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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ec8aa669 FF |
2 | /* |
3 | * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org> | |
ec8aa669 FF |
4 | */ |
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> | |
bc3b2d7f | 10 | #include <linux/export.h> |
ec8aa669 FF |
11 | #include <net/mac80211.h> |
12 | #include "rc80211_minstrel.h" | |
13 | #include "rc80211_minstrel_ht.h" | |
14 | ||
b1c4f683 FF |
15 | static ssize_t |
16 | minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos) | |
17 | { | |
18 | struct minstrel_debugfs_info *ms; | |
19 | ||
20 | ms = file->private_data; | |
21 | return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len); | |
22 | } | |
23 | ||
24 | static int | |
25 | minstrel_stats_release(struct inode *inode, struct file *file) | |
26 | { | |
27 | kfree(file->private_data); | |
28 | return 0; | |
29 | } | |
30 | ||
a0497f9f FF |
31 | static char * |
32 | minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) | |
33 | { | |
a0497f9f | 34 | const struct mcs_group *mg; |
1109dc39 | 35 | unsigned int j, tp_max, tp_avg, eprob, tx_time; |
a0497f9f FF |
36 | char htmode = '2'; |
37 | char gimode = 'L'; | |
8ec7886b | 38 | u32 gflags; |
a0497f9f | 39 | |
41d08583 | 40 | if (!mi->supported[i]) |
a0497f9f FF |
41 | return p; |
42 | ||
43 | mg = &minstrel_mcs_groups[i]; | |
8ec7886b KB |
44 | gflags = mg->flags; |
45 | ||
46 | if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
a0497f9f | 47 | htmode = '4'; |
8ec7886b | 48 | else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) |
9208247d | 49 | htmode = '8'; |
8ec7886b | 50 | if (gflags & IEEE80211_TX_RC_SHORT_GI) |
a0497f9f FF |
51 | gimode = 'S'; |
52 | ||
53 | for (j = 0; j < MCS_GROUP_RATES; j++) { | |
9134073b | 54 | struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j]; |
a0497f9f FF |
55 | static const int bitrates[4] = { 10, 20, 55, 110 }; |
56 | int idx = i * MCS_GROUP_RATES + j; | |
202df504 | 57 | unsigned int duration; |
a0497f9f | 58 | |
41d08583 | 59 | if (!(mi->supported[i] & BIT(j))) |
a0497f9f FF |
60 | continue; |
61 | ||
9c00bb72 TH |
62 | if (gflags & IEEE80211_TX_RC_MCS) { |
63 | p += sprintf(p, "HT%c0 ", htmode); | |
64 | p += sprintf(p, "%cGI ", gimode); | |
65 | p += sprintf(p, "%d ", mg->streams); | |
66 | } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { | |
67 | p += sprintf(p, "VHT%c0 ", htmode); | |
68 | p += sprintf(p, "%cGI ", gimode); | |
69 | p += sprintf(p, "%d ", mg->streams); | |
70 | } else { | |
71 | p += sprintf(p, "CCK "); | |
72 | p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S'); | |
73 | p += sprintf(p, "1 "); | |
74 | } | |
a0497f9f | 75 | |
5935839a TH |
76 | *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' '; |
77 | *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' '; | |
78 | *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' '; | |
79 | *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' '; | |
a0497f9f FF |
80 | *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' '; |
81 | ||
8ec7886b | 82 | if (gflags & IEEE80211_TX_RC_MCS) { |
9c00bb72 | 83 | p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j); |
8ec7886b | 84 | } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { |
9c00bb72 | 85 | p += sprintf(p, " MCS%-1u/%1u", j, mg->streams); |
a0497f9f | 86 | } else { |
8ec7886b KB |
87 | int r = bitrates[j % 4]; |
88 | ||
9c00bb72 | 89 | p += sprintf(p, " %2u.%1uM", r / 10, r % 10); |
a0497f9f FF |
90 | } |
91 | ||
9c00bb72 TH |
92 | p += sprintf(p, " %3u ", idx); |
93 | ||
94 | /* tx_time[rate(i)] in usec */ | |
202df504 FF |
95 | duration = mg->duration[j]; |
96 | duration <<= mg->shift; | |
97 | tx_time = DIV_ROUND_CLOSEST(duration, 1000); | |
50e55a8e | 98 | p += sprintf(p, "%6u ", tx_time); |
9c00bb72 | 99 | |
50e55a8e TH |
100 | tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); |
101 | tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma); | |
9134073b | 102 | eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); |
a0497f9f | 103 | |
506dbf90 | 104 | p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u" |
1109dc39 | 105 | " %3u %3u %-3u " |
