204 lines
5.0 KiB
C
204 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
|
|
*/
|
|
|
|
#ifndef __RC_MINSTREL_HT_H
|
|
#define __RC_MINSTREL_HT_H
|
|
|
|
#include <linux/bitfield.h>
|
|
|
|
/* number of highest throughput rates to consider*/
|
|
#define MAX_THR_RATES 4
|
|
#define SAMPLE_COLUMNS 10 /* number of columns in sample table */
|
|
|
|
/* scaled fraction values */
|
|
#define MINSTREL_SCALE 12
|
|
#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
|
|
#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
|
|
|
|
#define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */
|
|
#define EWMA_DIV 128
|
|
|
|
/*
|
|
* Coefficients for moving average with noise filter (period=16),
|
|
* scaled by 10 bits
|
|
*
|
|
* a1 = exp(-pi * sqrt(2) / period)
|
|
* coeff2 = 2 * a1 * cos(sqrt(2) * 2 * pi / period)
|
|
* coeff3 = -sqr(a1)
|
|
* coeff1 = 1 - coeff2 - coeff3
|
|
*/
|
|
#define MINSTREL_AVG_COEFF1 (MINSTREL_FRAC(1, 1) - \
|
|
MINSTREL_AVG_COEFF2 - \
|
|
MINSTREL_AVG_COEFF3)
|
|
#define MINSTREL_AVG_COEFF2 0x00001499
|
|
#define MINSTREL_AVG_COEFF3 -0x0000092e
|
|
|
|
/*
|
|
* The number of streams can be changed to 2 to reduce code
|
|
* size and memory footprint.
|
|
*/
|
|
#define MINSTREL_MAX_STREAMS 4
|
|
#define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
|
|
#define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */
|
|
|
|
#define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
|
|
MINSTREL_HT_STREAM_GROUPS)
|
|
#define MINSTREL_VHT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
|
|
MINSTREL_VHT_STREAM_GROUPS)
|
|
#define MINSTREL_LEGACY_GROUPS_NB 2
|
|
#define MINSTREL_GROUPS_NB (MINSTREL_HT_GROUPS_NB + \
|
|
MINSTREL_VHT_GROUPS_NB + \
|
|
MINSTREL_LEGACY_GROUPS_NB)
|
|
|
|
#define MINSTREL_HT_GROUP_0 0
|
|
#define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
|
|
#define MINSTREL_OFDM_GROUP (MINSTREL_CCK_GROUP + 1)
|
|
#define MINSTREL_VHT_GROUP_0 (MINSTREL_OFDM_GROUP + 1)
|
|
|
|
#define MCS_GROUP_RATES 10
|
|
|
|
#define MI_RATE_IDX_MASK GENMASK(3, 0)
|
|
#define MI_RATE_GROUP_MASK GENMASK(15, 4)
|
|
|
|
#define MI_RATE(_group, _idx) \
|
|
(FIELD_PREP(MI_RATE_GROUP_MASK, _group) | \
|
|
FIELD_PREP(MI_RATE_IDX_MASK, _idx))
|
|
|
|
#define MI_RATE_IDX(_rate) FIELD_GET(MI_RATE_IDX_MASK, _rate)
|
|
#define MI_RATE_GROUP(_rate) FIELD_GET(MI_RATE_GROUP_MASK, _rate)
|
|
|
|
#define MINSTREL_SAMPLE_RATES 5 /* rates per sample type */
|
|
#define MINSTREL_SAMPLE_INTERVAL (HZ / 50)
|
|
|
|
struct minstrel_priv {
|
|
struct ieee80211_hw *hw;
|
|
bool has_mrr;
|
|
unsigned int cw_min;
|
|
unsigned int cw_max;
|
|
unsigned int max_retry;
|
|
unsigned int segment_size;
|
|
unsigned int update_interval;
|
|
|
|
u8 cck_rates[4];
|
|
u8 ofdm_rates[NUM_NL80211_BANDS][8];
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
/*
|
|
* enable fixed rate processing per RC
