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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 struct 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
53 struct 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
60 struct tlmi_pwdcfg {
61         struct tlmi_pwdcfg_core core;
62         struct tlmi_pwdcfg_ext ext;
63 };
64
65 /* password setting details */
66 struct 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 */
84 struct tlmi_attr_setting {
85         struct kobject kobj;
86         int index;
87         char display_name[TLMI_SETTINGS_MAXLEN];
88         char *possible_values;
89 };
90
91 struct 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_ */
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