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/*
* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/

#ifndef __RC_MINSTREL_H
#define __RC_MINSTREL_H

struct minstrel_rate {
int bitrate;
int rix;

unsigned int perfect_tx_time;
unsigned int ack_time;

int sample_limit;
unsigned int retry_count;
unsigned int retry_count_cts;
unsigned int retry_count_rtscts;
unsigned int adjusted_retry_count;

u32 success;
u32 attempts;
u32 last_attempts;
u32 last_success;

/* parts per thousand */
u32 cur_prob;
u32 probability;

/* per-rate throughput */
u32 cur_tp;

u64 succ_hist;
u64 att_hist;
};

struct minstrel_sta_info {
unsigned long stats_update;
unsigned int sp_ack_dur;
unsigned int rate_avg;

unsigned int lowest_rix;

unsigned int max_tp_rate;
unsigned int max_tp_rate2;
unsigned int max_prob_rate;
unsigned int packet_count;
unsigned int sample_count;
int sample_deferred;

unsigned int sample_idx;
unsigned int sample_column;

int n_rates;
struct minstrel_rate *r;
bool prev_sample;

/* sampling table */
u8 *sample_table;

#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *dbg_stats;
#endif
};

struct minstrel_priv {
struct ieee80211_hw *hw;
bool has_mrr;
unsigned int cw_min;
unsigned int cw_max;
unsigned int max_retry;
unsigned int ewma_level;
unsigned int segment_size;
unsigned int update_interval;
unsigned int lookaround_rate;
unsigned int lookaround_rate_mrr;

#ifdef CONFIG_MAC80211_DEBUGFS
/*
* enable fixed rate processing per RC
* - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
* - write -1 to enable RC processing again
* - setting will be applied on next update
*/
u32 fixed_rate_idx;
struct dentry *dbg_fixed_rate;
#endif

};

struct minstrel_debugfs_info {
size_t len;
char buf[];
};

extern struct rate_control_ops mac80211_minstrel;
void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);

/* debugfs */
int minstrel_stats_open(struct inode *inode, struct file *file);
ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
int minstrel_stats_release(struct inode *inode, struct file *file);

#endif
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