1 /* Intel(R) Gigabit Ethernet Linux driver 2 * Copyright(c) 2007-2014 Intel Corporation. 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 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, see <http://www.gnu.org/licenses/>. 15 * 16 * The full GNU General Public License is included in this distribution in 17 * the file called "COPYING". 18 * 19 * Contact Information: 20 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 21 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 22 */ 23 24 #include "igb.h" 25 #include "e1000_82575.h" 26 #include "e1000_hw.h" 27 28 #include <linux/module.h> 29 #include <linux/types.h> 30 #include <linux/sysfs.h> 31 #include <linux/kobject.h> 32 #include <linux/device.h> 33 #include <linux/netdevice.h> 34 #include <linux/hwmon.h> 35 #include <linux/pci.h> 36 37 #ifdef CONFIG_IGB_HWMON 38 static struct i2c_board_info i350_sensor_info = { 39 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), 40 }; 41 42 /* hwmon callback functions */ 43 static ssize_t igb_hwmon_show_location(struct device *dev, 44 struct device_attribute *attr, 45 char *buf) 46 { 47 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 48 dev_attr); 49 return sprintf(buf, "loc%u\n", 50 igb_attr->sensor->location); 51 } 52 53 static ssize_t igb_hwmon_show_temp(struct device *dev, 54 struct device_attribute *attr, 55 char *buf) 56 { 57 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 58 dev_attr); 59 unsigned int value; 60 61 /* reset the temp field */ 62 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw); 63 64 value = igb_attr->sensor->temp; 65 66 /* display millidegree */ 67 value *= 1000; 68 69 return sprintf(buf, "%u\n", value); 70 } 71 72 static ssize_t igb_hwmon_show_cautionthresh(struct device *dev, 73 struct device_attribute *attr, 74 char *buf) 75 { 76 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 77 dev_attr); 78 unsigned int value = igb_attr->sensor->caution_thresh; 79 80 /* display millidegree */ 81 value *= 1000; 82 83 return sprintf(buf, "%u\n", value); 84 } 85 86 static ssize_t igb_hwmon_show_maxopthresh(struct device *dev, 87 struct device_attribute *attr, 88 char *buf) 89 { 90 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 91 dev_attr); 92 unsigned int value = igb_attr->sensor->max_op_thresh; 93 94 /* display millidegree */ 95 value *= 1000; 96 97 return sprintf(buf, "%u\n", value); 98 } 99 100 /* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 101 * @ adapter: pointer to the adapter structure 102 * @ offset: offset in the eeprom sensor data table 103 * @ type: type of sensor data to display 104 * 105 * For each file we want in hwmon's sysfs interface we need a device_attribute 106 * This is included in our hwmon_attr struct that contains the references to 107 * the data structures we need to get the data to display. 108 */ 109 static int igb_add_hwmon_attr(struct igb_adapter *adapter, 110 unsigned int offset, int type) 111 { 112 int rc; 113 unsigned int n_attr; 114 struct hwmon_attr *igb_attr; 115 116 n_attr = adapter->igb_hwmon_buff->n_hwmon; 117 igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr]; 118 119 switch (type) { 120 case IGB_HWMON_TYPE_LOC: 121 igb_attr->dev_attr.show = igb_hwmon_show_location; 122 snprintf(igb_attr->name, sizeof(igb_attr->name), 123 "temp%u_label", offset + 1); 124 break; 125 case IGB_HWMON_TYPE_TEMP: 126 igb_attr->dev_attr.show = igb_hwmon_show_temp; 127 snprintf(igb_attr->name, sizeof(igb_attr->name), 128 "temp%u_input", offset + 1); 129 break; 130 case IGB_HWMON_TYPE_CAUTION: 131 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh; 132 snprintf(igb_attr->name, sizeof(igb_attr->name), 133 "temp%u_max", offset + 1); 134 break; 135 case IGB_HWMON_TYPE_MAX: 136 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh; 137 snprintf(igb_attr->name, sizeof(igb_attr->name), 138 "temp%u_crit", offset + 1); 139 break; 140 default: 141 rc = -EPERM; 142 return rc; 143 } 144 145 /* These always the same regardless of type */ 146 igb_attr->sensor = 147 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 148 igb_attr->hw = &adapter->hw; 149 igb_attr->dev_attr.store = NULL; 150 igb_attr->dev_attr.attr.mode = S_IRUGO; 151 igb_attr->dev_attr.attr.name = igb_attr->name; 152 sysfs_attr_init(&igb_attr->dev_attr.attr); 153 154 adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr; 155 156 ++adapter->igb_hwmon_buff->n_hwmon; 157 158 return 0; 159 } 160 161 static void igb_sysfs_del_adapter(struct igb_adapter *adapter) 162 { 163 } 164 165 /* called from igb_main.c */ 166 void igb_sysfs_exit(struct igb_adapter *adapter) 167 { 168 igb_sysfs_del_adapter(adapter); 169 } 170 171 /* called from igb_main.c */ 172 int igb_sysfs_init(struct igb_adapter *adapter) 173 { 174 struct hwmon_buff *igb_hwmon; 175 struct i2c_client *client; 176 struct device *hwmon_dev; 177 unsigned int i; 178 int rc = 0; 179 180 /* If this method isn't defined we don't support thermals */ 181 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) 182 goto exit; 183 184 /* Don't create thermal hwmon interface if no sensors present */ 185 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); 186 if (rc) 187 goto exit; 188 189 igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon), 190 GFP_KERNEL); 191 if (!igb_hwmon) { 192 rc = -ENOMEM; 193 goto exit; 194 } 195 adapter->igb_hwmon_buff = igb_hwmon; 196 197 for (i = 0; i < E1000_MAX_SENSORS; i++) { 198 199 /* Only create hwmon sysfs entries for sensors that have 200 * meaningful data. 201 */ 202 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 203 continue; 204 205 /* Bail if any hwmon attr struct fails to initialize */ 206 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); 207 if (rc) 208 goto exit; 209 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); 210 if (rc) 211 goto exit; 212 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); 213 if (rc) 214 goto exit; 215 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); 216 if (rc) 217 goto exit; 218 } 219 220 /* init i2c_client */ 221 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); 222 if (client == NULL) { 223 dev_info(&adapter->pdev->dev, 224 "Failed to create new i2c device.\n"); 225 rc = -ENODEV; 226 goto exit; 227 } 228 adapter->i2c_client = client; 229 230 igb_hwmon->groups[0] = &igb_hwmon->group; 231 igb_hwmon->group.attrs = igb_hwmon->attrs; 232 233 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 234 client->name, 235 igb_hwmon, 236 igb_hwmon->groups); 237 if (IS_ERR(hwmon_dev)) { 238 rc = PTR_ERR(hwmon_dev); 239 goto err; 240 } 241 242 goto exit; 243 244 err: 245 igb_sysfs_del_adapter(adapter); 246 exit: 247 return rc; 248 } 249 #endif 250