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 = tzdev->devdata; 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 int cxgb4_thermal_get_trip_type(struct thermal_zone_device *tzdev, 33 int trip, enum thermal_trip_type *type) 34 { 35 struct adapter *adap = tzdev->devdata; 36 37 if (!adap->ch_thermal.trip_temp) 38 return -EINVAL; 39 40 *type = adap->ch_thermal.trip_type; 41 return 0; 42 } 43 44 static int cxgb4_thermal_get_trip_temp(struct thermal_zone_device *tzdev, 45 int trip, int *temp) 46 { 47 struct adapter *adap = tzdev->devdata; 48 49 if (!adap->ch_thermal.trip_temp) 50 return -EINVAL; 51 52 *temp = adap->ch_thermal.trip_temp; 53 return 0; 54 } 55 56 static struct thermal_zone_device_ops cxgb4_thermal_ops = { 57 .get_temp = cxgb4_thermal_get_temp, 58 .get_trip_type = cxgb4_thermal_get_trip_type, 59 .get_trip_temp = cxgb4_thermal_get_trip_temp, 60 }; 61 62 int cxgb4_thermal_init(struct adapter *adap) 63 { 64 struct ch_thermal *ch_thermal = &adap->ch_thermal; 65 char ch_tz_name[THERMAL_NAME_LENGTH]; 66 int num_trip = CXGB4_NUM_TRIPS; 67 u32 param, val; 68 int ret; 69 70 /* on older firmwares we may not get the trip temperature, 71 * set the num of trips to 0. 72 */ 73 param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | 74 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) | 75 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH)); 76 77 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, 78 ¶m, &val); 79 if (ret < 0) { 80 num_trip = 0; /* could not get trip temperature */ 81 } else { 82 ch_thermal->trip_temp = val * 1000; 83 ch_thermal->trip_type = THERMAL_TRIP_CRITICAL; 84 } 85 86 snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name); 87 ch_thermal->tzdev = thermal_zone_device_register(ch_tz_name, num_trip, 88 0, adap, 89 &cxgb4_thermal_ops, 90 NULL, 0, 0); 91 if (IS_ERR(ch_thermal->tzdev)) { 92 ret = PTR_ERR(ch_thermal->tzdev); 93 dev_err(adap->pdev_dev, "Failed to register thermal zone\n"); 94 ch_thermal->tzdev = NULL; 95 return ret; 96 } 97 98 ret = thermal_zone_device_enable(ch_thermal->tzdev); 99 if (ret) { 100 dev_err(adap->pdev_dev, "Failed to enable thermal zone\n"); 101 thermal_zone_device_unregister(adap->ch_thermal.tzdev); 102 return ret; 103 } 104 105 return 0; 106 } 107 108 int cxgb4_thermal_remove(struct adapter *adap) 109 { 110 if (adap->ch_thermal.tzdev) { 111 thermal_zone_device_unregister(adap->ch_thermal.tzdev); 112 adap->ch_thermal.tzdev = NULL; 113 } 114 return 0; 115 } 116