146 lines
3.8 KiB
C
146 lines
3.8 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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unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
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const struct mcs_group *mg;
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unsigned int j, tp, prob, eprob;
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char htmode = '2';
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char gimode = 'L';
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if (!mi->groups[i].supported)
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return p;
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mg = &minstrel_mcs_groups[i];
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if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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htmode = '4';
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if (mg->flags & 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 *mr = &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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if (!(mi->groups[i].supported & BIT(j)))
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continue;
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if (i == max_mcs)
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p += sprintf(p, "CCK/%cP ", j < 4 ? 'L' : 'S');
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else
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p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
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*(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
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*(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
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*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
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if (i == max_mcs) {
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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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} else {
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p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
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}
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tp = mr->cur_tp / 10;
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prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
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eprob = MINSTREL_TRUNC(mr->probability * 1000);
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p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
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"%3u %3u(%3u) %8llu %8llu\n",
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tp / 10, tp % 10,
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eprob / 10, eprob % 10,
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prob / 10, prob % 10,
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mr->retry_count,
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mr->last_success,
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mr->last_attempts,
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(unsigned long long)mr->succ_hist,
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(unsigned long long)mr->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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unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
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char *p;
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int ret;
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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(sizeof(*ms) + 8192, 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, "type rate throughput ewma prob this prob "
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"retry this succ/attempt success attempts\n");
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p = minstrel_ht_stats_dump(mi, max_mcs, p);
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for (i = 0; i < max_mcs; 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 A-MPDU length: %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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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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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", S_IRUGO, dir, msp,
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&minstrel_ht_stat_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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}
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