net/mac80211/rc80211_minstrel_ht.h

   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         u8 bw;
  37         u16 duration[MCS_GROUP_RATES];
  38 };
  39
  40 extern const struct mcs_group minstrel_mcs_groups[];
  41
  42 struct minstrel_mcs_group_data {
  43         u8 index;
  44         u8 column;
  45
  46         /* sorted rate set within a MCS group*/
  47         u16 max_group_tp_rate[MAX_THR_RATES];
  48         u16 max_group_prob_rate;
  49
  50         /* MCS rate statistics */
  51         struct minstrel_rate_stats rates[MCS_GROUP_RATES];
  52 };
  53
  54 enum minstrel_sample_mode {
  55         MINSTREL_SAMPLE_IDLE,
  56         MINSTREL_SAMPLE_ACTIVE,
  57         MINSTREL_SAMPLE_PENDING,
  58 };
  59
  60 struct minstrel_ht_sta {
  61         struct ieee80211_sta *sta;
  62
  63         /* ampdu length (average, per sampling interval) */
  64         unsigned int ampdu_len;
  65         unsigned int ampdu_packets;
  66
  67         /* ampdu length (EWMA) */
  68         unsigned int avg_ampdu_len;
  69
  70         /* overall sorted rate set */
  71         u16 max_tp_rate[MAX_THR_RATES];
  72         u16 max_prob_rate;
  73
  74         /* time of last status update */
  75         unsigned long last_stats_update;
  76
  77         /* overhead time in usec for each frame */
  78         unsigned int overhead;
  79         unsigned int overhead_rtscts;
  80
  81         unsigned int total_packets_last;
  82         unsigned int total_packets_cur;
  83         unsigned int total_packets;
  84         unsigned int sample_packets;
  85
  86         /* tx flags to add for frames for this sta */
  87         u32 tx_flags;
  88
  89         u8 sample_wait;
  90         u8 sample_tries;
  91         u8 sample_count;
  92         u8 sample_slow;
  93
  94         enum minstrel_sample_mode sample_mode;
  95         u16 sample_rate;
  96
  97         /* current MCS group to be sampled */
  98         u8 sample_group;
  99
 100         u8 cck_supported;
 101         u8 cck_supported_short;
 102
 103         /* Bitfield of supported MCS rates of all groups */
 104         u16 supported[MINSTREL_GROUPS_NB];
 105
 106         /* MCS rate group info and statistics */
 107         struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
 108 };
 109
 110 struct minstrel_ht_sta_priv {
 111         union {
 112                 struct minstrel_ht_sta ht;
 113                 struct minstrel_sta_info legacy;
 114         };
 115         void *ratelist;
 116         void *sample_table;
 117         bool is_ht;
 118 };
 119
 120 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 121 int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
 122                            int prob_avg);
 123
 124 #endif