# Copyright (c) 2015 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Scripts require non-POSIX parts of bash
SHELL := /bin/bash

DPDK_BUILD_DIR        ?= $(CURDIR)/_build
DPDK_INSTALL_DIR      ?= $(CURDIR)/_install
DPDK_PKTMBUF_HEADROOM ?= 128
DPDK_DOWNLOAD_DIR     ?= $(HOME)/Downloads
DPDK_MARCH            ?= native
DPDK_TUNE             ?= generic
DPDK_DEBUG            ?= n
DPDK_CRYPTO_PMD       ?= n
DPDK_MLX5_PMD         ?= n

B := $(DPDK_BUILD_DIR)
I := $(DPDK_INSTALL_DIR)
DPDK_VERSION ?= 16.11
PKG_SUFFIX ?= vpp1
DPDK_BASE_URL ?= http://fast.dpdk.org/rel
DPDK_TARBALL := dpdk-$(DPDK_VERSION).tar.xz
DPDK_TAR_URL := $(DPDK_BASE_URL)/$(DPDK_TARBALL)
DPDK_16.07_TARBALL_MD5_CKSUM := 690a2bb570103e58d12f9806e8bf21be
DPDK_16.11_TARBALL_MD5_CKSUM := 06c1c577795360719d0b4fafaeee21e9
DPDK_SOURCE := $(B)/dpdk-$(DPDK_VERSION)

ifneq (,$(findstring clang,$(CC)))
DPDK_CC=clang
else
DPDK_CC=gcc
endif


ifeq (,$(DPDK_TARGET))
DPDK_TARGET := x86_64-native-linuxapp-$(DPDK_CC)
endif

JOBS := $(shell grep processor /proc/cpuinfo | wc -l)

# compiler/linker custom arguments
DPDK_CPU_CFLAGS := -pie -fPIC
DPDK_CPU_LDFLAGS :=
DPDK_EXTRA_LDFLAGS := -g

ifeq ($(DPDK_DEBUG),n)
DPDK_EXTRA_CFLAGS := -g -mtune=$(DPDK_TUNE)
else
DPDK_EXTRA_CFLAGS := -g -O0
endif

# translate gcc march values to DPDK arch
ifeq ($(DPDK_MARCH),native)
DPDK_MACHINE:=native                     # autodetect host CPU
else ifeq ($(DPDK_MARCH),corei7)
DPDK_MACHINE:=nhm                        # Nehalem / Westmere
else ifeq ($(DPDK_MARCH),corei7-avx)
DPDK_MACHINE:=snb                        # Sandy Bridge
else ifeq ($(DPDK_MARCH),core-avx-i)
DPDK_MACHINE:=ivb                        # Ivy Bridge
else ifeq ($(DPDK_MARCH),core-avx2)
DPDK_MACHINE:=hsw                        # Haswell
else ifeq ($(DPDK_MARCH),armv7a)
DPDK_MACHINE:=armv7a                     # ARMv7
else ifeq ($(DPDK_MARCH),armv8a)
DPDK_MACHINE:=armv8a                     # ARMv8
else
$(error Unknown DPDK_MARCH)
endif

# assemble DPDK make arguments
DPDK_MAKE_ARGS := -C $(DPDK_SOURCE) -j $(JOBS) \
	T=$(DPDK_TARGET) \
	RTE_CONFIG_TEMPLATE=../custom-config \
	EXTRA_CFLAGS="$(DPDK_EXTRA_CFLAGS)" \
	EXTRA_LDFLAGS="$(DPDK_EXTRA_LDFLAGS)" \
	CPU_CFLAGS="$(DPDK_CPU_CFLAGS)" \
	CPU_LDFLAGS="$(DPDK_CPU_LDFLAGS)" \
	DESTDIR=$(I) \
        $(DPDK_MAKE_EXTRA_ARGS)

DPDK_SOURCE_FILES := $(shell  [ -e $(DPDK_SOURCE) ] && find $(DPDK_SOURCE) -name "*.[chS]")  

define set
@if grep -q CONFIG_$1 $@ ; \
	then sed -i -e 's/.*\(CONFIG_$1=\).*/\1$2/' $@ ; \
	else echo CONFIG_$1=$2 >> $@ ; \
fi
endef

