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[linux.git] / drivers / platform / x86 / think-lmi.h
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 */
15 struct tlmi_err_codes {
16         const char *err_str;
17         int err_code;
18 };
19
20 enum encoding_option {
21         TLMI_ENCODING_ASCII,
22         TLMI_ENCODING_SCANCODE,
23 };
24
25 enum 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  */
37 enum save_mode {
38         TLMI_SAVE_SINGLE,
39         TLMI_SAVE_BULK,
40         TLMI_SAVE_SAVE,
41 };
42
43 /* password configuration details */
44 #define TLMI_PWDCFG_MODE_LEGACY    0
45 #define TLMI_PWDCFG_MODE_PASSWORD  1
46 #define TLMI_PWDCFG_MODE_MULTICERT 3
47
48 struct tlmi_pwdcfg_core {
49         uint32_t password_mode;
50         uint32_t password_state;
51         uint32_t min_length;
52         uint32_t max_length;
53         uint32_t supported_encodings;
54         uint32_t supported_keyboard;
55 };
56
57 struct tlmi_pwdcfg_ext {
58         uint32_t hdd_user_password;
59         uint32_t hdd_master_password;
60         uint32_t nvme_user_password;
61         uint32_t nvme_master_password;
62 };
63
64 struct tlmi_pwdcfg {
65         struct tlmi_pwdcfg_core core;
66         struct tlmi_pwdcfg_ext ext;
67 };
68
69 /* password setting details */
70 struct tlmi_pwd_setting {
71         struct kobject kobj;
72         bool pwd_enabled;
73         char password[TLMI_PWD_BUFSIZE];
74         const char *pwd_type;
75         const char *role;
76         int minlen;
77         int maxlen;
78         enum encoding_option encoding;
79         char kbdlang[TLMI_LANG_MAXLEN];
80         int index; /*Used for HDD and NVME auth */
81         enum level_option level;
82         bool cert_installed;
83         char *signature;
84         char *save_signature;
85 };
86
87 /* Attribute setting details */
88 struct tlmi_attr_setting {
89         struct kobject kobj;
90         int index;
91         char display_name[TLMI_SETTINGS_MAXLEN];
92         char *possible_values;
93 };
94
95 struct think_lmi {
96         struct wmi_device *wmi_device;
97
98         bool can_set_bios_settings;
99         bool can_get_bios_selections;
100         bool can_set_bios_password;
101         bool can_get_password_settings;
102         bool pending_changes;
103         bool can_debug_cmd;
104         bool opcode_support;
105         bool certificate_support;
106         enum save_mode save_mode;
107         bool save_required;
108         bool reboot_required;
109
110         struct tlmi_attr_setting *setting[TLMI_SETTINGS_COUNT];
111         struct device *class_dev;
112         struct kset *attribute_kset;
113         struct kset *authentication_kset;
114
115         struct tlmi_pwdcfg pwdcfg;
116         struct tlmi_pwd_setting *pwd_admin;
117         struct tlmi_pwd_setting *pwd_power;
118         struct tlmi_pwd_setting *pwd_system;
119         struct tlmi_pwd_setting *pwd_hdd;
120         struct tlmi_pwd_setting *pwd_nvme;
121 };
122
123 #endif /* !_THINK_LMI_H_ */
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