1/*
2 * Copyright 2017 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 * Authors: Christian König
23 */
24#ifndef __AMDGPU_MN_H__
25#define __AMDGPU_MN_H__
26
27#include <linux/types.h>
28#include <linux/hmm.h>
29#include <linux/rwsem.h>
30#include <linux/workqueue.h>
31#include <linux/interval_tree.h>
32#include <linux/mmu_notifier.h>
33
34struct amdgpu_hmm_range {
35 struct hmm_range hmm_range;
36 struct amdgpu_bo *bo;
37};
38
39int amdgpu_hmm_range_get_pages(struct mmu_interval_notifier *notifier,
40 uint64_t start, uint64_t npages, bool readonly,
41 void *owner,
42 struct amdgpu_hmm_range *range);
43
44#if defined(CONFIG_HMM_MIRROR)
45bool amdgpu_hmm_range_valid(struct amdgpu_hmm_range *range);
46struct amdgpu_hmm_range *amdgpu_hmm_range_alloc(struct amdgpu_bo *bo);
47void amdgpu_hmm_range_free(struct amdgpu_hmm_range *range);
48int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr);
49void amdgpu_hmm_unregister(struct amdgpu_bo *bo);
50#else
51static inline int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr)
52{
53 DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, "
54 "add CONFIG_ZONE_DEVICE=y in config file to fix this\n");
55 return -ENODEV;
56}
57
58static inline void amdgpu_hmm_unregister(struct amdgpu_bo *bo) {}
59
60static inline bool amdgpu_hmm_range_valid(struct amdgpu_hmm_range *range)
61{
62 return false;
63}
64
65static inline struct amdgpu_hmm_range *amdgpu_hmm_range_alloc(struct amdgpu_bo *bo)
66{
67 return NULL;
68}
69
70static inline void amdgpu_hmm_range_free(struct amdgpu_hmm_range *range) {}
71#endif
72
73#endif
74

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