1/* SPDX-License-Identifier: MIT */ 2/* 3 * Copyright �� 2021 Intel Corporation 4 */ 5#ifndef _I915_GEM_TTM_H_ 6#define _I915_GEM_TTM_H_ 7 8#include <drm/ttm/ttm_placement.h> 9 10#include "gem/i915_gem_object_types.h" 11 12/** 13 * i915_gem_to_ttm - Convert a struct drm_i915_gem_object to a 14 * struct ttm_buffer_object. 15 * @obj: Pointer to the gem object. 16 * 17 * Return: Pointer to the embedded struct ttm_buffer_object. 18 */ 19static inline struct ttm_buffer_object * 20i915_gem_to_ttm(struct drm_i915_gem_object *obj) 21{ 22 return &obj->__do_not_access; 23} 24 25/* 26 * i915 ttm gem object destructor. Internal use only. 27 */ 28void i915_ttm_bo_destroy(struct ttm_buffer_object *bo); 29 30/** 31 * i915_ttm_is_ghost_object - Check if the ttm bo is a ghost object. 32 * @bo: Pointer to the ttm buffer object 33 * 34 * Return: True if the ttm bo is not a i915 object but a ghost ttm object, 35 * False otherwise. 36 */ 37static inline bool i915_ttm_is_ghost_object(struct ttm_buffer_object *bo) 38{ 39 return bo->destroy != i915_ttm_bo_destroy; 40} 41 42/** 43 * i915_ttm_to_gem - Convert a struct ttm_buffer_object to an embedding 44 * struct drm_i915_gem_object. 45 * @bo: Pointer to the ttm buffer object 46 * 47 * Return: Pointer to the embedding struct drm_i915_gem_object. 48 */ 49static inline struct drm_i915_gem_object * 50i915_ttm_to_gem(struct ttm_buffer_object *bo) 51{ 52 return container_of(bo, struct drm_i915_gem_object, __do_not_access); 53} 54 55int __i915_gem_ttm_object_init(struct intel_memory_region *mem, 56 struct drm_i915_gem_object *obj, 57 resource_size_t offset, 58 resource_size_t size, 59 resource_size_t page_size, 60 unsigned int flags); 61 62/* Internal I915 TTM declarations and definitions below. */ 63 64#define I915_PL_LMEM0 TTM_PL_PRIV 65#define I915_PL_SYSTEM TTM_PL_SYSTEM 66#define I915_PL_STOLEN TTM_PL_VRAM 67#define I915_PL_GGTT TTM_PL_TT 68 69struct ttm_placement *i915_ttm_sys_placement(void); 70 71void i915_ttm_free_cached_io_rsgt(struct drm_i915_gem_object *obj); 72 73struct i915_refct_sgt * 74i915_ttm_resource_get_st(struct drm_i915_gem_object *obj, 75 struct ttm_resource *res); 76 77void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj); 78 79int i915_ttm_purge(struct drm_i915_gem_object *obj); 80 81/** 82 * i915_ttm_gtt_binds_lmem - Should the memory be viewed as LMEM by the GTT? 83 * @mem: struct ttm_resource representing the memory. 84 * 85 * Return: true if memory should be viewed as LMEM for GTT binding purposes, 86 * false otherwise. 87 */ 88static inline bool i915_ttm_gtt_binds_lmem(struct ttm_resource *mem) 89{ 90 return mem->mem_type != I915_PL_SYSTEM; 91} 92 93/** 94 * i915_ttm_cpu_maps_iomem - Should the memory be viewed as IOMEM by the CPU? 95 * @mem: struct ttm_resource representing the memory. 96 * 97 * Return: true if memory should be viewed as IOMEM for CPU mapping purposes. 98 */ 99static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem) 100{ 101 /* Once / if we support GGTT, this is also false for cached ttm_tts */ 102 return mem && mem->mem_type != I915_PL_SYSTEM; 103} 104 105bool i915_ttm_resource_mappable(struct ttm_resource *res); 106 107#endif 108