[deliverable/linux.git] / net / mac80211 / rc80211_minstrel_ht_debugfs.c

/*
 * Copyright (C) 2010 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.
 */
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/debugfs.h>
#include <linux/ieee80211.h>
#include <linux/export.h>
#include <net/mac80211.h>
#include "rc80211_minstrel.h"
#include "rc80211_minstrel_ht.h"

static char *
minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
{
	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
	const struct mcs_group *mg;
	unsigned int j, tp, prob, eprob;
	char htmode = '2';
	char gimode = 'L';

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

	mg = &minstrel_mcs_groups[i];
	if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
		htmode = '4';
	if (mg->flags & IEEE80211_TX_RC_SHORT_GI)
		gimode = 'S';

	for (j = 0; j < MCS_GROUP_RATES; j++) {
		struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
		static const int bitrates[4] = { 10, 20, 55, 110 };
		int idx = i * MCS_GROUP_RATES + j;

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

		if (i == max_mcs)
			p += sprintf(p, "CCK/%cP   ", j < 4 ? 'L' : 'S');
		else
			p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);

		*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
		*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
		*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
		*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
		*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';

		if (i == max_mcs) {
			int r = bitrates[j % 4];
			p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
		} else {
			p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
		}

		tp = mr->cur_tp / 10;
		prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
		eprob = MINSTREL_TRUNC(mr->probability * 1000);

		p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u "
				"%3u %4u(%4u) %9llu(%9llu)\n",
				tp / 10, tp % 10,
				eprob / 10, eprob % 10,
				prob / 10, prob % 10,
				mr->retry_count,
				mr->last_success,
				mr->last_attempts,
				(unsigned long long)mr->succ_hist,
				(unsigned long long)mr->att_hist);
	}

	return p;
}

static int
minstrel_ht_stats_open(struct inode *inode, struct file *file)
{
	struct minstrel_ht_sta_priv *msp = inode->i_private;
	struct minstrel_ht_sta *mi = &msp->ht;
	struct minstrel_debugfs_info *ms;
	unsigned int i;
	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
	char *p;
	int ret;

	if (!msp->is_ht) {
		inode->i_private = &msp->legacy;
		ret = minstrel_stats_open(inode, file);
		inode->i_private = msp;
		return ret;
	}

	ms = kmalloc(8192, GFP_KERNEL);
	if (!ms)
		return -ENOMEM;

	file->private_data = ms;
	p = ms->buf;
	p += sprintf(p, "type           rate     tpt eprob *prob "
			"ret  *ok(*cum)        ok(      cum)\n");


	p = minstrel_ht_stats_dump(mi, max_mcs, p);
	for (i = 0; i < max_mcs; i++)
		p = minstrel_ht_stats_dump(mi, i, p);

	p += sprintf(p, "\nTotal packet count::    ideal %d      "
			"lookaround %d\n",
			max(0, (int) mi->total_packets - (int) mi->sample_packets),
			mi->sample_packets);
	p += sprintf(p, "Average A-MPDU length: %d.%d\n",
		MINSTREL_TRUNC(mi->avg_ampdu_len),
		MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	ms->len = p - ms->buf;

	WARN_ON(ms->len + sizeof(*ms) > 8192);

	return nonseekable_open(inode, file);
}

static const struct file_operations minstrel_ht_stat_fops = {
	.owner = THIS_MODULE,
	.open = minstrel_ht_stats_open,
	.read = minstrel_stats_read,
	.release = minstrel_stats_release,
	.llseek = no_llseek,
};

void
minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
{
	struct minstrel_ht_sta_priv *msp = priv_sta;

	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
			&minstrel_ht_stat_fops);
}

void
minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
{
	struct minstrel_ht_sta_priv *msp = priv_sta;

