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Linux 5.1.15
[linux/fpc-iii.git] / net / mac80211 / rc80211_minstrel_ht_debugfs.c
blob31641d0b0f5cd25fff4eb7672a00fd37f285daeb
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 if (mi->avg_ampdu_len)
164 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
165 MINSTREL_TRUNC(mi->avg_ampdu_len),
166 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
167 ms->len = p - ms->buf;
168 WARN_ON(ms->len + sizeof(*ms) > 32768);
169
170 return nonseekable_open(inode, file);
171 }
172
173 static const struct file_operations minstrel_ht_stat_fops = {
174 .owner = THIS_MODULE,
175 .open = minstrel_ht_stats_open,
176 .read = minstrel_stats_read,
177 .release = minstrel_stats_release,
178 .llseek = no_llseek,
179 };
180
181 static char *
182 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
183 {
184 const struct mcs_group *mg;
185 unsigned int j, tp_max, tp_avg, eprob, tx_time;
186 char htmode = '2';
187 char gimode = 'L';
188 u32 gflags;
189
190 if (!mi->supported[i])
191 return p;
192
193 mg = &minstrel_mcs_groups[i];
194 gflags = mg->flags;
195
196 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
197 htmode = '4';
198 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
199 htmode = '8';
200 if (gflags & IEEE80211_TX_RC_SHORT_GI)
201 gimode = 'S';
202
203 for (j = 0; j < MCS_GROUP_RATES; j++) {
204 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
205 static const int bitrates[4] = { 10, 20, 55, 110 };
206 int idx = i * MCS_GROUP_RATES + j;
207 unsigned int duration;
208
209 if (!(mi->supported[i] & BIT(j)))
210 continue;
211
212 if (gflags & IEEE80211_TX_RC_MCS) {
213 p += sprintf(p, "HT%c0,", htmode);
214 p += sprintf(p, "%cGI,", gimode);
215 p += sprintf(p, "%d,", mg->streams);
216 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
217 p += sprintf(p, "VHT%c0,", htmode);
218 p += sprintf(p, "%cGI,", gimode);
219 p += sprintf(p, "%d,", mg->streams);
220 } else {
221 p += sprintf(p, "CCK,");
222 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
223 p += sprintf(p, "1,");
224 }
225
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" : ""));
231
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);
236 } else {
237 int r = bitrates[j % 4];
238 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
239 }
240
241 p += sprintf(p, "%u,", idx);
242
243 duration = mg->duration[j];
244 duration <<= mg->shift;
245 tx_time = DIV_ROUND_CLOSEST(duration, 1000);
246 p += sprintf(p, "%u,", tx_time);
247
248 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
249 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
250 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
251
252 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
253 "%u,%llu,%llu,",
254 tp_max / 10, tp_max % 10,
255 tp_avg / 10, tp_avg % 10,
256 eprob / 10, eprob % 10,
257 mrs->retry_count,
258 mrs->last_success,
259 mrs->last_attempts,
260 (unsigned long long)mrs->succ_hist,
261 (unsigned long long)mrs->att_hist);
262 p += sprintf(p, "%d,%d,%d.%d\n",
263 max(0, (int) mi->total_packets -
264 (int) mi->sample_packets),
265 mi->sample_packets,
266 MINSTREL_TRUNC(mi->avg_ampdu_len),
267 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
268 }
269
270 return p;
271 }
272
273 static int
274 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
275 {
276 struct minstrel_ht_sta_priv *msp = inode->i_private;
277 struct minstrel_ht_sta *mi = &msp->ht;
278 struct minstrel_debugfs_info *ms;
279 unsigned int i;
280 int ret;
281 char *p;
282
283 if (!msp->is_ht) {
284 inode->i_private = &msp->legacy;
285 ret = minstrel_stats_csv_open(inode, file);
286 inode->i_private = msp;
287 return ret;
288 }
289
290 ms = kmalloc(32768, GFP_KERNEL);
291
292 if (!ms)
293 return -ENOMEM;
294
295 file->private_data = ms;
296
297 p = ms->buf;
298
299 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
300 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
301 p = minstrel_ht_stats_csv_dump(mi, i, p);
302 for (i++; i < ARRAY_SIZE(mi->groups); i++)
303 p = minstrel_ht_stats_csv_dump(mi, i, p);
304
305 ms->len = p - ms->buf;
306 WARN_ON(ms->len + sizeof(*ms) > 32768);
307
308 return nonseekable_open(inode, file);
309 }
310
311 static const struct file_operations minstrel_ht_stat_csv_fops = {
312 .owner = THIS_MODULE,
313 .open = minstrel_ht_stats_csv_open,
314 .read = minstrel_stats_read,
315 .release = minstrel_stats_release,
316 .llseek = no_llseek,
317 };
318
319 void
320 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
321 {
322 struct minstrel_ht_sta_priv *msp = priv_sta;
323
324 debugfs_create_file("rc_stats", 0444, dir, msp,
325 &minstrel_ht_stat_fops);
326 debugfs_create_file("rc_stats_csv", 0444, dir, msp,
327 &minstrel_ht_stat_csv_fops);
328 }
Linux with added FPC-III support