mirror of
https://github.com/revyos/thead-kernel.git
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67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
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*/
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#ifndef __VS_DRV_H__
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#define __VS_DRV_H__
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/version.h>
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#include <drm/drm_gem.h>
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#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 0)
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#include <drm/drmP.h>
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#endif
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#include "vs_plane.h"
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#ifdef CONFIG_VERISILICON_MMU
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#include "vs_dc_mmu.h"
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#endif
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/*
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*
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* @dma_dev: device for DMA API.
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* - use the first attached device if support iommu
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else use drm device (only contiguous buffer support)
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* @domain: iommu domain for DRM.
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* - all DC IOMMU share same domain to reduce mapping
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* @pitch_alignment: buffer pitch alignment required by sub-devices.
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*
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*/
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struct vs_drm_private {
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struct device *dma_dev;
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struct iommu_domain *domain;
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#ifdef CONFIG_VERISILICON_MMU
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dc_mmu *mmu;
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#endif
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unsigned int pitch_alignment;
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};
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int vs_drm_iommu_attach_device(struct drm_device *drm_dev,
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struct device *dev);
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void vs_drm_iommu_detach_device(struct drm_device *drm_dev,
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struct device *dev);
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void vs_drm_update_pitch_alignment(struct drm_device *drm_dev,
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unsigned int alignment);
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static inline struct device *to_dma_dev(struct drm_device *dev)
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{
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struct vs_drm_private *priv = dev->dev_private;
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return priv->dma_dev;
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}
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static inline bool is_iommu_enabled(struct drm_device *dev)
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{
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struct vs_drm_private *priv = dev->dev_private;
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return priv->domain != NULL ? true : false;
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}
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#endif /* __VS_DRV_H__ */
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