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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/net/mac80211/rc80211_minstrel_ht_debugfs.c
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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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#include <linux/netdevice.h>

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#include <linux/types.h>

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#include <linux/skbuff.h>

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#include <linux/debugfs.h>

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#include <linux/ieee80211.h>

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#include <net/mac80211.h>

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#include "rc80211_minstrel.h"

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#include "rc80211_minstrel_ht.h"

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static int

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minstrel_ht_stats_open(struct inode *inode, struct file *file)

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{

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	struct minstrel_ht_sta_priv *msp = inode->i_private;

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	struct minstrel_ht_sta *mi = &msp->ht;

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	struct minstrel_debugfs_info *ms;

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	unsigned int i, j, tp, prob, eprob;

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	char *p;

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	int ret;

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	if (!msp->is_ht) {

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		inode->i_private = &msp->legacy;

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		ret = minstrel_stats_open(inode, file);

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		inode->i_private = msp;

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		return ret;

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	}

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	ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);

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	if (!ms)

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		return -ENOMEM;

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	file->private_data = ms;

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	p = ms->buf;

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	p += sprintf(p, "type      rate     throughput  ewma prob   this prob  "

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			"this succ/attempt   success    attempts\n");

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	for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) {

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		char htmode = '2';

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		char gimode = 'L';

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		if (!mi->groups[i].supported)

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			continue;

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		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)

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			htmode = '4';

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		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI)

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			gimode = 'S';

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		for (j = 0; j < MCS_GROUP_RATES; j++) {

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			struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];

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			int idx = i * MCS_GROUP_RATES + j;

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			if (!(mi->groups[i].supported & BIT(j)))

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				continue;

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			p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);

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			*(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';

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			*(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';

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			*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';

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			p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].streams - 1) *

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					MCS_GROUP_RATES + j);

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			tp = mr->cur_tp / 10;

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			prob = MINSTREL_TRUNC(mr->cur_prob * 1000);

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			eprob = MINSTREL_TRUNC(mr->probability * 1000);

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			p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "

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					"%3u(%3u)   %8llu    %8llu\n",

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					tp / 10, tp % 10,

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					eprob / 10, eprob % 10,

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					prob / 10, prob % 10,

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					mr->last_success,

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					mr->last_attempts,

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					(unsigned long long)mr->succ_hist,

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					(unsigned long long)mr->att_hist);

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		}

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	}

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	p += sprintf(p, "\nTotal packet count::    ideal %d      "

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			"lookaround %d\n",

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			max(0, (int) mi->total_packets - (int) mi->sample_packets),

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			mi->sample_packets);

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	p += sprintf(p, "Average A-MPDU length: %d.%d\n",

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		MINSTREL_TRUNC(mi->avg_ampdu_len),

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		MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);

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	ms->len = p - ms->buf;

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	return nonseekable_open(inode, file);

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}

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static const struct file_operations minstrel_ht_stat_fops = {

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	.owner = THIS_MODULE,

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	.open = minstrel_ht_stats_open,

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	.read = minstrel_stats_read,

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	.release = minstrel_stats_release,

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	.llseek = no_llseek,

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};

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void

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

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{

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	struct minstrel_ht_sta_priv *msp = priv_sta;

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	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,

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			&minstrel_ht_stat_fops);

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}

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void

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minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)

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{

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	struct minstrel_ht_sta_priv *msp = priv_sta;

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	debugfs_remove(msp->dbg_stats);

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}

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