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* Copyright (c) 2015 MediaTek Inc.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
#ifndef _MTK_DRM_GEM_H_
#define _MTK_DRM_GEM_H_
#include <drm/drm_gem.h>
* mtk drm buffer structure.
* @base: a gem object.
* - a new handle to this gem object would be created
* by drm_gem_handle_create().
* @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
* @kvaddr: kernel virtual address of gem buffer.
* @dma_addr: dma address of gem buffer.
* @dma_attrs: dma attributes of gem buffer.
* P.S. this object would be transferred to user as kms_bo.handle so
* user can access the buffer through kms_bo.handle.
struct mtk_drm_gem_obj {
struct drm_gem_object base;
void *cookie;
void *kvaddr;
dma_addr_t dma_addr;
unsigned long dma_attrs;
struct sg_table *sg;
#define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base)
void mtk_drm_gem_free_object(struct drm_gem_object *gem);
struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
bool alloc_kmap);
int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
struct drm_mode_create_dumb *args);
int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
struct vm_area_struct *vma);
struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sg);
* request gem object creation and buffer allocation as the size
* that it is calculated with framebuffer information such as width,
* height and bpp.
int mtk_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* get buffer offset to map to user space. */
int mtk_gem_map_offset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);