2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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.
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"
19 minstrel_ht_stats_dump(struct minstrel_ht_sta
*mi
, int i
, char *p
)
21 const struct mcs_group
*mg
;
22 unsigned int j
, tp
, prob
, eprob
;
27 if (!mi
->groups
[i
].supported
)
30 mg
= &minstrel_mcs_groups
[i
];
33 if (gflags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
35 else if (gflags
& IEEE80211_TX_RC_80_MHZ_WIDTH
)
37 if (gflags
& IEEE80211_TX_RC_SHORT_GI
)
40 for (j
= 0; j
< MCS_GROUP_RATES
; j
++) {
41 struct minstrel_rate_stats
*mr
= &mi
->groups
[i
].rates
[j
];
42 static const int bitrates
[4] = { 10, 20, 55, 110 };
43 int idx
= i
* MCS_GROUP_RATES
+ j
;
45 if (!(mi
->groups
[i
].supported
& BIT(j
)))
48 if (gflags
& IEEE80211_TX_RC_MCS
)
49 p
+= sprintf(p
, " HT%c0/%cGI ", htmode
, gimode
);
50 else if (gflags
& IEEE80211_TX_RC_VHT_MCS
)
51 p
+= sprintf(p
, "VHT%c0/%cGI ", htmode
, gimode
);
53 p
+= sprintf(p
, " CCK/%cP ", j
< 4 ? 'L' : 'S');
55 *(p
++) = (idx
== mi
->max_tp_rate
[0]) ? 'A' : ' ';
56 *(p
++) = (idx
== mi
->max_tp_rate
[1]) ? 'B' : ' ';
57 *(p
++) = (idx
== mi
->max_tp_rate
[2]) ? 'C' : ' ';
58 *(p
++) = (idx
== mi
->max_tp_rate
[3]) ? 'D' : ' ';
59 *(p
++) = (idx
== mi
->max_prob_rate
) ? 'P' : ' ';
61 if (gflags
& IEEE80211_TX_RC_MCS
) {
62 p
+= sprintf(p
, " MCS%-2u ", (mg
->streams
- 1) * 8 + j
);
63 } else if (gflags
& IEEE80211_TX_RC_VHT_MCS
) {
64 p
+= sprintf(p
, " MCS%-1u/%1u", j
, mg
->streams
);
66 int r
= bitrates
[j
% 4];
68 p
+= sprintf(p
, " %2u.%1uM ", r
/ 10, r
% 10);
72 prob
= MINSTREL_TRUNC(mr
->cur_prob
* 1000);
73 eprob
= MINSTREL_TRUNC(mr
->probability
* 1000);
75 p
+= sprintf(p
, " %4u.%1u %3u.%1u %3u.%1u "
76 "%3u %4u(%4u) %9llu(%9llu)\n",
78 eprob
/ 10, eprob
% 10,
83 (unsigned long long)mr
->succ_hist
,
84 (unsigned long long)mr
->att_hist
);
91 minstrel_ht_stats_open(struct inode
*inode
, struct file
*file
)
93 struct minstrel_ht_sta_priv
*msp
= inode
->i_private
;
94 struct minstrel_ht_sta
*mi
= &msp
->ht
;
95 struct minstrel_debugfs_info
*ms
;
101 inode
->i_private
= &msp
->legacy
;
102 ret
= minstrel_stats_open(inode
, file
);
103 inode
->i_private
= msp
;
107 ms
= kmalloc(32768, GFP_KERNEL
);
111 file
->private_data
= ms
;
113 p
+= sprintf(p
, " type rate tpt eprob *prob "
114 "ret *ok(*cum) ok( cum)\n");
116 p
= minstrel_ht_stats_dump(mi
, MINSTREL_CCK_GROUP
, p
);
117 for (i
= 0; i
< MINSTREL_CCK_GROUP
; i
++)
118 p
= minstrel_ht_stats_dump(mi
, i
, p
);
119 for (i
++; i
< ARRAY_SIZE(mi
->groups
); i
++)
120 p
= minstrel_ht_stats_dump(mi
, i
, p
);
122 p
+= sprintf(p
, "\nTotal packet count:: ideal %d "
124 max(0, (int) mi
->total_packets
- (int) mi
->sample_packets
),
126 p
+= sprintf(p
, "Average A-MPDU length: %d.%d\n",
127 MINSTREL_TRUNC(mi
->avg_ampdu_len
),
128 MINSTREL_TRUNC(mi
->avg_ampdu_len
* 10) % 10);
129 ms
->len
= p
- ms
->buf
;
131 WARN_ON(ms
->len
+ sizeof(*ms
) > 32768);
133 return nonseekable_open(inode
, file
);
136 static const struct file_operations minstrel_ht_stat_fops
= {
137 .owner
= THIS_MODULE
,
138 .open
= minstrel_ht_stats_open
,
139 .read
= minstrel_stats_read
,
140 .release
= minstrel_stats_release
,
145 minstrel_ht_add_sta_debugfs(void *priv
, void *priv_sta
, struct dentry
*dir
)
147 struct minstrel_ht_sta_priv
*msp
= priv_sta
;
149 msp
->dbg_stats
= debugfs_create_file("rc_stats", S_IRUGO
, dir
, msp
,
150 &minstrel_ht_stat_fops
);
154 minstrel_ht_remove_sta_debugfs(void *priv
, void *priv_sta
)
156 struct minstrel_ht_sta_priv
*msp
= priv_sta
;
158 debugfs_remove(msp
->dbg_stats
);