#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

##############################################################################
# Source library

relative_path="${BASH_SOURCE%/*}"
if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
	relative_path="."
fi

source "$relative_path/lib.sh"

##############################################################################
# Defines

DEVLINK_DEV=$(devlink port show | grep "${NETIFS[p1]}" | \
	      grep -v "${NETIFS[p1]}[0-9]" | cut -d" " -f1 | \
	      rev | cut -d"/" -f2- | rev)
if [ -z "$DEVLINK_DEV" ]; then
	echo "SKIP: ${NETIFS[p1]} has no devlink device registered for it"
	exit 1
fi
if [[ "$(echo $DEVLINK_DEV | grep -c pci)" -eq 0 ]]; then
	echo "SKIP: devlink device's bus is not PCI"
	exit 1
fi

DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
		 -n | cut -d" " -f3)

##############################################################################
# Sanity checks

devlink -j resource show "$DEVLINK_DEV" &> /dev/null
if [ $? -ne 0 ]; then
	echo "SKIP: iproute2 too old, missing devlink resource support"
	exit 1
fi

##############################################################################
# Devlink helpers

devlink_resource_names_to_path()
{
	local resource
	local path=""

	for resource in "${@}"; do
		if [ "$path" == "" ]; then
			path="$resource"
		else
			path="${path}/$resource"
		fi
	done

	echo "$path"
}

devlink_resource_get()
{
	local name=$1
	local resource_name=.[][\"$DEVLINK_DEV\"]

	resource_name="$resource_name | .[] | select (.name == \"$name\")"

	shift
	for resource in "${@}"; do
		resource_name="${resource_name} | .[\"resources\"][] | \
			       select (.name == \"$resource\")"
	done

	devlink -j resource show "$DEVLINK_DEV" | jq "$resource_name"
}

devlink_resource_size_get()
{
	local size=$(devlink_resource_get "$@" | jq '.["size_new"]')

	if [ "$size" == "null" ]; then
		devlink_resource_get "$@" | jq '.["size"]'
	else
		echo "$size"
	fi
}

devlink_resource_size_set()
{
	local new_size=$1
	local path

	shift
	path=$(devlink_resource_names_to_path "$@")
	devlink resource set "$DEVLINK_DEV" path "$path" size "$new_size"
	check_err $? "Failed setting path $path to size $size"
}

devlink_reload()
{
	local still_pending

	devlink dev reload "$DEVLINK_DEV" &> /dev/null
	check_err $? "Failed reload"

	still_pending=$(devlink resource show "$DEVLINK_DEV" | \
			grep -c "size_new")
	check_err $still_pending "Failed reload - There are still unset sizes"

	udevadm settle
}
