utgard/r10p0/linux/mali_ukk_mem.c - manifest_repos/mali-driver - Git at Google

 /*
  * Copyright (C) 2010-2016 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.
  */
 #include <linux/fs.h>       /* file system operations */
 #include <linux/version.h>
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)
 #include <linux/uaccess.h>
 #else
 #include <asm/uaccess.h>
 #endif

 #include "mali_ukk.h"
 #include "mali_osk.h"
 #include "mali_kernel_common.h"
 #include "mali_session.h"
 #include "mali_ukk_wrappers.h"

 int mem_alloc_wrapper(struct mali_session_data *session_data, _mali_uk_alloc_mem_s __user *uargs)
 {
 	_mali_uk_alloc_mem_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_alloc_mem_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_allocate(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		MALI_PRINT_ERROR(("_mali_ukk_mem_allocate return ERROR\n"));
 		return map_errcode(err);
 	}

 	if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) {
 		return -EFAULT;
 	}

 	return 0;
 }

 int mem_free_wrapper(struct mali_session_data *session_data, _mali_uk_free_mem_s __user *uargs)
 {
 	_mali_uk_free_mem_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_free_mem_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_free(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	if (0 != put_user(kargs.free_pages_nr, &uargs->free_pages_nr)) {
 		return -EFAULT;
 	}

 	return 0;
 }

 int meson_mem_start_wrapper(struct mali_session_data *session_data, _meson_update_video_texture_s __user *uargs)
 {
 	_meson_update_video_texture_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_meson_update_video_texture_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _meson_update_video_texture(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	return 0;
 }

 int mem_bind_wrapper(struct mali_session_data *session_data, _mali_uk_bind_mem_s __user *uargs)
 {
 	_mali_uk_bind_mem_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_bind_mem_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_bind(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	return 0;
 }

 int mem_unbind_wrapper(struct mali_session_data *session_data, _mali_uk_unbind_mem_s __user *uargs)
 {
 	_mali_uk_unbind_mem_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_unbind_mem_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_unbind(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	return 0;
 }


 int mem_cow_wrapper(struct mali_session_data *session_data, _mali_uk_cow_mem_s __user *uargs)
 {
 	_mali_uk_cow_mem_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_mem_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_cow(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) {
 		return -EFAULT;
 	}

 	return 0;
 }

 int mem_cow_modify_range_wrapper(struct mali_session_data *session_data, _mali_uk_cow_modify_range_s __user *uargs)
 {
 	_mali_uk_cow_modify_range_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_modify_range_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_cow_modify_range(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	if (0 != put_user(kargs.change_pages_nr, &uargs->change_pages_nr)) {
 		return -EFAULT;
 	}
 	return 0;
 }


 int mem_resize_mem_wrapper(struct mali_session_data *session_data, _mali_uk_mem_resize_s __user *uargs)
 {
 	_mali_uk_mem_resize_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_resize_s))) {
 		return -EFAULT;
 	}
 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_mem_resize(&kargs);

 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	return 0;
 }

 int mem_write_safe_wrapper(struct mali_session_data *session_data, _mali_uk_mem_write_safe_s __user *uargs)
 {
 	_mali_uk_mem_write_safe_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_write_safe_s))) {
 		return -EFAULT;
 	}

 	kargs.ctx = (uintptr_t)session_data;

 	/* Check if we can access the buffers */
 	if (!access_ok(VERIFY_WRITE, kargs.dest, kargs.size)
 	    || !access_ok(VERIFY_READ, kargs.src, kargs.size)) {
 		return -EINVAL;
 	}

 	/* Check if size wraps */
 	if ((kargs.size + kargs.dest) <= kargs.dest
 	    || (kargs.size + kargs.src) <= kargs.src) {
 		return -EINVAL;
 	}

 	err = _mali_ukk_mem_write_safe(&kargs);
 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	if (0 != put_user(kargs.size, &uargs->size)) {
 		return -EFAULT;
 	}

 	return 0;
 }


 int mem_query_mmu_page_table_dump_size_wrapper(struct mali_session_data *session_data, _mali_uk_query_mmu_page_table_dump_size_s __user *uargs)
 {
 	_mali_uk_query_mmu_page_table_dump_size_s kargs;
 	_mali_osk_errcode_t err;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	kargs.ctx = (uintptr_t)session_data;

 	err = _mali_ukk_query_mmu_page_table_dump_size(&kargs);
 	if (_MALI_OSK_ERR_OK != err) return map_errcode(err);

 	if (0 != put_user(kargs.size, &uargs->size)) return -EFAULT;

 	return 0;
 }

 int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mali_uk_dump_mmu_page_table_s __user *uargs)
 {
 	_mali_uk_dump_mmu_page_table_s kargs;
 	_mali_osk_errcode_t err;
 	void __user *user_buffer;
 	void *buffer = NULL;
 	int rc = -EFAULT;

 	/* validate input */
 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	/* the session_data pointer was validated by caller */

