include/drm/drm_gem_vram_helper.h

Source file repositories/reference/linux-study-clean/include/drm/drm_gem_vram_helper.h

File Facts

System
Linux kernel
Corpus path
include/drm/drm_gem_vram_helper.h
Extension
.h
Size
5736 bytes
Lines
203
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct drm_gem_vram_object {
	struct ttm_buffer_object bo;
	struct iosys_map map;

	/**
	 * @vmap_use_count:
	 *
	 * Reference count on the virtual address.
	 * The address are un-mapped when the count reaches zero.
	 */
	unsigned int vmap_use_count;

	/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
	struct ttm_placement placement;
	struct ttm_place placements[2];
};

/**
 * drm_gem_vram_of_bo - Returns the container of type
 * &struct drm_gem_vram_object for field bo.
 * @bo:		the VRAM buffer object
 * Returns:	The containing GEM VRAM object
 */
static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
	struct ttm_buffer_object *bo)
{
	return container_of(bo, struct drm_gem_vram_object, bo);
}

/**
 * drm_gem_vram_of_gem - Returns the container of type
 * &struct drm_gem_vram_object for field gem.
 * @gem:	the GEM object
 * Returns:	The containing GEM VRAM object
 */
static inline struct drm_gem_vram_object *drm_gem_vram_of_gem(
	struct drm_gem_object *gem)
{
	return container_of(gem, struct drm_gem_vram_object, bo.base);
}

struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
						size_t size,
						unsigned long pg_align);
void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct iosys_map *map);
void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo,
			 struct iosys_map *map);

int drm_gem_vram_fill_create_dumb(struct drm_file *file,
				  struct drm_device *dev,
				  unsigned long pg_align,
				  unsigned long pitch_align,
				  struct drm_mode_create_dumb *args);

/*
 * Helpers for struct drm_driver
 */

int drm_gem_vram_driver_dumb_create(struct drm_file *file,
				    struct drm_device *dev,
				    struct drm_mode_create_dumb *args);

/*
 * Helpers for struct drm_plane_helper_funcs
 */
int
drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane,
				     struct drm_plane_state *new_state);
void
drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane,
				     struct drm_plane_state *old_state);

/**
 * DRM_GEM_VRAM_PLANE_HELPER_FUNCS - Initializes struct drm_plane_helper_funcs
 *				     for VRAM handling
 *
 * Drivers may use GEM BOs as VRAM helpers for the framebuffer memory. This
 * macro initializes struct drm_plane_helper_funcs to use the respective helper
 * functions.
 */
#define DRM_GEM_VRAM_PLANE_HELPER_FUNCS \
	.prepare_fb = drm_gem_vram_plane_helper_prepare_fb, \
	.cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb

/**
 * define DRM_GEM_VRAM_DRIVER - default callback functions for
 *				&struct drm_driver
 *

Annotation

Implementation Notes