xref: /kernel/linux/linux-5.10/arch/x86/events/amd/iommu.h (revision 8c2ecf20)
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
24struct amd_iommu;
25
26/* amd_iommu_init.c external support functions */
27extern int amd_iommu_get_num_iommus(void);
28
29extern bool amd_iommu_pc_supported(void);
30
31extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
32
33extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
34
35extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
36				u8 fxn, u64 *value);
37
38extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
39				u8 fxn, u64 *value);
40
41extern struct amd_iommu *get_amd_iommu(int idx);
42
43#endif /*_PERF_EVENT_AMD_IOMMU_H_*/
44