#! /bin/bash

#   BSD LICENSE
#
#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
#   All rights reserved.
#
#   Redistribution and use in source and binary forms, with or without
#   modification, are permitted provided that the following conditions
#   are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in
#       the documentation and/or other materials provided with the
#       distribution.
#     * Neither the name of Intel Corporation nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#
# Run with "source /path/to/setup.sh"
#

#
# Change to DPDK directory ( <this-script's-dir>/.. ), and export it as RTE_SDK
#
cd $(dirname ${BASH_SOURCE[0]})/..
export RTE_SDK=$PWD
echo "------------------------------------------------------------------------------"
echo " RTE_SDK exported as $RTE_SDK"
echo "------------------------------------------------------------------------------"

#
# Application EAL parameters for setting memory options (amount/channels/ranks).
#
EAL_PARAMS='-n 4'

#
# Sets QUIT variable so script will finish.
#
quit()
{
	QUIT=$1
}

# Shortcut for quit.
q()
{
	quit
}

#
# Sets up environmental variables for ICC.
#
setup_icc()
{
	DEFAULT_PATH=/opt/intel/bin/iccvars.sh
	param=$1
	shpath=`which iccvars.sh 2> /dev/null`
	if [ $? -eq 0 ] ; then
		echo "Loading iccvars.sh from $shpath for $param"
		source $shpath $param
	elif [ -f $DEFAULT_PATH ] ; then
		echo "Loading iccvars.sh from $DEFAULT_PATH for $param"
		source $DEFAULT_PATH $param
	else
		echo "## ERROR: cannot find 'iccvars.sh' script to set up ICC."
		echo "##     To fix, please add the directory that contains"
		echo "##     iccvars.sh  to your 'PATH' environment variable."
		quit
	fi
}

#
# Sets RTE_TARGET and does a "make install".
#
setup_target()
{
	option=$1
	export RTE_TARGET=${TARGETS[option]}

	compiler=${RTE_TARGET##*-}
	if [ "$compiler" == "icc" ] ; then
		platform=${RTE_TARGET%%-*}
		if [ "$platform" == "x86_64" ] ; then
			setup_icc intel64
		else
			setup_icc ia32
		fi
	fi
	if [ "$QUIT" == "0" ] ; then
		make install T=${RTE_TARGET}
	fi
	echo "------------------------------------------------------------------------------"
	echo " RTE_TARGET exported as $RTE_TARGET"
	echo "------------------------------------------------------------------------------"
}

#
# Creates hugepage filesystem.
#
create_mnt_huge()
{
	echo "Creating /mnt/huge and mounting as hugetlbfs"
	sudo mkdir -p /mnt/huge

	grep -s '/mnt/huge' /proc/mounts > /dev/null
	if [ $? -ne 0 ] ; then
		sudo mount -t hugetlbfs nodev /mnt/huge
	fi
}

#
# Removes hugepage filesystem.
#
remove_mnt_huge()
{
	echo "Unmounting /mnt/huge and removing directory"
	grep -s '/mnt/huge' /proc/mounts > /dev/null
	if [ $? -eq 0 ] ; then
		sudo umount /mnt/huge
	fi

	if [ -d /mnt/huge ] ; then
		sudo rm -R /mnt/huge
	fi
}

#
# Unloads igb_uio.ko.
#
remove_igb_uio_module()
{
	echo "Unloading any existing DPDK UIO module"
	/sbin/lsmod | grep -s igb_uio > /dev/null
	if [ $? -eq 0 ] ; then
		sudo /sbin/rmmod igb_uio
	fi
}

#
# Loads new igb_uio.ko (and uio module if needed).
#
load_igb_uio_module()
{
	if [ ! -f $RTE_SDK/$RTE_TARGET/kmod/igb_uio.ko ];then
		echo "## ERROR: Target does not have the DPDK UIO Kernel Module."
		echo "       To fix, please try to rebuild target."
		return
	fi

	remove_igb_uio_module

	/sbin/lsmod | grep -s uio > /dev/null
	if [ $? -ne 0 ] ; then
		modinfo uio > /dev/null
		if [ $? -eq 0 ]; then
			echo "Loading uio module"
			sudo /sbin/modprobe uio
		fi
	fi

