1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 1999 - 2018 Intel Corporation. */ 3 4 #include "ixgbe.h" 5 #include "ixgbe_common.h" 6 #include "ixgbe_type.h" 7 8 #include <linux/module.h> 9 #include <linux/types.h> 10 #include <linux/sysfs.h> 11 #include <linux/kobject.h> 12 #include <linux/device.h> 13 #include <linux/netdevice.h> 14 #include <linux/hwmon.h> 15 16 /* hwmon callback functions */ 17 static ssize_t ixgbe_hwmon_show_location(struct device *dev, 18 struct device_attribute *attr, 19 char *buf) 20 { 21 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 22 dev_attr); 23 return sprintf(buf, "loc%u\n", 24 ixgbe_attr->sensor->location); 25 } 26 27 static ssize_t ixgbe_hwmon_show_temp(struct device *dev, 28 struct device_attribute *attr, 29 char *buf) 30 { 31 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 32 dev_attr); 33 unsigned int value; 34 35 /* reset the temp field */ 36 ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw); 37 38 value = ixgbe_attr->sensor->temp; 39 40 /* display millidegree */ 41 value *= 1000; 42 43 return sprintf(buf, "%u\n", value); 44 } 45 46 static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev, 47 struct device_attribute *attr, 48 char *buf) 49 { 50 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 51 dev_attr); 52 unsigned int value = ixgbe_attr->sensor->caution_thresh; 53 54 /* display millidegree */ 55 value *= 1000; 56 57 return sprintf(buf, "%u\n", value); 58 } 59 60 static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev, 61 struct device_attribute *attr, 62 char *buf) 63 { 64 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 65 dev_attr); 66 unsigned int value = ixgbe_attr->sensor->max_op_thresh; 67 68 /* display millidegree */ 69 value *= 1000; 70 71 return sprintf(buf, "%u\n", value); 72 } 73 74 /** 75 * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 76 * @adapter: pointer to the adapter structure 77 * @offset: offset in the eeprom sensor data table 78 * @type: type of sensor data to display 79 * 80 * For each file we want in hwmon's sysfs interface we need a device_attribute 81 * This is included in our hwmon_attr struct that contains the references to 82 * the data structures we need to get the data to display. 83 */ 84 static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, 85 unsigned int offset, int type) { 86 int rc; 87 unsigned int n_attr; 88 struct hwmon_attr *ixgbe_attr; 89 90 n_attr = adapter->ixgbe_hwmon_buff->n_hwmon; 91 ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr]; 92 93 switch (type) { 94 case IXGBE_HWMON_TYPE_LOC: 95 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location; 96 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 97 "temp%u_label", offset + 1); 98 break; 99 case IXGBE_HWMON_TYPE_TEMP: 100 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp; 101 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 102 "temp%u_input", offset + 1); 103 break; 104 case IXGBE_HWMON_TYPE_CAUTION: 105 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh; 106 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 107 "temp%u_max", offset + 1); 108 break; 109 case IXGBE_HWMON_TYPE_MAX: 110 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh; 111 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 112 "temp%u_crit", offset + 1); 113 break; 114 default: 115 rc = -EPERM; 116 return rc; 117 } 118 119 /* These always the same regardless of type */ 120 ixgbe_attr->sensor = 121 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 122 ixgbe_attr->hw = &adapter->hw; 123 ixgbe_attr->dev_attr.store = NULL; 124 ixgbe_attr->dev_attr.attr.mode = 0444; 125 ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name; 126 sysfs_attr_init(&ixgbe_attr->dev_attr.attr); 127 128 adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr; 129 130 ++adapter->ixgbe_hwmon_buff->n_hwmon; 131 132 return 0; 133 } 134 135 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) 136 { 137 } 138 139 /* called from ixgbe_main.c */ 140 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) 141 { 142 ixgbe_sysfs_del_adapter(adapter); 143 } 144 145 /* called from ixgbe_main.c */ 146 int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) 147 { 148 struct hwmon_buff *ixgbe_hwmon; 149 struct device *hwmon_dev; 150 unsigned int i; 151 int rc = 0; 152 153 /* If this method isn't defined we don't support thermals */ 154 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { 155 goto exit; 156 } 157 158 /* Don't create thermal hwmon interface if no sensors present */ 159 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) 160 goto exit; 161 162 ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon), 163 GFP_KERNEL); 164 if (ixgbe_hwmon == NULL) { 165 rc = -ENOMEM; 166 goto exit; 167 } 168 adapter->ixgbe_hwmon_buff = ixgbe_hwmon; 169 170 for (i = 0; i < IXGBE_MAX_SENSORS; i++) { 171 /* 172 * Only create hwmon sysfs entries for sensors that have 173 * meaningful data for. 174 */ 175 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 176 continue; 177 178 /* Bail if any hwmon attr struct fails to initialize */ 179 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); 180 if (rc) 181 goto exit; 182 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); 183 if (rc) 184 goto exit; 185 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); 186 if (rc) 187 goto exit; 188 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); 189 if (rc) 190 goto exit; 191 } 192 193 ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group; 194 ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs; 195 196 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 197 "ixgbe", 198 ixgbe_hwmon, 199 ixgbe_hwmon->groups); 200 if (IS_ERR(hwmon_dev)) 201 rc = PTR_ERR(hwmon_dev); 202 exit: 203 return rc; 204 } 205 206