124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* exynos_drm_gem.h
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authoer: Inki Dae <inki.dae@samsung.com>
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*/
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#ifndef _EXYNOS_DRM_GEM_H_
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#define _EXYNOS_DRM_GEM_H_
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#include <drm/drm_gem.h>
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#include <linux/mm_types.h>
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#define to_exynos_gem(x) container_of(x, struct exynos_drm_gem, base)
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#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)
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/*
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* exynos drm buffer structure.
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*
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* @base: a gem object.
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* - a new handle to this gem object would be created
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* by drm_gem_handle_create().
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* @buffer: a pointer to exynos_drm_gem_buffer object.
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* - contain the information to memory region allocated
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* by user request or at framebuffer creation.
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* continuous memory region allocated by user request
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* or at framebuffer creation.
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* @flags: indicate memory type to allocated buffer and cache attruibute.
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* @size: size requested from user, in bytes and this size is aligned
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* in page unit.
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* @cookie: cookie returned by dma_alloc_attrs
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* @kvaddr: kernel virtual address to allocated memory region.
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* @dma_addr: bus address(accessed by dma) to allocated memory region.
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* - this address could be physical address without IOMMU and
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* device address with IOMMU.
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* @pages: Array of backing pages.
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* @sgt: Imported sg_table.
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*
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* P.S. this object would be transferred to user as kms_bo.handle so
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* user can access the buffer through kms_bo.handle.
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*/
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struct exynos_drm_gem {
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struct drm_gem_object base;
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unsigned int flags;
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unsigned long size;
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void *cookie;
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void __iomem *kvaddr;
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dma_addr_t dma_addr;
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unsigned long dma_attrs;
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struct page **pages;
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struct sg_table *sgt;
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};
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/* destroy a buffer with gem object */
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void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem);
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/* create a new buffer with gem object */
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struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,
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unsigned int flags,
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unsigned long size);
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/*
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* request gem object creation and buffer allocation as the size
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* that it is calculated with framebuffer information such as width,
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* height and bpp.
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*/
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int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/* get fake-offset of gem object that can be used with mmap. */
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int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/*
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* get exynos drm object from gem handle, this function could be used for
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* other drivers such as 2d/3d acceleration drivers.
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* with this function call, gem object reference count would be increased.
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*/
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struct exynos_drm_gem *exynos_drm_gem_get(struct drm_file *filp,
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unsigned int gem_handle);
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/*
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* put exynos drm object acquired from exynos_drm_gem_get(),
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* gem object reference count would be decreased.
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*/
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static inline void exynos_drm_gem_put(struct exynos_drm_gem *exynos_gem)
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{
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drm_gem_object_put_unlocked(&exynos_gem->base);
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}
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/* get buffer information to memory region allocated by gem. */
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int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/* free gem object. */
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void exynos_drm_gem_free_object(struct drm_gem_object *obj);
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/* create memory region for drm framebuffer. */
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int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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/* page fault handler and mmap fault address(virtual) to physical memory. */
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vm_fault_t exynos_drm_gem_fault(struct vm_fault *vmf);
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/* set vm_flags and we can change the vm attribute to other one at here. */
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int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
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/* low-level interface prime helpers */
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struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,
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struct dma_buf *dma_buf);
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struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj);
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struct drm_gem_object *
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exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj);
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void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
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int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj,
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struct vm_area_struct *vma);
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#endif
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