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review.evervolv.com / android_kernel_htc_msm8960 / a50b51d79a71400337ff328825574e5b4b34404e / . / net / mac80211 / rc80211_minstrel_ht.h
blob: 462d2b227ed579682e7fe64fc2556377320263fa [file] [log] [blame]
Felix Fietkauec8aa662010-05-13 16:48:03 +0200[diff] [blame]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
9#ifndef __RC_MINSTREL_HT_H
10#define __RC_MINSTREL_HT_H
11
12/*
13 * The number of streams can be changed to 2 to reduce code
14 * size and memory footprint.
15 */
16#define MINSTREL_MAX_STREAMS 3
17#define MINSTREL_STREAM_GROUPS 4
18
19/* scaled fraction values */
20#define MINSTREL_SCALE 16
21#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
22#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
23
24#define MCS_GROUP_RATES 8
25
26struct mcs_group {
27 u32 flags;
28 unsigned int streams;
29 unsigned int duration[MCS_GROUP_RATES];
30};
31
John W. Linvillede66bfd2010-06-24 13:03:14 -0400[diff] [blame]32extern const struct mcs_group minstrel_mcs_groups[];
33
Felix Fietkauec8aa662010-05-13 16:48:03 +0200[diff] [blame]34struct minstrel_rate_stats {
35 /* current / last sampling period attempts/success counters */
36 unsigned int attempts, last_attempts;
37 unsigned int success, last_success;
38
39 /* total attempts/success counters */
40 u64 att_hist, succ_hist;
41
42 /* current throughput */
43 unsigned int cur_tp;
44
45 /* packet delivery probabilities */
46 unsigned int cur_prob, probability;
47
48 /* maximum retry counts */
49 unsigned int retry_count;
50 unsigned int retry_count_rtscts;
51
52 bool retry_updated;
53 u8 sample_skipped;
54};
55
56struct minstrel_mcs_group_data {
57 u8 index;
58 u8 column;
59
60 /* bitfield of supported MCS rates of this group */
61 u8 supported;
62
63 /* selected primary rates */
64 unsigned int max_tp_rate;
65 unsigned int max_tp_rate2;
66 unsigned int max_prob_rate;
67
68 /* MCS rate statistics */
69 struct minstrel_rate_stats rates[MCS_GROUP_RATES];
70};
71
72struct minstrel_ht_sta {
73 /* ampdu length (average, per sampling interval) */
74 unsigned int ampdu_len;
75 unsigned int ampdu_packets;
76
77 /* ampdu length (EWMA) */
78 unsigned int avg_ampdu_len;
79
80 /* best throughput rate */
81 unsigned int max_tp_rate;
82
83 /* second best throughput rate */
84 unsigned int max_tp_rate2;
85
86 /* best probability rate */
87 unsigned int max_prob_rate;
88
89 /* time of last status update */
90 unsigned long stats_update;
91
92 /* overhead time in usec for each frame */
93 unsigned int overhead;
94 unsigned int overhead_rtscts;
95
96 unsigned int total_packets;
97 unsigned int sample_packets;
98
99 /* tx flags to add for frames for this sta */
100 u32 tx_flags;
101
102 u8 sample_wait;
103 u8 sample_tries;
104 u8 sample_count;
105 u8 sample_slow;
106
107 /* current MCS group to be sampled */
108 u8 sample_group;
109
110 /* MCS rate group info and statistics */
111 struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS];
112};
113
114struct minstrel_ht_sta_priv {
115 union {
116 struct minstrel_ht_sta ht;
117 struct minstrel_sta_info legacy;
118 };
119#ifdef CONFIG_MAC80211_DEBUGFS
120 struct dentry *dbg_stats;
121#endif
122 void *ratelist;
123 void *sample_table;
124 bool is_ht;
125};
126
127void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
128void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
129
130#endif