2 * Copyright (C) 2010, 2013-2014 ARM Limited. All rights reserved.
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12 * @file ump_ukk_wrappers.c
13 * Defines the wrapper functions which turn Linux IOCTL calls into _ukk_ calls for the reference implementation
17 #include <asm/uaccess.h> /* user space access */
20 #include "ump_uk_types.h"
22 #include "ump_kernel_common.h"
25 * IOCTL operation; Allocate UMP memory
27 int ump_allocate_wrapper(u32 __user *argument, struct ump_session_data *session_data)
29 _ump_uk_allocate_s user_interaction;
30 _mali_osk_errcode_t err;
32 /* Sanity check input parameters */
33 if (NULL == argument || NULL == session_data) {
34 MSG_ERR(("NULL parameter in ump_ioctl_allocate()\n"));
38 /* Copy the user space memory to kernel space (so we safely can read it) */
39 if (0 != copy_from_user(&user_interaction, argument, sizeof(user_interaction))) {
40 MSG_ERR(("copy_from_user() in ump_ioctl_allocate()\n"));
44 user_interaction.ctx = (void *) session_data;
46 err = _ump_ukk_allocate(&user_interaction);
47 if (_MALI_OSK_ERR_OK != err) {
48 DBG_MSG(1, ("_ump_ukk_allocate() failed in ump_ioctl_allocate()\n"));
49 return map_errcode(err);
51 user_interaction.ctx = NULL;
53 if (0 != copy_to_user(argument, &user_interaction, sizeof(user_interaction))) {
54 /* If the copy fails then we should release the memory. We can use the IOCTL release to accomplish this */
55 _ump_uk_release_s release_args;
57 MSG_ERR(("copy_to_user() failed in ump_ioctl_allocate()\n"));
59 release_args.ctx = (void *) session_data;
60 release_args.secure_id = user_interaction.secure_id;
62 err = _ump_ukk_release(&release_args);
63 if (_MALI_OSK_ERR_OK != err) {
64 MSG_ERR(("_ump_ukk_release() also failed when trying to release newly allocated memory in ump_ioctl_allocate()\n"));
70 return 0; /* success */