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_dump_mmu_page_table_s)))
 		goto err_exit;

 	user_buffer = (void __user *)(uintptr_t)kargs.buffer;
 	if (!access_ok(VERIFY_WRITE, user_buffer, kargs.size))
 		goto err_exit;

 	/* allocate temporary buffer (kernel side) to store mmu page table info */
 	if (kargs.size <= 0)
 		return -EINVAL;
 	/* Allow at most 8MiB buffers, this is more than enough to dump a fully
 	 * populated page table. */
 	if (kargs.size > SZ_8M)
 		return -EINVAL;

 	buffer = (void *)(uintptr_t)_mali_osk_valloc(kargs.size);
 	if (NULL == buffer) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}

 	kargs.ctx = (uintptr_t)session_data;
 	kargs.buffer = (uintptr_t)buffer;
 	err = _mali_ukk_dump_mmu_page_table(&kargs);
 	if (_MALI_OSK_ERR_OK != err) {
 		rc = map_errcode(err);
 		goto err_exit;
 	}

 	/* copy mmu page table info back to user space and update pointers */
 	if (0 != copy_to_user(user_buffer, buffer, kargs.size))
 		goto err_exit;

 	kargs.register_writes = kargs.register_writes -
 				(uintptr_t)buffer + (uintptr_t)user_buffer;
 	kargs.page_table_dump = kargs.page_table_dump -
 				(uintptr_t)buffer + (uintptr_t)user_buffer;

 	if (0 != copy_to_user(uargs, &kargs, sizeof(kargs)))
 		goto err_exit;

 	rc = 0;

 err_exit:
 	if (buffer) _mali_osk_vfree(buffer);
 	return rc;
 }

 int mem_usage_get_wrapper(struct mali_session_data *session_data, _mali_uk_profiling_memory_usage_get_s __user *uargs)
 {
 	_mali_osk_errcode_t err;
 	_mali_uk_profiling_memory_usage_get_s kargs;

 	MALI_CHECK_NON_NULL(uargs, -EINVAL);
 	MALI_CHECK_NON_NULL(session_data, -EINVAL);

 	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) {
 		return -EFAULT;
 	}

 	kargs.ctx = (uintptr_t)session_data;
 	err = _mali_ukk_mem_usage_get(&kargs);
 	if (_MALI_OSK_ERR_OK != err) {
 		return map_errcode(err);
 	}

 	kargs.ctx = (uintptr_t)NULL; /* prevent kernel address to be returned to user space */
 	if (0 != copy_to_user(uargs, &kargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) {
 		return -EFAULT;
 	}

 	return 0;
 }
	/*
	* Copyright (C) 2010-2016 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.
	*/
	#include <linux/fs.h> /* file system operations */
	#include <linux/version.h>
	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)
	#include <linux/uaccess.h>
	#else
	#include <asm/uaccess.h>
	#endif

	#include "mali_ukk.h"
	#include "mali_osk.h"
	#include "mali_kernel_common.h"
	#include "mali_session.h"
	#include "mali_ukk_wrappers.h"

	int mem_alloc_wrapper(struct mali_session_data session_data, _mali_uk_alloc_mem_s __user uargs)
	{
	_mali_uk_alloc_mem_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_alloc_mem_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_allocate(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	MALI_PRINT_ERROR(("_mali_ukk_mem_allocate return ERROR\n"));
	return map_errcode(err);
	}

	if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) {
	return -EFAULT;
	}

	return 0;
	}

	int mem_free_wrapper(struct mali_session_data session_data, _mali_uk_free_mem_s __user uargs)
	{
	_mali_uk_free_mem_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_free_mem_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_free(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	if (0 != put_user(kargs.free_pages_nr, &uargs->free_pages_nr)) {
	return -EFAULT;
	}

	return 0;
	}

	int meson_mem_start_wrapper(struct mali_session_data session_data, _meson_update_video_texture_s __user uargs)
	{
	_meson_update_video_texture_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_meson_update_video_texture_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _meson_update_video_texture(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	return 0;
	}

	int mem_bind_wrapper(struct mali_session_data session_data, _mali_uk_bind_mem_s __user uargs)
	{
	_mali_uk_bind_mem_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_bind_mem_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_bind(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	return 0;
	}

	int mem_unbind_wrapper(struct mali_session_data session_data, _mali_uk_unbind_mem_s __user uargs)
	{
	_mali_uk_unbind_mem_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_unbind_mem_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_unbind(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	return 0;
	}


	int mem_cow_wrapper(struct mali_session_data session_data, _mali_uk_cow_mem_s __user uargs)
	{
	_mali_uk_cow_mem_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_mem_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_cow(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	if (0 != put_user(kargs.backend_handle, &uargs->backend_handle)) {
	return -EFAULT;
	}

	return 0;
	}

	int mem_cow_modify_range_wrapper(struct mali_session_data session_data, _mali_uk_cow_modify_range_s __user uargs)
	{
	_mali_uk_cow_modify_range_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_cow_modify_range_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_cow_modify_range(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	if (0 != put_user(kargs.change_pages_nr, &uargs->change_pages_nr)) {
	return -EFAULT;
	}
	return 0;
	}


	int mem_resize_mem_wrapper(struct mali_session_data session_data, _mali_uk_mem_resize_s __user uargs)
	{
	_mali_uk_mem_resize_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_resize_s))) {
	return -EFAULT;
	}
	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_mem_resize(&kargs);

