iwl-debugfs.c

/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2009 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:
 *  Intel Linux Wireless <ilw@linux.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, S_IWUSR | S_IRUSR,                   \
				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, S_IWUSR | S_IRUSR,                   \
			    dbgfs->dir_##parent, ptr);                  \
	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)		\
			|| !dbgfs->dbgfs_##parent##_files.file_##name)	\
		goto err;                                               \
} while (0)

#define DEBUGFS_ADD_X32(name, parent, ptr) do {                        \
	dbgfs->dbgfs_##parent##_files.file_##name =                     \
	debugfs_create_x32(#name, S_IRUSR, dbgfs->dir_##parent, ptr);   \
	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)		\
			|| !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;
	int pos = 0;

	int cnt;
	ssize_t ret;
	const size_t bufsz = 100 + sizeof(char) * 24 * (MANAGEMENT_MAX + CONTROL_MAX);
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	pos += scnprintf(buf + pos, bufsz - pos, "Management:\n");
	for (cnt = 0; cnt < MANAGEMENT_MAX; cnt++) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "\t%s\t\t: %u\n",
				 get_mgmt_string(cnt),
				 priv->tx_stats.mgmt[cnt]);
	}
	pos += scnprintf(buf + pos, bufsz - pos, "Control\n");
	for (cnt = 0; cnt < CONTROL_MAX; cnt++) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "\t%s\t\t: %u\n",
				 get_ctrl_string(cnt),
				 priv->tx_stats.ctrl[cnt]);
	}
	pos += scnprintf(buf + pos, bufsz - pos, "Data:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "\tcnt: %u\n",
			 priv->tx_stats.data_cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "\tbytes: %llu\n",
			 priv->tx_stats.data_bytes);
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
}

static ssize_t iwl_dbgfs_tx_statistics_write(struct file *file,
					const char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = file->private_data;
	u32 clear_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, "%x", &clear_flag) != 1)
		return -EFAULT;
	if (clear_flag == 1)
		iwl_clear_tx_stats(priv);

	return count;
}

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;
	int pos = 0;
	int cnt;
	ssize_t ret;
	const size_t bufsz = 100 +
		sizeof(char) * 24 * (MANAGEMENT_MAX + CONTROL_MAX);
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	pos += scnprintf(buf + pos, bufsz - pos, "Management:\n");
	for (cnt = 0; cnt < MANAGEMENT_MAX; cnt++) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "\t%s\t\t: %u\n",
				 get_mgmt_string(cnt),
				 priv->rx_stats.mgmt[cnt]);
	}
	pos += scnprintf(buf + pos, bufsz - pos, "Control:\n");
	for (cnt = 0; cnt < CONTROL_MAX; cnt++) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "\t%s\t\t: %u\n",
				 get_ctrl_string(cnt),
				 priv->rx_stats.ctrl[cnt]);
	}
	pos += scnprintf(buf + pos, bufsz - pos, "Data:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "\tcnt: %u\n",
			 priv->rx_stats.data_cnt);
	pos += scnprintf(buf + pos, bufsz - pos, "\tbytes: %llu\n",
			 priv->rx_stats.data_bytes);

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

static ssize_t iwl_dbgfs_rx_statistics_write(struct file *file,
					const char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = file->private_data;
	u32 clear_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, "%x", &clear_flag) != 1)
		return -EFAULT;
	if (clear_flag == 1)
		iwl_clear_rx_stats(priv);
	return count;
}

#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);

	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");

	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);

	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);
			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_nvm_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_ERR(priv, "NVM size is not multiple of 16.\n");
		return -ENODATA;
	}

	ptr = priv->eeprom;
	if (!ptr) {
		IWL_ERR(priv, "Invalid EEPROM/OTP memory\n");
		return -ENOMEM;
	}

	/* 4 characters for byte 0xYY */
	buf = kzalloc(buf_size, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}
	pos += scnprintf(buf + pos, buf_size - pos, "NVM Type: %s\n",
			(priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
			? "OTP" : "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;
}



static ssize_t iwl_dbgfs_channels_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 ieee80211_channel *channels = NULL;
	const struct ieee80211_supported_band *supp_band = NULL;
	int pos = 0, i, bufsz = PAGE_SIZE;
	char *buf;
	ssize_t ret;

	if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
		return -EAGAIN;

