include/drm/drm_gem_cma_helper.h

   1 #ifndef __DRM_GEM_CMA_HELPER_H__
   2 #define __DRM_GEM_CMA_HELPER_H__
   3
   4 struct drm_gem_cma_object {
   5         struct drm_gem_object base;
   6         dma_addr_t paddr;
   7         void *vaddr;
   8 };
   9
  10 static inline struct drm_gem_cma_object *
  11 to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
  12 {
  13         return container_of(gem_obj, struct drm_gem_cma_object, base);
  14 }
  15
  16 /* free gem object. */
  17 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  18
  19 /* create memory region for drm framebuffer. */
  20 int drm_gem_cma_dumb_create(struct drm_file *file_priv,
  21                 struct drm_device *drm, struct drm_mode_create_dumb *args);
  22
  23 /* map memory region for drm framebuffer to user space. */
  24 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
  25                 struct drm_device *drm, uint32_t handle, uint64_t *offset);
  26
  27 /* set vm_flags and we can change the vm attribute to other one at here. */
  28 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
  29
  30 /*
  31  * destroy memory region allocated.
  32  *      - a gem handle and physical memory region pointed by a gem object
  33  *      would be released by drm_gem_handle_delete().
  34  */
  35 int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
  36                 struct drm_device *drm, unsigned int handle);
  37
  38 /* allocate physical memory. */
  39 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  40                 unsigned int size);
  41
  42 extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  43
  44 #endif /* __DRM_GEM_CMA_HELPER_H__ */