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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 2007 - 2018 Intel Corporation. */3 4#include "igb.h"5#include "e1000_82575.h"6#include "e1000_hw.h"7 8#include <linux/module.h>9#include <linux/types.h>10#include <linux/sysfs.h>11#include <linux/kobject.h>12#include <linux/device.h>13#include <linux/netdevice.h>14#include <linux/hwmon.h>15#include <linux/pci.h>16 17#ifdef CONFIG_IGB_HWMON18static struct i2c_board_info i350_sensor_info = {19 I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)),20};21 22/* hwmon callback functions */23static ssize_t igb_hwmon_show_location(struct device *dev,24 struct device_attribute *attr,25 char *buf)26{27 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,28 dev_attr);29 return sprintf(buf, "loc%u\n",30 igb_attr->sensor->location);31}32 33static ssize_t igb_hwmon_show_temp(struct device *dev,34 struct device_attribute *attr,35 char *buf)36{37 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,38 dev_attr);39 unsigned int value;40 41 /* reset the temp field */42 igb_attr->hw->mac.ops.get_thermal_sensor_data(igb_attr->hw);43 44 value = igb_attr->sensor->temp;45 46 /* display millidegree */47 value *= 1000;48 49 return sprintf(buf, "%u\n", value);50}51 52static ssize_t igb_hwmon_show_cautionthresh(struct device *dev,53 struct device_attribute *attr,54 char *buf)55{56 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,57 dev_attr);58 unsigned int value = igb_attr->sensor->caution_thresh;59 60 /* display millidegree */61 value *= 1000;62 63 return sprintf(buf, "%u\n", value);64}65 66static ssize_t igb_hwmon_show_maxopthresh(struct device *dev,67 struct device_attribute *attr,68 char *buf)69{70 struct hwmon_attr *igb_attr = container_of(attr, struct hwmon_attr,71 dev_attr);72 unsigned int value = igb_attr->sensor->max_op_thresh;73 74 /* display millidegree */75 value *= 1000;76 77 return sprintf(buf, "%u\n", value);78}79 80/* igb_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.81 * @ adapter: pointer to the adapter structure82 * @ offset: offset in the eeprom sensor data table83 * @ type: type of sensor data to display84 *85 * For each file we want in hwmon's sysfs interface we need a device_attribute86 * This is included in our hwmon_attr struct that contains the references to87 * the data structures we need to get the data to display.88 */89static int igb_add_hwmon_attr(struct igb_adapter *adapter,90 unsigned int offset, int type)91{92 int rc;93 unsigned int n_attr;94 struct hwmon_attr *igb_attr;95 96 n_attr = adapter->igb_hwmon_buff->n_hwmon;97 igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr];98 99 switch (type) {100 case IGB_HWMON_TYPE_LOC:101 igb_attr->dev_attr.show = igb_hwmon_show_location;102 snprintf(igb_attr->name, sizeof(igb_attr->name),103 "temp%u_label", offset + 1);104 break;105 case IGB_HWMON_TYPE_TEMP:106 igb_attr->dev_attr.show = igb_hwmon_show_temp;107 snprintf(igb_attr->name, sizeof(igb_attr->name),108 "temp%u_input", offset + 1);109 break;110 case IGB_HWMON_TYPE_CAUTION:111 igb_attr->dev_attr.show = igb_hwmon_show_cautionthresh;112 snprintf(igb_attr->name, sizeof(igb_attr->name),113 "temp%u_max", offset + 1);114 break;115 case IGB_HWMON_TYPE_MAX:116 igb_attr->dev_attr.show = igb_hwmon_show_maxopthresh;117 snprintf(igb_attr->name, sizeof(igb_attr->name),118 "temp%u_crit", offset + 1);119 break;120 default:121 rc = -EPERM;122 return rc;123 }124 125 /* These always the same regardless of type */126 igb_attr->sensor =127 &adapter->hw.mac.thermal_sensor_data.sensor[offset];128 igb_attr->hw = &adapter->hw;129 igb_attr->dev_attr.store = NULL;130 igb_attr->dev_attr.attr.mode = 0444;131 igb_attr->dev_attr.attr.name = igb_attr->name;132 sysfs_attr_init(&igb_attr->dev_attr.attr);133 134 adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr;135 136 ++adapter->igb_hwmon_buff->n_hwmon;137 138 return 0;139}140 141static void igb_sysfs_del_adapter(struct igb_adapter *adapter)142{143}144 145/* called from igb_main.c */146void igb_sysfs_exit(struct igb_adapter *adapter)147{148 igb_sysfs_del_adapter(adapter);149}150 151/* called from igb_main.c */152int igb_sysfs_init(struct igb_adapter *adapter)153{154 struct hwmon_buff *igb_hwmon;155 struct i2c_client *client;156 struct device *hwmon_dev;157 unsigned int i;158 int rc = 0;159 160 /* If this method isn't defined we don't support thermals */161 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL)162 goto exit;163 164 /* Don't create thermal hwmon interface if no sensors present */165 rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw));166 if (rc)167 goto exit;168 169 igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon),170 GFP_KERNEL);171 if (!igb_hwmon) {172 rc = -ENOMEM;173 goto exit;174 }175 adapter->igb_hwmon_buff = igb_hwmon;176 177 for (i = 0; i < E1000_MAX_SENSORS; i++) {178 179 /* Only create hwmon sysfs entries for sensors that have180 * meaningful data.181 */182 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)183 continue;184 185 /* Bail if any hwmon attr struct fails to initialize */186 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION);187 if (rc)188 goto exit;189 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC);190 if (rc)191 goto exit;192 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP);193 if (rc)194 goto exit;195 rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX);196 if (rc)197 goto exit;198 }199 200 /* init i2c_client */201 client = i2c_new_client_device(&adapter->i2c_adap, &i350_sensor_info);202 if (IS_ERR(client)) {203 dev_info(&adapter->pdev->dev,204 "Failed to create new i2c device.\n");205 rc = PTR_ERR(client);206 goto exit;207 }208 adapter->i2c_client = client;209 210 igb_hwmon->groups[0] = &igb_hwmon->group;211 igb_hwmon->group.attrs = igb_hwmon->attrs;212 213 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,214 client->name,215 igb_hwmon,216 igb_hwmon->groups);217 if (IS_ERR(hwmon_dev)) {218 rc = PTR_ERR(hwmon_dev);219 goto err;220 }221 222 goto exit;223 224err:225 igb_sysfs_del_adapter(adapter);226exit:227 return rc;228}229#endif230