drivers/net/wireless/wl12xx/debugfs.c - nest-cam/v350/linux - Git at Google

 /*
  * This file is part of wl1271
  *
  * Copyright (C) 2009 Nokia Corporation
  *
  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 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 St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  *
  */

 #include "debugfs.h"

 #include <linux/skbuff.h>
 #include <linux/slab.h>

 #include "wl12xx.h"
 #include "acx.h"
 #include "ps.h"
 #include "io.h"

 /* ms */
 #define WL1271_DEBUGFS_STATS_LIFETIME 1000

 /* debugfs macros idea from mac80211 */
 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
 static int wl1271_format_buffer(char __user *userbuf, size_t count,
 				    loff_t *ppos, char *fmt, ...)
 {
 	va_list args;
 	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
 	int res;

 	va_start(args, fmt);
 	res = vscnprintf(buf, sizeof(buf), fmt, args);
 	va_end(args);

 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 }

 #define DEBUGFS_READONLY_FILE(name, fmt, value...)			\
 static ssize_t name## _read(struct file *file, char __user *userbuf,	\
 			    size_t count, loff_t *ppos)			\
 {									\
 	struct wl1271 *wl = file->private_data;				\
 	return wl1271_format_buffer(userbuf, count, ppos,		\
 				    fmt "\n", ##value);			\
 }									\
 									\
 static const struct file_operations name## _ops = {			\
 	.read = name## _read,						\
 	.open = wl1271_open_file_generic,				\
 	.llseek	= generic_file_llseek,					\
 };

 #define DEBUGFS_ADD(name, parent)					\
 	entry = debugfs_create_file(#name, 0400, parent,		\
 				    wl, &name## _ops);			\
 	if (!entry || IS_ERR(entry))					\
 		goto err;						\

 #define DEBUGFS_FWSTATS_FILE(sub, name, fmt)				\
 static ssize_t sub## _ ##name## _read(struct file *file,		\
 				      char __user *userbuf,		\
 				      size_t count, loff_t *ppos)	\
 {									\
 	struct wl1271 *wl = file->private_data;				\
 									\
 	wl1271_debugfs_update_stats(wl);				\
 									\
 	return wl1271_format_buffer(userbuf, count, ppos, fmt "\n",	\
 				    wl->stats.fw_stats->sub.name);	\
 }									\
 									\
 static const struct file_operations sub## _ ##name## _ops = {		\
 	.read = sub## _ ##name## _read,					\
 	.open = wl1271_open_file_generic,				\
 	.llseek	= generic_file_llseek,					\
 };

 #define DEBUGFS_FWSTATS_ADD(sub, name)				\
 	DEBUGFS_ADD(sub## _ ##name, stats)

 static void wl1271_debugfs_update_stats(struct wl1271 *wl)
 {
 	int ret;

 	mutex_lock(&wl->mutex);

 	ret = wl1271_ps_elp_wakeup(wl, false);
 	if (ret < 0)
 		goto out;

 	if (wl->state == WL1271_STATE_ON &&
 	    time_after(jiffies, wl->stats.fw_stats_update +
 		       msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
 		wl1271_acx_statistics(wl, wl->stats.fw_stats);
 		wl->stats.fw_stats_update = jiffies;
 	}

 	wl1271_ps_elp_sleep(wl);

 out:
 	mutex_unlock(&wl->mutex);
 }

 static int wl1271_open_file_generic(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
 	return 0;
 }

 DEBUGFS_FWSTATS_FILE(tx, internal_desc_overflow, "%u");

 DEBUGFS_FWSTATS_FILE(rx, out_of_mem, "%u");
 DEBUGFS_FWSTATS_FILE(rx, hdr_overflow, "%u");
 DEBUGFS_FWSTATS_FILE(rx, hw_stuck, "%u");
 DEBUGFS_FWSTATS_FILE(rx, dropped, "%u");
 DEBUGFS_FWSTATS_FILE(rx, fcs_err, "%u");
 DEBUGFS_FWSTATS_FILE(rx, xfr_hint_trig, "%u");
 DEBUGFS_FWSTATS_FILE(rx, path_reset, "%u");
 DEBUGFS_FWSTATS_FILE(rx, reset_counter, "%u");

 DEBUGFS_FWSTATS_FILE(dma, rx_requested, "%u");
 DEBUGFS_FWSTATS_FILE(dma, rx_errors, "%u");
 DEBUGFS_FWSTATS_FILE(dma, tx_requested, "%u");
 DEBUGFS_FWSTATS_FILE(dma, tx_errors, "%u");

