[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_avg, prob, eprob, tx_time;
	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 *mrs = &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  ", htmode);
			p += sprintf(p, "%cGI  ", gimode);
			p += sprintf(p, "%d  ", mg->streams);
		} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
			p += sprintf(p, "VHT%c0 ", htmode);
			p += sprintf(p, "%cGI ", gimode);
			p += sprintf(p, "%d  ", mg->streams);
		} else {
			p += sprintf(p, "CCK    ");
			p += sprintf(p, "%cP  ", j < 4 ? 'L' : 'S');
			p += sprintf(p, "1 ");
		}

		*(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);
		}

		p += sprintf(p, "  %3u  ", idx);

		/* tx_time[rate(i)] in usec */
		tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
		p += sprintf(p, "%6u   ", tx_time);

		tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
		prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
		eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);

		p += sprintf(p, "%4u.%1u   %3u.%1u     %3u.%1u "
				"%3u   %3u %-3u   %9llu   %-9llu\n",
				tp_avg / 10, tp_avg % 10,
				eprob / 10, eprob % 10,
				prob / 10, prob % 10,
				mrs->retry_count,
				mrs->last_success,
				mrs->last_attempts,
				(unsigned long long)mrs->succ_hist,
				(unsigned long long)mrs->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;
	int ret;
	char *p;

	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, "\n");
	p += sprintf(p, "              best   ________rate______    "
			"__statistics__    ________last_______    "
			"______sum-of________\n");
	p += sprintf(p, "mode guard #  rate  [name   idx airtime]  [ ø(tp) "
			"ø(prob)]  [prob.|retry|suc|att]  [#success | "
			"#attempts]\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 # of aggregated frames per A-MPDU: %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,
};

static char *
minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
{
	const struct mcs_group *mg;
	unsigned int j, tp_avg, prob, eprob, tx_time;
	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 *mrs = &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,", htmode);
			p += sprintf(p, "%cGI,", gimode);
			p += sprintf(p, "%d,", mg->streams);
		} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
			p += sprintf(p, "VHT%c0,", htmode);
			p += sprintf(p, "%cGI,", gimode);
			p += sprintf(p, "%d,", mg->streams);
		} else {
			p += sprintf(p, "CCK,");
			p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
			p += sprintf(p, "1,");
		}

		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
		p += sprintf(p, "%s" ,((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);
		}

		p += sprintf(p, "%u,", idx);
		tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
		p += sprintf(p, "%u,", tx_time);

		tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
		prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
		eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);

		p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,%llu,%llu,",
				tp_avg / 10, tp_avg % 10,
				eprob / 10, eprob % 10,
				prob / 10, prob % 10,
				mrs->retry_count,
				mrs->last_success,
				mrs->last_attempts,
				(unsigned long long)mrs->succ_hist,
				(unsigned long long)mrs->att_hist);
		p += sprintf(p, "%d,%d,%d.%d\n",
				max(0, (int) mi->total_packets -
				(int) mi->sample_packets),
				mi->sample_packets,
				MINSTREL_TRUNC(mi->avg_ampdu_len),
				MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	}

	return p;
}

static int
minstrel_ht_stats_csv_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;
	int ret;
	char *p;

	if (!msp->is_ht) {
		inode->i_private = &msp->legacy;
		ret = minstrel_stats_csv_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 = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
		p = minstrel_ht_stats_csv_dump(mi, i, p);
	for (i++; i < ARRAY_SIZE(mi->groups); i++)
		p = minstrel_ht_stats_csv_dump(mi, i, p);

