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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Intel MIC Coprocessor State Management (COSM) Driver
*
*/
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/io.h>
#include "cosm_main.h"
/* Debugfs parent dir */
static struct dentry *cosm_dbg;
/**
* cosm_log_buf_show - Display MIC kernel log buffer
*
* log_buf addr/len is read from System.map by user space
* and populated in sysfs entries.
*/
static int cosm_log_buf_show(struct seq_file *s, void *unused)
{
void __iomem *log_buf_va;
int __iomem *log_buf_len_va;
struct cosm_device *cdev = s->private;
void *kva;
int size;
u64 aper_offset;
if (!cdev || !cdev->log_buf_addr || !cdev->log_buf_len)
goto done;
mutex_lock(&cdev->cosm_mutex);
switch (cdev->state) {
case MIC_BOOTING:
case MIC_ONLINE:
case MIC_SHUTTING_DOWN:
break;
default:
goto unlock;
}
/*
* Card kernel will never be relocated and any kernel text/data mapping
* can be translated to phys address by subtracting __START_KERNEL_map.
*/
aper_offset = (u64)cdev->log_buf_len - __START_KERNEL_map;
log_buf_len_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
aper_offset = (u64)cdev->log_buf_addr - __START_KERNEL_map;
log_buf_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
size = ioread32(log_buf_len_va);
kva = kmalloc(size, GFP_KERNEL);
if (!kva)
goto unlock;
memcpy_fromio(kva, log_buf_va, size);
seq_write(s, kva, size);
kfree(kva);
unlock:
mutex_unlock(&cdev->cosm_mutex);
done:
return 0;
}
static int cosm_log_buf_open(struct inode *inode, struct file *file)
{
return single_open(file, cosm_log_buf_show, inode->i_private);
}
static const struct file_operations log_buf_ops = {
.owner = THIS_MODULE,
.open = cosm_log_buf_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release
};
/**
* cosm_force_reset_show - Force MIC reset
*
* Invokes the force_reset COSM bus op instead of the standard reset
* op in case a force reset of the MIC device is required
*/
static int cosm_force_reset_show(struct seq_file *s, void *pos)
{
struct cosm_device *cdev = s->private;
cosm_stop(cdev, true);
return 0;
}
static int cosm_force_reset_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, cosm_force_reset_show, inode->i_private);
}
static const struct file_operations force_reset_ops = {
.owner = THIS_MODULE,
.open = cosm_force_reset_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release
};
void cosm_create_debug_dir(struct cosm_device *cdev)
{
char name[16];
if (!cosm_dbg)
return;
scnprintf(name, sizeof(name), "mic%d", cdev->index);
cdev->dbg_dir = debugfs_create_dir(name, cosm_dbg);
if (!cdev->dbg_dir)
return;
debugfs_create_file("log_buf", 0444, cdev->dbg_dir, cdev, &log_buf_ops);
debugfs_create_file("force_reset", 0444, cdev->dbg_dir, cdev,
&force_reset_ops);
}
void cosm_delete_debug_dir(struct cosm_device *cdev)
{
if (!cdev->dbg_dir)
return;
debugfs_remove_recursive(cdev->dbg_dir);
}
void cosm_init_debugfs(void)
{
cosm_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
if (!cosm_dbg)
pr_err("can't create debugfs dir\n");
}
void cosm_exit_debugfs(void)
{
debugfs_remove(cosm_dbg);
}
|
