scripts/qat_setup: Make sure the out-of-tree intel_qat driver is in use

#!/usr/bin/env bash

shopt -s nullglob

rootdir=$(readlink -f $(dirname $0))/..

igb_driverdir=$rootdir/dpdk/build/build/kernel/igb_uio/

allowed_drivers=("igb_uio" "uio_pci_generic")

reload_intel_qat() {

	# We need to make sure the out-of-tree intel_qat driver, provided via vm_setup.sh, is in

	# use. Otherwise, some dependency modules loaded by qat_service may fail causing some

	# disturbance later on during the tests - in particular, it's been seen that the adf_ctl

	# was returning inconsistent data (wrong pci addresses), confusing the service into

	# believing SR-IOV is not enabled.

	# If this file doesn't exist, then either intel_qat is a kernel built-in or is not loaded.

	# Nothing to do in such cases, qat_service will load the module for us.

	[[ -e /sys/module/intel_qat/taint ]] || return 0

	local t v

	t=$(< /sys/module/intel_qat/taint)

	v=$(< /sys/module/intel_qat/version)

	# OE - out-of-tree, unsigned. By the very default, drivers built via vm_setup.sh are not

	# signed.

	[[ -z $t || $t != *"OE"* ]] || return 0

	# Check the version of loaded module against the version of the same module as seen

	# from .dep. perspective. if these are the same the most likely something is broken

	# with the dependencies. We report a failure in such a case since reloading the module

	# won't do any good anyway.

	if [[ $(modinfo -F version intel_qat) == "$v" ]]; then

		cat <<- WARN

			Upstream intel_qat driver detected. Same version of the driver is seen

			in modules dependencies: $v. This may mean QAT build didn't update

			dependencies properly. QAT setup may fail, please, rebuild the QAT

			driver.

		WARN

		return 0

	fi

	# Ok, intel_qat is an upstream module, replace it with the out-of-tree one.

	echo "Reloading intel_qat module"

	local h=(/sys/module/intel_qat/holders/*)

	h=("${h[@]##*/}")

	modprobe -r "${h[@]}" intel_qat

	# qat_service does that too, but be vigilant

	modprobe -a intel_qat "${h[@]}"

}

# This script requires an igb_uio kernel module binary located at $igb_driverdir/igb_uio.ko

# Please also note that this script is not intended to be comprehensive or production quality.

# It supports configuring a single card (the Intel QAT 8970) for use with the SPDK

	exit 1

fi

reload_intel_qat

# try starting the qat service. If this doesn't work, just treat it as a warning for now.

if ! service qat_service start; then

	echo "failed to start the qat service. Something may be wrong with your 01.org driver."