	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_csv_fops = {
	.owner = THIS_MODULE,
	.open = minstrel_ht_stats_csv_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);
	msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO,
			     dir, msp, &minstrel_ht_stat_csv_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);
	debugfs_remove(msp->dbg_stats_csv);
}
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	21	const struct mcs_group *mg;
6a27b2c4	22	unsigned int j, tp_avg, prob, eprob, tx_time;
a0497f9f FF	23	char htmode = '2';
a0497f9f FF	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++) {
9134073b	41	struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
a0497f9f FF	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
9c00bb72 TH	48	if (gflags & IEEE80211_TX_RC_MCS) {
	49	p += sprintf(p, "HT%c0 ", htmode);
	50	p += sprintf(p, "%cGI ", gimode);
	51	p += sprintf(p, "%d ", mg->streams);
	52	} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
	53	p += sprintf(p, "VHT%c0 ", htmode);
	54	p += sprintf(p, "%cGI ", gimode);
	55	p += sprintf(p, "%d ", mg->streams);
	56	} else {
	57	p += sprintf(p, "CCK ");
	58	p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
	59	p += sprintf(p, "1 ");
	60	}
a0497f9f	61
5935839a TH	62	*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
	63	*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
	64	*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
	65	*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
a0497f9f FF	66	*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
a0497f9f FF	67
8ec7886b	68	if (gflags & IEEE80211_TX_RC_MCS) {
9c00bb72	69	p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
8ec7886b	70	} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
9c00bb72	71	p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
a0497f9f	72	} else {
8ec7886b KB	73	int r = bitrates[j % 4];
8ec7886b KB	74
9c00bb72	75	p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
a0497f9f FF	76	}
a0497f9f FF	77
9c00bb72 TH	78	p += sprintf(p, " %3u ", idx);
	79
	80	/* tx_time[rate(i)] in usec */
	81	tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
	82	p += sprintf(p, "%6u ", tx_time);
	83
6a27b2c4	84	tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
9134073b TH	85	prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
9134073b TH	86	eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
a0497f9f	87
9c00bb72 TH	88	p += sprintf(p, "%4u.%1u %3u.%1u %3u.%1u "
9c00bb72 TH	89	"%3u %3u %-3u %9llu %-9llu\n",
6a27b2c4	90	tp_avg / 10, tp_avg % 10,
a0497f9f FF	91	eprob / 10, eprob % 10,
a0497f9f FF	92	prob / 10, prob % 10,
9134073b TH	93	mrs->retry_count,
	94	mrs->last_success,
	95	mrs->last_attempts,
	96	(unsigned long long)mrs->succ_hist,
	97	(unsigned long long)mrs->att_hist);
a0497f9f FF	98	}
	99
	100	return p;
	101	}
	102
ec8aa669 FF	103	static int
	104	minstrel_ht_stats_open(struct inode inode, struct file file)
	105	{
	106	struct minstrel_ht_sta_priv *msp = inode->i_private;
	107	struct minstrel_ht_sta *mi = &msp->ht;
	108	struct minstrel_debugfs_info *ms;
a0497f9f	109	unsigned int i;
ec8aa669	110	int ret;
2cae0b6a	111	char *p;
ec8aa669 FF	112
	113	if (!msp->is_ht) {
	114	inode->i_private = &msp->legacy;
	115	ret = minstrel_stats_open(inode, file);
	116	inode->i_private = msp;
	117	return ret;
	118	}
	119
9208247d	120	ms = kmalloc(32768, GFP_KERNEL);
ec8aa669 FF	121	if (!ms)
	122	return -ENOMEM;
	123
	124	file->private_data = ms;
	125	p = ms->buf;
9c00bb72 TH	126
	127	p += sprintf(p, "\n");
	128	p += sprintf(p, " best ________rate______ "
	129	"__statistics__ ________last_______ "
	130	"______sum-of________\n");
	131	p += sprintf(p, "mode guard # rate [name idx airtime] [ ø(tp) "
	132	"ø(prob)] [prob.\|retry\|suc\|att] [#success \| "
	133	"#attempts]\n");
11b2357d	134
8a0ee4fe KB	135	p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
8a0ee4fe KB	136	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
a0497f9f	137	p = minstrel_ht_stats_dump(mi, i, p);
9208247d KB	138	for (i++; i < ARRAY_SIZE(mi->groups); i++)
9208247d KB	139	p = minstrel_ht_stats_dump(mi, i, p);
ec8aa669	140
ec8aa669 FF	141	p += sprintf(p, "\nTotal packet count:: ideal %d "
	142	"lookaround %d\n",
	143	max(0, (int) mi->total_packets - (int) mi->sample_packets),
	144	mi->sample_packets);
9c00bb72	145	p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
ec8aa669 FF	146	MINSTREL_TRUNC(mi->avg_ampdu_len),
	147	MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	148	ms->len = p - ms->buf;
9208247d	149	WARN_ON(ms->len + sizeof(*ms) > 32768);
11b2357d	150
a0572d93	151	return nonseekable_open(inode, file);
ec8aa669 FF	152	}
	153
	154	static const struct file_operations minstrel_ht_stat_fops = {
	155	.owner = THIS_MODULE,
	156	.open = minstrel_ht_stats_open,
	157	.read = minstrel_stats_read,
	158	.release = minstrel_stats_release,
a0572d93	159	.llseek = no_llseek,
ec8aa669 FF	160	};
ec8aa669 FF	161
