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Linux kernel mirror (for testing)
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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
29struct 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
40struct amdgpu_vram_mgr_resource {
41 struct ttm_resource base;
42 struct list_head blocks;
43 unsigned long flags;
44};
45
46static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block)
47{
48 return drm_buddy_block_offset(block);
49}
50
51static 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
56static inline bool amdgpu_vram_mgr_is_cleared(struct drm_buddy_block *block)
57{
58 return drm_buddy_block_is_clear(block);
59}
60
61static inline struct amdgpu_vram_mgr_resource *
62to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
63{
64 return container_of(res, struct amdgpu_vram_mgr_resource, base);
65}
66
67static inline void amdgpu_vram_mgr_set_cleared(struct ttm_resource *res)
68{
69 to_amdgpu_vram_mgr_resource(res)->flags |= DRM_BUDDY_CLEARED;
70}
71
72#endif