	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}

	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
	if (supp_band) {
		channels = supp_band->channels;

		pos += scnprintf(buf + pos, bufsz - pos,
				"Displaying %d channels in 2.4GHz band 802.11bg):\n",
				supp_band->n_channels);

		for (i = 0; i < supp_band->n_channels; i++)
			pos += scnprintf(buf + pos, bufsz - pos,
					"%d: %ddBm: BSS%s%s, %s.\n",
					ieee80211_frequency_to_channel(
					channels[i].center_freq),
					channels[i].max_power,
					channels[i].flags & IEEE80211_CHAN_RADAR ?
					" (IEEE 802.11h required)" : "",
					((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
					|| (channels[i].flags &
					IEEE80211_CHAN_RADAR)) ? "" :
					", IBSS",
					channels[i].flags &
					IEEE80211_CHAN_PASSIVE_SCAN ?
					"passive only" : "active/passive");
	}
	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
	if (supp_band) {
		channels = supp_band->channels;

		pos += scnprintf(buf + pos, bufsz - pos,
				"Displaying %d channels in 5.2GHz band (802.11a)\n",
				supp_band->n_channels);

		for (i = 0; i < supp_band->n_channels; i++)
			pos += scnprintf(buf + pos, bufsz - pos,
					"%d: %ddBm: BSS%s%s, %s.\n",
					ieee80211_frequency_to_channel(
					channels[i].center_freq),
					channels[i].max_power,
					channels[i].flags & IEEE80211_CHAN_RADAR ?
					" (IEEE 802.11h required)" : "",
					((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
					|| (channels[i].flags &
					IEEE80211_CHAN_RADAR)) ? "" :
					", IBSS",
					channels[i].flags &
					IEEE80211_CHAN_PASSIVE_SCAN ?
					"passive only" : "active/passive");
	}
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
}

static ssize_t iwl_dbgfs_status_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[512];
	int pos = 0;
	const size_t bufsz = sizeof(buf);

	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_HCMD_ACTIVE:\t %d\n",
		test_bit(STATUS_HCMD_ACTIVE, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_HCMD_SYNC_ACTIVE: %d\n",
		test_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_INT_ENABLED:\t %d\n",
		test_bit(STATUS_INT_ENABLED, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_RF_KILL_HW:\t %d\n",
		test_bit(STATUS_RF_KILL_HW, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_INIT:\t\t %d\n",
		test_bit(STATUS_INIT, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_ALIVE:\t\t %d\n",
		test_bit(STATUS_ALIVE, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_READY:\t\t %d\n",
		test_bit(STATUS_READY, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_TEMPERATURE:\t %d\n",
		test_bit(STATUS_TEMPERATURE, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_GEO_CONFIGURED:\t %d\n",
		test_bit(STATUS_GEO_CONFIGURED, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_EXIT_PENDING:\t %d\n",
		test_bit(STATUS_EXIT_PENDING, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_STATISTICS:\t %d\n",
		test_bit(STATUS_STATISTICS, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCANNING:\t %d\n",
		test_bit(STATUS_SCANNING, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCAN_ABORTING:\t %d\n",
		test_bit(STATUS_SCAN_ABORTING, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCAN_HW:\t\t %d\n",
		test_bit(STATUS_SCAN_HW, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_POWER_PMI:\t %d\n",
		test_bit(STATUS_POWER_PMI, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_FW_ERROR:\t %d\n",
		test_bit(STATUS_FW_ERROR, &priv->status));
	pos += scnprintf(buf + pos, bufsz - pos, "STATUS_MODE_PENDING:\t %d\n",
		test_bit(STATUS_MODE_PENDING, &priv->status));
	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}

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

	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0;
	int cnt = 0;
	char *buf;
	int bufsz = 24 * 64; /* 24 items * 64 char per item */
	ssize_t ret;

	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}

	pos += scnprintf(buf + pos, bufsz - pos,
			"Interrupt Statistics Report:\n");

	pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
		priv->isr_stats.hw);
	pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
		priv->isr_stats.sw);
	if (priv->isr_stats.sw > 0) {
		pos += scnprintf(buf + pos, bufsz - pos,
			"\tLast Restarting Code:  0x%X\n",
			priv->isr_stats.sw_err);
	}
#ifdef CONFIG_IWLWIFI_DEBUG
	pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
		priv->isr_stats.sch);
	pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
		priv->isr_stats.alive);
#endif
	pos += scnprintf(buf + pos, bufsz - pos,
		"HW RF KILL switch toggled:\t %u\n",
		priv->isr_stats.rfkill);

	pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
		priv->isr_stats.ctkill);

	pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
		priv->isr_stats.wakeup);

	pos += scnprintf(buf + pos, bufsz - pos,
		"Rx command responses:\t\t %u\n",
		priv->isr_stats.rx);
	for (cnt = 0; cnt < REPLY_MAX; cnt++) {
		if (priv->isr_stats.rx_handlers[cnt] > 0)
			pos += scnprintf(buf + pos, bufsz - pos,
				"\tRx handler[%36s]:\t\t %u\n",
				get_cmd_string(cnt),
				priv->isr_stats.rx_handlers[cnt]);
	}

	pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
		priv->isr_stats.tx);

	pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
		priv->isr_stats.unhandled);

