1 /*
2 * Copyright 2018 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
23 #ifndef __KFD_IOMMU_H__
24 #define __KFD_IOMMU_H__
25
26 #include <linux/kconfig.h>
27
28 #if IS_REACHABLE(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 #if IS_MODULE(CONFIG_AMD_IOMMU_V2)
52 WARN_ONCE(1, "iommu_v2 module is not usable by built-in KFD");
53 #endif
54 return 0;
55 }
56
kfd_iommu_bind_process_to_device(struct kfd_process_device * pdd)57 static inline int kfd_iommu_bind_process_to_device(
58 struct kfd_process_device *pdd)
59 {
60 return 0;
61 }
kfd_iommu_unbind_process(struct kfd_process * p)62 static inline void kfd_iommu_unbind_process(struct kfd_process *p)
63 {
64 /* empty */
65 }
66
kfd_iommu_suspend(struct kfd_dev * kfd)67 static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
68 {
69 /* empty */
70 }
kfd_iommu_resume(struct kfd_dev * kfd)71 static inline int kfd_iommu_resume(struct kfd_dev *kfd)
72 {
73 return 0;
74 }
75
kfd_iommu_add_perf_counters(struct kfd_topology_device * kdev)76 static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
77 {
78 return 0;
79 }
80
81 #endif /* IS_REACHABLE(CONFIG_AMD_IOMMU_V2) */
82
83 #endif /* __KFD_IOMMU_H__ */
84