LXR linux/drivers/gpu/drm/mediatek/mtk_drm

   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_mmap(struct file *filp, struct vm_area_struct *vma);
  50int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
  51                         struct vm_area_struct *vma);
  52struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
  53struct 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