1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 */
5
6#ifndef _MTK_DRM_GEM_H_
7#define _MTK_DRM_GEM_H_
8
9#include <drm/drm_gem.h>
10
11/*
12 * mtk drm buffer structure.
13 *
14 * @base: a gem object.
15 *	- a new handle to this gem object would be created
16 *	by drm_gem_handle_create().
17 * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
18 * @kvaddr: kernel virtual address of gem buffer.
19 * @dma_addr: dma address of gem buffer.
20 * @dma_attrs: dma attributes of gem buffer.
21 *
22 * P.S. this object would be transferred to user as kms_bo.handle so
23 *	user can access the buffer through kms_bo.handle.
24 */
25struct mtk_drm_gem_obj {
26	struct drm_gem_object	base;
27	void			*cookie;
28	void			*kvaddr;
29	dma_addr_t		dma_addr;
30	unsigned long		dma_attrs;
31	struct sg_table		*sg;
32	struct page		**pages;
33};
34
35#define to_mtk_gem_obj(x)	container_of(x, struct mtk_drm_gem_obj, base)
36
37void mtk_drm_gem_free_object(struct drm_gem_object *gem);
38struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
39					   bool alloc_kmap);
40int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
41			    struct drm_mode_create_dumb *args);
42struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
43struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
44			struct dma_buf_attachment *attach, struct sg_table *sg);
45int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
46void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj,
47			      struct iosys_map *map);
48
49#endif
50