drivers/net/wireless/iwlwifi/iwl-debugfs.c - fp2-dev/kernel/msm - Gitiles

 /******************************************************************************
  *
  * GPL LICENSE SUMMARY
  *
  * Copyright(c) 2008 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  * USA
  *
  * The full GNU General Public License is included in this distribution
  * in the file called LICENSE.GPL.
  *
  * Contact Information:
  * Tomas Winkler <tomas.winkler@intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *****************************************************************************/

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/debugfs.h>

 #include <linux/ieee80211.h>
 #include <net/mac80211.h>


 #include "iwl-dev.h"
 #include "iwl-debug.h"
 #include "iwl-core.h"
 #include "iwl-io.h"


 /* create and remove of files */
 #define DEBUGFS_ADD_DIR(name, parent) do {                              \
 	dbgfs->dir_##name = debugfs_create_dir(#name, parent);          \
 	if (!(dbgfs->dir_##name))                                       \
 		goto err; 						\
 } while (0)

 #define DEBUGFS_ADD_FILE(name, parent) do {                             \
 	dbgfs->dbgfs_##parent##_files.file_##name =                     \
 	debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
 				&iwl_dbgfs_##name##_ops);               \
 	if (!(dbgfs->dbgfs_##parent##_files.file_##name))               \
 		goto err;                                               \
 } while (0)

 #define DEBUGFS_ADD_BOOL(name, parent, ptr) do {                        \
 	dbgfs->dbgfs_##parent##_files.file_##name =                     \
 	debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr);     \
 	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name))          \
 		goto err;                                               \
 } while (0)

 #define DEBUGFS_REMOVE(name)  do {              \
 	debugfs_remove(name);                   \
 	name = NULL;                            \
 } while (0);

 /* file operation */
 #define DEBUGFS_READ_FUNC(name)                                         \
 static ssize_t iwl_dbgfs_##name##_read(struct file *file,               \
 					char __user *user_buf,          \
 					size_t count, loff_t *ppos);

 #define DEBUGFS_WRITE_FUNC(name)                                        \
 static ssize_t iwl_dbgfs_##name##_write(struct file *file,              \
 					const char __user *user_buf,    \
 					size_t count, loff_t *ppos);


 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
 	return 0;
 }

 #define DEBUGFS_READ_FILE_OPS(name)                                     \
 	DEBUGFS_READ_FUNC(name);                                        \
 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 	.read = iwl_dbgfs_##name##_read,                       		\
 	.open = iwl_dbgfs_open_file_generic,                    	\
 };

 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
 	DEBUGFS_WRITE_FUNC(name);                                       \
 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 	.write = iwl_dbgfs_##name##_write,                              \
 	.open = iwl_dbgfs_open_file_generic,                    	\
 };


 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
 	DEBUGFS_READ_FUNC(name);                                        \
 	DEBUGFS_WRITE_FUNC(name);                                       \
 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
 	.write = iwl_dbgfs_##name##_write,                              \
 	.read = iwl_dbgfs_##name##_read,                                \
 	.open = iwl_dbgfs_open_file_generic,                            \
 };


 static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
 						char __user *user_buf,
 						size_t count, loff_t *ppos) {

 	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 	char buf[256];
 	int pos = 0;
 	const size_t bufsz = sizeof(buf);

 	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 						priv->tx_stats[0].cnt);
 	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 						priv->tx_stats[1].cnt);
 	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 						priv->tx_stats[2].cnt);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }

 static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
 						char __user *user_buf,
 						size_t count, loff_t *ppos) {

 	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 	char buf[256];
 	int pos = 0;
 	const size_t bufsz = sizeof(buf);

 	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
 						priv->rx_stats[0].cnt);
 	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
 						priv->rx_stats[1].cnt);
 	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
 						priv->rx_stats[2].cnt);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }

 #define BYTE1_MASK 0x000000ff;
 #define BYTE2_MASK 0x0000ffff;
 #define BYTE3_MASK 0x00ffffff;
 static ssize_t iwl_dbgfs_sram_read(struct file *file,
 					char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	u32 val;
 	char buf[1024];
 	ssize_t ret;
 	int i;
 	int pos = 0;
 	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 	const size_t bufsz = sizeof(buf);

 	printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
 	priv->dbgfs->sram_offset, priv->dbgfs->sram_len);

 	iwl_grab_nic_access(priv);
 	for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
 		val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
 					priv->dbgfs->sram_len - i);
 		if (i < 4) {
 			switch (i) {
 			case 1:
 				val &= BYTE1_MASK;
 				break;
 			case 2:
 				val &= BYTE2_MASK;
 				break;
 			case 3:
 				val &= BYTE3_MASK;
 				break;
 			}
 		}
 		pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
 	}
 	pos += scnprintf(buf + pos, bufsz - pos, "\n");
 	iwl_release_nic_access(priv);

