tools/testing/selftests/firmware/fw_lib.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/firmware/fw_lib.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/firmware/fw_lib.sh
Extension
.sh
Size
5505 bytes
Lines
237
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# Library of helpers for test scripts.
set -e

DIR=/sys/devices/virtual/misc/test_firmware

PROC_CONFIG="/proc/config.gz"
TEST_DIR=$(dirname $0)

# We need to load a different file to test request_firmware_into_buf
# I believe the issue is firmware loaded cached vs. non-cached
# with same filename is bungled.
# To reproduce rename this to test-firmware.bin
TEST_FIRMWARE_INTO_BUF_FILENAME=test-firmware-into-buf.bin

# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

print_reqs_exit()
{
	echo "You must have the following enabled in your kernel:" >&2
	cat $TEST_DIR/config >&2
	exit $ksft_skip
}

test_modprobe()
{
	if [ ! -d $DIR ]; then
		print_reqs_exit
	fi
}

check_mods()
{
	local uid=$(id -u)
	if [ $uid -ne 0 ]; then
		echo "skip all tests: must be run as root" >&2
		exit $ksft_skip
	fi

	trap "test_modprobe" EXIT
	if [ ! -d $DIR ]; then
		modprobe test_firmware
	fi
	if [ ! -f $PROC_CONFIG ]; then
		if modprobe configs 2>/dev/null; then
			echo "Loaded configs module"
			if [ ! -f $PROC_CONFIG ]; then
				echo "You must have the following enabled in your kernel:" >&2
				cat $TEST_DIR/config >&2
				echo "Resorting to old heuristics" >&2
			fi
		else
			echo "Failed to load configs module, using old heuristics" >&2
		fi
	fi
}

check_setup()
{
	HAS_FW_LOADER_USER_HELPER="$(kconfig_has CONFIG_FW_LOADER_USER_HELPER=y)"
	HAS_FW_LOADER_USER_HELPER_FALLBACK="$(kconfig_has CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y)"
	HAS_FW_LOADER_COMPRESS_XZ="$(kconfig_has CONFIG_FW_LOADER_COMPRESS_XZ=y)"
	HAS_FW_LOADER_COMPRESS_ZSTD="$(kconfig_has CONFIG_FW_LOADER_COMPRESS_ZSTD=y)"
	HAS_FW_UPLOAD="$(kconfig_has CONFIG_FW_UPLOAD=y)"
	PROC_FW_IGNORE_SYSFS_FALLBACK="0"
	PROC_FW_FORCE_SYSFS_FALLBACK="0"

Annotation

Implementation Notes