[deliverable/linux.git] / net / mac80211 / rc80211_minstrel_debugfs.c

/*
 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
 *
 * 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.
 *
 * Based on minstrel.c:
 *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
 *   Sponsored by Indranet Technologies Ltd
 *
 * Based on sample.c:
 *   Copyright (c) 2005 John Bicket
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer,
 *      without modification.
 *   2. Redistributions in binary form must reproduce at minimum a disclaimer
 *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *      redistribution must be conditioned upon including a substantially
 *      similar Disclaimer requirement for further binary redistribution.
 *   3. Neither the names of the above-listed copyright holders nor the names
 *      of any contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 *   Alternatively, this software may be distributed under the terms of the
 *   GNU General Public License ("GPL") version 2 as published by the Free
 *   Software Foundation.
 *
 *   NO WARRANTY
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
 *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *   THE POSSIBILITY OF SUCH DAMAGES.
 */
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/debugfs.h>
#include <linux/ieee80211.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <net/mac80211.h>
#include "rc80211_minstrel.h"

int
minstrel_stats_open(struct inode *inode, struct file *file)
{
	struct minstrel_sta_info *mi = inode->i_private;
	struct minstrel_debugfs_info *ms;
	unsigned int i, tp, prob, eprob;
	char *p;

	ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
	if (!ms)
		return -ENOMEM;

	file->private_data = ms;
	p = ms->buf;
	p += sprintf(p, "rate     throughput  ewma prob   this prob  "
			"this succ/attempt   success    attempts\n");
	for (i = 0; i < mi->n_rates; i++) {
		struct minstrel_rate *mr = &mi->r[i];

		*(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
		*(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
		*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
		p += sprintf(p, "%3u%s", mr->bitrate / 2,
				(mr->bitrate & 1 ? ".5" : "  "));

		tp = mr->cur_tp / ((18000 << 10) / 96);
		prob = mr->cur_prob / 18;
		eprob = mr->probability / 18;

		p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "
				"%3u(%3u)   %8llu    %8llu\n",
				tp / 10, tp % 10,
				eprob / 10, eprob % 10,
				prob / 10, prob % 10,
				mr->last_success,
				mr->last_attempts,
				(unsigned long long)mr->succ_hist,
				(unsigned long long)mr->att_hist);
	}
	p += sprintf(p, "\nTotal packet count::    ideal %d      "
			"lookaround %d\n\n",
			mi->packet_count - mi->sample_count,
			mi->sample_count);
	ms->len = p - ms->buf;

	return 0;
}

ssize_t
minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
{
	struct minstrel_debugfs_info *ms;

	ms = file->private_data;
	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
}

int
minstrel_stats_release(struct inode *inode, struct file *file)
{
	kfree(file->private_data);
	return 0;
}

static const struct file_operations minstrel_stat_fops = {
	.owner = THIS_MODULE,
	.open = minstrel_stats_open,
	.read = minstrel_stats_read,
	.release = minstrel_stats_release,
	.llseek = default_llseek,
};

void
minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
{
	struct minstrel_sta_info *mi = priv_sta;

	mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
			&minstrel_stat_fops);
}

void
minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
{
	struct minstrel_sta_info *mi = priv_sta;

