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
219
220
221
222
223
224
225
226
227
|
/*
* sysmemmgr_ioctl.c
*
* This file implements all the ioctl operations required on the sysmemmgr
* module.
*
* Copyright (C) 2008-2009 Texas Instruments, Inc.
*
* This package 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 PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
/* Standard headers */
#include <linux/types.h>
/* Linux headers */
#include <linux/uaccess.h>
#include <linux/bug.h>
#include <linux/fs.h>
#include <linux/mm.h>
/* Module Headers */
#include <sysmemmgr.h>
#include <sysmemmgr_ioctl.h>
/*
* ======== sysmemmgr_ioctl_get_config ========
* Purpose:
* This ioctl interface to sysmemmgr_get_config function
*/
static inline int sysmemmgr_ioctl_get_config(struct sysmemmgr_cmd_args *cargs)
{
s32 retval = 0;
unsigned long size;
struct sysmemmgr_config config;
sysmemmgr_get_config(&config);
size = copy_to_user(cargs->args.get_config.config, &config,
sizeof(struct sysmemmgr_config));
if (size) {
retval = -EFAULT;
goto exit;
}
cargs->api_status = 0;
exit:
return retval;
}
/*
* ======== sysmemmgr_ioctl_setup ========
* Purpose:
* This ioctl interface to sysmemmgr_setup function
*/
static inline int sysmemmgr_ioctl_setup(struct sysmemmgr_cmd_args *cargs)
{
s32 retval = 0;
unsigned long size;
struct sysmemmgr_config config;
if (cargs->args.setup.config == NULL) {
cargs->api_status = sysmemmgr_setup(NULL);
goto exit;
}
size = copy_from_user(&config, cargs->args.setup.config,
sizeof(struct sysmemmgr_config));
if (size) {
retval = -EFAULT;
goto exit;
}
cargs->api_status = sysmemmgr_setup(&config);
exit:
return retval;
}
/*
* ======== sysmemmgr_ioctl_destroy ========
* Purpose:
* This ioctl interface to sysmemmgr_destroy function
*/
static inline int sysmemmgr_ioctl_destroy(struct sysmemmgr_cmd_args *cargs)
{
cargs->api_status = sysmemmgr_destroy();
return 0;
}
/*
* ======== sysmemmgr_ioctl_alloc ========
* Purpose:
* This ioctl interface to sysmemmgr_alloc function
*/
static inline int sysmemmgr_ioctl_alloc(struct sysmemmgr_cmd_args *cargs)
{
void *kbuf = NULL;
void *phys = NULL;
kbuf = sysmemmgr_alloc(cargs->args.alloc.size,
cargs->args.alloc.flags);
if (unlikely(kbuf == NULL))
goto exit;
/* If the flag is not virtually contiguous */
if (cargs->args.alloc.flags != sysmemmgr_allocflag_virtual)
phys = sysmemmgr_translate(kbuf, sysmemmgr_xltflag_kvirt2phys);
cargs->api_status = 0;
exit:
cargs->args.alloc.kbuf = kbuf;
cargs->args.alloc.kbuf = phys;
return 0;
}
/*
* ======== sysmemmgr_ioctl_free ========
* Purpose:
* This ioctl interface to sysmemmgr_free function
*/
static inline int sysmemmgr_ioctl_free(struct sysmemmgr_cmd_args *cargs)
{
cargs->api_status = sysmemmgr_free(cargs->args.free.kbuf,
cargs->args.free.size,
cargs->args.alloc.flags);
return 0;
}
/*
* ======== sysmemmgr_ioctl_translate ========
* Purpose:
* This ioctl interface to sysmemmgr_translate function
*/
static inline int sysmemmgr_ioctl_translate(struct sysmemmgr_cmd_args *cargs)
{
cargs->args.translate.ret_ptr = sysmemmgr_translate(
cargs->args.translate.buf,
cargs->args.translate.flags);
WARN_ON(cargs->args.translate.ret_ptr == NULL);
cargs->api_status = 0;
return 0;
}
/*
* ======== sysmemmgr_ioctl ========
* Purpose:
* ioctl interface function for sysmemmgr module
*/
int sysmemmgr_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long args)
{
int os_status = 0;
struct sysmemmgr_cmd_args __user *uarg =
(struct sysmemmgr_cmd_args __user *)args;
struct sysmemmgr_cmd_args cargs;
unsigned long size;
if (_IOC_DIR(cmd) & _IOC_READ)
os_status = !access_ok(VERIFY_WRITE, uarg, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) & _IOC_WRITE)
os_status = !access_ok(VERIFY_READ, uarg, _IOC_SIZE(cmd));
if (os_status) {
os_status = -EFAULT;
goto exit;
}
/* Copy the full args from user-side */
size = copy_from_user(&cargs, uarg, sizeof(struct sysmemmgr_cmd_args));
if (size) {
os_status = -EFAULT;
goto exit;
}
switch (cmd) {
case CMD_SYSMEMMGR_GETCONFIG:
os_status = sysmemmgr_ioctl_get_config(&cargs);
break;
case CMD_SYSMEMMGR_SETUP:
os_status = sysmemmgr_ioctl_setup(&cargs);
break;
case CMD_SYSMEMMGR_DESTROY:
os_status = sysmemmgr_ioctl_destroy(&cargs);
break;
case CMD_SYSMEMMGR_ALLOC:
os_status = sysmemmgr_ioctl_alloc(&cargs);
break;
case CMD_SYSMEMMGR_FREE:
os_status = sysmemmgr_ioctl_free(&cargs);
break;
case CMD_SYSMEMMGR_TRANSLATE:
os_status = sysmemmgr_ioctl_translate(&cargs);
break;
default:
WARN_ON(cmd);
os_status = -ENOTTY;
break;
}
if ((cargs.api_status == -ERESTARTSYS) || (cargs.api_status == -EINTR))
os_status = -ERESTARTSYS;
if (os_status < 0)
goto exit;
/* Copy the full args to the user-side. */
size = copy_to_user(uarg, &cargs, sizeof(struct sysmemmgr_cmd_args));
if (size) {
os_status = -EFAULT;
goto exit;
}
exit:
return os_status;
}
|