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

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

	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", &reset_flag) != 1)
		return -EFAULT;
	if (reset_flag == 0)
		iwl_clear_isr_stats(priv);

	return count;
}

static ssize_t iwl_dbgfs_qos_read(struct file *file, char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0, i;
	char buf[256];
	const size_t bufsz = sizeof(buf);
	ssize_t ret;

	for (i = 0; i < AC_NUM; i++) {
		pos += scnprintf(buf + pos, bufsz - pos,
			"\tcw_min\tcw_max\taifsn\ttxop\n");
		pos += scnprintf(buf + pos, bufsz - pos,
				"AC[%d]\t%u\t%u\t%u\t%u\n", i,
				priv->qos_data.def_qos_parm.ac[i].cw_min,
				priv->qos_data.def_qos_parm.ac[i].cw_max,
				priv->qos_data.def_qos_parm.ac[i].aifsn,
				priv->qos_data.def_qos_parm.ac[i].edca_txop);
	}
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	return ret;
}

#ifdef CONFIG_IWLWIFI_LEDS
static ssize_t iwl_dbgfs_led_read(struct file *file, char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0;
	char buf[256];
	const size_t bufsz = sizeof(buf);
	ssize_t ret;

	pos += scnprintf(buf + pos, bufsz - pos,
			 "allow blinking: %s\n",
			 (priv->allow_blinking) ? "True" : "False");
	if (priv->allow_blinking) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "Led blinking rate: %u\n",
				 priv->last_blink_rate);
		pos += scnprintf(buf + pos, bufsz - pos,
				 "Last blink time: %lu\n",
				 priv->last_blink_time);
	}

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

static ssize_t iwl_dbgfs_thermal_throttling_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_tt_mgmt *tt = &priv->power_data.tt;
	struct iwl_tt_restriction *restriction;
	char buf[100];
	int pos = 0;
	const size_t bufsz = sizeof(buf);
	ssize_t ret;

	pos += scnprintf(buf + pos, bufsz - pos,
			"Thermal Throttling Mode: %s\n",
			(priv->power_data.adv_tt)
			? "Advance" : "Legacy");
	pos += scnprintf(buf + pos, bufsz - pos,
			"Thermal Throttling State: %d\n",
			tt->state);
	if (priv->power_data.adv_tt) {
		restriction = tt->restriction + tt->state;
		pos += scnprintf(buf + pos, bufsz - pos,
				"Tx mode: %d\n",
				restriction->tx_stream);
		pos += scnprintf(buf + pos, bufsz - pos,
				"Rx mode: %d\n",
				restriction->rx_stream);
		pos += scnprintf(buf + pos, bufsz - pos,
				"HT mode: %d\n",
				restriction->is_ht);
	}
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	return ret;
}

static ssize_t iwl_dbgfs_disable_ht40_write(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = file->private_data;
	char buf[8];
	int buf_size;
	int ht40;

	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", &ht40) != 1)
		return -EFAULT;
	if (!iwl_is_associated(priv))
		priv->disable_ht40 = ht40 ? true : false;
	else {
		IWL_ERR(priv, "Sta associated with AP - "
			"Change to 40MHz channel support is not allowed\n");
		return -EINVAL;
	}

	return count;
}

static ssize_t iwl_dbgfs_disable_ht40_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[100];
	int pos = 0;
	const size_t bufsz = sizeof(buf);
	ssize_t ret;

	pos += scnprintf(buf + pos, bufsz - pos,
			"11n 40MHz Mode: %s\n",
			priv->disable_ht40 ? "Disabled" : "Enabled");
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	return ret;
}

DEBUGFS_READ_WRITE_FILE_OPS(sram);
DEBUGFS_WRITE_FILE_OPS(log_event);
DEBUGFS_READ_FILE_OPS(nvm);
DEBUGFS_READ_FILE_OPS(stations);
DEBUGFS_READ_FILE_OPS(channels);
DEBUGFS_READ_FILE_OPS(status);
DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
DEBUGFS_READ_FILE_OPS(qos);
#ifdef CONFIG_IWLWIFI_LEDS
DEBUGFS_READ_FILE_OPS(led);
#endif
DEBUGFS_READ_FILE_OPS(thermal_throttling);
DEBUGFS_READ_WRITE_FILE_OPS(disable_ht40);

static ssize_t iwl_dbgfs_traffic_log_read(struct file *file,
					 char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = file->private_data;
	int pos = 0, ofs = 0;
	int cnt = 0, entry;
	struct iwl_tx_queue *txq;
	struct iwl_queue *q;
	struct iwl_rx_queue *rxq = &priv->rxq;
	char *buf;
	int bufsz = ((IWL_TRAFFIC_ENTRIES * IWL_TRAFFIC_ENTRY_SIZE * 64) * 2) +
		(IWL_MAX_NUM_QUEUES * 32 * 8) + 400;
	const u8 *ptr;
	ssize_t ret;