	# UIO may be compiled into kernel, so it may not be an error if it can't
	# be loaded.

	echo "Loading DPDK UIO module"
	sudo /sbin/insmod $RTE_SDK/$RTE_TARGET/kmod/igb_uio.ko
	if [ $? -ne 0 ] ; then
		echo "## ERROR: Could not load kmod/igb_uio.ko."
		quit
	fi
}

#
# Unloads VFIO modules.
#
remove_vfio_module()
{
	echo "Unloading any existing VFIO module"
	/sbin/lsmod | grep -s vfio > /dev/null
	if [ $? -eq 0 ] ; then
		sudo /sbin/rmmod vfio-pci
		sudo /sbin/rmmod vfio_iommu_type1
		sudo /sbin/rmmod vfio
	fi
}

#
# Loads new vfio-pci (and vfio module if needed).
#
load_vfio_module()
{
	remove_vfio_module

	VFIO_PATH="kernel/drivers/vfio/pci/vfio-pci.ko"

	echo "Loading VFIO module"
	/sbin/lsmod | grep -s vfio_pci > /dev/null
	if [ $? -ne 0 ] ; then
		if [ -f /lib/modules/$(uname -r)/$VFIO_PATH ] ; then
			sudo /sbin/modprobe vfio-pci
		fi
	fi

	# make sure regular users can read /dev/vfio
	echo "chmod /dev/vfio"
	sudo chmod a+x /dev/vfio
	if [ $? -ne 0 ] ; then
		echo "FAIL"
		quit
	fi
	echo "OK"

	# check if /dev/vfio/vfio exists - that way we
	# know we either loaded the module, or it was
	# compiled into the kernel
	if [ ! -e /dev/vfio/vfio ] ; then
		echo "## ERROR: VFIO not found!"
	fi
}

#
# Unloads the rte_kni.ko module.
#
remove_kni_module()
{
	echo "Unloading any existing DPDK KNI module"
	/sbin/lsmod | grep -s rte_kni > /dev/null
	if [ $? -eq 0 ] ; then
		sudo /sbin/rmmod rte_kni
	fi
}

#
# Loads the rte_kni.ko module.
#
load_kni_module()
{
    # Check that the KNI module is already built.
	if [ ! -f $RTE_SDK/$RTE_TARGET/kmod/rte_kni.ko ];then
		echo "## ERROR: Target does not have the DPDK KNI Module."
		echo "       To fix, please try to rebuild target."
		return
	fi

    # Unload existing version if present.
	remove_kni_module

    # Now try load the KNI module.
	echo "Loading DPDK KNI module"
	sudo /sbin/insmod $RTE_SDK/$RTE_TARGET/kmod/rte_kni.ko
	if [ $? -ne 0 ] ; then
		echo "## ERROR: Could not load kmod/rte_kni.ko."
		quit
	fi
}

#
# Sets appropriate permissions on /dev/vfio/* files
#
set_vfio_permissions()
{
	# make sure regular users can read /dev/vfio
	echo "chmod /dev/vfio"
	sudo chmod a+x /dev/vfio
	if [ $? -ne 0 ] ; then
		echo "FAIL"
		quit
	fi
	echo "OK"

	# make sure regular user can access everything inside /dev/vfio
	echo "chmod /dev/vfio/*"
	sudo chmod 0666 /dev/vfio/*
	if [ $? -ne 0 ] ; then
		echo "FAIL"
		quit
	fi
	echo "OK"

	# since permissions are only to be set when running as
	# regular user, we only check ulimit here
	#
	# warn if regular user is only allowed
	# to memlock <64M of memory
	MEMLOCK_AMNT=`ulimit -l`

	if [ "$MEMLOCK_AMNT" != "unlimited" ] ; then
		MEMLOCK_MB=`expr $MEMLOCK_AMNT / 1024`
		echo ""
		echo "Current user memlock limit: ${MEMLOCK_MB} MB"
		echo ""
		echo "This is the maximum amount of memory you will be"
		echo "able to use with DPDK and VFIO if run as current user."
		echo -n "To change this, please adjust limits.conf memlock "
		echo "limit for current user."

		if [ $MEMLOCK_AMNT -lt 65536 ] ; then
			echo ""
			echo "## WARNING: memlock limit is less than 64MB"
			echo -n "## DPDK with VFIO may not be able to initialize "
			echo "if run as current user."
		fi
	fi
}

