#!/bin/bash
#################################################################
#
#   BSD LICENSE
# 
#   Copyright(c) 2007-2016 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.
# 
#  version: QAT1.7.Upstream.L.1.0.3-42
#
#################################################################
#
### BEGIN INIT INFO
# Provides: QAT
# Required-Start: $ALL
# Required-Stop:
# Default-Start: 2 3 5
# Default-Stop: 0 1 4 6
# Description:  Intel QAT service
### END INIT INFO
#
# qat_service          Start/Stop the Intel QAT.
#
# chkconfig: 345 99 99
# description: modprobe the QAT modules, which loads dependant \
#       modules, before calling the user space \
#       utility to pass configuration parameters

usage() {
echo
echo --------------------------------------------------------
echo USAGE:
echo --------------------------------------------------------
echo "#  $0 start||stop||status||restart||shutdown"
echo --------------------------------------------------------
echo " Note: If there is more devices in the system"
echo " you can start, stop or restart separate device by "
echo " passing the dev to be restarted or stopped as a"
echo " parameter for instance: "
echo " $0 stop qat_dev<N>"
echo " where N is device number."
echo " To see all devices in the system use:"
echo " $0 status"
echo --------------------------------------------------------
exit 1
}

inventory_the_devices() {
    # dynamically inventory the devices by looking at the pci bus
    # store the total number of each type of device seen
    numDh895xDevicesPF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${DH895_DEVICE_PCI_ID}")
    numDh895xDevicesVF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${DH895_DEVICE_PCI_ID_VM}")
    numC62xDevicesPF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${C62X_DEVICE_PCI_ID}")
    numC62xDevicesVF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${C62X_DEVICE_PCI_ID_VM}")
    numC3xxDevicesPF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${C3XX_DEVICE_PCI_ID}")
    numC3xxDevicesVF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${C3XX_DEVICE_PCI_ID_VM}")
    numD15xxDevicesPF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${D15XX_DEVICE_PCI_ID}")
    numD15xxDevicesVF=$(lspci -n | egrep -c "${INTEL_VENDORID}:${D15XX_DEVICE_PCI_ID_VM}")
}

enable_sriov() {
    PF_LIST=`${ADF_CTL} $1 status | grep -e "^ *qat_dev" | grep -v "vf," | awk '{print $1}'`

    for PF_DEV in ${PF_LIST}
    do
        # Extract the BSF to build the path to /sys/bus/.../sriov)_numvfs
        BSF=`${ADF_CTL} ${PF_DEV} status | tail -1 | awk '{print $8}' | awk 'BEGIN{FS=","}{print $1}'`
        B=`echo ${BSF} | awk 'BEGIN{FS=":"}{print $1}'`
        SF=`echo ${BSF} | awk 'BEGIN{FS=":"}{print $2}'`
        S=`echo ${SF} | awk 'BEGIN{FS="."}{print $1}'`
        F=`echo ${SF} | awk 'BEGIN{FS="."}{print $2}'`
        SYSFS_DIR=/sys/bus/pci/devices/0000:${B}:${S}.${F}

        if [ ! -e ${SYSFS_DIR}/sriov_numvfs ]; then
            echo "Cannot enable SRIOV for ${PF_DEV}. No sriov_numvs file"
            exit 1
        fi

        NUMVFS=`cat ${SYSFS_DIR}/sriov_numvfs`
        if [ ${NUMVFS} != 0 ]; then
            echo "SRIOV is already enabled for ${PF_DEV}"
            exit 1
        fi

        cat ${SYSFS_DIR}/sriov_totalvfs > ${SYSFS_DIR}/sriov_numvfs
        if [ $? != 0 ]; then
            echo "Could not enable SRIOV for ${PF_DEV}"
            exit 1;
        fi

