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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __ASM_POWERPC_IMC_PMU_H
#define __ASM_POWERPC_IMC_PMU_H
/*
* IMC Nest Performance Monitor counter support.
*
* Copyright (C) 2017 Madhavan Srinivasan, IBM Corporation.
* (C) 2017 Anju T Sudhakar, IBM Corporation.
* (C) 2017 Hemant K Shaw, IBM Corporation.
*/
#include <linux/perf_event.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/io.h>
#include <asm/opal.h>
/*
* Compatibility macros for IMC devices
*/
#define IMC_DTB_COMPAT "ibm,opal-in-memory-counters"
#define IMC_DTB_UNIT_COMPAT "ibm,imc-counters"
/*
* LDBAR: Counter address and Enable/Disable macro.
* perf/imc-pmu.c has the LDBAR layout information.
*/
#define THREAD_IMC_LDBAR_MASK 0x0003ffffffffe000ULL
#define THREAD_IMC_ENABLE 0x8000000000000000ULL
#define TRACE_IMC_ENABLE 0x4000000000000000ULL
/*
* For debugfs interface for imc-mode and imc-command
*/
#define IMC_CNTL_BLK_OFFSET 0x3FC00
#define IMC_CNTL_BLK_CMD_OFFSET 8
#define IMC_CNTL_BLK_MODE_OFFSET 32
/*
* Structure to hold memory address information for imc units.
*/
struct imc_mem_info {
u64 *vbase;
u32 id;
};
/*
* Place holder for nest pmu events and values.
*/
struct imc_events {
u32 value;
char *name;
char *unit;
char *scale;
};
/*
* Trace IMC hardware updates a 64bytes record on
* Core Performance Monitoring Counter (CPMC)
* overflow. Here is the layout for the trace imc record
*
* DW 0 : Timebase
* DW 1 : Program Counter
* DW 2 : PIDR information
* DW 3 : CPMC1
* DW 4 : CPMC2
* DW 5 : CPMC3
* Dw 6 : CPMC4
* DW 7 : Timebase
* .....
*
* The following is the data structure to hold trace imc data.
*/
struct trace_imc_data {
u64 tb1;
u64 ip;
u64 val;
u64 cpmc1;
u64 cpmc2;
u64 cpmc3;
u64 cpmc4;
u64 tb2;
};
/* Event attribute array index */
#define IMC_FORMAT_ATTR 0
#define IMC_EVENT_ATTR 1
#define IMC_CPUMASK_ATTR 2
#define IMC_NULL_ATTR 3
/* PMU Format attribute macros */
#define IMC_EVENT_OFFSET_MASK 0xffffffffULL
/*
* Macro to mask bits 0:21 of first double word(which is the timebase) to
* compare with 8th double word (timebase) of trace imc record data.
*/
#define IMC_TRACE_RECORD_TB1_MASK 0x3ffffffffffULL
/*
* Device tree parser code detects IMC pmu support and
* registers new IMC pmus. This structure will hold the
* pmu functions, events, counter memory information
* and attrs for each imc pmu and will be referenced at
* the time of pmu registration.
*/
struct imc_pmu {
struct pmu pmu;
struct imc_mem_info *mem_info;
struct imc_events *events;
/*
* Attribute groups for the PMU. Slot 0 used for
* format attribute, slot 1 used for cpusmask attribute,
* slot 2 used for event attribute. Slot 3 keep as
* NULL.
*/
const struct attribute_group *attr_groups[4];
u32 counter_mem_size;
int domain;
/*
* flag to notify whether the memory is mmaped
* or allocated by kernel.
*/
bool imc_counter_mmaped;
};
/*
* Structure to hold id, lock and reference count for the imc events which
* are inited.
*/
struct imc_pmu_ref {
struct mutex lock;
unsigned int id;
int refc;
};
/*
* In-Memory Collection Counters type.
* Data comes from Device tree.
* Three device type are supported.
*/
enum {
IMC_TYPE_THREAD = 0x1,
IMC_TYPE_TRACE = 0x2,
IMC_TYPE_CORE = 0x4,
IMC_TYPE_CHIP = 0x10,
};
/*
* Domains for IMC PMUs
*/
#define IMC_DOMAIN_NEST 1
#define IMC_DOMAIN_CORE 2
#define IMC_DOMAIN_THREAD 3
/* For trace-imc the domain is still thread but it operates in trace-mode */
#define IMC_DOMAIN_TRACE 4
extern int init_imc_pmu(struct device_node *parent,
struct imc_pmu *pmu_ptr, int pmu_id);
extern void thread_imc_disable(void);
extern int get_max_nest_dev(void);
extern void unregister_thread_imc(void);
#endif /* __ASM_POWERPC_IMC_PMU_H */
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