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TOMOYO Linux Cross Reference
Linux/net/mac80211/rc80211_minstrel_ht.h

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  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
128 

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