net/mac80211/rc80211_minstrel_ht.h

   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 #define MCS_GROUP_RATES 8
  20
  21 struct mcs_group {
  22         u32 flags;
  23         unsigned int streams;
  24         unsigned int duration[MCS_GROUP_RATES];
  25 };
  26
  27 extern const struct mcs_group minstrel_mcs_groups[];
  28
  29 struct minstrel_rate_stats {
  30         /* current / last sampling period attempts/success counters */
  31         unsigned int attempts, last_attempts;
  32         unsigned int success, last_success;
  33
  34         /* total attempts/success counters */
  35         u64 att_hist, succ_hist;
  36
  37         /* current throughput */
  38         unsigned int cur_tp;
  39
  40         /* packet delivery probabilities */
  41         unsigned int cur_prob, probability;
  42
  43         /* maximum retry counts */
  44         unsigned int retry_count;
  45         unsigned int retry_count_rtscts;
  46
  47         bool retry_updated;
  48         u8 sample_skipped;
  49 };
  50
  51 struct minstrel_mcs_group_data {
  52         u8 index;
  53         u8 column;
  54
  55         /* bitfield of supported MCS rates of this group */
  56         u8 supported;
  57
  58         /* selected primary rates */
  59         unsigned int max_tp_rate;
  60         unsigned int max_tp_rate2;
  61         unsigned int max_prob_rate;
  62
  63         /* MCS rate statistics */
  64         struct minstrel_rate_stats rates[MCS_GROUP_RATES];
  65 };
  66
  67 struct minstrel_ht_sta {
  68         struct ieee80211_sta *sta;
  69
  70         /* ampdu length (average, per sampling interval) */
  71         unsigned int ampdu_len;
  72         unsigned int ampdu_packets;
  73
  74         /* ampdu length (EWMA) */
  75         unsigned int avg_ampdu_len;
  76
  77         /* best throughput rate */
  78         unsigned int max_tp_rate;
  79
  80         /* second best throughput rate */
  81         unsigned int max_tp_rate2;
  82
  83         /* best probability rate */
  84         unsigned int max_prob_rate;
  85         unsigned int max_prob_streams;
  86
  87         /* time of last status update */
  88         unsigned long stats_update;
  89
  90         /* overhead time in usec for each frame */
  91         unsigned int overhead;
  92         unsigned int overhead_rtscts;
  93
  94         unsigned int total_packets;
  95         unsigned int sample_packets;
  96
  97         /* tx flags to add for frames for this sta */
  98         u32 tx_flags;
  99
 100         u8 sample_wait;
 101         u8 sample_tries;
 102         u8 sample_count;
 103         u8 sample_slow;
 104
 105         /* current MCS group to be sampled */
 106         u8 sample_group;
 107
 108         u8 cck_supported;
 109         u8 cck_supported_short;
 110
 111         /* MCS rate group info and statistics */
 112         struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS + 1];
 113 };
 114
 115 struct minstrel_ht_sta_priv {
 116         union {
 117                 struct minstrel_ht_sta ht;
 118                 struct minstrel_sta_info legacy;
 119         };
 120 #ifdef CONFIG_MAC80211_DEBUGFS
 121         struct dentry *dbg_stats;
 122 #endif
 123         void *ratelist;
 124         void *sample_table;
 125         bool is_ht;
 126 };
 127
 128 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 129 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
 130
 131 #endif