adreno_perfcounter.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2008-2015,2017,2019-2021 The Linux Foundation. All rights reserved.
 */
#ifndef __ADRENO_PERFCOUNTER_H
#define __ADRENO_PERFCOUNTER_H

struct adreno_device;

/* ADRENO_PERFCOUNTERS - Given an adreno device, return the perfcounters list */
#define ADRENO_PERFCOUNTERS(_a) ((_a)->gpucore->perfcounters)

#define PERFCOUNTER_FLAG_NONE 0x0
#define PERFCOUNTER_FLAG_KERNEL 0x1

/* Structs to maintain the list of active performance counters */

/**
 * struct adreno_perfcount_register: register state
 * @countable: countable the register holds
 * @kernelcount: number of user space users of the register
 * @usercount: number of kernel users of the register
 * @offset: register hardware offset
 * @load_bit: The bit number in LOAD register which corresponds to this counter
 * @select: The countable register offset
 * @value: The 64 bit countable register value
 */
struct adreno_perfcount_register {
	unsigned int countable;
	unsigned int kernelcount;
	unsigned int usercount;
	unsigned int offset;
	unsigned int offset_hi;
	int load_bit;
	unsigned int select;
	uint64_t value;
};

/**
 * struct adreno_perfcount_group: registers for a hardware group
 * @regs: available registers for this group
 * @reg_count: total registers for this group
 * @name: group name for this group
 */
struct adreno_perfcount_group {
	struct adreno_perfcount_register *regs;
	unsigned int reg_count;
	const char *name;
	unsigned long flags;
	int (*enable)(struct adreno_device *adreno_dev,
		const struct adreno_perfcount_group *group,
		unsigned int counter, unsigned int countable);
	u64 (*read)(struct adreno_device *adreno_dev,
		const struct adreno_perfcount_group *group,
		unsigned int counter);
	void (*load)(struct adreno_device *adreno_dev,
		struct adreno_perfcount_register *reg);
};

/*
 * ADRENO_PERFCOUNTER_GROUP_FIXED indicates that a perfcounter group is fixed -
 * instead of having configurable countables like the other groups, registers in
 * fixed groups have a hardwired countable.  So when the user requests a
 * countable in one of these groups, that countable should be used as the
 * register offset to return
 */

#define ADRENO_PERFCOUNTER_GROUP_FIXED BIT(0)

/*
 * ADRENO_PERFCOUNTER_GROUP_RESTORE indicates CP needs to restore the select
 * registers of this perfcounter group as part of preemption and IFPC
 */
#define ADRENO_PERFCOUNTER_GROUP_RESTORE BIT(1)


/**
 * adreno_perfcounts: all available perfcounter groups
 * @groups: available groups for this device
 * @group_count: total groups for this device
 */
struct adreno_perfcounters {
	const struct adreno_perfcount_group *groups;
	unsigned int group_count;
};

#define ADRENO_PERFCOUNTER_GROUP_FLAGS(core, offset, name, flags, \
		enable, read, load) \
	[KGSL_PERFCOUNTER_GROUP_##offset] = { core##_perfcounters_##name, \
	ARRAY_SIZE(core##_perfcounters_##name), __stringify(name), flags, \
	enable, read, load }

#define ADRENO_PERFCOUNTER_GROUP(core, offset, name, enable, read, load) \
	ADRENO_PERFCOUNTER_GROUP_FLAGS(core, offset, name, 0, enable, read, \
			load)

int adreno_perfcounter_query_group(struct adreno_device *adreno_dev,
	unsigned int groupid, unsigned int __user *countables,
	unsigned int count, unsigned int *max_counters);

int adreno_perfcounter_read_group(struct adreno_device *adreno_dev,
	struct kgsl_perfcounter_read_group __user *reads, unsigned int count);

void adreno_perfcounter_restore(struct adreno_device *adreno_dev);

void adreno_perfcounter_save(struct adreno_device *adreno_dev);

void adreno_perfcounter_start(struct adreno_device *adreno_dev);

int adreno_perfcounter_get_groupid(struct adreno_device *adreno_dev,
					const char *name);

uint64_t adreno_perfcounter_read(struct adreno_device *adreno_dev,
	unsigned int group, unsigned int counter);

const char *adreno_perfcounter_get_name(struct adreno_device
					*adreno_dev, unsigned int groupid);

int adreno_perfcounter_get(struct adreno_device *adreno_dev,
	unsigned int groupid, unsigned int countable, unsigned int *offset,
	unsigned int *offset_hi, unsigned int flags);

int adreno_perfcounter_put(struct adreno_device *adreno_dev,
	unsigned int groupid, unsigned int countable, unsigned int flags);

static inline int adreno_perfcounter_kernel_get(
		struct adreno_device *adreno_dev,
		int group, int countable, u32 *lo, u32 *hi)
{
	if (*lo)
		return 0;

	return adreno_perfcounter_get(adreno_dev, group, countable, lo, hi,
		PERFCOUNTER_FLAG_KERNEL);
}

#endif /* __ADRENO_PERFCOUNTER_H */