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Linux 4.1.16
[linux/fpc-iii.git] / net / mac80211 / rc80211_minstrel_ht_debugfs.c
blob6822ce0f95e580641f782fb2f59dcf9f09e5e639
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, prob, eprob, tx_time;
23 char htmode = '2';
24 char gimode = 'L';
25 u32 gflags;
26
27 if (!mi->groups[i].supported)
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
45 if (!(mi->groups[i].supported & BIT(j)))
46 continue;
47
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);
56 } else {
57 p += sprintf(p, "CCK ");
58 p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
59 p += sprintf(p, "1 ");
60 }
61
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' : ' ';
67
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);
72 } else {
73 int r = bitrates[j % 4];
74
75 p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
76 }
77
78 p += sprintf(p, " %3u ", idx);
79
80 /* tx_time[rate(i)] in usec */
81 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
82 p += sprintf(p, "%6u ", tx_time);
83
84 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
85 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
86 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
87 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
88
89 p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u"
90 " %3u.%1u %3u %3u %-3u "
91 "%9llu %-9llu\n",
92 tp_max / 10, tp_max % 10,
93 tp_avg / 10, tp_avg % 10,
94 eprob / 10, eprob % 10,
95 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
96 prob / 10, prob % 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, " best ____________rate__________ "
133 "______statistics______ ________last_______ "
134 "______sum-of________\n");
135 p += sprintf(p, "mode guard # rate [name idx airtime max_tp] "
136 "[ ø(tp) ø(prob) sd(prob)] [prob.|retry|suc|att] [#success | "
137 "#attempts]\n");
138
139 p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
140 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
141 p = minstrel_ht_stats_dump(mi, i, p);
142 for (i++; i < ARRAY_SIZE(mi->groups); i++)
143 p = minstrel_ht_stats_dump(mi, i, p);
144
145 p += sprintf(p, "\nTotal packet count:: ideal %d "
146 "lookaround %d\n",
147 max(0, (int) mi->total_packets - (int) mi->sample_packets),
148 mi->sample_packets);
149 p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
150 MINSTREL_TRUNC(mi->avg_ampdu_len),
151 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
152 ms->len = p - ms->buf;
153 WARN_ON(ms->len + sizeof(*ms) > 32768);
154
155 return nonseekable_open(inode, file);
156 }
157
158 static const struct file_operations minstrel_ht_stat_fops = {
159 .owner = THIS_MODULE,
160 .open = minstrel_ht_stats_open,
161 .read = minstrel_stats_read,
162 .release = minstrel_stats_release,
163 .llseek = no_llseek,
164 };
165
166 static char *
167 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
168 {
169 const struct mcs_group *mg;
170 unsigned int j, tp_max, tp_avg, prob, eprob, tx_time;
171 char htmode = '2';
172 char gimode = 'L';
173 u32 gflags;
174
175 if (!mi->groups[i].supported)
176 return p;
177
178 mg = &minstrel_mcs_groups[i];
179 gflags = mg->flags;
180
181 if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
182 htmode = '4';
183 else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
184 htmode = '8';
185 if (gflags & IEEE80211_TX_RC_SHORT_GI)
186 gimode = 'S';
187
188 for (j = 0; j < MCS_GROUP_RATES; j++) {
189 struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
190 static const int bitrates[4] = { 10, 20, 55, 110 };
191 int idx = i * MCS_GROUP_RATES + j;
192
193 if (!(mi->groups[i].supported & BIT(j)))
194 continue;
195
196 if (gflags & IEEE80211_TX_RC_MCS) {
197 p += sprintf(p, "HT%c0,", htmode);
198 p += sprintf(p, "%cGI,", gimode);
199 p += sprintf(p, "%d,", mg->streams);
200 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
201 p += sprintf(p, "VHT%c0,", htmode);
202 p += sprintf(p, "%cGI,", gimode);
203 p += sprintf(p, "%d,", mg->streams);
204 } else {
205 p += sprintf(p, "CCK,");
206 p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
207 p += sprintf(p, "1,");
208 }
209
210 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
211 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
212 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
213 p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
214 p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
215
216 if (gflags & IEEE80211_TX_RC_MCS) {
217 p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
218 } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
219 p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
220 } else {
221 int r = bitrates[j % 4];
222 p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
223 }
224
225 p += sprintf(p, "%u,", idx);
226 tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
227 p += sprintf(p, "%u,", tx_time);
228
229 tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
230 tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
231 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
232 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
233
234 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,"
235 "%u,%llu,%llu,",
236 tp_max / 10, tp_max % 10,
237 tp_avg / 10, tp_avg % 10,
238 eprob / 10, eprob % 10,
239 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
240 prob / 10, prob % 10,
241 mrs->retry_count,
242 mrs->last_success,
243 mrs->last_attempts,
244 (unsigned long long)mrs->succ_hist,
245 (unsigned long long)mrs->att_hist);
246 p += sprintf(p, "%d,%d,%d.%d\n",
247 max(0, (int) mi->total_packets -
248 (int) mi->sample_packets),
249 mi->sample_packets,
250 MINSTREL_TRUNC(mi->avg_ampdu_len),
251 MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
252 }
253
254 return p;
255 }
256
257 static int
258 minstrel_ht_stats_csv_open(struct inode *inode, struct file *file)
259 {
260 struct minstrel_ht_sta_priv *msp = inode->i_private;
261 struct minstrel_ht_sta *mi = &msp->ht;
262 struct minstrel_debugfs_info *ms;
263 unsigned int i;
264 int ret;
265 char *p;
266
267 if (!msp->is_ht) {
268 inode->i_private = &msp->legacy;
269 ret = minstrel_stats_csv_open(inode, file);
270 inode->i_private = msp;
271 return ret;
272 }
273
274 ms = kmalloc(32768, GFP_KERNEL);
275
276 if (!ms)
277 return -ENOMEM;
278
279 file->private_data = ms;
280
281 p = ms->buf;
282
283 p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
284 for (i = 0; i < MINSTREL_CCK_GROUP; i++)
285 p = minstrel_ht_stats_csv_dump(mi, i, p);
286 for (i++; i < ARRAY_SIZE(mi->groups); i++)
287 p = minstrel_ht_stats_csv_dump(mi, i, p);
288
289 ms->len = p - ms->buf;
290 WARN_ON(ms->len + sizeof(*ms) > 32768);
291
292 return nonseekable_open(inode, file);
293 }
294
295 static const struct file_operations minstrel_ht_stat_csv_fops = {
296 .owner = THIS_MODULE,
297 .open = minstrel_ht_stats_csv_open,
298 .read = minstrel_stats_read,
299 .release = minstrel_stats_release,
300 .llseek = no_llseek,
301 };
302
303 void
304 minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
305 {
306 struct minstrel_ht_sta_priv *msp = priv_sta;
307
308 msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
309 &minstrel_ht_stat_fops);
310 msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO,
311 dir, msp, &minstrel_ht_stat_csv_fops);
312 }
313
314 void
315 minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
316 {
317 struct minstrel_ht_sta_priv *msp = priv_sta;
318
319 debugfs_remove(msp->dbg_stats);
320 debugfs_remove(msp->dbg_stats_csv);
321 }
Linux with added FPC-III support