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Add thermal zone support to monitor ASIC's temperature. Signed-off-by: Ganesh Goudar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /* | ||
| * Copyright (C) 2017 Chelsio Communications. All rights reserved. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms and conditions of the GNU General Public License, | ||
| * version 2, as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
| * more details. | ||
| * | ||
| * The full GNU General Public License is included in this distribution in | ||
| * the file called "COPYING". | ||
| * | ||
| * Written by: Ganesh Goudar ([email protected]) | ||
| */ | ||
|
|
||
| #include "cxgb4.h" | ||
|
|
||
| #define CXGB4_NUM_TRIPS 1 | ||
|
|
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| static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev, | ||
| int *temp) | ||
| { | ||
| struct adapter *adap = tzdev->devdata; | ||
| 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; | ||
| } | ||
|
|
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| static int cxgb4_thermal_get_trip_type(struct thermal_zone_device *tzdev, | ||
| int trip, enum thermal_trip_type *type) | ||
| { | ||
| struct adapter *adap = tzdev->devdata; | ||
|
|
||
| if (!adap->ch_thermal.trip_temp) | ||
| return -EINVAL; | ||
|
|
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| *type = adap->ch_thermal.trip_type; | ||
| return 0; | ||
| } | ||
|
|
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| static int cxgb4_thermal_get_trip_temp(struct thermal_zone_device *tzdev, | ||
| int trip, int *temp) | ||
| { | ||
| struct adapter *adap = tzdev->devdata; | ||
|
|
||
| if (!adap->ch_thermal.trip_temp) | ||
| return -EINVAL; | ||
|
|
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| *temp = adap->ch_thermal.trip_temp; | ||
| return 0; | ||
| } | ||
|
|
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| static struct thermal_zone_device_ops cxgb4_thermal_ops = { | ||
| .get_temp = cxgb4_thermal_get_temp, | ||
| .get_trip_type = cxgb4_thermal_get_trip_type, | ||
| .get_trip_temp = cxgb4_thermal_get_trip_temp, | ||
| }; | ||
|
|
||
| int cxgb4_thermal_init(struct adapter *adap) | ||
| { | ||
| struct ch_thermal *ch_thermal = &adap->ch_thermal; | ||
| 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)); | ||
|
|
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| 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 { | ||
| ch_thermal->trip_temp = val * 1000; | ||
| ch_thermal->trip_type = THERMAL_TRIP_CRITICAL; | ||
| } | ||
|
|
||
| ch_thermal->tzdev = thermal_zone_device_register("cxgb4", num_trip, | ||
| 0, 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; | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| int cxgb4_thermal_remove(struct adapter *adap) | ||
| { | ||
| if (adap->ch_thermal.tzdev) | ||
| thermal_zone_device_unregister(adap->ch_thermal.tzdev); | ||
| return 0; | ||
| } |
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