[GitHub/mt8127/android_kernel_alcatel_ttab.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 <net/mac80211.h>
#include "rc80211_minstrel.h"

struct minstrel_stats_info {
	struct minstrel_sta_info *mi;
	char buf[4096];
	size_t len;
};

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

	ms = kmalloc(sizeof(*ms), 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 * 96) / 18000) >> 10;
		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;
}

static ssize_t
minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
{
	struct minstrel_stats_info *ms;
	char *src;

	ms = file->private_data;
	src = ms->buf;

	len = min(len, ms->len);
	if (len <= *o)
		return 0;

	src += *o;
	len -= *o;
	*o += len;

	if (copy_to_user(buf, src, len))
		return -EFAULT;

	return len;
}

static int
minstrel_stats_release(struct inode *inode, struct file *file)
{
	struct minstrel_stats_info *ms = file->private_data;

	kfree(ms);

	return 0;
}

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

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>
	52	#include <net/mac80211.h>
	53	#include "rc80211_minstrel.h"
	54
	55	struct minstrel_stats_info {
	56	struct minstrel_sta_info *mi;
	57	char buf[4096];
	58	size_t len;
	59	};
	60
	61	static int
	62	minstrel_stats_open(struct inode inode, struct file file)
	63	{
	64	struct minstrel_sta_info *mi = inode->i_private;
65	struct minstrel_stats_info *ms;
66	unsigned int i, tp, prob, eprob;
67	char *p;
68
69	ms = kmalloc(sizeof(*ms), GFP_KERNEL);
70	if (!ms)
71	return -ENOMEM;
72
73	file->private_data = ms;
74	p = ms->buf;
75	p += sprintf(p, "rate throughput ewma prob this prob "
76	"this succ/attempt success attempts\n");
77	for (i = 0; i < mi->n_rates; i++) {
78	struct minstrel_rate *mr = &mi->r[i];
79
80	*(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
81	*(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
82	*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
83	p += sprintf(p, "%3u%s", mr->bitrate / 2,
84	(mr->bitrate & 1 ? ".5" : " "));
85
86	tp = ((mr->cur_tp * 96) / 18000) >> 10;
87	prob = mr->cur_prob / 18;
88	eprob = mr->probability / 18;
89
90	p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
91	"%3u(%3u) %8llu %8llu\n",
92	tp / 10, tp % 10,
93	eprob / 10, eprob % 10,
94	prob / 10, prob % 10,
95	mr->last_success,
96	mr->last_attempts,
51b94bf0 JL	97	(unsigned long long)mr->succ_hist,
51b94bf0 JL	98	(unsigned long long)mr->att_hist);
cccf129f FF	99	}
	100	p += sprintf(p, "\nTotal packet count:: ideal %d "
	101	"lookaround %d\n\n",
	102	mi->packet_count - mi->sample_count,
	103	mi->sample_count);
	104	ms->len = p - ms->buf;
	105
	106	return 0;
	107	}
	108
51b94bf0	109	static ssize_t
cccf129f FF	110	minstrel_stats_read(struct file file, char __user buf, size_t len, loff_t *o)
	111	{
	112	struct minstrel_stats_info *ms;
	113	char *src;
	114
	115	ms = file->private_data;
	116	src = ms->buf;
	117
	118	len = min(len, ms->len);
	119	if (len <= *o)
	120	return 0;
	121
	122	src += *o;
	123	len -= *o;
	124	*o += len;
	125
	126	if (copy_to_user(buf, src, len))
	127	return -EFAULT;
	128
	129	return len;
	130	}
	131
	132	static int
	133	minstrel_stats_release(struct inode inode, struct file file)
	134	{
	135	struct minstrel_stats_info *ms = file->private_data;
	136
	137	kfree(ms);
	138
	139	return 0;
	140	}
	141
	142	static struct file_operations minstrel_stat_fops = {
	143	.owner = THIS_MODULE,
	144	.open = minstrel_stats_open,
	145	.read = minstrel_stats_read,
	146	.release = minstrel_stats_release,
	147	};
	148
	149	void
	150	minstrel_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	151	{
	152	struct minstrel_sta_info *mi = priv_sta;
	153
	154	mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
	155	&minstrel_stat_fops);
	156	}
	157
	158	void
	159	minstrel_remove_sta_debugfs(void priv, void priv_sta)
	160	{
	161	struct minstrel_sta_info *mi = priv_sta;
	162
	163	debugfs_remove(mi->dbg_stats);
	164	}