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 const struct mcs_group *mg; 22 unsigned int j, tp, prob, eprob; 23 char htmode = '2'; 24 char gimode = 'L'; 25 u32 gflags; 26 27 if (!mi->groups[i].supported) 28 return p; 29 30 mg = &minstrel_mcs_groups[i]; 31 gflags = mg->flags; 32 33 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) 34 htmode = '4'; 35 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) 36 htmode = '8'; 37 if (gflags & IEEE80211_TX_RC_SHORT_GI) 38 gimode = 'S'; 39 40 for (j = 0; j < MCS_GROUP_RATES; j++) { 41 struct minstrel_rate_stats *mr = &mi->groups[i].rates[j]; 42 static const int bitrates[4] = { 10, 20, 55, 110 }; 43 int idx = i * MCS_GROUP_RATES + j; 44 45 if (!(mi->groups[i].supported & BIT(j))) 46 continue; 47 48 if (gflags & IEEE80211_TX_RC_MCS) 49 p += sprintf(p, " HT%c0/%cGI ", htmode, gimode); 50 else if (gflags & IEEE80211_TX_RC_VHT_MCS) 51 p += sprintf(p, "VHT%c0/%cGI ", htmode, gimode); 52 else 53 p += sprintf(p, " CCK/%cP ", j < 4 ? 'L' : 'S'); 54 55 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; 56 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; 57 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; 58 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; 59 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; 60 61 if (gflags & IEEE80211_TX_RC_MCS) { 62 p += sprintf(p, " MCS%-2u ", (mg->streams - 1) * 8 + j); 63 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { 64 p += sprintf(p, " MCS%-1u/%1u", j, mg->streams); 65 } else { 66 int r = bitrates[j % 4]; 67 68 p += sprintf(p, " %2u.%1uM ", r / 10, r % 10); 69 } 70 71 tp = mr->cur_tp / 10; 72 prob = MINSTREL_TRUNC(mr->cur_prob * 1000); 73 eprob = MINSTREL_TRUNC(mr->probability * 1000); 74 75 p += sprintf(p, " %4u.%1u %3u.%1u %3u.%1u " 76 "%3u %4u(%4u) %9llu(%9llu)\n", 77 tp / 10, tp % 10, 78 eprob / 10, eprob % 10, 79 prob / 10, prob % 10, 80 mr->retry_count, 81 mr->last_success, 82 mr->last_attempts, 83 (unsigned long long)mr->succ_hist, 84 (unsigned long long)mr->att_hist); 85 } 86 87 return p; 88 } 89 90 static int 91 minstrel_ht_stats_open(struct inode *inode, struct file *file) 92 { 93 struct minstrel_ht_sta_priv *msp = inode->i_private; 94 struct minstrel_ht_sta *mi = &msp->ht; 95 struct minstrel_debugfs_info *ms; 96 unsigned int i; 97 char *p; 98 int ret; 99 100 if (!msp->is_ht) { 101 inode->i_private = &msp->legacy; 102 ret = minstrel_stats_open(inode, file); 103 inode->i_private = msp; 104 return ret; 105 } 106 107 ms = kmalloc(32768, GFP_KERNEL); 108 if (!ms) 109 return -ENOMEM; 110 111 file->private_data = ms; 112 p = ms->buf; 113 p += sprintf(p, " type rate tpt eprob *prob " 114 "ret *ok(*cum) ok( cum)\n"); 115 116 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p); 117 for (i = 0; i < MINSTREL_CCK_GROUP; i++) 118 p = minstrel_ht_stats_dump(mi, i, p); 119 for (i++; i < ARRAY_SIZE(mi->groups); i++) 120 p = minstrel_ht_stats_dump(mi, i, p); 121 122 p += sprintf(p, "\nTotal packet count:: ideal %d " 123 "lookaround %d\n", 124 max(0, (int) mi->total_packets - (int) mi->sample_packets), 125 mi->sample_packets); 126 p += sprintf(p, "Average A-MPDU length: %d.%d\n", 127 MINSTREL_TRUNC(mi->avg_ampdu_len), 128 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); 129 ms->len = p - ms->buf; 130 131 WARN_ON(ms->len + sizeof(*ms) > 32768); 132 133 return nonseekable_open(inode, file); 134 } 135 136 static const struct file_operations minstrel_ht_stat_fops = { 137 .owner = THIS_MODULE, 138 .open = minstrel_ht_stats_open, 139 .read = minstrel_stats_read, 140 .release = minstrel_stats_release, 141 .llseek = no_llseek, 142 }; 143 144 void 145 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) 146 { 147 struct minstrel_ht_sta_priv *msp = priv_sta; 148 149 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp, 150 &minstrel_ht_stat_fops); 151 } 152 153 void 154 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta) 155 { 156 struct minstrel_ht_sta_priv *msp = priv_sta; 157 158 debugfs_remove(msp->dbg_stats); 159 } 160