1/*
 2 * Copyright (c) 2015 MediaTek Inc.
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License version 2 as
 6 * published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope that it will be useful,
 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 */
13
14#ifndef _MTK_DRM_GEM_H_
15#define _MTK_DRM_GEM_H_
16
17#include <drm/drm_gem.h>
18
19/*
20 * mtk drm buffer structure.
21 *
22 * @base: a gem object.
23 *	- a new handle to this gem object would be created
24 *	by drm_gem_handle_create().
25 * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
26 * @kvaddr: kernel virtual address of gem buffer.
27 * @dma_addr: dma address of gem buffer.
28 * @dma_attrs: dma attributes of gem buffer.
29 *
30 * P.S. this object would be transferred to user as kms_bo.handle so
31 *	user can access the buffer through kms_bo.handle.
32 */
33struct mtk_drm_gem_obj {
34	struct drm_gem_object	base;
35	void			*cookie;
36	void			*kvaddr;
37	dma_addr_t		dma_addr;
38	unsigned long		dma_attrs;
39	struct sg_table		*sg;
40};
41
42#define to_mtk_gem_obj(x)	container_of(x, struct mtk_drm_gem_obj, base)
43
44void mtk_drm_gem_free_object(struct drm_gem_object *gem);
45struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
46					   bool alloc_kmap);
47int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
48			    struct drm_mode_create_dumb *args);
49int mtk_drm_gem_dumb_map_offset(struct drm_file *file_priv,
50				struct drm_device *dev, uint32_t handle,
51				uint64_t *offset);
52int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
53int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
54			 struct vm_area_struct *vma);
55struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
56struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
57			struct dma_buf_attachment *attach, struct sg_table *sg);
58
59#endif