LXR linux/net/mac80211/rc80211_minstrel

   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
  43struct mcs_group {
  44        u32 flags;
  45        unsigned int streams;
  46        unsigned int duration[MCS_GROUP_RATES];
  47};
  48
  49extern const struct mcs_group minstrel_mcs_groups[];
  50
  51struct minstrel_mcs_group_data {
  52        u8 index;
  53        u8 column;
  54
  55        /* sorted rate set within a MCS group*/
  56        u16 max_group_tp_rate[MAX_THR_RATES];
  57        u16 max_group_prob_rate;
  58
  59        /* MCS rate statistics */
  60        struct minstrel_rate_stats rates[MCS_GROUP_RATES];
  61};
  62
  63struct minstrel_ht_sta {
  64        struct ieee80211_sta *sta;
  65
  66        /* ampdu length (average, per sampling interval) */
  67        unsigned int ampdu_len;
  68        unsigned int ampdu_packets;
  69
  70        /* ampdu length (EWMA) */
  71        unsigned int avg_ampdu_len;
  72
  73        /* overall sorted rate set */
  74        u16 max_tp_rate[MAX_THR_RATES];
  75        u16 max_prob_rate;
  76
  77        /* time of last status update */
  78        unsigned long last_stats_update;
  79
  80        /* overhead time in usec for each frame */
  81        unsigned int overhead;
  82        unsigned int overhead_rtscts;
  83
  84        unsigned int total_packets;
  85        unsigned int sample_packets;
  86
  87        /* tx flags to add for frames for this sta */
  88        u32 tx_flags;
  89
  90        u8 sample_wait;
  91        u8 sample_tries;
  92        u8 sample_count;
  93        u8 sample_slow;
  94
  95        /* current MCS group to be sampled */
  96        u8 sample_group;
  97
  98        u8 cck_supported;
  99        u8 cck_supported_short;
 100
 101        /* Bitfield of supported MCS rates of all groups */
 102        u16 supported[MINSTREL_GROUPS_NB];
 103
 104        /* MCS rate group info and statistics */
 105        struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
 106};
 107
 108struct 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
 122void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 123void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
 124int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
 125                           int prob_ewma);
 126
 127#endif
 128