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_HT_STREAM_GROUPS       4 /* BW(=2) * SGI(=2) */
  18 #ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
  19 #define MINSTREL_VHT_STREAM_GROUPS      6 /* BW(=3) * SGI(=2) */
  20 #else
  21 #define MINSTREL_VHT_STREAM_GROUPS      0
  22 #endif
  23
  24 #define MINSTREL_HT_GROUPS_NB   (MINSTREL_MAX_STREAMS *         \
  25                                  MINSTREL_HT_STREAM_GROUPS)
  26 #define MINSTREL_VHT_GROUPS_NB  (MINSTREL_MAX_STREAMS *         \
  27                                  MINSTREL_VHT_STREAM_GROUPS)
  28 #define MINSTREL_CCK_GROUPS_NB  1
  29 #define MINSTREL_GROUPS_NB      (MINSTREL_HT_GROUPS_NB +        \
  30                                  MINSTREL_VHT_GROUPS_NB +       \
  31                                  MINSTREL_CCK_GROUPS_NB)
  32
  33 #define MINSTREL_HT_GROUP_0     0
  34 #define MINSTREL_CCK_GROUP      (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
  35 #define MINSTREL_VHT_GROUP_0    (MINSTREL_CCK_GROUP + 1)
  36
  37 #ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
  38 #define MCS_GROUP_RATES         10
  39 #else
  40 #define MCS_GROUP_RATES         8
  41 #endif
  42
  43 struct mcs_group {
  44         u32 flags;
  45         unsigned int streams;
  46         unsigned int duration[MCS_GROUP_RATES];
  47 };
  48
  49 extern const struct mcs_group minstrel_mcs_groups[];
  50
  51 struct minstrel_mcs_group_data {
  52         u8 index;
  53         u8 column;
  54
  55         /* bitfield of supported MCS rates of this group */
  56         u16 supported;
  57
  58         /* sorted rate set within a MCS group*/
  59         u16 max_group_tp_rate[MAX_THR_RATES];
  60         u16 max_group_prob_rate;
  61
  62         /* MCS rate statistics */
  63         struct minstrel_rate_stats rates[MCS_GROUP_RATES];
  64 };
  65
  66 struct minstrel_ht_sta {
  67         struct ieee80211_sta *sta;
  68
  69         /* ampdu length (average, per sampling interval) */
  70         unsigned int ampdu_len;
  71         unsigned int ampdu_packets;
  72
  73         /* ampdu length (EWMA) */
  74         unsigned int avg_ampdu_len;
  75
  76         /* overall sorted rate set */
  77         u16 max_tp_rate[MAX_THR_RATES];
  78         u16 max_prob_rate;
  79
  80         /* time of last status update */
  81         unsigned long last_stats_update;
  82
  83         /* overhead time in usec for each frame */
  84         unsigned int overhead;
  85         unsigned int overhead_rtscts;
  86
  87         unsigned int total_packets;
  88         unsigned int sample_packets;
  89
  90         /* tx flags to add for frames for this sta */
  91         u32 tx_flags;
  92
  93         u8 sample_wait;
  94         u8 sample_tries;
  95         u8 sample_count;
  96         u8 sample_slow;
  97
  98         /* current MCS group to be sampled */
  99         u8 sample_group;
 100
 101         u8 cck_supported;
 102         u8 cck_supported_short;
 103
 104         /* MCS rate group info and statistics */
 105         struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
 106 };
 107
 108 struct minstrel_ht_sta_priv {
 109         union {
 110                 struct minstrel_ht_sta ht;
 111                 struct minstrel_sta_info legacy;
 112         };
 113 #ifdef CONFIG_MAC80211_DEBUGFS
 114         struct dentry *dbg_stats;
 115         struct dentry *dbg_stats_csv;
 116 #endif
 117         void *ratelist;
 118         void *sample_table;
 119         bool is_ht;
 120 };
 121
 122 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 123 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
 124 int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
 125                            int prob_ewma);
 126
 127 #endif