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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 Chelsio Communications. All rights reserved.
*
* Written by: Ganesh Goudar (ganeshgr@chelsio.com)
*/
#include "cxgb4.h"
#define CXGB4_NUM_TRIPS 1
static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev,
int *temp)
{
struct adapter *adap = thermal_zone_device_priv(tzdev);
u32 param, val;
int ret;
param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP));
ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
¶m, &val);
if (ret < 0 || val == 0)
return -1;
*temp = val * 1000;
return 0;
}
static struct thermal_zone_device_ops cxgb4_thermal_ops = {
.get_temp = cxgb4_thermal_get_temp,
};
static struct thermal_trip trip = { .type = THERMAL_TRIP_CRITICAL } ;
int cxgb4_thermal_init(struct adapter *adap)
{
struct ch_thermal *ch_thermal = &adap->ch_thermal;
char ch_tz_name[THERMAL_NAME_LENGTH];
int num_trip = CXGB4_NUM_TRIPS;
u32 param, val;
int ret;
/* on older firmwares we may not get the trip temperature,
* set the num of trips to 0.
*/
param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH));
ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
¶m, &val);
if (ret < 0) {
num_trip = 0; /* could not get trip temperature */
} else {
trip.temperature = val * 1000;
}
snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
ch_thermal->tzdev = thermal_zone_device_register_with_trips(ch_tz_name, &trip, num_trip,
adap,
&cxgb4_thermal_ops,
NULL, 0, 0);
if (IS_ERR(ch_thermal->tzdev)) {
ret = PTR_ERR(ch_thermal->tzdev);
dev_err(adap->pdev_dev, "Failed to register thermal zone\n");
ch_thermal->tzdev = NULL;
return ret;
}
ret = thermal_zone_device_enable(ch_thermal->tzdev);
if (ret) {
dev_err(adap->pdev_dev, "Failed to enable thermal zone\n");
thermal_zone_device_unregister(adap->ch_thermal.tzdev);
return ret;
}
return 0;
}
int cxgb4_thermal_remove(struct adapter *adap)
{
if (adap->ch_thermal.tzdev) {
thermal_zone_device_unregister(adap->ch_thermal.tzdev);
adap->ch_thermal.tzdev = NULL;
}
return 0;
}
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