				pos += scnprintf(buf + pos, bufsz - pos,
270						"\t%u\t\t%u\t\t%u\t\t",
271						station->tid[j].agg.txq_id,
272						station->tid[j].agg.frame_count,
273						station->tid[j].agg.wait_for_ba);
274				pos += scnprintf(buf + pos, bufsz - pos,
275						"%u\t%llu\t%u",
276						station->tid[j].agg.start_idx,
277						(unsigned long long)station->tid[j].agg.bitmap,
278						station->tid[j].agg.rate_n_flags);
279				pos += scnprintf(buf + pos, bufsz - pos, "\n");
280			}
281			pos += scnprintf(buf + pos, bufsz - pos, "\n");
282		}
283	}
284
285	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
286	kfree(buf);
287	return ret;
288}
289
290static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
291				       char __user *user_buf,
292				       size_t count,
293				       loff_t *ppos)
294{
295	ssize_t ret;
296	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
297	int pos = 0, ofs = 0, buf_size = 0;
298	const u8 *ptr;
299	char *buf;
300	size_t eeprom_len = priv->cfg->eeprom_size;
301	buf_size = 4 * eeprom_len + 256;
302
303	if (eeprom_len % 16) {
304		IWL_ERROR("EEPROM size is not multiple of 16.\n");
305		return -ENODATA;
306	}
307
308	/* 4 characters for byte 0xYY */
309	buf = kzalloc(buf_size, GFP_KERNEL);
310	if (!buf) {
311		IWL_ERROR("Can not allocate Buffer\n");
312		return -ENOMEM;
313	}
314
315	ptr = priv->eeprom;
316	for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
317		pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
318		hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
319				   buf_size - pos, 0);
320		pos += strlen(buf);
321		if (buf_size - pos > 0)
322			buf[pos++] = '\n';
323	}
324
325	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
326	kfree(buf);
327	return ret;
328}
329
330static ssize_t iwl_dbgfs_log_event_write(struct file *file,
331					const char __user *user_buf,
332					size_t count, loff_t *ppos)
333{
334	struct iwl_priv *priv = file->private_data;
335	u32 event_log_flag;
336	char buf[8];
337	int buf_size;
338
339	memset(buf, 0, sizeof(buf));
340	buf_size = min(count, sizeof(buf) -  1);
341	if (copy_from_user(buf, user_buf, buf_size))
342		return -EFAULT;
343	if (sscanf(buf, "%d", &event_log_flag) != 1)
344		return -EFAULT;
345	if (event_log_flag == 1)
346		iwl_dump_nic_event_log(priv);
347
348	return count;
349}
350
351
352
353static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf,
354				       size_t count, loff_t *ppos)
355{
356	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
357	struct ieee80211_channel *channels = NULL;
358	const struct ieee80211_supported_band *supp_band = NULL;
359	int pos = 0, i, bufsz = PAGE_SIZE;
360	char *buf;
361	ssize_t ret;
362
363	if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
364		return -EAGAIN;
365
366	buf = kzalloc(bufsz, GFP_KERNEL);
367	if (!buf) {
368		IWL_ERROR("Can not allocate Buffer\n");
369		return -ENOMEM;
370	}
371
372	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
373	channels = supp_band->channels;
374
375	pos += scnprintf(buf + pos, bufsz - pos,
376			"Displaying %d channels in 2.4GHz band 802.11bg):\n",
377			 supp_band->n_channels);
378
379	for (i = 0; i < supp_band->n_channels; i++)
380		pos += scnprintf(buf + pos, bufsz - pos,
381				"%d: %ddBm: BSS%s%s, %s.\n",
382				ieee80211_frequency_to_channel(
383				channels[i].center_freq),
384				channels[i].max_power,
385				channels[i].flags & IEEE80211_CHAN_RADAR ?
386				" (IEEE 802.11h required)" : "",
387				(!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
388				|| (channels[i].flags &
389				IEEE80211_CHAN_RADAR)) ? "" :
390				", IBSS",
391				channels[i].flags &
392				IEEE80211_CHAN_PASSIVE_SCAN ?
393				"passive only" : "active/passive");
394
395	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
396	channels = supp_band->channels;
397
398	pos += scnprintf(buf + pos, bufsz - pos,
399			"Displaying %d channels in 5.2GHz band (802.11a)\n",
400			supp_band->n_channels);
401
402	for (i = 0; i < supp_band->n_channels; i++)
403		pos += scnprintf(buf + pos, bufsz - pos,
404				"%d: %ddBm: BSS%s%s, %s.\n",
405				ieee80211_frequency_to_channel(
406				channels[i].center_freq),
407				channels[i].max_power,
408				channels[i].flags & IEEE80211_CHAN_RADAR ?
409				" (IEEE 802.11h required)" : "",
410				((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
411				|| (channels[i].flags &
412				IEEE80211_CHAN_RADAR)) ? "" :
413				", IBSS",
414				channels[i].flags &
415				IEEE80211_CHAN_PASSIVE_SCAN ?
416				"passive only" : "active/passive");
417
418	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
419	kfree(buf);
420	return ret;
421}
422
423
424DEBUGFS_READ_WRITE_FILE_OPS(sram);
425DEBUGFS_WRITE_FILE_OPS(log_event);
426DEBUGFS_READ_FILE_OPS(eeprom);
427DEBUGFS_READ_FILE_OPS(stations);
428DEBUGFS_READ_FILE_OPS(rx_statistics);
429DEBUGFS_READ_FILE_OPS(tx_statistics);
430DEBUGFS_READ_FILE_OPS(channels);
431
432/*
433 * Create the debugfs files and directories
434 *
435 */
436int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
437{
438	struct iwl_debugfs *dbgfs;
439	struct dentry *phyd = priv->hw->wiphy->debugfsdir;
440	int ret = 0;
441
442	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
443	if (!dbgfs) {
444		ret = -ENOMEM;
445		goto err;
446	}
447
448	priv->dbgfs = dbgfs;
449	dbgfs->name = name;
450	dbgfs->dir_drv = debugfs_create_dir(name, phyd);
451	if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
452		ret = -ENOENT;
453		goto err;
454	}
455
456	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
457	DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
458	DEBUGFS_ADD_FILE(eeprom, data);
459	DEBUGFS_ADD_FILE(sram, data);
460	DEBUGFS_ADD_FILE(log_event, data);
461	DEBUGFS_ADD_FILE(stations, data);
462	DEBUGFS_ADD_FILE(rx_statistics, data);
463	DEBUGFS_ADD_FILE(tx_statistics, data);
464	DEBUGFS_ADD_FILE(channels, data);
465	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
466	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
467			 &priv->disable_chain_noise_cal);
468	DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
469	return 0;
470
471err:
472	IWL_ERROR("Can't open the debugfs directory\n");
473	iwl_dbgfs_unregister(priv);
474	return ret;
475}
476EXPORT_SYMBOL(iwl_dbgfs_register);
477
478/**
479 * Remove the debugfs files and directories
480 *
481 */
482void iwl_dbgfs_unregister(struct iwl_priv *priv)
483{
484	if (!priv->dbgfs)
485		return;
486
487	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
488	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
489	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
490	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
491	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
492	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
493	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels);
494	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
495	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
496	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
497	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
498	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
499	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
500	kfree(priv->dbgfs);
501	priv->dbgfs = NULL;
502}
503EXPORT_SYMBOL(iwl_dbgfs_unregister);
504
505
506
507