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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Tegra host1x GEM implementation
*
* Copyright (c) 2012-2013, NVIDIA Corporation.
*/
#ifndef __HOST1X_GEM_H
#define __HOST1X_GEM_H
#include <linux/host1x.h>
#include <drm/drm.h>
#include <drm/drm_gem.h>
#define TEGRA_BO_BOTTOM_UP (1 << 0)
enum tegra_bo_tiling_mode {
TEGRA_BO_TILING_MODE_PITCH,
TEGRA_BO_TILING_MODE_TILED,
TEGRA_BO_TILING_MODE_BLOCK,
};
enum tegra_bo_sector_layout {
TEGRA_BO_SECTOR_LAYOUT_TEGRA,
TEGRA_BO_SECTOR_LAYOUT_GPU,
};
struct tegra_bo_tiling {
enum tegra_bo_tiling_mode mode;
unsigned long value;
enum tegra_bo_sector_layout sector_layout;
};
/*
* How memory is referenced within a tegra_bo:
*
* Buffer source | Mapping API(*) | Fields
* ---------------+-----------------+---------------
* Allocated here | DMA API | iova (IOVA mapped to drm->dev), vaddr (CPU VA)
*
* Allocated here | IOMMU API | pages/num_pages (Phys. memory), sgt (Mapped to drm->dev),
* | iova/size (Mapped to domain)
*
* Imported | DMA API | dma_buf (Imported dma_buf)
*
* Imported | IOMMU API | dma_buf (Imported dma_buf),
* | gem->import_attach (Attachment on drm->dev),
* | sgt (Mapped to drm->dev)
* | iova/size (Mapped to domain)
*
* (*) If tegra->domain is set, i.e. TegraDRM IOMMU domain is directly managed through IOMMU API,
* this is IOMMU API. Otherwise DMA API.
*/
struct tegra_bo {
struct drm_gem_object gem;
struct host1x_bo base;
unsigned long flags;
struct sg_table *sgt;
dma_addr_t iova;
void *vaddr;
struct dma_buf *dma_buf;
struct drm_mm_node *mm;
unsigned long num_pages;
struct page **pages;
/* size of IOMMU mapping */
size_t size;
struct tegra_bo_tiling tiling;
};
static inline struct tegra_bo *to_tegra_bo(struct drm_gem_object *gem)
{
return container_of(gem, struct tegra_bo, gem);
}
static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo)
{
return container_of(bo, struct tegra_bo, base);
}
struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size,
unsigned long flags);
struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
struct drm_device *drm,
size_t size,
unsigned long flags,
u32 *handle);
void tegra_bo_free_object(struct drm_gem_object *gem);
int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
struct drm_mode_create_dumb *args);
extern const struct vm_operations_struct tegra_bo_vm_ops;
int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma);
int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma);
struct dma_buf *tegra_gem_prime_export(struct drm_gem_object *gem,
int flags);
struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm,
struct dma_buf *buf);
struct host1x_bo *tegra_gem_lookup(struct drm_file *file, u32 handle);
#endif
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