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
|
/*
* 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/module.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/mei_cl_bus.h>
#include "mei_dev.h"
#define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
{
struct mei_cl_device *device = to_mei_cl_device(dev);
struct mei_cl_driver *driver = to_mei_cl_driver(drv);
const struct mei_cl_device_id *id;
if (!device)
return 0;
if (!driver || !driver->id_table)
return 0;
id = driver->id_table;
while (id->name[0]) {
if (!strcmp(dev_name(dev), id->name))
return 1;
id++;
}
return 0;
}
static int mei_cl_device_probe(struct device *dev)
{
struct mei_cl_device *device = to_mei_cl_device(dev);
struct mei_cl_driver *driver;
struct mei_cl_device_id id;
if (!device)
return 0;
driver = to_mei_cl_driver(dev->driver);
if (!driver || !driver->probe)
return -ENODEV;
dev_dbg(dev, "Device probe\n");
strncpy(id.name, dev_name(dev), MEI_CL_NAME_SIZE);
return driver->probe(device, &id);
}
static int mei_cl_device_remove(struct device *dev)
{
struct mei_cl_device *device = to_mei_cl_device(dev);
struct mei_cl_driver *driver;
if (!device || !dev->driver)
return 0;
driver = to_mei_cl_driver(dev->driver);
if (!driver->remove) {
dev->driver = NULL;
return 0;
}
return driver->remove(device);
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
char *buf)
{
int len;
len = snprintf(buf, PAGE_SIZE, "mei:%s\n", dev_name(dev));
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
static struct device_attribute mei_cl_dev_attrs[] = {
__ATTR_RO(modalias),
__ATTR_NULL,
};
static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
{
if (add_uevent_var(env, "MODALIAS=mei:%s", dev_name(dev)))
return -ENOMEM;
return 0;
}
static struct bus_type mei_cl_bus_type = {
.name = "mei",
.dev_attrs = mei_cl_dev_attrs,
.match = mei_cl_device_match,
.probe = mei_cl_device_probe,
.remove = mei_cl_device_remove,
.uevent = mei_cl_uevent,
};
static void mei_cl_dev_release(struct device *dev)
{
kfree(to_mei_cl_device(dev));
}
static struct device_type mei_cl_device_type = {
.release = mei_cl_dev_release,
};
struct mei_cl_device *mei_cl_add_device(struct mei_device *mei_device,
uuid_le uuid, char *name)
{
struct mei_cl_device *device;
int status;
device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
if (!device)
return NULL;
device->dev.parent = &mei_device->pdev->dev;
device->dev.bus = &mei_cl_bus_type;
device->dev.type = &mei_cl_device_type;
dev_set_name(&device->dev, "%s", name);
status = device_register(&device->dev);
if (status)
goto out_err;
dev_dbg(&device->dev, "client %s registered\n", name);
return device;
out_err:
dev_err(device->dev.parent, "Failed to register MEI client\n");
kfree(device);
return NULL;
}
EXPORT_SYMBOL_GPL(mei_cl_add_device);
void mei_cl_remove_device(struct mei_cl_device *device)
{
device_unregister(&device->dev);
}
EXPORT_SYMBOL_GPL(mei_cl_remove_device);
|
