drivers/gpu/drm/mediatek/mtk_drm_gem.h

   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_dumb_map_offset(struct drm_file *file_priv,
  50                                 struct drm_device *dev, uint32_t handle,
  51                                 uint64_t *offset);
  52 int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
  53 int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
  54                          struct vm_area_struct *vma);
  55 struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
  56 struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
  57                         struct dma_buf_attachment *attach, struct sg_table *sg);
  58
  59 #endif