	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate buffer\n");
		return -ENOMEM;
	}
	pos += scnprintf(buf + pos, bufsz - pos, "Tx Queue\n");
	for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
		txq = &priv->txq[cnt];
		q = &txq->q;
		pos += scnprintf(buf + pos, bufsz - pos,
				"q[%d]: read_ptr: %u, write_ptr: %u\n",
				cnt, q->read_ptr, q->write_ptr);
	}
	if (priv->tx_traffic && (iwl_debug_level & IWL_DL_TX)) {
		ptr = priv->tx_traffic;
		pos += scnprintf(buf + pos, bufsz - pos,
				"Tx Traffic idx: %u\n",	priv->tx_traffic_idx);
		for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) {
			for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16;
			     entry++,  ofs += 16) {
				pos += scnprintf(buf + pos, bufsz - pos,
						"0x%.4x ", ofs);
				hex_dump_to_buffer(ptr + ofs, 16, 16, 2,
						   buf + pos, bufsz - pos, 0);
				pos += strlen(buf);
				if (bufsz - pos > 0)
					buf[pos++] = '\n';
			}
		}
	}

	pos += scnprintf(buf + pos, bufsz - pos, "Rx Queue\n");
	pos += scnprintf(buf + pos, bufsz - pos,
			"read: %u, write: %u\n",
			 rxq->read, rxq->write);

	if (priv->rx_traffic && (iwl_debug_level & IWL_DL_RX)) {
		ptr = priv->rx_traffic;
		pos += scnprintf(buf + pos, bufsz - pos,
				"Rx Traffic idx: %u\n",	priv->rx_traffic_idx);
		for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) {
			for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16;
			     entry++,  ofs += 16) {
				pos += scnprintf(buf + pos, bufsz - pos,
						"0x%.4x ", ofs);
				hex_dump_to_buffer(ptr + ofs, 16, 16, 2,
						   buf + pos, bufsz - pos, 0);
				pos += strlen(buf);
				if (bufsz - 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_traffic_log_write(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = file->private_data;
	char buf[8];
	int buf_size;
	int traffic_log;

	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", &traffic_log) != 1)
		return -EFAULT;
	if (traffic_log == 0)
		iwl_reset_traffic_log(priv);

	return count;
}

static ssize_t iwl_dbgfs_tx_queue_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_tx_queue *txq;
	struct iwl_queue *q;
	char *buf;
	int pos = 0;
	int cnt;
	int ret;
	const size_t bufsz = sizeof(char) * 60 * IWL_MAX_NUM_QUEUES;

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

	for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
		txq = &priv->txq[cnt];
		q = &txq->q;
		pos += scnprintf(buf + pos, bufsz - pos,
				"hwq %.2d: read=%u write=%u stop=%d"
				" swq_id=%#.2x (ac %d/hwq %d)\n",
				cnt, q->read_ptr, q->write_ptr,
				!!test_bit(cnt, priv->queue_stopped),
				txq->swq_id,
				txq->swq_id & 0x80 ? txq->swq_id & 3 :
				txq->swq_id,
				txq->swq_id & 0x80 ? (txq->swq_id >> 2) &
				0x1f : txq->swq_id);
		if (cnt >= 4)
			continue;
		/* for the ACs, display the stop count too */
		pos += scnprintf(buf + pos, bufsz - pos,
				"        stop-count: %d\n",
				atomic_read(&priv->queue_stop_count[cnt]));
	}
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
}

static ssize_t iwl_dbgfs_rx_queue_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_rx_queue *rxq = &priv->rxq;
	char buf[256];
	int pos = 0;
	const size_t bufsz = sizeof(buf);

	pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
						rxq->read);
	pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
						rxq->write);
	pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
						rxq->free_count);
	pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
			 le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF);
	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}

#define UCODE_STATISTICS_CLEAR_MSK		(0x1 << 0)
#define UCODE_STATISTICS_FREQUENCY_MSK		(0x1 << 1)
#define UCODE_STATISTICS_NARROW_BAND_MSK	(0x1 << 2)

static int iwl_dbgfs_statistics_flag(struct iwl_priv *priv, char *buf,
				     int bufsz)
{
	int p = 0;

	p += scnprintf(buf + p, bufsz - p,
		"Statistics Flag(0x%X):\n",
		le32_to_cpu(priv->statistics.flag));
	if (le32_to_cpu(priv->statistics.flag) & UCODE_STATISTICS_CLEAR_MSK)
		p += scnprintf(buf + p, bufsz - p,
		"\tStatistics have been cleared\n");
	p += scnprintf(buf + p, bufsz - p,
		"\tOperational Frequency: %s\n",
		(le32_to_cpu(priv->statistics.flag) &
		UCODE_STATISTICS_FREQUENCY_MSK)
		 ? "2.4 GHz" : "5.2 GHz");
	p += scnprintf(buf + p, bufsz - p,
		"\tTGj Narrow Band: %s\n",
		(le32_to_cpu(priv->statistics.flag) &
		UCODE_STATISTICS_NARROW_BAND_MSK)
		 ? "enabled" : "disabled");
	return p;
}


static ssize_t iwl_dbgfs_ucode_rx_stats_read(struct file *file,
					char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0;
	char *buf;
	int bufsz = sizeof(struct statistics_rx_phy) * 20 +
		sizeof(struct statistics_rx_non_phy) * 20 +
		sizeof(struct statistics_rx_ht_phy) * 20 + 400;
	ssize_t ret;
	struct statistics_rx_phy *ofdm;
	struct statistics_rx_phy *cck;
	struct statistics_rx_non_phy *general;
	struct statistics_rx_ht_phy *ht;

