1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /*
3 * Copyright 2018-2022 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 #ifndef __KFD_IOMMU_H__
25 #define __KFD_IOMMU_H__
26
27 #include <linux/kconfig.h>
28
29 #if IS_REACHABLE(CONFIG_AMD_IOMMU_V2)
30
31 #define KFD_SUPPORT_IOMMU_V2
32
33 int kfd_iommu_check_device(struct kfd_dev *kfd);
34 int kfd_iommu_device_init(struct kfd_dev *kfd);
35
36 int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
37 void kfd_iommu_unbind_process(struct kfd_process *p);
38
39 void kfd_iommu_suspend(struct kfd_dev *kfd);
40 int kfd_iommu_resume(struct kfd_dev *kfd);
41
42 int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
43
44 #else
45
kfd_iommu_check_device(struct kfd_dev * kfd)46 static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
47 {
48 return -ENODEV;
49 }
kfd_iommu_device_init(struct kfd_dev * kfd)50 static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
51 {
52 #if IS_MODULE(CONFIG_AMD_IOMMU_V2)
53 WARN_ONCE(1, "iommu_v2 module is not usable by built-in KFD");
54 #endif
55 return 0;
56 }
57
kfd_iommu_bind_process_to_device(struct kfd_process_device * pdd)58 static inline int kfd_iommu_bind_process_to_device(
59 struct kfd_process_device *pdd)
60 {
61 return 0;
62 }
kfd_iommu_unbind_process(struct kfd_process * p)63 static inline void kfd_iommu_unbind_process(struct kfd_process *p)
64 {
65 /* empty */
66 }
67
kfd_iommu_suspend(struct kfd_dev * kfd)68 static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
69 {
70 /* empty */
71 }
kfd_iommu_resume(struct kfd_dev * kfd)72 static inline int kfd_iommu_resume(struct kfd_dev *kfd)
73 {
74 return 0;
75 }
76
kfd_iommu_add_perf_counters(struct kfd_topology_device * kdev)77 static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
78 {
79 return 0;
80 }
81
82 #endif /* IS_REACHABLE(CONFIG_AMD_IOMMU_V2) */
83
84 #endif /* __KFD_IOMMU_H__ */
85