projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cccf129f FF |
1 | /* |
| 2 | * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> | |
| 3 | * | |
| 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. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef __RC_MINSTREL_H | |
| 10 | #define __RC_MINSTREL_H | |
| 11 | ||
| eea85999 KB |
12 | #define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */ |
| 13 | #define EWMA_DIV 128 | |
| f744bf81 TH |
14 | #define SAMPLE_COLUMNS 10 /* number of columns in sample table */ |
| 15 | ||
| a512d4b5 | 16 | |
| c8ca8c2f TH |
17 | /* scaled fraction values */ |
| 18 | #define MINSTREL_SCALE 16 | |
| 19 | #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) | |
| 20 | #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE) | |
| 21 | ||
| 2ff2b690 TH |
22 | /* number of highest throughput rates to consider*/ |
| 23 | #define MAX_THR_RATES 4 | |
| 24 | ||
| a512d4b5 TH |
25 | /* |
| 26 | * Perform EWMA (Exponentially Weighted Moving Average) calculation | |
| 27 | */ | |
| 28 | static inline int | |
| 29 | minstrel_ewma(int old, int new, int weight) | |
| 30 | { | |
| eea85999 | 31 | return (new * (EWMA_DIV - weight) + old * weight) / EWMA_DIV; |
| a512d4b5 TH |
32 | } |
| 33 | ||
| 34 | ||
| cccf129f FF |
35 | struct minstrel_rate { |
| 36 | int bitrate; | |
| 37 | int rix; | |
| 38 | ||
| 39 | unsigned int perfect_tx_time; | |
| 40 | unsigned int ack_time; | |
| 41 | ||
| f4a8cd94 | 42 | int sample_limit; |
| cccf129f FF |
43 | unsigned int retry_count; |
| 44 | unsigned int retry_count_cts; | |
| 45 | unsigned int retry_count_rtscts; | |
| 46 | unsigned int adjusted_retry_count; | |
| 47 | ||
| 48 | u32 success; | |
| 49 | u32 attempts; | |
| 50 | u32 last_attempts; | |
| 51 | u32 last_success; | |
| 1e9c27df | 52 | u8 sample_skipped; |
| cccf129f FF |
53 | |
| 54 | /* parts per thousand */ | |
| 55 | u32 cur_prob; | |
| 56 | u32 probability; | |
| 57 | ||
| 58 | /* per-rate throughput */ | |
| 59 | u32 cur_tp; | |
| cccf129f FF |
60 | |
| 61 | u64 succ_hist; | |
| 62 | u64 att_hist; | |
| 63 | }; | |
| 64 | ||
| 65 | struct minstrel_sta_info { | |
| 66 | unsigned long stats_update; | |
| 67 | unsigned int sp_ack_dur; | |
| 68 | unsigned int rate_avg; | |
| 69 | ||
| 70 | unsigned int lowest_rix; | |
| 71 | ||
| 2ff2b690 TH |
72 | u8 max_tp_rate[MAX_THR_RATES]; |
| 73 | u8 max_prob_rate; | |
| cccf129f FF |
74 | unsigned int packet_count; |
| 75 | unsigned int sample_count; | |
| 76 | int sample_deferred; | |
| 77 | ||
| 8f157611 | 78 | unsigned int sample_row; |
| cccf129f FF |
79 | unsigned int sample_column; |
| 80 | ||
| 81 | int n_rates; | |
| 82 | struct minstrel_rate *r; | |
| f4a8cd94 | 83 | bool prev_sample; |
| cccf129f FF |
84 | |
| 85 | /* sampling table */ | |
| 86 | u8 *sample_table; | |
| 87 | ||
| 88 | #ifdef CONFIG_MAC80211_DEBUGFS | |
| 89 | struct dentry *dbg_stats; | |
| 90 | #endif | |
| 91 | }; | |
| 92 | ||
| 93 | struct minstrel_priv { | |
| 94 | struct ieee80211_hw *hw; | |
| 95 | bool has_mrr; | |
| 96 | unsigned int cw_min; | |
| 97 | unsigned int cw_max; | |
| 98 | unsigned int max_retry; | |
| cccf129f FF |
99 | unsigned int segment_size; |
| 100 | unsigned int update_interval; | |
| 101 | unsigned int lookaround_rate; | |
| 102 | unsigned int lookaround_rate_mrr; | |
| 24f7580e | 103 | |
| a0497f9f FF |
104 | u8 cck_rates[4]; |
| 105 | ||
| 24f7580e ZK |
106 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 107 | /* | |
| 108 | * enable fixed rate processing per RC | |
| 109 | * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx | |
| 110 | * - write -1 to enable RC processing again | |
| 111 | * - setting will be applied on next update | |
| 112 | */ | |
| 113 | u32 fixed_rate_idx; | |
| 114 | struct dentry *dbg_fixed_rate; | |
| 115 | #endif | |
| 116 | ||
| cccf129f FF |
117 | }; |
| 118 | ||
| 44ac91ea FF |
119 | struct minstrel_debugfs_info { |
| 120 | size_t len; | |
| 121 | char buf[]; | |
| 122 | }; | |
| 123 | ||
| eae44756 | 124 | extern struct rate_control_ops mac80211_minstrel; |
| cccf129f FF |
125 | void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); |
| 126 | void minstrel_remove_sta_debugfs(void *priv, void *priv_sta); | |
| 127 | ||
| eae44756 FF |
128 | /* debugfs */ |
| 129 | int minstrel_stats_open(struct inode *inode, struct file *file); | |
| 130 | ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos); | |
| 131 | int minstrel_stats_release(struct inode *inode, struct file *file); | |
| 132 | ||
| cccf129f | 133 | #endif |