#=============================================================================
# Copyright (c) 2021 Qualcomm Technologies, Inc.
# All Rights Reserved.
# Confidential and Proprietary - Qualcomm Technologies, Inc.
#
# Copyright (c) 2012-2013, 2016-2020, The Linux Foundation. All rights reserved.
#
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# 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.
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#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
# 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
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# 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.
#=============================================================================

function configure_zram_parameters() {
	MemTotalStr=`cat /proc/meminfo | grep MemTotal`
	MemTotal=${MemTotalStr:16:8}

	# Zram disk - 75% for < 2GB devices .
	# For >2GB devices, size = 50% of RAM size. Limit the size to 4GB.

	let RamSizeGB="( $MemTotal / 1048576 ) + 1"
	diskSizeUnit=M
	if [ $RamSizeGB -le 2 ]; then
		let zRamSizeMB="( $RamSizeGB * 1024 ) * 3 / 4"
	else
		let zRamSizeMB="( $RamSizeGB * 1024 ) / 2"
	fi

	# use MB avoid 32 bit overflow
	if [ $zRamSizeMB -gt 4096 ]; then
		let zRamSizeMB=4096
	fi

	if [ -f /sys/block/zram0/disksize ]; then
		if [ -f /sys/block/zram0/use_dedup ]; then
			echo 1 > /sys/block/zram0/use_dedup
		fi
		echo "$zRamSizeMB""$diskSizeUnit" > /sys/block/zram0/disksize

		# ZRAM may use more memory than it saves if SLAB_STORE_USER
		# debug option is enabled.
		if [ -e /sys/kernel/slab/zs_handle ]; then
			echo 0 > /sys/kernel/slab/zs_handle/store_user
		fi
		if [ -e /sys/kernel/slab/zspage ]; then
			echo 0 > /sys/kernel/slab/zspage/store_user
		fi

		mkswap /dev/block/zram0
		swapon /dev/block/zram0 -p 32758
	fi
}

function configure_read_ahead_kb_values() {
	MemTotalStr=`cat /proc/meminfo | grep MemTotal`
	MemTotal=${MemTotalStr:16:8}

	dmpts=$(ls /sys/block/*/queue/read_ahead_kb | grep -e dm -e mmc)

	# Set 128 for <= 3GB &
	# set 512 for >= 4GB targets.
	if [ $MemTotal -le 3145728 ]; then
		ra_kb=128
	else
		ra_kb=512
	fi
	if [ -f /sys/block/mmcblk0/bdi/read_ahead_kb ]; then
		echo $ra_kb > /sys/block/mmcblk0/bdi/read_ahead_kb
	fi
	if [ -f /sys/block/mmcblk0rpmb/bdi/read_ahead_kb ]; then
		echo $ra_kb > /sys/block/mmcblk0rpmb/bdi/read_ahead_kb
	fi
	for dm in $dmpts; do
		echo $ra_kb > $dm
	done
}

function configure_memory_parameters() {
	MemTotalStr=`cat /proc/meminfo | grep MemTotal`
	MemTotal=${MemTotalStr:16:8}
	# Set Memory parameters.

	# Set swappiness to 100 for all targets
	echo 100 > /proc/sys/vm/swappiness

	# Disable wsf for all targets beacause we are using efk.
	# wsf Range : 1..1000 So set to bare minimum value 1.
	echo 1 > /proc/sys/vm/watermark_scale_factor
	# Disable the feature of watermark boost for 8G and below device
	if [ $MemTotal -le 8388608 ]; then
		echo 0 > /proc/sys/vm/watermark_boost_factor
	fi
	configure_zram_parameters
	configure_read_ahead_kb_values

	#Spawn 2 kswapd threads which can help in fast reclaiming of pages
	echo 2 > /proc/sys/vm/kswapd_threads
}

# Core control parameters for silver
echo 0 0 0 0 1 1 > /sys/devices/system/cpu/cpu0/core_ctl/not_preferred
echo 4 > /sys/devices/system/cpu/cpu0/core_ctl/min_cpus
echo 60 > /sys/devices/system/cpu/cpu0/core_ctl/busy_up_thres
echo 40 > /sys/devices/system/cpu/cpu0/core_ctl/busy_down_thres
echo 100 > /sys/devices/system/cpu/cpu0/core_ctl/offline_delay_ms
echo 8 > /sys/devices/system/cpu/cpu0/core_ctl/task_thres

# Enable Core control for Silver
echo 1 > /sys/devices/system/cpu/cpu0/core_ctl/enable

# Disable Core control on gold
echo 0 > /sys/devices/system/cpu/cpu6/core_ctl/enable

# Setting b.L scheduler parameters
echo 65 > /proc/sys/kernel/sched_downmigrate
echo 71 > /proc/sys/kernel/sched_upmigrate
echo 85 > /proc/sys/kernel/sched_group_downmigrate
echo 100 > /proc/sys/kernel/sched_group_upmigrate
echo 1 > /proc/sys/kernel/sched_walt_rotate_big_tasks
echo 0 > /proc/sys/kernel/sched_coloc_busy_hysteresis_enable_cpus
echo 0 > /proc/sys/kernel/sched_busy_hysteresis_enable_cpus
echo 5 > /proc/sys/kernel/sched_ravg_window_nr_ticks