	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	return 0;
	}

	int mem_write_safe_wrapper(struct mali_session_data session_data, _mali_uk_mem_write_safe_s __user uargs)
	{
	_mali_uk_mem_write_safe_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_mem_write_safe_s))) {
	return -EFAULT;
	}

	kargs.ctx = (uintptr_t)session_data;

	/* Check if we can access the buffers */
	if (!access_ok(VERIFY_WRITE, kargs.dest, kargs.size)
	\|\| !access_ok(VERIFY_READ, kargs.src, kargs.size)) {
	return -EINVAL;
	}

	/* Check if size wraps */
	if ((kargs.size + kargs.dest) <= kargs.dest
	\|\| (kargs.size + kargs.src) <= kargs.src) {
	return -EINVAL;
	}

	err = _mali_ukk_mem_write_safe(&kargs);
	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	if (0 != put_user(kargs.size, &uargs->size)) {
	return -EFAULT;
	}

	return 0;
	}



	int mem_query_mmu_page_table_dump_size_wrapper(struct mali_session_data session_data, _mali_uk_query_mmu_page_table_dump_size_s __user uargs)
	{
	_mali_uk_query_mmu_page_table_dump_size_s kargs;
	_mali_osk_errcode_t err;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	kargs.ctx = (uintptr_t)session_data;

	err = _mali_ukk_query_mmu_page_table_dump_size(&kargs);
	if (_MALI_OSK_ERR_OK != err) return map_errcode(err);

	if (0 != put_user(kargs.size, &uargs->size)) return -EFAULT;

	return 0;
	}

	int mem_dump_mmu_page_table_wrapper(struct mali_session_data session_data, _mali_uk_dump_mmu_page_table_s __user uargs)
	{
	_mali_uk_dump_mmu_page_table_s kargs;
	_mali_osk_errcode_t err;
	void __user *user_buffer;
	void *buffer = NULL;
	int rc = -EFAULT;

	/* validate input */
	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	/* the session_data pointer was validated by caller */

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_dump_mmu_page_table_s)))
	goto err_exit;

	user_buffer = (void __user *)(uintptr_t)kargs.buffer;
	if (!access_ok(VERIFY_WRITE, user_buffer, kargs.size))
	goto err_exit;

	/* allocate temporary buffer (kernel side) to store mmu page table info */
	if (kargs.size <= 0)
	return -EINVAL;
	/* Allow at most 8MiB buffers, this is more than enough to dump a fully
	* populated page table. */
	if (kargs.size > SZ_8M)
	return -EINVAL;

	buffer = (void *)(uintptr_t)_mali_osk_valloc(kargs.size);
	if (NULL == buffer) {
	rc = -ENOMEM;
	goto err_exit;
	}

	kargs.ctx = (uintptr_t)session_data;
	kargs.buffer = (uintptr_t)buffer;
	err = _mali_ukk_dump_mmu_page_table(&kargs);
	if (_MALI_OSK_ERR_OK != err) {
	rc = map_errcode(err);
	goto err_exit;
	}

	/* copy mmu page table info back to user space and update pointers */
	if (0 != copy_to_user(user_buffer, buffer, kargs.size))
	goto err_exit;

	kargs.register_writes = kargs.register_writes -
	(uintptr_t)buffer + (uintptr_t)user_buffer;
	kargs.page_table_dump = kargs.page_table_dump -
	(uintptr_t)buffer + (uintptr_t)user_buffer;

	if (0 != copy_to_user(uargs, &kargs, sizeof(kargs)))
	goto err_exit;

	rc = 0;

	err_exit:
	if (buffer) _mali_osk_vfree(buffer);
	return rc;
	}

	int mem_usage_get_wrapper(struct mali_session_data session_data, _mali_uk_profiling_memory_usage_get_s __user uargs)
	{
	_mali_osk_errcode_t err;
	_mali_uk_profiling_memory_usage_get_s kargs;

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session_data, -EINVAL);

	if (0 != copy_from_user(&kargs, uargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) {
	return -EFAULT;
	}

	kargs.ctx = (uintptr_t)session_data;
	err = _mali_ukk_mem_usage_get(&kargs);
	if (_MALI_OSK_ERR_OK != err) {
	return map_errcode(err);
	}

	kargs.ctx = (uintptr_t)NULL; /* prevent kernel address to be returned to user space */
	if (0 != copy_to_user(uargs, &kargs, sizeof(_mali_uk_profiling_memory_usage_get_s))) {
	return -EFAULT;
	}

	return 0;
	}