arch/x86/events/amd/iommu.h

   1 /*
   2  * Copyright (C) 2013 Advanced Micro Devices, Inc.
   3  *
   4  * Author: Steven Kinney <Steven.Kinney@amd.com>
   5  * Author: Suravee Suthikulpanit <Suraveee.Suthikulpanit@amd.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef _PERF_EVENT_AMD_IOMMU_H_
  13 #define _PERF_EVENT_AMD_IOMMU_H_
  14
  15 /* iommu pc mmio region register indexes */
  16 #define IOMMU_PC_COUNTER_REG                    0x00
  17 #define IOMMU_PC_COUNTER_SRC_REG                0x08
  18 #define IOMMU_PC_PASID_MATCH_REG                0x10
  19 #define IOMMU_PC_DOMID_MATCH_REG                0x18
  20 #define IOMMU_PC_DEVID_MATCH_REG                0x20
  21 #define IOMMU_PC_COUNTER_REPORT_REG             0x28
  22
  23 /* maximun specified bank/counters */
  24 #define PC_MAX_SPEC_BNKS                        64
  25 #define PC_MAX_SPEC_CNTRS                       16
  26
  27 struct amd_iommu;
  28
  29 /* amd_iommu_init.c external support functions */
  30 extern int amd_iommu_get_num_iommus(void);
  31
  32 extern bool amd_iommu_pc_supported(void);
  33
  34 extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
  35
  36 extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
  37
  38 extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  39                                 u8 fxn, u64 *value);
  40
  41 extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
  42                                 u8 fxn, u64 *value);
  43
  44 extern struct amd_iommu *get_amd_iommu(int idx);
  45
  46 #endif /*_PERF_EVENT_AMD_IOMMU_H_*/