2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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