#!/sbin/runscript
# read this article to know what to do
# http://gentoo.org/doc/en/articles/hardware-stability-p2.xml#doc_chap3_pre2

# report bugs to: http://bugs.gentoo.org/show_bug.cgi?id=173347

depend() {
	before bootmisc hdparm
}

checkconfig() {
	if [ ! -f /etc/conf.d/pciparm ]; then
		ewarn "/etc/conf.d/pciparm does not exist, skipping"
		return 1
	fi

	if [ -z "${PCIPARM_BUS_0}" -a  -z "${PCIPARM_VENDOR_0}" ]; then
		ewarn "PCIPARM_BUS_0 or PCIPARM_VENDOR_0 not set in /etc/conf.d/pciparm, skipping"
		return 1
	fi
}

do_setpci() {
	#ewarn "do_setpci: /usr/sbin/setpci $SETPCI_OPT $@"
	SWITCH=$1
	if [ "$SWITCH" = "-d" ]; then
		DESC="(vendor)"
	else
		DESC="(bus)"
	fi
	shift
	SPEC_ID=$1
	shift
	ebegin "Setting PCI params for $DESC $SPEC_ID to $@"
	/usr/sbin/setpci $SETPCI_OPT $SWITCH $SPEC_ID $@
	eend $?
	SWITCH=""
	SPEC_ID=""
}

start() {
	if get_bootparam "nopciparm" ; then
		ewarn "Skipping pciparm init as requested in kernel cmdline"
		return 0
	fi

	checkconfig || return 1
	
	SETPCI_OPT=""
	if [ "$VERBOSE" = "yes" ]; then
		SETPCI_OPT="$SETPCI_OPT -v"
	fi

	if [ -n "$PCIPARM_ALL" ]; then
		do_setpci -d '*:*' $PCIPARM_ALL
	fi
	SEQ_BUS=0
	while true; do
		BUS_OPT=`eval echo '$'PCIPARM_BUS_${SEQ_BUS}`
		if [ -z "$BUS_OPT" ]; then
			break
		fi
		do_setpci -s $BUS_OPT
		SEQ_BUS=$(($SEQ_BUS+1))
	done
	SEQ_VENDOR=0
	while true; do
		VENDOR_OPT=`eval echo '$'PCIPARM_VENDOR_${SEQ_VENDOR}`
		if [ -z "$VENDOR_OPT" ]; then
			break
		fi
		do_setpci -d $VENDOR_OPT
		SEQ_VENDOR=$(($SEQ_VENDOR+1))
	done
}