net/mac80211/rc80211_minstrel_ht_debugfs.c

   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_max, tp_avg, prob, eprob, tx_time;
  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 *mrs = &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  ", htmode);
  50                         p += sprintf(p, "%cGI  ", gimode);
  51                         p += sprintf(p, "%d  ", mg->streams);
  52                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
  53                         p += sprintf(p, "VHT%c0 ", htmode);
  54                         p += sprintf(p, "%cGI ", gimode);
  55                         p += sprintf(p, "%d  ", mg->streams);
  56                 } else {
  57                         p += sprintf(p, "CCK    ");
  58                         p += sprintf(p, "%cP  ", j < 4 ? 'L' : 'S');
  59                         p += sprintf(p, "1 ");
  60                 }
  61
  62                 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
  63                 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
  64                 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
  65                 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
  66                 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
  67
  68                 if (gflags & IEEE80211_TX_RC_MCS) {
  69                         p += sprintf(p, "  MCS%-2u", (mg->streams - 1) * 8 + j);
  70                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
  71                         p += sprintf(p, "  MCS%-1u/%1u", j, mg->streams);
  72                 } else {
  73                         int r = bitrates[j % 4];
  74
  75                         p += sprintf(p, "   %2u.%1uM", r / 10, r % 10);
  76                 }
  77
  78                 p += sprintf(p, "  %3u  ", idx);
  79
  80                 /* tx_time[rate(i)] in usec */
  81                 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
  82                 p += sprintf(p, "%6u  ", tx_time);
  83
  84                 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
  85                 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
  86                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
  87                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
  88
  89                 p += sprintf(p, "%4u.%1u    %4u.%1u     %3u.%1u    %3u.%1u"
  90                                 "     %3u.%1u %3u   %3u %-3u   "
  91                                 "%9llu   %-9llu\n",
  92                                 tp_max / 10, tp_max % 10,
  93                                 tp_avg / 10, tp_avg % 10,
  94                                 eprob / 10, eprob % 10,
  95                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
  96                                 prob / 10, prob % 10,
  97                                 mrs->retry_count,
  98                                 mrs->last_success,
  99                                 mrs->last_attempts,
 100                                 (unsigned long long)mrs->succ_hist,
 101                                 (unsigned long long)mrs->att_hist);
 102         }
 103
 104         return p;
 105 }
 106
 107 static int
 108 minstrel_ht_stats_open(struct inode *inode, struct file *file)
 109 {
 110         struct minstrel_ht_sta_priv *msp = inode->i_private;
 111         struct minstrel_ht_sta *mi = &msp->ht;
 112         struct minstrel_debugfs_info *ms;
 113         unsigned int i;
 114         int ret;
 115         char *p;
 116
 117         if (!msp->is_ht) {
 118                 inode->i_private = &msp->legacy;
 119                 ret = minstrel_stats_open(inode, file);
 120                 inode->i_private = msp;
 121                 return ret;
 122         }
 123
 124         ms = kmalloc(32768, GFP_KERNEL);
 125         if (!ms)
 126                 return -ENOMEM;
 127
 128         file->private_data = ms;
 129         p = ms->buf;
 130
 131         p += sprintf(p, "\n");
 132         p += sprintf(p,
 133                      "              best   ____________rate__________    ________statistics________    ________last_______    ______sum-of________\n");
 134         p += sprintf(p,
 135                      "mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
 136
 137         p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
 138         for (i = 0; i < MINSTREL_CCK_GROUP; i++)
 139                 p = minstrel_ht_stats_dump(mi, i, p);
 140         for (i++; i < ARRAY_SIZE(mi->groups); i++)
 141                 p = minstrel_ht_stats_dump(mi, i, p);
 142
 143         p += sprintf(p, "\nTotal packet count::    ideal %d      "
 144                         "lookaround %d\n",
 145                         max(0, (int) mi->total_packets - (int) mi->sample_packets),
 146                         mi->sample_packets);
 147         p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
 148                 MINSTREL_TRUNC(mi->avg_ampdu_len),
 149                 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
 150         ms->len = p - ms->buf;
 151         WARN_ON(ms->len + sizeof(*ms) > 32768);
 152
 153         return nonseekable_open(inode, file);
 154 }
 155
 156 static const struct file_operations minstrel_ht_stat_fops = {
 157         .owner = THIS_MODULE,
 158         .open = minstrel_ht_stats_open,
 159         .read = minstrel_stats_read,
 160         .release = minstrel_stats_release,
 161         .llseek = no_llseek,
 162 };
 163
 164 static char *
 165 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
 166 {
 167         const struct mcs_group *mg;
 168         unsigned int j, tp_max, tp_avg, prob, eprob, tx_time;
 169         char htmode = '2';
 170         char gimode = 'L';
 171         u32 gflags;
 172
 173         if (!mi->groups[i].supported)
 174                 return p;
 175
 176         mg = &minstrel_mcs_groups[i];
 177         gflags = mg->flags;
 178
 179         if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 180                 htmode = '4';
