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/* SPDX-License-Identifier: GPL-2.0
* Definitions for kernel modules using Dell WMI System Management Driver
*
* Copyright (c) 2020 Dell Inc.
*/
#ifndef _DELL_WMI_BIOS_ATTR_H_
#define _DELL_WMI_BIOS_ATTR_H_
#include <linux/wmi.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/capability.h>
#define DRIVER_NAME "dell-wmi-sysman"
#define MAX_BUFF 512
#define DELL_WMI_BIOS_ENUMERATION_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF5"
#define DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BFA"
#define DELL_WMI_BIOS_STRING_ATTRIBUTE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF9"
#define DELL_WMI_BIOS_PASSOBJ_ATTRIBUTE_GUID "0894B8D6-44A6-4719-97D7-6AD24108BFD4"
#define DELL_WMI_BIOS_ATTRIBUTES_INTERFACE_GUID "F1DDEE52-063C-4784-A11E-8A06684B9BF4"
#define DELL_WMI_BIOS_PASSWORD_INTERFACE_GUID "70FE8229-D03B-4214-A1C6-1F884B1A892A"
struct enumeration_data {
struct kobject *attr_name_kobj;
char display_name_language_code[MAX_BUFF];
char dell_value_modifier[MAX_BUFF];
char possible_values[MAX_BUFF];
char attribute_name[MAX_BUFF];
char default_value[MAX_BUFF];
char dell_modifier[MAX_BUFF];
char display_name[MAX_BUFF];
};
struct integer_data {
struct kobject *attr_name_kobj;
char display_name_language_code[MAX_BUFF];
char attribute_name[MAX_BUFF];
char dell_modifier[MAX_BUFF];
char display_name[MAX_BUFF];
int scalar_increment;
int default_value;
int min_value;
int max_value;
};
struct str_data {
struct kobject *attr_name_kobj;
char display_name_language_code[MAX_BUFF];
char attribute_name[MAX_BUFF];
char display_name[MAX_BUFF];
char default_value[MAX_BUFF];
char dell_modifier[MAX_BUFF];
int min_length;
int max_length;
};
struct po_data {
struct kobject *attr_name_kobj;
char attribute_name[MAX_BUFF];
int min_password_length;
int max_password_length;
};
struct wmi_sysman_priv {
char current_admin_password[MAX_BUFF];
char current_system_password[MAX_BUFF];
struct wmi_device *password_attr_wdev;
struct wmi_device *bios_attr_wdev;
struct kset *authentication_dir_kset;
struct kset *main_dir_kset;
struct device *class_dev;
struct enumeration_data *enumeration_data;
int enumeration_instances_count;
struct integer_data *integer_data;
int integer_instances_count;
struct str_data *str_data;
int str_instances_count;
struct po_data *po_data;
int po_instances_count;
bool pending_changes;
struct mutex mutex;
};
/* global structure used by multiple WMI interfaces */
extern struct wmi_sysman_priv wmi_priv;
enum { ENUM, INT, STR, PO };
enum {
ATTR_NAME,
DISPL_NAME_LANG_CODE,
DISPLAY_NAME,
DEFAULT_VAL,
CURRENT_VAL,
MODIFIER
};
#define get_instance_id(type) \
static int get_##type##_instance_id(struct kobject *kobj) \
{ \
int i; \
for (i = 0; i <= wmi_priv.type##_instances_count; i++) { \
if (!(strcmp(kobj->name, wmi_priv.type##_data[i].attribute_name)))\
return i; \
} \
return -EIO; \
}
#define attribute_s_property_show(name, type) \
static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \
char *buf) \
{ \
int i = get_##type##_instance_id(kobj); \
if (i >= 0) \
return sprintf(buf, "%s\n", wmi_priv.type##_data[i].name); \
return 0; \
}
#define attribute_n_property_show(name, type) \
static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \
char *buf) \
{ \
int i = get_##type##_instance_id(kobj); \
if (i >= 0) \
return sprintf(buf, "%d\n", wmi_priv.type##_data[i].name); \
return 0; \
}
#define attribute_property_store(curr_val, type) \
static ssize_t curr_val##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t count) \
{ \
char *p, *buf_cp; \
int i, ret = -EIO; \
buf_cp = kstrdup(buf, GFP_KERNEL); \
if (!buf_cp) \
return -ENOMEM; \
p = memchr(buf_cp, '\n', count); \
\
if (p != NULL) \
*p = '\0'; \
i = get_##type##_instance_id(kobj); \
if (i >= 0) \
ret = validate_##type##_input(i, buf_cp); \
if (!ret) \
ret = set_attribute(kobj->name, buf_cp); \
kfree(buf_cp); \
return ret ? ret : count; \
}
union acpi_object *get_wmiobj_pointer(int instance_id, const char *guid_string);
int get_instance_count(const char *guid_string);
void strlcpy_attr(char *dest, char *src);
int populate_enum_data(union acpi_object *enumeration_obj, int instance_id,
struct kobject *attr_name_kobj);
int alloc_enum_data(void);
void exit_enum_attributes(void);
int populate_int_data(union acpi_object *integer_obj, int instance_id,
struct kobject *attr_name_kobj);
int alloc_int_data(void);
void exit_int_attributes(void);
int populate_str_data(union acpi_object *str_obj, int instance_id, struct kobject *attr_name_kobj);
int alloc_str_data(void);
void exit_str_attributes(void);
int populate_po_data(union acpi_object *po_obj, int instance_id, struct kobject *attr_name_kobj);
int alloc_po_data(void);
void exit_po_attributes(void);
int set_attribute(const char *a_name, const char *a_value);
int set_bios_defaults(u8 defType);
void exit_bios_attr_set_interface(void);
int init_bios_attr_set_interface(void);
int map_wmi_error(int error_code);
size_t calculate_string_buffer(const char *str);
size_t calculate_security_buffer(char *authentication);
void populate_security_buffer(char *buffer, char *authentication);
ssize_t populate_string_buffer(char *buffer, size_t buffer_len, const char *str);
int set_new_password(const char *password_type, const char *new);
int init_bios_attr_pass_interface(void);
void exit_bios_attr_pass_interface(void);
#endif
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