diff options
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht_debugfs.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht_debugfs.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c new file mode 100644 index 0000000..df44a5a --- /dev/null +++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c @@ -0,0 +1,146 @@ +/* + * 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) +{ + unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; + const struct mcs_group *mg; + unsigned int j, tp, prob, eprob; + char htmode = '2'; + char gimode = 'L'; + + if (!mi->groups[i].supported) + return p; + + mg = &minstrel_mcs_groups[i]; + if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + htmode = '4'; + if (mg->flags & 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 (i == max_mcs) + p += sprintf(p, "CCK/%cP ", j < 4 ? 'L' : 'S'); + else + p += sprintf(p, "HT%c0/%cGI ", htmode, gimode); + + *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' '; + *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' '; + *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; + + if (i == max_mcs) { + int r = bitrates[j % 4]; + p += sprintf(p, " %2u.%1uM", r / 10, r % 10); + } else { + p += sprintf(p, " MCS%-2u", (mg->streams - 1) * + MCS_GROUP_RATES + j); + } + + tp = mr->cur_tp / 10; + prob = MINSTREL_TRUNC(mr->cur_prob * 1000); + eprob = MINSTREL_TRUNC(mr->probability * 1000); + + p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u " + "%3u %3u(%3u) %8llu %8llu\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; + unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; + 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(sizeof(*ms) + 8192, GFP_KERNEL); + if (!ms) + return -ENOMEM; + + file->private_data = ms; + p = ms->buf; + p += sprintf(p, "type rate throughput ewma prob this prob " + "retry this succ/attempt success attempts\n"); + + p = minstrel_ht_stats_dump(mi, max_mcs, p); + for (i = 0; i < max_mcs; 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; + + 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); +} |