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1/* SPDX-License-Identifier: GPL-2.02 * Definitions for kernel modules using Dell WMI System Management Driver3 *4 * Copyright (c) 2020 Dell Inc.5 */6 7#ifndef _DELL_WMI_BIOS_ATTR_H_8#define _DELL_WMI_BIOS_ATTR_H_9 10#include <linux/wmi.h>11#include <linux/device.h>12#include <linux/module.h>13#include <linux/kernel.h>14#include <linux/capability.h>15 16#define DRIVER_NAME "dell-wmi-sysman"17#define MAX_BUFF 51218 19#define DELL_WMI_BIOS_ENUMERATION_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF5"20#define DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BFA"21#define DELL_WMI_BIOS_STRING_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF9"22#define DELL_WMI_BIOS_PASSOBJ_ATTRIBUTE_GUID "0894B8D6-44A6-4719-97D7-6AD24108BFD4"23#define DELL_WMI_BIOS_ATTRIBUTES_INTERFACE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF4"24#define DELL_WMI_BIOS_PASSWORD_INTERFACE_GUID "70FE8229-D03B-4214-A1C6-1F884B1A892A"25 26struct enumeration_data {27 struct kobject *attr_name_kobj;28 char display_name_language_code[MAX_BUFF];29 char dell_value_modifier[MAX_BUFF];30 char possible_values[MAX_BUFF];31 char attribute_name[MAX_BUFF];32 char default_value[MAX_BUFF];33 char dell_modifier[MAX_BUFF];34 char display_name[MAX_BUFF];35};36 37struct integer_data {38 struct kobject *attr_name_kobj;39 char display_name_language_code[MAX_BUFF];40 char attribute_name[MAX_BUFF];41 char dell_modifier[MAX_BUFF];42 char display_name[MAX_BUFF];43 int scalar_increment;44 int default_value;45 int min_value;46 int max_value;47};48 49struct str_data {50 struct kobject *attr_name_kobj;51 char display_name_language_code[MAX_BUFF];52 char attribute_name[MAX_BUFF];53 char display_name[MAX_BUFF];54 char default_value[MAX_BUFF];55 char dell_modifier[MAX_BUFF];56 int min_length;57 int max_length;58};59 60struct po_data {61 struct kobject *attr_name_kobj;62 char attribute_name[MAX_BUFF];63 int min_password_length;64 int max_password_length;65};66 67struct wmi_sysman_priv {68 char current_admin_password[MAX_BUFF];69 char current_system_password[MAX_BUFF];70 struct wmi_device *password_attr_wdev;71 struct wmi_device *bios_attr_wdev;72 struct kset *authentication_dir_kset;73 struct kset *main_dir_kset;74 struct device *class_dev;75 struct enumeration_data *enumeration_data;76 int enumeration_instances_count;77 struct integer_data *integer_data;78 int integer_instances_count;79 struct str_data *str_data;80 int str_instances_count;81 struct po_data *po_data;82 int po_instances_count;83 bool pending_changes;84 struct mutex mutex;85};86 87/* global structure used by multiple WMI interfaces */88extern struct wmi_sysman_priv wmi_priv;89 90enum { ENUM, INT, STR, PO };91 92enum {93 ATTR_NAME,94 DISPL_NAME_LANG_CODE,95 DISPLAY_NAME,96 DEFAULT_VAL,97 CURRENT_VAL,98 MODIFIER99};100 101#define get_instance_id(type) \102static int get_##type##_instance_id(struct kobject *kobj) \103{ \104 int i; \105 for (i = 0; i <= wmi_priv.type##_instances_count; i++) { \106 if (!(strcmp(kobj->name, wmi_priv.type##_data[i].attribute_name)))\107 return i; \108 } \109 return -EIO; \110}111 112#define attribute_s_property_show(name, type) \113static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \114 char *buf) \115{ \116 int i = get_##type##_instance_id(kobj); \117 if (i >= 0) \118 return sprintf(buf, "%s\n", wmi_priv.type##_data[i].name); \119 return 0; \120}121 122#define attribute_n_property_show(name, type) \123static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \124 char *buf) \125{ \126 int i = get_##type##_instance_id(kobj); \127 if (i >= 0) \128 return sprintf(buf, "%d\n", wmi_priv.type##_data[i].name); \129 return 0; \130}131 132#define attribute_property_store(curr_val, type) \133static ssize_t curr_val##_store(struct kobject *kobj, \134 struct kobj_attribute *attr, \135 const char *buf, size_t count) \136{ \137 char *p, *buf_cp; \138 int i, ret = -EIO; \139 buf_cp = kstrdup(buf, GFP_KERNEL); \140 if (!buf_cp) \141 return -ENOMEM; \142 p = memchr(buf_cp, '\n', count); \143 \144 if (p != NULL) \145 *p = '\0'; \146 i = get_##type##_instance_id(kobj); \147 if (i >= 0) \148 ret = validate_##type##_input(i, buf_cp); \149 if (!ret) \150 ret = set_attribute(kobj->name, buf_cp); \151 kfree(buf_cp); \152 return ret ? ret : count; \153}154 155#define check_property_type(attr, prop, valuetype) \156 (attr##_obj[prop].type != valuetype)157 158union acpi_object *get_wmiobj_pointer(int instance_id, const char *guid_string);159int get_instance_count(const char *guid_string);160void strlcpy_attr(char *dest, char *src);161 162int populate_enum_data(union acpi_object *enumeration_obj, int instance_id,163 struct kobject *attr_name_kobj, u32 enum_property_count);164int alloc_enum_data(void);165void exit_enum_attributes(void);166 167int populate_int_data(union acpi_object *integer_obj, int instance_id,168 struct kobject *attr_name_kobj);169int alloc_int_data(void);170void exit_int_attributes(void);171 172int populate_str_data(union acpi_object *str_obj, int instance_id, struct kobject *attr_name_kobj);173int alloc_str_data(void);174void exit_str_attributes(void);175 176int populate_po_data(union acpi_object *po_obj, int instance_id, struct kobject *attr_name_kobj);177int alloc_po_data(void);178void exit_po_attributes(void);179 180int set_attribute(const char *a_name, const char *a_value);181int set_bios_defaults(u8 defType);182 183void exit_bios_attr_set_interface(void);184int init_bios_attr_set_interface(void);185int map_wmi_error(int error_code);186size_t calculate_string_buffer(const char *str);187size_t calculate_security_buffer(char *authentication);188void populate_security_buffer(char *buffer, char *authentication);189ssize_t populate_string_buffer(char *buffer, size_t buffer_len, const char *str);190int set_new_password(const char *password_type, const char *new);191int init_bios_attr_pass_interface(void);192void exit_bios_attr_pass_interface(void);193 194#endif195