1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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_ht.h"
14 struct minstrel_debugfs_info {
20 minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
22 struct minstrel_debugfs_info *ms;
24 ms = file->private_data;
25 return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
29 minstrel_stats_release(struct inode *inode, struct file *file)
31 kfree(file->private_data);
36 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
38 const struct mcs_group *mg;
39 unsigned int j, tp_max, tp_avg, eprob, tx_time;
44 if (!mi->supported[i])
47 mg = &minstrel_mcs_groups[i];
50 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
52 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
54 if (gflags & IEEE80211_TX_RC_SHORT_GI)
57 for (j = 0; j < MCS_GROUP_RATES; j++) {
58 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
59 int idx = i * MCS_GROUP_RATES + j;
60 unsigned int duration;
62 if (!(mi->supported[i] & BIT(j)))
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 if (i == MINSTREL_OFDM_GROUP) {
74 p += sprintf(p, "OFDM ");
75 p += sprintf(p, "1 ");
77 p += sprintf(p, "CCK ");
78 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
79 p += sprintf(p, "1 ");
82 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
83 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
84 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
85 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
86 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
88 if (gflags & IEEE80211_TX_RC_MCS) {
89 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
90 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
91 p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
95 if (i == MINSTREL_OFDM_GROUP)
96 r = minstrel_ofdm_bitrates[j % 8];
98 r = minstrel_cck_bitrates[j % 4];
100 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
103 p += sprintf(p, " %3u ", idx);
105 /* tx_time[rate(i)] in usec */
106 duration = mg->duration[j];
107 duration <<= mg->shift;
108 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
109 p += sprintf(p, "%6u ", tx_time);
111 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
112 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
113 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
115 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u"
118 tp_max / 10, tp_max % 10,
119 tp_avg / 10, tp_avg % 10,
120 eprob / 10, eprob % 10,
124 (unsigned long long)mrs->succ_hist,
125 (unsigned long long)mrs->att_hist);
132 minstrel_ht_stats_open(struct inode *inode, struct file *file)
134 struct minstrel_ht_sta *mi = inode->i_private;
135 struct minstrel_debugfs_info *ms;
139 ms = kmalloc(32768, GFP_KERNEL);
143 file->private_data = ms;
146 p += sprintf(p, "\n");
148 " best ____________rate__________ ____statistics___ _____last____ ______sum-of________\n");
150 "mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)] [retry|suc|att] [#success | #attempts]\n");
152 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
153 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
154 p = minstrel_ht_stats_dump(mi, i, p);
155 for (i++; i < ARRAY_SIZE(mi->groups); i++)
156 p = minstrel_ht_stats_dump(mi, i, p);
158 p += sprintf(p, "\nTotal packet count:: ideal %d "
160 max(0, (int) mi->total_packets - (int) mi->sample_packets),
162 if (mi->avg_ampdu_len)
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);
169 return nonseekable_open(inode, file);
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,
181 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
183 const struct mcs_group *mg;
184 unsigned int j, tp_max, tp_avg, eprob, tx_time;
189 if (!mi->supported[i])
192 mg = &minstrel_mcs_groups[i];
195 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
197 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
199 if (gflags & IEEE80211_TX_RC_SHORT_GI)
202 for (j = 0; j < MCS_GROUP_RATES; j++) {
203 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
204 int idx = i * MCS_GROUP_RATES + j;
205 unsigned int duration;
207 if (!(mi->supported[i] & BIT(j)))
210 if (gflags & IEEE80211_TX_RC_MCS) {
211 p += sprintf(p, "HT%c0,", htmode);
212 p += sprintf(p, "%cGI,", gimode);
213 p += sprintf(p, "%d,", mg->streams);
214 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
215 p += sprintf(p, "VHT%c0,", htmode);
216 p += sprintf(p, "%cGI,", gimode);
217 p += sprintf(p, "%d,", mg->streams);
218 } else if (i == MINSTREL_OFDM_GROUP) {
219 p += sprintf(p, "OFDM,,1,");
221 p += sprintf(p, "CCK,");
222 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
223 p += sprintf(p, "1,");
226 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
227 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
228 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
229 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
230 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
232 if (gflags & IEEE80211_TX_RC_MCS) {
233 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
234 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
235 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
239 if (i == MINSTREL_OFDM_GROUP)
240 r = minstrel_ofdm_bitrates[j % 8];
242 r = minstrel_cck_bitrates[j % 4];
244 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
247 p += sprintf(p, "%u,", idx);
249 duration = mg->duration[j];
250 duration <<= mg->shift;
251 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
252 p += sprintf(p, "%u,", tx_time);
254 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
255 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
256 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
258 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
260 tp_max / 10, tp_max % 10,
261 tp_avg / 10, tp_avg % 10,
262 eprob / 10, eprob % 10,
266 (unsigned long long)mrs->succ_hist,
267 (unsigned long long)mrs->att_hist);
268 p += sprintf(p, "%d,%d,%d.%d\n",
269 max(0, (int) mi->total_packets -
270 (int) mi->sample_packets),
272 MINSTREL_TRUNC(mi->avg_ampdu_len),
273 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
280 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
282 struct minstrel_ht_sta *mi = inode->i_private;
283 struct minstrel_debugfs_info *ms;
287 ms = kmalloc(32768, GFP_KERNEL);
291 file->private_data = ms;
295 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
296 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
297 p = minstrel_ht_stats_csv_dump(mi, i, p);
298 for (i++; i < ARRAY_SIZE(mi->groups); i++)
299 p = minstrel_ht_stats_csv_dump(mi, i, p);
301 ms->len = p - ms->buf;
302 WARN_ON(ms->len + sizeof(*ms) > 32768);
304 return nonseekable_open(inode, file);
307 static const struct file_operations minstrel_ht_stat_csv_fops = {
308 .owner = THIS_MODULE,
309 .open = minstrel_ht_stats_csv_open,
310 .read = minstrel_stats_read,
311 .release = minstrel_stats_release,
316 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
318 debugfs_create_file("rc_stats", 0444, dir, priv_sta,
319 &minstrel_ht_stat_fops);
320 debugfs_create_file("rc_stats_csv", 0444, dir, priv_sta,
321 &minstrel_ht_stat_csv_fops);