|
|
* - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
|
|
* - write -1 to enable RC processing again
|
|
* - setting will be applied on next update
|
|
*/
|
|
u32 fixed_rate_idx;
|
|
#endif
|
|
};
|
|
|
|
|
|
struct mcs_group {
|
|
u16 flags;
|
|
u8 streams;
|
|
u8 shift;
|
|
u8 bw;
|
|
u16 duration[MCS_GROUP_RATES];
|
|
};
|
|
|
|
extern const s16 minstrel_cck_bitrates[4];
|
|
extern const s16 minstrel_ofdm_bitrates[8];
|
|
extern const struct mcs_group minstrel_mcs_groups[];
|
|
|
|
struct minstrel_rate_stats {
|
|
/* current / last sampling period attempts/success counters */
|
|
u16 attempts, last_attempts;
|
|
u16 success, last_success;
|
|
|
|
/* total attempts/success counters */
|
|
u32 att_hist, succ_hist;
|
|
|
|
/* prob_avg - moving average of prob */
|
|
u16 prob_avg;
|
|
u16 prob_avg_1;
|
|
|
|
/* maximum retry counts */
|
|
u8 retry_count;
|
|
u8 retry_count_rtscts;
|
|
|
|
bool retry_updated;
|
|
};
|
|
|
|
enum minstrel_sample_type {
|
|
MINSTREL_SAMPLE_TYPE_INC,
|
|
MINSTREL_SAMPLE_TYPE_JUMP,
|
|
MINSTREL_SAMPLE_TYPE_SLOW,
|
|
__MINSTREL_SAMPLE_TYPE_MAX
|
|
};
|
|
|
|
struct minstrel_mcs_group_data {
|
|
u8 index;
|
|
u8 column;
|
|
|
|
/* sorted rate set within a MCS group*/
|
|
u16 max_group_tp_rate[MAX_THR_RATES];
|
|
u16 max_group_prob_rate;
|
|
|
|
/* MCS rate statistics */
|
|
struct minstrel_rate_stats rates[MCS_GROUP_RATES];
|
|
};
|
|
|
|
struct minstrel_sample_category {
|
|
u8 sample_group;
|
|
u16 sample_rates[MINSTREL_SAMPLE_RATES];
|
|
u16 cur_sample_rates[MINSTREL_SAMPLE_RATES];
|
|
};
|
|
|
|
struct minstrel_ht_sta {
|
|
struct ieee80211_sta *sta;
|
|
|
|
/* ampdu length (average, per sampling interval) */
|
|
unsigned int ampdu_len;
|
|
unsigned int ampdu_packets;
|
|
|
|
/* ampdu length (EWMA) */
|
|
unsigned int avg_ampdu_len;
|
|
|
|
/* overall sorted rate set */
|
|
u16 max_tp_rate[MAX_THR_RATES];
|
|
u16 max_prob_rate;
|
|
|
|
/* time of last status update */
|
|
unsigned long last_stats_update;
|
|
|
|
/* overhead time in usec for each frame */
|
|
unsigned int overhead;
|
|
unsigned int overhead_rtscts;
|
|
unsigned int overhead_legacy;
|
|
unsigned int overhead_legacy_rtscts;
|
|
|
|
unsigned int total_packets;
|
|
unsigned int sample_packets;
|
|
|
|
/* tx flags to add for frames for this sta */
|
|
u32 tx_flags;
|
|
|
|
u8 band;
|
|
|
|
u8 sample_seq;
|
|
u16 sample_rate;
|
|
|
|
unsigned long sample_time;
|
|
struct minstrel_sample_category sample[__MINSTREL_SAMPLE_TYPE_MAX];
|
|
|
|
/* Bitfield of supported MCS rates of all groups */
|
|
u16 supported[MINSTREL_GROUPS_NB];
|
|
|
|
/* MCS rate group info and statistics */
|
|
struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
|
|
};
|
|
|
|
void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
|
|
int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
|
|
int prob_avg);
|
|
|
|
#endif
|