arch/x86/events/amd/iommu.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2013 Advanced Micro Devices, Inc.
   4  *
   5  * Author: Steven Kinney <Steven.Kinney@amd.com>
   6  * Author: Suravee Suthikulpanit <Suraveee.Suthikulpanit@amd.com>
   7  */
   8
   9 #ifndef _PERF_EVENT_AMD_IOMMU_H_
  10 #define _PERF_EVENT_AMD_IOMMU_H_
  11
  12 /* iommu pc mmio region register indexes */
  13 #define IOMMU_PC_COUNTER_REG                    0x00
  14 #define IOMMU_PC_COUNTER_SRC_REG                0x08
  15 #define IOMMU_PC_PASID_MATCH_REG                0x10
  16 #define IOMMU_PC_DOMID_MATCH_REG                0x18
  17 #define IOMMU_PC_DEVID_MATCH_REG                0x20
  18 #define IOMMU_PC_COUNTER_REPORT_REG             0x28
  19
  20 /* maximun specified bank/counters */
  21 #define PC_MAX_SPEC_BNKS                        64
  22 #define PC_MAX_SPEC_CNTRS                       16
  23
  24 struct amd_iommu;
  25
  26 /* amd_iommu_init.c external support functions */
  27 extern int amd_iommu_get_num_iommus(void);
  28
  29 extern bool amd_iommu_pc_supported(void);
  30
  31 extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
  32
  33 extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
  34
  35 extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  36                                 u8 fxn, u64 *value);
  37
  38 extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  39                                 u8 fxn, u64 *value);
  40
  41 extern struct amd_iommu *get_amd_iommu(int idx);
  42
  43 #endif /*_PERF_EVENT_AMD_IOMMU_H_*/