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/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
/* Copyright 2025-2026 Arm, Ltd. */
#ifndef __ETHOSU_DRV_H__
#define __ETHOSU_DRV_H__
#include <linux/mutex.h>
#include <linux/xarray.h>
#include <drm/gpu_scheduler.h>
struct ethosu_device;
struct drm_device;
struct drm_file;
struct ethosu_file_priv {
struct ethosu_device *edev;
struct drm_sched_entity sched_entity;
struct xarray perfmons;
};
/* Performance monitor object. The perfmon lifetime is controlled by userspace
* using perfmon related ioctls. A perfmon can be attached to a DRM_ETHOSU_SUBMIT
* request, and when this is the case, HW perf counters will be activated just
* before the job is submitted to the NPU and disabled when the job is
* done. This way, only events related to a specific job will be counted.
*/
struct ethosu_perfmon {
/* Tracks the number of users of the perfmon, when this counter reaches
* zero the perfmon is destroyed.
*/
refcount_t refcnt;
/* Number of counters activated in this perfmon instance
* (should be less than or equal to DRM_ETHOSU_MAX_PERF_COUNTERS).
*/
u8 ncounters;
/* Events counted by the HW perf counters. */
u16 counters[DRM_ETHOSU_MAX_PERF_EVENT_COUNTERS];
/*
* Storage for counter values. Counters are incremented by the HW
* perf counter values every time the perfmon is attached to an
* NPU job. This way, perfmon users don't have to retrieve the
* results after each job if they want to track events covering
* several submissions. Note that counter values can't be reset,
* but you can fake a reset by destroying the perfmon and
* creating a new one.
*/
u64 values[] __counted_by(ncounters);
};
/* ethosu_perfmon.c */
void ethosu_perfmon_get(struct ethosu_perfmon *perfmon);
void ethosu_perfmon_put(struct ethosu_perfmon *perfmon);
void ethosu_perfmon_start(struct ethosu_device *ethosu,
struct ethosu_perfmon *perfmon);
void ethosu_perfmon_stop(struct ethosu_device *ethosu,
struct ethosu_perfmon *perfmon, bool capture);
void ethosu_perfmon_stop_locked(struct ethosu_device *ethosu, struct ethosu_perfmon *perfmon,
bool capture);
struct ethosu_perfmon *ethosu_perfmon_find(struct ethosu_file_priv *ethosu_priv,
int id);
void ethosu_perfmon_open_file(struct ethosu_file_priv *ethosu_priv);
void ethosu_perfmon_close_file(struct ethosu_file_priv *ethosu_priv);
int ethosu_ioctl_perfmon_create(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int ethosu_ioctl_perfmon_destroy(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int ethosu_ioctl_perfmon_get_values(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int ethosu_ioctl_perfmon_set_global(struct drm_device *dev, void *data,
struct drm_file *file_priv);
#endif
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