igb_hwmon.c revision 74cfb2e1f296b3f962016adf41b316b8cf7d4ed4
1/******************************************************************************* 2 3 Intel(R) Gigabit Ethernet Linux driver 4 Copyright(c) 2007-2014 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, see <http://www.gnu.org/licenses/>. 17 18 The full GNU General Public License is included in this distribution in 19 the file called "COPYING". 20 21 Contact Information: 22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 25*******************************************************************************/ 26 27#include "igb.h" 28#include "e1000_82575.h" 29#include "e1000_hw.h" 30 31#include <linux/module.h> 32#include <linux/types.h> 33#include <linux/sysfs.h> 34#include <linux/kobject.h> 35#include <linux/device.h> 36#include <linux/netdevice.h> 37#include <linux/hwmon.h> 38#include <linux/pci.h> 39 40#ifdef CONFIG_IGB_HWMON 41static struct i2c_board_info i350_sensor_info = { 42 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), 43}; 44 45/* hwmon callback functions */ 46static ssize_t igb_hwmon_show_location(struct device *dev, 47 struct device_attribute *attr, 48 char *buf) 49{ 50 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 51 dev_attr); 52 return sprintf(buf, "loc%u\n", 53 igb_attr->sensor->location); 54} 55 56static ssize_t igb_hwmon_show_temp(struct device *dev, 57 struct device_attribute *attr, 58 char *buf) 59{ 60 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 61 dev_attr); 62 unsigned int value; 63 64 /* reset the temp field */ 65 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw); 66 67 value = igb_attr->sensor->temp; 68 69 /* display millidegree */ 70 value *= 1000; 71 72 return sprintf(buf, "%u\n", value); 73} 74 75static ssize_t igb_hwmon_show_cautionthresh(struct device *dev, 76 struct device_attribute *attr, 77 char *buf) 78{ 79 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 80 dev_attr); 81 unsigned int value = igb_attr->sensor->caution_thresh; 82 83 /* display millidegree */ 84 value *= 1000; 85 86 return sprintf(buf, "%u\n", value); 87} 88 89static ssize_t igb_hwmon_show_maxopthresh(struct device *dev, 90 struct device_attribute *attr, 91 char *buf) 92{ 93 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 94 dev_attr); 95 unsigned int value = igb_attr->sensor->max_op_thresh; 96 97 /* display millidegree */ 98 value *= 1000; 99 100 return sprintf(buf, "%u\n", value); 101} 102 103/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 104 * @ adapter: pointer to the adapter structure 105 * @ offset: offset in the eeprom sensor data table 106 * @ type: type of sensor data to display 107 * 108 * For each file we want in hwmon's sysfs interface we need a device_attribute 109 * This is included in our hwmon_attr struct that contains the references to 110 * the data structures we need to get the data to display. 111 */ 112static int igb_add_hwmon_attr(struct igb_adapter *adapter, 113 unsigned int offset, int type) 114{ 115 int rc; 116 unsigned int n_attr; 117 struct hwmon_attr *igb_attr; 118 119 n_attr = adapter->igb_hwmon_buff->n_hwmon; 120 igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr]; 121 122 switch (type) { 123 case IGB_HWMON_TYPE_LOC: 124 igb_attr->dev_attr.show = igb_hwmon_show_location; 125 snprintf(igb_attr->name, sizeof(igb_attr->name), 126 "temp%u_label", offset + 1); 127 break; 128 case IGB_HWMON_TYPE_TEMP: 129 igb_attr->dev_attr.show = igb_hwmon_show_temp; 130 snprintf(igb_attr->name, sizeof(igb_attr->name), 131 "temp%u_input", offset + 1); 132 break; 133 case IGB_HWMON_TYPE_CAUTION: 134 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh; 135 snprintf(igb_attr->name, sizeof(igb_attr->name), 136 "temp%u_max", offset + 1); 137 break; 138 case IGB_HWMON_TYPE_MAX: 139 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh; 140 snprintf(igb_attr->name, sizeof(igb_attr->name), 141 "temp%u_crit", offset + 1); 142 break; 143 default: 144 rc = -EPERM; 145 return rc; 146 } 147 148 /* These always the same regardless of type */ 149 igb_attr->sensor = 150 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 151 igb_attr->hw = &adapter->hw; 152 igb_attr->dev_attr.store = NULL; 153 igb_attr->dev_attr.attr.mode = S_IRUGO; 154 igb_attr->dev_attr.attr.name = igb_attr->name; 155 sysfs_attr_init(&igb_attr->dev_attr.attr); 156 157 adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr; 158 159 ++adapter->igb_hwmon_buff->n_hwmon; 160 161 return 0; 162} 163 164static void igb_sysfs_del_adapter(struct igb_adapter *adapter) 165{ 166} 167 168/* called from igb_main.c */ 169void igb_sysfs_exit(struct igb_adapter *adapter) 170{ 171 igb_sysfs_del_adapter(adapter); 172} 173 174/* called from igb_main.c */ 175int igb_sysfs_init(struct igb_adapter *adapter) 176{ 177 struct hwmon_buff *igb_hwmon; 178 struct i2c_client *client; 179 struct device *hwmon_dev; 180 unsigned int i; 181 int rc = 0; 182 183 /* If this method isn't defined we don't support thermals */ 184 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) 185 goto exit; 186 187 /* Don't create thermal hwmon interface if no sensors present */ 188 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); 189 if (rc) 190 goto exit; 191 192 igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon), 193 GFP_KERNEL); 194 if (!igb_hwmon) { 195 rc = -ENOMEM; 196 goto exit; 197 } 198 adapter->igb_hwmon_buff = igb_hwmon; 199 200 for (i = 0; i < E1000_MAX_SENSORS; i++) { 201 202 /* Only create hwmon sysfs entries for sensors that have 203 * meaningful data. 204 */ 205 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 206 continue; 207 208 /* Bail if any hwmon attr struct fails to initialize */ 209 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); 210 if (rc) 211 goto exit; 212 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); 213 if (rc) 214 goto exit; 215 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); 216 if (rc) 217 goto exit; 218 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); 219 if (rc) 220 goto exit; 221 } 222 223 /* init i2c_client */ 224 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); 225 if (client == NULL) { 226 dev_info(&adapter->pdev->dev, 227 "Failed to create new i2c device.\n"); 228 rc = -ENODEV; 229 goto exit; 230 } 231 adapter->i2c_client = client; 232 233 igb_hwmon->groups[0] = &igb_hwmon->group; 234 igb_hwmon->group.attrs = igb_hwmon->attrs; 235 236 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 237 client->name, 238 igb_hwmon, 239 igb_hwmon->groups); 240 if (IS_ERR(hwmon_dev)) { 241 rc = PTR_ERR(hwmon_dev); 242 goto err; 243 } 244 245 goto exit; 246 247err: 248 igb_sysfs_del_adapter(adapter); 249exit: 250 return rc; 251} 252#endif 253