 DEBUGFS_FWSTATS_FILE(isr, cmd_cmplt, "%u");
 DEBUGFS_FWSTATS_FILE(isr, fiqs, "%u");
 DEBUGFS_FWSTATS_FILE(isr, rx_headers, "%u");
 DEBUGFS_FWSTATS_FILE(isr, rx_mem_overflow, "%u");
 DEBUGFS_FWSTATS_FILE(isr, rx_rdys, "%u");
 DEBUGFS_FWSTATS_FILE(isr, irqs, "%u");
 DEBUGFS_FWSTATS_FILE(isr, tx_procs, "%u");
 DEBUGFS_FWSTATS_FILE(isr, decrypt_done, "%u");
 DEBUGFS_FWSTATS_FILE(isr, dma0_done, "%u");
 DEBUGFS_FWSTATS_FILE(isr, dma1_done, "%u");
 DEBUGFS_FWSTATS_FILE(isr, tx_exch_complete, "%u");
 DEBUGFS_FWSTATS_FILE(isr, commands, "%u");
 DEBUGFS_FWSTATS_FILE(isr, rx_procs, "%u");
 DEBUGFS_FWSTATS_FILE(isr, hw_pm_mode_changes, "%u");
 DEBUGFS_FWSTATS_FILE(isr, host_acknowledges, "%u");
 DEBUGFS_FWSTATS_FILE(isr, pci_pm, "%u");
 DEBUGFS_FWSTATS_FILE(isr, wakeups, "%u");
 DEBUGFS_FWSTATS_FILE(isr, low_rssi, "%u");

 DEBUGFS_FWSTATS_FILE(wep, addr_key_count, "%u");
 DEBUGFS_FWSTATS_FILE(wep, default_key_count, "%u");
 /* skipping wep.reserved */
 DEBUGFS_FWSTATS_FILE(wep, key_not_found, "%u");
 DEBUGFS_FWSTATS_FILE(wep, decrypt_fail, "%u");
 DEBUGFS_FWSTATS_FILE(wep, packets, "%u");
 DEBUGFS_FWSTATS_FILE(wep, interrupt, "%u");

 DEBUGFS_FWSTATS_FILE(pwr, ps_enter, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, elp_enter, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, missing_bcns, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, wake_on_host, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, wake_on_timer_exp, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, tx_with_ps, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, tx_without_ps, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, rcvd_beacons, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, power_save_off, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, enable_ps, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, disable_ps, "%u");
 DEBUGFS_FWSTATS_FILE(pwr, fix_tsf_ps, "%u");
 /* skipping cont_miss_bcns_spread for now */
 DEBUGFS_FWSTATS_FILE(pwr, rcvd_awake_beacons, "%u");

 DEBUGFS_FWSTATS_FILE(mic, rx_pkts, "%u");
 DEBUGFS_FWSTATS_FILE(mic, calc_failure, "%u");

 DEBUGFS_FWSTATS_FILE(aes, encrypt_fail, "%u");
 DEBUGFS_FWSTATS_FILE(aes, decrypt_fail, "%u");
 DEBUGFS_FWSTATS_FILE(aes, encrypt_packets, "%u");
 DEBUGFS_FWSTATS_FILE(aes, decrypt_packets, "%u");
 DEBUGFS_FWSTATS_FILE(aes, encrypt_interrupt, "%u");
 DEBUGFS_FWSTATS_FILE(aes, decrypt_interrupt, "%u");

 DEBUGFS_FWSTATS_FILE(event, heart_beat, "%u");
 DEBUGFS_FWSTATS_FILE(event, calibration, "%u");
 DEBUGFS_FWSTATS_FILE(event, rx_mismatch, "%u");
 DEBUGFS_FWSTATS_FILE(event, rx_mem_empty, "%u");
 DEBUGFS_FWSTATS_FILE(event, rx_pool, "%u");
 DEBUGFS_FWSTATS_FILE(event, oom_late, "%u");
 DEBUGFS_FWSTATS_FILE(event, phy_transmit_error, "%u");
 DEBUGFS_FWSTATS_FILE(event, tx_stuck, "%u");

 DEBUGFS_FWSTATS_FILE(ps, pspoll_timeouts, "%u");
 DEBUGFS_FWSTATS_FILE(ps, upsd_timeouts, "%u");
 DEBUGFS_FWSTATS_FILE(ps, upsd_max_sptime, "%u");
 DEBUGFS_FWSTATS_FILE(ps, upsd_max_apturn, "%u");
 DEBUGFS_FWSTATS_FILE(ps, pspoll_max_apturn, "%u");
 DEBUGFS_FWSTATS_FILE(ps, pspoll_utilization, "%u");
 DEBUGFS_FWSTATS_FILE(ps, upsd_utilization, "%u");

 DEBUGFS_FWSTATS_FILE(rxpipe, rx_prep_beacon_drop, "%u");
 DEBUGFS_FWSTATS_FILE(rxpipe, descr_host_int_trig_rx_data, "%u");
 DEBUGFS_FWSTATS_FILE(rxpipe, beacon_buffer_thres_host_int_trig_rx_data, "%u");
 DEBUGFS_FWSTATS_FILE(rxpipe, missed_beacon_host_int_trig_rx_data, "%u");
 DEBUGFS_FWSTATS_FILE(rxpipe, tx_xfr_host_int_trig_rx_data, "%u");

 DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
 DEBUGFS_READONLY_FILE(excessive_retries, "%u",
 		      wl->stats.excessive_retries);

 static ssize_t tx_queue_len_read(struct file *file, char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
 	u32 queue_len;
 	char buf[20];
 	int res;

 	queue_len = wl->tx_queue_count;

 	res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 }

 static const struct file_operations tx_queue_len_ops = {
 	.read = tx_queue_len_read,
 	.open = wl1271_open_file_generic,
 	.llseek = default_llseek,
 };

 static ssize_t gpio_power_read(struct file *file, char __user *user_buf,
 			  size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
 	bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);

 	int res;
 	char buf[10];

 	res = scnprintf(buf, sizeof(buf), "%d\n", state);

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

 static ssize_t gpio_power_write(struct file *file,
 			   const char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
 	char buf[10];
 	size_t len;
 	unsigned long value;
 	int ret;

 	mutex_lock(&wl->mutex);

 	len = min(count, sizeof(buf) - 1);
 	if (copy_from_user(buf, user_buf, len)) {
 		ret = -EFAULT;
 		goto out;
 	}
 	buf[len] = '\0';

 	ret = strict_strtoul(buf, 0, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value in gpio_power");
 		goto out;
 	}

 	if (value)
 		wl1271_power_on(wl);
 	else
 		wl1271_power_off(wl);

 out:
 	mutex_unlock(&wl->mutex);
 	return count;
 }

 static const struct file_operations gpio_power_ops = {
 	.read = gpio_power_read,
 	.write = gpio_power_write,
 	.open = wl1271_open_file_generic,
 	.llseek = default_llseek,
 };

 static int wl1271_debugfs_add_files(struct wl1271 *wl)
 {
 	int ret = 0;
 	struct dentry *entry, *stats;

 	stats = debugfs_create_dir("fw-statistics", wl->rootdir);
 	if (!stats || IS_ERR(stats)) {
 		entry = stats;
 		goto err;
 	}

 	DEBUGFS_FWSTATS_ADD(tx, internal_desc_overflow);

 	DEBUGFS_FWSTATS_ADD(rx, out_of_mem);
 	DEBUGFS_FWSTATS_ADD(rx, hdr_overflow);
 	DEBUGFS_FWSTATS_ADD(rx, hw_stuck);
 	DEBUGFS_FWSTATS_ADD(rx, dropped);
 	DEBUGFS_FWSTATS_ADD(rx, fcs_err);
 	DEBUGFS_FWSTATS_ADD(rx, xfr_hint_trig);
 	DEBUGFS_FWSTATS_ADD(rx, path_reset);
 	DEBUGFS_FWSTATS_ADD(rx, reset_counter);

 	DEBUGFS_FWSTATS_ADD(dma, rx_requested);
 	DEBUGFS_FWSTATS_ADD(dma, rx_errors);
 	DEBUGFS_FWSTATS_ADD(dma, tx_requested);
 	DEBUGFS_FWSTATS_ADD(dma, tx_errors);

 	DEBUGFS_FWSTATS_ADD(isr, cmd_cmplt);
 	DEBUGFS_FWSTATS_ADD(isr, fiqs);
 	DEBUGFS_FWSTATS_ADD(isr, rx_headers);
 	DEBUGFS_FWSTATS_ADD(isr, rx_mem_overflow);
 	DEBUGFS_FWSTATS_ADD(isr, rx_rdys);
 	DEBUGFS_FWSTATS_ADD(isr, irqs);
 	DEBUGFS_FWSTATS_ADD(isr, tx_procs);
 	DEBUGFS_FWSTATS_ADD(isr, decrypt_done);
 	DEBUGFS_FWSTATS_ADD(isr, dma0_done);
 	DEBUGFS_FWSTATS_ADD(isr, dma1_done);
 	DEBUGFS_FWSTATS_ADD(isr, tx_exch_complete);
 	DEBUGFS_FWSTATS_ADD(isr, commands);
 	DEBUGFS_FWSTATS_ADD(isr, rx_procs);
 	DEBUGFS_FWSTATS_ADD(isr, hw_pm_mode_changes);
 	DEBUGFS_FWSTATS_ADD(isr, host_acknowledges);
 	DEBUGFS_FWSTATS_ADD(isr, pci_pm);
 	DEBUGFS_FWSTATS_ADD(isr, wakeups);
 	DEBUGFS_FWSTATS_ADD(isr, low_rssi);

 	DEBUGFS_FWSTATS_ADD(wep, addr_key_count);
 	DEBUGFS_FWSTATS_ADD(wep, default_key_count);
 	/* skipping wep.reserved */
 	DEBUGFS_FWSTATS_ADD(wep, key_not_found);
 	DEBUGFS_FWSTATS_ADD(wep, decrypt_fail);
 	DEBUGFS_FWSTATS_ADD(wep, packets);
 	DEBUGFS_FWSTATS_ADD(wep, interrupt);

