1 /* SPDX-License-Identifier: MIT
2  * Copyright 2021 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 
24 #ifndef __AMDGPU_VRAM_MGR_H__
25 #define __AMDGPU_VRAM_MGR_H__
26 
27 #include <drm/drm_buddy.h>
28 
29 struct amdgpu_vram_mgr {
30 	struct ttm_resource_manager manager;
31 	struct drm_buddy mm;
32 	/* protects access to buffer objects */
33 	struct mutex lock;
34 	struct list_head reservations_pending;
35 	struct list_head reserved_pages;
36 	atomic64_t vis_usage;
37 	u64 default_page_size;
38 };
39 
40 struct amdgpu_vram_mgr_resource {
41 	struct ttm_resource base;
42 	struct list_head blocks;
43 	unsigned long flags;
44 };
45 
46 static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block)
47 {
48 	return drm_buddy_block_offset(block);
49 }
50 
51 static inline u64 amdgpu_vram_mgr_block_size(struct drm_buddy_block *block)
52 {
53 	return (u64)PAGE_SIZE << drm_buddy_block_order(block);
54 }
55 
56 static inline struct amdgpu_vram_mgr_resource *
57 to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
58 {
59 	return container_of(res, struct amdgpu_vram_mgr_resource, base);
60 }
61 
62 #endif
63