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         struct sg_table *sgt;
   8
   9         /* For objects with DMA memory allocated by GEM CMA */
  10         void *vaddr;
  11 };
  12
  13 static inline struct drm_gem_cma_object *
  14 to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
  15 {
  16         return container_of(gem_obj, struct drm_gem_cma_object, base);
  17 }
  18
  19 /* free gem object. */
  20 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  21
  22 /* create memory region for drm framebuffer. */
  23 int drm_gem_cma_dumb_create(struct drm_file *file_priv,
  24                 struct drm_device *drm, struct drm_mode_create_dumb *args);
  25
  26 /* map memory region for drm framebuffer to user space. */
  27 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
  28                 struct drm_device *drm, uint32_t handle, uint64_t *offset);
  29
  30 /* set vm_flags and we can change the vm attribute to other one at here. */
  31 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
  32
  33 /*
  34  * destroy memory region allocated.
  35  *      - a gem handle and physical memory region pointed by a gem object
  36  *      would be released by drm_gem_handle_delete().
  37  */
  38 int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
  39                 struct drm_device *drm, unsigned int handle);
  40
  41 /* allocate physical memory. */
  42 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  43                 unsigned int size);
  44
  45 extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  46
  47 #ifdef CONFIG_DEBUG_FS
  48 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
  49 #endif
  50
  51 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
  52 struct drm_gem_object *
  53 drm_gem_cma_prime_import_sg_table(struct drm_device *dev, size_t size,
  54                                   struct sg_table *sgt);
  55 int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
  56                            struct vm_area_struct *vma);
  57 void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
  58 void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
  59
  60 #endif /* __DRM_GEM_CMA_HELPER_H__ */