320 lines
8.9 KiB
C
320 lines
8.9 KiB
C
/*
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* Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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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 <linux/export.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 char *
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minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
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{
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const struct mcs_group *mg;
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unsigned int j, tp_max, tp_avg, eprob, tx_time;
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char htmode = '2';
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char gimode = 'L';
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u32 gflags;
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if (!mi->supported[i])
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return p;
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mg = &minstrel_mcs_groups[i];
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gflags = mg->flags;
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if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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htmode = '4';
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else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
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htmode = '8';
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if (gflags & 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 *mrs = &mi->groups[i].rates[j];
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static const int bitrates[4] = { 10, 20, 55, 110 };
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int idx = i * MCS_GROUP_RATES + j;
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unsigned int prob_ewmsd;
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if (!(mi->supported[i] & BIT(j)))
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continue;
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if (gflags & IEEE80211_TX_RC_MCS) {
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p += sprintf(p, "HT%c0 ", htmode);
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p += sprintf(p, "%cGI ", gimode);
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p += sprintf(p, "%d ", mg->streams);
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} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
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p += sprintf(p, "VHT%c0 ", htmode);
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p += sprintf(p, "%cGI ", gimode);
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p += sprintf(p, "%d ", mg->streams);
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} else {
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p += sprintf(p, "CCK ");
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p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
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p += sprintf(p, "1 ");
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}
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*(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
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*(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
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*(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
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*(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
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*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
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if (gflags & IEEE80211_TX_RC_MCS) {
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p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
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} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
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p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
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} else {
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int r = bitrates[j % 4];
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p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
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}
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p += sprintf(p, " %3u ", idx);
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/* tx_time[rate(i)] in usec */
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tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
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p += sprintf(p, "%6u ", tx_time);
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tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
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tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
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eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
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prob_ewmsd = minstrel_get_ewmsd10(mrs);
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p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u"
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" %3u %3u %-3u "
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"%9llu %-9llu\n",
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tp_max / 10, tp_max % 10,
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tp_avg / 10, tp_avg % 10,
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eprob / 10, eprob % 10,
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prob_ewmsd / 10, prob_ewmsd % 10,
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mrs->retry_count,
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mrs->last_success,
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mrs->last_attempts,
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(unsigned long long)mrs->succ_hist,
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(unsigned long long)mrs->att_hist);
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}
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return p;
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}
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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;
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int ret;
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char *p;
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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(32768, 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, "\n");
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p += sprintf(p,
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" best ____________rate__________ ________statistics________ _____last____ ______sum-of________\n");
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p += sprintf(p,
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"mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob) sd(prob)] [retry|suc|att] [#success | #attempts]\n");
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p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
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for (i = 0; i < MINSTREL_CCK_GROUP; i++)
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p = minstrel_ht_stats_dump(mi, i, p);
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for (i++; i < ARRAY_SIZE(mi->groups); i++)
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p = minstrel_ht_stats_dump(mi, i, p);
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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 # of aggregated frames per A-MPDU: %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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WARN_ON(ms->len + sizeof(*ms) > 32768);
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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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static char *
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minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
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{
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const struct mcs_group *mg;
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unsigned int j, tp_max, tp_avg, eprob, tx_time;
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char htmode = '2';
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char gimode = 'L';
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u32 gflags;
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if (!mi->supported[i])
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return p;
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mg = &minstrel_mcs_groups[i];
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gflags = mg->flags;
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if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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htmode = '4';
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else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
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htmode = '8';
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if (gflags & 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 *mrs = &mi->groups[i].rates[j];
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static const int bitrates[4] = { 10, 20, 55, 110 };
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int idx = i * MCS_GROUP_RATES + j;
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unsigned int prob_ewmsd;
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if (!(mi->supported[i] & BIT(j)))
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continue;
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if (gflags & IEEE80211_TX_RC_MCS) {
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p += sprintf(p, "HT%c0,", htmode);
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p += sprintf(p, "%cGI,", gimode);
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p += sprintf(p, "%d,", mg->streams);
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} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
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p += sprintf(p, "VHT%c0,", htmode);
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p += sprintf(p, "%cGI,", gimode);
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p += sprintf(p, "%d,", mg->streams);
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} else {
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p += sprintf(p, "CCK,");
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p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
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p += sprintf(p, "1,");
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}
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p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
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p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
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p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
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p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
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p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
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if (gflags & IEEE80211_TX_RC_MCS) {
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p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
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} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
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p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
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} else {
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int r = bitrates[j % 4];
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p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
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}
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p += sprintf(p, "%u,", idx);
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tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
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p += sprintf(p, "%u,", tx_time);
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tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
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tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
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eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
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prob_ewmsd = minstrel_get_ewmsd10(mrs);
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p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,"
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"%u,%llu,%llu,",
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tp_max / 10, tp_max % 10,
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tp_avg / 10, tp_avg % 10,
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eprob / 10, eprob % 10,
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prob_ewmsd / 10, prob_ewmsd % 10,
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mrs->retry_count,
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mrs->last_success,
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mrs->last_attempts,
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(unsigned long long)mrs->succ_hist,
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(unsigned long long)mrs->att_hist);
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p += sprintf(p, "%d,%d,%d.%d\n",
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max(0, (int) mi->total_packets -
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(int) mi->sample_packets),
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mi->sample_packets,
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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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}
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return p;
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}
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static int
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minstrel_ht_stats_csv_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;
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int ret;
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char *p;
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if (!msp->is_ht) {
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inode->i_private = &msp->legacy;
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ret = minstrel_stats_csv_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(32768, 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 = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
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for (i = 0; i < MINSTREL_CCK_GROUP; i++)
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p = minstrel_ht_stats_csv_dump(mi, i, p);
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for (i++; i < ARRAY_SIZE(mi->groups); i++)
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p = minstrel_ht_stats_csv_dump(mi, i, p);
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ms->len = p - ms->buf;
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WARN_ON(ms->len + sizeof(*ms) > 32768);
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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_csv_fops = {
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.owner = THIS_MODULE,
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.open = minstrel_ht_stats_csv_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", 0444, dir, msp,
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&minstrel_ht_stat_fops);
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msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, msp,
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&minstrel_ht_stat_csv_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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debugfs_remove(msp->dbg_stats_csv);
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}
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