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| 2 | * Copyright 2017 Advanced Micro Devices, Inc.
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| 3 | *
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 5 | * copy of this software and associated documentation files (the "Software"),
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| 6 | * to deal in the Software without restriction, including without limitation
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the
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| 9 | * Software is furnished to do so, subject to the following conditions:
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| 10 | *
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| 11 | * The above copyright notice and this permission notice shall be included in
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| 12 | * all copies or substantial portions of the Software.
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| 13 | *
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| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 20 | * OTHER DEALINGS IN THE SOFTWARE.
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| 21 | *
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| 22 | * Authors: Christian König
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| 23 |
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| 24 | #ifndef __AMDGPU_MN_H__
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| 25 | #define __AMDGPU_MN_H__
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| 26 |
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| 27 | #include <linux/types.h>
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| 28 | #include <linux/hmm.h>
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| 29 | #include <linux/rwsem.h>
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| 30 | #include <linux/workqueue.h>
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| 31 | #include <linux/interval_tree.h>
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| 32 | #include <linux/mmu_notifier.h>
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| 33 |
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| 34 | struct amdgpu_hmm_range {
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| 35 | struct hmm_range hmm_range;
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| 36 | struct amdgpu_bo *bo;
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| 37 | };
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| 38 |
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| 39 | int amdgpu_hmm_range_get_pages(struct mmu_interval_notifier *notifier,
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| 40 | uint64_t start, uint64_t npages, bool readonly,
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| 41 | void *owner,
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| 42 | struct amdgpu_hmm_range *range);
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| 43 |
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| 44 | #if defined(CONFIG_HMM_MIRROR)
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| 45 | bool amdgpu_hmm_range_valid(struct amdgpu_hmm_range *range);
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| 46 | struct amdgpu_hmm_range *amdgpu_hmm_range_alloc(struct amdgpu_bo *bo);
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| 47 | void amdgpu_hmm_range_free(struct amdgpu_hmm_range *range);
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| 48 | int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr);
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| 49 | void amdgpu_hmm_unregister(struct amdgpu_bo *bo);
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| 50 | #else
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| 51 | static inline int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr)
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| 52 | {
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| 53 | DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, "
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| 54 | "add CONFIG_ZONE_DEVICE=y in config file to fix this\n");
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| 55 | return -ENODEV;
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| 56 | }
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| 57 |
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| 58 | static inline void amdgpu_hmm_unregister(struct amdgpu_bo *bo) {}
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| 59 |
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| 60 | static inline bool amdgpu_hmm_range_valid(struct amdgpu_hmm_range *range)
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| 61 | {
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| 62 | return false;
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| 63 | }
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| 64 |
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| 65 | static inline struct amdgpu_hmm_range *amdgpu_hmm_range_alloc(struct amdgpu_bo *bo)
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| 66 | {
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| 67 | return NULL;
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| 68 | }
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| 69 |
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| 70 | static inline void amdgpu_hmm_range_free(struct amdgpu_hmm_range *range) {}
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| 71 | #endif
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| 72 |
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| 73 | #endif
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