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  */
33 struct 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 
44 void mtk_drm_gem_free_object(struct drm_gem_object *gem);
45 struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
46 					   bool alloc_kmap);
47 int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
48 			    struct drm_mode_create_dumb *args);
49 int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
50 int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
51 			 struct vm_area_struct *vma);
52 struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
53 struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
54 			struct dma_buf_attachment *attach, struct sg_table *sg);
55 
56 #endif
57