	debugfs_remove(mi->dbg_stats);
}
Commit	Line	Data
cccf129f FF	1	/*
	2	* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* Based on minstrel.c:
	9	* Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
	10	* Sponsored by Indranet Technologies Ltd
	11	*
	12	* Based on sample.c:
	13	* Copyright (c) 2005 John Bicket
	14	* All rights reserved.
	15	*
	16	* Redistribution and use in source and binary forms, with or without
	17	* modification, are permitted provided that the following conditions
	18	* are met:
	19	* 1. Redistributions of source code must retain the above copyright
	20	* notice, this list of conditions and the following disclaimer,
	21	* without modification.
	22	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	23	* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
	24	* redistribution must be conditioned upon including a substantially
	25	* similar Disclaimer requirement for further binary redistribution.
	26	* 3. Neither the names of the above-listed copyright holders nor the names
	27	* of any contributors may be used to endorse or promote products derived
	28	* from this software without specific prior written permission.
	29	*
	30	* Alternatively, this software may be distributed under the terms of the
	31	* GNU General Public License ("GPL") version 2 as published by the Free
	32	* Software Foundation.
	33	*
	34	* NO WARRANTY
	35	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	36	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	37	* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
	38	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
	39	* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
	40	* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	41	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	42	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
	43	* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	44	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	45	* THE POSSIBILITY OF SUCH DAMAGES.
	46	*/
	47	#include <linux/netdevice.h>
	48	#include <linux/types.h>
	49	#include <linux/skbuff.h>
	50	#include <linux/debugfs.h>
	51	#include <linux/ieee80211.h>
5a0e3ad6	52	#include <linux/slab.h>
bc3b2d7f	53	#include <linux/export.h>
cccf129f FF	54	#include <net/mac80211.h>
	55	#include "rc80211_minstrel.h"
	56
eae44756	57	int
cccf129f FF	58	minstrel_stats_open(struct inode inode, struct file file)
	59	{
	60	struct minstrel_sta_info *mi = inode->i_private;
44ac91ea	61	struct minstrel_debugfs_info *ms;
cccf129f FF	62	unsigned int i, tp, prob, eprob;
	63	char *p;
	64
44ac91ea	65	ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
cccf129f FF	66	if (!ms)
	67	return -ENOMEM;
	68
	69	file->private_data = ms;
	70	p = ms->buf;
	71	p += sprintf(p, "rate throughput ewma prob this prob "
	72	"this succ/attempt success attempts\n");
	73	for (i = 0; i < mi->n_rates; i++) {
	74	struct minstrel_rate *mr = &mi->r[i];
	75
	76	*(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
	77	*(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
	78	*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
	79	p += sprintf(p, "%3u%s", mr->bitrate / 2,
	80	(mr->bitrate & 1 ? ".5" : " "));
	81
eadac6bf	82	tp = mr->cur_tp / ((18000 << 10) / 96);
cccf129f FF	83	prob = mr->cur_prob / 18;
	84	eprob = mr->probability / 18;
	85
	86	p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
	87	"%3u(%3u) %8llu %8llu\n",
	88	tp / 10, tp % 10,
	89	eprob / 10, eprob % 10,
	90	prob / 10, prob % 10,
	91	mr->last_success,
	92	mr->last_attempts,
51b94bf0 JL	93	(unsigned long long)mr->succ_hist,
51b94bf0 JL	94	(unsigned long long)mr->att_hist);
cccf129f FF	95	}
	96	p += sprintf(p, "\nTotal packet count:: ideal %d "
	97	"lookaround %d\n\n",
	98	mi->packet_count - mi->sample_count,
	99	mi->sample_count);
	100	ms->len = p - ms->buf;
	101
	102	return 0;
	103	}
	104
eae44756	105	ssize_t
44ac91ea	106	minstrel_stats_read(struct file file, char __user buf, size_t len, loff_t *ppos)
cccf129f	107	{
44ac91ea	108	struct minstrel_debugfs_info *ms;
cccf129f FF	109
cccf129f FF	110	ms = file->private_data;
44ac91ea	111	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
cccf129f FF	112	}
cccf129f FF	113
eae44756	114	int
cccf129f FF	115	minstrel_stats_release(struct inode inode, struct file file)
cccf129f FF	116	{
44ac91ea	117	kfree(file->private_data);
cccf129f FF	118	return 0;
	119	}
	120
5ca1b998	121	static const struct file_operations minstrel_stat_fops = {
cccf129f FF	122	.owner = THIS_MODULE,
	123	.open = minstrel_stats_open,
	124	.read = minstrel_stats_read,
	125	.release = minstrel_stats_release,
6038f373	126	.llseek = default_llseek,
cccf129f FF	127	};
	128
	129	void
	130	minstrel_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	131	{
	132	struct minstrel_sta_info *mi = priv_sta;
	133
	134	mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
	135	&minstrel_stat_fops);
	136	}
	137
	138	void
	139	minstrel_remove_sta_debugfs(void priv, void priv_sta)
	140	{
	141	struct minstrel_sta_info *mi = priv_sta;
	142
	143	debugfs_remove(mi->dbg_stats);
	144	}