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