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_is_sample_rate(struct minstrel_ht_sta *mi, int idx)
40 for (type = 0; type < ARRAY_SIZE(mi->sample); type++)
41 for (i = 0; i < MINSTREL_SAMPLE_RATES; i++)
42 if (mi->sample[type].cur_sample_rates[i] == idx)
48 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
50 const struct mcs_group *mg;
51 unsigned int j, tp_max, tp_avg, eprob, tx_time;
56 if (!mi->supported[i])
59 mg = &minstrel_mcs_groups[i];
62 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
64 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
66 if (gflags & IEEE80211_TX_RC_SHORT_GI)
69 for (j = 0; j < MCS_GROUP_RATES; j++) {
70 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
71 int idx = MI_RATE(i, j);
72 unsigned int duration;
74 if (!(mi->supported[i] & BIT(j)))
77 if (gflags & IEEE80211_TX_RC_MCS) {
78 p += sprintf(p, "HT%c0 ", htmode);
79 p += sprintf(p, "%cGI ", gimode);
80 p += sprintf(p, "%d ", mg->streams);
81 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
82 p += sprintf(p, "VHT%c0 ", htmode);
83 p += sprintf(p, "%cGI ", gimode);
84 p += sprintf(p, "%d ", mg->streams);
85 } else if (i == MINSTREL_OFDM_GROUP) {
86 p += sprintf(p, "OFDM ");
87 p += sprintf(p, "1 ");
89 p += sprintf(p, "CCK ");
90 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
91 p += sprintf(p, "1 ");
94 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
95 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
96 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
97 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
98 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
99 *(p++) = minstrel_ht_is_sample_rate(mi, idx) ? 'S' : ' ';
101 if (gflags & IEEE80211_TX_RC_MCS) {
102 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
103 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
104 p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
108 if (i == MINSTREL_OFDM_GROUP)
109 r = minstrel_ofdm_bitrates[j % 8];
111 r = minstrel_cck_bitrates[j % 4];
113 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
116 p += sprintf(p, " %3u ", idx);
118 /* tx_time[rate(i)] in usec */
119 duration = mg->duration[j];
120 duration <<= mg->shift;
121 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
122 p += sprintf(p, "%6u ", tx_time);
124 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
125 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
126 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
128 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u"
131 tp_max / 10, tp_max % 10,
132 tp_avg / 10, tp_avg % 10,
133 eprob / 10, eprob % 10,
137 (unsigned long long)mrs->succ_hist,
138 (unsigned long long)mrs->att_hist);
145 minstrel_ht_stats_open(struct inode *inode, struct file *file)
147 struct minstrel_ht_sta *mi = inode->i_private;
148 struct minstrel_debugfs_info *ms;
152 ms = kmalloc(32768, GFP_KERNEL);
156 file->private_data = ms;
159 p += sprintf(p, "\n");
161 " best ____________rate__________ ____statistics___ _____last____ ______sum-of________\n");
163 "mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)] [retry|suc|att] [#success | #attempts]\n");
165 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
166 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
167 p = minstrel_ht_stats_dump(mi, i, p);
168 for (i++; i < ARRAY_SIZE(mi->groups); i++)
169 p = minstrel_ht_stats_dump(mi, i, p);
171 p += sprintf(p, "\nTotal packet count:: ideal %d "
173 max(0, (int) mi->total_packets - (int) mi->sample_packets),
175 if (mi->avg_ampdu_len)
176 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
177 MINSTREL_TRUNC(mi->avg_ampdu_len),
178 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
179 ms->len = p - ms->buf;
180 WARN_ON(ms->len + sizeof(*ms) > 32768);
182 return nonseekable_open(inode, file);
185 static const struct file_operations minstrel_ht_stat_fops = {
186 .owner = THIS_MODULE,
187 .open = minstrel_ht_stats_open,
188 .read = minstrel_stats_read,
189 .release = minstrel_stats_release,
194 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
196 const struct mcs_group *mg;
197 unsigned int j, tp_max, tp_avg, eprob, tx_time;
202 if (!mi->supported[i])
205 mg = &minstrel_mcs_groups[i];
208 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
210 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
212 if (gflags & IEEE80211_TX_RC_SHORT_GI)
215 for (j = 0; j < MCS_GROUP_RATES; j++) {
216 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
217 int idx = MI_RATE(i, j);
218 unsigned int duration;
220 if (!(mi->supported[i] & BIT(j)))
223 if (gflags & IEEE80211_TX_RC_MCS) {
224 p += sprintf(p, "HT%c0,", htmode);
225 p += sprintf(p, "%cGI,", gimode);
226 p += sprintf(p, "%d,", mg->streams);
227 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
228 p += sprintf(p, "VHT%c0,", htmode);
229 p += sprintf(p, "%cGI,", gimode);
230 p += sprintf(p, "%d,", mg->streams);
231 } else if (i == MINSTREL_OFDM_GROUP) {
232 p += sprintf(p, "OFDM,,1,");
234 p += sprintf(p, "CCK,");
235 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
236 p += sprintf(p, "1,");
239 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
240 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
241 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
242 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
243 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
244 p += sprintf(p, "%s", (minstrel_ht_is_sample_rate(mi, idx) ? "S" : ""));
246 if (gflags & IEEE80211_TX_RC_MCS) {
247 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
248 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
249 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
253 if (i == MINSTREL_OFDM_GROUP)
254 r = minstrel_ofdm_bitrates[j % 8];
256 r = minstrel_cck_bitrates[j % 4];
258 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
261 p += sprintf(p, "%u,", idx);
263 duration = mg->duration[j];
264 duration <<= mg->shift;
265 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
266 p += sprintf(p, "%u,", tx_time);
268 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
269 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
270 eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
272 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
274 tp_max / 10, tp_max % 10,
275 tp_avg / 10, tp_avg % 10,
276 eprob / 10, eprob % 10,
280 (unsigned long long)mrs->succ_hist,
281 (unsigned long long)mrs->att_hist);
282 p += sprintf(p, "%d,%d,%d.%d\n",
283 max(0, (int) mi->total_packets -
284 (int) mi->sample_packets),
286 MINSTREL_TRUNC(mi->avg_ampdu_len),
287 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
294 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
296 struct minstrel_ht_sta *mi = inode->i_private;
297 struct minstrel_debugfs_info *ms;
301 ms = kmalloc(32768, GFP_KERNEL);
305 file->private_data = ms;
309 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
310 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
311 p = minstrel_ht_stats_csv_dump(mi, i, p);
312 for (i++; i < ARRAY_SIZE(mi->groups); i++)
313 p = minstrel_ht_stats_csv_dump(mi, i, p);
315 ms->len = p - ms->buf;
316 WARN_ON(ms->len + sizeof(*ms) > 32768);
318 return nonseekable_open(inode, file);
321 static const struct file_operations minstrel_ht_stat_csv_fops = {
322 .owner = THIS_MODULE,
323 .open = minstrel_ht_stats_csv_open,
324 .read = minstrel_stats_read,
325 .release = minstrel_stats_release,
330 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
332 debugfs_create_file("rc_stats", 0444, dir, priv_sta,
333 &minstrel_ht_stat_fops);
334 debugfs_create_file("rc_stats_csv", 0444, dir, priv_sta,
335 &minstrel_ht_stat_csv_fops);