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/* SPDX-License-Identifier: GPL-2.0 */
/*
* EdgeTPU usage stats header
*
* Copyright (C) 2020 Google, Inc.
*/
#ifndef __EDGETPU_USAGE_STATS_H__
#define __EDGETPU_USAGE_STATS_H__
#include <linux/hashtable.h>
#include <linux/mutex.h>
/* Header struct in the metric buffer. */
/* Must be kept in sync with firmware struct UsageTrackerHeader */
struct usage_tracker_header {
uint32_t num_metrics; /* Number of metrics being reported */
uint32_t metric_size; /* Size of each metric struct */
};
/*
* Encapsulate TPU core usage information of a specific application for a
* specific power state.
* Must be kept in sync with firmware struct TpuUsage.
*/
struct tpu_usage {
/* Unique identifier of the application. */
int32_t uid;
/* The power state of the device (values are chip dependent) */
uint32_t power_state;
/* Duration of usage in microseconds. */
uint32_t duration_us;
};
/* Must be kept in sync with firmware enum class UsageTrackerMetric::Type */
enum usage_tracker_metric_type {
metric_type_reserved = 0,
metric_type_tpu_usage = 1,
};
/*
* Encapsulates a single metric reported to the kernel.
* Must be kept in sync with firmware struct UsageTrackerMetric.
*/
struct usage_tracker_metric {
uint32_t type;
uint8_t reserved[4];
union {
struct tpu_usage tpu_usage;
};
};
#define UID_HASH_BITS 3
struct edgetpu_usage_stats {
DECLARE_HASHTABLE(uid_hash_table, UID_HASH_BITS);
struct mutex usage_stats_lock;
};
int edgetpu_usage_stats_add(int32_t uid, uint32_t state, uint32_t duration,
struct edgetpu_dev *etdev);
void edgetpu_usage_stats_process_buffer(struct edgetpu_dev *etdev, void *buf);
void edgetpu_usage_stats_init(struct edgetpu_dev *etdev);
void edgetpu_usage_stats_exit(struct edgetpu_dev *etdev);
#endif /* __EDGETPU_USAGE_STATS_H__ */
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