5f919abc | 106 | "%9llu %-9llu\n", |
50e55a8e | 107 | tp_max / 10, tp_max % 10, |
6a27b2c4 | 108 | tp_avg / 10, tp_avg % 10, |
a0497f9f | 109 | eprob / 10, eprob % 10, |
9134073b TH |
110 | mrs->retry_count, |
111 | mrs->last_success, | |
112 | mrs->last_attempts, | |
113 | (unsigned long long)mrs->succ_hist, | |
114 | (unsigned long long)mrs->att_hist); | |
a0497f9f FF |
115 | } |
116 | ||
117 | return p; | |
118 | } | |
119 | ||
ec8aa669 FF |
120 | static int |
121 | minstrel_ht_stats_open(struct inode *inode, struct file *file) | |
122 | { | |
123 | struct minstrel_ht_sta_priv *msp = inode->i_private; | |
124 | struct minstrel_ht_sta *mi = &msp->ht; | |
125 | struct minstrel_debugfs_info *ms; | |
a0497f9f | 126 | unsigned int i; |
ec8aa669 | 127 | int ret; |
2cae0b6a | 128 | char *p; |
ec8aa669 FF |
129 | |
130 | if (!msp->is_ht) { | |
131 | inode->i_private = &msp->legacy; | |
132 | ret = minstrel_stats_open(inode, file); | |
133 | inode->i_private = msp; | |
134 | return ret; | |
135 | } | |
136 | ||
9208247d | 137 | ms = kmalloc(32768, GFP_KERNEL); |
ec8aa669 FF |
138 | if (!ms) |
139 | return -ENOMEM; | |
140 | ||
141 | file->private_data = ms; | |
142 | p = ms->buf; | |
9c00bb72 TH |
143 | |
144 | p += sprintf(p, "\n"); | |
a0c391b1 | 145 | p += sprintf(p, |
506dbf90 | 146 | " best ____________rate__________ ____statistics___ _____last____ ______sum-of________\n"); |
a0c391b1 | 147 | p += sprintf(p, |
506dbf90 | 148 | "mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)] [retry|suc|att] [#success | #attempts]\n"); |
11b2357d | 149 | |
8a0ee4fe KB |
150 | p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p); |
151 | for (i = 0; i < MINSTREL_CCK_GROUP; i++) | |
a0497f9f | 152 | p = minstrel_ht_stats_dump(mi, i, p); |
9208247d KB |
153 | for (i++; i < ARRAY_SIZE(mi->groups); i++) |
154 | p = minstrel_ht_stats_dump(mi, i, p); | |
ec8aa669 | 155 | |
ec8aa669 FF |
156 | p += sprintf(p, "\nTotal packet count:: ideal %d " |
157 | "lookaround %d\n", | |
158 | max(0, (int) mi->total_packets - (int) mi->sample_packets), | |
159 | mi->sample_packets); | |
77f7ffdc FF |
160 | if (mi->avg_ampdu_len) |
161 | p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n", | |
162 | MINSTREL_TRUNC(mi->avg_ampdu_len), | |
163 | MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); | |
ec8aa669 | 164 | ms->len = p - ms->buf; |
9208247d | 165 | WARN_ON(ms->len + sizeof(*ms) > 32768); |
11b2357d | 166 | |
a0572d93 | 167 | return nonseekable_open(inode, file); |
ec8aa669 FF |
168 | } |
169 | ||
170 | static const struct file_operations minstrel_ht_stat_fops = { | |
171 | .owner = THIS_MODULE, | |
172 | .open = minstrel_ht_stats_open, | |
173 | .read = minstrel_stats_read, | |
174 | .release = minstrel_stats_release, | |
a0572d93 | 175 | .llseek = no_llseek, |
ec8aa669 FF |
176 | }; |
177 | ||
2cae0b6a TH |
178 | static char * |
179 | minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p) | |
180 | { | |
181 | const struct mcs_group *mg; | |
1109dc39 | 182 | unsigned int j, tp_max, tp_avg, eprob, tx_time; |
2cae0b6a TH |
183 | char htmode = '2'; |
184 | char gimode = 'L'; | |
185 | u32 gflags; | |
186 | ||
41d08583 | 187 | if (!mi->supported[i]) |
2cae0b6a TH |
188 | return p; |
189 | ||
190 | mg = &minstrel_mcs_groups[i]; | |
191 | gflags = mg->flags; | |
192 | ||
193 | if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
194 | htmode = '4'; | |
195 | else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
196 | htmode = '8'; | |
197 | if (gflags & IEEE80211_TX_RC_SHORT_GI) | |
198 | gimode = 'S'; | |
199 | ||
200 | for (j = 0; j < MCS_GROUP_RATES; j++) { | |
9134073b | 201 | struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j]; |
2cae0b6a TH |
202 | static const int bitrates[4] = { 10, 20, 55, 110 }; |
203 | int idx = i * MCS_GROUP_RATES + j; | |
202df504 | 204 | unsigned int duration; |
2cae0b6a | 205 | |
41d08583 | 206 | if (!(mi->supported[i] & BIT(j))) |
2cae0b6a TH |
207 | continue; |
208 | ||
209 | if (gflags & IEEE80211_TX_RC_MCS) { | |
210 | p += sprintf(p, "HT%c0,", htmode); | |
211 | p += sprintf(p, "%cGI,", gimode); | |
212 | p += sprintf(p, "%d,", mg->streams); | |
213 | } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { | |
