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_mcs_group_data {
  30         u8 index;
  31         u8 column;
  32
  33         /* bitfield of supported MCS rates of this group */
  34         u8 supported;
  35
  36         /* selected primary rates */
  37         unsigned int max_tp_rate;
  38         unsigned int max_tp_rate2;
  39         unsigned int max_prob_rate;
  40
  41         /* MCS rate statistics */
  42         struct minstrel_rate_stats rates[MCS_GROUP_RATES];
  43 };
  44
  45 struct minstrel_ht_sta {
  46         struct ieee80211_sta *sta;
  47
  48         /* ampdu length (average, per sampling interval) */
  49         unsigned int ampdu_len;
  50         unsigned int ampdu_packets;
  51
  52         /* ampdu length (EWMA) */
  53         unsigned int avg_ampdu_len;
  54
  55         /* best throughput rate */
  56         unsigned int max_tp_rate;
  57
  58         /* second best throughput rate */
  59         unsigned int max_tp_rate2;
  60
  61         /* best probability rate */
  62         unsigned int max_prob_rate;
  63         unsigned int max_prob_streams;
  64
  65         /* time of last status update */
  66         unsigned long stats_update;
  67
  68         /* overhead time in usec for each frame */
  69         unsigned int overhead;
  70         unsigned int overhead_rtscts;
  71
  72         unsigned int total_packets;
  73         unsigned int sample_packets;
  74
  75         /* tx flags to add for frames for this sta */
  76         u32 tx_flags;
  77
  78         u8 sample_wait;
  79         u8 sample_tries;
  80         u8 sample_count;
  81         u8 sample_slow;
  82
  83         /* current MCS group to be sampled */
  84         u8 sample_group;
  85
  86         u8 cck_supported;
  87         u8 cck_supported_short;
  88
  89         /* MCS rate group info and statistics */
  90         struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS + 1];
  91 };
  92
  93 struct minstrel_ht_sta_priv {
  94         union {
  95                 struct minstrel_ht_sta ht;
  96                 struct minstrel_sta_info legacy;
  97         };
  98 #ifdef CONFIG_MAC80211_DEBUGFS
  99         struct dentry *dbg_stats;
 100 #endif
 101         void *ratelist;
 102         void *sample_table;
 103         bool is_ht;
 104 };
 105
 106 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 107 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
 108
 109 #endif