 	DEBUGFS_FWSTATS_ADD(pwr, ps_enter);
 	DEBUGFS_FWSTATS_ADD(pwr, elp_enter);
 	DEBUGFS_FWSTATS_ADD(pwr, missing_bcns);
 	DEBUGFS_FWSTATS_ADD(pwr, wake_on_host);
 	DEBUGFS_FWSTATS_ADD(pwr, wake_on_timer_exp);
 	DEBUGFS_FWSTATS_ADD(pwr, tx_with_ps);
 	DEBUGFS_FWSTATS_ADD(pwr, tx_without_ps);
 	DEBUGFS_FWSTATS_ADD(pwr, rcvd_beacons);
 	DEBUGFS_FWSTATS_ADD(pwr, power_save_off);
 	DEBUGFS_FWSTATS_ADD(pwr, enable_ps);
 	DEBUGFS_FWSTATS_ADD(pwr, disable_ps);
 	DEBUGFS_FWSTATS_ADD(pwr, fix_tsf_ps);
 	/* skipping cont_miss_bcns_spread for now */
 	DEBUGFS_FWSTATS_ADD(pwr, rcvd_awake_beacons);

 	DEBUGFS_FWSTATS_ADD(mic, rx_pkts);
 	DEBUGFS_FWSTATS_ADD(mic, calc_failure);

 	DEBUGFS_FWSTATS_ADD(aes, encrypt_fail);
 	DEBUGFS_FWSTATS_ADD(aes, decrypt_fail);
 	DEBUGFS_FWSTATS_ADD(aes, encrypt_packets);
 	DEBUGFS_FWSTATS_ADD(aes, decrypt_packets);
 	DEBUGFS_FWSTATS_ADD(aes, encrypt_interrupt);
 	DEBUGFS_FWSTATS_ADD(aes, decrypt_interrupt);

 	DEBUGFS_FWSTATS_ADD(event, heart_beat);
 	DEBUGFS_FWSTATS_ADD(event, calibration);
 	DEBUGFS_FWSTATS_ADD(event, rx_mismatch);
 	DEBUGFS_FWSTATS_ADD(event, rx_mem_empty);
 	DEBUGFS_FWSTATS_ADD(event, rx_pool);
 	DEBUGFS_FWSTATS_ADD(event, oom_late);
 	DEBUGFS_FWSTATS_ADD(event, phy_transmit_error);
 	DEBUGFS_FWSTATS_ADD(event, tx_stuck);

 	DEBUGFS_FWSTATS_ADD(ps, pspoll_timeouts);
 	DEBUGFS_FWSTATS_ADD(ps, upsd_timeouts);
 	DEBUGFS_FWSTATS_ADD(ps, upsd_max_sptime);
 	DEBUGFS_FWSTATS_ADD(ps, upsd_max_apturn);
 	DEBUGFS_FWSTATS_ADD(ps, pspoll_max_apturn);
 	DEBUGFS_FWSTATS_ADD(ps, pspoll_utilization);
 	DEBUGFS_FWSTATS_ADD(ps, upsd_utilization);

 	DEBUGFS_FWSTATS_ADD(rxpipe, rx_prep_beacon_drop);
 	DEBUGFS_FWSTATS_ADD(rxpipe, descr_host_int_trig_rx_data);
 	DEBUGFS_FWSTATS_ADD(rxpipe, beacon_buffer_thres_host_int_trig_rx_data);
 	DEBUGFS_FWSTATS_ADD(rxpipe, missed_beacon_host_int_trig_rx_data);
 	DEBUGFS_FWSTATS_ADD(rxpipe, tx_xfr_host_int_trig_rx_data);

 	DEBUGFS_ADD(tx_queue_len, wl->rootdir);
 	DEBUGFS_ADD(retry_count, wl->rootdir);
 	DEBUGFS_ADD(excessive_retries, wl->rootdir);

 	DEBUGFS_ADD(gpio_power, wl->rootdir);

 	entry = debugfs_create_x32("debug_level", 0600, wl->rootdir,
 				   &wl12xx_debug_level);
 	if (!entry || IS_ERR(entry))
 		goto err;

 	return 0;

 err:
 	if (IS_ERR(entry))
 		ret = PTR_ERR(entry);
 	else
 		ret = -ENOMEM;

 	return ret;
 }

 void wl1271_debugfs_reset(struct wl1271 *wl)
 {
 	if (!wl->rootdir)
 		return;

 	memset(wl->stats.fw_stats, 0, sizeof(*wl->stats.fw_stats));
 	wl->stats.retry_count = 0;
 	wl->stats.excessive_retries = 0;
 }

 int wl1271_debugfs_init(struct wl1271 *wl)
 {
 	int ret;

 	wl->rootdir = debugfs_create_dir(KBUILD_MODNAME,
 					 wl->hw->wiphy->debugfsdir);

 	if (IS_ERR(wl->rootdir)) {
 		ret = PTR_ERR(wl->rootdir);
 		wl->rootdir = NULL;
 		goto err;
 	}

 	wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats),
 				      GFP_KERNEL);

 	if (!wl->stats.fw_stats) {
 		ret = -ENOMEM;
 		goto err_fw;
 	}

 	wl->stats.fw_stats_update = jiffies;

 	ret = wl1271_debugfs_add_files(wl);

 	if (ret < 0)
 		goto err_file;

 	return 0;

 err_file:
 	kfree(wl->stats.fw_stats);
 	wl->stats.fw_stats = NULL;

 err_fw:
 	debugfs_remove_recursive(wl->rootdir);
 	wl->rootdir = NULL;

 err:
 	return ret;
 }

 void wl1271_debugfs_exit(struct wl1271 *wl)
 {
 	kfree(wl->stats.fw_stats);
 	wl->stats.fw_stats = NULL;

 	debugfs_remove_recursive(wl->rootdir);
 	wl->rootdir = NULL;