214 | p += sprintf(p, "VHT%c0,", htmode); | |
215 | p += sprintf(p, "%cGI,", gimode); | |
216 | p += sprintf(p, "%d,", mg->streams); | |
217 | } else { | |
218 | p += sprintf(p, "CCK,"); | |
219 | p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S'); | |
220 | p += sprintf(p, "1,"); | |
221 | } | |
222 | ||
223 | p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : "")); | |
224 | p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : "")); | |
225 | p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : "")); | |
226 | p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : "")); | |
227 | p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : "")); | |
228 | ||
229 | if (gflags & IEEE80211_TX_RC_MCS) { | |
230 | p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j); | |
231 | } else if (gflags & IEEE80211_TX_RC_VHT_MCS) { | |
232 | p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams); | |
233 | } else { | |
234 | int r = bitrates[j % 4]; | |
235 | p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10); | |
236 | } | |
237 | ||
238 | p += sprintf(p, "%u,", idx); | |
202df504 FF |
239 | |
240 | duration = mg->duration[j]; | |
241 | duration <<= mg->shift; | |
242 | tx_time = DIV_ROUND_CLOSEST(duration, 1000); | |
2cae0b6a TH |
243 | p += sprintf(p, "%u,", tx_time); |
244 | ||
50e55a8e TH |
245 | tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); |
246 | tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma); | |
9134073b | 247 | eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); |
2cae0b6a | 248 | |
506dbf90 | 249 | p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u," |
5f919abc | 250 | "%u,%llu,%llu,", |
50e55a8e | 251 | tp_max / 10, tp_max % 10, |
6a27b2c4 | 252 | tp_avg / 10, tp_avg % 10, |
2cae0b6a | 253 | eprob / 10, eprob % 10, |
9134073b TH |
254 | mrs->retry_count, |
255 | mrs->last_success, | |
256 | mrs->last_attempts, | |
257 | (unsigned long long)mrs->succ_hist, | |
258 | (unsigned long long)mrs->att_hist); | |
2cae0b6a TH |
259 | p += sprintf(p, "%d,%d,%d.%d\n", |
260 | max(0, (int) mi->total_packets - | |
261 | (int) mi->sample_packets), | |
262 | mi->sample_packets, | |
263 | MINSTREL_TRUNC(mi->avg_ampdu_len), | |
264 | MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); | |
265 | } | |
266 | ||
267 | return p; | |
268 | } | |
269 | ||
270 | static int | |
271 | minstrel_ht_stats_csv_open(struct inode *inode, struct file *file) | |
272 | { | |
273 | struct minstrel_ht_sta_priv *msp = inode->i_private; | |
274 | struct minstrel_ht_sta *mi = &msp->ht; | |
275 | struct minstrel_debugfs_info *ms; | |
276 | unsigned int i; | |
277 | int ret; | |
278 | char *p; | |
279 | ||
280 | if (!msp->is_ht) { | |
281 | inode->i_private = &msp->legacy; | |
282 | ret = minstrel_stats_csv_open(inode, file); | |
283 | inode->i_private = msp; | |
284 | return ret; | |
285 | } | |
286 | ||
287 | ms = kmalloc(32768, GFP_KERNEL); | |
288 | ||
289 | if (!ms) | |
290 | return -ENOMEM; | |
291 | ||
292 | file->private_data = ms; | |
293 | ||
294 | p = ms->buf; | |
295 | ||
296 | p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p); | |
297 | for (i = 0; i < MINSTREL_CCK_GROUP; i++) | |
298 | p = minstrel_ht_stats_csv_dump(mi, i, p); | |
299 | for (i++; i < ARRAY_SIZE(mi->groups); i++) | |
300 | p = minstrel_ht_stats_csv_dump(mi, i, p); | |
301 | ||
302 | ms->len = p - ms->buf; | |
303 | WARN_ON(ms->len + sizeof(*ms) > 32768); | |
304 | ||
305 | return nonseekable_open(inode, file); | |
306 | } | |
307 | ||
308 | static const struct file_operations minstrel_ht_stat_csv_fops = { | |
309 | .owner = THIS_MODULE, | |
310 | .open = minstrel_ht_stats_csv_open, | |
311 | .read = minstrel_stats_read, | |
312 | .release = minstrel_stats_release, | |
313 | .llseek = no_llseek, | |
314 | }; | |
315 | ||
ec8aa669 FF |
316 | void |
317 | minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) | |
318 | { | |
319 | struct minstrel_ht_sta_priv *msp = priv_sta; | |
320 | ||
5b5e8731 FF |
321 | debugfs_create_file("rc_stats", 0444, dir, msp, |
322 | &minstrel_ht_stat_fops); | |
323 | debugfs_create_file("rc_stats_csv", 0444, dir, msp, | |
324 | &minstrel_ht_stat_csv_fops); | |
ec8aa669 | 325 | } |