1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /*
3  * Copyright 2020-2021 Advanced Micro Devices, Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  */
24 
25 #ifndef KFD_MIGRATE_H_
26 #define KFD_MIGRATE_H_
27 
28 #if IS_ENABLED(CONFIG_HSA_AMD_SVM)
29 
30 #include <linux/rwsem.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/sched/mm.h>
34 #include <linux/hmm.h>
35 #include "kfd_priv.h"
36 #include "kfd_svm.h"
37 
38 enum MIGRATION_COPY_DIR {
39 	FROM_RAM_TO_VRAM = 0,
40 	FROM_VRAM_TO_RAM
41 };
42 
43 int svm_migrate_to_vram(struct svm_range *prange,  uint32_t best_loc,
44 			struct mm_struct *mm);
45 int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm);
46 unsigned long
47 svm_migrate_addr_to_pfn(struct amdgpu_device *adev, unsigned long addr);
48 
49 int svm_migrate_init(struct amdgpu_device *adev);
50 void svm_migrate_fini(struct amdgpu_device *adev);
51 
52 #else
53 
54 static inline int svm_migrate_init(struct amdgpu_device *adev)
55 {
56 	return 0;
57 }
58 static inline void svm_migrate_fini(struct amdgpu_device *adev)
59 {
60 	/* empty */
61 }
62 
63 #endif /* IS_ENABLED(CONFIG_HSA_AMD_SVM) */
64 
65 #endif /* KFD_MIGRATE_H_ */
66