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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 | { | |
a0497f9f FF |
21 | const struct mcs_group *mg; |
22 | unsigned int j, tp, prob, eprob; | |
23 | char htmode = '2'; | |
24 | char gimode = 'L'; | |
8ec7886b | 25 | u32 gflags; |
a0497f9f FF |
26 | |
27 | if (!mi->groups[i].supported) | |
28 | return p; | |
29 | ||
30 | mg = &minstrel_mcs_groups[i]; | |
8ec7886b KB |
31 | gflags = mg->flags; |
32 | ||
33 | if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
a0497f9f | 34 | htmode = '4'; |
8ec7886b | 35 | else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) |
9208247d | 36 | htmode = '8'; |
8ec7886b | 37 | if (gflags & IEEE80211_TX_RC_SHORT_GI) |
a0497f9f FF |
38 | gimode = 'S'; |
39 | ||
40 | for (j = 0; j < MCS_GROUP_RATES; j++) { | |
41 | struct minstrel_rate_stats *mr = &mi->groups[i].rates[j]; | |
42 | static const int bitrates[4] = { 10, 20, 55, 110 }; | |
43 | int idx = i * MCS_GROUP_RATES + j; | |
44 | ||
45 | if (!(mi->groups[i].supported & BIT(j))) | |
46 | continue; | |
47 | ||
8ec7886b KB |
48 | if (gflags & IEEE80211_TX_RC_MCS) |
49 | p += sprintf(p, " HT%c0/%cGI ", htmode, gimode); | |
50 | else if (gflags & IEEE80211_TX_RC_VHT_MCS) | |
9208247d | 51 | p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode); |
a0497f9f | 52 | else |
8ec7886b | 53 | p += sprintf(p, " CCK/%cP ", j < 4 ? 'L' : 'S'); |
a0497f9f | 54 | |
5935839a TH |
55 | *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; |
56 | *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; | |
57 | *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; | |
58 | *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; | |
a0497f9f FF |
59 | *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; |
60 | ||
8ec7886b KB |
61 | if (gflags & IEEE80211_TX_RC_MCS) { |
62 | p += sprintf(p, " MCS%-2u ", (mg->streams - 1) * 8 + j); | |
63 | } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { | |
9208247d | 64 | p += sprintf(p, " MCS%-1u/%1u", j, mg->streams); |
a0497f9f | 65 | } else { |
8ec7886b KB |
66 | int r = bitrates[j % 4]; |
67 | ||
68 | p += sprintf(p, " %2u.%1uM ", r / 10, r % 10); | |
a0497f9f FF |
69 | } |
70 | ||
71 | tp = mr->cur_tp / 10; | |
72 | prob = MINSTREL_TRUNC(mr->cur_prob * 1000); | |
73 | eprob = MINSTREL_TRUNC(mr->probability * 1000); | |
74 | ||
11b2357d KB |
75 | p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u " |
76 | "%3u %4u(%4u) %9llu(%9llu)\n", | |
a0497f9f FF |
77 | tp / 10, tp % 10, |
78 | eprob / 10, eprob % 10, | |
79 | prob / 10, prob % 10, | |
80 | mr->retry_count, | |
81 | mr->last_success, | |
82 | mr->last_attempts, | |
83 | (unsigned long long)mr->succ_hist, | |
84 | (unsigned long long)mr->att_hist); | |
85 | } | |
86 | ||
87 | return p; | |
88 | } | |
89 | ||
ec8aa669 FF |
90 | static int |
91 | minstrel_ht_stats_open(struct inode *inode, struct file *file) | |
92 | { | |
93 | struct minstrel_ht_sta_priv *msp = inode->i_private; | |
94 | struct minstrel_ht_sta *mi = &msp->ht; | |
95 | struct minstrel_debugfs_info *ms; | |
a0497f9f | 96 | unsigned int i; |
ec8aa669 FF |
97 | char *p; |
98 | int ret; | |
99 | ||
100 | if (!msp->is_ht) { | |
101 | inode->i_private = &msp->legacy; | |
102 | ret = minstrel_stats_open(inode, file); | |
103 | inode->i_private = msp; | |
104 | return ret; | |
105 | } | |
106 | ||
9208247d | 107 | ms = kmalloc(32768, GFP_KERNEL); |
ec8aa669 FF |
108 | if (!ms) |
109 | return -ENOMEM; | |
110 | ||
111 | file->private_data = ms; | |
112 | p = ms->buf; | |
9208247d | 113 | p += sprintf(p, " type rate tpt eprob *prob " |
11b2357d KB |
114 | "ret *ok(*cum) ok( cum)\n"); |
115 | ||
8a0ee4fe KB |
116 | p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p); |
117 | for (i = 0; i < MINSTREL_CCK_GROUP; i++) | |
a0497f9f | 118 | p = minstrel_ht_stats_dump(mi, i, p); |
9208247d KB |
119 | for (i++; i < ARRAY_SIZE(mi->groups); i++) |
120 | p = minstrel_ht_stats_dump(mi, i, p); | |
ec8aa669 | 121 | |
ec8aa669 FF |
122 | p += sprintf(p, "\nTotal packet count:: ideal %d " |
123 | "lookaround %d\n", | |
124 | max(0, (int) mi->total_packets - (int) mi->sample_packets), | |
125 | mi->sample_packets); | |
126 | p += sprintf(p, "Average A-MPDU length: %d.%d\n", | |
127 | MINSTREL_TRUNC(mi->avg_ampdu_len), | |
128 | MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); | |
129 | ms->len = p - ms->buf; | |
130 | ||
9208247d | 131 | WARN_ON(ms->len + sizeof(*ms) > 32768); |
11b2357d | 132 | |
a0572d93 | 133 | return nonseekable_open(inode, file); |
ec8aa669 FF |
134 | } |
135 | ||
136 | static const struct file_operations minstrel_ht_stat_fops = { | |
137 | .owner = THIS_MODULE, | |
138 | .open = minstrel_ht_stats_open, | |
139 | .read = minstrel_stats_read, | |
140 | .release = minstrel_stats_release, | |
a0572d93 | 141 | .llseek = no_llseek, |
ec8aa669 FF |
142 | }; |
143 | ||
144 | void | |
145 | minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) | |
146 | { | |
147 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
148 | ||
149 | msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, | |
150 | &minstrel_ht_stat_fops); | |
151 | } | |
152 | ||
153 | void | |
154 | minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) | |
155 | { | |
156 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
157 | ||
158 | debugfs_remove(msp->dbg_stats); | |
159 | } |