 }
	/*
	* This file is part of wl1271
	*
	* Copyright (C) 2009 Nokia Corporation
	*
	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* version 2 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 St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*
	*/

	#include "debugfs.h"

	#include <linux/skbuff.h>
	#include <linux/slab.h>

	#include "wl12xx.h"
	#include "acx.h"
	#include "ps.h"
	#include "io.h"

	/* ms */
	#define WL1271_DEBUGFS_STATS_LIFETIME 1000

	/* debugfs macros idea from mac80211 */
	#define DEBUGFS_FORMAT_BUFFER_SIZE 100
	static int wl1271_format_buffer(char __user *userbuf, size_t count,
	loff_t ppos, char fmt, ...)
	{
	va_list args;
	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
	int res;

	va_start(args, fmt);
	res = vscnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	}

	#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
	static ssize_t name## _read(struct file file, char __user userbuf, \
	size_t count, loff_t *ppos) \
	{ \
	struct wl1271 *wl = file->private_data; \
	return wl1271_format_buffer(userbuf, count, ppos, \
	fmt "\n", ##value); \
	} \
	\
	static const struct file_operations name## _ops = { \
	.read = name## _read, \
	.open = wl1271_open_file_generic, \
	.llseek = generic_file_llseek, \
	};

	#define DEBUGFS_ADD(name, parent) \
	entry = debugfs_create_file(#name, 0400, parent, \
	wl, &name## _ops); \
	if (!entry \|\| IS_ERR(entry)) \
	goto err; \

	#define DEBUGFS_FWSTATS_FILE(sub, name, fmt) \
	static ssize_t sub## _ ##name## _read(struct file *file, \
	char __user *userbuf, \
	size_t count, loff_t *ppos) \
	{ \
	struct wl1271 *wl = file->private_data; \
	\
	wl1271_debugfs_update_stats(wl); \
	\
	return wl1271_format_buffer(userbuf, count, ppos, fmt "\n", \
	wl->stats.fw_stats->sub.name); \
	} \
	\
	static const struct file_operations sub## _ ##name## _ops = { \
	.read = sub## _ ##name## _read, \
	.open = wl1271_open_file_generic, \
	.llseek = generic_file_llseek, \
	};

	#define DEBUGFS_FWSTATS_ADD(sub, name) \
	DEBUGFS_ADD(sub## _ ##name, stats)

	static void wl1271_debugfs_update_stats(struct wl1271 *wl)
	{
	int ret;

	mutex_lock(&wl->mutex);

	ret = wl1271_ps_elp_wakeup(wl, false);
	if (ret < 0)
	goto out;

	if (wl->state == WL1271_STATE_ON &&
	time_after(jiffies, wl->stats.fw_stats_update +
	msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
	wl1271_acx_statistics(wl, wl->stats.fw_stats);
	wl->stats.fw_stats_update = jiffies;
	}

	wl1271_ps_elp_sleep(wl);

	out:
	mutex_unlock(&wl->mutex);
	}

	static int wl1271_open_file_generic(struct inode inode, struct file file)
	{
	file->private_data = inode->i_private;
	return 0;
	}

	DEBUGFS_FWSTATS_FILE(tx, internal_desc_overflow, "%u");

	DEBUGFS_FWSTATS_FILE(rx, out_of_mem, "%u");
	DEBUGFS_FWSTATS_FILE(rx, hdr_overflow, "%u");
	DEBUGFS_FWSTATS_FILE(rx, hw_stuck, "%u");
	DEBUGFS_FWSTATS_FILE(rx, dropped, "%u");
	DEBUGFS_FWSTATS_FILE(rx, fcs_err, "%u");
	DEBUGFS_FWSTATS_FILE(rx, xfr_hint_trig, "%u");
	DEBUGFS_FWSTATS_FILE(rx, path_reset, "%u");
	DEBUGFS_FWSTATS_FILE(rx, reset_counter, "%u");

	DEBUGFS_FWSTATS_FILE(dma, rx_requested, "%u");
	DEBUGFS_FWSTATS_FILE(dma, rx_errors, "%u");
	DEBUGFS_FWSTATS_FILE(dma, tx_requested, "%u");
	DEBUGFS_FWSTATS_FILE(dma, tx_errors, "%u");

