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      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 
     45 static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
     46 {
     47 	return -ENODEV;
     48 }
     49 static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
     50 {
     51 	return 0;
     52 }
     53 
     54 static inline int kfd_iommu_bind_process_to_device(
     55 	struct kfd_process_device *pdd)
     56 {
     57 	return 0;
     58 }
     59 static inline void kfd_iommu_unbind_process(struct kfd_process *p)
     60 {
     61 	/* empty */
     62 }
     63 
     64 static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
     65 {
     66 	/* empty */
     67 }
     68 static inline int kfd_iommu_resume(struct kfd_dev *kfd)
     69 {
     70 	return 0;
     71 }
     72 
     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