net/mac80211/rc80211_minstrel_ht_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
   4  */
   5 #include <linux/netdevice.h>
   6 #include <linux/types.h>
   7 #include <linux/skbuff.h>
   8 #include <linux/debugfs.h>
   9 #include <linux/ieee80211.h>
  10 #include <linux/export.h>
  11 #include <net/mac80211.h>
  12 #include "rc80211_minstrel.h"
  13 #include "rc80211_minstrel_ht.h"
  14
  15 static ssize_t
  16 minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
  17 {
  18         struct minstrel_debugfs_info *ms;
  19
  20         ms = file->private_data;
  21         return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
  22 }
  23
  24 static int
  25 minstrel_stats_release(struct inode *inode, struct file *file)
  26 {
  27         kfree(file->private_data);
  28         return 0;
  29 }
  30
  31 static char *
  32 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
  33 {
  34         const struct mcs_group *mg;
  35         unsigned int j, tp_max, tp_avg, eprob, tx_time;
  36         char htmode = '2';
  37         char gimode = 'L';
  38         u32 gflags;
  39
  40         if (!mi->supported[i])
  41                 return p;
  42
  43         mg = &minstrel_mcs_groups[i];
  44         gflags = mg->flags;
  45
  46         if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
  47                 htmode = '4';
  48         else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
  49                 htmode = '8';
  50         if (gflags & IEEE80211_TX_RC_SHORT_GI)
  51                 gimode = 'S';
  52
  53         for (j = 0; j < MCS_GROUP_RATES; j++) {
  54                 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
  55                 static const int bitrates[4] = { 10, 20, 55, 110 };
  56                 int idx = i * MCS_GROUP_RATES + j;
  57                 unsigned int duration;
  58
  59                 if (!(mi->supported[i] & BIT(j)))
  60                         continue;
  61
  62                 if (gflags & IEEE80211_TX_RC_MCS) {
  63                         p += sprintf(p, "HT%c0  ", htmode);
  64                         p += sprintf(p, "%cGI  ", gimode);
  65                         p += sprintf(p, "%d  ", mg->streams);
  66                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
  67                         p += sprintf(p, "VHT%c0 ", htmode);
  68                         p += sprintf(p, "%cGI ", gimode);
  69                         p += sprintf(p, "%d  ", mg->streams);
  70                 } else {
  71                         p += sprintf(p, "CCK    ");
  72                         p += sprintf(p, "%cP  ", j < 4 ? 'L' : 'S');
  73                         p += sprintf(p, "1 ");
  74                 }
  75
  76                 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
  77                 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
  78                 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
  79                 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
  80                 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
  81
  82                 if (gflags & IEEE80211_TX_RC_MCS) {
  83                         p += sprintf(p, "  MCS%-2u", (mg->streams - 1) * 8 + j);
  84                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
  85                         p += sprintf(p, "  MCS%-1u/%1u", j, mg->streams);
  86                 } else {
  87                         int r = bitrates[j % 4];
  88
  89                         p += sprintf(p, "   %2u.%1uM", r / 10, r % 10);
  90                 }
  91
  92                 p += sprintf(p, "  %3u  ", idx);
  93
  94                 /* tx_time[rate(i)] in usec */
  95                 duration = mg->duration[j];
  96                 duration <<= mg->shift;
  97                 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
  98                 p += sprintf(p, "%6u  ", tx_time);
  99
 100                 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
 101                 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
 102                 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
 103
 104                 p += sprintf(p, "%4u.%1u    %4u.%1u     %3u.%1u"
 105                                 "     %3u   %3u %-3u   "
 106                                 "%9llu   %-9llu\n",
 107                                 tp_max / 10, tp_max % 10,
 108                                 tp_avg / 10, tp_avg % 10,
 109                                 eprob / 10, eprob % 10,
 110                                 mrs->retry_count,
 111                                 mrs->last_success,
 112                                 mrs->last_attempts,
 113                                 (unsigned long long)mrs->succ_hist,
 114                                 (unsigned long long)mrs->att_hist);
 115         }
 116
 117         return p;
 118 }
 119
 120 static int
 121 minstrel_ht_stats_open(struct inode *inode, struct file *file)
 122 {
 123         struct minstrel_ht_sta_priv *msp = inode->i_private;
 124         struct minstrel_ht_sta *mi = &msp->ht;
 125         struct minstrel_debugfs_info *ms;
 126         unsigned int i;
 127         int ret;
 128         char *p;
 129
 130         if (!msp->is_ht) {
 131                 inode->i_private = &msp->legacy;
 132                 ret = minstrel_stats_open(inode, file);
 133                 inode->i_private = msp;
 134                 return ret;
 135         }
 136
 137         ms = kmalloc(32768, GFP_KERNEL);
 138         if (!ms)
 139                 return -ENOMEM;
 140
 141         file->private_data = ms;
 142         p = ms->buf;
 143
 144         p += sprintf(p, "\n");
 145         p += sprintf(p,
 146                      "              best   ____________rate__________    ____statistics___    _____last____    ______sum-of________\n");
 147         p += sprintf(p,
 148                      "mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob)]  [retry|suc|att]  [#success | #attempts]\n");
 149
 150         p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
 151         for (i = 0; i < MINSTREL_CCK_GROUP; i++)
 152                 p = minstrel_ht_stats_dump(mi, i, p);
 153         for (i++; i < ARRAY_SIZE(mi->groups); i++)
 154                 p = minstrel_ht_stats_dump(mi, i, p);
 155
 156         p += sprintf(p, "\nTotal packet count::    ideal %d      "
 157                         "lookaround %d\n",
 158                         max(0, (int) mi->total_packets - (int) mi->sample_packets),
 159                         mi->sample_packets);
 160         if (mi->avg_ampdu_len)
 161                 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
 162                         MINSTREL_TRUNC(mi->avg_ampdu_len),
