diff options
Diffstat (limited to 'kernel/net/mac80211/rc80211_minstrel_debugfs.c')
| -rw-r--r-- | kernel/net/mac80211/rc80211_minstrel_debugfs.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/kernel/net/mac80211/rc80211_minstrel_debugfs.c b/kernel/net/mac80211/rc80211_minstrel_debugfs.c new file mode 100644 index 000000000..1db5f7c33 --- /dev/null +++ b/kernel/net/mac80211/rc80211_minstrel_debugfs.c @@ -0,0 +1,234 @@ +/* + * Copyright (C) 2008 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. + * + * Based on minstrel.c: + * Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz> + * Sponsored by Indranet Technologies Ltd + * + * Based on sample.c: + * Copyright (c) 2005 John Bicket + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any + * redistribution must be conditioned upon including a substantially + * similar Disclaimer requirement for further binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, + * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGES. + */ +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/skbuff.h> +#include <linux/debugfs.h> +#include <linux/ieee80211.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <net/mac80211.h> +#include "rc80211_minstrel.h" + +ssize_t +minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos) +{ + struct minstrel_debugfs_info *ms; + + ms = file->private_data; + return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len); +} + +int +minstrel_stats_release(struct inode *inode, struct file *file) +{ + kfree(file->private_data); + return 0; +} + +int +minstrel_stats_open(struct inode *inode, struct file *file) +{ + struct minstrel_sta_info *mi = inode->i_private; + struct minstrel_debugfs_info *ms; + unsigned int i, tp_max, tp_avg, prob, eprob; + char *p; + + ms = kmalloc(2048, 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, "rate [name idx airtime max_tp] [ ø(tp) ø(prob) " + "sd(prob)] [prob.|retry|suc|att] " + "[#success | #attempts]\n"); + + for (i = 0; i < mi->n_rates; i++) { + struct minstrel_rate *mr = &mi->r[i]; + struct minstrel_rate_stats *mrs = &mi->r[i].stats; + + *(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' '; + *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' '; + *(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' '; + *(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' '; + *(p++) = (i == mi->max_prob_rate) ? 'P' : ' '; + + p += sprintf(p, " %3u%s ", mr->bitrate / 2, + (mr->bitrate & 1 ? ".5" : " ")); + p += sprintf(p, "%3u ", i); + p += sprintf(p, "%6u ", mr->perfect_tx_time); + + tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100)); + tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma); + prob = MINSTREL_TRUNC(mrs->cur_prob * 1000); + eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); + + p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u" + " %3u.%1u %3u %3u %-3u " + "%9llu %-9llu\n", + tp_max / 10, tp_max % 10, + tp_avg / 10, tp_avg % 10, + eprob / 10, eprob % 10, + mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 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, "\nTotal packet count:: ideal %d " + "lookaround %d\n\n", + mi->total_packets - mi->sample_packets, + mi->sample_packets); + ms->len = p - ms->buf; + + WARN_ON(ms->len + sizeof(*ms) > 2048); + + return 0; +} + +static const struct file_operations minstrel_stat_fops = { + .owner = THIS_MODULE, + .open = minstrel_stats_open, + .read = minstrel_stats_read, + .release = minstrel_stats_release, + .llseek = default_llseek, +}; + +int +minstrel_stats_csv_open(struct inode *inode, struct file *file) +{ + struct minstrel_sta_info *mi = inode->i_private; + struct minstrel_debugfs_info *ms; + unsigned int i, tp_max, tp_avg, prob, eprob; + char *p; + + ms = kmalloc(2048, GFP_KERNEL); + if (!ms) + return -ENOMEM; + + file->private_data = ms; + p = ms->buf; + + for (i = 0; i < mi->n_rates; i++) { + struct minstrel_rate *mr = &mi->r[i]; + struct minstrel_rate_stats *mrs = &mi->r[i].stats; + + p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : "")); + p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : "")); + p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : "")); + p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : "")); + p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : "")); + + p += sprintf(p, ",%u%s", mr->bitrate / 2, + (mr->bitrate & 1 ? ".5," : ",")); + p += sprintf(p, "%u,", i); + p += sprintf(p, "%u,",mr->perfect_tx_time); + + tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100)); + tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma); + 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.%u,%u,%u,%u," + "%llu,%llu,%d,%d\n", + tp_max / 10, tp_max % 10, + tp_avg / 10, tp_avg % 10, + eprob / 10, eprob % 10, + mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 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, + mi->total_packets - mi->sample_packets, + mi->sample_packets); + + } + ms->len = p - ms->buf; + + WARN_ON(ms->len + sizeof(*ms) > 2048); + + return 0; +} + +static const struct file_operations minstrel_stat_csv_fops = { + .owner = THIS_MODULE, + .open = minstrel_stats_csv_open, + .read = minstrel_stats_read, + .release = minstrel_stats_release, + .llseek = default_llseek, +}; + +void +minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) +{ + struct minstrel_sta_info *mi = priv_sta; + + mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi, + &minstrel_stat_fops); + + mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir, + mi, &minstrel_stat_csv_fops); +} + +void +minstrel_remove_sta_debugfs(void *priv, void *priv_sta) +{ + struct minstrel_sta_info *mi = priv_sta; + + debugfs_remove(mi->dbg_stats); + + debugfs_remove(mi->dbg_stats_csv); +} |