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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 | ||
5935839a TH |
49 | *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; |
50 | *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; | |
51 | *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; | |
52 | *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; | |
a0497f9f FF |
53 | *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; |
54 | ||
55 | if (i == max_mcs) { | |
56 | int r = bitrates[j % 4]; | |
57 | p += sprintf(p, " %2u.%1uM", r / 10, r % 10); | |
58 | } else { | |
7a5e3fa2 | 59 | p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j); |
a0497f9f FF |
60 | } |
61 | ||
62 | tp = mr->cur_tp / 10; | |
63 | prob = MINSTREL_TRUNC(mr->cur_prob * 1000); | |
64 | eprob = MINSTREL_TRUNC(mr->probability * 1000); | |
65 | ||
66 | p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u " | |
67 | "%3u %3u(%3u) %8llu %8llu\n", | |
68 | tp / 10, tp % 10, | |
69 | eprob / 10, eprob % 10, | |
70 | prob / 10, prob % 10, | |
71 | mr->retry_count, | |
72 | mr->last_success, | |
73 | mr->last_attempts, | |
74 | (unsigned long long)mr->succ_hist, | |
75 | (unsigned long long)mr->att_hist); | |
76 | } | |
77 | ||
78 | return p; | |
79 | } | |
80 | ||
ec8aa669 FF |
81 | static int |
82 | minstrel_ht_stats_open(struct inode *inode, struct file *file) | |
83 | { | |
84 | struct minstrel_ht_sta_priv *msp = inode->i_private; | |
85 | struct minstrel_ht_sta *mi = &msp->ht; | |
86 | struct minstrel_debugfs_info *ms; | |
a0497f9f FF |
87 | unsigned int i; |
88 | unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; | |
ec8aa669 FF |
89 | char *p; |
90 | int ret; | |
91 | ||
92 | if (!msp->is_ht) { | |
93 | inode->i_private = &msp->legacy; | |
94 | ret = minstrel_stats_open(inode, file); | |
95 | inode->i_private = msp; | |
96 | return ret; | |
97 | } | |
98 | ||
99 | ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL); | |
100 | if (!ms) | |
101 | return -ENOMEM; | |
102 | ||
103 | file->private_data = ms; | |
104 | p = ms->buf; | |
5935839a TH |
105 | p += sprintf(p, "type rate throughput ewma prob " |
106 | "this prob retry this succ/attempt success attempts\n"); | |
ec8aa669 | 107 | |
a0497f9f FF |
108 | p = minstrel_ht_stats_dump(mi, max_mcs, p); |
109 | for (i = 0; i < max_mcs; i++) | |
110 | p = minstrel_ht_stats_dump(mi, i, p); | |
ec8aa669 | 111 | |
ec8aa669 FF |
112 | p += sprintf(p, "\nTotal packet count:: ideal %d " |
113 | "lookaround %d\n", | |
114 | max(0, (int) mi->total_packets - (int) mi->sample_packets), | |
115 | mi->sample_packets); | |
116 | p += sprintf(p, "Average A-MPDU length: %d.%d\n", | |
117 | MINSTREL_TRUNC(mi->avg_ampdu_len), | |
118 | MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); | |
119 | ms->len = p - ms->buf; | |
120 | ||
a0572d93 | 121 | return nonseekable_open(inode, file); |
ec8aa669 FF |
122 | } |
123 | ||
124 | static const struct file_operations minstrel_ht_stat_fops = { | |
125 | .owner = THIS_MODULE, | |
126 | .open = minstrel_ht_stats_open, | |
127 | .read = minstrel_stats_read, | |
128 | .release = minstrel_stats_release, | |
a0572d93 | 129 | .llseek = no_llseek, |
ec8aa669 FF |
130 | }; |
131 | ||
132 | void | |
133 | minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) | |
134 | { | |
135 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
136 | ||
137 | msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, | |
138 | &minstrel_ht_stat_fops); | |
139 | } | |
140 | ||
141 | void | |
142 | minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) | |
143 | { | |
144 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
145 | ||
146 | debugfs_remove(msp->dbg_stats); | |
147 | } |