linux/drivers/gpu/drm/drm_gem_ttm_helper.c

// SPDX-License-Identifier: GPL-2.0-or-later

#include <linux/module.h>

#include <drm/drm_gem_ttm_helper.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_tt.h>

/**
 * DOC: overview
 *
 * This library provides helper functions for gem objects backed by
 * ttm.
 */

/**
 * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
 * @p: DRM printer
 * @indent: Tab indentation level
 * @gem: GEM object
 *
 * This function can be used as &drm_gem_object_funcs.print_info
 * callback.
 */
void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
			    const struct drm_gem_object *gem)
{ … }
EXPORT_SYMBOL(…);

/**
 * drm_gem_ttm_vmap() - vmap &ttm_buffer_object
 * @gem: GEM object.
 * @map: [out] returns the dma-buf mapping.
 *
 * Maps a GEM object with ttm_bo_vmap(). This function can be used as
 * &drm_gem_object_funcs.vmap callback.
 *
 * Returns:
 * 0 on success, or a negative errno code otherwise.
 */
int drm_gem_ttm_vmap(struct drm_gem_object *gem,
		     struct iosys_map *map)
{ … }
EXPORT_SYMBOL(…);

/**
 * drm_gem_ttm_vunmap() - vunmap &ttm_buffer_object
 * @gem: GEM object.
 * @map: dma-buf mapping.
 *
 * Unmaps a GEM object with ttm_bo_vunmap(). This function can be used as
 * &drm_gem_object_funcs.vmap callback.
 */
void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
			struct iosys_map *map)
{ … }
EXPORT_SYMBOL(…);

/**
 * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
 * @gem: GEM object.
 * @vma: vm area.
 *
 * This function can be used as &drm_gem_object_funcs.mmap
 * callback.
 */
int drm_gem_ttm_mmap(struct drm_gem_object *gem,
		     struct vm_area_struct *vma)
{ … }
EXPORT_SYMBOL(…);

/**
 * drm_gem_ttm_dumb_map_offset() - Implements struct &drm_driver.dumb_map_offset
 * @file:	DRM file pointer.
 * @dev:	DRM device.
 * @handle:	GEM handle
 * @offset:	Returns the mapping's memory offset on success
 *
 * Provides an implementation of struct &drm_driver.dumb_map_offset for
 * TTM-based GEM drivers. TTM allocates the offset internally and
 * drm_gem_ttm_dumb_map_offset() returns it for dumb-buffer implementations.
 *
 * See struct &drm_driver.dumb_map_offset.
 *
 * Returns:
 * 0 on success, or a negative errno code otherwise.
 */
int drm_gem_ttm_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
				uint32_t handle, uint64_t *offset)
{ … }
EXPORT_SYMBOL(…);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;