2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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.
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 <linux/export.h>
14 #include <net/mac80211.h>
15 #include "rc80211_minstrel.h"
16 #include "rc80211_minstrel_ht.h"
19 minstrel_ht_stats_open(struct inode *inode, struct file *file)
21 struct minstrel_ht_sta_priv *msp = inode->i_private;
22 struct minstrel_ht_sta *mi = &msp->ht;
23 struct minstrel_debugfs_info *ms;
24 unsigned int i, j, tp, prob, eprob;
29 inode->i_private = &msp->legacy;
30 ret = minstrel_stats_open(inode, file);
31 inode->i_private = msp;
35 ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);
39 file->private_data = ms;
41 p += sprintf(p, "type rate throughput ewma prob this prob "
42 "retry this succ/attempt success attempts\n");
43 for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) {
47 if (!mi->groups[i].supported)
50 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
52 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI)
55 for (j = 0; j < MCS_GROUP_RATES; j++) {
56 struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
57 int idx = i * MCS_GROUP_RATES + j;
59 if (!(mi->groups[i].supported & BIT(j)))
62 p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
64 *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
65 *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
66 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
67 p += sprintf(p, " MCS%-2u", (minstrel_mcs_groups[i].streams - 1) *
71 prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
72 eprob = MINSTREL_TRUNC(mr->probability * 1000);
74 p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
75 "%3u %3u(%3u) %8llu %8llu\n",
77 eprob / 10, eprob % 10,
82 (unsigned long long)mr->succ_hist,
83 (unsigned long long)mr->att_hist);
86 p += sprintf(p, "\nTotal packet count:: ideal %d "
88 max(0, (int) mi->total_packets - (int) mi->sample_packets),
90 p += sprintf(p, "Average A-MPDU length: %d.%d\n",
91 MINSTREL_TRUNC(mi->avg_ampdu_len),
92 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
93 ms->len = p - ms->buf;
95 return nonseekable_open(inode, file);
98 static const struct file_operations minstrel_ht_stat_fops = {
100 .open = minstrel_ht_stats_open,
101 .read = minstrel_stats_read,
102 .release = minstrel_stats_release,
107 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
109 struct minstrel_ht_sta_priv *msp = priv_sta;
111 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
112 &minstrel_ht_stat_fops);
116 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
118 struct minstrel_ht_sta_priv *msp = priv_sta;
120 debugfs_remove(msp->dbg_stats);