1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 6 #ifndef __I915_TTM_BUDDY_MANAGER_H__ 7 #define __I915_TTM_BUDDY_MANAGER_H__ 8 9 #include <linux/list.h> 10 #include <linux/types.h> 11 12 #include <drm/ttm/ttm_resource.h> 13 14 struct ttm_device; 15 struct ttm_resource_manager; 16 struct drm_buddy; 17 18 /** 19 * struct i915_ttm_buddy_resource 20 * 21 * @base: struct ttm_resource base class we extend 22 * @blocks: the list of struct i915_buddy_block for this resource/allocation 23 * @flags: DRM_BUDDY_*_ALLOCATION flags 24 * @used_visible_size: How much of this resource, if any, uses the CPU visible 25 * portion, in pages. 26 * @mm: the struct i915_buddy_mm for this resource 27 * 28 * Extends the struct ttm_resource to manage an address space allocation with 29 * one or more struct i915_buddy_block. 30 */ 31 struct i915_ttm_buddy_resource { 32 struct ttm_resource base; 33 struct list_head blocks; 34 unsigned long flags; 35 unsigned long used_visible_size; 36 struct drm_buddy *mm; 37 }; 38 39 /** 40 * to_ttm_buddy_resource 41 * 42 * @res: the resource to upcast 43 * 44 * Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource. 45 */ 46 static inline struct i915_ttm_buddy_resource * 47 to_ttm_buddy_resource(struct ttm_resource *res) 48 { 49 return container_of(res, struct i915_ttm_buddy_resource, base); 50 } 51 52 int i915_ttm_buddy_man_init(struct ttm_device *bdev, 53 unsigned type, bool use_tt, 54 u64 size, u64 visible_size, 55 u64 default_page_size, u64 chunk_size); 56 int i915_ttm_buddy_man_fini(struct ttm_device *bdev, 57 unsigned int type); 58 59 int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, 60 u64 start, u64 size); 61 62 u64 i915_ttm_buddy_man_visible_size(struct ttm_resource_manager *man); 63 64 void i915_ttm_buddy_man_avail(struct ttm_resource_manager *man, 65 u64 *avail, u64 *avail_visible); 66 67 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 68 void i915_ttm_buddy_man_force_visible_size(struct ttm_resource_manager *man, 69 u64 size); 70 #endif 71 72 #endif 73