	DEBUGFS_FWSTATS_FILE(isr, cmd_cmplt, "%u");
	DEBUGFS_FWSTATS_FILE(isr, fiqs, "%u");
	DEBUGFS_FWSTATS_FILE(isr, rx_headers, "%u");
	DEBUGFS_FWSTATS_FILE(isr, rx_mem_overflow, "%u");
	DEBUGFS_FWSTATS_FILE(isr, rx_rdys, "%u");
	DEBUGFS_FWSTATS_FILE(isr, irqs, "%u");
	DEBUGFS_FWSTATS_FILE(isr, tx_procs, "%u");
	DEBUGFS_FWSTATS_FILE(isr, decrypt_done, "%u");
	DEBUGFS_FWSTATS_FILE(isr, dma0_done, "%u");
	DEBUGFS_FWSTATS_FILE(isr, dma1_done, "%u");
	DEBUGFS_FWSTATS_FILE(isr, tx_exch_complete, "%u");
	DEBUGFS_FWSTATS_FILE(isr, commands, "%u");
	DEBUGFS_FWSTATS_FILE(isr, rx_procs, "%u");
	DEBUGFS_FWSTATS_FILE(isr, hw_pm_mode_changes, "%u");
	DEBUGFS_FWSTATS_FILE(isr, host_acknowledges, "%u");
	DEBUGFS_FWSTATS_FILE(isr, pci_pm, "%u");
	DEBUGFS_FWSTATS_FILE(isr, wakeups, "%u");
	DEBUGFS_FWSTATS_FILE(isr, low_rssi, "%u");

	DEBUGFS_FWSTATS_FILE(wep, addr_key_count, "%u");
	DEBUGFS_FWSTATS_FILE(wep, default_key_count, "%u");
	/* skipping wep.reserved */
	DEBUGFS_FWSTATS_FILE(wep, key_not_found, "%u");
	DEBUGFS_FWSTATS_FILE(wep, decrypt_fail, "%u");
	DEBUGFS_FWSTATS_FILE(wep, packets, "%u");
	DEBUGFS_FWSTATS_FILE(wep, interrupt, "%u");

	DEBUGFS_FWSTATS_FILE(pwr, ps_enter, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, elp_enter, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, missing_bcns, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, wake_on_host, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, wake_on_timer_exp, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, tx_with_ps, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, tx_without_ps, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, rcvd_beacons, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, power_save_off, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, enable_ps, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, disable_ps, "%u");
	DEBUGFS_FWSTATS_FILE(pwr, fix_tsf_ps, "%u");
	/* skipping cont_miss_bcns_spread for now */
	DEBUGFS_FWSTATS_FILE(pwr, rcvd_awake_beacons, "%u");

	DEBUGFS_FWSTATS_FILE(mic, rx_pkts, "%u");
	DEBUGFS_FWSTATS_FILE(mic, calc_failure, "%u");

	DEBUGFS_FWSTATS_FILE(aes, encrypt_fail, "%u");
	DEBUGFS_FWSTATS_FILE(aes, decrypt_fail, "%u");
	DEBUGFS_FWSTATS_FILE(aes, encrypt_packets, "%u");
	DEBUGFS_FWSTATS_FILE(aes, decrypt_packets, "%u");
	DEBUGFS_FWSTATS_FILE(aes, encrypt_interrupt, "%u");
	DEBUGFS_FWSTATS_FILE(aes, decrypt_interrupt, "%u");

	DEBUGFS_FWSTATS_FILE(event, heart_beat, "%u");
	DEBUGFS_FWSTATS_FILE(event, calibration, "%u");
	DEBUGFS_FWSTATS_FILE(event, rx_mismatch, "%u");
	DEBUGFS_FWSTATS_FILE(event, rx_mem_empty, "%u");
	DEBUGFS_FWSTATS_FILE(event, rx_pool, "%u");
	DEBUGFS_FWSTATS_FILE(event, oom_late, "%u");
	DEBUGFS_FWSTATS_FILE(event, phy_transmit_error, "%u");
	DEBUGFS_FWSTATS_FILE(event, tx_stuck, "%u");

	DEBUGFS_FWSTATS_FILE(ps, pspoll_timeouts, "%u");
	DEBUGFS_FWSTATS_FILE(ps, upsd_timeouts, "%u");
	DEBUGFS_FWSTATS_FILE(ps, upsd_max_sptime, "%u");
	DEBUGFS_FWSTATS_FILE(ps, upsd_max_apturn, "%u");
	DEBUGFS_FWSTATS_FILE(ps, pspoll_max_apturn, "%u");
	DEBUGFS_FWSTATS_FILE(ps, pspoll_utilization, "%u");
	DEBUGFS_FWSTATS_FILE(ps, upsd_utilization, "%u");

	DEBUGFS_FWSTATS_FILE(rxpipe, rx_prep_beacon_drop, "%u");
	DEBUGFS_FWSTATS_FILE(rxpipe, descr_host_int_trig_rx_data, "%u");
	DEBUGFS_FWSTATS_FILE(rxpipe, beacon_buffer_thres_host_int_trig_rx_data, "%u");
	DEBUGFS_FWSTATS_FILE(rxpipe, missed_beacon_host_int_trig_rx_data, "%u");
	DEBUGFS_FWSTATS_FILE(rxpipe, tx_xfr_host_int_trig_rx_data, "%u");

	DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
	DEBUGFS_READONLY_FILE(excessive_retries, "%u",
	wl->stats.excessive_retries);

	static ssize_t tx_queue_len_read(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	struct wl1271 *wl = file->private_data;
	u32 queue_len;
	char buf[20];
	int res;

	queue_len = wl->tx_queue_count;

	res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	}

	static const struct file_operations tx_queue_len_ops = {
	.read = tx_queue_len_read,
	.open = wl1271_open_file_generic,
	.llseek = default_llseek,
	};

	static ssize_t gpio_power_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct wl1271 *wl = file->private_data;
	bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);

	int res;
	char buf[10];

	res = scnprintf(buf, sizeof(buf), "%d\n", state);

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

	static ssize_t gpio_power_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct wl1271 *wl = file->private_data;
	char buf[10];
	size_t len;
	unsigned long value;
	int ret;

	mutex_lock(&wl->mutex);

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len)) {
	ret = -EFAULT;
	goto out;
	}
	buf[len] = '\0';

	ret = strict_strtoul(buf, 0, &value);
	if (ret < 0) {
	wl1271_warning("illegal value in gpio_power");
	goto out;
	}

	if (value)
	wl1271_power_on(wl);
	else
	wl1271_power_off(wl);

	out:
	mutex_unlock(&wl->mutex);
	return count;
	}

	static const struct file_operations gpio_power_ops = {
	.read = gpio_power_read,
	.write = gpio_power_write,
	.open = wl1271_open_file_generic,
	.llseek = default_llseek,
	};

	static int wl1271_debugfs_add_files(struct wl1271 *wl)
	{
	int ret = 0;
	struct dentry entry, stats;

	stats = debugfs_create_dir("fw-statistics", wl->rootdir);
	if (!stats \|\| IS_ERR(stats)) {
	entry = stats;
	goto err;
	}

	DEBUGFS_FWSTATS_ADD(tx, internal_desc_overflow);

	DEBUGFS_FWSTATS_ADD(rx, out_of_mem);
	DEBUGFS_FWSTATS_ADD(rx, hdr_overflow);
	DEBUGFS_FWSTATS_ADD(rx, hw_stuck);
	DEBUGFS_FWSTATS_ADD(rx, dropped);
	DEBUGFS_FWSTATS_ADD(rx, fcs_err);
	DEBUGFS_FWSTATS_ADD(rx, xfr_hint_trig);
	DEBUGFS_FWSTATS_ADD(rx, path_reset);
	DEBUGFS_FWSTATS_ADD(rx, reset_counter);

	DEBUGFS_FWSTATS_ADD(dma, rx_requested);
	DEBUGFS_FWSTATS_ADD(dma, rx_errors);
	DEBUGFS_FWSTATS_ADD(dma, tx_requested);
	DEBUGFS_FWSTATS_ADD(dma, tx_errors);

	DEBUGFS_FWSTATS_ADD(isr, cmd_cmplt);
	DEBUGFS_FWSTATS_ADD(isr, fiqs);
	DEBUGFS_FWSTATS_ADD(isr, rx_headers);
	DEBUGFS_FWSTATS_ADD(isr, rx_mem_overflow);
	DEBUGFS_FWSTATS_ADD(isr, rx_rdys);
	DEBUGFS_FWSTATS_ADD(isr, irqs);
	DEBUGFS_FWSTATS_ADD(isr, tx_procs);
	DEBUGFS_FWSTATS_ADD(isr, decrypt_done);
	DEBUGFS_FWSTATS_ADD(isr, dma0_done);
	DEBUGFS_FWSTATS_ADD(isr, dma1_done);
	DEBUGFS_FWSTATS_ADD(isr, tx_exch_complete);
	DEBUGFS_FWSTATS_ADD(isr, commands);
	DEBUGFS_FWSTATS_ADD(isr, rx_procs);
	DEBUGFS_FWSTATS_ADD(isr, hw_pm_mode_changes);
	DEBUGFS_FWSTATS_ADD(isr, host_acknowledges);
	DEBUGFS_FWSTATS_ADD(isr, pci_pm);
	DEBUGFS_FWSTATS_ADD(isr, wakeups);
	DEBUGFS_FWSTATS_ADD(isr, low_rssi);

	DEBUGFS_FWSTATS_ADD(wep, addr_key_count);
	DEBUGFS_FWSTATS_ADD(wep, default_key_count);
	/* skipping wep.reserved */
	DEBUGFS_FWSTATS_ADD(wep, key_not_found);
	DEBUGFS_FWSTATS_ADD(wep, decrypt_fail);
	DEBUGFS_FWSTATS_ADD(wep, packets);
	DEBUGFS_FWSTATS_ADD(wep, interrupt);

	DEBUGFS_FWSTATS_ADD(pwr, ps_enter);
	DEBUGFS_FWSTATS_ADD(pwr, elp_enter);
	DEBUGFS_FWSTATS_ADD(pwr, missing_bcns);
	DEBUGFS_FWSTATS_ADD(pwr, wake_on_host);
	DEBUGFS_FWSTATS_ADD(pwr, wake_on_timer_exp);
	DEBUGFS_FWSTATS_ADD(pwr, tx_with_ps);
	DEBUGFS_FWSTATS_ADD(pwr, tx_without_ps);
	DEBUGFS_FWSTATS_ADD(pwr, rcvd_beacons);
	DEBUGFS_FWSTATS_ADD(pwr, power_save_off);
	DEBUGFS_FWSTATS_ADD(pwr, enable_ps);
	DEBUGFS_FWSTATS_ADD(pwr, disable_ps);
	DEBUGFS_FWSTATS_ADD(pwr, fix_tsf_ps);
	/* skipping cont_miss_bcns_spread for now */
	DEBUGFS_FWSTATS_ADD(pwr, rcvd_awake_beacons);