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	/* make request to uCode to retrieve statistics information */
	mutex_lock(&priv->mutex);
	ret = iwl_send_statistics_request(priv, 0);
	mutex_unlock(&priv->mutex);

	if (ret) {
		IWL_ERR(priv,
			"Error sending statistics request: %zd\n", ret);
		return -EAGAIN;
	}
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}

	/* the statistic information display here is based on
	 * the last statistics notification from uCode
	 * might not reflect the current uCode activity
	 */
	ofdm = &priv->statistics.rx.ofdm;
	cck = &priv->statistics.rx.cck;
	general = &priv->statistics.rx.general;
	ht = &priv->statistics.rx.ofdm_ht;
	pos += iwl_dbgfs_statistics_flag(priv, buf, bufsz);
	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_Rx - OFDM:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "ina_cnt: %u\n",
			 le32_to_cpu(ofdm->ina_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_cnt: %u\n",
			 le32_to_cpu(ofdm->fina_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "plcp_err: %u\n",
			 le32_to_cpu(ofdm->plcp_err));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_err: %u\n",
			 le32_to_cpu(ofdm->crc32_err));
	pos += scnprintf(buf + pos, bufsz - pos, "overrun_err: %u\n",
			 le32_to_cpu(ofdm->overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "early_overrun_err: %u\n",
			 le32_to_cpu(ofdm->early_overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_good: %u\n",
			 le32_to_cpu(ofdm->crc32_good));
	pos += scnprintf(buf + pos, bufsz - pos, "false_alarm_cnt: %u\n",
			 le32_to_cpu(ofdm->false_alarm_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_sync_err_cnt: %u\n",
			 le32_to_cpu(ofdm->fina_sync_err_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sfd_timeout: %u\n",
			 le32_to_cpu(ofdm->sfd_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_timeout: %u\n",
			 le32_to_cpu(ofdm->fina_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "unresponded_rts: %u\n",
			 le32_to_cpu(ofdm->unresponded_rts));
	pos += scnprintf(buf + pos, bufsz - pos,
			"rxe_frame_limit_overrun: %u\n",
			le32_to_cpu(ofdm->rxe_frame_limit_overrun));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_ack_cnt: %u\n",
			 le32_to_cpu(ofdm->sent_ack_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_cts_cnt: %u\n",
			 le32_to_cpu(ofdm->sent_cts_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_ba_rsp_cnt: %u\n",
			 le32_to_cpu(ofdm->sent_ba_rsp_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "dsp_self_kill: %u\n",
			 le32_to_cpu(ofdm->dsp_self_kill));
	pos += scnprintf(buf + pos, bufsz - pos, "mh_format_err: %u\n",
			 le32_to_cpu(ofdm->mh_format_err));
	pos += scnprintf(buf + pos, bufsz - pos, "re_acq_main_rssi_sum: %u\n",
			 le32_to_cpu(ofdm->re_acq_main_rssi_sum));

	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_Rx - CCK:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "ina_cnt: %u\n",
			 le32_to_cpu(cck->ina_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_cnt: %u\n",
			 le32_to_cpu(cck->fina_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "plcp_err: %u\n",
			 le32_to_cpu(cck->plcp_err));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_err: %u\n",
			 le32_to_cpu(cck->crc32_err));
	pos += scnprintf(buf + pos, bufsz - pos, "overrun_err: %u\n",
			 le32_to_cpu(cck->overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "early_overrun_err: %u\n",
			 le32_to_cpu(cck->early_overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_good: %u\n",
			 le32_to_cpu(cck->crc32_good));
	pos += scnprintf(buf + pos, bufsz - pos, "false_alarm_cnt: %u\n",
			 le32_to_cpu(cck->false_alarm_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_sync_err_cnt: %u\n",
			 le32_to_cpu(cck->fina_sync_err_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sfd_timeout: %u\n",
			 le32_to_cpu(cck->sfd_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "fina_timeout: %u\n",
			 le32_to_cpu(cck->fina_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "unresponded_rts: %u\n",
			 le32_to_cpu(cck->unresponded_rts));
	pos += scnprintf(buf + pos, bufsz - pos,
			"rxe_frame_limit_overrun: %u\n",
			le32_to_cpu(cck->rxe_frame_limit_overrun));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_ack_cnt: %u\n",
			 le32_to_cpu(cck->sent_ack_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_cts_cnt: %u\n",
			 le32_to_cpu(cck->sent_cts_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "sent_ba_rsp_cnt: %u\n",
			 le32_to_cpu(cck->sent_ba_rsp_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "dsp_self_kill: %u\n",
			 le32_to_cpu(cck->dsp_self_kill));
	pos += scnprintf(buf + pos, bufsz - pos, "mh_format_err: %u\n",
			 le32_to_cpu(cck->mh_format_err));
	pos += scnprintf(buf + pos, bufsz - pos, "re_acq_main_rssi_sum: %u\n",
			 le32_to_cpu(cck->re_acq_main_rssi_sum));

