drm/prime: Shuffle functions.

Reorder all the functions in drm_prime.[hc] into three groups: core,
export helpers, import helpers.

Not other changes beyond moving the functions and their unchanged
kerneldoc around in here.

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Eric Anholt <eric@anholt.net>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190618092038.17929-1-daniel.vetter@ffwll.ch

include/drm/drm_prime.h

@@ -42,7 +42,6 @@
  * This just contains the internal &struct dma_buf and handle caches for each
  * &struct drm_file used by the PRIME core code.
  */
-
 struct drm_prime_file_private {
 /* private: */
 	struct mutex lock;
@@ -64,25 +63,18 @@ struct drm_file;
 
 struct device;
 
-struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
-				     struct drm_gem_object *obj,
-				     int flags);
+/* core prime functions */
+struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
+				      struct dma_buf_export_info *exp_info);
+void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
+
+int drm_gem_prime_fd_to_handle(struct drm_device *dev,
+			       struct drm_file *file_priv, int prime_fd, uint32_t *handle);
 int drm_gem_prime_handle_to_fd(struct drm_device *dev,
 			       struct drm_file *file_priv, uint32_t handle, uint32_t flags,
 			       int *prime_fd);
-int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
-struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
-					    struct dma_buf *dma_buf);
-
-struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
-						struct dma_buf *dma_buf,
-						struct device *attach_dev);
 
-int drm_gem_prime_fd_to_handle(struct drm_device *dev,
-			       struct drm_file *file_priv, int prime_fd, uint32_t *handle);
-struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
-				      struct dma_buf_export_info *exp_info);
-void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
+/* helper functions for exporting */
 int drm_gem_map_attach(struct dma_buf *dma_buf,
 		       struct dma_buf_attachment *attach);
 void drm_gem_map_detach(struct dma_buf *dma_buf,
@@ -94,12 +86,26 @@ void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
 			   enum dma_data_direction dir);
 void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
 void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
+
+int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
 int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
 
-int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
-				     dma_addr_t *addrs, int max_pages);
 struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
+struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
+				     struct drm_gem_object *obj,
+				     int flags);
+
+/* helper functions for importing */
+struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
+						struct dma_buf *dma_buf,
+						struct device *attach_dev);
+struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
+					    struct dma_buf *dma_buf);
+
 void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
 
+int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
+				     dma_addr_t *addrs, int max_pages);
+
 
 #endif /* __DRM_PRIME_H__ */