Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 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 | |
Thomas Huehn | f744bf8 | 2013-03-04 23:30:05 +0100 | [diff] [blame] | 12 | #define EWMA_LEVEL 75 /* ewma weighting factor [%] */ |
| 13 | #define SAMPLE_COLUMNS 10 /* number of columns in sample table */ |
| 14 | |
Thomas Huehn | a512d4b | 2013-03-04 23:30:01 +0100 | [diff] [blame] | 15 | |
Thomas Huehn | c8ca8c2 | 2013-03-04 23:30:02 +0100 | [diff] [blame] | 16 | /* scaled fraction values */ |
| 17 | #define MINSTREL_SCALE 16 |
| 18 | #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) |
| 19 | #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE) |
| 20 | |
Thomas Huehn | a512d4b | 2013-03-04 23:30:01 +0100 | [diff] [blame] | 21 | /* |
| 22 | * Perform EWMA (Exponentially Weighted Moving Average) calculation |
| 23 | */ |
| 24 | static inline int |
| 25 | minstrel_ewma(int old, int new, int weight) |
| 26 | { |
| 27 | return (new * (100 - weight) + old * weight) / 100; |
| 28 | } |
| 29 | |
| 30 | |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 31 | struct minstrel_rate { |
| 32 | int bitrate; |
| 33 | int rix; |
| 34 | |
| 35 | unsigned int perfect_tx_time; |
| 36 | unsigned int ack_time; |
| 37 | |
Felix Fietkau | f4a8cd9 | 2008-10-15 19:13:59 +0200 | [diff] [blame] | 38 | int sample_limit; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 39 | unsigned int retry_count; |
| 40 | unsigned int retry_count_cts; |
| 41 | unsigned int retry_count_rtscts; |
| 42 | unsigned int adjusted_retry_count; |
| 43 | |
| 44 | u32 success; |
| 45 | u32 attempts; |
| 46 | u32 last_attempts; |
| 47 | u32 last_success; |
Thomas Huehn | 1e9c27d | 2013-03-04 23:30:04 +0100 | [diff] [blame] | 48 | u8 sample_skipped; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 49 | |
| 50 | /* parts per thousand */ |
| 51 | u32 cur_prob; |
| 52 | u32 probability; |
| 53 | |
| 54 | /* per-rate throughput */ |
| 55 | u32 cur_tp; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 56 | |
| 57 | u64 succ_hist; |
| 58 | u64 att_hist; |
| 59 | }; |
| 60 | |
| 61 | struct minstrel_sta_info { |
| 62 | unsigned long stats_update; |
| 63 | unsigned int sp_ack_dur; |
| 64 | unsigned int rate_avg; |
| 65 | |
| 66 | unsigned int lowest_rix; |
| 67 | |
| 68 | unsigned int max_tp_rate; |
| 69 | unsigned int max_tp_rate2; |
| 70 | unsigned int max_prob_rate; |
| 71 | unsigned int packet_count; |
| 72 | unsigned int sample_count; |
| 73 | int sample_deferred; |
| 74 | |
Thomas Huehn | 8f15761 | 2013-03-04 23:30:03 +0100 | [diff] [blame] | 75 | unsigned int sample_row; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 76 | unsigned int sample_column; |
| 77 | |
| 78 | int n_rates; |
| 79 | struct minstrel_rate *r; |
Felix Fietkau | f4a8cd9 | 2008-10-15 19:13:59 +0200 | [diff] [blame] | 80 | bool prev_sample; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 81 | |
| 82 | /* sampling table */ |
| 83 | u8 *sample_table; |
| 84 | |
| 85 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 86 | struct dentry *dbg_stats; |
| 87 | #endif |
| 88 | }; |
| 89 | |
| 90 | struct minstrel_priv { |
| 91 | struct ieee80211_hw *hw; |
| 92 | bool has_mrr; |
| 93 | unsigned int cw_min; |
| 94 | unsigned int cw_max; |
| 95 | unsigned int max_retry; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 96 | unsigned int segment_size; |
| 97 | unsigned int update_interval; |
| 98 | unsigned int lookaround_rate; |
| 99 | unsigned int lookaround_rate_mrr; |
Zefir Kurtisi | 24f7580 | 2011-05-20 20:29:17 +0200 | [diff] [blame] | 100 | |
Felix Fietkau | a0497f9 | 2013-02-13 10:51:08 +0100 | [diff] [blame] | 101 | u8 cck_rates[4]; |
| 102 | |
Zefir Kurtisi | 24f7580 | 2011-05-20 20:29:17 +0200 | [diff] [blame] | 103 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 104 | /* |
| 105 | * enable fixed rate processing per RC |
| 106 | * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx |
| 107 | * - write -1 to enable RC processing again |
| 108 | * - setting will be applied on next update |
| 109 | */ |
| 110 | u32 fixed_rate_idx; |
| 111 | struct dentry *dbg_fixed_rate; |
| 112 | #endif |
| 113 | |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 114 | }; |
| 115 | |
Felix Fietkau | 44ac91e | 2010-03-01 22:17:38 +0100 | [diff] [blame] | 116 | struct minstrel_debugfs_info { |
| 117 | size_t len; |
| 118 | char buf[]; |
| 119 | }; |
| 120 | |
Felix Fietkau | eae4475 | 2010-03-01 22:21:40 +0100 | [diff] [blame] | 121 | extern struct rate_control_ops mac80211_minstrel; |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 122 | void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); |
| 123 | void minstrel_remove_sta_debugfs(void *priv, void *priv_sta); |
| 124 | |
Felix Fietkau | eae4475 | 2010-03-01 22:21:40 +0100 | [diff] [blame] | 125 | /* debugfs */ |
| 126 | int minstrel_stats_open(struct inode *inode, struct file *file); |
| 127 | ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos); |
| 128 | int minstrel_stats_release(struct inode *inode, struct file *file); |
| 129 | |
Felix Fietkau | cccf129 | 2008-10-05 18:07:45 +0200 | [diff] [blame] | 130 | #endif |