	DEBUGFS_FWSTATS_ADD(mic, rx_pkts);
	DEBUGFS_FWSTATS_ADD(mic, calc_failure);

	DEBUGFS_FWSTATS_ADD(aes, encrypt_fail);
	DEBUGFS_FWSTATS_ADD(aes, decrypt_fail);
	DEBUGFS_FWSTATS_ADD(aes, encrypt_packets);
	DEBUGFS_FWSTATS_ADD(aes, decrypt_packets);
	DEBUGFS_FWSTATS_ADD(aes, encrypt_interrupt);
	DEBUGFS_FWSTATS_ADD(aes, decrypt_interrupt);

	DEBUGFS_FWSTATS_ADD(event, heart_beat);
	DEBUGFS_FWSTATS_ADD(event, calibration);
	DEBUGFS_FWSTATS_ADD(event, rx_mismatch);
	DEBUGFS_FWSTATS_ADD(event, rx_mem_empty);
	DEBUGFS_FWSTATS_ADD(event, rx_pool);
	DEBUGFS_FWSTATS_ADD(event, oom_late);
	DEBUGFS_FWSTATS_ADD(event, phy_transmit_error);
	DEBUGFS_FWSTATS_ADD(event, tx_stuck);

	DEBUGFS_FWSTATS_ADD(ps, pspoll_timeouts);
	DEBUGFS_FWSTATS_ADD(ps, upsd_timeouts);
	DEBUGFS_FWSTATS_ADD(ps, upsd_max_sptime);
	DEBUGFS_FWSTATS_ADD(ps, upsd_max_apturn);
	DEBUGFS_FWSTATS_ADD(ps, pspoll_max_apturn);
	DEBUGFS_FWSTATS_ADD(ps, pspoll_utilization);
	DEBUGFS_FWSTATS_ADD(ps, upsd_utilization);

	DEBUGFS_FWSTATS_ADD(rxpipe, rx_prep_beacon_drop);
	DEBUGFS_FWSTATS_ADD(rxpipe, descr_host_int_trig_rx_data);
	DEBUGFS_FWSTATS_ADD(rxpipe, beacon_buffer_thres_host_int_trig_rx_data);
	DEBUGFS_FWSTATS_ADD(rxpipe, missed_beacon_host_int_trig_rx_data);
	DEBUGFS_FWSTATS_ADD(rxpipe, tx_xfr_host_int_trig_rx_data);

	DEBUGFS_ADD(tx_queue_len, wl->rootdir);
	DEBUGFS_ADD(retry_count, wl->rootdir);
	DEBUGFS_ADD(excessive_retries, wl->rootdir);

	DEBUGFS_ADD(gpio_power, wl->rootdir);

	entry = debugfs_create_x32("debug_level", 0600, wl->rootdir,
	&wl12xx_debug_level);
	if (!entry \|\| IS_ERR(entry))
	goto err;

	return 0;

	err:
	if (IS_ERR(entry))
	ret = PTR_ERR(entry);
	else
	ret = -ENOMEM;

	return ret;
	}

	void wl1271_debugfs_reset(struct wl1271 *wl)
	{
	if (!wl->rootdir)
	return;

	memset(wl->stats.fw_stats, 0, sizeof(*wl->stats.fw_stats));
	wl->stats.retry_count = 0;
	wl->stats.excessive_retries = 0;
	}

	int wl1271_debugfs_init(struct wl1271 *wl)
	{
	int ret;

	wl->rootdir = debugfs_create_dir(KBUILD_MODNAME,
	wl->hw->wiphy->debugfsdir);

	if (IS_ERR(wl->rootdir)) {
	ret = PTR_ERR(wl->rootdir);
	wl->rootdir = NULL;
	goto err;
	}

	wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats),
	GFP_KERNEL);

	if (!wl->stats.fw_stats) {
	ret = -ENOMEM;
	goto err_fw;
	}

	wl->stats.fw_stats_update = jiffies;

	ret = wl1271_debugfs_add_files(wl);

	if (ret < 0)
	goto err_file;

	return 0;

	err_file:
	kfree(wl->stats.fw_stats);
	wl->stats.fw_stats = NULL;

	err_fw:
	debugfs_remove_recursive(wl->rootdir);
	wl->rootdir = NULL;

	err:
	return ret;
	}

	void wl1271_debugfs_exit(struct wl1271 *wl)
	{
	kfree(wl->stats.fw_stats);
	wl->stats.fw_stats = NULL;

	debugfs_remove_recursive(wl->rootdir);
	wl->rootdir = NULL;

	}