blob: 3e7d793de0c3407180965bb785485fd361700560 [file] [log] [blame]
Felix Fietkauec8aa662010-05-13 16:48:03 +02001/*
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>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040013#include <linux/export.h>
Felix Fietkauec8aa662010-05-13 16:48:03 +020014#include <net/mac80211.h>
15#include "rc80211_minstrel.h"
16#include "rc80211_minstrel_ht.h"
17
Felix Fietkaua0497f92013-02-13 10:51:08 +010018static char *
19minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
20{
21 unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
22 const struct mcs_group *mg;
23 unsigned int j, tp, prob, eprob;
24 char htmode = '2';
25 char gimode = 'L';
26
27 if (!mi->groups[i].supported)
28 return p;
29
30 mg = &minstrel_mcs_groups[i];
31 if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
32 htmode = '4';
33 if (mg->flags & IEEE80211_TX_RC_SHORT_GI)
34 gimode = 'S';
35
36 for (j = 0; j < MCS_GROUP_RATES; j++) {
37 struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
38 static const int bitrates[4] = { 10, 20, 55, 110 };
39 int idx = i * MCS_GROUP_RATES + j;
40
41 if (!(mi->groups[i].supported & BIT(j)))
42 continue;
43
44 if (i == max_mcs)
45 p += sprintf(p, "CCK/%cP ", j < 4 ? 'L' : 'S');
46 else
47 p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
48
49 *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
50 *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
51 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
52
53 if (i == max_mcs) {
54 int r = bitrates[j % 4];
55 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
56 } else {
Karl Beldan7a5e3fa2013-11-11 13:12:55 +010057 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
Felix Fietkaua0497f92013-02-13 10:51:08 +010058 }
59
60 tp = mr->cur_tp / 10;
61 prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
62 eprob = MINSTREL_TRUNC(mr->probability * 1000);
63
64 p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
65 "%3u %3u(%3u) %8llu %8llu\n",
66 tp / 10, tp % 10,
67 eprob / 10, eprob % 10,
68 prob / 10, prob % 10,
69 mr->retry_count,
70 mr->last_success,
71 mr->last_attempts,
72 (unsigned long long)mr->succ_hist,
73 (unsigned long long)mr->att_hist);
74 }
75
76 return p;
77}
78
Felix Fietkauec8aa662010-05-13 16:48:03 +020079static int
80minstrel_ht_stats_open(struct inode *inode, struct file *file)
81{
82 struct minstrel_ht_sta_priv *msp = inode->i_private;
83 struct minstrel_ht_sta *mi = &msp->ht;
84 struct minstrel_debugfs_info *ms;
Felix Fietkaua0497f92013-02-13 10:51:08 +010085 unsigned int i;
86 unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
Felix Fietkauec8aa662010-05-13 16:48:03 +020087 char *p;
88 int ret;
89
90 if (!msp->is_ht) {
91 inode->i_private = &msp->legacy;
92 ret = minstrel_stats_open(inode, file);
93 inode->i_private = msp;
94 return ret;
95 }
96
97 ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);
98 if (!ms)
99 return -ENOMEM;
100
101 file->private_data = ms;
102 p = ms->buf;
Felix Fietkau7f4fe172013-02-11 14:36:03 +0100103 p += sprintf(p, "type rate throughput ewma prob this prob "
104 "retry this succ/attempt success attempts\n");
Felix Fietkauec8aa662010-05-13 16:48:03 +0200105
Felix Fietkaua0497f92013-02-13 10:51:08 +0100106 p = minstrel_ht_stats_dump(mi, max_mcs, p);
107 for (i = 0; i < max_mcs; i++)
108 p = minstrel_ht_stats_dump(mi, i, p);
Felix Fietkauec8aa662010-05-13 16:48:03 +0200109
Felix Fietkauec8aa662010-05-13 16:48:03 +0200110 p += sprintf(p, "\nTotal packet count:: ideal %d "
111 "lookaround %d\n",
112 max(0, (int) mi->total_packets - (int) mi->sample_packets),
113 mi->sample_packets);
114 p += sprintf(p, "Average A-MPDU length: %d.%d\n",
115 MINSTREL_TRUNC(mi->avg_ampdu_len),
116 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
117 ms->len = p - ms->buf;
118
Arnd Bergmanna0572d92010-08-15 18:32:42 +0200119 return nonseekable_open(inode, file);
Felix Fietkauec8aa662010-05-13 16:48:03 +0200120}
121
122static const struct file_operations minstrel_ht_stat_fops = {
123 .owner = THIS_MODULE,
124 .open = minstrel_ht_stats_open,
125 .read = minstrel_stats_read,
126 .release = minstrel_stats_release,
Arnd Bergmanna0572d92010-08-15 18:32:42 +0200127 .llseek = no_llseek,
Felix Fietkauec8aa662010-05-13 16:48:03 +0200128};
129
130void
131minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
132{
133 struct minstrel_ht_sta_priv *msp = priv_sta;
134
135 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
136 &minstrel_ht_stat_fops);
137}
138
139void
140minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
141{
142 struct minstrel_ht_sta_priv *msp = priv_sta;
143
144 debugfs_remove(msp->dbg_stats);
145}