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 32extern const struct mcs_group minstrel_mcs_groups[]; 33 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 131