/* * 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 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, j, tp, prob, eprob; 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 " "this succ/attempt success attempts\n"); for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) { char htmode = '2'; char gimode = 'L'; if (!mi->groups[i].supported) continue; if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) htmode = '4'; if (minstrel_mcs_groups[i].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]; int idx = i * MCS_GROUP_RATES + j; if (!(mi->groups[i].supported & BIT(j))) continue; 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' : ' '; p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].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) %8llu %8llu\n", tp / 10, tp % 10, eprob / 10, eprob % 10, prob / 10, prob % 10, mr->last_success, mr->last_attempts, (unsigned long long)mr->succ_hist, (unsigned long long)mr->att_hist); } } 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); }