2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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.
9 #ifndef __RC_MINSTREL_HT_H
10 #define __RC_MINSTREL_HT_H
13 * The number of streams can be changed to 2 to reduce code
14 * size and memory footprint.
16 #define MINSTREL_MAX_STREAMS 3
17 #define MINSTREL_STREAM_GROUPS 4
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)
24 #define MCS_GROUP_RATES 8
29 unsigned int duration[MCS_GROUP_RATES];
32 struct minstrel_rate_stats {
33 /* current / last sampling period attempts/success counters */
34 unsigned int attempts, last_attempts;
35 unsigned int success, last_success;
37 /* total attempts/success counters */
38 u64 att_hist, succ_hist;
40 /* current throughput */
43 /* packet delivery probabilities */
44 unsigned int cur_prob, probability;
46 /* maximum retry counts */
47 unsigned int retry_count;
48 unsigned int retry_count_rtscts;
54 struct minstrel_mcs_group_data {
58 /* bitfield of supported MCS rates of this group */
61 /* selected primary rates */
62 unsigned int max_tp_rate;
63 unsigned int max_tp_rate2;
64 unsigned int max_prob_rate;
66 /* MCS rate statistics */
67 struct minstrel_rate_stats rates[MCS_GROUP_RATES];
70 struct minstrel_ht_sta {
71 /* ampdu length (average, per sampling interval) */
72 unsigned int ampdu_len;
73 unsigned int ampdu_packets;
75 /* ampdu length (EWMA) */
76 unsigned int avg_ampdu_len;
78 /* best throughput rate */
79 unsigned int max_tp_rate;
81 /* second best throughput rate */
82 unsigned int max_tp_rate2;
84 /* best probability rate */
85 unsigned int max_prob_rate;
87 /* time of last status update */
88 unsigned long stats_update;
90 /* overhead time in usec for each frame */
91 unsigned int overhead;
92 unsigned int overhead_rtscts;
94 unsigned int total_packets;
95 unsigned int sample_packets;
97 /* tx flags to add for frames for this sta */
105 /* current MCS group to be sampled */
108 /* MCS rate group info and statistics */
109 struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS];
112 struct minstrel_ht_sta_priv {
114 struct minstrel_ht_sta ht;
115 struct minstrel_sta_info legacy;
117 #ifdef CONFIG_MAC80211_DEBUGFS
118 struct dentry *dbg_stats;
125 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
126 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);