1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2007 - 2018 Intel Corporation. */ 3 4 #include "igb.h" 5 #include "e1000_82575.h" 6 #include "e1000_hw.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 #include <linux/pci.h> 16 17 #ifdef CONFIG_IGB_HWMON 18 static struct i2c_board_info i350_sensor_info = { 19 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), 20 }; 21 22 /* hwmon callback functions */ 23 static ssize_t igb_hwmon_show_location(struct device *dev, 24 struct device_attribute *attr, 25 char *buf) 26 { 27 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 28 dev_attr); 29 return sprintf(buf, "loc%u\n", 30 igb_attr->sensor->location); 31 } 32 33 static ssize_t igb_hwmon_show_temp(struct device *dev, 34 struct device_attribute *attr, 35 char *buf) 36 { 37 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 38 dev_attr); 39 unsigned int value; 40 41 /* reset the temp field */ 42 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw); 43 44 value = igb_attr->sensor->temp; 45 46 /* display millidegree */ 47 value *= 1000; 48 49 return sprintf(buf, "%u\n", value); 50 } 51 52 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev, 53 struct device_attribute *attr, 54 char *buf) 55 { 56 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 57 dev_attr); 58 unsigned int value = igb_attr->sensor->caution_thresh; 59 60 /* display millidegree */ 61 value *= 1000; 62 63 return sprintf(buf, "%u\n", value); 64 } 65 66 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev, 67 struct device_attribute *attr, 68 char *buf) 69 { 70 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 71 dev_attr); 72 unsigned int value = igb_attr->sensor->max_op_thresh; 73 74 /* display millidegree */ 75 value *= 1000; 76 77 return sprintf(buf, "%u\n", value); 78 } 79 80 /* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 81 * @ adapter: pointer to the adapter structure 82 * @ offset: offset in the eeprom sensor data table 83 * @ type: type of sensor data to display 84 * 85 * For each file we want in hwmon's sysfs interface we need a device_attribute 86 * This is included in our hwmon_attr struct that contains the references to 87 * the data structures we need to get the data to display. 88 */ 89 static int igb_add_hwmon_attr(struct igb_adapter *adapter, 90 unsigned int offset, int type) 91 { 92 int rc; 93 unsigned int n_attr; 94 struct hwmon_attr *igb_attr; 95 96 n_attr = adapter->igb_hwmon_buff->n_hwmon; 97 igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr]; 98 99 switch (type) { 100 case IGB_HWMON_TYPE_LOC: 101 igb_attr->dev_attr.show = igb_hwmon_show_location; 102 snprintf(igb_attr->name, sizeof(igb_attr->name), 103 "temp%u_label", offset + 1); 104 break; 105 case IGB_HWMON_TYPE_TEMP: 106 igb_attr->dev_attr.show = igb_hwmon_show_temp; 107 snprintf(igb_attr->name, sizeof(igb_attr->name), 108 "temp%u_input", offset + 1); 109 break; 110 case IGB_HWMON_TYPE_CAUTION: 111 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh; 112 snprintf(igb_attr->name, sizeof(igb_attr->name), 113 "temp%u_max", offset + 1); 114 break; 115 case IGB_HWMON_TYPE_MAX: 116 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh; 117 snprintf(igb_attr->name, sizeof(igb_attr->name), 118 "temp%u_crit", offset + 1); 119 break; 120 default: 121 rc = -EPERM; 122 return rc; 123 } 124 125 /* These always the same regardless of type */ 126 igb_attr->sensor = 127 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 128 igb_attr->hw = &adapter->hw; 129 igb_attr->dev_attr.store = NULL; 130 igb_attr->dev_attr.attr.mode = 0444; 131 igb_attr->dev_attr.attr.name = igb_attr->name; 132 sysfs_attr_init(&igb_attr->dev_attr.attr); 133 134 adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr; 135 136 ++adapter->igb_hwmon_buff->n_hwmon; 137 138 return 0; 139 } 140 141 static void igb_sysfs_del_adapter(struct igb_adapter *adapter) 142 { 143 } 144 145 /* called from igb_main.c */ 146 void igb_sysfs_exit(struct igb_adapter *adapter) 147 { 148 igb_sysfs_del_adapter(adapter); 149 } 150 151 /* called from igb_main.c */ 152 int igb_sysfs_init(struct igb_adapter *adapter) 153 { 154 struct hwmon_buff *igb_hwmon; 155 struct i2c_client *client; 156 struct device *hwmon_dev; 157 unsigned int i; 158 int rc = 0; 159 160 /* If this method isn't defined we don't support thermals */ 161 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) 162 goto exit; 163 164 /* Don't create thermal hwmon interface if no sensors present */ 165 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); 166 if (rc) 167 goto exit; 168 169 igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon), 170 GFP_KERNEL); 171 if (!igb_hwmon) { 172 rc = -ENOMEM; 173 goto exit; 174 } 175 adapter->igb_hwmon_buff = igb_hwmon; 176 177 for (i = 0; i < E1000_MAX_SENSORS; i++) { 178 179 /* Only create hwmon sysfs entries for sensors that have 180 * meaningful data. 181 */ 182 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 183 continue; 184 185 /* Bail if any hwmon attr struct fails to initialize */ 186 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); 187 if (rc) 188 goto exit; 189 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); 190 if (rc) 191 goto exit; 192 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); 193 if (rc) 194 goto exit; 195 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); 196 if (rc) 197 goto exit; 198 } 199 200 /* init i2c_client */ 201 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); 202 if (client == NULL) { 203 dev_info(&adapter->pdev->dev, 204 "Failed to create new i2c device.\n"); 205 rc = -ENODEV; 206 goto exit; 207 } 208 adapter->i2c_client = client; 209 210 igb_hwmon->groups[0] = &igb_hwmon->group; 211 igb_hwmon->group.attrs = igb_hwmon->attrs; 212 213 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 214 client->name, 215 igb_hwmon, 216 igb_hwmon->groups); 217 if (IS_ERR(hwmon_dev)) { 218 rc = PTR_ERR(hwmon_dev); 219 goto err; 220 } 221 222 goto exit; 223 224 err: 225 igb_sysfs_del_adapter(adapter); 226 exit: 227 return rc; 228 } 229 #endif 230