 181         else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 182                 htmode = '8';
 183         if (gflags & IEEE80211_TX_RC_SHORT_GI)
 184                 gimode = 'S';
 185
 186         for (j = 0; j < MCS_GROUP_RATES; j++) {
 187                 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
 188                 static const int bitrates[4] = { 10, 20, 55, 110 };
 189                 int idx = i * MCS_GROUP_RATES + j;
 190
 191                 if (!(mi->groups[i].supported & BIT(j)))
 192                         continue;
 193
 194                 if (gflags & IEEE80211_TX_RC_MCS) {
 195                         p += sprintf(p, "HT%c0,", htmode);
 196                         p += sprintf(p, "%cGI,", gimode);
 197                         p += sprintf(p, "%d,", mg->streams);
 198                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
 199                         p += sprintf(p, "VHT%c0,", htmode);
 200                         p += sprintf(p, "%cGI,", gimode);
 201                         p += sprintf(p, "%d,", mg->streams);
 202                 } else {
 203                         p += sprintf(p, "CCK,");
 204                         p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
 205                         p += sprintf(p, "1,");
 206                 }
 207
 208                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
 209                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
 210                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
 211                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
 212                 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
 213
 214                 if (gflags & IEEE80211_TX_RC_MCS) {
 215                         p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
 216                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
 217                         p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
 218                 } else {
 219                         int r = bitrates[j % 4];
 220                         p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
 221                 }
 222
 223                 p += sprintf(p, "%u,", idx);
 224                 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
 225                 p += sprintf(p, "%u,", tx_time);
 226
 227                 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
 228                 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
 229                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
 230                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
 231
 232                 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,"
 233                                 "%u,%llu,%llu,",
 234                                 tp_max / 10, tp_max % 10,
 235                                 tp_avg / 10, tp_avg % 10,
 236                                 eprob / 10, eprob % 10,
 237                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
 238                                 prob / 10, prob % 10,
 239                                 mrs->retry_count,
 240                                 mrs->last_success,
 241                                 mrs->last_attempts,
 242                                 (unsigned long long)mrs->succ_hist,
 243                                 (unsigned long long)mrs->att_hist);
 244                 p += sprintf(p, "%d,%d,%d.%d\n",
 245                                 max(0, (int) mi->total_packets -
 246                                 (int) mi->sample_packets),
 247                                 mi->sample_packets,
 248                                 MINSTREL_TRUNC(mi->avg_ampdu_len),
 249                                 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
 250         }
 251
 252         return p;
 253 }
 254
 255 static int
 256 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
 257 {
 258         struct minstrel_ht_sta_priv *msp = inode->i_private;
 259         struct minstrel_ht_sta *mi = &msp->ht;
 260         struct minstrel_debugfs_info *ms;
 261         unsigned int i;
 262         int ret;
 263         char *p;
 264
 265         if (!msp->is_ht) {
 266                 inode->i_private = &msp->legacy;
 267                 ret = minstrel_stats_csv_open(inode, file);
 268                 inode->i_private = msp;
 269                 return ret;
 270         }
 271
 272         ms = kmalloc(32768, GFP_KERNEL);
 273
 274         if (!ms)
 275                 return -ENOMEM;
 276
 277         file->private_data = ms;
 278
 279         p = ms->buf;
 280
 281         p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
 282         for (i = 0; i < MINSTREL_CCK_GROUP; i++)
 283                 p = minstrel_ht_stats_csv_dump(mi, i, p);
 284         for (i++; i < ARRAY_SIZE(mi->groups); i++)
 285                 p = minstrel_ht_stats_csv_dump(mi, i, p);
 286
 287         ms->len = p - ms->buf;
 288         WARN_ON(ms->len + sizeof(*ms) > 32768);
 289
 290         return nonseekable_open(inode, file);
 291 }
 292
 293 static const struct file_operations minstrel_ht_stat_csv_fops = {
 294         .owner = THIS_MODULE,
 295         .open = minstrel_ht_stats_csv_open,
 296         .read = minstrel_stats_read,
 297         .release = minstrel_stats_release,
 298         .llseek = no_llseek,
 299 };
 300
 301 void
 302 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
 303 {
 304         struct minstrel_ht_sta_priv *msp = priv_sta;
 305
 306         msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
 307                         &minstrel_ht_stat_fops);
 308         msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO,
 309                              dir, msp, &minstrel_ht_stat_csv_fops);
 310 }
 311
 312 void
 313 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
 314 {
 315         struct minstrel_ht_sta_priv *msp = priv_sta;
 316
 317         debugfs_remove(msp->dbg_stats);
 318         debugfs_remove(msp->dbg_stats_csv);
 319 }