#
# Removes all reserved hugepages.
#
clear_huge_pages()
{
	echo > .echo_tmp
	for d in /sys/devices/system/node/node? ; do
		echo "echo 0 > $d/hugepages/hugepages-2048kB/nr_hugepages" >> .echo_tmp
	done
	echo "Removing currently reserved hugepages"
	sudo sh .echo_tmp
	rm -f .echo_tmp

	remove_mnt_huge
}

#
# Creates hugepages.
#
set_non_numa_pages()
{
	clear_huge_pages

	echo ""
	echo "  Input the number of 2MB pages"
	echo "  Example: to have 128MB of hugepages available, enter '64' to"
	echo "  reserve 64 * 2MB pages"
	echo -n "Number of pages: "
	read Pages

	echo "echo $Pages > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages" > .echo_tmp

	echo "Reserving hugepages"
	sudo sh .echo_tmp
	rm -f .echo_tmp

	create_mnt_huge
}

#
# Creates hugepages on specific NUMA nodes.
#
set_numa_pages()
{
	clear_huge_pages

	echo ""
	echo "  Input the number of 2MB pages for each node"
	echo "  Example: to have 128MB of hugepages available per node,"
	echo "  enter '64' to reserve 64 * 2MB pages on each node"

	echo > .echo_tmp
	for d in /sys/devices/system/node/node? ; do
		node=$(basename $d)
		echo -n "Number of pages for $node: "
		read Pages
		echo "echo $Pages > $d/hugepages/hugepages-2048kB/nr_hugepages" >> .echo_tmp
	done
	echo "Reserving hugepages"
	sudo sh .echo_tmp
	rm -f .echo_tmp

	create_mnt_huge
}

#
# Run unit test application.
#
run_test_app()
{
	echo ""
	echo "  Enter hex bitmask of cores to execute test app on"
	echo "  Example: to execute app on cores 0 to 7, enter 0xff"
	echo -n "bitmask: "
	read Bitmask
	echo "Launching app"
	sudo ${RTE_TARGET}/app/test -c $Bitmask $EAL_PARAMS
}

#
# Run unit testpmd application.
#
run_testpmd_app()
{
	echo ""
	echo "  Enter hex bitmask of cores to execute testpmd app on"
	echo "  Example: to execute app on cores 0 to 7, enter 0xff"
	echo -n "bitmask: "
	read Bitmask
	echo "Launching app"
	sudo ${RTE_TARGET}/app/testpmd -c $Bitmask $EAL_PARAMS -- -i
}

#
# Print hugepage information.
#
grep_meminfo()
{
	grep -i huge /proc/meminfo
}

#
# Calls dpdk_nic_bind.py --status to show the NIC and what they
# are all bound to, in terms of drivers.
#
show_nics()
{
	if  /sbin/lsmod | grep -q -e igb_uio -e vfio_pci; then
		${RTE_SDK}/tools/dpdk_nic_bind.py --status
	else
		echo "# Please load the 'igb_uio' or 'vfio-pci' kernel module before "
		echo "# querying or adjusting NIC device bindings"
	fi
}

#
# Uses dpdk_nic_bind.py to move devices to work with vfio-pci
#
bind_nics_to_vfio()
{
	if /sbin/lsmod  | grep -q vfio_pci ; then
		${RTE_SDK}/tools/dpdk_nic_bind.py --status
		echo ""
		echo -n "Enter PCI address of device to bind to VFIO driver: "
		read PCI_PATH
		sudo ${RTE_SDK}/tools/dpdk_nic_bind.py -b vfio-pci $PCI_PATH &&
			echo "OK"
	else
		echo "# Please load the 'vfio-pci' kernel module before querying or "
		echo "# adjusting NIC device bindings"
	fi
}

#
# Uses dpdk_nic_bind.py to move devices to work with igb_uio
#
bind_nics_to_igb_uio()
{
	if  /sbin/lsmod  | grep -q igb_uio ; then
		${RTE_SDK}/tools/dpdk_nic_bind.py --status
		echo ""
		echo -n "Enter PCI address of device to bind to IGB UIO driver: "
		read PCI_PATH
		sudo ${RTE_SDK}/tools/dpdk_nic_bind.py -b igb_uio $PCI_PATH && echo "OK"
	else
		echo "# Please load the 'igb_uio' kernel module before querying or "
		echo "# adjusting NIC device bindings"
	fi
}

