xref: /openbmc/linux/include/uapi/linux/wmi.h (revision d9c52522)
1 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
2 /*
3  *  User API methods for ACPI-WMI mapping driver
4  *
5  *  Copyright (C) 2017 Dell, Inc.
6  */
7 #ifndef _UAPI_LINUX_WMI_H
8 #define _UAPI_LINUX_WMI_H
9 
10 #include <linux/ioctl.h>
11 #include <linux/types.h>
12 
13 /* WMI bus will filter all WMI vendor driver requests through this IOC */
14 #define WMI_IOC 'W'
15 
16 /* All ioctl requests through WMI should declare their size followed by
17  * relevant data objects
18  */
19 struct wmi_ioctl_buffer {
20 	__u64	length;
21 	__u8	data[];
22 };
23 
24 /* This structure may be modified by the firmware when we enter
25  * system management mode through SMM, hence the volatiles
26  */
27 struct calling_interface_buffer {
28 	__u16 cmd_class;
29 	__u16 cmd_select;
30 	volatile __u32 input[4];
31 	volatile __u32 output[4];
32 } __packed;
33 
34 struct dell_wmi_extensions {
35 	__u32 argattrib;
36 	__u32 blength;
37 	__u8 data[];
38 } __packed;
39 
40 struct dell_wmi_smbios_buffer {
41 	__u64 length;
42 	struct calling_interface_buffer std;
43 	struct dell_wmi_extensions	ext;
44 } __packed;
45 
46 /* Whitelisted smbios class/select commands */
47 #define CLASS_TOKEN_READ	0
48 #define CLASS_TOKEN_WRITE	1
49 #define SELECT_TOKEN_STD	0
50 #define SELECT_TOKEN_BAT	1
51 #define SELECT_TOKEN_AC		2
52 #define CLASS_FLASH_INTERFACE	7
53 #define SELECT_FLASH_INTERFACE	3
54 #define CLASS_ADMIN_PROP	10
55 #define SELECT_ADMIN_PROP	3
56 #define CLASS_INFO		17
57 #define SELECT_RFKILL		11
58 #define SELECT_APP_REGISTRATION	3
59 #define SELECT_DOCK		22
60 
61 /* whitelisted tokens */
62 #define CAPSULE_EN_TOKEN	0x0461
63 #define CAPSULE_DIS_TOKEN	0x0462
64 #define WSMT_EN_TOKEN		0x04EC
65 #define WSMT_DIS_TOKEN		0x04ED
66 
67 /* Dell SMBIOS calling IOCTL command used by dell-smbios-wmi */
68 #define DELL_WMI_SMBIOS_CMD	_IOWR(WMI_IOC, 0, struct dell_wmi_smbios_buffer)
69 
70 #endif
71