 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 	return ret;
 }

 static ssize_t iwl_dbgfs_sram_write(struct file *file,
 					const char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	struct iwl_priv *priv = file->private_data;
 	char buf[64];
 	int buf_size;
 	u32 offset, len;

 	memset(buf, 0, sizeof(buf));
 	buf_size = min(count, sizeof(buf) -  1);
 	if (copy_from_user(buf, user_buf, buf_size))
 		return -EFAULT;

 	if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
 		priv->dbgfs->sram_offset = offset;
 		priv->dbgfs->sram_len = len;
 	} else {
 		priv->dbgfs->sram_offset = 0;
 		priv->dbgfs->sram_len = 0;
 	}

 	return count;
 }

 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 	struct iwl_station_entry *station;
 	int max_sta = priv->hw_params.max_stations;
 	char *buf;
 	int i, j, pos = 0;
 	ssize_t ret;
 	/* Add 30 for initial string */
 	const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
 	DECLARE_MAC_BUF(mac);

 	buf = kmalloc(bufsz, GFP_KERNEL);
 	if(!buf)
 		return -ENOMEM;

 	pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
 			priv->num_stations);

 	for (i = 0; i < max_sta; i++) {
 		station = &priv->stations[i];
 		if (station->used) {
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"station %d:\ngeneral data:\n", i+1);
 			print_mac(mac, station->sta.sta.addr);
 			pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
 					station->sta.sta.sta_id);
 			pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
 					station->sta.mode);
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"flags: 0x%x\n",
 					station->sta.station_flags_msk);
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"ps_status: %u\n", station->ps_status);
 			pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"seq_num\t\ttxq_id");
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"\tframe_count\twait_for_ba\t");
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"start_idx\tbitmap0\t");
 			pos += scnprintf(buf + pos, bufsz - pos,
 					"bitmap1\trate_n_flags");
 			pos += scnprintf(buf + pos, bufsz - pos, "\n");

 			for (j = 0; j < MAX_TID_COUNT; j++) {
 				pos += scnprintf(buf + pos, bufsz - pos,
 						"[%d]:\t\t%u", j,
 						station->tid[j].seq_number);
 				pos += scnprintf(buf + pos, bufsz - pos,
 						"\t%u\t\t%u\t\t%u\t\t",
 						station->tid[j].agg.txq_id,
 						station->tid[j].agg.frame_count,
 						station->tid[j].agg.wait_for_ba);
 				pos += scnprintf(buf + pos, bufsz - pos,
 						"%u\t%llu\t%u",
 						station->tid[j].agg.start_idx,
 						(unsigned long long)station->tid[j].agg.bitmap,
 						station->tid[j].agg.rate_n_flags);
 				pos += scnprintf(buf + pos, bufsz - pos, "\n");
 			}
 			pos += scnprintf(buf + pos, bufsz - pos, "\n");
 		}
 	}

 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 	kfree(buf);
 	return ret;
 }

 static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
 				       char __user *user_buf,
 				       size_t count,
 				       loff_t *ppos)
 {
 	ssize_t ret;
 	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
 	int pos = 0, ofs = 0, buf_size = 0;
 	const u8 *ptr;
 	char *buf;
 	size_t eeprom_len = priv->cfg->eeprom_size;
 	buf_size = 4 * eeprom_len + 256;

 	if (eeprom_len % 16) {
 		IWL_ERROR("EEPROM size is not multiple of 16.\n");
 		return -ENODATA;
 	}

 	/* 4 characters for byte 0xYY */
 	buf = kzalloc(buf_size, GFP_KERNEL);
 	if (!buf) {
 		IWL_ERROR("Can not allocate Buffer\n");
 		return -ENOMEM;
 	}

 	ptr = priv->eeprom;
 	for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
 		pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
 		hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
 				   buf_size - pos, 0);
 		pos += strlen(buf);
 		if (buf_size - pos > 0)
 			buf[pos++] = '\n';
 	}

 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 	kfree(buf);
 	return ret;
 }