2cae0b6a TH	162	static char *
	163	minstrel_ht_stats_csv_dump(struct minstrel_ht_sta mi, int i, char p)
	164	{
	165	const struct mcs_group *mg;
6a27b2c4	166	unsigned int j, tp_avg, prob, eprob, tx_time;
2cae0b6a TH	167	char htmode = '2';
	168	char gimode = 'L';
	169	u32 gflags;
	170
	171	if (!mi->groups[i].supported)
	172	return p;
	173
	174	mg = &minstrel_mcs_groups[i];
	175	gflags = mg->flags;
	176
	177	if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
	178	htmode = '4';
	179	else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
	180	htmode = '8';
	181	if (gflags & IEEE80211_TX_RC_SHORT_GI)
	182	gimode = 'S';
	183
	184	for (j = 0; j < MCS_GROUP_RATES; j++) {
9134073b	185	struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
2cae0b6a TH	186	static const int bitrates[4] = { 10, 20, 55, 110 };
	187	int idx = i * MCS_GROUP_RATES + j;
	188
	189	if (!(mi->groups[i].supported & BIT(j)))
	190	continue;
	191
	192	if (gflags & IEEE80211_TX_RC_MCS) {
	193	p += sprintf(p, "HT%c0,", htmode);
	194	p += sprintf(p, "%cGI,", gimode);
	195	p += sprintf(p, "%d,", mg->streams);
	196	} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
	197	p += sprintf(p, "VHT%c0,", htmode);
	198	p += sprintf(p, "%cGI,", gimode);
	199	p += sprintf(p, "%d,", mg->streams);
	200	} else {
	201	p += sprintf(p, "CCK,");
	202	p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
	203	p += sprintf(p, "1,");
	204	}
	205
	206	p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
	207	p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
	208	p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
	209	p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
	210	p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
	211
	212	if (gflags & IEEE80211_TX_RC_MCS) {
	213	p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
	214	} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
	215	p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
	216	} else {
	217	int r = bitrates[j % 4];
	218	p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
	219	}
	220
	221	p += sprintf(p, "%u,", idx);
	222	tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
	223	p += sprintf(p, "%u,", tx_time);
	224
6a27b2c4	225	tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
9134073b TH	226	prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
9134073b TH	227	eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
2cae0b6a TH	228
2cae0b6a TH	229	p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,%llu,%llu,",
6a27b2c4	230	tp_avg / 10, tp_avg % 10,
2cae0b6a TH	231	eprob / 10, eprob % 10,
2cae0b6a TH	232	prob / 10, prob % 10,
9134073b TH	233	mrs->retry_count,
	234	mrs->last_success,
	235	mrs->last_attempts,
	236	(unsigned long long)mrs->succ_hist,
	237	(unsigned long long)mrs->att_hist);
2cae0b6a TH	238	p += sprintf(p, "%d,%d,%d.%d\n",
	239	max(0, (int) mi->total_packets -
	240	(int) mi->sample_packets),
	241	mi->sample_packets,
	242	MINSTREL_TRUNC(mi->avg_ampdu_len),
	243	MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
	244	}
	245
	246	return p;
	247	}
	248
	249	static int
	250	minstrel_ht_stats_csv_open(struct inode inode, struct file file)
	251	{
	252	struct minstrel_ht_sta_priv *msp = inode->i_private;
	253	struct minstrel_ht_sta *mi = &msp->ht;
	254	struct minstrel_debugfs_info *ms;
	255	unsigned int i;
	256	int ret;
	257	char *p;
	258
	259	if (!msp->is_ht) {
	260	inode->i_private = &msp->legacy;
	261	ret = minstrel_stats_csv_open(inode, file);
	262	inode->i_private = msp;
	263	return ret;
	264	}
	265
	266	ms = kmalloc(32768, GFP_KERNEL);
	267
	268	if (!ms)
	269	return -ENOMEM;
	270
	271	file->private_data = ms;
	272
	273	p = ms->buf;
	274
	275	p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
	276	for (i = 0; i < MINSTREL_CCK_GROUP; i++)
	277	p = minstrel_ht_stats_csv_dump(mi, i, p);
	278	for (i++; i < ARRAY_SIZE(mi->groups); i++)
	279	p = minstrel_ht_stats_csv_dump(mi, i, p);
	280
	281	ms->len = p - ms->buf;
	282	WARN_ON(ms->len + sizeof(*ms) > 32768);
	283
	284	return nonseekable_open(inode, file);
	285	}
	286
	287	static const struct file_operations minstrel_ht_stat_csv_fops = {
	288	.owner = THIS_MODULE,
	289	.open = minstrel_ht_stats_csv_open,
	290	.read = minstrel_stats_read,
	291	.release = minstrel_stats_release,
	292	.llseek = no_llseek,
	293	};
	294
ec8aa669 FF	295	void
	296	minstrel_ht_add_sta_debugfs(void priv, void priv_sta, struct dentry *dir)
	297	{
	298	struct minstrel_ht_sta_priv *msp = priv_sta;
	299
	300	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
	301	&minstrel_ht_stat_fops);
2cae0b6a TH	302	msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO,
2cae0b6a TH	303	dir, msp, &minstrel_ht_stat_csv_fops);
ec8aa669 FF	304	}
	305
	306	void
	307	minstrel_ht_remove_sta_debugfs(void priv, void priv_sta)
	308	{
	309	struct minstrel_ht_sta_priv *msp = priv_sta;
	310
	311	debugfs_remove(msp->dbg_stats);
2cae0b6a	312	debugfs_remove(msp->dbg_stats_csv);
ec8aa669	313	}