linux/net/mac80211/rc80211_minstrel.h
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   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
  12struct 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
  41struct 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
  70struct 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#ifdef CONFIG_MAC80211_DEBUGFS
  83        /*
  84         * enable fixed rate processing per RC
  85         *   - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
  86         *   - write -1 to enable RC processing again
  87         *   - setting will be applied on next update
  88         */
  89        u32 fixed_rate_idx;
  90        struct dentry *dbg_fixed_rate;
  91#endif
  92
  93};
  94
  95struct minstrel_debugfs_info {
  96        size_t len;
  97        char buf[];
  98};
  99
 100extern struct rate_control_ops mac80211_minstrel;
 101void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
 102void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
 103
 104/* debugfs */
 105int minstrel_stats_open(struct inode *inode, struct file *file);
 106ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
 107int minstrel_stats_release(struct inode *inode, struct file *file);
 108
 109#endif
 110
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