include/drm/drm_gem_cma_helper.h

   1 #ifndef __DRM_GEM_CMA_HELPER_H__
   2 #define __DRM_GEM_CMA_HELPER_H__
   3
   4 #include <drm/drmP.h>
   5 #include <drm/drm_gem.h>
   6
   7 struct drm_gem_cma_object {
   8         struct drm_gem_object base;
   9         dma_addr_t paddr;
  10         struct sg_table *sgt;
  11
  12         /* For objects with DMA memory allocated by GEM CMA */
  13         void *vaddr;
  14 };
  15
  16 static inline struct drm_gem_cma_object *
  17 to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
  18 {
  19         return container_of(gem_obj, struct drm_gem_cma_object, base);
  20 }
  21
  22 /* free gem object. */
  23 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  24
  25 /* create memory region for drm framebuffer. */
  26 int drm_gem_cma_dumb_create(struct drm_file *file_priv,
  27                 struct drm_device *drm, struct drm_mode_create_dumb *args);
  28
  29 /* map memory region for drm framebuffer to user space. */
  30 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
  31                 struct drm_device *drm, uint32_t handle, uint64_t *offset);
  32
  33 /* set vm_flags and we can change the vm attribute to other one at here. */
  34 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
  35
  36 /* allocate physical memory. */
  37 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  38                 unsigned int size);
  39
  40 extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  41
  42 #ifdef CONFIG_DEBUG_FS
  43 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
  44 #endif
  45
  46 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
  47 struct drm_gem_object *
  48 drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
  49                                   struct dma_buf_attachment *attach,
  50                                   struct sg_table *sgt);
  51 int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
  52                            struct vm_area_struct *vma);
  53 void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
  54 void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
  55
  56 #endif /* __DRM_GEM_CMA_HELPER_H__ */