path: root/lib/test_firmware.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This module provides an interface to trigger and test firmware loading.
 *
 * It is designed to be used for basic evaluation of the firmware loading
 * subsystem (for example when validating firmware verification). It lacks
 * any extra dependencies, and will not normally be loaded by the system
 * unless explicitly requested by name.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/vmalloc.h>
#include <linux/efi_embedded_fw.h>

MODULE_IMPORT_NS(TEST_FIRMWARE);

#define TEST_FIRMWARE_NAME	"test-firmware.bin"
#define TEST_FIRMWARE_NUM_REQS	4
#define TEST_FIRMWARE_BUF_SIZE	SZ_1K
#define TEST_UPLOAD_MAX_SIZE	SZ_2K
#define TEST_UPLOAD_BLK_SIZE	37	/* Avoid powers of two in testing */

static DEFINE_MUTEX(test_fw_mutex);
static const