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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/net/mac80211/rc80211_minstrel_ht.h
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/*

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 * Copyright (C) 2010 Felix Fietkau <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 */

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#ifndef __RC_MINSTREL_HT_H

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#define __RC_MINSTREL_HT_H

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/*

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 * The number of streams can be changed to 2 to reduce code

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 * size and memory footprint.

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 */

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#define MINSTREL_MAX_STREAMS	3

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#define MINSTREL_STREAM_GROUPS	4

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/* scaled fraction values */

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#define MINSTREL_SCALE	16

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#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)

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#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)

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#define MCS_GROUP_RATES	8

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struct mcs_group {

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	u32 flags;

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	unsigned int streams;

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	unsigned int duration[MCS_GROUP_RATES];

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};

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extern const struct mcs_group minstrel_mcs_groups[];

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struct minstrel_rate_stats {

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	/* current / last sampling period attempts/success counters */

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	unsigned int attempts, last_attempts;

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	unsigned int success, last_success;

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	/* total attempts/success counters */

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	u64 att_hist, succ_hist;

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	/* current throughput */

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	unsigned int cur_tp;

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	/* packet delivery probabilities */

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	unsigned int cur_prob, probability;

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	/* maximum retry counts */

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	unsigned int retry_count;

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	unsigned int retry_count_rtscts;

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	bool retry_updated;

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	u8 sample_skipped;

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};

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struct minstrel_mcs_group_data {

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	u8 index;

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	u8 column;

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	/* bitfield of supported MCS rates of this group */

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	u8 supported;

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	/* selected primary rates */

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	unsigned int max_tp_rate;

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	unsigned int max_tp_rate2;

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	unsigned int max_prob_rate;

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	/* MCS rate statistics */

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	struct minstrel_rate_stats rates[MCS_GROUP_RATES];

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};

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struct minstrel_ht_sta {

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	/* ampdu length (average, per sampling interval) */

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	unsigned int ampdu_len;

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	unsigned int ampdu_packets;

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	/* ampdu length (EWMA) */

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	unsigned int avg_ampdu_len;

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	/* best throughput rate */

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	unsigned int max_tp_rate;

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	/* second best throughput rate */

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	unsigned int max_tp_rate2;

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	/* best probability rate */

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	unsigned int max_prob_rate;

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	/* time of last status update */

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	unsigned long stats_update;

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	/* overhead time in usec for each frame */

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	unsigned int overhead;

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	unsigned int overhead_rtscts;

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	unsigned int total_packets;

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	unsigned int sample_packets;

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	/* tx flags to add for frames for this sta */

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	u32 tx_flags;

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	u8 sample_wait;

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	u8 sample_tries;

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	u8 sample_count;

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	u8 sample_slow;

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	/* current MCS group to be sampled */

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	u8 sample_group;

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	/* MCS rate group info and statistics */

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	struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS];

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};

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struct minstrel_ht_sta_priv {

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	union {

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		struct minstrel_ht_sta ht;

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		struct minstrel_sta_info legacy;

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	};

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#ifdef CONFIG_MAC80211_DEBUGFS

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	struct dentry *dbg_stats;

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#endif

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	void *ratelist;

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	void *sample_table;

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	bool is_ht;

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};

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void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);

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void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);

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#endif

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