	debugfs_remove(msp->dbg_stats);
}
Commit	Line	Data
ec8aa669 FF	1	/*
	2	* Copyright (C) 2010 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	#include <linux/netdevice.h>
	9	#include <linux/types.h>
	10	#include <linux/skbuff.h>
	11	#include <linux/debugfs.h>
	12	#include <linux/ieee80211.h>
bc3b2d7f	13	#include <linux/export.h>
ec8aa669 FF	14	#include <net/mac80211.h>
	15	#include "rc80211_minstrel.h"
	16	#include "rc80211_minstrel_ht.h"
	17
a0497f9f FF	18	static char *
	19	minstrel_ht_stats_dump(struct minstrel_ht_sta mi, int i, char p)
	20	{
	21	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
	22	const struct mcs_group *mg;
	23	unsigned int j, tp, prob, eprob;
	24	char htmode = '2';
	25	char gimode = 'L';
	26
	27	if (!mi->groups[i].supported)
	28	return p;
	29
	30	mg = &minstrel_mcs_groups[i];
	31	if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
	32	htmode = '4';
	33	if (mg->flags & IEEE80211_TX_RC_SHORT_GI)
	34	gimode = 'S';
	35
	36	for (j = 0; j < MCS_GROUP_RATES; j++) {
	37	struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
	38	static const int bitrates[4] = { 10, 20, 55, 110 };
	39	int idx = i * MCS_GROUP_RATES + j;
	40
	41	if (!(mi->groups[i].supported & BIT(j)))
	42	continue;
	43
	44	if (i == max_mcs)
	45	p += sprintf(p, "CCK/%cP ", j < 4 ? 'L' : 'S');
	46	else
	47	p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
	48
5935839a TH	49	*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
	50	*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
	51	*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
	52	*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
a0497f9f FF	53	*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
	54
	55	if (i == max_mcs) {
	56	int r = bitrates[j % 4];
	57	p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
	58	} else {
7a5e3fa2	59	p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
a0497f9f FF	60	}
	61
	62	tp = mr->cur_tp / 10;
	63	prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
	64	eprob = MINSTREL_TRUNC(mr->probability * 1000);
	65
11b2357d KB	66	p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u "
11b2357d KB	67	"%3u %4u(%4u) %9llu(%9llu)\n",
a0497f9f FF	68	tp / 10, tp % 10,
	69	eprob / 10, eprob % 10,
	70	prob / 10, prob % 10,
	71	mr->retry_count,
	72	mr->last_success,
	73	mr->last_attempts,
	74	(unsigned long long)mr->succ_hist,
	75	(unsigned long long)mr->att_hist);
	76	}
	77
	78	return p;
	79	}
	80
ec8aa669 FF	81	static int
	82	minstrel_ht_stats_open(struct inode inode, struct file file)
	83	{
	84	struct minstrel_ht_sta_priv *msp = inode->i_private;
	85	struct minstrel_ht_sta *mi = &msp->ht;
	86	struct minstrel_debugfs_info *ms;
a0497f9f FF	87	unsigned int i;
a0497f9f FF	88	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
ec8aa669 FF	89	char *p;
	90	int ret;
	91
	92	if (!msp->is_ht) {
	93	inode->i_private = &msp->legacy;
	94	ret = minstrel_stats_open(inode, file);
	95	inode->i_private = msp;
	96	return ret;
	97	}
	98
11b2357d	99	ms = kmalloc(8192, GFP_KERNEL);
ec8aa669 FF	100	if (!ms)
	101	return -ENOMEM;
	102
	103	file->private_data = ms;
	104	p = ms->buf;
11b2357d KB	105	p += sprintf(p, "type rate tpt eprob *prob "
	106	"ret ok(cum) ok( cum)\n");
	107
ec8aa669	108
a0497f9f FF	109	p = minstrel_ht_stats_dump(mi, max_mcs, p);
	110	for (i = 0; i < max_mcs; i++)
	111	p = minstrel_ht_stats_dump(mi, i, p);
ec8aa669	112
ec8aa669 FF	113	p += sprintf(p, "\nTotal packet count:: ideal %d "
	114	"lookaround %d\n",
	115	max(0, (int) mi->total_packets - (int) mi->sample_packets),
	116	mi->sample_packets);
	117	p += sprintf(p, "Average A-MPDU length: %d.%d\n",
	118	MINSTREL_TRUNC(mi->avg_ampdu_len),
	119	MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	120	ms->len = p - ms->buf;
	121
11b2357d KB	122	WARN_ON(ms->len + sizeof(*ms) > 8192);
11b2357d KB	123
a0572d93	124	return nonseekable_open(inode, file);
ec8aa669 FF	125	}
	126
	127	static const struct file_operations minstrel_ht_stat_fops = {
	128	.owner = THIS_MODULE,
	129	.open = minstrel_ht_stats_open,
	130	.read = minstrel_stats_read,
	131	.release = minstrel_stats_release,
a0572d93	132	.llseek = no_llseek,
ec8aa669 FF	133	};
	134
	135	void
	136	minstrel_ht_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	137	{
	138	struct minstrel_ht_sta_priv *msp = priv_sta;
	139
	140	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
	141	&minstrel_ht_stat_fops);
	142	}
	143
	144	void
	145	minstrel_ht_remove_sta_debugfs(void priv, void priv_sta)
	146	{
	147	struct minstrel_ht_sta_priv *msp = priv_sta;
	148
	149	debugfs_remove(msp->dbg_stats);
	150	}