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 extern const struct mcs_group minstrel_mcs_groups[];
34 struct minstrel_rate_stats {
35 /* current / last sampling period attempts/success counters */
36 unsigned int attempts, last_attempts;
37 unsigned int success, last_success;
39 /* total attempts/success counters */
40 u64 att_hist, succ_hist;
42 /* current throughput */
45 /* packet delivery probabilities */
46 unsigned int cur_prob, probability;
48 /* maximum retry counts */
49 unsigned int retry_count;
50 unsigned int retry_count_rtscts;
56 struct minstrel_mcs_group_data {
60 /* bitfield of supported MCS rates of this group */
63 /* selected primary rates */
64 unsigned int max_tp_rate;
65 unsigned int max_tp_rate2;
66 unsigned int max_prob_rate;
68 /* MCS rate statistics */
69 struct minstrel_rate_stats rates[MCS_GROUP_RATES];
72 struct minstrel_ht_sta {
73 /* ampdu length (average, per sampling interval) */
74 unsigned int ampdu_len;
75 unsigned int ampdu_packets;
77 /* ampdu length (EWMA) */
78 unsigned int avg_ampdu_len;
80 /* best throughput rate */
81 unsigned int max_tp_rate;
83 /* second best throughput rate */
84 unsigned int max_tp_rate2;
86 /* best probability rate */
87 unsigned int max_prob_rate;
89 /* time of last status update */
90 unsigned long stats_update;
92 /* overhead time in usec for each frame */
93 unsigned int overhead;
94 unsigned int overhead_rtscts;
96 unsigned int total_packets;
97 unsigned int sample_packets;
99 /* tx flags to add for frames for this sta */
107 /* current MCS group to be sampled */
110 /* MCS rate group info and statistics */
111 struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS];
114 struct minstrel_ht_sta_priv {
116 struct minstrel_ht_sta ht;
117 struct minstrel_sta_info legacy;
119 #ifdef CONFIG_MAC80211_DEBUGFS
120 struct dentry *dbg_stats;
127 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
128 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);