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