1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2021 Intel Corporation. All rights rsvd. */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/debugfs.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <uapi/linux/idxd.h>
#include "idxd.h"
#include "registers.h"
static struct dentry *idxd_debugfs_dir;
static void dump_event_entry(struct idxd_device *idxd, struct seq_file *s,
u16 index, int *count, bool processed)
{
struct idxd_evl *evl = idxd->evl;
struct dsa_evl_entry *entry;
struct dsa_completion_record *cr;
u64 *raw;
int i;
int evl_strides = evl_ent_size(idxd) / sizeof(u64);
entry = (struct dsa_evl_entry *)evl->log + index;
if (!entry->e.desc_valid)
return;
seq_printf(s, "Event Log entry %d (real index %u) processed: %u\n",
*count, index, processed);
seq_printf(s, "desc valid %u wq idx valid %u\n"
"batch %u fault rw %u priv %u error 0x%x\n"
"wq idx %u op %#x pasid %u batch idx %u\n"
"fault addr %#llx\n",
entry->e.desc_valid, entry->e.wq_idx_valid,
entry->e.batch, entry->e.fault_rw, entry->e.priv,
entry->e.error, entry->e.wq_idx, entry->e.operation,
entry->e.pasid, entry->e.batch_idx, entry->e.fault_addr);
cr = &entry->cr;
seq_printf(s, "status %#x result %#x fault_info %#x bytes_completed %u\n"
"fault addr %#llx inv flags %#x\n\n",
cr->status, cr->result, cr->fault_info, cr->bytes_completed,
cr->fault_addr, cr->invalid_flags);
raw = (u64 *)entry;
for (i = 0; i < evl_strides; i++)
seq_printf(s, "entry[%d] = %#llx\n", i, raw[i]);
seq_puts(s, "\n");
*count += 1;
}
static int debugfs_evl_show(struct seq_file *s, void *d)
{
struct idxd_device *idxd = s->private;
struct idxd_evl *evl = idxd->evl;
union evl_status_reg evl_status;
u16 h, t, evl_size, i;
int count = 0;
bool processed = true;
if (!evl || !evl->log)
return 0;
mutex_lock(&evl->lock);
evl_status.bits = ioread64(idxd->reg_base + IDXD_EVLSTATUS_OFFSET);
t = evl_status.tail;
h = evl_status.head;
evl_size = evl->size;
seq_printf(s, "Event Log head %u tail %u interrupt pending %u\n\n",
evl_status.head, evl_status.tail, evl_status.int_pending);
i = t;
while (1) {
i = (i + 1) % evl_size;
if (i == t)
break;
if (processed && i == h)
processed = false;
dump_event_entry(idxd, s, i, &count, processed);
}
mutex_unlock(&evl->lock);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(debugfs_evl);
int idxd_device_init_debugfs(struct idxd_device *idxd)
{
if (IS_ERR_OR_NULL(idxd_debugfs_dir))
return 0;
idxd->dbgfs_dir = debugfs_create_dir(dev_name(idxd_confdev(idxd)), idxd_debugfs_dir);
if (IS_ERR(idxd->dbgfs_dir))
return PTR_ERR(idxd->dbgfs_dir);
if (idxd->evl) {
idxd->dbgfs_evl_file = debugfs_create_file("event_log", 0400,
idxd->dbgfs_dir, idxd,
&debugfs_evl_fops);
if (IS_ERR(idxd->dbgfs_evl_file)) {
debugfs_remove_recursive(idxd->dbgfs_dir);
idxd->dbgfs_dir = NULL;
return PTR_ERR(idxd->dbgfs_evl_file);
}
}
return 0;
}
void idxd_device_remove_debugfs(struct idxd_device *idxd)
{
debugfs_remove_recursive(idxd->dbgfs_dir);
}
int idxd_init_debugfs(void)
{
if (!debugfs_initialized())
return 0;
idxd_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
if (IS_ERR(idxd_debugfs_dir))
return PTR_ERR(idxd_debugfs_dir);
return 0;
}
void idxd_remove_debugfs(void)
{
debugfs_remove_recursive(idxd_debugfs_dir);
}
|
