2 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef __RC_MINSTREL_H
10 #define __RC_MINSTREL_H
12 #define EWMA_LEVEL 75 /* ewma weighting factor [%] */
14 /* scaled fraction values */
15 #define MINSTREL_SCALE 16
16 #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
17 #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
20 * Perform EWMA (Exponentially Weighted Moving Average) calculation
23 minstrel_ewma(int old, int new, int weight)
25 return (new * (100 - weight) + old * weight) / 100;
29 struct minstrel_rate {
33 unsigned int perfect_tx_time;
34 unsigned int ack_time;
37 unsigned int retry_count;
38 unsigned int retry_count_cts;
39 unsigned int retry_count_rtscts;
40 unsigned int adjusted_retry_count;
48 /* parts per thousand */
52 /* per-rate throughput */
59 struct minstrel_sta_info {
60 unsigned long stats_update;
61 unsigned int sp_ack_dur;
62 unsigned int rate_avg;
64 unsigned int lowest_rix;
66 unsigned int max_tp_rate;
67 unsigned int max_tp_rate2;
68 unsigned int max_prob_rate;
69 unsigned int packet_count;
70 unsigned int sample_count;
73 unsigned int sample_row;
74 unsigned int sample_column;
77 struct minstrel_rate *r;
83 #ifdef CONFIG_MAC80211_DEBUGFS
84 struct dentry *dbg_stats;
88 struct minstrel_priv {
89 struct ieee80211_hw *hw;
93 unsigned int max_retry;
94 unsigned int segment_size;
95 unsigned int update_interval;
96 unsigned int lookaround_rate;
97 unsigned int lookaround_rate_mrr;
101 #ifdef CONFIG_MAC80211_DEBUGFS
103 * enable fixed rate processing per RC
104 * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
105 * - write -1 to enable RC processing again
106 * - setting will be applied on next update
109 struct dentry *dbg_fixed_rate;
114 struct minstrel_debugfs_info {
119 extern struct rate_control_ops mac80211_minstrel;
120 void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
121 void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
124 int minstrel_stats_open(struct inode *inode, struct file *file);
125 ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
126 int minstrel_stats_release(struct inode *inode, struct file *file);