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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b1c4f68337
Legacy-only devices are not very common and the overhead of the extra code for HT and VHT rates is not big enough to justify all those extra lines of code to make it optional. Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/*
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* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __RC_MINSTREL_H
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#define __RC_MINSTREL_H
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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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#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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/* number of highest throughput rates to consider*/
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#define MAX_THR_RATES 4
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/*
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* Perform EWMA (Exponentially Weighted Moving Average) calculation
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*/
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static inline int
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minstrel_ewma(int old, int new, int weight)
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{
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int diff, incr;
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diff = new - old;
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incr = (EWMA_DIV - weight) * diff / EWMA_DIV;
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return old + incr;
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}
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/*
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* Perform EWMV (Exponentially Weighted Moving Variance) calculation
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*/
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static inline int
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minstrel_ewmv(int old_ewmv, int cur_prob, int prob_ewma, int weight)
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{
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int diff, incr;
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diff = cur_prob - prob_ewma;
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incr = (EWMA_DIV - weight) * diff / EWMA_DIV;
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return weight * (old_ewmv + MINSTREL_TRUNC(diff * incr)) / EWMA_DIV;
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}
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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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/* statistis of packet delivery probability
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* prob_ewma - exponential weighted moving average of prob
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* prob_ewmsd - exp. weighted moving standard deviation of prob */
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u16 prob_ewma;
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u16 prob_ewmv;
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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_rate {
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int bitrate;
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s8 rix;
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u8 retry_count_cts;
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u8 adjusted_retry_count;
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unsigned int perfect_tx_time;
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unsigned int ack_time;
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int sample_limit;
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struct minstrel_rate_stats stats;
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};
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struct minstrel_sta_info {
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struct ieee80211_sta *sta;
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unsigned long last_stats_update;
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unsigned int sp_ack_dur;
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unsigned int rate_avg;
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unsigned int lowest_rix;
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u8 max_tp_rate[MAX_THR_RATES];
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u8 max_prob_rate;
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unsigned int total_packets;
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unsigned int sample_packets;
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int sample_deferred;
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unsigned int sample_row;
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unsigned int sample_column;
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int n_rates;
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struct minstrel_rate *r;
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bool prev_sample;
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/* sampling table */
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u8 *sample_table;
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};
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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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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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unsigned int lookaround_rate;
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unsigned int lookaround_rate_mrr;
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u8 cck_rates[4];
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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 minstrel_debugfs_info {
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size_t len;
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char buf[];
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};
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/* Get EWMSD (Exponentially Weighted Moving Standard Deviation) * 10 */
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static inline int
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minstrel_get_ewmsd10(struct minstrel_rate_stats *mrs)
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{
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unsigned int ewmv = mrs->prob_ewmv;
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return int_sqrt(MINSTREL_TRUNC(ewmv * 1000 * 1000));
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}
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extern const struct rate_control_ops mac80211_minstrel;
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void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
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/* Recalculate success probabilities and counters for a given rate using EWMA */
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void minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs);
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int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma);
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/* debugfs */
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int minstrel_stats_open(struct inode *inode, struct file *file);
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int minstrel_stats_csv_open(struct inode *inode, struct file *file);
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#endif
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