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 <linux/slab.h>
53 #include <linux/export.h>
54 #include <net/mac80211.h>
55 #include "rc80211_minstrel.h"
56
57 ssize_t
minstrel_stats_read(struct file * file,char __user * buf,size_t len,loff_t * ppos)58 minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
59 {
60 struct minstrel_debugfs_info *ms;
61
62 ms = file->private_data;
63 return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
64 }
65
66 int
minstrel_stats_release(struct inode * inode,struct file * file)67 minstrel_stats_release(struct inode *inode, struct file *file)
68 {
69 kfree(file->private_data);
70 return 0;
71 }
72
73 int
minstrel_stats_open(struct inode * inode,struct file * file)74 minstrel_stats_open(struct inode *inode, struct file *file)
75 {
76 struct minstrel_sta_info *mi = inode->i_private;
77 struct minstrel_debugfs_info *ms;
78 unsigned int i, tp_max, tp_avg, eprob;
79 char *p;
80
81 ms = kmalloc(2048, GFP_KERNEL);
82 if (!ms)
83 return -ENOMEM;
84
85 file->private_data = ms;
86 p = ms->buf;
87 p += sprintf(p, "\n");
88 p += sprintf(p,
89 "best __________rate_________ ________statistics________ ____last_____ ______sum-of________\n");
90 p += sprintf(p,
91 "rate [name idx airtime max_tp] [avg(tp) avg(prob) sd(prob)] [retry|suc|att] [#success | #attempts]\n");
92
93 for (i = 0; i < mi->n_rates; i++) {
94 struct minstrel_rate *mr = &mi->r[i];
95 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
96 unsigned int prob_ewmsd;
97
98 *(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' ';
99 *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
100 *(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
101 *(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
102 *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
103
104 p += sprintf(p, " %3u%s ", mr->bitrate / 2,
105 (mr->bitrate & 1 ? ".5" : " "));
106 p += sprintf(p, "%3u ", i);
107 p += sprintf(p, "%6u ", mr->perfect_tx_time);
108
109 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
110 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
111 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
112 prob_ewmsd = minstrel_get_ewmsd10(mrs);
113
114 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u"
115 " %3u %3u %-3u "
116 "%9llu %-9llu\n",
117 tp_max / 10, tp_max % 10,
118 tp_avg / 10, tp_avg % 10,
119 eprob / 10, eprob % 10,
120 prob_ewmsd / 10, prob_ewmsd % 10,
121 mrs->retry_count,
122 mrs->last_success,
123 mrs->last_attempts,
124 (unsigned long long)mrs->succ_hist,
125 (unsigned long long)mrs->att_hist);
126 }
127 p += sprintf(p, "\nTotal packet count:: ideal %d "
128 "lookaround %d\n\n",
129 mi->total_packets - mi->sample_packets,
130 mi->sample_packets);
131 ms->len = p - ms->buf;
132
133 WARN_ON(ms->len + sizeof(*ms) > 2048);
134
135 return 0;
136 }
137
138 static const struct file_operations minstrel_stat_fops = {
139 .owner = THIS_MODULE,
140 .open = minstrel_stats_open,
141 .read = minstrel_stats_read,
142 .release = minstrel_stats_release,
143 .llseek = default_llseek,
144 };
145
146 int
minstrel_stats_csv_open(struct inode * inode,struct file * file)147 minstrel_stats_csv_open(struct inode *inode, struct file *file)
148 {
149 struct minstrel_sta_info *mi = inode->i_private;
150 struct minstrel_debugfs_info *ms;
151 unsigned int i, tp_max, tp_avg, eprob;
152 char *p;
153
154 ms = kmalloc(2048, GFP_KERNEL);
155 if (!ms)
156 return -ENOMEM;
157
158 file->private_data = ms;
159 p = ms->buf;
160
161 for (i = 0; i < mi->n_rates; i++) {
162 struct minstrel_rate *mr = &mi->r[i];
163 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
164 unsigned int prob_ewmsd;
165
166 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
167 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
168 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
169 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
170 p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));
171
172 p += sprintf(p, ",%u%s", mr->bitrate / 2,
173 (mr->bitrate & 1 ? ".5," : ","));
174 p += sprintf(p, "%u,", i);
175 p += sprintf(p, "%u,",mr->perfect_tx_time);
176
177 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
178 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
179 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
180 prob_ewmsd = minstrel_get_ewmsd10(mrs);
181
182 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u,"
183 "%llu,%llu,%d,%d\n",
184 tp_max / 10, tp_max % 10,
185 tp_avg / 10, tp_avg % 10,
186 eprob / 10, eprob % 10,
187 prob_ewmsd / 10, prob_ewmsd % 10,
188 mrs->retry_count,
189 mrs->last_success,
190 mrs->last_attempts,
191 (unsigned long long)mrs->succ_hist,
192 (unsigned long long)mrs->att_hist,
193 mi->total_packets - mi->sample_packets,
194 mi->sample_packets);
195
196 }
197 ms->len = p - ms->buf;
198
199 WARN_ON(ms->len + sizeof(*ms) > 2048);
200
201 return 0;
202 }
203
204 static const struct file_operations minstrel_stat_csv_fops = {
205 .owner = THIS_MODULE,
206 .open = minstrel_stats_csv_open,
207 .read = minstrel_stats_read,
208 .release = minstrel_stats_release,
209 .llseek = default_llseek,
210 };
211
212 void
minstrel_add_sta_debugfs(void * priv,void * priv_sta,struct dentry * dir)213 minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
214 {
215 struct minstrel_sta_info *mi = priv_sta;
216
217 mi->dbg_stats = debugfs_create_file("rc_stats", 0444, dir, mi,
218 &minstrel_stat_fops);
219
220 mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, mi,
221 &minstrel_stat_csv_fops);
222 }
223
224 void
minstrel_remove_sta_debugfs(void * priv,void * priv_sta)225 minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
226 {
227 struct minstrel_sta_info *mi = priv_sta;
228
229 debugfs_remove(mi->dbg_stats);
230
231 debugfs_remove(mi->dbg_stats_csv);
232 }
233
