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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2012-2013, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/mei.h>
#include "mei_dev.h"
#include "client.h"
#include "hw.h"
static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct mei_device *dev = fp->private_data;
struct mei_me_client *me_cl;
size_t bufsz = 1;
char *buf;
int i = 0;
int pos = 0;
int ret;
#define HDR \
" |id|fix| UUID |con|msg len|sb|refc|\n"
down_read(&dev->me_clients_rwsem);
list_for_each_entry(me_cl, &dev->me_clients, list)
bufsz++;
bufsz *= sizeof(HDR) + 1;
buf = kzalloc(bufsz, GFP_KERNEL);
if (!buf) {
up_read(&dev->me_clients_rwsem);
return -ENOMEM;
}
pos += scnprintf(buf + pos, bufsz - pos, HDR);
/* if the driver is not enabled the list won't be consistent */
if (dev->dev_state != MEI_DEV_ENABLED)
goto out;
list_for_each_entry(me_cl, &dev->me_clients, list) {
if (mei_me_cl_get(me_cl)) {
pos += scnprintf(buf + pos, bufsz - pos,
"%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n",
i++, me_cl->client_id,
me_cl->props.fixed_address,
&me_cl->props.protocol_name,
me_cl->props.max_number_of_connections,
me_cl->props.max_msg_length,
me_cl->props.single_recv_buf,
atomic_read(&me_cl->refcnt.refcount));
mei_me_cl_put(me_cl);
}
}
out:
up_read(&dev->me_clients_rwsem);
ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
kfree(buf);
return ret;
}
static const struct file_operations mei_dbgfs_fops_meclients = {
.open = simple_open,
.read = mei_dbgfs_read_meclients,
.llseek = generic_file_llseek,
};
static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct mei_device *dev = fp->private_data;
struct mei_cl *cl;
const size_t bufsz = 1024;
char *buf;
int i = 0;
int pos = 0;
int ret;
if (!dev)
return -ENODEV;
buf = kzalloc(bufsz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
pos += scnprintf(buf + pos, bufsz - pos,
" |me|host|state|rd|wr|\n");
mutex_lock(&dev->device_lock);
/* if the driver is not enabled the list won't be consistent */
if (dev->dev_state != MEI_DEV_ENABLED)
goto out;
list_for_each_entry(cl, &dev->file_list, link) {
pos += scnprintf(buf + pos, bufsz - pos,
"%2d|%2d|%4d|%5d|%2d|%2d|\n",
i, cl->me_client_id, cl->host_client_id, cl->state,
cl->reading_state, cl->writing_state);
i++;
}
out:
mutex_unlock(&dev->device_lock);
ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
kfree(buf);
return ret;
}
static const struct file_operations mei_dbgfs_fops_active = {
.open = simple_open,
.read = mei_dbgfs_read_active,
.llseek = generic_file_llseek,
};
static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct mei_device *dev = fp->private_data;
const size_t bufsz = 1024;
char *buf = kzalloc(bufsz, GFP_KERNEL);
int pos = 0;
int ret;
if (!buf)
return -ENOMEM;
pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n",
mei_dev_state_str(dev->dev_state));
pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n",
mei_hbm_state_str(dev->hbm_state));
pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
mei_pg_state_str(mei_pg_state(dev)));
ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
kfree(buf);
return ret;
}
static const struct file_operations mei_dbgfs_fops_devstate = {
.open = simple_open,
.read = mei_dbgfs_read_devstate,
.llseek = generic_file_llseek,
};
/**
* mei_dbgfs_deregister - Remove the debugfs files and directories
*
* @dev: the mei device structure
*/
void mei_dbgfs_deregister(struct mei_device *dev)
{
if (!dev->dbgfs_dir)
return;
debugfs_remove_recursive(dev->dbgfs_dir);
dev->dbgfs_dir = NULL;
}
/**
* mei_dbgfs_register - Add the debugfs files
*
* @dev: the mei device structure
* @name: the mei device name
*
* Return: 0 on success, <0 on failure.
*/
int mei_dbgfs_register(struct mei_device *dev, const char *name)
{
struct dentry *dir, *f;
dir = debugfs_create_dir(name, NULL);
if (!dir)
return -ENOMEM;
f = debugfs_create_file("meclients", S_IRUSR, dir,
dev, &mei_dbgfs_fops_meclients);
if (!f) {
dev_err(dev->dev, "meclients: registration failed\n");
goto err;
}
f = debugfs_create_file("active", S_IRUSR, dir,
dev, &mei_dbgfs_fops_active);
if (!f) {
dev_err(dev->dev, "meclients: registration failed\n");
goto err;
}
f = debugfs_create_file("devstate", S_IRUSR, dir,
dev, &mei_dbgfs_fops_devstate);
if (!f) {
dev_err(dev->dev, "devstate: registration failed\n");
goto err;
}
dev->dbgfs_dir = dir;
return 0;
err:
mei_dbgfs_deregister(dev);
return -ENODEV;
}
|