# disable unfiltering
echo 20000000 > /proc/sys/kernel/sched_task_unfilter_period

# cpuset parameters
echo 0-2     > /dev/cpuset/background/cpus
echo 0-3     > /dev/cpuset/system-background/cpus
echo 4-7     > /dev/cpuset/foreground/boost/cpus
echo 0-2,4-7 > /dev/cpuset/foreground/cpus
echo 0-7     > /dev/cpuset/top-app/cpus

# Turn off scheduler boost at the end
echo 0 > /proc/sys/kernel/sched_boost

# configure governor settings for silver cluster
echo "schedutil" > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo 0 > /sys/devices/system/cpu/cpufreq/policy0/schedutil/down_rate_limit_us
echo 0 > /sys/devices/system/cpu/cpufreq/policy0/schedutil/up_rate_limit_us
echo 1113600 > /sys/devices/system/cpu/cpufreq/policy0/schedutil/hispeed_freq
echo 576000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq

# configure governor settings for gold cluster
echo "schedutil" > /sys/devices/system/cpu/cpufreq/policy6/scaling_governor
echo 0 > /sys/devices/system/cpu/cpufreq/policy6/schedutil/down_rate_limit_us
echo 0 > /sys/devices/system/cpu/cpufreq/policy6/schedutil/up_rate_limit_us
echo 1228800 > /sys/devices/system/cpu/cpufreq/policy6/schedutil/hispeed_freq
echo 691200 > /sys/devices/system/cpu/cpufreq/policy6/scaling_min_freq

# Colocation V3 settings
echo 680000 > /sys/devices/system/cpu/cpufreq/policy0/schedutil/rtg_boost_freq
echo 0 > /sys/devices/system/cpu/cpufreq/policy6/schedutil/rtg_boost_freq
echo 51 > /proc/sys/kernel/sched_min_task_util_for_boost
echo 35 > /proc/sys/kernel/sched_min_task_util_for_colocation

# sched_load_boost as -6 is equivalent to target load as 85. It is per cpu tunable.
echo -6 > /sys/devices/system/cpu/cpu6/sched_load_boost
echo -6 > /sys/devices/system/cpu/cpu7/sched_load_boost
echo 85 > /sys/devices/system/cpu/cpufreq/policy6/schedutil/hispeed_load

# configure input boost settings
echo "0:1804800" > /sys/devices/system/cpu/cpu_boost/input_boost_freq
echo 120 > /sys/devices/system/cpu/cpu_boost/input_boost_ms

# Enable bus-dcvs
for device in /sys/devices/platform/soc
do
	for cpubw in $device/*cpu-cpu-ddr-bw/devfreq/*cpu-cpu-ddr-bw
	do
		cat $cpubw/available_frequencies | cut -d " " -f 1 > $cpubw/min_freq
		echo "bw_hwmon" > $cpubw/governor
		echo "762 1144 1720 2086 2597 2929 3879 5161 5931 6881 7980" > $cpubw/bw_hwmon/mbps_zones
		echo 4 > $cpubw/bw_hwmon/sample_ms
		echo 68 > $cpubw/bw_hwmon/io_percent
		echo 20 > $cpubw/bw_hwmon/hist_memory
		echo 0 > $cpubw/bw_hwmon/hyst_length
		echo 80 > $cpubw/bw_hwmon/down_thres
		echo 0 > $cpubw/bw_hwmon/guard_band_mbps
		echo 250 > $cpubw/bw_hwmon/up_scale
		echo 1600 > $cpubw/bw_hwmon/idle_mbps
		echo 40 > $cpubw/polling_interval
	done

	# configure compute settings for silver latfloor
	for latfloor in $device/*cpu0-cpu*latfloor/devfreq/*cpu0-cpu*latfloor
	do
		cat $latfloor/available_frequencies | cut -d " " -f 1 > $latfloor/min_freq
		echo 8 > $latfloor/polling_interval
	done

	# configure compute settings for gold latfloor
	for latfloor in $device/*cpu6-cpu*latfloor/devfreq/*cpu6-cpu*latfloor
	do
		cat $latfloor/available_frequencies | cut -d " " -f 1 > $latfloor/min_freq
		echo 8 > $latfloor/polling_interval
	done

	# configure mem_latency settings for DDR scaling
	for memlat in $device/*lat/devfreq/*lat
	do
		cat $memlat/available_frequencies | cut -d " " -f 1 > $memlat/min_freq
		echo 8 > $memlat/polling_interval
		echo 400 > $memlat/mem_latency/ratio_ceil
	done

	#Gold CPU6 L3 ratio ceil
	for l3gold in $device/*cpu6-cpu-l3-lat/devfreq/*cpu6-cpu-l3-lat
	do
		echo 4000 > $l3gold/mem_latency/ratio_ceil
		echo 25000 > $l3gold/mem_latency/wb_filter_ratio
		echo 60 > $l3gold/mem_latency/wb_pct_thres
	done

	#Gold CPU7 L3 ratio ceil
	for l3gold in $device/*cpu7-cpu-l3-lat/devfreq/*cpu7-cpu-l3-lat
	do
		echo 4000 > $l3gold/mem_latency/ratio_ceil
		echo 25000 > $l3gold/mem_latency/wb_filter_ratio
		echo 60 > $l3gold/mem_latency/wb_pct_thres
	done

done

echo N > /sys/module/lpm_levels/parameters/sleep_disabled

configure_memory_parameters

setprop vendor.post_boot.parsed 1