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;
47 /* parts per thousand */
51 /* per-rate throughput */
58 struct minstrel_sta_info {
59 unsigned long stats_update;
60 unsigned int sp_ack_dur;
61 unsigned int rate_avg;
63 unsigned int lowest_rix;
65 unsigned int max_tp_rate;
66 unsigned int max_tp_rate2;
67 unsigned int max_prob_rate;
68 unsigned int packet_count;
69 unsigned int sample_count;
72 unsigned int sample_idx;
73 unsigned int sample_column;
76 struct minstrel_rate *r;
82 #ifdef CONFIG_MAC80211_DEBUGFS
83 struct dentry *dbg_stats;
87 struct minstrel_priv {
88 struct ieee80211_hw *hw;
92 unsigned int max_retry;
93 unsigned int segment_size;
94 unsigned int update_interval;
95 unsigned int lookaround_rate;
96 unsigned int lookaround_rate_mrr;
100 #ifdef CONFIG_MAC80211_DEBUGFS
102 * enable fixed rate processing per RC
103 * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
104 * - write -1 to enable RC processing again
105 * - setting will be applied on next update
108 struct dentry *dbg_fixed_rate;
113 struct minstrel_debugfs_info {
118 extern struct rate_control_ops mac80211_minstrel;
119 void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
120 void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
123 int minstrel_stats_open(struct inode *inode, struct file *file);
124 ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
125 int minstrel_stats_release(struct inode *inode, struct file *file);