1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2018 Advanced Micro Devices, Inc.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in
12*4882a593Smuzhiyun * all copies or substantial portions of the Software.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*4882a593Smuzhiyun * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE.
21*4882a593Smuzhiyun */
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #ifndef __KFD_IOMMU_H__
24*4882a593Smuzhiyun #define __KFD_IOMMU_H__
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include <linux/kconfig.h>
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #if IS_REACHABLE(CONFIG_AMD_IOMMU_V2)
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #define KFD_SUPPORT_IOMMU_V2
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun int kfd_iommu_check_device(struct kfd_dev *kfd);
33*4882a593Smuzhiyun int kfd_iommu_device_init(struct kfd_dev *kfd);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
36*4882a593Smuzhiyun void kfd_iommu_unbind_process(struct kfd_process *p);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun void kfd_iommu_suspend(struct kfd_dev *kfd);
39*4882a593Smuzhiyun int kfd_iommu_resume(struct kfd_dev *kfd);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #else
44*4882a593Smuzhiyun
kfd_iommu_check_device(struct kfd_dev * kfd)45*4882a593Smuzhiyun static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun return -ENODEV;
48*4882a593Smuzhiyun }
kfd_iommu_device_init(struct kfd_dev * kfd)49*4882a593Smuzhiyun static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun #if IS_MODULE(CONFIG_AMD_IOMMU_V2)
52*4882a593Smuzhiyun WARN_ONCE(1, "iommu_v2 module is not usable by built-in KFD");
53*4882a593Smuzhiyun #endif
54*4882a593Smuzhiyun return 0;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
kfd_iommu_bind_process_to_device(struct kfd_process_device * pdd)57*4882a593Smuzhiyun static inline int kfd_iommu_bind_process_to_device(
58*4882a593Smuzhiyun struct kfd_process_device *pdd)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun return 0;
61*4882a593Smuzhiyun }
kfd_iommu_unbind_process(struct kfd_process * p)62*4882a593Smuzhiyun static inline void kfd_iommu_unbind_process(struct kfd_process *p)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun /* empty */
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
kfd_iommu_suspend(struct kfd_dev * kfd)67*4882a593Smuzhiyun static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun /* empty */
70*4882a593Smuzhiyun }
kfd_iommu_resume(struct kfd_dev * kfd)71*4882a593Smuzhiyun static inline int kfd_iommu_resume(struct kfd_dev *kfd)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun return 0;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
kfd_iommu_add_perf_counters(struct kfd_topology_device * kdev)76*4882a593Smuzhiyun static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun #endif /* IS_REACHABLE(CONFIG_AMD_IOMMU_V2) */
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun #endif /* __KFD_IOMMU_H__ */
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