all: build

$(B)/custom-config: $(B)/.patch.ok Makefile
	@echo --- generating custom config from $(DPDK_SOURCE)/config/defconfig_$(DPDK_TARGET) ---
	@cpp -undef -ffreestanding -x assembler-with-cpp $(DPDK_SOURCE)/config/defconfig_$(DPDK_TARGET) $@
	$(call set,RTE_MACHINE,$(DPDK_MACHINE))
	@# modify options
	$(call set,RTE_MAX_LCORE,256)
	$(call set,RTE_PKTMBUF_HEADROOM,$(DPDK_PKTMBUF_HEADROOM))
	$(call set,RTE_LIBEAL_USE_HPET,y)
	$(call set,RTE_BUILD_COMBINE_LIBS,y)
	$(call set,RTE_LIBRTE_I40E_16BYTE_RX_DESC,y)
	$(call set,RTE_PCI_CONFIG,y)
	$(call set,RTE_PCI_EXTENDED_TAG,"on")
	$(call set,RTE_PCI_MAX_READ_REQUEST_SIZE,4096)
	@# enable debug init for device drivers
	$(call set,RTE_LIBRTE_I40E_DEBUG_INIT,$(DPDK_DEBUG))
	$(call set,RTE_LIBRTE_IXGBE_DEBUG_INIT,$(DPDK_DEBUG))
	$(call set,RTE_LIBRTE_E1000_DEBUG_INIT,$(DPDK_DEBUG))
	$(call set,RTE_LIBRTE_VIRTIO_DEBUG_INIT,$(DPDK_DEBUG))
	$(call set,RTE_LIBRTE_VMXNET3_DEBUG_INIT,$(DPDK_DEBUG))
	$(call set,RTE_LIBRTE_PMD_BOND,y)
	$(call set,RTE_LIBRTE_IP_FRAG,y)
	$(call set,RTE_LIBRTE_PMD_AESNI_MB,$(DPDK_CRYPTO_PMD))
	$(call set,RTE_LIBRTE_PMD_AESNI_GCM,$(DPDK_CRYPTO_PMD))
	$(call set,RTE_LIBRTE_PMD_QAT,$(DPDK_CRYPTO_PMD))
	$(call set,RTE_LIBRTE_MLX5_PMD,$(DPDK_MLX5_PMD))
	@# not needed
	$(call set,RTE_LIBRTE_TIMER,n)
	$(call set,RTE_LIBRTE_CFGFILE,n)
	$(call set,RTE_LIBRTE_LPM,n)
	$(call set,RTE_LIBRTE_ACL,n)
	$(call set,RTE_LIBRTE_POWER,n)
	$(call set,RTE_LIBRTE_DISTRIBUTOR,n)
	$(call set,RTE_LIBRTE_REORDER,n)
	$(call set,RTE_LIBRTE_PORT,n)
	$(call set,RTE_LIBRTE_TABLE,n)
	$(call set,RTE_LIBRTE_PIPELINE,n)
	$(call set,RTE_KNI_KMOD,n)
	$(call set,RTE_EAL_IGB_UIO,n)
	@rm -f .config.ok

$(CURDIR)/$(DPDK_TARBALL):
	@if [ -e $(DPDK_DOWNLOAD_DIR)/$(DPDK_TARBALL) ] ; \
		then cp $(DPDK_DOWNLOAD_DIR)/$(DPDK_TARBALL) $(CURDIR) ; \
		else curl -o $(CURDIR)/$(DPDK_TARBALL) -LO $(DPDK_TAR_URL) ; \
	fi
	@rm -f $(B)/.download.ok

$(B)/.download.ok: $(CURDIR)/$(DPDK_TARBALL)
	@mkdir -p $(B)
	@openssl md5 $< | cut -f 2 -d " " - > $(B)/$(DPDK_TARBALL).md5sum
	@([ "$$(<$(B)/$(DPDK_TARBALL).md5sum)" = "$(DPDK_$(DPDK_VERSION)_TARBALL_MD5_CKSUM)" ] || \
	( echo "Bad Checksum! Please remove $< and retry" && \
		rm $(B)/$(DPDK_TARBALL).md5sum && false ))
	@touch $@

.PHONY: download
download: $(B)/.download.ok

$(B)/.extract.ok: $(B)/.download.ok
	@echo --- extracting $(DPDK_TARBALL) ---
	@tar --directory $(B) --extract --file $(CURDIR)/$(DPDK_TARBALL)
	@touch $@

.PHONY: extract
extract: $(B)/.extract.ok

$(B)/.patch.ok: $(B)/.extract.ok
ifneq ($(wildcard $(CURDIR)/dpdk-$(DPDK_VERSION)_patches/*.patch),)
	@echo --- patching ---
	@for f in $(CURDIR)/dpdk-$(DPDK_VERSION)_patches/*.patch ; do \
		echo Applying patch: $$(basename $$f) ; \
		patch -p1 -d $(DPDK_SOURCE) < $$f ; \
	done
endif
	@touch $@

.PHONY: patch
patch: $(B)/.patch.ok

$(B)/.config.ok: $(B)/.patch.ok $(B)/custom-config
	@make $(DPDK_MAKE_ARGS) config
	@touch $@

.PHONY: config
config: $(B)/.config.ok

$(B)/.build.ok: $(DPDK_SOURCE_FILES)
	@if [ ! -e $(B)/.config.ok ] ; then echo 'Please run "make config" first' && false ; fi
	@make $(DPDK_MAKE_ARGS) install
	@touch $@