	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_Rx - GENERAL:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "bogus_cts: %u\n",
			 le32_to_cpu(general->bogus_cts));
	pos += scnprintf(buf + pos, bufsz - pos, "bogus_ack: %u\n",
			 le32_to_cpu(general->bogus_ack));
	pos += scnprintf(buf + pos, bufsz - pos, "non_bssid_frames: %u\n",
			 le32_to_cpu(general->non_bssid_frames));
	pos += scnprintf(buf + pos, bufsz - pos, "filtered_frames: %u\n",
			 le32_to_cpu(general->filtered_frames));
	pos += scnprintf(buf + pos, bufsz - pos, "non_channel_beacons: %u\n",
			 le32_to_cpu(general->non_channel_beacons));
	pos += scnprintf(buf + pos, bufsz - pos, "channel_beacons: %u\n",
			 le32_to_cpu(general->channel_beacons));
	pos += scnprintf(buf + pos, bufsz - pos, "num_missed_bcon: %u\n",
			 le32_to_cpu(general->num_missed_bcon));
	pos += scnprintf(buf + pos, bufsz - pos,
			"adc_rx_saturation_time: %u\n",
			le32_to_cpu(general->adc_rx_saturation_time));
	pos += scnprintf(buf + pos, bufsz - pos,
			"ina_detection_search_time: %u\n",
			le32_to_cpu(general->ina_detection_search_time));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_silence_rssi_a: %u\n",
			 le32_to_cpu(general->beacon_silence_rssi_a));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_silence_rssi_b: %u\n",
			 le32_to_cpu(general->beacon_silence_rssi_b));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_silence_rssi_c: %u\n",
			 le32_to_cpu(general->beacon_silence_rssi_c));
	pos += scnprintf(buf + pos, bufsz - pos,
			"interference_data_flag: %u\n",
			le32_to_cpu(general->interference_data_flag));
	pos += scnprintf(buf + pos, bufsz - pos, "channel_load: %u\n",
			 le32_to_cpu(general->channel_load));
	pos += scnprintf(buf + pos, bufsz - pos, "dsp_false_alarms: %u\n",
			 le32_to_cpu(general->dsp_false_alarms));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_rssi_a: %u\n",
			 le32_to_cpu(general->beacon_rssi_a));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_rssi_b: %u\n",
			 le32_to_cpu(general->beacon_rssi_b));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_rssi_c: %u\n",
			 le32_to_cpu(general->beacon_rssi_c));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_energy_a: %u\n",
			 le32_to_cpu(general->beacon_energy_a));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_energy_b: %u\n",
			 le32_to_cpu(general->beacon_energy_b));
	pos += scnprintf(buf + pos, bufsz - pos, "beacon_energy_c: %u\n",
			 le32_to_cpu(general->beacon_energy_c));

	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_Rx - OFDM_HT:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "plcp_err: %u\n",
			 le32_to_cpu(ht->plcp_err));
	pos += scnprintf(buf + pos, bufsz - pos, "overrun_err: %u\n",
			 le32_to_cpu(ht->overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "early_overrun_err: %u\n",
			 le32_to_cpu(ht->early_overrun_err));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_good: %u\n",
			 le32_to_cpu(ht->crc32_good));
	pos += scnprintf(buf + pos, bufsz - pos, "crc32_err: %u\n",
			 le32_to_cpu(ht->crc32_err));
	pos += scnprintf(buf + pos, bufsz - pos, "mh_format_err: %u\n",
			 le32_to_cpu(ht->mh_format_err));
	pos += scnprintf(buf + pos, bufsz - pos, "agg_crc32_good: %u\n",
			 le32_to_cpu(ht->agg_crc32_good));
	pos += scnprintf(buf + pos, bufsz - pos, "agg_mpdu_cnt: %u\n",
			 le32_to_cpu(ht->agg_mpdu_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "agg_cnt: %u\n",
			 le32_to_cpu(ht->agg_cnt));

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

static ssize_t iwl_dbgfs_ucode_tx_stats_read(struct file *file,
					char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0;
	char *buf;
	int bufsz = (sizeof(struct statistics_tx) * 24) + 250;
	ssize_t ret;
	struct statistics_tx *tx;

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	/* make request to uCode to retrieve statistics information */
	mutex_lock(&priv->mutex);
	ret = iwl_send_statistics_request(priv, 0);
	mutex_unlock(&priv->mutex);

	if (ret) {
		IWL_ERR(priv,
			"Error sending statistics request: %zd\n", ret);
		return -EAGAIN;
	}
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}

