summaryrefslogtreecommitdiffstats
path: root/net/mac80211/rc80211_minstrel_debugfs.c
blob: 36fc971deb860e5ee3b3e70e9de2b5fd91f7ea95 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
/*
 * 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"

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;
}

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_max, tp_avg, eprob;
	char *p;

	ms = kmalloc(2048, GFP_KERNEL);
	if (!ms)
		return -ENOMEM;

	file->private_data = ms;
	p = ms->buf;
	p += sprintf(p, "\n");
	p += sprintf(p,
		     "best   __________rate_________    ________statistics________    ____last_____    ______sum-of________\n");
	p += sprintf(p,
		     "rate  [name idx airtime max_tp]  [avg(tp) avg(prob) sd(prob)]  [retry|suc|att]  [#success | #attempts]\n");

	for (i = 0; i < mi->n_rates; i++) {
		struct minstrel_rate *mr = &mi->r[i];
		struct minstrel_rate_stats *mrs = &mi->r[i].stats;
		unsigned int prob_ewmsd;

		*(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' ';
		*(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
		*(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
		*(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
		*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';

		p += sprintf(p, " %3u%s ", mr->bitrate / 2,
				(mr->bitrate & 1 ? ".5" : "  "));
		p += sprintf(p, "%3u  ", i);
		p += sprintf(p, "%6u ", mr->perfect_tx_time);

		tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
		tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
		eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
		prob_ewmsd = minstrel_get_ewmsd10(mrs);

		p += sprintf(p, "%4u.%1u    %4u.%1u     %3u.%1u    %3u.%1u"
				"     %3u   %3u %-3u   "
				"%9llu   %-9llu\n",
				tp_max / 10, tp_max % 10,
				tp_avg / 10, tp_avg % 10,
				eprob / 10, eprob % 10,
				prob_ewmsd / 10, prob_ewmsd % 10,
				mrs->retry_count,
				mrs->last_success,
				mrs->last_attempts,
				(unsigned long long)mrs->succ_hist,
				(unsigned long long)mrs->att_hist);
	}
	p += sprintf(p, "\nTotal packet count::    ideal %d      "
			"lookaround %d\n\n",
			mi->total_packets - mi->sample_packets,
			mi->sample_packets);
	ms->len = p - ms->buf;

	WARN_ON(ms->len + sizeof(*ms) > 2048);

	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,
};

int
minstrel_stats_csv_open(struct inode *inode, struct file *file)
{
	struct minstrel_sta_info *mi = inode->i_private;
	struct minstrel_debugfs_info *ms;
	unsigned int i, tp_max, tp_avg, eprob;
	char *p;

	ms = kmalloc(2048, GFP_KERNEL);
	if (!ms)
		return -ENOMEM;

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

	for (i = 0; i < mi->n_rates; i++) {
		struct minstrel_rate *mr = &mi->r[i];
		struct minstrel_rate_stats *mrs = &mi->r[i].stats;
		unsigned int prob_ewmsd;

		p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
		p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
		p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
		p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
		p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));

		p += sprintf(p, ",%u%s", mr->bitrate / 2,
				(mr->bitrate & 1 ? ".5," : ","));
		p += sprintf(p, "%u,", i);
		p += sprintf(p, "%u,",mr->perfect_tx_time);

		tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
		tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
		eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
		prob_ewmsd = minstrel_get_ewmsd10(mrs);

		p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u,"
				"%llu,%llu,%d,%d\n",
				tp_max / 10, tp_max % 10,
				tp_avg / 10, tp_avg % 10,
				eprob / 10, eprob % 10,
				prob_ewmsd / 10, prob_ewmsd % 10,
				mrs->retry_count,
				mrs->last_success,
				mrs->last_attempts,
				(unsigned long long)mrs->succ_hist,
				(unsigned long long)mrs->att_hist,
				mi->total_packets - mi->sample_packets,
				mi->sample_packets);

	}
	ms->len = p - ms->buf;

	WARN_ON(ms->len + sizeof(*ms) > 2048);

	return 0;
}

static const struct file_operations minstrel_stat_csv_fops = {
	.owner = THIS_MODULE,
	.open = minstrel_stats_csv_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);

	mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir,
			mi, &minstrel_stat_csv_fops);
}

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

	debugfs_remove(mi->dbg_stats);

	debugfs_remove(mi->dbg_stats_csv);
}