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 
12 struct minstrel_rate {
13 	int bitrate;
14 	int rix;
15 
16 	unsigned int perfect_tx_time;
17 	unsigned int ack_time;
18 
19 	int sample_limit;
20 	unsigned int retry_count;
21 	unsigned int retry_count_cts;
22 	unsigned int retry_count_rtscts;
23 	unsigned int adjusted_retry_count;
24 
25 	u32 success;
26 	u32 attempts;
27 	u32 last_attempts;
28 	u32 last_success;
29 
30 	/* parts per thousand */
31 	u32 cur_prob;
32 	u32 probability;
33 
34 	/* per-rate throughput */
35 	u32 cur_tp;
36 
37 	u64 succ_hist;
38 	u64 att_hist;
39 };
40 
41 struct minstrel_sta_info {
42 	unsigned long stats_update;
43 	unsigned int sp_ack_dur;
44 	unsigned int rate_avg;
45 
46 	unsigned int lowest_rix;
47 
48 	unsigned int max_tp_rate;
49 	unsigned int max_tp_rate2;
50 	unsigned int max_prob_rate;
51 	unsigned int packet_count;
52 	unsigned int sample_count;
53 	int sample_deferred;
54 
55 	unsigned int sample_idx;
56 	unsigned int sample_column;
57 
58 	int n_rates;
59 	struct minstrel_rate *r;
60 	bool prev_sample;
61 
62 	/* sampling table */
63 	u8 *sample_table;
64 
65 #ifdef CONFIG_MAC80211_DEBUGFS
66 	struct dentry *dbg_stats;
67 #endif
68 };
69 
70 struct minstrel_priv {
71 	struct ieee80211_hw *hw;
72 	bool has_mrr;
73 	unsigned int cw_min;
74 	unsigned int cw_max;
75 	unsigned int max_retry;
76 	unsigned int ewma_level;
77 	unsigned int segment_size;
78 	unsigned int update_interval;
79 	unsigned int lookaround_rate;
80 	unsigned int lookaround_rate_mrr;
81 };
82 
83 struct minstrel_debugfs_info {
84 	size_t len;
85 	char buf[];
86 };
87 
88 extern struct rate_control_ops mac80211_minstrel;
89 void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
90 void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
91 
92 /* debugfs */
93 int minstrel_stats_open(struct inode *inode, struct file *file);
94 ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
95 int minstrel_stats_release(struct inode *inode, struct file *file);
96 
97 #endif
98