	/* the statistic information display here is based on
	 * the last statistics notification from uCode
	 * might not reflect the current uCode activity
	 */
	tx = &priv->statistics.tx;
	pos += iwl_dbgfs_statistics_flag(priv, buf, bufsz);
	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_Tx:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "preamble: %u\n",
			 le32_to_cpu(tx->preamble_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "rx_detected_cnt: %u\n",
			 le32_to_cpu(tx->rx_detected_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "bt_prio_defer_cnt: %u\n",
			 le32_to_cpu(tx->bt_prio_defer_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "bt_prio_kill_cnt: %u\n",
			 le32_to_cpu(tx->bt_prio_kill_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "few_bytes_cnt: %u\n",
			 le32_to_cpu(tx->few_bytes_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "cts_timeout: %u\n",
			 le32_to_cpu(tx->cts_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "ack_timeout: %u\n",
			 le32_to_cpu(tx->ack_timeout));
	pos += scnprintf(buf + pos, bufsz - pos, "expected_ack_cnt: %u\n",
			 le32_to_cpu(tx->expected_ack_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "actual_ack_cnt: %u\n",
			 le32_to_cpu(tx->actual_ack_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "dump_msdu_cnt: %u\n",
			 le32_to_cpu(tx->dump_msdu_cnt));
	pos += scnprintf(buf + pos, bufsz - pos,
			"burst_abort_next_frame_mismatch_cnt: %u\n",
			le32_to_cpu(tx->burst_abort_next_frame_mismatch_cnt));
	pos += scnprintf(buf + pos, bufsz - pos,
			"burst_abort_missing_next_frame_cnt: %u\n",
			le32_to_cpu(tx->burst_abort_missing_next_frame_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "cts_timeout_collision: %u\n",
			 le32_to_cpu(tx->cts_timeout_collision));
	pos += scnprintf(buf + pos, bufsz - pos,
			"ack_or_ba_timeout_collision: %u\n",
			le32_to_cpu(tx->ack_or_ba_timeout_collision));
	pos += scnprintf(buf + pos, bufsz - pos, "agg ba_timeout: %u\n",
			 le32_to_cpu(tx->agg.ba_timeout));
	pos += scnprintf(buf + pos, bufsz - pos,
			"agg ba_reschedule_frames: %u\n",
			le32_to_cpu(tx->agg.ba_reschedule_frames));
	pos += scnprintf(buf + pos, bufsz - pos,
			"agg scd_query_agg_frame_cnt: %u\n",
			le32_to_cpu(tx->agg.scd_query_agg_frame_cnt));
	pos += scnprintf(buf + pos, bufsz - pos, "agg scd_query_no_agg: %u\n",
			 le32_to_cpu(tx->agg.scd_query_no_agg));
	pos += scnprintf(buf + pos, bufsz - pos, "agg scd_query_agg: %u\n",
			 le32_to_cpu(tx->agg.scd_query_agg));
	pos += scnprintf(buf + pos, bufsz - pos,
			"agg scd_query_mismatch: %u\n",
			le32_to_cpu(tx->agg.scd_query_mismatch));
	pos += scnprintf(buf + pos, bufsz - pos, "agg frame_not_ready: %u\n",
			 le32_to_cpu(tx->agg.frame_not_ready));
	pos += scnprintf(buf + pos, bufsz - pos, "agg underrun: %u\n",
			 le32_to_cpu(tx->agg.underrun));
	pos += scnprintf(buf + pos, bufsz - pos, "agg bt_prio_kill: %u\n",
			 le32_to_cpu(tx->agg.bt_prio_kill));
	pos += scnprintf(buf + pos, bufsz - pos, "agg rx_ba_rsp_cnt: %u\n",
			 le32_to_cpu(tx->agg.rx_ba_rsp_cnt));

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

static ssize_t iwl_dbgfs_ucode_general_stats_read(struct file *file,
					char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
	int pos = 0;
	char *buf;
	int bufsz = sizeof(struct statistics_general) * 4 + 250;
	ssize_t ret;
	struct statistics_general *general;
	struct statistics_dbg *dbg;
	struct statistics_div *div;

	if (!iwl_is_alive(priv))
		return -EAGAIN;

	/* make request to uCode to retrieve statistics information */
	mutex_lock(&priv->mutex);
	ret = iwl_send_statistics_request(priv, 0);
	mutex_unlock(&priv->mutex);

	if (ret) {
		IWL_ERR(priv,
			"Error sending statistics request: %zd\n", ret);
		return -EAGAIN;
	}
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf) {
		IWL_ERR(priv, "Can not allocate Buffer\n");
		return -ENOMEM;
	}