 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
 					const char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	struct iwl_priv *priv = file->private_data;
 	u32 event_log_flag;
 	char buf[8];
 	int buf_size;

 	memset(buf, 0, sizeof(buf));
 	buf_size = min(count, sizeof(buf) -  1);
 	if (copy_from_user(buf, user_buf, buf_size))
 		return -EFAULT;
 	if (sscanf(buf, "%d", &event_log_flag) != 1)
 		return -EFAULT;
 	if (event_log_flag == 1)
 		iwl_dump_nic_event_log(priv);

 	return count;
 }

 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 DEBUGFS_WRITE_FILE_OPS(log_event);
 DEBUGFS_READ_FILE_OPS(eeprom);
 DEBUGFS_READ_FILE_OPS(stations);
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);

 /*
  * Create the debugfs files and directories
  *
  */
 int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 {
 	struct iwl_debugfs *dbgfs;
 	struct dentry *phyd = priv->hw->wiphy->debugfsdir;

 	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
 	if (!dbgfs) {
 		goto err;
 	}

 	priv->dbgfs = dbgfs;
 	dbgfs->name = name;
 	dbgfs->dir_drv = debugfs_create_dir(name, phyd);
 	if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)){
 		goto err;
 	}

 	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
 	DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
 	DEBUGFS_ADD_FILE(eeprom, data);
 	DEBUGFS_ADD_FILE(sram, data);
 	DEBUGFS_ADD_FILE(log_event, data);
 	DEBUGFS_ADD_FILE(stations, data);
 	DEBUGFS_ADD_FILE(rx_statistics, data);
 	DEBUGFS_ADD_FILE(tx_statistics, data);
 	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 			 &priv->disable_chain_noise_cal);
 	DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
 	return 0;

 err:
 	IWL_ERROR("Can't open the debugfs directory\n");
 	iwl_dbgfs_unregister(priv);
 	return -ENOENT;
 }
 EXPORT_SYMBOL(iwl_dbgfs_register);

 /**
  * Remove the debugfs files and directories
  *
  */
 void iwl_dbgfs_unregister(struct iwl_priv *priv)
 {
 	if (!(priv->dbgfs))
 		return;

 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
 	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
 	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 	kfree(priv->dbgfs);
 	priv->dbgfs = NULL;
 }
 EXPORT_SYMBOL(iwl_dbgfs_unregister);
	/******************************************************************************
	*
	* GPL LICENSE SUMMARY
	*
	* Copyright(c) 2008 Intel Corporation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of version 2 of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	* USA
	*
	* The full GNU General Public License is included in this distribution
	* in the file called LICENSE.GPL.
	*
	* Contact Information:
	* Tomas Winkler <tomas.winkler@intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*****************************************************************************/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/debugfs.h>

	#include <linux/ieee80211.h>
	#include <net/mac80211.h>


	#include "iwl-dev.h"
	#include "iwl-debug.h"
	#include "iwl-core.h"
	#include "iwl-io.h"


	/* create and remove of files */
	#define DEBUGFS_ADD_DIR(name, parent) do { \
	dbgfs->dir_##name = debugfs_create_dir(#name, parent); \
	if (!(dbgfs->dir_##name)) \
	goto err; \
	} while (0)

	#define DEBUGFS_ADD_FILE(name, parent) do { \
	dbgfs->dbgfs_##parent##_files.file_##name = \
	debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv, \
	&iwl_dbgfs_##name##_ops); \
	if (!(dbgfs->dbgfs_##parent##_files.file_##name)) \
	goto err; \
	} while (0)

	#define DEBUGFS_ADD_BOOL(name, parent, ptr) do { \
	dbgfs->dbgfs_##parent##_files.file_##name = \
	debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr); \
	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)) \
	goto err; \
	} while (0)

	#define DEBUGFS_REMOVE(name) do { \
	debugfs_remove(name); \
	name = NULL; \
	} while (0);

	/* file operation */
	#define DEBUGFS_READ_FUNC(name) \
	static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
	char __user *user_buf, \
	size_t count, loff_t *ppos);

	#define DEBUGFS_WRITE_FUNC(name) \
	static ssize_t iwl_dbgfs_##name##_write(struct file *file, \
	const char __user *user_buf, \
	size_t count, loff_t *ppos);


	static int iwl_dbgfs_open_file_generic(struct inode inode, struct file file)
	{
	file->private_data = inode->i_private;
	return 0;
	}

	#define DEBUGFS_READ_FILE_OPS(name) \
	DEBUGFS_READ_FUNC(name); \
	static const struct file_operations iwl_dbgfs_##name##_ops = { \
	.read = iwl_dbgfs_##name##_read, \
	.open = iwl_dbgfs_open_file_generic, \
	};

