mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-26 20:44:32 +08:00
fc2e013f78
Every CRTC drivers in Exynos DRM implements the code which checks whether IOMMU is supported or not, and if supported enable it. Making new helper for it generalize each CRTC drivers. Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/* exynos_drm_iommu.h
|
|
*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* Authoer: Inki Dae <inki.dae@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#ifndef _EXYNOS_DRM_IOMMU_H_
|
|
#define _EXYNOS_DRM_IOMMU_H_
|
|
|
|
#define EXYNOS_DEV_ADDR_START 0x20000000
|
|
#define EXYNOS_DEV_ADDR_SIZE 0x40000000
|
|
|
|
#ifdef CONFIG_DRM_EXYNOS_IOMMU
|
|
|
|
int drm_create_iommu_mapping(struct drm_device *drm_dev);
|
|
|
|
void drm_release_iommu_mapping(struct drm_device *drm_dev);
|
|
|
|
int drm_iommu_attach_device(struct drm_device *drm_dev,
|
|
struct device *subdrv_dev);
|
|
|
|
void drm_iommu_detach_device(struct drm_device *dev_dev,
|
|
struct device *subdrv_dev);
|
|
|
|
static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
|
|
{
|
|
#ifdef CONFIG_ARM_DMA_USE_IOMMU
|
|
struct device *dev = drm_dev->dev;
|
|
|
|
return dev->archdata.mapping ? true : false;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
int drm_iommu_attach_device_if_possible(
|
|
struct exynos_drm_crtc *exynos_crtc, struct drm_device *drm_dev,
|
|
struct device *subdrv_dev);
|
|
|
|
#else
|
|
|
|
static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
|
|
{
|
|
}
|
|
|
|
static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
|
|
struct device *subdrv_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
|
|
struct device *subdrv_dev)
|
|
{
|
|
}
|
|
|
|
static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int drm_iommu_attach_device_if_possible(
|
|
struct exynos_drm_crtc *exynos_crtc, struct drm_device *drm_dev,
|
|
struct device *subdrv_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
#endif
|