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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * processor thermal device for Workload type hints4 * update from user space5 *6 * Copyright (c) 2020-2023, Intel Corporation.7 */8 9#include <linux/pci.h>10#include "processor_thermal_device.h"11 12/* List of workload types */13static const char * const workload_types[] = {14 "none",15 "idle",16 "semi_active",17 "bursty",18 "sustained",19 "battery_life",20 NULL21};22 23static ssize_t workload_available_types_show(struct device *dev,24 struct device_attribute *attr,25 char *buf)26{27 int i = 0;28 int ret = 0;29 30 while (workload_types[i] != NULL)31 ret += sprintf(&buf[ret], "%s ", workload_types[i++]);32 33 ret += sprintf(&buf[ret], "\n");34 35 return ret;36}37 38static DEVICE_ATTR_RO(workload_available_types);39 40static ssize_t workload_type_store(struct device *dev,41 struct device_attribute *attr,42 const char *buf, size_t count)43{44 struct pci_dev *pdev = to_pci_dev(dev);45 char str_preference[15];46 u32 data = 0;47 ssize_t ret;48 49 ret = sscanf(buf, "%14s", str_preference);50 if (ret != 1)51 return -EINVAL;52 53 ret = match_string(workload_types, -1, str_preference);54 if (ret < 0)55 return ret;56 57 ret &= 0xff;58 59 if (ret)60 data = BIT(MBOX_DATA_BIT_VALID) | BIT(MBOX_DATA_BIT_AC_DC);61 62 data |= ret;63 64 ret = processor_thermal_send_mbox_write_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_WRITE, data);65 if (ret)66 return false;67 68 return count;69}70 71static ssize_t workload_type_show(struct device *dev,72 struct device_attribute *attr,73 char *buf)74{75 struct pci_dev *pdev = to_pci_dev(dev);76 u64 cmd_resp;77 int ret;78 79 ret = processor_thermal_send_mbox_read_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_READ, &cmd_resp);80 if (ret)81 return false;82 83 cmd_resp &= 0xff;84 85 if (cmd_resp > ARRAY_SIZE(workload_types) - 1)86 return -EINVAL;87 88 return sprintf(buf, "%s\n", workload_types[cmd_resp]);89}90 91static DEVICE_ATTR_RW(workload_type);92 93static struct attribute *workload_req_attrs[] = {94 &dev_attr_workload_available_types.attr,95 &dev_attr_workload_type.attr,96 NULL97};98 99static const struct attribute_group workload_req_attribute_group = {100 .attrs = workload_req_attrs,101 .name = "workload_request"102};103 104static bool workload_req_created;105 106int proc_thermal_wt_req_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)107{108 u64 cmd_resp;109 int ret;110 111 /* Check if there is a mailbox support, if fails return success */112 ret = processor_thermal_send_mbox_read_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_READ, &cmd_resp);113 if (ret)114 return 0;115 116 ret = sysfs_create_group(&pdev->dev.kobj, &workload_req_attribute_group);117 if (ret)118 return ret;119 120 workload_req_created = true;121 122 return 0;123}124EXPORT_SYMBOL_GPL(proc_thermal_wt_req_add);125 126void proc_thermal_wt_req_remove(struct pci_dev *pdev)127{128 if (workload_req_created)129 sysfs_remove_group(&pdev->dev.kobj, &workload_req_attribute_group);130 131 workload_req_created = false;132}133EXPORT_SYMBOL_GPL(proc_thermal_wt_req_remove);134 135MODULE_IMPORT_NS(INT340X_THERMAL);136MODULE_LICENSE("GPL");137MODULE_DESCRIPTION("Processor Thermal Work Load type request Interface");138