        # Get a list of all the VFs for this PF and bring then down
        VF_LIST=`${ADF_CTL} status | grep "bsf: ${B}" | grep "vf," | awk '{print $1}'`
        for VF_DEV in ${VF_LIST}
        do
            ${ADF_CTL} ${VF_DEV} down
        done
    done

    ${ADF_CTL} up
}

load_the_required_modules() {
    # Using the collected inventory, install the modules.  No harm done if already installed.
    if [ ${numDh895xDevicesPF} != 0 ]; then
        modprobe qat_dh895xcc
    fi
    if [ ${numC62xDevicesPF} != 0 ]; then
        modprobe qat_c62x
    fi
    if [ ${numC3xxDevicesPF} != 0 ]; then
        modprobe qat_c3xxx
    fi
    if [ ${numD15xxDevicesPF} != 0 ]; then
        modprobe qat_d15xx
    fi
    if [ `lsmod | grep "usdm_drv" | wc -l` == "0" ]; then
        modprobe usdm_drv
    fi
    # Loading VF drivers as necessary
    # The VF devices only appear after SRIOV is enabled on the PF,
    #  therefore we can't use lspci to determine that the VF driver should be loaded.
    #  Instead, if we want SRIOV, and we have a specific PF device, then load the driver.
    if [ ${SRIOV_ENABLE} == 1 ]; then
        if [ ${numDh895xDevicesPF} != 0 -o ${numDh895xDevicesVF} != 0 ]; then
            modprobe qat_dh895xccvf
        fi
        if [ ${numC62xDevicesPF} != 0 -o ${numC62xDevicesVF} != 0 ]; then
            modprobe qat_c62xvf
        fi
        if [ ${numC3xxDevicesPF} != 0 -o ${numC3xxDevicesVF} != 0 ]; then
            modprobe qat_c3xxxvf
        fi
        if [ ${numD15xxDevicesPF} != 0 -o ${numD15xxDevicesVF} != 0 ]; then
            modprobe qat_d15xxvf
        fi
    fi
}

copy_in_config_files() {
    local num_devices=${1}
    local device_file_prefix=${2}
    local source_file_suffix="${3}"

    if [ ${num_devices} != 0 ]; then
        for (( dev=0; dev<${num_devices}; dev++ ))
        do
            if [ -e /etc/qat/conf_files/${device_file_prefix}_dev${dev}.conf${source_file_suffix} ]; then
                cp /etc/qat/conf_files/${device_file_prefix}_dev${dev}.conf${source_file_suffix} /etc/${device_file_prefix}_dev${dev}.conf
            else
                echo "QAT: ${device_file_prefix}: using dev0 device config for device ${dev}, settings may be suboptimal"
                cp /etc/qat/conf_files/${device_file_prefix}_dev0.conf${source_file_suffix} /etc/${device_file_prefix}_dev${dev}.conf
            fi
        done
    fi
}

establish_the_device_PF_config_files() {
    copy_in_config_files ${numDh895xDevicesPF} 'dh895xcc' ''
    copy_in_config_files ${numC62xDevicesPF} 'c6xx' ''
    copy_in_config_files ${numC3xxDevicesPF} 'c3xxx' ''
    copy_in_config_files ${numD15xxDevicesPF} 'd15xx' ''
}

establish_the_device_VF_config_files() {
    copy_in_config_files $(( ${numDh895xDevicesPF} * ${QAT_DH895XCC_NUM_VFS} )) 'dh895xccvf' '.vm'
    copy_in_config_files $(( ${numC62xDevicesPF} * ${QAT_DHC62X_NUM_VFS} )) 'c6xxvf' '.vm'
    copy_in_config_files $(( ${numC3xxDevicesPF} * ${QAT_DHC3XXX_NUM_VFS} )) 'c3xxxvf' '.vm'
    copy_in_config_files $(( ${numD15xxDevicesPF} * ${QAT_DHD15XX_NUM_VFS} )) 'd15xxvf' '.vm'
}

establish_the_guest_VF_config_files() {
    copy_in_config_files ${numDh895xDevicesVF} 'dh895xccvf' '.vm'
    copy_in_config_files ${numC62xDevicesVF} 'c6xxvf' '.vm'
    copy_in_config_files ${numC3xxDevicesVF} 'c3xxxvf' '.vm'
    copy_in_config_files ${numD15xxDevicesVF} 'd15xxvf' '.vm'
}

