1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Chelsio Communications. All rights reserved. 4 * 5 * Written by: Ganesh Goudar (ganeshgr@chelsio.com) 6 */ 7 8 #include "cxgb4.h" 9 10 #define CXGB4_NUM_TRIPS 1 11 12 static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev, 13 int *temp) 14 { 15 struct adapter *adap = thermal_zone_device_priv(tzdev); 16 u32 param, val; 17 int ret; 18 19 param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | 20 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) | 21 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP)); 22 23 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, 24 ¶m, &val); 25 if (ret < 0 || val == 0) 26 return -1; 27 28 *temp = val * 1000; 29 return 0; 30 } 31 32 static struct thermal_zone_device_ops cxgb4_thermal_ops = { 33 .get_temp = cxgb4_thermal_get_temp, 34 }; 35 36 static struct thermal_trip trip = { .type = THERMAL_TRIP_CRITICAL } ; 37 38 int cxgb4_thermal_init(struct adapter *adap) 39 { 40 struct ch_thermal *ch_thermal = &adap->ch_thermal; 41 char ch_tz_name[THERMAL_NAME_LENGTH]; 42 int num_trip = CXGB4_NUM_TRIPS; 43 u32 param, val; 44 int ret; 45 46 /* on older firmwares we may not get the trip temperature, 47 * set the num of trips to 0. 48 */ 49 param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | 50 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) | 51 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH)); 52 53 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, 54 ¶m, &val); 55 if (ret < 0) { 56 num_trip = 0; /* could not get trip temperature */ 57 } else { 58 trip.temperature = val * 1000; 59 } 60 61 snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name); 62 ch_thermal->tzdev = thermal_zone_device_register_with_trips(ch_tz_name, &trip, num_trip, 63 0, adap, 64 &cxgb4_thermal_ops, 65 NULL, 0, 0); 66 if (IS_ERR(ch_thermal->tzdev)) { 67 ret = PTR_ERR(ch_thermal->tzdev); 68 dev_err(adap->pdev_dev, "Failed to register thermal zone\n"); 69 ch_thermal->tzdev = NULL; 70 return ret; 71 } 72 73 ret = thermal_zone_device_enable(ch_thermal->tzdev); 74 if (ret) { 75 dev_err(adap->pdev_dev, "Failed to enable thermal zone\n"); 76 thermal_zone_device_unregister(adap->ch_thermal.tzdev); 77 return ret; 78 } 79 80 return 0; 81 } 82 83 int cxgb4_thermal_remove(struct adapter *adap) 84 { 85 if (adap->ch_thermal.tzdev) { 86 thermal_zone_device_unregister(adap->ch_thermal.tzdev); 87 adap->ch_thermal.tzdev = NULL; 88 } 89 return 0; 90 } 91