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 #ifdef CONFIG_IXGBE_HWMON 41 /* hwmon callback functions */ 42 static 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 52 static 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 71 static 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 85 static 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 */ 109 static 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); 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); 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); 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); 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; 151 152 rc = device_create_file(&adapter->pdev->dev, 153 &ixgbe_attr->dev_attr); 154 155 if (rc == 0) 156 ++adapter->ixgbe_hwmon_buff.n_hwmon; 157 158 return rc; 159 } 160 161 static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) 162 { 163 int i; 164 165 if (adapter == NULL) 166 return; 167 168 for (i = 0; i < adapter->ixgbe_hwmon_buff.n_hwmon; i++) { 169 device_remove_file(&adapter->pdev->dev, 170 &adapter->ixgbe_hwmon_buff.hwmon_list[i].dev_attr); 171 } 172 173 kfree(adapter->ixgbe_hwmon_buff.hwmon_list); 174 175 if (adapter->ixgbe_hwmon_buff.device) 176 hwmon_device_unregister(adapter->ixgbe_hwmon_buff.device); 177 } 178 179 /* called from ixgbe_main.c */ 180 void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) 181 { 182 ixgbe_sysfs_del_adapter(adapter); 183 } 184 185 /* called from ixgbe_main.c */ 186 int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) 187 { 188 struct hwmon_buff *ixgbe_hwmon = &adapter->ixgbe_hwmon_buff; 189 unsigned int i; 190 int n_attrs; 191 int rc = 0; 192 193 /* If this method isn't defined we don't support thermals */ 194 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) { 195 goto exit; 196 } 197 198 /* Don't create thermal hwmon interface if no sensors present */ 199 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) 200 goto exit; 201 202 /* 203 * Allocation space for max attributs 204 * max num sensors * values (loc, temp, max, caution) 205 */ 206 n_attrs = IXGBE_MAX_SENSORS * 4; 207 ixgbe_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), 208 GFP_KERNEL); 209 if (!ixgbe_hwmon->hwmon_list) { 210 rc = -ENOMEM; 211 goto err; 212 } 213 214 ixgbe_hwmon->device = hwmon_device_register(&adapter->pdev->dev); 215 if (IS_ERR(ixgbe_hwmon->device)) { 216 rc = PTR_ERR(ixgbe_hwmon->device); 217 goto err; 218 } 219 220 for (i = 0; i < IXGBE_MAX_SENSORS; i++) { 221 /* 222 * Only create hwmon sysfs entries for sensors that have 223 * meaningful data for. 224 */ 225 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0) 226 continue; 227 228 /* Bail if any hwmon attr struct fails to initialize */ 229 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); 230 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); 231 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); 232 rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); 233 if (rc) 234 goto err; 235 } 236 237 goto exit; 238 239 err: 240 ixgbe_sysfs_del_adapter(adapter); 241 exit: 242 return rc; 243 } 244 #endif /* CONFIG_IXGBE_HWMON */ 245 246