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/*
* Copyright (C) 2010-2014 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.
*/
#include <linux/fs.h> /* file system operations */
#include <asm/uaccess.h> /* user space access */
#include "mali_ukk.h"
#include "mali_osk.h"
#include "mali_kernel_common.h"
#include "mali_session.h"
#include "mali_ukk_wrappers.h"
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_map_ext_wrapper(struct mali_session_data *session_data, _mali_uk_map_external_mem_s __user *argument)
{
_mali_uk_map_external_mem_s uk_args;
_mali_osk_errcode_t err_code;
/* validate input */
/* the session_data pointer was validated by caller */
MALI_CHECK_NON_NULL(argument, -EINVAL);
/* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
if (0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_map_external_mem_s))) {
return -EFAULT;
}
uk_args.ctx = (uintptr_t)session_data;
err_code = _mali_ukk_map_external_mem(&uk_args);
if (0 != put_user(uk_args.cookie, &argument->cookie)) {
if (_MALI_OSK_ERR_OK == err_code) {
/* Rollback */
_mali_uk_unmap_external_mem_s uk_args_unmap;
uk_args_unmap.ctx = (uintptr_t)session_data;
uk_args_unmap.cookie = uk_args.cookie;
err_code = _mali_ukk_unmap_external_mem(&uk_args_unmap);
if (_MALI_OSK_ERR_OK != err_code) {
MALI_DEBUG_PRINT(4, ("reverting _mali_ukk_unmap_external_mem, as a result of failing put_user(), failed\n"));
}
}
return -EFAULT;
}
/* Return the error that _mali_ukk_free_big_block produced */
return map_errcode(err_code);
}
int mem_unmap_ext_wrapper(struct mali_session_data *session_data, _mali_uk_unmap_external_mem_s __user *argument)
{
_mali_uk_unmap_external_mem_s uk_args;
_mali_osk_errcode_t err_code;
/* validate input */
/* the session_data pointer was validated by caller */
MALI_CHECK_NON_NULL(argument, -EINVAL);
/* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
if (0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_unmap_external_mem_s))) {
return -EFAULT;
}
uk_args.ctx = (uintptr_t)session_data;
err_code = _mali_ukk_unmap_external_mem(&uk_args);
/* Return the error that _mali_ukk_free_big_block produced */
return map_errcode(err_code);
}
#if defined(CONFIG_MALI400_UMP)
int mem_release_ump_wrapper(struct mali_session_data *session_data, _mali_uk_release_ump_mem_s __user *argument)
{
_mali_uk_release_ump_mem_s uk_args;
_mali_osk_errcode_t err_code;
/* validate input */
/* the session_data pointer was validated by caller */
MALI_CHECK_NON_NULL(argument, -EINVAL);
/* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
if (0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_release_ump_mem_s))) {
return -EFAULT;
}
uk_args.ctx = (uintptr_t)session_data;
err_code = _mali_ukk_release_ump_mem(&uk_args);
/* Return the error that _mali_ukk_free_big_block produced */
return map_errcode(err_code);
}
int mem_attach_ump_wrapper(struct mali_session_data *session_data, _mali_uk_attach_ump_mem_s __user *argument)
{
_mali_uk_attach_ump_mem_s uk_args;
_mali_osk_errcode_t err_code;
/* validate input */
/* the session_data pointer was validated by caller */
MALI_CHECK_NON_NULL(argument, -EINVAL);
/* get call arguments from user space. copy_from_user returns how many bytes which where NOT copied */
if (0 != copy_from_user(&uk_args, (void __user *)argument, sizeof(_mali_uk_attach_ump_mem_s))) {
return -EFAULT;
}
uk_args.ctx = (uintptr_t)session_data;
err_code = _mali_ukk_attach_ump_mem(&uk_args);
if (0 != put_user(uk_args.cookie, &argument->cookie)) {
if (_MALI_OSK_ERR_OK == err_code) {
/* Rollback */
_mali_uk_release_ump_mem_s uk_args_unmap;
uk_args_unmap.ctx = (uintptr_t)session_data;
uk_args_unmap.cookie = uk_args.cookie;
err_code = _mali_ukk_release_ump_mem(&uk_args_unmap);
if (_MALI_OSK_ERR_OK != err_code) {
MALI_DEBUG_PRINT(4, ("reverting _mali_ukk_attach_mem, as a result of failing put_user(), failed\n"));
}
}
return -EFAULT;
}
/* Return the error that _mali_ukk_map_external_ump_mem produced */
return map_errcode(err_code);
}
#endif /* CONFIG_MALI400_UMP */
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;
}
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