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Linux/net/mac80211/rc80211_minstrel_ht.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
  4  */
  5 
  6 #ifndef __RC_MINSTREL_HT_H
  7 #define __RC_MINSTREL_HT_H
  8 
  9 /*
 10  * The number of streams can be changed to 2 to reduce code
 11  * size and memory footprint.
 12  */
 13 #define MINSTREL_MAX_STREAMS            4
 14 #define MINSTREL_HT_STREAM_GROUPS       4 /* BW(=2) * SGI(=2) */
 15 #define MINSTREL_VHT_STREAM_GROUPS      6 /* BW(=3) * SGI(=2) */
 16 
 17 #define MINSTREL_HT_GROUPS_NB   (MINSTREL_MAX_STREAMS *         \
 18                                  MINSTREL_HT_STREAM_GROUPS)
 19 #define MINSTREL_VHT_GROUPS_NB  (MINSTREL_MAX_STREAMS *         \
 20                                  MINSTREL_VHT_STREAM_GROUPS)
 21 #define MINSTREL_CCK_GROUPS_NB  1
 22 #define MINSTREL_GROUPS_NB      (MINSTREL_HT_GROUPS_NB +        \
 23                                  MINSTREL_VHT_GROUPS_NB +       \
 24                                  MINSTREL_CCK_GROUPS_NB)
 25 
 26 #define MINSTREL_HT_GROUP_0     0
 27 #define MINSTREL_CCK_GROUP      (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
 28 #define MINSTREL_VHT_GROUP_0    (MINSTREL_CCK_GROUP + 1)
 29 
 30 #define MCS_GROUP_RATES         10
 31 
 32 struct mcs_group {
 33         u16 flags;
 34         u8 streams;
 35         u8 shift;
 36         u16 duration[MCS_GROUP_RATES];
 37 };
 38 
 39 extern const struct mcs_group minstrel_mcs_groups[];
 40 
 41 struct minstrel_mcs_group_data {
 42         u8 index;
 43         u8 column;
 44 
 45         /* sorted rate set within a MCS group*/
 46         u16 max_group_tp_rate[MAX_THR_RATES];
 47         u16 max_group_prob_rate;
 48 
 49         /* MCS rate statistics */
 50         struct minstrel_rate_stats rates[MCS_GROUP_RATES];
 51 };
 52 
 53 struct minstrel_ht_sta {
 54         struct ieee80211_sta *sta;
 55 
 56         /* ampdu length (average, per sampling interval) */
 57         unsigned int ampdu_len;
 58         unsigned int ampdu_packets;
 59 
 60         /* ampdu length (EWMA) */
 61         unsigned int avg_ampdu_len;
 62 
 63         /* overall sorted rate set */
 64         u16 max_tp_rate[MAX_THR_RATES];
 65         u16 max_prob_rate;
 66 
 67         /* time of last status update */
 68         unsigned long last_stats_update;
 69 
 70         /* overhead time in usec for each frame */
 71         unsigned int overhead;
 72         unsigned int overhead_rtscts;
 73 
 74         unsigned int total_packets;
 75         unsigned int sample_packets;
 76 
 77         /* tx flags to add for frames for this sta */
 78         u32 tx_flags;
 79 
 80         u8 sample_wait;
 81         u8 sample_tries;
 82         u8 sample_count;
 83         u8 sample_slow;
 84 
 85         /* current MCS group to be sampled */
 86         u8 sample_group;
 87 
 88         u8 cck_supported;
 89         u8 cck_supported_short;
 90 
 91         /* Bitfield of supported MCS rates of all groups */
 92         u16 supported[MINSTREL_GROUPS_NB];
 93 
 94         /* MCS rate group info and statistics */
 95         struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
 96 };
 97 
 98 struct minstrel_ht_sta_priv {
 99         union {
100                 struct minstrel_ht_sta ht;
101                 struct minstrel_sta_info legacy;
102         };
103         void *ratelist;
104         void *sample_table;
105         bool is_ht;
106 };
107 
108 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
109 int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
110                            int prob_ewma);
111 
112 #endif
113 

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