1 /* 2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #include <linux/netdevice.h> 9 #include <linux/types.h> 10 #include <linux/skbuff.h> 11 #include <linux/debugfs.h> 12 #include <linux/ieee80211.h> 13 #include <linux/export.h> 14 #include <net/mac80211.h> 15 #include "rc80211_minstrel.h" 16 #include "rc80211_minstrel_ht.h" 17 18 static int 19 minstrel_ht_stats_open(struct inode *inode, struct file *file) 20 { 21 struct minstrel_ht_sta_priv *msp = inode->i_private; 22 struct minstrel_ht_sta *mi = &msp->ht; 23 struct minstrel_debugfs_info *ms; 24 unsigned int i, j, tp, prob, eprob; 25 char *p; 26 int ret; 27 28 if (!msp->is_ht) { 29 inode->i_private = &msp->legacy; 30 ret = minstrel_stats_open(inode, file); 31 inode->i_private = msp; 32 return ret; 33 } 34 35 ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL); 36 if (!ms) 37 return -ENOMEM; 38 39 file->private_data = ms; 40 p = ms->buf; 41 p += sprintf(p, "type rate throughput ewma prob this prob " 42 "this succ/attempt success attempts\n"); 43 for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) { 44 char htmode = '2'; 45 char gimode = 'L'; 46 47 if (!mi->groups[i].supported) 48 continue; 49 50 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 51 htmode = '4'; 52 if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI) 53 gimode = 'S'; 54 55 for (j = 0; j < MCS_GROUP_RATES; j++) { 56 struct minstrel_rate_stats *mr = &mi->groups[i].rates[j]; 57 int idx = i * MCS_GROUP_RATES + j; 58 59 if (!(mi->groups[i].supported & BIT(j))) 60 continue; 61 62 p += sprintf(p, "HT%c0/%cGI ", htmode, gimode); 63 64 *(p++) = (idx == mi->max_tp_rate) ? 'T' : ' '; 65 *(p++) = (idx == mi->max_tp_rate2) ? 't' : ' '; 66 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; 67 p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].streams - 1) * 68 MCS_GROUP_RATES + j); 69 70 tp = mr->cur_tp / 10; 71 prob = MINSTREL_TRUNC(mr->cur_prob * 1000); 72 eprob = MINSTREL_TRUNC(mr->probability * 1000); 73 74 p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u " 75 "%3u(%3u) %8llu %8llu\n", 76 tp / 10, tp % 10, 77 eprob / 10, eprob % 10, 78 prob / 10, prob % 10, 79 mr->last_success, 80 mr->last_attempts, 81 (unsigned long long)mr->succ_hist, 82 (unsigned long long)mr->att_hist); 83 } 84 } 85 p += sprintf(p, "\nTotal packet count:: ideal %d " 86 "lookaround %d\n", 87 max(0, (int) mi->total_packets - (int) mi->sample_packets), 88 mi->sample_packets); 89 p += sprintf(p, "Average A-MPDU length: %d.%d\n", 90 MINSTREL_TRUNC(mi->avg_ampdu_len), 91 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); 92 ms->len = p - ms->buf; 93 94 return nonseekable_open(inode, file); 95 } 96 97 static const struct file_operations minstrel_ht_stat_fops = { 98 .owner = THIS_MODULE, 99 .open = minstrel_ht_stats_open, 100 .read = minstrel_stats_read, 101 .release = minstrel_stats_release, 102 .llseek = no_llseek, 103 }; 104 105 void 106 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) 107 { 108 struct minstrel_ht_sta_priv *msp = priv_sta; 109 110 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, 111 &minstrel_ht_stat_fops); 112 } 113 114 void 115 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) 116 { 117 struct minstrel_ht_sta_priv *msp = priv_sta; 118 119 debugfs_remove(msp->dbg_stats); 120 } 121