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ec8aa669 FF |
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> | |
bc3b2d7f | 13 | #include <linux/export.h> |
ec8aa669 FF |
14 | #include <net/mac80211.h> |
15 | #include "rc80211_minstrel.h" | |
16 | #include "rc80211_minstrel_ht.h" | |
17 | ||
a0497f9f FF |
18 | static char * |
19 | minstrel_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 { | |
7a5e3fa2 | 57 | p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j); |
a0497f9f FF |
58 | } |
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 | ||
ec8aa669 FF |
79 | static int |
80 | minstrel_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; | |
a0497f9f FF |
85 | unsigned int i; |
86 | unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; | |
ec8aa669 FF |
87 | 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; | |
7f4fe17b FF |
103 | p += sprintf(p, "type rate throughput ewma prob this prob " |
104 | "retry this succ/attempt success attempts\n"); | |
ec8aa669 | 105 | |
a0497f9f FF |
106 | 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); | |
ec8aa669 | 109 | |
ec8aa669 FF |
110 | 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 | ||
a0572d93 | 119 | return nonseekable_open(inode, file); |
ec8aa669 FF |
120 | } |
121 | ||
122 | static 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, | |
a0572d93 | 127 | .llseek = no_llseek, |
ec8aa669 FF |
128 | }; |
129 | ||
130 | void | |
131 | minstrel_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 | ||
139 | void | |
140 | minstrel_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 | } |