forked from Minki/linux
eeafcb0c80
The new noise filter has been the default for a while now with no reported downside and significant improvement compared to the old code. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20210115120242.89616-5-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
191 lines
4.6 KiB
C
191 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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*/
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#ifndef __RC_MINSTREL_HT_H
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#define __RC_MINSTREL_HT_H
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/* number of highest throughput rates to consider*/
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#define MAX_THR_RATES 4
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#define SAMPLE_COLUMNS 10 /* number of columns in sample table */
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/* scaled fraction values */
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#define MINSTREL_SCALE 12
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#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
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#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
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#define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */
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#define EWMA_DIV 128
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/*
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* Coefficients for moving average with noise filter (period=16),
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* scaled by 10 bits
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*
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* a1 = exp(-pi * sqrt(2) / period)
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* coeff2 = 2 * a1 * cos(sqrt(2) * 2 * pi / period)
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* coeff3 = -sqr(a1)
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* coeff1 = 1 - coeff2 - coeff3
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*/
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#define MINSTREL_AVG_COEFF1 (MINSTREL_FRAC(1, 1) - \
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MINSTREL_AVG_COEFF2 - \
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MINSTREL_AVG_COEFF3)
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#define MINSTREL_AVG_COEFF2 0x00001499
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#define MINSTREL_AVG_COEFF3 -0x0000092e
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/*
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* The number of streams can be changed to 2 to reduce code
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* size and memory footprint.
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*/
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#define MINSTREL_MAX_STREAMS 4
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#define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
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#define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */
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#define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
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MINSTREL_HT_STREAM_GROUPS)
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#define MINSTREL_VHT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
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MINSTREL_VHT_STREAM_GROUPS)
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#define MINSTREL_LEGACY_GROUPS_NB 2
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#define MINSTREL_GROUPS_NB (MINSTREL_HT_GROUPS_NB + \
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MINSTREL_VHT_GROUPS_NB + \
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MINSTREL_LEGACY_GROUPS_NB)
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#define MINSTREL_HT_GROUP_0 0
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#define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
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#define MINSTREL_OFDM_GROUP (MINSTREL_CCK_GROUP + 1)
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#define MINSTREL_VHT_GROUP_0 (MINSTREL_OFDM_GROUP + 1)
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#define MCS_GROUP_RATES 10
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struct minstrel_priv {
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struct ieee80211_hw *hw;
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bool has_mrr;
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u32 sample_switch;
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unsigned int cw_min;
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unsigned int cw_max;
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unsigned int max_retry;
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unsigned int segment_size;
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unsigned int update_interval;
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u8 cck_rates[4];
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u8 ofdm_rates[NUM_NL80211_BANDS][8];
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#ifdef CONFIG_MAC80211_DEBUGFS
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/*
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* enable fixed rate processing per RC
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* - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
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* - write -1 to enable RC processing again
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* - setting will be applied on next update
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*/
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u32 fixed_rate_idx;
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#endif
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};
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struct mcs_group {
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u16 flags;
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u8 streams;
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u8 shift;
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u8 bw;
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u16 duration[MCS_GROUP_RATES];
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};
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extern const s16 minstrel_cck_bitrates[4];
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extern const s16 minstrel_ofdm_bitrates[8];
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extern const struct mcs_group minstrel_mcs_groups[];
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struct minstrel_rate_stats {
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/* current / last sampling period attempts/success counters */
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u16 attempts, last_attempts;
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u16 success, last_success;
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/* total attempts/success counters */
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u32 att_hist, succ_hist;
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/* prob_avg - moving average of prob */
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u16 prob_avg;
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u16 prob_avg_1;
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/* maximum retry counts */
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u8 retry_count;
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u8 retry_count_rtscts;
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u8 sample_skipped;
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bool retry_updated;
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};
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struct minstrel_mcs_group_data {
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u8 index;
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u8 column;
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/* sorted rate set within a MCS group*/
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u16 max_group_tp_rate[MAX_THR_RATES];
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u16 max_group_prob_rate;
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/* MCS rate statistics */
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struct minstrel_rate_stats rates[MCS_GROUP_RATES];
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};
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enum minstrel_sample_mode {
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MINSTREL_SAMPLE_IDLE,
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MINSTREL_SAMPLE_ACTIVE,
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MINSTREL_SAMPLE_PENDING,
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};
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struct minstrel_ht_sta {
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struct ieee80211_sta *sta;
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/* ampdu length (average, per sampling interval) */
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unsigned int ampdu_len;
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unsigned int ampdu_packets;
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/* ampdu length (EWMA) */
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unsigned int avg_ampdu_len;
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/* overall sorted rate set */
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u16 max_tp_rate[MAX_THR_RATES];
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u16 max_prob_rate;
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/* time of last status update */
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unsigned long last_stats_update;
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/* overhead time in usec for each frame */
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unsigned int overhead;
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unsigned int overhead_rtscts;
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unsigned int overhead_legacy;
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unsigned int overhead_legacy_rtscts;
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unsigned int total_packets_last;
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unsigned int total_packets_cur;
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unsigned int total_packets;
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unsigned int sample_packets;
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/* tx flags to add for frames for this sta */
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u32 tx_flags;
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u8 sample_wait;
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u8 sample_tries;
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u8 sample_count;
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u8 sample_slow;
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enum minstrel_sample_mode sample_mode;
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u16 sample_rate;
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/* current MCS group to be sampled */
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u8 sample_group;
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u8 band;
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/* Bitfield of supported MCS rates of all groups */
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u16 supported[MINSTREL_GROUPS_NB];
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/* MCS rate group info and statistics */
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struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
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};
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void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
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int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
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int prob_avg);
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#endif
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