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 42 static struct i2c_board_info i350_sensor_info = { 43 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), 44 }; 45 46 /* hwmon callback functions */ 47 static 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 57 static 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 76 static 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 90 static 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 */ 113 static int igb_add_hwmon_attr(struct igb_adapter *adapter, 114 unsigned int offset, int type) 115 { 116 int rc; 117 unsigned int n_attr; 118 struct hwmon_attr *igb_attr; 119 120 n_attr = adapter->igb_hwmon_buff.n_hwmon; 121 igb_attr = &adapter->igb_hwmon_buff.hwmon_list[n_attr]; 122 123 switch (type) { 124 case IGB_HWMON_TYPE_LOC: 125 igb_attr->dev_attr.show = igb_hwmon_show_location; 126 snprintf(igb_attr->name, sizeof(igb_attr->name), 127 "temp%u_label", offset); 128 break; 129 case IGB_HWMON_TYPE_TEMP: 130 igb_attr->dev_attr.show = igb_hwmon_show_temp; 131 snprintf(igb_attr->name, sizeof(igb_attr->name), 132 "temp%u_input", offset); 133 break; 134 case IGB_HWMON_TYPE_CAUTION: 135 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh; 136 snprintf(igb_attr->name, sizeof(igb_attr->name), 137 "temp%u_max", offset); 138 break; 139 case IGB_HWMON_TYPE_MAX: 140 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh; 141 snprintf(igb_attr->name, sizeof(igb_attr->name), 142 "temp%u_crit", offset); 143 break; 144 default: 145 rc = -EPERM; 146 return rc; 147 } 148 149 /* These always the same regardless of type */ 150 igb_attr->sensor = 151 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 152 igb_attr->hw = &adapter->hw; 153 igb_attr->dev_attr.store = NULL; 154 igb_attr->dev_attr.attr.mode = S_IRUGO; 155 igb_attr->dev_attr.attr.name = igb_attr->name; 156 sysfs_attr_init(&igb_attr->dev_attr.attr); 157 rc = device_create_file(&adapter->pdev->dev, 158 &igb_attr->dev_attr); 159 if (rc == 0) 160 ++adapter->igb_hwmon_buff.n_hwmon; 161 162 return rc; 163 } 164 165 static void igb_sysfs_del_adapter(struct igb_adapter *adapter) 166 { 167 int i; 168 169 if (adapter == NULL) 170 return; 171 172 for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) { 173 device_remove_file(&adapter->pdev->dev, 174 &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr); 175 } 176 177 kfree(adapter->igb_hwmon_buff.hwmon_list); 178 179 if (adapter->igb_hwmon_buff.device) 180 hwmon_device_unregister(adapter->igb_hwmon_buff.device); 181 } 182 183 /* called from igb_main.c */ 184 void igb_sysfs_exit(struct igb_adapter *adapter) 185 { 186 igb_sysfs_del_adapter(adapter); 187 } 188 189 /* called from igb_main.c */ 190 int igb_sysfs_init(struct igb_adapter *adapter) 191 { 192 struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff; 193 unsigned int i; 194 int n_attrs; 195 int rc = 0; 196 struct i2c_client *client = NULL; 197 198 /* If this method isn't defined we don't support thermals */ 199 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) 200 goto exit; 201 202 /* Don't create thermal hwmon interface if no sensors present */ 203 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); 204 if (rc) 205 goto exit; 206 207 /* init i2c_client */ 208 client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); 209 if (client == NULL) { 210 dev_info(&adapter->pdev->dev, 211 "Failed to create new i2c device..\n"); 212 goto exit; 213 } 214 adapter->i2c_client = client; 215 216 /* Allocation space for max attributes 217 * max num sensors * values (loc, temp, max, caution) 218 */ 219 n_attrs = E1000_MAX_SENSORS * 4; 220 igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), 221 GFP_KERNEL); 222 if (!igb_hwmon->hwmon_list) { 223 rc = -ENOMEM; 224 goto err; 225 } 226 227 igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev); 228 if (IS_ERR(igb_hwmon->device)) { 229 rc = PTR_ERR(igb_hwmon->device); 230 goto err; 231 } 232 233 for (i = 0; i < E1000_MAX_SENSORS; i++) { 234 235 /* Only create hwmon sysfs entries for sensors that have 236 * meaningful data. 237 */ 238 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 239 continue; 240 241 /* Bail if any hwmon attr struct fails to initialize */ 242 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); 243 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); 244 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); 245 rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); 246 if (rc) 247 goto err; 248 } 249 250 goto exit; 251 252 err: 253 igb_sysfs_del_adapter(adapter); 254 exit: 255 return rc; 256 } 257 #endif 258