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 char * 19 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) 20 { 21 unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; 22 const struct mcs_group *mg; 23 unsigned int j, tp, prob, eprob; 24 char htmode = '2'; 25 char gimode = 'L'; 26 27 if (!mi->groups[i].supported) 28 return p; 29 30 mg = &minstrel_mcs_groups[i]; 31 if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 32 htmode = '4'; 33 if (mg->flags & IEEE80211_TX_RC_SHORT_GI) 34 gimode = 'S'; 35 36 for (j = 0; j < MCS_GROUP_RATES; j++) { 37 struct minstrel_rate_stats *mr = &mi->groups[i].rates[j]; 38 static const int bitrates[4] = { 10, 20, 55, 110 }; 39 int idx = i * MCS_GROUP_RATES + j; 40 41 if (!(mi->groups[i].supported & BIT(j))) 42 continue; 43 44 if (i == max_mcs) 45 p += sprintf(p, "CCK/%cP ", j < 4 ? 'L' : 'S'); 46 else 47 p += sprintf(p, "HT%c0/%cGI ", htmode, gimode); 48 49 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; 50 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; 51 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; 52 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; 53 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; 54 55 if (i == max_mcs) { 56 int r = bitrates[j % 4]; 57 p += sprintf(p, " %2u.%1uM", r / 10, r % 10); 58 } else { 59 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j); 60 } 61 62 tp = mr->cur_tp / 10; 63 prob = MINSTREL_TRUNC(mr->cur_prob * 1000); 64 eprob = MINSTREL_TRUNC(mr->probability * 1000); 65 66 p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u " 67 "%3u %4u(%4u) %9llu(%9llu)\n", 68 tp / 10, tp % 10, 69 eprob / 10, eprob % 10, 70 prob / 10, prob % 10, 71 mr->retry_count, 72 mr->last_success, 73 mr->last_attempts, 74 (unsigned long long)mr->succ_hist, 75 (unsigned long long)mr->att_hist); 76 } 77 78 return p; 79 } 80 81 static int 82 minstrel_ht_stats_open(struct inode *inode, struct file *file) 83 { 84 struct minstrel_ht_sta_priv *msp = inode->i_private; 85 struct minstrel_ht_sta *mi = &msp->ht; 86 struct minstrel_debugfs_info *ms; 87 unsigned int i; 88 unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; 89 char *p; 90 int ret; 91 92 if (!msp->is_ht) { 93 inode->i_private = &msp->legacy; 94 ret = minstrel_stats_open(inode, file); 95 inode->i_private = msp; 96 return ret; 97 } 98 99 ms = kmalloc(8192, GFP_KERNEL); 100 if (!ms) 101 return -ENOMEM; 102 103 file->private_data = ms; 104 p = ms->buf; 105 p += sprintf(p, "type rate tpt eprob *prob " 106 "ret *ok(*cum) ok( cum)\n"); 107 108 109 p = minstrel_ht_stats_dump(mi, max_mcs, p); 110 for (i = 0; i < max_mcs; i++) 111 p = minstrel_ht_stats_dump(mi, i, p); 112 113 p += sprintf(p, "\nTotal packet count:: ideal %d " 114 "lookaround %d\n", 115 max(0, (int) mi->total_packets - (int) mi->sample_packets), 116 mi->sample_packets); 117 p += sprintf(p, "Average A-MPDU length: %d.%d\n", 118 MINSTREL_TRUNC(mi->avg_ampdu_len), 119 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); 120 ms->len = p - ms->buf; 121 122 WARN_ON(ms->len + sizeof(*ms) > 8192); 123 124 return nonseekable_open(inode, file); 125 } 126 127 static const struct file_operations minstrel_ht_stat_fops = { 128 .owner = THIS_MODULE, 129 .open = minstrel_ht_stats_open, 130 .read = minstrel_stats_read, 131 .release = minstrel_stats_release, 132 .llseek = no_llseek, 133 }; 134 135 void 136 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) 137 { 138 struct minstrel_ht_sta_priv *msp = priv_sta; 139 140 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, 141 &minstrel_ht_stat_fops); 142 } 143 144 void 145 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) 146 { 147 struct minstrel_ht_sta_priv *msp = priv_sta; 148 149 debugfs_remove(msp->dbg_stats); 150 } 151