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 struct list_head allocated_vres_list;
39};
40
41struct amdgpu_vres_task {
42 pid_t pid;
43 char comm[TASK_COMM_LEN];
44};
45
46struct amdgpu_vram_block_info {
47 u64 start;
48 u64 size;
49 struct amdgpu_vres_task task;
50};
51
52struct amdgpu_vram_mgr_resource {
53 struct ttm_resource base;
54 struct list_head blocks;
55 unsigned long flags;
56 struct list_head vres_node;
57 struct amdgpu_vres_task task;
58};
59
60static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block)
61{
62 return drm_buddy_block_offset(block);
63}
64
65static inline u64 amdgpu_vram_mgr_block_size(struct drm_buddy_block *block)
66{
67 return (u64)PAGE_SIZE << drm_buddy_block_order(block);
68}
69
70static inline bool amdgpu_vram_mgr_is_cleared(struct drm_buddy_block *block)
71{
72 return drm_buddy_block_is_clear(block);
73}
74
75static inline struct amdgpu_vram_mgr_resource *
76to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
77{
78 return container_of(res, struct amdgpu_vram_mgr_resource, base);
79}
80
81static inline void amdgpu_vram_mgr_set_cleared(struct ttm_resource *res)
82{
83 struct amdgpu_vram_mgr_resource *ares = to_amdgpu_vram_mgr_resource(res);
84
85 WARN_ON(ares->flags & DRM_BUDDY_CLEARED);
86 ares->flags |= DRM_BUDDY_CLEARED;
87}
88
89int amdgpu_vram_mgr_query_address_block_info(struct amdgpu_vram_mgr *mgr,
90 uint64_t address, struct amdgpu_vram_block_info *info);
91
92#endif
93

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h