drivers/gpu/drm/amd/amdkfd/kfd_iommu.h

   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 #if defined(CONFIG_AMD_IOMMU_V2_MODULE) || defined(CONFIG_AMD_IOMMU_V2)
  27
  28 #define KFD_SUPPORT_IOMMU_V2
  29
  30 int kfd_iommu_check_device(struct kfd_dev *kfd);
  31 int kfd_iommu_device_init(struct kfd_dev *kfd);
  32
  33 int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
  34 void kfd_iommu_unbind_process(struct kfd_process *p);
  35
  36 void kfd_iommu_suspend(struct kfd_dev *kfd);
  37 int kfd_iommu_resume(struct kfd_dev *kfd);
  38
  39 int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
  40
  41 #else
  42
  43 static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
  44 {
  45         return -ENODEV;
  46 }
  47 static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
  48 {
  49         return 0;
  50 }
  51
  52 static inline int kfd_iommu_bind_process_to_device(
  53         struct kfd_process_device *pdd)
  54 {
  55         return 0;
  56 }
  57 static inline void kfd_iommu_unbind_process(struct kfd_process *p)
  58 {
  59         /* empty */
  60 }
  61
  62 static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
  63 {
  64         /* empty */
  65 }
  66 static inline int kfd_iommu_resume(struct kfd_dev *kfd)
  67 {
  68         return 0;
  69 }
  70
  71 static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
  72 {
  73         return 0;
  74 }
  75
  76 #endif /* defined(CONFIG_AMD_IOMMU_V2) */
  77
  78 #endif /* __KFD_IOMMU_H__ */