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#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.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or later version.
*/
#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
/*
* 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;
};
/* 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
/*
* 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_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
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);
#endif /* __ASM_POWERPC_IMC_PMU_H */
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