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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
55struct minstrel_stats_info {
56 struct minstrel_sta_info *mi;
57 char buf[4096];
58 size_t len;
59};
60
61static int
62minstrel_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 / ((18000 << 10) / 96);
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,
97 (unsigned long long)mr->succ_hist,
98 (unsigned long long)mr->att_hist);
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
109static ssize_t
110minstrel_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
132static int
133minstrel_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
142static const 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
149void
150minstrel_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
158void
159minstrel_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}
165