 163                         MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
 164         ms->len = p - ms->buf;
 165         WARN_ON(ms->len + sizeof(*ms) > 32768);
 166
 167         return nonseekable_open(inode, file);
 168 }
 169
 170 static const struct file_operations minstrel_ht_stat_fops = {
 171         .owner = THIS_MODULE,
 172         .open = minstrel_ht_stats_open,
 173         .read = minstrel_stats_read,
 174         .release = minstrel_stats_release,
 175         .llseek = no_llseek,
 176 };
 177
 178 static char *
 179 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
 180 {
 181         const struct mcs_group *mg;
 182         unsigned int j, tp_max, tp_avg, eprob, tx_time;
 183         char htmode = '2';
 184         char gimode = 'L';
 185         u32 gflags;
 186
 187         if (!mi->supported[i])
 188                 return p;
 189
 190         mg = &minstrel_mcs_groups[i];
 191         gflags = mg->flags;
 192
 193         if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 194                 htmode = '4';
 195         else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 196                 htmode = '8';
 197         if (gflags & IEEE80211_TX_RC_SHORT_GI)
 198                 gimode = 'S';
 199
 200         for (j = 0; j < MCS_GROUP_RATES; j++) {
 201                 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
 202                 static const int bitrates[4] = { 10, 20, 55, 110 };
 203                 int idx = i * MCS_GROUP_RATES + j;
 204                 unsigned int duration;
 205
 206                 if (!(mi->supported[i] & BIT(j)))
 207                         continue;
 208
 209                 if (gflags & IEEE80211_TX_RC_MCS) {
 210                         p += sprintf(p, "HT%c0,", htmode);
 211                         p += sprintf(p, "%cGI,", gimode);
 212                         p += sprintf(p, "%d,", mg->streams);
 213                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
 214                         p += sprintf(p, "VHT%c0,", htmode);
 215                         p += sprintf(p, "%cGI,", gimode);
 216                         p += sprintf(p, "%d,", mg->streams);
 217                 } else {
 218                         p += sprintf(p, "CCK,");
 219                         p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
 220                         p += sprintf(p, "1,");
 221                 }
 222
 223                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
 224                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
 225                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
 226                 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
 227                 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
 228
 229                 if (gflags & IEEE80211_TX_RC_MCS) {
 230                         p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
 231                 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
 232                         p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
 233                 } else {
 234                         int r = bitrates[j % 4];
 235                         p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
 236                 }
 237
 238                 p += sprintf(p, "%u,", idx);
 239
 240                 duration = mg->duration[j];
 241                 duration <<= mg->shift;
 242                 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
 243                 p += sprintf(p, "%u,", tx_time);
 244
 245                 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
 246                 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
 247                 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
 248
 249                 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
 250                                 "%u,%llu,%llu,",
 251                                 tp_max / 10, tp_max % 10,
 252                                 tp_avg / 10, tp_avg % 10,
 253                                 eprob / 10, eprob % 10,
 254                                 mrs->retry_count,
 255                                 mrs->last_success,
 256                                 mrs->last_attempts,
 257                                 (unsigned long long)mrs->succ_hist,
 258                                 (unsigned long long)mrs->att_hist);
 259                 p += sprintf(p, "%d,%d,%d.%d\n",
 260                                 max(0, (int) mi->total_packets -
 261                                 (int) mi->sample_packets),
 262                                 mi->sample_packets,
 263                                 MINSTREL_TRUNC(mi->avg_ampdu_len),
 264                                 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
 265         }
 266
 267         return p;
 268 }
 269
 270 static int
 271 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
 272 {
 273         struct minstrel_ht_sta_priv *msp = inode->i_private;
 274         struct minstrel_ht_sta *mi = &msp->ht;
 275         struct minstrel_debugfs_info *ms;
 276         unsigned int i;
 277         int ret;
 278         char *p;
 279
 280         if (!msp->is_ht) {
 281                 inode->i_private = &msp->legacy;
 282                 ret = minstrel_stats_csv_open(inode, file);
 283                 inode->i_private = msp;
 284                 return ret;
 285         }
 286
 287         ms = kmalloc(32768, GFP_KERNEL);
 288
 289         if (!ms)
 290                 return -ENOMEM;
 291
 292         file->private_data = ms;
 293
 294         p = ms->buf;
 295
 296         p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
 297         for (i = 0; i < MINSTREL_CCK_GROUP; i++)
 298                 p = minstrel_ht_stats_csv_dump(mi, i, p);
 299         for (i++; i < ARRAY_SIZE(mi->groups); i++)
 300                 p = minstrel_ht_stats_csv_dump(mi, i, p);
 301
 302         ms->len = p - ms->buf;
 303         WARN_ON(ms->len + sizeof(*ms) > 32768);
 304
 305         return nonseekable_open(inode, file);
 306 }
 307
 308 static const struct file_operations minstrel_ht_stat_csv_fops = {
 309         .owner = THIS_MODULE,
 310         .open = minstrel_ht_stats_csv_open,
 311         .read = minstrel_stats_read,
 312         .release = minstrel_stats_release,
 313         .llseek = no_llseek,
 314 };
 315
 316 void
 317 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
 318 {
 319         struct minstrel_ht_sta_priv *msp = priv_sta;
 320
 321         debugfs_create_file("rc_stats", 0444, dir, msp,
 322                             &minstrel_ht_stat_fops);
 323         debugfs_create_file("rc_stats_csv", 0444, dir, msp,
 324                             &minstrel_ht_stat_csv_fops);
 325 }