1 /* $NetBSD: kfd_iommu.h,v 1.2 2021/12/18 23:44:59 riastradh Exp $ */
2
3 /*
4 * Copyright 2018 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #ifndef __KFD_IOMMU_H__
26 #define __KFD_IOMMU_H__
27
28 #if defined(CONFIG_AMD_IOMMU_V2_MODULE) || defined(CONFIG_AMD_IOMMU_V2)
29
30 #define KFD_SUPPORT_IOMMU_V2
31
32 int kfd_iommu_check_device(struct kfd_dev *kfd);
33 int kfd_iommu_device_init(struct kfd_dev *kfd);
34
35 int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
36 void kfd_iommu_unbind_process(struct kfd_process *p);
37
38 void kfd_iommu_suspend(struct kfd_dev *kfd);
39 int kfd_iommu_resume(struct kfd_dev *kfd);
40
41 int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
42
43 #else
44
kfd_iommu_check_device(struct kfd_dev * kfd)45 static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
46 {
47 return -ENODEV;
48 }
kfd_iommu_device_init(struct kfd_dev * kfd)49 static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
50 {
51 return 0;
52 }
53
kfd_iommu_bind_process_to_device(struct kfd_process_device * pdd)54 static inline int kfd_iommu_bind_process_to_device(
55 struct kfd_process_device *pdd)
56 {
57 return 0;
58 }
kfd_iommu_unbind_process(struct kfd_process * p)59 static inline void kfd_iommu_unbind_process(struct kfd_process *p)
60 {
61 /* empty */
62 }
63
kfd_iommu_suspend(struct kfd_dev * kfd)64 static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
65 {
66 /* empty */
67 }
kfd_iommu_resume(struct kfd_dev * kfd)68 static inline int kfd_iommu_resume(struct kfd_dev *kfd)
69 {
70 return 0;
71 }
72
kfd_iommu_add_perf_counters(struct kfd_topology_device * kdev)73 static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
74 {
75 return 0;
76 }
77
78 #endif /* defined(CONFIG_AMD_IOMMU_V2) */
79
80 #endif /* __KFD_IOMMU_H__ */
81