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