drivers/gpu/drm/mediatek/mtk_drm_gem.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  */
   5
   6 #ifndef _MTK_DRM_GEM_H_
   7 #define _MTK_DRM_GEM_H_
   8
   9 #include <drm/drm_gem.h>
  10
  11 /*
  12  * mtk drm buffer structure.
  13  *
  14  * @base: a gem object.
  15  *      - a new handle to this gem object would be created
  16  *      by drm_gem_handle_create().
  17  * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
  18  * @kvaddr: kernel virtual address of gem buffer.
  19  * @dma_addr: dma address of gem buffer.
  20  * @dma_attrs: dma attributes of gem buffer.
  21  *
  22  * P.S. this object would be transferred to user as kms_bo.handle so
  23  *      user can access the buffer through kms_bo.handle.
  24  */
  25 struct mtk_drm_gem_obj {
  26         struct drm_gem_object   base;
  27         void                    *cookie;
  28         void                    *kvaddr;
  29         dma_addr_t              dma_addr;
  30         unsigned long           dma_attrs;
  31         struct sg_table         *sg;
  32         struct page             **pages;
  33 };
  34
  35 #define to_mtk_gem_obj(x)       container_of(x, struct mtk_drm_gem_obj, base)
  36
  37 void mtk_drm_gem_free_object(struct drm_gem_object *gem);
  38 struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
  39                                            bool alloc_kmap);
  40 int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
  41                             struct drm_mode_create_dumb *args);
  42 int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
  43 int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
  44                          struct vm_area_struct *vma);
  45 struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
  46 struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
  47                         struct dma_buf_attachment *attach, struct sg_table *sg);
  48 void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj);
  49 void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
  50
  51 #endif