igb_hwmon.c revision 05ec29e8fa9b6ec8d4ad5d2f6d5fc5467c7970bc
1/******************************************************************************* 2 3 Intel(R) Gigabit Ethernet Linux driver 4 Copyright(c) 2007-2013 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, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 26*******************************************************************************/ 27 28#include "igb.h" 29#include "e1000_82575.h" 30#include "e1000_hw.h" 31 32#include <linux/module.h> 33#include <linux/types.h> 34#include <linux/sysfs.h> 35#include <linux/kobject.h> 36#include <linux/device.h> 37#include <linux/netdevice.h> 38#include <linux/hwmon.h> 39#include <linux/pci.h> 40 41#ifdef CONFIG_IGB_HWMON 42static struct i2c_board_info i350_sensor_info = { 43 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), 44}; 45 46/* hwmon callback functions */ 47static ssize_t igb_hwmon_show_location(struct device *dev, 48 struct device_attribute *attr, 49 char *buf) 50{ 51 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 52 dev_attr); 53 return sprintf(buf, "loc%u\n", 54 igb_attr->sensor->location); 55} 56 57static ssize_t igb_hwmon_show_temp(struct device *dev, 58 struct device_attribute *attr, 59 char *buf) 60{ 61 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 62 dev_attr); 63 unsigned int value; 64 65 /* reset the temp field */ 66 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw); 67 68 value = igb_attr->sensor->temp; 69 70 /* display millidegree */ 71 value *= 1000; 72 73 return sprintf(buf, "%u\n", value); 74} 75 76static ssize_t igb_hwmon_show_cautionthresh(struct device *dev, 77 struct device_attribute *attr, 78 char *buf) 79{ 80 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 81 dev_attr); 82 unsigned int value = igb_attr->sensor->caution_thresh; 83 84 /* display millidegree */ 85 value *= 1000; 86 87 return sprintf(buf, "%u\n", value); 88} 89 90static ssize_t igb_hwmon_show_maxopthresh(struct device *dev, 91 struct device_attribute *attr, 92 char *buf) 93{ 94 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr, 95 dev_attr); 96 unsigned int value = igb_attr->sensor->max_op_thresh; 97 98 /* display millidegree */ 99 value *= 1000; 100 101 return sprintf(buf, "%u\n", value); 102} 103 104/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 105 * @ adapter: pointer to the adapter structure 106 * @ offset: offset in the eeprom sensor data table 107 * @ type: type of sensor data to display 108 * 109 * For each file we want in hwmon's sysfs interface we need a device_attribute 110 * This is included in our hwmon_attr struct that contains the references to 111 * the data structures we need to get the data to display. 112 */ 113static int igb_add_hwmon_attr(struct igb_adapter *adapter, 114 unsigned int offset, int type) { 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); 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); 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); 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); 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 rc = device_create_file(&adapter->pdev->dev, 157 &igb_attr->dev_attr); 158 if (rc == 0) 159 ++adapter->igb_hwmon_buff.n_hwmon; 160 161 return rc; 162} 163 164static void igb_sysfs_del_adapter(struct igb_adapter *adapter) 165{ 166 int i; 167 168 if (adapter == NULL) 169 return; 170 171 for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) { 172 device_remove_file(&adapter->pdev->dev, 173 &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr); 174 } 175 176 kfree(adapter->igb_hwmon_buff.hwmon_list); 177 178 if (adapter->igb_hwmon_buff.device) 179 hwmon_device_unregister(adapter->igb_hwmon_buff.device); 180} 181 182/* called from igb_main.c */ 183void igb_sysfs_exit(struct igb_adapter *adapter) 184{ 185 igb_sysfs_del_adapter(adapter); 186} 187 188/* called from igb_main.c */ 189int igb_sysfs_init(struct igb_adapter *adapter) 190{ 191 struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff; 192 unsigned int i; 193 int n_attrs; 194 int rc = 0; 195 struct i2c_client *client = NULL; 196 197 /* If this method isn't defined we don't support thermals */ 198 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) 199 goto exit; 200 201 /* Don't create thermal hwmon interface if no sensors present */ 202 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); 203 if (rc) 204 goto exit; 205 206 /* init i2c_client */ 207 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); 208 if (client == NULL) { 209 dev_info(&adapter->pdev->dev, 210 "Failed to create new i2c device..\n"); 211 goto exit; 212 } 213 adapter->i2c_client = client; 214 215 /* Allocation space for max attributes 216 * max num sensors * values (loc, temp, max, caution) 217 */ 218 n_attrs = E1000_MAX_SENSORS * 4; 219 igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), 220 GFP_KERNEL); 221 if (!igb_hwmon->hwmon_list) { 222 rc = -ENOMEM; 223 goto err; 224 } 225 226 igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev); 227 if (IS_ERR(igb_hwmon->device)) { 228 rc = PTR_ERR(igb_hwmon->device); 229 goto err; 230 } 231 232 for (i = 0; i < E1000_MAX_SENSORS; i++) { 233 234 /* Only create hwmon sysfs entries for sensors that have 235 * meaningful data. 236 */ 237 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 238 continue; 239 240 /* Bail if any hwmon attr struct fails to initialize */ 241 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); 242 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); 243 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); 244 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); 245 if (rc) 246 goto err; 247 } 248 249 goto exit; 250 251err: 252 igb_sysfs_del_adapter(adapter); 253exit: 254 return rc; 255} 256#endif 257