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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef DRM_GEM_VRAM_HELPER_H
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#define DRM_GEM_VRAM_HELPER_H
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#include <drm/drm_gem.h>
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#include <drm/ttm/ttm_bo_api.h>
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#include <drm/ttm/ttm_placement.h>
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#include <linux/kernel.h> /* for container_of() */
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struct filp;
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#define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM
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#define DRM_GEM_VRAM_PL_FLAG_SYSTEM TTM_PL_FLAG_SYSTEM
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/*
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* Buffer-object helpers
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*/
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/**
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* struct drm_gem_vram_object - GEM object backed by VRAM
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* @gem: GEM object
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* @bo: TTM buffer object
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* @kmap: Mapping information for @bo
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* @placement: TTM placement information. Supported placements are \
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%TTM_PL_VRAM and %TTM_PL_SYSTEM
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* @placements: TTM placement information.
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* @pin_count: Pin counter
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*
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* The type struct drm_gem_vram_object represents a GEM object that is
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* backed by VRAM. It can be used for simple framebuffer devices with
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* dedicated memory. The buffer object can be evicted to system memory if
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* video memory becomes scarce.
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*/
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struct drm_gem_vram_object {
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struct drm_gem_object gem;
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struct ttm_buffer_object bo;
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struct ttm_bo_kmap_obj kmap;
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/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
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struct ttm_placement placement;
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struct ttm_place placements[2];
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int pin_count;
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};
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/**
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* Returns the container of type &struct drm_gem_vram_object
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* for field bo.
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* @bo: the VRAM buffer object
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* Returns: The containing GEM VRAM object
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*/
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static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
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struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct drm_gem_vram_object, bo);
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}
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/**
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* Returns the container of type &struct drm_gem_vram_object
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* for field gem.
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* @gem: the GEM object
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* Returns: The containing GEM VRAM object
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*/
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static inline struct drm_gem_vram_object *drm_gem_vram_of_gem(
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struct drm_gem_object *gem)
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{
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return container_of(gem, struct drm_gem_vram_object, gem);
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}
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struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
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struct ttm_bo_device *bdev,
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size_t size,
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unsigned long pg_align,
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bool interruptible);
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void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
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int drm_gem_vram_reserve(struct drm_gem_vram_object *gbo, bool no_wait);
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void drm_gem_vram_unreserve(struct drm_gem_vram_object *gbo);
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u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo);
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s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
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int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag);
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int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo);
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int drm_gem_vram_push_to_system(struct drm_gem_vram_object *gbo);
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void *drm_gem_vram_kmap_at(struct drm_gem_vram_object *gbo, bool map,
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bool *is_iomem, struct ttm_bo_kmap_obj *kmap);
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void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map,
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bool *is_iomem);
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void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo,
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struct ttm_bo_kmap_obj *kmap);
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void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);
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#endif
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