1 /******************************************************************************* 2 3 Intel 10 Gigabit PCI Express Linux driver 4 Copyright(c) 1999 - 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 "ixgbe.h" 29 #include "ixgbe_common.h" 30 #include "ixgbe_type.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 40 /* hwmon callback functions */ 41 static ssize_t ixgbe_hwmon_show_location(struct device *dev, 42 struct device_attribute *attr, 43 char *buf) 44 { 45 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 46 dev_attr); 47 return sprintf(buf, "loc%u\n", 48 ixgbe_attr->sensor->location); 49 } 50 51 static ssize_t ixgbe_hwmon_show_temp(struct device *dev, 52 struct device_attribute *attr, 53 char *buf) 54 { 55 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 56 dev_attr); 57 unsigned int value; 58 59 /* reset the temp field */ 60 ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw); 61 62 value = ixgbe_attr->sensor->temp; 63 64 /* display millidegree */ 65 value *= 1000; 66 67 return sprintf(buf, "%u\n", value); 68 } 69 70 static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev, 71 struct device_attribute *attr, 72 char *buf) 73 { 74 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 75 dev_attr); 76 unsigned int value = ixgbe_attr->sensor->caution_thresh; 77 78 /* display millidegree */ 79 value *= 1000; 80 81 return sprintf(buf, "%u\n", value); 82 } 83 84 static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev, 85 struct device_attribute *attr, 86 char *buf) 87 { 88 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 89 dev_attr); 90 unsigned int value = ixgbe_attr->sensor->max_op_thresh; 91 92 /* display millidegree */ 93 value *= 1000; 94 95 return sprintf(buf, "%u\n", value); 96 } 97 98 /** 99 * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file. 100 * @adapter: pointer to the adapter structure 101 * @offset: offset in the eeprom sensor data table 102 * @type: type of sensor data to display 103 * 104 * For each file we want in hwmon's sysfs interface we need a device_attribute 105 * This is included in our hwmon_attr struct that contains the references to 106 * the data structures we need to get the data to display. 107 */ 108 static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, 109 unsigned int offset, int type) { 110 int rc; 111 unsigned int n_attr; 112 struct hwmon_attr *ixgbe_attr; 113 114 n_attr = adapter->ixgbe_hwmon_buff->n_hwmon; 115 ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr]; 116 117 switch (type) { 118 case IXGBE_HWMON_TYPE_LOC: 119 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location; 120 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 121 "temp%u_label", offset + 1); 122 break; 123 case IXGBE_HWMON_TYPE_TEMP: 124 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp; 125 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 126 "temp%u_input", offset + 1); 127 break; 128 case IXGBE_HWMON_TYPE_CAUTION: 129 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh; 130 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 131 "temp%u_max", offset + 1); 132 break; 133 case IXGBE_HWMON_TYPE_MAX: 134 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh; 135 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 136 "temp%u_crit", offset + 1); 137 break; 138 default: 139 rc = -EPERM; 140 return rc; 141 } 142 143 /* These always the same regardless of type */ 144 ixgbe_attr->sensor = 145 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 146 ixgbe_attr->hw = &adapter->hw; 147 ixgbe_attr->dev_attr.store = NULL; 148 ixgbe_attr->dev_attr.attr.mode = S_IRUGO; 149 ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name; 150 sysfs_attr_init(&ixgbe_attr->dev_attr.attr); 151 152 adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr; 153 154 ++adapter->ixgbe_hwmon_buff->n_hwmon; 155 156 return 0; 157 } 158 159 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) 160 { 161 } 162 163 /* called from ixgbe_main.c */ 164 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) 165 { 166 ixgbe_sysfs_del_adapter(adapter); 167 } 168 169 /* called from ixgbe_main.c */ 170 int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) 171 { 172 struct hwmon_buff *ixgbe_hwmon; 173 struct device *hwmon_dev; 174 unsigned int i; 175 int rc = 0; 176 177 /* If this method isn't defined we don't support thermals */ 178 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { 179 goto exit; 180 } 181 182 /* Don't create thermal hwmon interface if no sensors present */ 183 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) 184 goto exit; 185 186 ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon), 187 GFP_KERNEL); 188 if (ixgbe_hwmon == NULL) { 189 rc = -ENOMEM; 190 goto exit; 191 } 192 adapter->ixgbe_hwmon_buff = ixgbe_hwmon; 193 194 for (i = 0; i < IXGBE_MAX_SENSORS; i++) { 195 /* 196 * Only create hwmon sysfs entries for sensors that have 197 * meaningful data for. 198 */ 199 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 200 continue; 201 202 /* Bail if any hwmon attr struct fails to initialize */ 203 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); 204 if (rc) 205 goto exit; 206 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); 207 if (rc) 208 goto exit; 209 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); 210 if (rc) 211 goto exit; 212 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); 213 if (rc) 214 goto exit; 215 } 216 217 ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group; 218 ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs; 219 220 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 221 "ixgbe", 222 ixgbe_hwmon, 223 ixgbe_hwmon->groups); 224 if (IS_ERR(hwmon_dev)) 225 rc = PTR_ERR(hwmon_dev); 226 exit: 227 return rc; 228 } 229 230