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_ */