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