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// SPDX-License-Identifier: GPL-2.0-only
/*
* processor thermal device for Workload type hints
* update from user space
*
* Copyright (c) 2020-2023, Intel Corporation.
*/
#include <linux/pci.h>
#include "processor_thermal_device.h"
/* List of workload types */
static const char * const workload_types[] = {
"none",
"idle",
"semi_active",
"bursty",
"sustained",
"battery_life",
NULL
};
static ssize_t workload_available_types_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int i = 0;
int ret = 0;
while (workload_types[i] != NULL)
ret += sprintf(&buf[ret], "%s ", workload_types[i++]);
ret += sprintf(&buf[ret], "\n");
return ret;
}
static DEVICE_ATTR_RO(workload_available_types);
static ssize_t workload_type_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
char str_preference[15];
u32 data = 0;
ssize_t ret;
ret = sscanf(buf, "%14s", str_preference);
if (ret != 1)
return -EINVAL;
ret = match_string(workload_types, -1, str_preference);
if (ret < 0)
return ret;
ret &= 0xff;
if (ret)
data = BIT(MBOX_DATA_BIT_VALID) | BIT(MBOX_DATA_BIT_AC_DC);
data |= ret;
ret = processor_thermal_send_mbox_write_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_WRITE, data);
if (ret)
return false;
return count;
}
static ssize_t workload_type_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
u64 cmd_resp;
int ret;
ret = processor_thermal_send_mbox_read_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_READ, &cmd_resp);
if (ret)
return false;
cmd_resp &= 0xff;
if (cmd_resp > ARRAY_SIZE(workload_types) - 1)
return -EINVAL;
return sprintf(buf, "%s\n", workload_types[cmd_resp]);
}
static DEVICE_ATTR_RW(workload_type);
static struct attribute *workload_req_attrs[] = {
&dev_attr_workload_available_types.attr,
&dev_attr_workload_type.attr,
NULL
};
static const struct attribute_group workload_req_attribute_group = {
.attrs = workload_req_attrs,
.name = "workload_request"
};
static bool workload_req_created;
int proc_thermal_wt_req_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
{
u64 cmd_resp;
int ret;
/* Check if there is a mailbox support, if fails return success */
ret = processor_thermal_send_mbox_read_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_READ, &cmd_resp);
if (ret)
return 0;
ret = sysfs_create_group(&pdev->dev.kobj, &workload_req_attribute_group);
if (ret)
return ret;
workload_req_created = true;
return 0;
}
EXPORT_SYMBOL_GPL(proc_thermal_wt_req_add);
void proc_thermal_wt_req_remove(struct pci_dev *pdev)
{
if (workload_req_created)
sysfs_remove_group(&pdev->dev.kobj, &workload_req_attribute_group);
workload_req_created = false;
}
EXPORT_SYMBOL_GPL(proc_thermal_wt_req_remove);
MODULE_IMPORT_NS("INT340X_THERMAL");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Processor Thermal Work Load type request Interface");
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