linux/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Functions corresponding to password object type attributes under
 * BIOS PASSWORD for use with hp-bioscfg driver.
 *
 * Copyright (c) 2022 HP Development Company, L.P.
 */

#include "bioscfg.h"

GET_INSTANCE_ID(password);
/*
 * Clear all passwords copied to memory for a particular
 * authentication instance
 */
static int clear_passwords(const int instance)
{ … }

/*
 * Clear all credentials copied to memory for both Power-ON and Setup
 * BIOS instances
 */
int hp_clear_all_credentials(void)
{ … }

int hp_get_password_instance_for_type(const char *name)
{ … }

static int validate_password_input(int instance_id, const char *buf)
{ … }

ATTRIBUTE_N_PROPERTY_SHOW(is_enabled, password);
static struct kobj_attribute password_is_password_set = …;

static int store_password_instance(struct kobject *kobj, const char *buf,
				   size_t count, bool is_current)
{ … }

static ssize_t current_password_store(struct kobject *kobj,
				      struct kobj_attribute *attr,
				      const char *buf, size_t count)
{ … }

static struct kobj_attribute password_current_password = …;

static ssize_t new_password_store(struct kobject *kobj,
				  struct kobj_attribute *attr,
				  const char *buf, size_t count)
{ … }

static struct kobj_attribute password_new_password = …;

ATTRIBUTE_N_PROPERTY_SHOW(min_password_length, password);
static struct kobj_attribute password_min_password_length = …;

ATTRIBUTE_N_PROPERTY_SHOW(max_password_length, password);
static struct kobj_attribute password_max_password_length = …;

static ssize_t role_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{ … }

static struct kobj_attribute password_role = …;

static ssize_t mechanism_show(struct kobject *kobj, struct kobj_attribute *attr,
			      char *buf)
{ … }

static struct kobj_attribute password_mechanism = …;

ATTRIBUTE_VALUES_PROPERTY_SHOW(encodings, password, SEMICOLON_SEP);
static struct kobj_attribute password_encodings_val = …;

static struct attribute *password_attrs[] = …;

static const struct attribute_group password_attr_group = …;

int hp_alloc_password_data(void)
{ … }

/* Expected Values types associated with each element */
static const acpi_object_type expected_password_types[] = …;

static int hp_populate_password_elements_from_package(union acpi_object *password_obj,
						      int password_obj_count,
						      int instance_id)
{ … }

/**
 * hp_populate_password_package_data()
 *	Populate all properties for an instance under password attribute
 *
 * @password_obj: ACPI object with password data
 * @instance_id: The instance to enumerate
 * @attr_name_kobj: The parent kernel object
 */
int hp_populate_password_package_data(union acpi_object *password_obj, int instance_id,
				      struct kobject *attr_name_kobj)
{ … }

static int hp_populate_password_elements_from_buffer(u8 *buffer_ptr, u32 *buffer_size,
						     int instance_id)
{ … }

/**
 * hp_populate_password_buffer_data()
 * Populate all properties for an instance under password object attribute
 *
 * @buffer_ptr: Buffer pointer
 * @buffer_size: Buffer size
 * @instance_id: The instance to enumerate
 * @attr_name_kobj: The parent kernel object
 */
int hp_populate_password_buffer_data(u8 *buffer_ptr, u32 *buffer_size, int instance_id,
				     struct kobject *attr_name_kobj)
{ … }

/**
 * hp_exit_password_attributes() - Clear all attribute data
 *
 * Clears all data allocated for this group of attributes
 */
void hp_exit_password_attributes(void)
{ … }