2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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.
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"
19 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
21 const struct mcs_group *mg;
22 unsigned int j, tp_avg, prob, eprob, tx_time;
27 if (!mi->groups[i].supported)
30 mg = &minstrel_mcs_groups[i];
33 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
35 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
37 if (gflags & IEEE80211_TX_RC_SHORT_GI)
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;
45 if (!(mi->groups[i].supported & BIT(j)))
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);
57 p += sprintf(p, "CCK ");
58 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
59 p += sprintf(p, "1 ");
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' : ' ';
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);
73 int r = bitrates[j % 4];
75 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
78 p += sprintf(p, " %3u ", idx);
80 /* tx_time[rate(i)] in usec */
81 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
82 p += sprintf(p, "%6u ", tx_time);
84 tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
85 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
86 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
88 p += sprintf(p, "%4u.%1u %3u.%1u %3u.%1u "
89 "%3u %3u %-3u %9llu %-9llu\n",
90 tp_avg / 10, tp_avg % 10,
91 eprob / 10, eprob % 10,
96 (unsigned long long)mrs->succ_hist,
97 (unsigned long long)mrs->att_hist);
104 minstrel_ht_stats_open(struct inode *inode, struct file *file)
106 struct minstrel_ht_sta_priv *msp = inode->i_private;
107 struct minstrel_ht_sta *mi = &msp->ht;
108 struct minstrel_debugfs_info *ms;
114 inode->i_private = &msp->legacy;
115 ret = minstrel_stats_open(inode, file);
116 inode->i_private = msp;
120 ms = kmalloc(32768, GFP_KERNEL);
124 file->private_data = ms;
127 p += sprintf(p, "\n");
128 p += sprintf(p, " best ________rate______ "
129 "__statistics__ ________last_______ "
130 "______sum-of________\n");
131 p += sprintf(p, "mode guard # rate [name idx airtime] [ ø(tp) "
132 "ø(prob)] [prob.|retry|suc|att] [#success | "
135 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
136 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
137 p = minstrel_ht_stats_dump(mi, i, p);
138 for (i++; i < ARRAY_SIZE(mi->groups); i++)
139 p = minstrel_ht_stats_dump(mi, i, p);
141 p += sprintf(p, "\nTotal packet count:: ideal %d "
143 max(0, (int) mi->total_packets - (int) mi->sample_packets),
145 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
146 MINSTREL_TRUNC(mi->avg_ampdu_len),
147 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
148 ms->len = p - ms->buf;
149 WARN_ON(ms->len + sizeof(*ms) > 32768);
151 return nonseekable_open(inode, file);
154 static const struct file_operations minstrel_ht_stat_fops = {
155 .owner = THIS_MODULE,
156 .open = minstrel_ht_stats_open,
157 .read = minstrel_stats_read,
158 .release = minstrel_stats_release,
163 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
165 const struct mcs_group *mg;
166 unsigned int j, tp_avg, prob, eprob, tx_time;
171 if (!mi->groups[i].supported)
174 mg = &minstrel_mcs_groups[i];
177 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
179 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
181 if (gflags & IEEE80211_TX_RC_SHORT_GI)
184 for (j = 0; j < MCS_GROUP_RATES; j++) {
185 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
186 static const int bitrates[4] = { 10, 20, 55, 110 };
187 int idx = i * MCS_GROUP_RATES + j;
189 if (!(mi->groups[i].supported & BIT(j)))
192 if (gflags & IEEE80211_TX_RC_MCS) {
193 p += sprintf(p, "HT%c0,", htmode);
194 p += sprintf(p, "%cGI,", gimode);
195 p += sprintf(p, "%d,", mg->streams);
196 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
197 p += sprintf(p, "VHT%c0,", htmode);
198 p += sprintf(p, "%cGI,", gimode);
199 p += sprintf(p, "%d,", mg->streams);
201 p += sprintf(p, "CCK,");
202 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
203 p += sprintf(p, "1,");
206 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
207 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
208 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
209 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
210 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
212 if (gflags & IEEE80211_TX_RC_MCS) {
213 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
214 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
215 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
217 int r = bitrates[j % 4];
218 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
221 p += sprintf(p, "%u,", idx);
222 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
223 p += sprintf(p, "%u,", tx_time);
225 tp_avg = minstrel_ht_get_tp_avg(mi, i, j);
226 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
227 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
229 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,%llu,%llu,",
230 tp_avg / 10, tp_avg % 10,
231 eprob / 10, eprob % 10,
232 prob / 10, prob % 10,
236 (unsigned long long)mrs->succ_hist,
237 (unsigned long long)mrs->att_hist);
238 p += sprintf(p, "%d,%d,%d.%d\n",
239 max(0, (int) mi->total_packets -
240 (int) mi->sample_packets),
242 MINSTREL_TRUNC(mi->avg_ampdu_len),
243 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
250 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
252 struct minstrel_ht_sta_priv *msp = inode->i_private;
253 struct minstrel_ht_sta *mi = &msp->ht;
254 struct minstrel_debugfs_info *ms;
260 inode->i_private = &msp->legacy;
261 ret = minstrel_stats_csv_open(inode, file);
262 inode->i_private = msp;
266 ms = kmalloc(32768, GFP_KERNEL);
271 file->private_data = ms;
275 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
276 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
277 p = minstrel_ht_stats_csv_dump(mi, i, p);
278 for (i++; i < ARRAY_SIZE(mi->groups); i++)
279 p = minstrel_ht_stats_csv_dump(mi, i, p);
281 ms->len = p - ms->buf;
282 WARN_ON(ms->len + sizeof(*ms) > 32768);
284 return nonseekable_open(inode, file);
287 static const struct file_operations minstrel_ht_stat_csv_fops = {
288 .owner = THIS_MODULE,
289 .open = minstrel_ht_stats_csv_open,
290 .read = minstrel_stats_read,
291 .release = minstrel_stats_release,
296 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
298 struct minstrel_ht_sta_priv *msp = priv_sta;
300 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
301 &minstrel_ht_stat_fops);
302 msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO,
303 dir, msp, &minstrel_ht_stat_csv_fops);
307 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
309 struct minstrel_ht_sta_priv *msp = priv_sta;
311 debugfs_remove(msp->dbg_stats);
312 debugfs_remove(msp->dbg_stats_csv);