| 1 | /* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
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| 2 | /* |
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| 3 | * Copyright 2018-2022 Advanced Micro Devices, Inc. |
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| 4 | * |
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| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 6 | * copy of this software and associated documentation files (the "Software"), |
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| 7 | * to deal in the Software without restriction, including without limitation |
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| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 9 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 10 | * Software is furnished to do so, subject to the following conditions: |
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| 11 | * |
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| 12 | * The above copyright notice and this permission notice shall be included in |
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| 13 | * all copies or substantial portions of the Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 21 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 22 | */ |
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| 23 | |
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| 24 | #ifndef __KFD_IOMMU_H__ |
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| 25 | #define __KFD_IOMMU_H__ |
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| 26 | |
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| 27 | #include <linux/kconfig.h> |
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| 28 | |
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| 29 | #if IS_REACHABLE(CONFIG_AMD_IOMMU_V2) |
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| 30 | |
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| 31 | #define KFD_SUPPORT_IOMMU_V2 |
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| 32 | |
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| 33 | int kfd_iommu_check_device(struct kfd_dev *kfd); |
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| 34 | int kfd_iommu_device_init(struct kfd_dev *kfd); |
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| 35 | |
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| 36 | int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd); |
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| 37 | void kfd_iommu_unbind_process(struct kfd_process *p); |
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| 38 | |
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| 39 | void kfd_iommu_suspend(struct kfd_dev *kfd); |
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| 40 | int kfd_iommu_resume(struct kfd_dev *kfd); |
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| 41 | |
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| 42 | int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev); |
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| 43 | |
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| 44 | #else |
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| 45 | |
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| 46 | static inline int kfd_iommu_check_device(struct kfd_dev *kfd) |
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| 47 | { |
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| 48 | return -ENODEV; |
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| 49 | } |
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| 50 | static inline int kfd_iommu_device_init(struct kfd_dev *kfd) |
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| 51 | { |
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| 52 | #if IS_MODULE(CONFIG_AMD_IOMMU_V2) |
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| 53 | WARN_ONCE(1, "iommu_v2 module is not usable by built-in KFD" ); |
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| 54 | #endif |
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| 55 | return 0; |
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| 56 | } |
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| 57 | |
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| 58 | static inline int kfd_iommu_bind_process_to_device( |
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| 59 | struct kfd_process_device *pdd) |
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| 60 | { |
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| 61 | return 0; |
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| 62 | } |
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| 63 | static inline void kfd_iommu_unbind_process(struct kfd_process *p) |
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| 64 | { |
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| 65 | /* empty */ |
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| 66 | } |
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| 67 | |
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| 68 | static inline void kfd_iommu_suspend(struct kfd_dev *kfd) |
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| 69 | { |
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| 70 | /* empty */ |
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| 71 | } |
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| 72 | static inline int kfd_iommu_resume(struct kfd_dev *kfd) |
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| 73 | { |
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| 74 | return 0; |
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| 75 | } |
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| 76 | |
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| 77 | static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev) |
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| 78 | { |
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| 79 | return 0; |
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| 80 | } |
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| 81 | |
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| 82 | #endif /* IS_REACHABLE(CONFIG_AMD_IOMMU_V2) */ |
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| 83 | |
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| 84 | #endif /* __KFD_IOMMU_H__ */ |
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| 85 | |
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