drm/mediatek/mtk_drm_gem.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * Copyright (c) 2015 MediaTek Inc.
0004  */
0005
0006 #ifndef _MTK_DRM_GEM_H_
0007 #define _MTK_DRM_GEM_H_
0008
0009 #include <drm/drm_gem.h>
0010
0011 /*
0012  * mtk drm buffer structure.
0013  *
0014  * @base: a gem object.
0015  *  - a new handle to this gem object would be created
0016  *  by drm_gem_handle_create().
0017  * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
0018  * @kvaddr: kernel virtual address of gem buffer.
0019  * @dma_addr: dma address of gem buffer.
0020  * @dma_attrs: dma attributes of gem buffer.
0021  *
0022  * P.S. this object would be transferred to user as kms_bo.handle so
0023  *  user can access the buffer through kms_bo.handle.
0024  */
0025 struct mtk_drm_gem_obj {
0026     struct drm_gem_object   base;
0027     void            *cookie;
0028     void            *kvaddr;
0029     dma_addr_t      dma_addr;
0030     unsigned long       dma_attrs;
0031     struct sg_table     *sg;
0032     struct page     **pages;
0033 };
0034
0035 #define to_mtk_gem_obj(x)   container_of(x, struct mtk_drm_gem_obj, base)
0036
0037 void mtk_drm_gem_free_object(struct drm_gem_object *gem);
0038 struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
0039                        bool alloc_kmap);
0040 int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
0041                 struct drm_mode_create_dumb *args);
0042 struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
0043 struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
0044             struct dma_buf_attachment *attach, struct sg_table *sg);
0045 int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
0046 void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj,
0047                   struct iosys_map *map);
0048
0049 #endif