.PHONY: build
build: $(B)/.build.ok

.PHONY: install
install: $(B)/.build.ok

.PHONY: clean
clean:
	@rm -rf $(B) $(I)

##############################################################################
# .deb packaging
##############################################################################

DEB_ARCH=$(shell dpkg --print-architecture 2> /dev/null)
DEV_DEB=vpp-dpdk-dev_$(DPDK_VERSION)-$(PKG_SUFFIX)_$(DEB_ARCH).deb
INSTALLED_DEB_VER=$(shell dpkg-query --showformat='$${Version}' --show vpp-dpdk-dev 2> /dev/null)

.PHONY: build-deb install-deb check-deb

deb/debian/changelog: Makefile
	@echo "vpp-dpdk ($(DPDK_VERSION)-$(PKG_SUFFIX)) unstable; urgency=low" > $@
	@echo "" >> $@
	@echo "  * DPDK Release $(DPDK_VERSION)" >> $@
	@echo "" >> $@
	@echo " -- VPP Dev <vpp-dev@lists.fd.io>  $(shell date -R)" >> $@

$(DEV_DEB): deb/debian/changelog
	@cd deb && dpkg-buildpackage -b -uc -us
	git clean -fdx deb

build-deb: $(DEV_DEB)

install-deb:
ifneq ($(INSTALLED_DEB_VER),$(DPDK_VERSION)-$(PKG_SUFFIX))
	@make $(DEV_DEB)
	@sudo dpkg -i $(DEV_DEB)
else
	@echo "=========================================================="
	@echo " Up-to-date DPDK package already installed"
	@echo "=========================================================="
endif

check-deb:
ifneq ($(INSTALLED_DEB_VER),$(DPDK_VERSION)-$(PKG_SUFFIX))
	@echo "=========================================================="
	@echo " Outdated DPDK package detected:"
	@echo "  Installed: vpp-dpdk-dev $(INSTALLED_DEB_VER)"
	@echo "  Current:   vpp-dpdk-dev $(DPDK_VERSION)-$(PKG_SUFFIX)"
	@echo ""
	@echo " Please upgrade by invoking 'make dpdk-install-dev'"
	@echo " from the top level directory."
	@echo "=========================================================="
endif

##############################################################################
# .rpm packaging
##############################################################################

RPM_ARCH=$(shell rpm --eval "%{_arch}" 2> /dev/null)
DEV_RPM=vpp-dpdk-devel-$(DPDK_VERSION)-$(PKG_SUFFIX).$(RPM_ARCH).rpm
INSTALLED_RPM_VER=$(shell rpm -q --queryformat '%{VERSION}-%{RELEASE}' vpp-dpdk-devel 2> /dev/null | grep -v "not inst")

.PHONY: build-rpm install-rpm check-rpm

$(DEV_RPM): Makefile rpm/vpp-dpdk.spec
	@rpmbuild -bb \
	  --define "_topdir $(CURDIR)/rpm" \
	  --define "_version $(DPDK_VERSION)" \
	  --define "_release $(PKG_SUFFIX)" \
	  $(CURDIR)/rpm/vpp-dpdk.spec
	mv rpm/RPMS/$(RPM_ARCH)/*.rpm .
	git clean -fdx rpm

build-rpm: $(DEV_RPM)

install-rpm:
ifneq ($(INSTALLED_RPM_VER),$(DPDK_VERSION)-$(PKG_SUFFIX))
	@make $(DEV_RPM)
	sudo rpm -Uih $(DEV_RPM)
else
	@echo "=========================================================="
	@echo " Up-to-date DPDK package already installed"
	@echo "=========================================================="
endif

check-rpm:
ifneq ($(INSTALLED_RPM_VER),$(DPDK_VERSION)-$(PKG_SUFFIX))
	@echo "=========================================================="
	@echo " Outdated DPDK package detected:"
	@echo "  Installed: vpp-dpdk-devel $(INSTALLED_RPM_VER)"
	@echo "  Current:   vpp-dpdk-devel $(DPDK_VERSION)-$(PKG_SUFFIX)"
	@echo ""
	@echo " Please upgrade by invoking 'make dpdk-install-dev'"
	@echo " from the top level directory."
	@echo "=========================================================="
endif

##############################################################################
# ebuild support
##############################################################################

.PHONY: ebuild-build ebuild-install

ebuild-build:
ifeq ($(INSTALLED_DEB_VER)$(INSTALLED_RPM_VER),)
	@echo "=========================================================="
	@echo "Building DPDK from source. Consider installing development"
	@echo "package by invoking 'make dpdk-install-dev' from the"
	@echo "top level directory"
	@echo "=========================================================="
	make config
else
ifneq ($(INSTALLED_DEB_VER),)
	make check-deb
endif
ifneq ($(INSTALLED_RPM_VER),)
	make check-rpm
endif
endif

ebuild-install:
ifeq ($(INSTALLED_DEB_VER)$(INSTALLED_RPM_VER),)
	make install
endif