###############  Mainline Begins ################

# Set the SRIOV_ENABLE variable by sourcing the qat file
test -f /etc/default/qat && . /etc/default/qat

INTEL_VENDORID="8086"
DH895_DEVICE_PCI_ID="0435"
DH895_DEVICE_PCI_ID_VM="0443"
C62X_DEVICE_PCI_ID="37c8"
C62X_DEVICE_PCI_ID_VM="37c9"
C3XX_DEVICE_PCI_ID="19e2"
C3XX_DEVICE_PCI_ID_VM="19e3"
D15XX_DEVICE_PCI_ID="6f54"
D15XX_DEVICE_PCI_ID_VM="6f55"

QAT_DH895XCC_NUM_VFS=32
QAT_DHC62X_NUM_VFS=16
QAT_DHD15XX_NUM_VFS=16
QAT_DHC3XXX_NUM_VFS=16

ADF_CTL=/usr/sbin/adf_ctl

inventory_the_devices

case $1 in
  Start|start)

    load_the_required_modules

    # Make sure the devices are off
    ${ADF_CTL} $2 down

    establish_the_device_PF_config_files

    ${ADF_CTL} $2 status | grep -e "^ *qat_dev" | grep -v vf > /dev/null
    if [ $? == 0 ]; then
        PHYS_FUNCTIONS=1
    else
        PHYS_FUNCTIONS=0
    fi
    ${ADF_CTL} $2 status | grep -e "^ *qat_dev" | grep vf > /dev/null
    if [ $? == 0 ]; then
        VIRT_FUNCTIONS=1
    else
        VIRT_FUNCTIONS=0
    fi
    # Check if sriov should be enabled.
    if [ ${SRIOV_ENABLE} == 1 ]; then
        if [ ${PHYS_FUNCTIONS} == 1 ]; then
            # We have physical functions
            DO_ENABLE_SRIOV=1
        else
            # No physical functions
            DO_ENABLE_SRIOV=0
        fi
    else
        DO_ENABLE_SRIOV=0
    fi

    if [ ${DO_ENABLE_SRIOV} == 1 ]; then
        echo "enabling sriov"

        establish_the_device_VF_config_files

        enable_sriov $2
    else
        if [ ${PHYS_FUNCTIONS} == 0 ]; then
            if [ ${VIRT_FUNCTIONS} == 1 ]; then
                establish_the_guest_VF_config_files
            fi
        fi
    fi

    # Turn the devices on
    ${ADF_CTL} $2 up

    # Show device status
    ${ADF_CTL} $2 status
            ;;

 Shutdown|shutdown)
    ${ADF_CTL} down
    modprobe -q -r usdm_drv
    modprobe -q -r qat_dh895xccvf
    modprobe -q -r qat_c62xvf
    modprobe -q -r qat_c3xxxvf
    modprobe -q -r qat_dh895xcc
    modprobe -q -r qat_c62x
    modprobe -q -r qat_c3xxx
    modprobe -q -r qat_d15xx
    modprobe -q -r qat_d15xxvf
    modprobe -q -r intel_qat
            ;;

 Stop|stop)
    ${ADF_CTL} $2 down
            ;;

 Restart|restart)
    ${ADF_CTL} $2 down && ${ADF_CTL} $2 up
            ;;

 Status|status)
    ${ADF_CTL} status
    if [ "$?" -ne 0 ]
    then
        echo "No devices found. Please start the driver using:"
        echo "$0 start"
    fi
            ;;

 *)
      usage
            ;;

esac
exit 0