#
# Uses dpdk_nic_bind.py to move devices to work with kernel drivers again
#
unbind_nics()
{
	${RTE_SDK}/tools/dpdk_nic_bind.py --status
	echo ""
	echo -n "Enter PCI address of device to unbind: "
	read PCI_PATH
	echo ""
	echo -n "Enter name of kernel driver to bind the device to: "
	read DRV
	sudo ${RTE_SDK}/tools/dpdk_nic_bind.py -b $DRV $PCI_PATH && echo "OK"
}

#
# Options for building a target. Note that this step MUST be first as it sets
# up TARGETS[] starting from 1, and this is accessed in setup_target using the
# user entered option.
#
step1_func()
{
	TITLE="Select the DPDK environment to build"
	CONFIG_NUM=1
	for cfg in config/defconfig_* ; do
		cfg=${cfg/config\/defconfig_/}
		TEXT[$CONFIG_NUM]="$cfg"
		TARGETS[$CONFIG_NUM]=$cfg
		FUNC[$CONFIG_NUM]="setup_target"
		let "CONFIG_NUM+=1"
	done
}

#
# Options for setting up environment.
#
step2_func()
{
	TITLE="Setup linuxapp environment"

	TEXT[1]="Insert IGB UIO module"
	FUNC[1]="load_igb_uio_module"

	TEXT[2]="Insert VFIO module"
	FUNC[2]="load_vfio_module"

	TEXT[3]="Insert KNI module"
	FUNC[3]="load_kni_module"

	TEXT[4]="Setup hugepage mappings for non-NUMA systems"
	FUNC[4]="set_non_numa_pages"

	TEXT[5]="Setup hugepage mappings for NUMA systems"
	FUNC[5]="set_numa_pages"

	TEXT[6]="Display current Ethernet device settings"
	FUNC[6]="show_nics"

	TEXT[7]="Bind Ethernet device to IGB UIO module"
	FUNC[7]="bind_nics_to_igb_uio"

	TEXT[8]="Bind Ethernet device to VFIO module"
	FUNC[8]="bind_nics_to_vfio"

	TEXT[9]="Setup VFIO permissions"
	FUNC[9]="set_vfio_permissions"
}

#
# Options for running applications.
#
step3_func()
{
	TITLE="Run test application for linuxapp environment"

	TEXT[1]="Run test application (\$RTE_TARGET/app/test)"
	FUNC[1]="run_test_app"

	TEXT[2]="Run testpmd application in interactive mode (\$RTE_TARGET/app/testpmd)"
	FUNC[2]="run_testpmd_app"
}

#
# Other options
#
step4_func()
{
	TITLE="Other tools"

	TEXT[1]="List hugepage info from /proc/meminfo"
	FUNC[1]="grep_meminfo"

}

#
# Options for cleaning up the system
#
step5_func()
{
	TITLE="Uninstall and system cleanup"

	TEXT[1]="Unbind NICs from IGB UIO or VFIO driver"
	FUNC[1]="unbind_nics"

	TEXT[2]="Remove IGB UIO module"
	FUNC[2]="remove_igb_uio_module"

	TEXT[3]="Remove VFIO module"
	FUNC[3]="remove_vfio_module"

	TEXT[4]="Remove KNI module"
	FUNC[4]="remove_kni_module"

	TEXT[5]="Remove hugepage mappings"
	FUNC[5]="clear_huge_pages"
}

STEPS[1]="step1_func"
STEPS[2]="step2_func"
STEPS[3]="step3_func"
STEPS[4]="step4_func"
STEPS[5]="step5_func"

QUIT=0

while [ "$QUIT" == "0" ]; do
	OPTION_NUM=1

	for s in $(seq ${#STEPS[@]}) ; do
		${STEPS[s]}

		echo "----------------------------------------------------------"
		echo " Step $s: ${TITLE}"
		echo "----------------------------------------------------------"

		for i in $(seq ${#TEXT[@]}) ; do
			echo "[$OPTION_NUM] ${TEXT[i]}"
			OPTIONS[$OPTION_NUM]=${FUNC[i]}
			let "OPTION_NUM+=1"
		done

		# Clear TEXT and FUNC arrays before next step
		unset TEXT
		unset FUNC

		echo ""
	done

	echo "[$OPTION_NUM] Exit Script"
	OPTIONS[$OPTION_NUM]="quit"
	echo ""
	echo -n "Option: "
	read our_entry
	echo ""
	${OPTIONS[our_entry]} ${our_entry}

	if [ "$QUIT" == "0" ] ; then
		echo
		echo -n "Press enter to continue ..."; read
	fi

done