linux/net/mac80211/rc80211_minstrel_ht.h
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   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
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