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 
34 int amdgpu_hmm_range_get_pages(struct mmu_interval_notifier *notifier,
35 			       uint64_t start, uint64_t npages, bool readonly,
36 			       void *owner, struct page **pages,
37 			       struct hmm_range **phmm_range);
38 bool amdgpu_hmm_range_get_pages_done(struct hmm_range *hmm_range);
39 
40 #if defined(CONFIG_HMM_MIRROR)
41 int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr);
42 void amdgpu_hmm_unregister(struct amdgpu_bo *bo);
43 #else
44 static inline int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr)
45 {
46 	DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, "
47 		      "add CONFIG_ZONE_DEVICE=y in config file to fix this\n");
48 	return -ENODEV;
49 }
50 static inline void amdgpu_hmm_unregister(struct amdgpu_bo *bo) {}
51 #endif
52 
53 #endif
54