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 } 320