linux/include/drm/drm_gem_cma_helper.h
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   1#ifndef __DRM_GEM_CMA_HELPER_H__
   2#define __DRM_GEM_CMA_HELPER_H__
   3
   4struct drm_gem_cma_object {
   5        struct drm_gem_object base;
   6        dma_addr_t paddr;
   7        void *vaddr;
   8};
   9
  10static inline struct drm_gem_cma_object *
  11to_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. */
  17void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  18
  19/* create memory region for drm framebuffer. */
  20int 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. */
  24int 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. */
  28int 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 */
  35int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
  36                struct drm_device *drm, unsigned int handle);
  37
  38/* allocate physical memory. */
  39struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  40                unsigned int size);
  41
  42extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  43
  44#endif /* __DRM_GEM_CMA_HELPER_H__ */
  45
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