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 ssize_t 19 minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos) 20 { 21 struct minstrel_debugfs_info *ms; 22 23 ms = file->private_data; 24 return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len); 25 } 26 27 static int 28 minstrel_stats_release(struct inode *inode, struct file *file) 29 { 30 kfree(file->private_data); 31 return 0; 32 } 33 34 static char * 35 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) 36 { 37 const struct mcs_group *mg; 38 unsigned int j, tp_max, tp_avg, eprob, tx_time; 39 char htmode = '2'; 40 char gimode = 'L'; 41 u32 gflags; 42 43 if (!mi->supported[i]) 44 return p; 45 46 mg = &minstrel_mcs_groups[i]; 47 gflags = mg->flags; 48 49 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) 50 htmode = '4'; 51 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) 52 htmode = '8'; 53 if (gflags & IEEE80211_TX_RC_SHORT_GI) 54 gimode = 'S'; 55 56 for (j = 0; j < MCS_GROUP_RATES; j++) { 57 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j]; 58 static const int bitrates[4] = { 10, 20, 55, 110 }; 59 int idx = i * MCS_GROUP_RATES + j; 60 unsigned int duration; 61 62 if (!(mi->supported[i] & BIT(j))) 63 continue; 64 65 if (gflags & IEEE80211_TX_RC_MCS) { 66 p += sprintf(p, "HT%c0 ", htmode); 67 p += sprintf(p, "%cGI ", gimode); 68 p += sprintf(p, "%d ", mg->streams); 69 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { 70 p += sprintf(p, "VHT%c0 ", htmode); 71 p += sprintf(p, "%cGI ", gimode); 72 p += sprintf(p, "%d ", mg->streams); 73 } else { 74 p += sprintf(p, "CCK "); 75 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S'); 76 p += sprintf(p, "1 "); 77 } 78 79 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; 80 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; 81 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; 82 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; 83 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; 84 85 if (gflags & IEEE80211_TX_RC_MCS) { 86 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j); 87 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { 88 p += sprintf(p, " MCS%-1u/%1u", j, mg->streams); 89 } else { 90 int r = bitrates[j % 4]; 91 92 p += sprintf(p, " %2u.%1uM", r / 10, r % 10); 93 } 94 95 p += sprintf(p, " %3u ", idx); 96 97 /* tx_time[rate(i)] in usec */ 98 duration = mg->duration[j]; 99 duration <<= mg->shift; 100 tx_time = DIV_ROUND_CLOSEST(duration, 1000); 101 p += sprintf(p, "%6u ", tx_time); 102 103 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); 104 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma); 105 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); 106 107 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u" 108 " %3u %3u %-3u " 109 "%9llu %-9llu\n", 110 tp_max / 10, tp_max % 10, 111 tp_avg / 10, tp_avg % 10, 112 eprob / 10, eprob % 10, 113 mrs->retry_count, 114 mrs->last_success, 115 mrs->last_attempts, 116 (unsigned long long)mrs->succ_hist, 117 (unsigned long long)mrs->att_hist); 118 } 119 120 return p; 121 } 122 123 static int 124 minstrel_ht_stats_open(struct inode *inode, struct file *file) 125 { 126 struct minstrel_ht_sta_priv *msp = inode->i_private; 127 struct minstrel_ht_sta *mi = &msp->ht; 128 struct minstrel_debugfs_info *ms; 129 unsigned int i; 130 int ret; 131 char *p; 132 133 if (!msp->is_ht) { 134 inode->i_private = &msp->legacy; 135 ret = minstrel_stats_open(inode, file); 136 inode->i_private = msp; 137 return ret; 138 } 139 140 ms = kmalloc(32768, GFP_KERNEL); 141 if (!ms) 142 return -ENOMEM; 143 144 file->private_data = ms; 145 p = ms->buf; 146 147 p += sprintf(p, "\n"); 148 p += sprintf(p, 149 " best ____________rate__________ ____statistics___ _____last____ ______sum-of________\n"); 150 p += sprintf(p, 151 "mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)] [retry|suc|att] [#success | #attempts]\n"); 152 153 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p); 154 for (i = 0; i < MINSTREL_CCK_GROUP; i++) 155 p = minstrel_ht_stats_dump(mi, i, p); 156 for (i++; i < ARRAY_SIZE(mi->groups); i++) 157 p = minstrel_ht_stats_dump(mi, i, p); 158 159 p += sprintf(p, "\nTotal packet count:: ideal %d " 160 "lookaround %d\n", 161 max(0, (int) mi->total_packets - (int) mi->sample_packets), 162 mi->sample_packets); 163 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n", 164 MINSTREL_TRUNC(mi->avg_ampdu_len), 165 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); 166 ms->len = p - ms->buf; 167 WARN_ON(ms->len + sizeof(*ms) > 32768); 168 169 return nonseekable_open(inode, file); 170 } 171 172 static const struct file_operations