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// SPDX-License-Identifier: GPL-2.0
/*
* EdgeTPU thermal management.
*
* Copyright (C) 2023 Google LLC
*/
#include <linux/device.h>
#include <gcip/gcip-pm.h>
#include <gcip/gcip-thermal.h>
#include "edgetpu-internal.h"
#include "edgetpu-kci.h"
#include "edgetpu-soc.h"
#include "edgetpu-thermal.h"
static int __edgetpu_thermal_get_rate(void *data, unsigned long *rate)
{
struct edgetpu_dev *etdev = data;
long ret = edgetpu_soc_pm_get_rate(etdev, 0);
if (ret < 0)
return ret;
*rate = ret;
return 0;
}
static int __edgetpu_thermal_set_rate(void *data, unsigned long rate)
{
struct edgetpu_dev *etdev = data;
int ret;
edgetpu_kci_block_bus_speed_control(etdev, true);
ret = edgetpu_kci_notify_throttling(etdev, rate);
if (ret)
etdev_err_ratelimited(etdev, "Failed to notify FW about power rate %lu, error:%d",
rate, ret);
edgetpu_kci_block_bus_speed_control(etdev, false);
return ret;
}
int edgetpu_thermal_set_rate(struct edgetpu_dev *etdev, unsigned long rate)
{
return __edgetpu_thermal_set_rate(etdev, rate);
}
static int __edgetpu_thermal_control(void *data, bool enable)
{
return edgetpu_kci_thermal_control(data, enable);
}
int edgetpu_thermal_create(struct edgetpu_dev *etdev)
{
const struct gcip_thermal_args args = {
.dev = etdev->dev,
.pm = etdev->pm,
.dentry = edgetpu_fs_debugfs_dir(),
.node_name = EDGETPU_COOLING_NAME,
.type = EDGETPU_COOLING_NAME,
.data = etdev,
.get_rate = __edgetpu_thermal_get_rate,
.set_rate = __edgetpu_thermal_set_rate,
.control = __edgetpu_thermal_control,
};
struct gcip_thermal *thermal = gcip_thermal_create(&args);
if (IS_ERR(thermal))
return PTR_ERR(thermal);
etdev->thermal = thermal;
edgetpu_soc_thermal_init(etdev);
return 0;
}
void edgetpu_thermal_destroy(struct edgetpu_dev *etdev)
{
edgetpu_soc_thermal_exit(etdev);
gcip_thermal_destroy(etdev->thermal);
etdev->thermal = NULL;
}
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