1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 #ifndef DRM_GEM_VRAM_HELPER_H
4 #define DRM_GEM_VRAM_HELPER_H
6 #include <drm/drm_gem.h>
7 #include <drm/ttm/ttm_bo_api.h>
8 #include <drm/ttm/ttm_placement.h>
9 #include <linux/kernel.h> /* for container_of() */
13 #define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM
14 #define DRM_GEM_VRAM_PL_FLAG_SYSTEM TTM_PL_FLAG_SYSTEM
17 * Buffer-object helpers
21 * struct drm_gem_vram_object - GEM object backed by VRAM
23 * @bo: TTM buffer object
24 * @kmap: Mapping information for @bo
25 * @placement: TTM placement information. Supported placements are \
26 %TTM_PL_VRAM and %TTM_PL_SYSTEM
27 * @placements: TTM placement information.
28 * @pin_count: Pin counter
30 * The type struct drm_gem_vram_object represents a GEM object that is
31 * backed by VRAM. It can be used for simple framebuffer devices with
32 * dedicated memory. The buffer object can be evicted to system memory if
33 * video memory becomes scarce.
35 struct drm_gem_vram_object {
36 struct drm_gem_object gem;
37 struct ttm_buffer_object bo;
38 struct ttm_bo_kmap_obj kmap;
40 /* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
41 struct ttm_placement placement;
42 struct ttm_place placements[2];
48 * Returns the container of type &struct drm_gem_vram_object
50 * @bo: the VRAM buffer object
51 * Returns: The containing GEM VRAM object
53 static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
54 struct ttm_buffer_object *bo)
56 return container_of(bo, struct drm_gem_vram_object, bo);
60 * Returns the container of type &struct drm_gem_vram_object
62 * @gem: the GEM object
63 * Returns: The containing GEM VRAM object
65 static inline struct drm_gem_vram_object *drm_gem_vram_of_gem(
66 struct drm_gem_object *gem)
68 return container_of(gem, struct drm_gem_vram_object, gem);
71 struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
72 struct ttm_bo_device *bdev,
74 unsigned long pg_align,
76 void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
77 int drm_gem_vram_reserve(struct drm_gem_vram_object *gbo, bool no_wait);
78 void drm_gem_vram_unreserve(struct drm_gem_vram_object *gbo);
79 u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo);
80 s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
81 int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag);
82 int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo);
83 int drm_gem_vram_push_to_system(struct drm_gem_vram_object *gbo);
84 void *drm_gem_vram_kmap_at(struct drm_gem_vram_object *gbo, bool map,
85 bool *is_iomem, struct ttm_bo_kmap_obj *kmap);
86 void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map,
88 void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo,
89 struct ttm_bo_kmap_obj *kmap);
90 void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);