1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * processor thermal device for Workload type hints
4 * update from user space
5 *
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	NULL
21};
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	NULL
97};
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");
137