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 Linux NICS <linux.nics@intel.com> 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 27*******************************************************************************/ 28 29#include "ixgbe.h" 30#include "ixgbe_common.h" 31#include "ixgbe_type.h" 32 33#include <linux/module.h> 34#include <linux/types.h> 35#include <linux/sysfs.h> 36#include <linux/kobject.h> 37#include <linux/device.h> 38#include <linux/netdevice.h> 39#include <linux/hwmon.h> 40 41/* hwmon callback functions */ 42static ssize_t ixgbe_hwmon_show_location(struct device *dev, 43 struct device_attribute *attr, 44 char *buf) 45{ 46 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 47 dev_attr); 48 return sprintf(buf, "loc%u\n", 49 ixgbe_attr->sensor->location); 50} 51 52static ssize_t ixgbe_hwmon_show_temp(struct device *dev, 53 struct device_attribute *attr, 54 char *buf) 55{ 56 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 57 dev_attr); 58 unsigned int value; 59 60 /* reset the temp field */ 61 ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw); 62 63 value = ixgbe_attr->sensor->temp; 64 65 /* display millidegree */ 66 value *= 1000; 67 68 return sprintf(buf, "%u\n", value); 69} 70 71static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev, 72 struct device_attribute *attr, 73 char *buf) 74{ 75 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 76 dev_attr); 77 unsigned int value = ixgbe_attr->sensor->caution_thresh; 78 79 /* display millidegree */ 80 value *= 1000; 81 82 return sprintf(buf, "%u\n", value); 83} 84 85static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev, 86 struct device_attribute *attr, 87 char *buf) 88{ 89 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr, 90 dev_attr); 91 unsigned int value = ixgbe_attr->sensor->max_op_thresh; 92 93 /* display millidegree */ 94 value *= 1000; 95 96 return sprintf(buf, "%u\n", value); 97} 98 99/** 100 * ixgbe_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 */ 109static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, 110 unsigned int offset, int type) { 111 int rc; 112 unsigned int n_attr; 113 struct hwmon_attr *ixgbe_attr; 114 115 n_attr = adapter->ixgbe_hwmon_buff->n_hwmon; 116 ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr]; 117 118 switch (type) { 119 case IXGBE_HWMON_TYPE_LOC: 120 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location; 121 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 122 "temp%u_label", offset + 1); 123 break; 124 case IXGBE_HWMON_TYPE_TEMP: 125 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp; 126 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 127 "temp%u_input", offset + 1); 128 break; 129 case IXGBE_HWMON_TYPE_CAUTION: 130 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh; 131 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 132 "temp%u_max", offset + 1); 133 break; 134 case IXGBE_HWMON_TYPE_MAX: 135 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh; 136 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name), 137 "temp%u_crit", offset + 1); 138 break; 139 default: 140 rc = -EPERM; 141 return rc; 142 } 143 144 /* These always the same regardless of type */ 145 ixgbe_attr->sensor = 146 &adapter->hw.mac.thermal_sensor_data.sensor[offset]; 147 ixgbe_attr->hw = &adapter->hw; 148 ixgbe_attr->dev_attr.store = NULL; 149 ixgbe_attr->dev_attr.attr.mode = S_IRUGO; 150 ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name; 151 sysfs_attr_init(&ixgbe_attr->dev_attr.attr); 152 153 adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr; 154 155 ++adapter->ixgbe_hwmon_buff->n_hwmon; 156 157 return 0; 158} 159 160static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) 161{ 162} 163 164/* called from ixgbe_main.c */ 165void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) 166{ 167 ixgbe_sysfs_del_adapter(adapter); 168} 169 170/* called from ixgbe_main.c */ 171int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) 172{ 173 struct hwmon_buff *ixgbe_hwmon; 174 struct device *hwmon_dev; 175 unsigned int i; 176 int rc = 0; 177 178 /* If this method isn't defined we don't support thermals */ 179 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { 180 goto exit; 181 } 182 183 /* Don't create thermal hwmon interface if no sensors present */ 184 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) 185 goto exit; 186 187 ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon), 188 GFP_KERNEL); 189 if (ixgbe_hwmon == NULL) { 190 rc = -ENOMEM; 191 goto exit; 192 } 193 adapter->ixgbe_hwmon_buff = ixgbe_hwmon; 194 195 for (i = 0; i < IXGBE_MAX_SENSORS; i++) { 196 /* 197 * Only create hwmon sysfs entries for sensors that have 198 * meaningful data for. 199 */ 200 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 201 continue; 202 203 /* Bail if any hwmon attr struct fails to initialize */ 204 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); 205 if (rc) 206 goto exit; 207 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); 208 if (rc) 209 goto exit; 210 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); 211 if (rc) 212 goto exit; 213 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); 214 if (rc) 215 goto exit; 216 } 217 218 ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group; 219 ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs; 220 221 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, 222 "ixgbe", 223 ixgbe_hwmon, 224 ixgbe_hwmon->groups); 225 if (IS_ERR(hwmon_dev)) 226 rc = PTR_ERR(hwmon_dev); 227exit: 228 return rc; 229} 230 231