[linux-2.6-block.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)
{
	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';
	else if (mg->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
		htmode = '8';
	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 == MINSTREL_CCK_GROUP)
			p += sprintf(p, " CCK/%cP   ", j < 4 ? 'L' : 'S');
		else if (i >= MINSTREL_VHT_GROUP_0)
			p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode);
		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 == MINSTREL_CCK_GROUP) {
			int r = bitrates[j % 4];
			p += sprintf(p, " %2u.%1uM ", r / 10, r % 10);
		} else if (i >= MINSTREL_VHT_GROUP_0) {
			p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
		} 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;
	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(32768, 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, MINSTREL_CCK_GROUP, p);
	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
		p = minstrel_ht_stats_dump(mi, i, p);
	for (i++; i < ARRAY_SIZE(mi->groups); 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) > 32768);

	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	{
a0497f9f FF	21	const struct mcs_group *mg;
	22	unsigned int j, tp, prob, eprob;
	23	char htmode = '2';
	24	char gimode = 'L';
	25
	26	if (!mi->groups[i].supported)
	27	return p;
	28
	29	mg = &minstrel_mcs_groups[i];
	30	if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
	31	htmode = '4';
9208247d KB	32	else if (mg->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
9208247d KB	33	htmode = '8';
a0497f9f FF	34	if (mg->flags & IEEE80211_TX_RC_SHORT_GI)
	35	gimode = 'S';
	36
	37	for (j = 0; j < MCS_GROUP_RATES; j++) {
	38	struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
	39	static const int bitrates[4] = { 10, 20, 55, 110 };
	40	int idx = i * MCS_GROUP_RATES + j;
	41
	42	if (!(mi->groups[i].supported & BIT(j)))
	43	continue;
	44
8a0ee4fe	45	if (i == MINSTREL_CCK_GROUP)
9208247d KB	46	p += sprintf(p, " CCK/%cP ", j < 4 ? 'L' : 'S');
	47	else if (i >= MINSTREL_VHT_GROUP_0)
	48	p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode);
a0497f9f	49	else
9208247d	50	p += sprintf(p, " HT%c0/%cGI ", htmode, gimode);
a0497f9f	51
5935839a TH	52	*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
	53	*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
	54	*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
	55	*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
a0497f9f FF	56	*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
a0497f9f FF	57
8a0ee4fe	58	if (i == MINSTREL_CCK_GROUP) {
a0497f9f	59	int r = bitrates[j % 4];
9208247d KB	60	p += sprintf(p, " %2u.%1uM ", r / 10, r % 10);
	61	} else if (i >= MINSTREL_VHT_GROUP_0) {
	62	p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
a0497f9f	63	} else {
9208247d	64	p += sprintf(p, " MCS%-2u ", (mg->streams - 1) * 8 + j);
a0497f9f FF	65	}
	66
	67	tp = mr->cur_tp / 10;
	68	prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
	69	eprob = MINSTREL_TRUNC(mr->probability * 1000);
	70
11b2357d KB	71	p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u "
11b2357d KB	72	"%3u %4u(%4u) %9llu(%9llu)\n",
a0497f9f FF	73	tp / 10, tp % 10,
	74	eprob / 10, eprob % 10,
	75	prob / 10, prob % 10,
	76	mr->retry_count,
	77	mr->last_success,
	78	mr->last_attempts,
	79	(unsigned long long)mr->succ_hist,
	80	(unsigned long long)mr->att_hist);
	81	}
	82
	83	return p;
	84	}
	85
ec8aa669 FF	86	static int
	87	minstrel_ht_stats_open(struct inode inode, struct file file)
	88	{
	89	struct minstrel_ht_sta_priv *msp = inode->i_private;
	90	struct minstrel_ht_sta *mi = &msp->ht;
	91	struct minstrel_debugfs_info *ms;
a0497f9f	92	unsigned int i;
ec8aa669 FF	93	char *p;
	94	int ret;
	95
	96	if (!msp->is_ht) {
	97	inode->i_private = &msp->legacy;
	98	ret = minstrel_stats_open(inode, file);
	99	inode->i_private = msp;
	100	return ret;
	101	}
	102
9208247d	103	ms = kmalloc(32768, GFP_KERNEL);
ec8aa669 FF	104	if (!ms)
	105	return -ENOMEM;
	106
	107	file->private_data = ms;
	108	p = ms->buf;
9208247d	109	p += sprintf(p, " type rate tpt eprob *prob "
11b2357d KB	110	"ret ok(cum) ok( cum)\n");
11b2357d KB	111
8a0ee4fe KB	112	p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
8a0ee4fe KB	113	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
a0497f9f	114	p = minstrel_ht_stats_dump(mi, i, p);
9208247d KB	115	for (i++; i < ARRAY_SIZE(mi->groups); i++)
9208247d KB	116	p = minstrel_ht_stats_dump(mi, i, p);
ec8aa669	117
ec8aa669 FF	118	p += sprintf(p, "\nTotal packet count:: ideal %d "
	119	"lookaround %d\n",
	120	max(0, (int) mi->total_packets - (int) mi->sample_packets),
	121	mi->sample_packets);
	122	p += sprintf(p, "Average A-MPDU length: %d.%d\n",
	123	MINSTREL_TRUNC(mi->avg_ampdu_len),
	124	MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	125	ms->len = p - ms->buf;
	126
9208247d	127	WARN_ON(ms->len + sizeof(*ms) > 32768);
11b2357d	128
a0572d93	129	return nonseekable_open(inode, file);
ec8aa669 FF	130	}
	131
	132	static const struct file_operations minstrel_ht_stat_fops = {
	133	.owner = THIS_MODULE,
	134	.open = minstrel_ht_stats_open,
	135	.read = minstrel_stats_read,
	136	.release = minstrel_stats_release,
a0572d93	137	.llseek = no_llseek,
ec8aa669 FF	138	};
	139
	140	void
	141	minstrel_ht_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	142	{
	143	struct minstrel_ht_sta_priv *msp = priv_sta;
	144
	145	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
	146	&minstrel_ht_stat_fops);
	147	}
	148
	149	void
	150	minstrel_ht_remove_sta_debugfs(void priv, void priv_sta)
	151	{
	152	struct minstrel_ht_sta_priv *msp = priv_sta;
	153
	154	debugfs_remove(msp->dbg_stats);
	155	}