	#define DEBUGFS_WRITE_FILE_OPS(name) \
	DEBUGFS_WRITE_FUNC(name); \
	static const struct file_operations iwl_dbgfs_##name##_ops = { \
	.write = iwl_dbgfs_##name##_write, \
	.open = iwl_dbgfs_open_file_generic, \
	};


	#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
	DEBUGFS_READ_FUNC(name); \
	DEBUGFS_WRITE_FUNC(name); \
	static const struct file_operations iwl_dbgfs_##name##_ops = { \
	.write = iwl_dbgfs_##name##_write, \
	.read = iwl_dbgfs_##name##_read, \
	.open = iwl_dbgfs_open_file_generic, \
	};


	static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos) {

	struct iwl_priv priv = (struct iwl_priv )file->private_data;
	char buf[256];
	int pos = 0;
	const size_t bufsz = sizeof(buf);

	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
	priv->tx_stats[0].cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
	priv->tx_stats[1].cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
	priv->tx_stats[2].cnt);

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	}

	static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos) {

	struct iwl_priv priv = (struct iwl_priv )file->private_data;
	char buf[256];
	int pos = 0;
	const size_t bufsz = sizeof(buf);

	pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n",
	priv->rx_stats[0].cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n",
	priv->rx_stats[1].cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n",
	priv->rx_stats[2].cnt);

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	}

	#define BYTE1_MASK 0x000000ff;
	#define BYTE2_MASK 0x0000ffff;
	#define BYTE3_MASK 0x00ffffff;
	static ssize_t iwl_dbgfs_sram_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	u32 val;
	char buf[1024];
	ssize_t ret;
	int i;
	int pos = 0;
	struct iwl_priv priv = (struct iwl_priv )file->private_data;
	const size_t bufsz = sizeof(buf);

	printk(KERN_DEBUG "offset is: 0x%x\tlen is: 0x%x\n",
	priv->dbgfs->sram_offset, priv->dbgfs->sram_len);

	iwl_grab_nic_access(priv);
	for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
	val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
	priv->dbgfs->sram_len - i);
	if (i < 4) {
	switch (i) {
	case 1:
	val &= BYTE1_MASK;
	break;
	case 2:
	val &= BYTE2_MASK;
	break;
	case 3:
	val &= BYTE3_MASK;
	break;
	}
	}
	pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
	}
	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	iwl_release_nic_access(priv);

	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	return ret;
	}

	static ssize_t iwl_dbgfs_sram_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct iwl_priv *priv = file->private_data;
	char buf[64];
	int buf_size;
	u32 offset, len;

	memset(buf, 0, sizeof(buf));
	buf_size = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, buf_size))
	return -EFAULT;

	if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
	priv->dbgfs->sram_offset = offset;
	priv->dbgfs->sram_len = len;
	} else {
	priv->dbgfs->sram_offset = 0;
	priv->dbgfs->sram_len = 0;
	}

	return count;
	}

	static ssize_t iwl_dbgfs_stations_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct iwl_priv priv = (struct iwl_priv )file->private_data;
	struct iwl_station_entry *station;
	int max_sta = priv->hw_params.max_stations;
	char *buf;
	int i, j, pos = 0;
	ssize_t ret;
	/* Add 30 for initial string */
	const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations);
	DECLARE_MAC_BUF(mac);

	buf = kmalloc(bufsz, GFP_KERNEL);
	if(!buf)
	return -ENOMEM;

	pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n",
	priv->num_stations);

	for (i = 0; i < max_sta; i++) {
	station = &priv->stations[i];
	if (station->used) {
	pos += scnprintf(buf + pos, bufsz - pos,
	"station %d:\ngeneral data:\n", i+1);
	print_mac(mac, station->sta.sta.addr);
	pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n",
	station->sta.sta.sta_id);
	pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n",
	station->sta.mode);
	pos += scnprintf(buf + pos, bufsz - pos,
	"flags: 0x%x\n",
	station->sta.station_flags_msk);
	pos += scnprintf(buf + pos, bufsz - pos,
	"ps_status: %u\n", station->ps_status);
	pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n");
	pos += scnprintf(buf + pos, bufsz - pos,
	"seq_num\t\ttxq_id");
	pos += scnprintf(buf + pos, bufsz - pos,
	"\tframe_count\twait_for_ba\t");
	pos += scnprintf(buf + pos, bufsz - pos,
	"start_idx\tbitmap0\t");
	pos += scnprintf(buf + pos, bufsz - pos,
	"bitmap1\trate_n_flags");
	pos += scnprintf(buf + pos, bufsz - pos, "\n");

