/**
|
* Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd
|
* author: Jung Zhao jung.zhao@rock-chips.com
|
* Randy Li, randy.li@rock-chips.com
|
*
|
* This software is licensed under the terms of the GNU General Public
|
* License version 2, as published by the Free Software Foundation, and
|
* may be copied, distributed, and modified under those terms.
|
*
|
* This program is distributed in the hope that it will be useful,
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
* GNU General Public License for more details.
|
*
|
*/
|
|
#include <linux/slab.h>
|
|
#include "iep_iommu_ops.h"
|
|
static
|
struct iep_iommu_session_info *iep_iommu_get_session_info
|
(struct iep_iommu_info *iommu_info, struct iep_session *session)
|
{
|
struct iep_iommu_session_info *session_info = NULL, *n;
|
|
list_for_each_entry_safe(session_info, n, &iommu_info->session_list,
|
head) {
|
if (session_info->session == session)
|
return session_info;
|
}
|
|
return NULL;
|
}
|
|
int iep_iommu_create(struct iep_iommu_info *iommu_info)
|
{
|
if (!iommu_info || !iommu_info->ops || !iommu_info->ops->create)
|
return -EINVAL;
|
|
return iommu_info->ops->create(iommu_info);
|
}
|
|
int iep_iommu_import(struct iep_iommu_info *iommu_info,
|
struct iep_session *session, int fd)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info || !iommu_info->ops ||
|
!iommu_info->ops->import || !session)
|
return -EINVAL;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
if (!session_info) {
|
session_info = kzalloc(sizeof(*session_info), GFP_KERNEL);
|
if (!session_info)
|
return -ENOMEM;
|
|
INIT_LIST_HEAD(&session_info->head);
|
INIT_LIST_HEAD(&session_info->buffer_list);
|
mutex_init(&session_info->list_mutex);
|
session_info->max_idx = 0;
|
session_info->session = session;
|
session_info->mmu_dev = iommu_info->mmu_dev;
|
session_info->dev = iommu_info->dev;
|
session_info->iommu_info = iommu_info;
|
session_info->buffer_nums = 0;
|
mutex_lock(&iommu_info->list_mutex);
|
list_add_tail(&session_info->head, &iommu_info->session_list);
|
mutex_unlock(&iommu_info->list_mutex);
|
}
|
|
session_info->debug_level = iommu_info->debug_level;
|
|
return iommu_info->ops->import(session_info, fd);
|
}
|
|
int iep_iommu_free(struct iep_iommu_info *iommu_info,
|
struct iep_session *session, int idx)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return -EINVAL;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->free || !session_info)
|
return -EINVAL;
|
|
return iommu_info->ops->free(session_info, idx);
|
}
|
|
int iep_iommu_free_fd(struct iep_iommu_info *iommu_info,
|
struct iep_session *session, int fd)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return -EINVAL;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->free_fd || !session_info)
|
return -EINVAL;
|
|
return iommu_info->ops->free_fd(session_info, fd);
|
}
|
|
int iep_iommu_map_iommu(struct iep_iommu_info *iommu_info,
|
struct iep_session *session,
|
int idx, unsigned long *iova,
|
unsigned long *size)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return -EINVAL;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->map_iommu || !session_info)
|
return -EINVAL;
|
|
return iommu_info->ops->map_iommu(session_info, idx, iova, size);
|
}
|
|
int iep_iommu_unmap_iommu(struct iep_iommu_info *iommu_info,
|
struct iep_session *session, int idx)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return -EINVAL;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->unmap_iommu || !session_info)
|
return -EINVAL;
|
|
return iommu_info->ops->unmap_iommu(session_info, idx);
|
}
|
|
int iep_iommu_destroy(struct iep_iommu_info *iommu_info)
|
{
|
if (!iommu_info || !iommu_info->ops || !iommu_info->ops->destroy)
|
return -EINVAL;
|
|
return iommu_info->ops->destroy(iommu_info);
|
}
|
|
void iep_iommu_dump(struct iep_iommu_info *iommu_info,
|
struct iep_session *session)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->dump || !session_info)
|
return;
|
|
iommu_info->ops->dump(session_info);
|
}
|
|
void iep_iommu_clear(struct iep_iommu_info *iommu_info,
|
struct iep_session *session)
|
{
|
struct iep_iommu_session_info *session_info = NULL;
|
|
if (!iommu_info)
|
return;
|
|
session_info = iep_iommu_get_session_info(iommu_info, session);
|
|
if (!iommu_info->ops || !iommu_info->ops->clear || !session_info)
|
return;
|
|
iommu_info->ops->clear(session_info);
|
|
mutex_lock(&iommu_info->list_mutex);
|
list_del_init(&session_info->head);
|
kfree(session_info);
|
mutex_unlock(&iommu_info->list_mutex);
|
}
|
|
int iep_iommu_attach(struct iep_iommu_info *iommu_info)
|
{
|
if (!iommu_info || !iommu_info->ops || !iommu_info->ops->attach)
|
return 0;
|
|
return iommu_info->ops->attach(iommu_info);
|
}
|
|
void iep_iommu_detach(struct iep_iommu_info *iommu_info)
|
{
|
if (!iommu_info || !iommu_info->ops || !iommu_info->ops->detach)
|
return;
|
|
return iommu_info->ops->detach(iommu_info);
|
}
|
|
struct iep_iommu_info *
|
iep_iommu_info_create(struct device *dev,
|
struct device *mmu_dev,
|
int alloc_type)
|
{
|
struct iep_iommu_info *iommu_info = NULL;
|
|
iommu_info = kzalloc(sizeof(*iommu_info), GFP_KERNEL);
|
if (!iommu_info)
|
return NULL;
|
|
iommu_info->dev = dev;
|
INIT_LIST_HEAD(&iommu_info->session_list);
|
mutex_init(&iommu_info->list_mutex);
|
mutex_init(&iommu_info->iommu_mutex);
|
switch (alloc_type) {
|
#ifdef CONFIG_DRM
|
case ALLOCATOR_USE_DRM:
|
iep_iommu_drm_set_ops(iommu_info);
|
break;
|
#endif
|
default:
|
iommu_info->ops = NULL;
|
break;
|
}
|
|
iommu_info->mmu_dev = mmu_dev;
|
|
iep_iommu_create(iommu_info);
|
|
return iommu_info;
|
}
|
|
int iep_iommu_info_destroy(struct iep_iommu_info *iommu_info)
|
{
|
iep_iommu_destroy(iommu_info);
|
kfree(iommu_info);
|
|
return 0;
|
}
|
