mac80211: quiesce vif before suspending
[linux-2.6.git] / net / mac80211 / rc80211_minstrel_ht_debugfs.c
1 /*
2  * Copyright (C) 2010 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 #include <linux/netdevice.h>
9 #include <linux/types.h>
10 #include <linux/skbuff.h>
11 #include <linux/debugfs.h>
12 #include <linux/ieee80211.h>
13 #include <net/mac80211.h>
14 #include "rc80211_minstrel.h"
15 #include "rc80211_minstrel_ht.h"
16
17 static int
18 minstrel_ht_stats_open(struct inode *inode, struct file *file)
19 {
20         struct minstrel_ht_sta_priv *msp = inode->i_private;
21         struct minstrel_ht_sta *mi = &msp->ht;
22         struct minstrel_debugfs_info *ms;
23         unsigned int i, j, tp, prob, eprob;
24         char *p;
25         int ret;
26
27         if (!msp->is_ht) {
28                 inode->i_private = &msp->legacy;
29                 ret = minstrel_stats_open(inode, file);
30                 inode->i_private = msp;
31                 return ret;
32         }
33
34         ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);
35         if (!ms)
36                 return -ENOMEM;
37
38         file->private_data = ms;
39         p = ms->buf;
40         p += sprintf(p, "type      rate     throughput  ewma prob   this prob  "
41                         "this succ/attempt   success    attempts\n");
42         for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) {
43                 char htmode = '2';
44                 char gimode = 'L';
45
46                 if (!mi->groups[i].supported)
47                         continue;
48
49                 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
50                         htmode = '4';
51                 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI)
52                         gimode = 'S';
53
54                 for (j = 0; j < MCS_GROUP_RATES; j++) {
55                         struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
56                         int idx = i * MCS_GROUP_RATES + j;
57
58                         if (!(mi->groups[i].supported & BIT(j)))
59                                 continue;
60
61                         p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
62
63                         *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
64                         *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
65                         *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
66                         p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].streams - 1) *
67                                         MCS_GROUP_RATES + j);
68
69                         tp = mr->cur_tp / 10;
70                         prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
71                         eprob = MINSTREL_TRUNC(mr->probability * 1000);
72
73                         p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "
74                                         "%3u(%3u)   %8llu    %8llu\n",
75                                         tp / 10, tp % 10,
76                                         eprob / 10, eprob % 10,
77                                         prob / 10, prob % 10,
78                                         mr->last_success,
79                                         mr->last_attempts,
80                                         (unsigned long long)mr->succ_hist,
81                                         (unsigned long long)mr->att_hist);
82                 }
83         }
84         p += sprintf(p, "\nTotal packet count::    ideal %d      "
85                         "lookaround %d\n",
86                         max(0, (int) mi->total_packets - (int) mi->sample_packets),
87                         mi->sample_packets);
88         p += sprintf(p, "Average A-MPDU length: %d.%d\n",
89                 MINSTREL_TRUNC(mi->avg_ampdu_len),
90                 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
91         ms->len = p - ms->buf;
92
93         return nonseekable_open(inode, file);
94 }
95
96 static const struct file_operations minstrel_ht_stat_fops = {
97         .owner = THIS_MODULE,
98         .open = minstrel_ht_stats_open,
99         .read = minstrel_stats_read,
100         .release = minstrel_stats_release,
101         .llseek = no_llseek,
102 };
103
104 void
105 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
106 {
107         struct minstrel_ht_sta_priv *msp = priv_sta;
108
109         msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
110                         &minstrel_ht_stat_fops);
111 }
112
113 void
114 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
115 {
116         struct minstrel_ht_sta_priv *msp = priv_sta;
117
118         debugfs_remove(msp->dbg_stats);
119 }