	for (j = 0; j < MAX_TID_COUNT; j++) {
	pos += scnprintf(buf + pos, bufsz - pos,
	"[%d]:\t\t%u", j,
	station->tid[j].seq_number);
	pos += scnprintf(buf + pos, bufsz - pos,
	"\t%u\t\t%u\t\t%u\t\t",
	station->tid[j].agg.txq_id,
	station->tid[j].agg.frame_count,
	station->tid[j].agg.wait_for_ba);
	pos += scnprintf(buf + pos, bufsz - pos,
	"%u\t%llu\t%u",
	station->tid[j].agg.start_idx,
	(unsigned long long)station->tid[j].agg.bitmap,
	station->tid[j].agg.rate_n_flags);
	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	}
	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	}
	}

	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
	}

	static ssize_t iwl_dbgfs_eeprom_read(struct file *file,
	char __user *user_buf,
	size_t count,
	loff_t *ppos)
	{
	ssize_t ret;
	struct iwl_priv priv = (struct iwl_priv )file->private_data;
	int pos = 0, ofs = 0, buf_size = 0;
	const u8 *ptr;
	char *buf;
	size_t eeprom_len = priv->cfg->eeprom_size;
	buf_size = 4 * eeprom_len + 256;

	if (eeprom_len % 16) {
	IWL_ERROR("EEPROM size is not multiple of 16.\n");
	return -ENODATA;
	}

	/* 4 characters for byte 0xYY */
	buf = kzalloc(buf_size, GFP_KERNEL);
	if (!buf) {
	IWL_ERROR("Can not allocate Buffer\n");
	return -ENOMEM;
	}

	ptr = priv->eeprom;
	for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) {
	pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs);
	hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos,
	buf_size - pos, 0);
	pos += strlen(buf);
	if (buf_size - pos > 0)
	buf[pos++] = '\n';
	}

	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
	}

	static ssize_t iwl_dbgfs_log_event_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct iwl_priv *priv = file->private_data;
	u32 event_log_flag;
	char buf[8];
	int buf_size;

	memset(buf, 0, sizeof(buf));
	buf_size = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, buf_size))
	return -EFAULT;
	if (sscanf(buf, "%d", &event_log_flag) != 1)
	return -EFAULT;
	if (event_log_flag == 1)
	iwl_dump_nic_event_log(priv);

	return count;
	}

	DEBUGFS_READ_WRITE_FILE_OPS(sram);
	DEBUGFS_WRITE_FILE_OPS(log_event);
	DEBUGFS_READ_FILE_OPS(eeprom);
	DEBUGFS_READ_FILE_OPS(stations);
	DEBUGFS_READ_FILE_OPS(rx_statistics);
	DEBUGFS_READ_FILE_OPS(tx_statistics);

	/*
	* Create the debugfs files and directories
	*
	*/
	int iwl_dbgfs_register(struct iwl_priv priv, const char name)
	{
	struct iwl_debugfs *dbgfs;
	struct dentry *phyd = priv->hw->wiphy->debugfsdir;

	dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
	if (!dbgfs) {
	goto err;
	}

	priv->dbgfs = dbgfs;
	dbgfs->name = name;
	dbgfs->dir_drv = debugfs_create_dir(name, phyd);
	if (!dbgfs->dir_drv \|\| IS_ERR(dbgfs->dir_drv)){
	goto err;
	}

	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
	DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
	DEBUGFS_ADD_FILE(eeprom, data);
	DEBUGFS_ADD_FILE(sram, data);
	DEBUGFS_ADD_FILE(log_event, data);
	DEBUGFS_ADD_FILE(stations, data);
	DEBUGFS_ADD_FILE(rx_statistics, data);
	DEBUGFS_ADD_FILE(tx_statistics, data);
	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
	&priv->disable_chain_noise_cal);
	DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
	return 0;

	err:
	IWL_ERROR("Can't open the debugfs directory\n");
	iwl_dbgfs_unregister(priv);
	return -ENOENT;
	}
	EXPORT_SYMBOL(iwl_dbgfs_register);

	/**
	* Remove the debugfs files and directories
	*
	*/
	void iwl_dbgfs_unregister(struct iwl_priv *priv)
	{
	if (!(priv->dbgfs))
	return;

	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_eeprom);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
	kfree(priv->dbgfs);
	priv->dbgfs = NULL;
	}
	EXPORT_SYMBOL(iwl_dbgfs_unregister);