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        struct sg_table *sgt;
   8
   9        /* For objects with DMA memory allocated by GEM CMA */
  10        void *vaddr;
  11};
  12
  13static inline struct drm_gem_cma_object *
  14to_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. */
  20void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  21
  22/* create memory region for drm framebuffer. */
  23int 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. */
  27int 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. */
  31int 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 */
  38int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
  39                struct drm_device *drm, unsigned int handle);
  40
  41/* allocate physical memory. */
  42struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  43                unsigned int size);
  44
  45extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  46
  47#ifdef CONFIG_DEBUG_FS
  48void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
  49#endif
  50
  51struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
  52struct drm_gem_object *
  53drm_gem_cma_prime_import_sg_table(struct drm_device *dev, size_t size,
  54                                  struct sg_table *sgt);
  55int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
  56                           struct vm_area_struct *vma);
  57void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
  58void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
  59
  60#endif /* __DRM_GEM_CMA_HELPER_H__ */
  61