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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / mac80211 / rc80211_minstrel_ht_debugfs.c
blob7d969e300fb3a48742e841eb0140aba03b5de071
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, eprob, tx_time;
23 char htmode = '2';
24 char gimode = 'L';
25 u32 gflags;
26
27 if (!mi->supported[i])
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 unsigned int prob_ewmsd;
45
46 if (!(mi->supported[i] & BIT(j)))
47 continue;
48
49 if (gflags & IEEE80211_TX_RC_MCS) {
50 p += sprintf(p, "HT%c0 ", htmode);
51 p += sprintf(p, "%cGI ", gimode);
52 p += sprintf(p, "%d ", mg->streams);
53 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
54 p += sprintf(p, "VHT%c0 ", htmode);
55 p += sprintf(p, "%cGI ", gimode);
56 p += sprintf(p, "%d ", mg->streams);
57 } else {
58 p += sprintf(p, "CCK ");
59 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
60 p += sprintf(p, "1 ");
61 }
62
63 *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
64 *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
65 *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
66 *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
67 *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
68
69 if (gflags & IEEE80211_TX_RC_MCS) {
70 p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
71 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
72 p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
73 } else {
74 int r = bitrates[j % 4];
75
76 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
77 }
78
79 p += sprintf(p, " %3u ", idx);
80
81 /* tx_time[rate(i)] in usec */
82 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
83 p += sprintf(p, "%6u ", tx_time);
84
85 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
86 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
87 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
88 prob_ewmsd = minstrel_get_ewmsd10(mrs);
89
90 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u"
91 " %3u %3u %-3u "
92 "%9llu %-9llu\n",
93 tp_max / 10, tp_max % 10,
94 tp_avg / 10, tp_avg % 10,
95 eprob / 10, eprob % 10,
96 prob_ewmsd / 10, prob_ewmsd % 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)] [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, eprob, tx_time;
169 char htmode = '2';
170 char gimode = 'L';
171 u32 gflags;
172
173 if (!mi->supported[i])
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 unsigned int prob_ewmsd;
191
192 if (!(mi->supported[i] & BIT(j)))
193 continue;
194
195 if (gflags & IEEE80211_TX_RC_MCS) {
196 p += sprintf(p, "HT%c0,", htmode);
197 p += sprintf(p, "%cGI,", gimode);
198 p += sprintf(p, "%d,", mg->streams);
199 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
200 p += sprintf(p, "VHT%c0,", htmode);
201 p += sprintf(p, "%cGI,", gimode);
202 p += sprintf(p, "%d,", mg->streams);
203 } else {
204 p += sprintf(p, "CCK,");
205 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
206 p += sprintf(p, "1,");
207 }
208
209 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
210 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
211 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
212 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
213 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
214
215 if (gflags & IEEE80211_TX_RC_MCS) {
216 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
217 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
218 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
219 } else {
220 int r = bitrates[j % 4];
221 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
222 }
223
224 p += sprintf(p, "%u,", idx);
225 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
226 p += sprintf(p, "%u,", tx_time);
227
228 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
229 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
230 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
231 prob_ewmsd = minstrel_get_ewmsd10(mrs);
232
233 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,"
234 "%u,%llu,%llu,",
235 tp_max / 10, tp_max % 10,
236 tp_avg / 10, tp_avg % 10,
237 eprob / 10, eprob % 10,
238 prob_ewmsd / 10, prob_ewmsd % 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 }
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