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 */ 19 static inline struct ttm_buffer_object * 20 i915_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 */ 28 void 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 */ 37 static 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 * 46 * Return: Pointer to the embedding struct ttm_buffer_object. 47 */ 48 static inline struct drm_i915_gem_object * 49 i915_ttm_to_gem(struct ttm_buffer_object *bo) 50 { 51 return container_of(bo, struct drm_i915_gem_object, __do_not_access); 52 } 53 54 int __i915_gem_ttm_object_init(struct intel_memory_region *mem, 55 struct drm_i915_gem_object *obj, 56 resource_size_t offset, 57 resource_size_t size, 58 resource_size_t page_size, 59 unsigned int flags); 60 61 /* Internal I915 TTM declarations and definitions below. */ 62 63 #define I915_PL_LMEM0 TTM_PL_PRIV 64 #define I915_PL_SYSTEM TTM_PL_SYSTEM 65 #define I915_PL_STOLEN TTM_PL_VRAM 66 #define I915_PL_GGTT TTM_PL_TT 67 68 struct ttm_placement *i915_ttm_sys_placement(void); 69 70 void i915_ttm_free_cached_io_rsgt(struct drm_i915_gem_object *obj); 71 72 struct i915_refct_sgt * 73 i915_ttm_resource_get_st(struct drm_i915_gem_object *obj, 74 struct ttm_resource *res); 75 76 void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj); 77 78 int i915_ttm_purge(struct drm_i915_gem_object *obj); 79 80 /** 81 * i915_ttm_gtt_binds_lmem - Should the memory be viewed as LMEM by the GTT? 82 * @mem: struct ttm_resource representing the memory. 83 * 84 * Return: true if memory should be viewed as LMEM for GTT binding purposes, 85 * false otherwise. 86 */ 87 static inline bool i915_ttm_gtt_binds_lmem(struct ttm_resource *mem) 88 { 89 return mem->mem_type != I915_PL_SYSTEM; 90 } 91 92 /** 93 * i915_ttm_cpu_maps_iomem - Should the memory be viewed as IOMEM by the CPU? 94 * @mem: struct ttm_resource representing the memory. 95 * 96 * Return: true if memory should be viewed as IOMEM for CPU mapping purposes. 97 */ 98 static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem) 99 { 100 /* Once / if we support GGTT, this is also false for cached ttm_tts */ 101 return mem && mem->mem_type != I915_PL_SYSTEM; 102 } 103 104 bool i915_ttm_resource_mappable(struct ttm_resource *res); 105 106 #endif 107