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