cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

kfd_iommu.h (2490B)

      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
     33int kfd_iommu_check_device(struct kfd_dev *kfd);
     34int kfd_iommu_device_init(struct kfd_dev *kfd);
     35
     36int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
     37void kfd_iommu_unbind_process(struct kfd_process *p);
     38
     39void kfd_iommu_suspend(struct kfd_dev *kfd);
     40int kfd_iommu_resume(struct kfd_dev *kfd);
     41
     42int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
     43
     44#else
     45
     46static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
     47{
     48	return -ENODEV;
     49}
     50static 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
     58static inline int kfd_iommu_bind_process_to_device(
     59	struct kfd_process_device *pdd)
     60{
     61	return 0;
     62}
     63static inline void kfd_iommu_unbind_process(struct kfd_process *p)
     64{
     65	/* empty */
     66}
     67
     68static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
     69{
     70	/* empty */
     71}
     72static inline int kfd_iommu_resume(struct kfd_dev *kfd)
     73{
     74	return 0;
     75}
     76
     77static 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__ */