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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 <linux/slab.h>
53#include <linux/export.h>
54#include <net/mac80211.h>
55#include "rc80211_minstrel.h"
56
57int
58minstrel_stats_open(struct inode *inode, struct file *file)
59{
60 struct minstrel_sta_info *mi = inode->i_private;
61 struct minstrel_debugfs_info *ms;
62 unsigned int i, tp, prob, eprob;
63 char *p;
64
65 ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
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[0]) ? 'A' : ' ';
77 *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
78 *(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
79 *(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
80 *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
81 p += sprintf(p, "%3u%s", mr->bitrate / 2,
82 (mr->bitrate & 1 ? ".5" : " "));
83
84 tp = MINSTREL_TRUNC(mr->cur_tp / 10);
85 prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
86 eprob = MINSTREL_TRUNC(mr->probability * 1000);
87
88 p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
89 " %3u(%3u) %8llu %8llu\n",
90 tp / 10, tp % 10,
91 eprob / 10, eprob % 10,
92 prob / 10, prob % 10,
93 mr->last_success,
94 mr->last_attempts,
95 (unsigned long long)mr->succ_hist,
96 (unsigned long long)mr->att_hist);
97 }
98 p += sprintf(p, "\nTotal packet count:: ideal %d "
99 "lookaround %d\n\n",
100 mi->packet_count - mi->sample_count,
101 mi->sample_count);
102 ms->len = p - ms->buf;
103
104 return 0;
105}
106
107ssize_t
108minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
109{
110 struct minstrel_debugfs_info *ms;
111
112 ms = file->private_data;
113 return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
114}
115
116int
117minstrel_stats_release(struct inode *inode, struct file *file)
118{
119 kfree(file->private_data);
120 return 0;
121}
122
123static const struct file_operations minstrel_stat_fops = {
124 .owner = THIS_MODULE,
125 .open = minstrel_stats_open,
126 .read = minstrel_stats_read,
127 .release = minstrel_stats_release,
128 .llseek = default_llseek,
129};
130
131void
132minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
133{
134 struct minstrel_sta_info *mi = priv_sta;
135
136 mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
137 &minstrel_stat_fops);
138}
139
140void
141minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
142{
143 struct minstrel_sta_info *mi = priv_sta;
144
145 debugfs_remove(mi->dbg_stats);
146}
147
