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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 1999 - 2018 Intel Corporation. */3 4#include "ixgbe.h"5#include "ixgbe_common.h"6#include "ixgbe_type.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 16/* hwmon callback functions */17static ssize_t ixgbe_hwmon_show_location(struct device *dev,18 struct device_attribute *attr,19 char *buf)20{21 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,22 dev_attr);23 return sprintf(buf, "loc%u\n",24 ixgbe_attr->sensor->location);25}26 27static ssize_t ixgbe_hwmon_show_temp(struct device *dev,28 struct device_attribute *attr,29 char *buf)30{31 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,32 dev_attr);33 unsigned int value;34 35 /* reset the temp field */36 ixgbe_attr->hw->mac.ops.get_thermal_sensor_data(ixgbe_attr->hw);37 38 value = ixgbe_attr->sensor->temp;39 40 /* display millidegree */41 value *= 1000;42 43 return sprintf(buf, "%u\n", value);44}45 46static ssize_t ixgbe_hwmon_show_cautionthresh(struct device *dev,47 struct device_attribute *attr,48 char *buf)49{50 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,51 dev_attr);52 unsigned int value = ixgbe_attr->sensor->caution_thresh;53 54 /* display millidegree */55 value *= 1000;56 57 return sprintf(buf, "%u\n", value);58}59 60static ssize_t ixgbe_hwmon_show_maxopthresh(struct device *dev,61 struct device_attribute *attr,62 char *buf)63{64 struct hwmon_attr *ixgbe_attr = container_of(attr, struct hwmon_attr,65 dev_attr);66 unsigned int value = ixgbe_attr->sensor->max_op_thresh;67 68 /* display millidegree */69 value *= 1000;70 71 return sprintf(buf, "%u\n", value);72}73 74/**75 * ixgbe_add_hwmon_attr - Create hwmon attr table for a hwmon sysfs file.76 * @adapter: pointer to the adapter structure77 * @offset: offset in the eeprom sensor data table78 * @type: type of sensor data to display79 *80 * For each file we want in hwmon's sysfs interface we need a device_attribute81 * This is included in our hwmon_attr struct that contains the references to82 * the data structures we need to get the data to display.83 */84static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter,85 unsigned int offset, int type) {86 int rc;87 unsigned int n_attr;88 struct hwmon_attr *ixgbe_attr;89 90 n_attr = adapter->ixgbe_hwmon_buff->n_hwmon;91 ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr];92 93 switch (type) {94 case IXGBE_HWMON_TYPE_LOC:95 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_location;96 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),97 "temp%u_label", offset + 1);98 break;99 case IXGBE_HWMON_TYPE_TEMP:100 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_temp;101 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),102 "temp%u_input", offset + 1);103 break;104 case IXGBE_HWMON_TYPE_CAUTION:105 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_cautionthresh;106 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),107 "temp%u_max", offset + 1);108 break;109 case IXGBE_HWMON_TYPE_MAX:110 ixgbe_attr->dev_attr.show = ixgbe_hwmon_show_maxopthresh;111 snprintf(ixgbe_attr->name, sizeof(ixgbe_attr->name),112 "temp%u_crit", offset + 1);113 break;114 default:115 rc = -EPERM;116 return rc;117 }118 119 /* These always the same regardless of type */120 ixgbe_attr->sensor =121 &adapter->hw.mac.thermal_sensor_data.sensor[offset];122 ixgbe_attr->hw = &adapter->hw;123 ixgbe_attr->dev_attr.store = NULL;124 ixgbe_attr->dev_attr.attr.mode = 0444;125 ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name;126 sysfs_attr_init(&ixgbe_attr->dev_attr.attr);127 128 adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr;129 130 ++adapter->ixgbe_hwmon_buff->n_hwmon;131 132 return 0;133}134 135static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter)136{137}138 139/* called from ixgbe_main.c */140void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter)141{142 ixgbe_sysfs_del_adapter(adapter);143}144 145/* called from ixgbe_main.c */146int ixgbe_sysfs_init(struct ixgbe_adapter *adapter)147{148 struct hwmon_buff *ixgbe_hwmon;149 struct device *hwmon_dev;150 unsigned int i;151 int rc = 0;152 153 /* If this method isn't defined we don't support thermals */154 if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) {155 goto exit;156 }157 158 /* Don't create thermal hwmon interface if no sensors present */159 if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw))160 goto exit;161 162 ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon),163 GFP_KERNEL);164 if (ixgbe_hwmon == NULL) {165 rc = -ENOMEM;166 goto exit;167 }168 adapter->ixgbe_hwmon_buff = ixgbe_hwmon;169 170 for (i = 0; i < IXGBE_MAX_SENSORS; i++) {171 /*172 * Only create hwmon sysfs entries for sensors that have173 * meaningful data for.174 */175 if (adapter->hw.mac.thermal_sensor_data.sensor[i].location == 0)176 continue;177 178 /* Bail if any hwmon attr struct fails to initialize */179 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION);180 if (rc)181 goto exit;182 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC);183 if (rc)184 goto exit;185 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP);186 if (rc)187 goto exit;188 rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX);189 if (rc)190 goto exit;191 }192 193 ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group;194 ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs;195 196 hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev,197 "ixgbe",198 ixgbe_hwmon,199 ixgbe_hwmon->groups);200 if (IS_ERR(hwmon_dev))201 rc = PTR_ERR(hwmon_dev);202exit:203 return rc;204}205 206