1/* SPDX-License-Identifier: GPL-2.0-or-later */
2
3#ifndef _THINK_LMI_H_
4#define _THINK_LMI_H_
5
6#include <linux/types.h>
7
8#define TLMI_SETTINGS_COUNT 256
9#define TLMI_SETTINGS_MAXLEN 512
10#define TLMI_PWD_BUFSIZE 129
11#define TLMI_LANG_MAXLEN 4
12#define TLMI_INDEX_MAX 32
13
14/* Possible error values */
15struct tlmi_err_codes {
16 const char *err_str;
17 int err_code;
18};
19
20enum encoding_option {
21 TLMI_ENCODING_ASCII,
22 TLMI_ENCODING_SCANCODE,
23};
24
25enum level_option {
26 TLMI_LEVEL_USER,
27 TLMI_LEVEL_MASTER,
28};
29
30/*
31 * There are a limit on the number of WMI operations you can do if you use
32 * the default implementation of saving on every set. This is due to a
33 * limitation in EFI variable space used.
34 * Have a 'bulk save' mode where you can manually trigger the save, and can
35 * therefore set unlimited variables - for users that need it.
36 */
37enum save_mode {
38 TLMI_SAVE_SINGLE,
39 TLMI_SAVE_BULK,
40 TLMI_SAVE_SAVE,
41};
42
43/* password configuration details */
44struct tlmi_pwdcfg_core {
45 uint32_t password_mode;
46 uint32_t password_state;
47 uint32_t min_length;
48 uint32_t max_length;
49 uint32_t supported_encodings;
50 uint32_t supported_keyboard;
51};
52
53struct tlmi_pwdcfg_ext {
54 uint32_t hdd_user_password;
55 uint32_t hdd_master_password;
56 uint32_t nvme_user_password;
57 uint32_t nvme_master_password;
58};
59
60struct tlmi_pwdcfg {
61 struct tlmi_pwdcfg_core core;
62 struct tlmi_pwdcfg_ext ext;
63};
64
65/* password setting details */
66struct tlmi_pwd_setting {
67 struct kobject kobj;
68 bool valid;
69 char password[TLMI_PWD_BUFSIZE];
70 const char *pwd_type;
71 const char *role;
72 int minlen;
73 int maxlen;
74 enum encoding_option encoding;
75 char kbdlang[TLMI_LANG_MAXLEN];
76 int index; /*Used for HDD and NVME auth */
77 enum level_option level;
78 bool cert_installed;
79 char *signature;
80 char *save_signature;
81};
82
83/* Attribute setting details */
84struct tlmi_attr_setting {
85 struct kobject kobj;
86 int index;
87 char display_name[TLMI_SETTINGS_MAXLEN];
88 char *possible_values;
89};
90
91struct think_lmi {
92 struct wmi_device *wmi_device;
93
94 bool can_set_bios_settings;
95 bool can_get_bios_selections;
96 bool can_set_bios_password;
97 bool can_get_password_settings;
98 bool pending_changes;
99 bool can_debug_cmd;
100 bool opcode_support;
101 bool certificate_support;
102 enum save_mode save_mode;
103 bool save_required;
104 bool reboot_required;
105
106 struct tlmi_attr_setting *setting[TLMI_SETTINGS_COUNT];
107 struct device *class_dev;
108 struct kset *attribute_kset;
109 struct kset *authentication_kset;
110
111 struct tlmi_pwdcfg pwdcfg;
112 struct tlmi_pwd_setting *pwd_admin;
113 struct tlmi_pwd_setting *pwd_power;
114 struct tlmi_pwd_setting *pwd_system;
115 struct tlmi_pwd_setting *pwd_hdd;
116 struct tlmi_pwd_setting *pwd_nvme;
117};
118
119#endif /* !_THINK_LMI_H_ */
120

source code of linux/drivers/platform/x86/think-lmi.h