path: root/drivers/net/wireless/wl12xx/debugfs.c

/*
 * 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 "debug.h"
#include "acx.h"
#include "ps.h"
#include "io.h"
#include "tx.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_ADD_PREFIX(prefix, name, parent)			\
	do {								\
		entry = debugfs_create_file(#name, 0400, parent,	\
				    wl, &prefix## _## name## _ops);	\
		if (!entry || IS_ERR(entry))				\
			goto err;					\
	} while (0);

#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);
	if (ret < 0)
		goto out;

	if (wl->state == WL1271_STATE_ON && !wl->plt &&
	    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