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_to_gem - Convert a struct ttm_buffer_object to an embedding 32 * struct drm_i915_gem_object. 33 * 34 * Return: Pointer to the embedding struct ttm_buffer_object, or NULL 35 * if the object was not an i915 ttm object. 36 */ 37 static inline struct drm_i915_gem_object * 38 i915_ttm_to_gem(struct ttm_buffer_object *bo) 39 { 40 if (bo->destroy != i915_ttm_bo_destroy) 41 return NULL; 42 43 return container_of(bo, struct drm_i915_gem_object, __do_not_access); 44 } 45 46 int __i915_gem_ttm_object_init(struct intel_memory_region *mem, 47 struct drm_i915_gem_object *obj, 48 resource_size_t offset, 49 resource_size_t size, 50 resource_size_t page_size, 51 unsigned int flags); 52 53 /* Internal I915 TTM declarations and definitions below. */ 54 55 #define I915_PL_LMEM0 TTM_PL_PRIV 56 #define I915_PL_SYSTEM TTM_PL_SYSTEM 57 #define I915_PL_STOLEN TTM_PL_VRAM 58 #define I915_PL_GGTT TTM_PL_TT 59 60 struct ttm_placement *i915_ttm_sys_placement(void); 61 62 void i915_ttm_free_cached_io_rsgt(struct drm_i915_gem_object *obj); 63 64 struct i915_refct_sgt * 65 i915_ttm_resource_get_st(struct drm_i915_gem_object *obj, 66 struct ttm_resource *res); 67 68 void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj); 69 70 int i915_ttm_purge(struct drm_i915_gem_object *obj); 71 72 /** 73 * i915_ttm_gtt_binds_lmem - Should the memory be viewed as LMEM by the GTT? 74 * @mem: struct ttm_resource representing the memory. 75 * 76 * Return: true if memory should be viewed as LMEM for GTT binding purposes, 77 * false otherwise. 78 */ 79 static inline bool i915_ttm_gtt_binds_lmem(struct ttm_resource *mem) 80 { 81 return mem->mem_type != I915_PL_SYSTEM; 82 } 83 84 /** 85 * i915_ttm_cpu_maps_iomem - Should the memory be viewed as IOMEM by the CPU? 86 * @mem: struct ttm_resource representing the memory. 87 * 88 * Return: true if memory should be viewed as IOMEM for CPU mapping purposes. 89 */ 90 static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem) 91 { 92 /* Once / if we support GGTT, this is also false for cached ttm_tts */ 93 return mem->mem_type != I915_PL_SYSTEM; 94 } 95 96 bool i915_ttm_resource_mappable(struct ttm_resource *res); 97 98 #endif 99