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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/include/asm/imc-pmu.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/imc-pmu.h b/arch/powerpc/include/asm/imc-pmu.h new file mode 100644 index 000000000..69f516ecb --- /dev/null +++ b/arch/powerpc/include/asm/imc-pmu.h @@ -0,0 +1,132 @@ +#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 + +/* + * 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; +}; + +/* 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); +extern void unregister_thread_imc(void); +#endif /* __ASM_POWERPC_IMC_PMU_H */ |