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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 | extern const struct mcs_group minstrel_mcs_groups[]; | |
18 | ||
19 | static int | |
20 | minstrel_ht_stats_open(struct inode *inode, struct file *file) | |
21 | { | |
22 | struct minstrel_ht_sta_priv *msp = inode->i_private; | |
23 | struct minstrel_ht_sta *mi = &msp->ht; | |
24 | struct minstrel_debugfs_info *ms; | |
25 | unsigned int i, j, tp, prob, eprob; | |
26 | char *p; | |
27 | int ret; | |
28 | ||
29 | if (!msp->is_ht) { | |
30 | inode->i_private = &msp->legacy; | |
31 | ret = minstrel_stats_open(inode, file); | |
32 | inode->i_private = msp; | |
33 | return ret; | |
34 | } | |
35 | ||
36 | ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL); | |
37 | if (!ms) | |
38 | return -ENOMEM; | |
39 | ||
40 | file->private_data = ms; | |
41 | p = ms->buf; | |
42 | p += sprintf(p, "type rate throughput ewma prob this prob " | |
43 | "this succ/attempt success attempts\n"); | |
44 | for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) { | |
45 | char htmode = '2'; | |
46 | char gimode = 'L'; | |
47 | ||
48 | if (!mi->groups[i].supported) | |
49 | continue; | |
50 | ||
51 | if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
52 | htmode = '4'; | |
53 | if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
54 | gimode = 'S'; | |
55 | ||
56 | for (j = 0; j < MCS_GROUP_RATES; j++) { | |
57 | struct minstrel_rate_stats *mr = &mi->groups[i].rates[j]; | |
58 | int idx = i * MCS_GROUP_RATES + j; | |
59 | ||
60 | if (!(mi->groups[i].supported & BIT(j))) | |
61 | continue; | |
62 | ||
63 | p += sprintf(p, "HT%c0/%cGI ", htmode, gimode); | |
64 | ||
65 | *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' '; | |
66 | *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' '; | |
67 | *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; | |
68 | p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].streams - 1) * | |
69 | MCS_GROUP_RATES + j); | |
70 | ||
71 | tp = mr->cur_tp / 10; | |
72 | prob = MINSTREL_TRUNC(mr->cur_prob * 1000); | |
73 | eprob = MINSTREL_TRUNC(mr->probability * 1000); | |
74 | ||
75 | p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u " | |
76 | "%3u(%3u) %8llu %8llu\n", | |
77 | tp / 10, tp % 10, | |
78 | eprob / 10, eprob % 10, | |
79 | prob / 10, prob % 10, | |
80 | mr->last_success, | |
81 | mr->last_attempts, | |
82 | (unsigned long long)mr->succ_hist, | |
83 | (unsigned long long)mr->att_hist); | |
84 | } | |
85 | } | |
86 | p += sprintf(p, "\nTotal packet count:: ideal %d " | |
87 | "lookaround %d\n", | |
88 | max(0, (int) mi->total_packets - (int) mi->sample_packets), | |
89 | 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; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static const struct file_operations minstrel_ht_stat_fops = { | |
99 | .owner = THIS_MODULE, | |
100 | .open = minstrel_ht_stats_open, | |
101 | .read = minstrel_stats_read, | |
102 | .release = minstrel_stats_release, | |
103 | }; | |
104 | ||
105 | void | |
106 | minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) | |
107 | { | |
108 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
109 | ||
110 | msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, | |
111 | &minstrel_ht_stat_fops); | |
112 | } | |
113 | ||
114 | void | |
115 | minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) | |
116 | { | |
117 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
118 | ||
119 | debugfs_remove(msp->dbg_stats); | |
120 | } |