	/* the statistic information display here is based on
	 * the last statistics notification from uCode
	 * might not reflect the current uCode activity
	 */
	general = &priv->statistics.general;
	dbg = &priv->statistics.general.dbg;
	div = &priv->statistics.general.div;
	pos += iwl_dbgfs_statistics_flag(priv, buf, bufsz);
	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_General:\n");
	pos += scnprintf(buf + pos, bufsz - pos, "temperature: %u\n",
			 le32_to_cpu(general->temperature));
	pos += scnprintf(buf + pos, bufsz - pos, "temperature_m: %u\n",
			 le32_to_cpu(general->temperature_m));
	pos += scnprintf(buf + pos, bufsz - pos, "burst_check: %u\n",
			 le32_to_cpu(dbg->burst_check));
	pos += scnprintf(buf + pos, bufsz - pos, "burst_count: %u\n",
			 le32_to_cpu(dbg->burst_count));
	pos += scnprintf(buf + pos, bufsz - pos, "sleep_time: %u\n",
			 le32_to_cpu(general->sleep_time));
	pos += scnprintf(buf + pos, bufsz - pos, "slots_out: %u\n",
			 le32_to_cpu(general->slots_out));
	pos += scnprintf(buf + pos, bufsz - pos, "slots_idle: %u\n",
			 le32_to_cpu(general->slots_idle));
	pos += scnprintf(buf + pos, bufsz - pos, "ttl_timestamp: %u\n",
			 le32_to_cpu(general->ttl_timestamp));
	pos += scnprintf(buf + pos, bufsz - pos, "tx_on_a: %u\n",
			 le32_to_cpu(div->tx_on_a));
	pos += scnprintf(buf + pos, bufsz - pos, "tx_on_b: %u\n",
			 le32_to_cpu(div->tx_on_b));
	pos += scnprintf(buf + pos, bufsz - pos, "exec_time: %u\n",
			 le32_to_cpu(div->exec_time));
	pos += scnprintf(buf + pos, bufsz - pos, "probe_time: %u\n",
			 le32_to_cpu(div->probe_time));
	pos += scnprintf(buf + pos, bufsz - pos, "rx_enable_counter: %u\n",
			 le32_to_cpu(general->rx_enable_counter));
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	kfree(buf);
	return ret;
}

DEBUGFS_READ_WRITE_FILE_OPS(rx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
DEBUGFS_READ_FILE_OPS(rx_queue);
DEBUGFS_READ_FILE_OPS(tx_queue);
DEBUGFS_READ_FILE_OPS(ucode_rx_stats);
DEBUGFS_READ_FILE_OPS(ucode_tx_stats);
DEBUGFS_READ_FILE_OPS(ucode_general_stats);

/*
 * 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;
	int ret = 0;

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

	DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
	DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
	DEBUGFS_ADD_DIR(debug, dbgfs->dir_drv);
	DEBUGFS_ADD_FILE(nvm, data);
	DEBUGFS_ADD_FILE(sram, data);
	DEBUGFS_ADD_FILE(log_event, data);
	DEBUGFS_ADD_FILE(stations, data);
	DEBUGFS_ADD_FILE(channels, data);
	DEBUGFS_ADD_FILE(status, data);
	DEBUGFS_ADD_FILE(interrupt, data);
	DEBUGFS_ADD_FILE(qos, data);
#ifdef CONFIG_IWLWIFI_LEDS
	DEBUGFS_ADD_FILE(led, data);
#endif
	DEBUGFS_ADD_FILE(thermal_throttling, data);
	DEBUGFS_ADD_FILE(disable_ht40, data);
	DEBUGFS_ADD_FILE(rx_statistics, debug);
	DEBUGFS_ADD_FILE(tx_statistics, debug);
	DEBUGFS_ADD_FILE(traffic_log, debug);
	DEBUGFS_ADD_FILE(rx_queue, debug);
	DEBUGFS_ADD_FILE(tx_queue, debug);
	if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
		DEBUGFS_ADD_FILE(ucode_rx_stats, debug);
		DEBUGFS_ADD_FILE(ucode_tx_stats, debug);
		DEBUGFS_ADD_FILE(ucode_general_stats, debug);
	}
	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
			 &priv->disable_chain_noise_cal);
	if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
	    ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_3945))
		DEBUGFS_ADD_BOOL(disable_tx_power, rf,
				&priv->disable_tx_power_cal);
	return 0;

err:
	IWL_ERR(priv, "Can't open the debugfs directory\n");
	iwl_dbgfs_unregister(priv);
	return ret;
}
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_nvm);
	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->dbgfs_data_files.file_channels);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_status);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_interrupt);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_qos);
#ifdef CONFIG_IWLWIFI_LEDS
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_led);
#endif
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_thermal_throttling);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_disable_ht40);
	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_statistics);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_statistics);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_traffic_log);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_queue);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
	if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
		DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
			file_ucode_rx_stats);
		DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
			file_ucode_tx_stats);
		DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
			file_ucode_general_stats);
	}
	DEBUGFS_REMOVE(priv->dbgfs->dir_debug);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
	if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
	    ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_3945))
		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);