1 /******************************************************************************* 2 3 Intel 10 Gigabit PCI Express Linux driver 4 Copyright(c) 1999 - 2012 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); 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); 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); 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); 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; 150 151 rc = device_create_file(&adapter->pdev->dev, 152 &ixgbe_attr->dev_attr); 153 154 if (rc == 0) 155 ++adapter->ixgbe_hwmon_buff.n_hwmon; 156 157 return rc; 158 } 159 160 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) 161 { 162 int i; 163 164 if (adapter == NULL) 165 return; 166 167 for (i = 0; i < adapter->ixgbe_hwmon_buff.n_hwmon; i++) { 168 device_remove_file(&adapter->pdev->dev, 169 &adapter->ixgbe_hwmon_buff.hwmon_list[i].dev_attr); 170 } 171 172 kfree(adapter->ixgbe_hwmon_buff.hwmon_list); 173 174 if (adapter->ixgbe_hwmon_buff.device) 175 hwmon_device_unregister(adapter->ixgbe_hwmon_buff.device); 176 } 177 178 /* called from ixgbe_main.c */ 179 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) 180 { 181 ixgbe_sysfs_del_adapter(adapter); 182 } 183 184 /* called from ixgbe_main.c */ 185 int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) 186 { 187 struct hwmon_buff *ixgbe_hwmon = &adapter->ixgbe_hwmon_buff; 188 unsigned int i; 189 int n_attrs; 190 int rc = 0; 191 192 /* If this method isn't defined we don't support thermals */ 193 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { 194 goto exit; 195 } 196 197 /* Don't create thermal hwmon interface if no sensors present */ 198 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) 199 goto exit; 200 201 /* 202 * Allocation space for max attributs 203 * max num sensors * values (loc, temp, max, caution) 204 */ 205 n_attrs = IXGBE_MAX_SENSORS * 4; 206 ixgbe_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), 207 GFP_KERNEL); 208 if (!ixgbe_hwmon->hwmon_list) { 209 rc = -ENOMEM; 210 goto err; 211 } 212 213 ixgbe_hwmon->device = hwmon_device_register(&adapter->pdev->dev); 214 if (IS_ERR(ixgbe_hwmon->device)) { 215 rc = PTR_ERR(ixgbe_hwmon->device); 216 goto err; 217 } 218 219 for (i = 0; i < IXGBE_MAX_SENSORS; i++) { 220 /* 221 * Only create hwmon sysfs entries for sensors that have 222 * meaningful data for. 223 */ 224 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 225 continue; 226 227 /* Bail if any hwmon attr struct fails to initialize */ 228 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); 229 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); 230 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); 231 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); 232 if (rc) 233 goto err; 234 } 235 236 goto exit; 237 238 err: 239 ixgbe_sysfs_del_adapter(adapter); 240 exit: 241 return rc; 242 } 243 244