#!/bin/sh

. /lib/functions.sh

config_load mtkhnat
config_get enable global enable 0
config_get hqos global hqos 0
config_get txq_num global txq_num 16
config_get scheduling global scheduling "wrr"
config_get sch0_bw global sch0_bw 100000
config_get sch1_bw global sch1_bw 100000

# disable bridge netfilter module to avoid high cpu usage
echo 0 > /proc/sys/net/bridge/bridge-nf-call-arptables
echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables
echo 0 > /proc/sys/net/bridge/bridge-nf-call-ip6tables
echo 0 > /proc/sys/net/bridge/bridge-nf-filter-pppoe-tagged
echo 0 > /proc/sys/net/bridge/bridge-nf-filter-vlan-tagged
echo 0 > /proc/sys/net/bridge/bridge-nf-pass-vlan-input-dev

#if hnat is not exist, switch module to mtk_ppe
module=hnat
[ -d /sys/kernel/debug/${module} ] || {
	module=mtk_ppe
	echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
	echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables
}

#if enable=0, disable qdma_sch & qdma_txq
[ "${enable}" -eq 1 ] || {
	echo 0 ${scheduling} ${sch0_bw} > /sys/kernel/debug/${module}/qdma_sch0
	echo 0 ${scheduling} ${sch1_bw} > /sys/kernel/debug/${module}/qdma_sch1
	echo 0 0 0 0 0 0 4 > /sys/kernel/debug/${module}/qdma_txq0
	for i in $(seq 1 $((txq_num - 1)))
	do
		echo 0 0 0 0 0 0 0 > /sys/kernel/debug/${module}/qdma_txq$i
	done

	rmmod mtkhnat
	exit 0
}

insmod mtkhnat

#if hqos=0, disable qdma_sch & qdma_txq
[ "${hqos}" -eq 1 ] || {
	echo 0 ${scheduling} ${sch0_bw} > /sys/kernel/debug/${module}/qdma_sch0
	echo 0 ${scheduling} ${sch1_bw} > /sys/kernel/debug/${module}/qdma_sch1

	for i in $(seq 0 $((txq_num - 1)))
	do
		if [ "${i}" -le $(((txq_num / 2) - 1)) ]; then
			echo 0 0 0 0 0 0 4 > /sys/kernel/debug/${module}/qdma_txq$i
		else
			echo 1 0 0 0 0 0 4 > /sys/kernel/debug/${module}/qdma_txq$i
		fi
	done

	exit 0
}

# enable qdma_sch0 and qdma_sch1
echo 1 ${scheduling} ${sch0_bw} > /sys/kernel/debug/${module}/qdma_sch0
echo 1 ${scheduling} ${sch1_bw} > /sys/kernel/debug/${module}/qdma_sch1

# enable bridge netfilter module to allow skb being marked
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables

setup_queue() {
	local queue_id queue_scheduler queue_minebl queue_maxebl
	local queue_minrate queue_maxrate queue_resv minrate maxrate queue_weight

	config_get queue_id $1 id 0
	config_get queue_minrate $1 minrate 0
	config_get queue_maxrate $1 maxrate 0
	config_get queue_resv $1 resv 4
	config_get queue_weight $1 weight 4

	# check qid < txq max num or not for loop condition
	[ "${queue_id}" -gt $((txq_num - 1)) ] && return 0

	# start to set per queue config
	queue_minebl=1
	queue_maxebl=1
	queue_scheduler=0

	# if min rate = 0, set min enable = 0
	# if max rate = 0, set max enable = 0
	[ "${queue_minrate}" -eq 0 ] && queue_minebl=0
	[ "${queue_maxrate}" -eq 0 ] && queue_maxebl=0

	# calculate min rate according to sch0_bw
	minrate=$((sch0_bw * $queue_minrate))
	minrate=$((minrate / 100))

	# calculate max rate according to sch0_bw
	maxrate=$((sch0_bw * $queue_maxrate))
	maxrate=$((maxrate / 100))

	# set the queue of sch0 group(the lower half of total queues)
	[ "${queue_id}" -le $(((txq_num / 2) - 1)) ] && \
	echo 0 ${queue_minebl} ${minrate} ${queue_maxebl} ${maxrate} ${queue_weight} \
		${queue_resv} > /sys/kernel/debug/${module}/qdma_txq${queue_id}

	# calculate min rate according to sch1_bw
	minrate=$((sch1_bw * $queue_minrate))
	minrate=$((minrate / 100))

	# calculate max rate according to sch1_bw
	maxrate=$((sch1_bw * $queue_maxrate))
	maxrate=$((maxrate / 100))

	# set the queue of sch1 group(the upper half of total queues)
	[ "${queue_id}" -gt $(((txq_num / 2) - 1)) ] && \
	echo 1 ${queue_minebl} ${minrate} ${queue_maxebl} ${maxrate} ${queue_weight} \
		${queue_resv} > /sys/kernel/debug/${module}/qdma_txq${queue_id}
}

config_foreach setup_queue queue