minstrel_ht_stat_fops = { 173 .owner = THIS_MODULE, 174 .open = minstrel_ht_stats_open, 175 .read = minstrel_stats_read, 176 .release = minstrel_stats_release, 177 .llseek = no_llseek, 178 }; 179 180 static char * 181 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p) 182 { 183 const struct mcs_group *mg; 184 unsigned int j, tp_max, tp_avg, eprob, tx_time; 185 char htmode = '2'; 186 char gimode = 'L'; 187 u32 gflags; 188 189 if (!mi->supported[i]) 190 return p; 191 192 mg = &minstrel_mcs_groups[i]; 193 gflags = mg->flags; 194 195 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) 196 htmode = '4'; 197 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) 198 htmode = '8'; 199 if (gflags & IEEE80211_TX_RC_SHORT_GI) 200 gimode = 'S'; 201 202 for (j = 0; j < MCS_GROUP_RATES; j++) { 203 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j]; 204 static const int bitrates[4] = { 10, 20, 55, 110 }; 205 int idx = i * MCS_GROUP_RATES + j; 206 unsigned int duration; 207 208 if (!(mi->supported[i] & BIT(j))) 209 continue; 210 211 if (gflags & IEEE80211_TX_RC_MCS) { 212 p += sprintf(p, "HT%c0,", htmode); 213 p += sprintf(p, "%cGI,", gimode); 214 p += sprintf(p, "%d,", mg->streams); 215 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { 216 p += sprintf(p, "VHT%c0,", htmode); 217 p += sprintf(p, "%cGI,", gimode); 218 p += sprintf(p, "%d,", mg->streams); 219 } else { 220 p += sprintf(p, "CCK,"); 221 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S'); 222 p += sprintf(p, "1,"); 223 } 224 225 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : "")); 226 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : "")); 227 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : "")); 228 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : "")); 229 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : "")); 230 231 if (gflags & IEEE80211_TX_RC_MCS) { 232 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j); 233 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { 234 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams); 235 } else { 236 int r = bitrates[j % 4]; 237 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10); 238 } 239 240 p += sprintf(p, "%u,", idx); 241 242 duration = mg->duration[j]; 243 duration <<= mg->shift; 244 tx_time = DIV_ROUND_CLOSEST(duration, 1000); 245 p += sprintf(p, "%u,", tx_time); 246 247 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); 248 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma); 249 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); 250 251 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u," 252 "%u,%llu,%llu,", 253 tp_max / 10, tp_max % 10, 254 tp_avg / 10, tp_avg % 10, 255 eprob / 10, eprob % 10, 256 mrs->retry_count, 257 mrs->last_success, 258 mrs->last_attempts, 259 (unsigned long long)mrs->succ_hist, 260 (unsigned long long)mrs->att_hist); 261 p += sprintf(p, "%d,%d,%d.%d\n", 262 max(0, (int) mi->total_packets - 263 (int) mi->sample_packets), 264 mi->sample_packets, 265 MINSTREL_TRUNC(mi->avg_ampdu_len), 266 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); 267 } 268 269 return p; 270 } 271 272 static int 273 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file) 274 { 275 struct minstrel_ht_sta_priv *msp = inode->i_private; 276 struct minstrel_ht_sta *mi = &msp->ht; 277 struct minstrel_debugfs_info *ms; 278 unsigned int i; 279 int ret; 280 char *p; 281 282 if (!msp->is_ht) { 283 inode->i_private = &msp->legacy; 284 ret = minstrel_stats_csv_open(inode, file); 285 inode->i_private = msp; 286 return ret; 287 } 288 289 ms = kmalloc(32768, GFP_KERNEL); 290 291 if (!ms) 292 return -ENOMEM; 293 294 file->private_data = ms; 295 296 p = ms->buf; 297 298 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p); 299 for (i = 0; i < MINSTREL_CCK_GROUP; i++) 300 p = minstrel_ht_stats_csv_dump(mi, i, p); 301 for (i++; i < ARRAY_SIZE(mi->groups); i++) 302 p = minstrel_ht_stats_csv_dump(mi, i, p); 303 304 ms->len = p - ms->buf; 305 WARN_ON(ms->len + sizeof(*ms) > 32768); 306 307 return nonseekable_open(inode, file); 308 } 309 310 static const struct file_operations minstrel_ht_stat_csv_fops = { 311 .owner = THIS_MODULE, 312 .open = minstrel_ht_stats_csv_open, 313 .read = minstrel_stats_read, 314 .release = minstrel_stats_release, 315 .llseek = no_llseek, 316 }; 317 318 void 319 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) 320 { 321 struct minstrel_ht_sta_priv *msp = priv_sta; 322 323 debugfs_create_file("rc_stats", 0444, dir, msp, 324 &minstrel_ht_stat_fops); 325 debugfs_create_file("rc_stats_csv", 0444, dir, msp, 326 &minstrel_ht_stat_csv_fops); 327 } 328