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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 | ||
c8ca8c2f TH |
82 | tp = MINSTREL_TRUNC(mr->cur_tp / 10); |
83 | prob = MINSTREL_TRUNC(mr->cur_prob * 1000); | |
84 | eprob = MINSTREL_TRUNC(mr->probability * 1000); | |
cccf129f FF |
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, |
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 | |
110 | ms = file->private_data; | |
44ac91ea | 111 | return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len); |
cccf129f FF |
112 | } |
113 | ||
eae44756 | 114 | int |
cccf129f FF |
115 | minstrel_stats_release(struct inode *inode, struct file *file) |
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 | } |