drivers/gpu/drm/i915/i915_ttm_buddy_manager.h

   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