[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)
{
	const struct mcs_group *mg;
	unsigned int j, tp, prob, eprob;
	char htmode = '2';
	char gimode = 'L';
	u32 gflags;

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

	mg = &minstrel_mcs_groups[i];
	gflags = mg->flags;

	if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
		htmode = '4';
	else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
		htmode = '8';
	if (gflags & 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 (gflags & IEEE80211_TX_RC_MCS)
			p += sprintf(p, " HT%c0/%cGI ", htmode, gimode);
		else if (gflags & IEEE80211_TX_RC_VHT_MCS)
			p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode);
		else
			p += sprintf(p, " CCK/%cP   ", j < 4 ? 'L' : 'S');

		*(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 (gflags & IEEE80211_TX_RC_MCS) {
			p += sprintf(p, " MCS%-2u ", (mg->streams - 1) * 8 + j);
		} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
			p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
		} else {
			int r = bitrates[j % 4];

			p += sprintf(p, " %2u.%1uM ", r / 10, r % 10);
		}

		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';
8ec7886b	25	u32 gflags;
a0497f9f FF	26
	27	if (!mi->groups[i].supported)
	28	return p;
	29
	30	mg = &minstrel_mcs_groups[i];
8ec7886b KB	31	gflags = mg->flags;
	32
	33	if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
a0497f9f	34	htmode = '4';
8ec7886b	35	else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
9208247d	36	htmode = '8';
8ec7886b	37	if (gflags & IEEE80211_TX_RC_SHORT_GI)
a0497f9f FF	38	gimode = 'S';
	39
	40	for (j = 0; j < MCS_GROUP_RATES; j++) {
	41	struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
	42	static const int bitrates[4] = { 10, 20, 55, 110 };
	43	int idx = i * MCS_GROUP_RATES + j;
	44
	45	if (!(mi->groups[i].supported & BIT(j)))
	46	continue;
	47
8ec7886b KB	48	if (gflags & IEEE80211_TX_RC_MCS)
	49	p += sprintf(p, " HT%c0/%cGI ", htmode, gimode);
	50	else if (gflags & IEEE80211_TX_RC_VHT_MCS)
9208247d	51	p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode);
a0497f9f	52	else
8ec7886b	53	p += sprintf(p, " CCK/%cP ", j < 4 ? 'L' : 'S');
a0497f9f	54
5935839a TH	55	*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
	56	*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
	57	*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
	58	*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
a0497f9f FF	59	*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
a0497f9f FF	60
8ec7886b KB	61	if (gflags & IEEE80211_TX_RC_MCS) {
	62	p += sprintf(p, " MCS%-2u ", (mg->streams - 1) * 8 + j);
	63	} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
9208247d	64	p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
a0497f9f	65	} else {
8ec7886b KB	66	int r = bitrates[j % 4];
	67
	68	p += sprintf(p, " %2u.%1uM ", r / 10, r % 10);
a0497f9f FF	69	}
	70
	71	tp = mr->cur_tp / 10;
	72	prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
	73	eprob = MINSTREL_TRUNC(mr->probability * 1000);
	74
11b2357d KB	75	p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u "
11b2357d KB	76	"%3u %4u(%4u) %9llu(%9llu)\n",
a0497f9f FF	77	tp / 10, tp % 10,
	78	eprob / 10, eprob % 10,
	79	prob / 10, prob % 10,
	80	mr->retry_count,
	81	mr->last_success,
	82	mr->last_attempts,
	83	(unsigned long long)mr->succ_hist,
	84	(unsigned long long)mr->att_hist);
	85	}
	86
	87	return p;
	88	}
	89
ec8aa669 FF	90	static int
	91	minstrel_ht_stats_open(struct inode inode, struct file file)
	92	{
	93	struct minstrel_ht_sta_priv *msp = inode->i_private;
	94	struct minstrel_ht_sta *mi = &msp->ht;
	95	struct minstrel_debugfs_info *ms;
a0497f9f	96	unsigned int i;
ec8aa669 FF	97	char *p;
	98	int ret;
	99
	100	if (!msp->is_ht) {
	101	inode->i_private = &msp->legacy;
	102	ret = minstrel_stats_open(inode, file);
	103	inode->i_private = msp;
	104	return ret;
	105	}
	106
9208247d	107	ms = kmalloc(32768, GFP_KERNEL);
ec8aa669 FF	108	if (!ms)
	109	return -ENOMEM;
	110
	111	file->private_data = ms;
	112	p = ms->buf;
9208247d	113	p += sprintf(p, " type rate tpt eprob *prob "
11b2357d KB	114	"ret ok(cum) ok( cum)\n");
11b2357d KB	115
8a0ee4fe KB	116	p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
8a0ee4fe KB	117	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
a0497f9f	118	p = minstrel_ht_stats_dump(mi, i, p);
9208247d KB	119	for (i++; i < ARRAY_SIZE(mi->groups); i++)
9208247d KB	120	p = minstrel_ht_stats_dump(mi, i, p);
ec8aa669	121
ec8aa669 FF	122	p += sprintf(p, "\nTotal packet count:: ideal %d "
	123	"lookaround %d\n",
	124	max(0, (int) mi->total_packets - (int) mi->sample_packets),
	125	mi->sample_packets);
	126	p += sprintf(p, "Average A-MPDU length: %d.%d\n",
	127	MINSTREL_TRUNC(mi->avg_ampdu_len),
	128	MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	129	ms->len = p - ms->buf;
	130
9208247d	131	WARN_ON(ms->len + sizeof(*ms) > 32768);
11b2357d	132
a0572d93	133	return nonseekable_open(inode, file);
ec8aa669 FF	134	}
	135
	136	static const struct file_operations minstrel_ht_stat_fops = {
	137	.owner = THIS_MODULE,
	138	.open = minstrel_ht_stats_open,
	139	.read = minstrel_stats_read,
	140	.release = minstrel_stats_release,
a0572d93	141	.llseek = no_llseek,
ec8aa669 FF	142	};
	143
	144	void
	145	minstrel_ht_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	146	{
	147	struct minstrel_ht_sta_priv *msp = priv_sta;
	148
	149	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
	150	&minstrel_ht_stat_fops);
	151	}
	152
	153	void
	154	minstrel_ht_remove_sta_debugfs(void priv, void priv_sta)
	155	{
	156	struct minstrel_ht_sta_priv *msp = priv_sta;
	157
	158	debugfs_remove(msp->dbg_stats);
	159	}