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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2021 Intel Corporation
*/
#ifndef _I915_GEM_TTM_H_
#define _I915_GEM_TTM_H_
#include <drm/ttm/ttm_placement.h>
#include "gem/i915_gem_object_types.h"
/**
* i915_gem_to_ttm - Convert a struct drm_i915_gem_object to a
* struct ttm_buffer_object.
* @obj: Pointer to the gem object.
*
* Return: Pointer to the embedded struct ttm_buffer_object.
*/
static inline struct ttm_buffer_object *
i915_gem_to_ttm(struct drm_i915_gem_object *obj)
{
return &obj->__do_not_access;
}
/*
* i915 ttm gem object destructor. Internal use only.
*/
void i915_ttm_bo_destroy(struct ttm_buffer_object *bo);
/**
* i915_ttm_is_ghost_object - Check if the ttm bo is a ghost object.
* @bo: Pointer to the ttm buffer object
*
* Return: True if the ttm bo is not a i915 object but a ghost ttm object,
* False otherwise.
*/
static inline bool i915_ttm_is_ghost_object(struct ttm_buffer_object *bo)
{
return bo->destroy != i915_ttm_bo_destroy;
}
/**
* i915_ttm_to_gem - Convert a struct ttm_buffer_object to an embedding
* struct drm_i915_gem_object.
*
* Return: Pointer to the embedding struct ttm_buffer_object.
*/
static inline struct drm_i915_gem_object *
i915_ttm_to_gem(struct ttm_buffer_object *bo)
{
return container_of(bo, struct drm_i915_gem_object, __do_not_access);
}
int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
struct drm_i915_gem_object *obj,
resource_size_t offset,
resource_size_t size,
resource_size_t page_size,
unsigned int flags);
/* Internal I915 TTM declarations and definitions below. */
#define I915_PL_LMEM0 TTM_PL_PRIV
#define I915_PL_SYSTEM TTM_PL_SYSTEM
#define I915_PL_STOLEN TTM_PL_VRAM
#define I915_PL_GGTT TTM_PL_TT
struct ttm_placement *i915_ttm_sys_placement(void);
void i915_ttm_free_cached_io_rsgt(struct drm_i915_gem_object *obj);
struct i915_refct_sgt *
i915_ttm_resource_get_st(struct drm_i915_gem_object *obj,
struct ttm_resource *res);
void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj);
int i915_ttm_purge(struct drm_i915_gem_object *obj);
/**
* i915_ttm_gtt_binds_lmem - Should the memory be viewed as LMEM by the GTT?
* @mem: struct ttm_resource representing the memory.
*
* Return: true if memory should be viewed as LMEM for GTT binding purposes,
* false otherwise.
*/
static inline bool i915_ttm_gtt_binds_lmem(struct ttm_resource *mem)
{
return mem->mem_type != I915_PL_SYSTEM;
}
/**
* i915_ttm_cpu_maps_iomem - Should the memory be viewed as IOMEM by the CPU?
* @mem: struct ttm_resource representing the memory.
*
* Return: true if memory should be viewed as IOMEM for CPU mapping purposes.
*/
static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem)
{
/* Once / if we support GGTT, this is also false for cached ttm_tts */
return mem && mem->mem_type != I915_PL_SYSTEM;
}
bool i915_ttm_resource_mappable(struct ttm_resource *res);
#endif
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