1 /* 2 * Copyright (C) 2017 Chelsio Communications. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * The full GNU General Public License is included in this distribution in 14 * the file called "COPYING". 15 * 16 * Written by: Ganesh Goudar (ganeshgr@chelsio.com) 17 */ 18 19 #include "cxgb4.h" 20 21 #define CXGB4_NUM_TRIPS 1 22 23 static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev, 24 int *temp) 25 { 26 struct adapter *adap = tzdev->devdata; 27 u32 param, val; 28 int ret; 29 30 param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | 31 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) | 32 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP)); 33 34 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, 35 ¶m, &val); 36 if (ret < 0 || val == 0) 37 return -1; 38 39 *temp = val * 1000; 40 return 0; 41 } 42 43 static int cxgb4_thermal_get_trip_type(struct thermal_zone_device *tzdev, 44 int trip, enum thermal_trip_type *type) 45 { 46 struct adapter *adap = tzdev->devdata; 47 48 if (!adap->ch_thermal.trip_temp) 49 return -EINVAL; 50 51 *type = adap->ch_thermal.trip_type; 52 return 0; 53 } 54 55 static int cxgb4_thermal_get_trip_temp(struct thermal_zone_device *tzdev, 56 int trip, int *temp) 57 { 58 struct adapter *adap = tzdev->devdata; 59 60 if (!adap->ch_thermal.trip_temp) 61 return -EINVAL; 62 63 *temp = adap->ch_thermal.trip_temp; 64 return 0; 65 } 66 67 static struct thermal_zone_device_ops cxgb4_thermal_ops = { 68 .get_temp = cxgb4_thermal_get_temp, 69 .get_trip_type = cxgb4_thermal_get_trip_type, 70 .get_trip_temp = cxgb4_thermal_get_trip_temp, 71 }; 72 73 int cxgb4_thermal_init(struct adapter *adap) 74 { 75 struct ch_thermal *ch_thermal = &adap->ch_thermal; 76 int num_trip = CXGB4_NUM_TRIPS; 77 u32 param, val; 78 int ret; 79 80 /* on older firmwares we may not get the trip temperature, 81 * set the num of trips to 0. 82 */ 83 param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | 84 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) | 85 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH)); 86 87 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, 88 ¶m, &val); 89 if (ret < 0) { 90 num_trip = 0; /* could not get trip temperature */ 91 } else { 92 ch_thermal->trip_temp = val * 1000; 93 ch_thermal->trip_type = THERMAL_TRIP_CRITICAL; 94 } 95 96 ch_thermal->tzdev = thermal_zone_device_register("cxgb4", num_trip, 97 0, adap, 98 &cxgb4_thermal_ops, 99 NULL, 0, 0); 100 if (IS_ERR(ch_thermal->tzdev)) { 101 ret = PTR_ERR(ch_thermal->tzdev); 102 dev_err(adap->pdev_dev, "Failed to register thermal zone\n"); 103 ch_thermal->tzdev = NULL; 104 return ret; 105 } 106 return 0; 107 } 108 109 int cxgb4_thermal_remove(struct adapter *adap) 110 { 111 if (adap->ch_thermal.tzdev) 112 thermal_zone_device_unregister(adap->ch_thermal.tzdev); 113 return 0; 114 } 115