#mem_alloc_method=0 : MEM=
#mem_alloc_method=1 : BigPhysArea
#mem_alloc_method=2 : Dynamic

# Test passing $(1) to $(CC). If $(CC) succeeds, then echo $(1).
# Copy from https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/utils.mk
TEST_CC_ARG = \
 $(shell $(CC) -c -x c /dev/null -Werror $(1) -o /dev/null > /dev/null 2>&1 && \
   echo $(1))

ifeq ($(ARCH),ARM64)
	ARCH:=arm64
endif

SHELL := /bin/bash

DRIVERNAME = delta-x300

BINARY-OBJS := X3XXDrvBoard.o XDrvBoard.o BufMngr.o DMABufMngr.o DMAMngr.o PropertiesMngr.o ShadowRegisters.o SkelDrv.o CommonBufMngr.o KernelObjectCommon.o SkelProperties.o Stream.o \
StreamProperties.o PCIeBridge_ADVLP.o FPGA_DMAController_ADVLP.o USBufMngr.o ArmUart.o DrvDbg.o EventMngr.o NorFlash.o \
X300DrvBoard.o X320DrvBoard.o X330DrvBoard.o X34XDrvBoard.o X340DrvBoard.o X341DrvBoard.o X350DrvBoard.o X370DrvBoard.o  X370HmiDrvBoard.o X370SdiAsiDrvBoard.o X380DrvBoard.o  \
MailboxMngr.o LowLatencyMngr.o UltimateLowLatencyMngr.o Scp.o X330Drv_NorFlash2Functions.o X34XDrv_NorFlash2Functions.o X3XXDrv_NorFlash2Functions.o \
NorFlash2.o NorFlash2_Manager.o NorFlash2_ComplexOperations.o NorFlash2_BasicOperations.o NorFlash2_Helper.o RegisterWaiter.o \
ConfigurationSpaceMngr.o ClockReconstructionMngr.o DelayedStreamStarterMngr.o SdiDrvBoard.o LtcMngr.o DvDrvBoard.o HpdMngr.o

SRC-OBJS :=  CommonBufMngr_Linux.o DriverAccess.o DriverEntry.o DrvParam.o \
EventMngr_Linux.o KernelObjects.o KernelSysCall.o LinuxAllocator.o LinuxDrvHlp.o USBufMngr_Linux.o KThreadMngr.o InterlockedOp.o DMAMngr_Linux.o KernelTime.o NvidiaP2PWrapper.o 

# default to currently running kernel if KVER not specified
ifeq ($(KVER),)
KVER := $(shell uname -r)
endif

KDIR ?= /lib/modules/$(KVER)/build
INSTALLDIR ?= /lib/modules/$(KVER)
PWD := $(shell pwd)

# Conditionally add -mno-outline-atomics to CFLAGS if it is supported
CONDITIONAL_CFLAGS := $(call TEST_CC_ARG, -mno-outline-atomics)

ifdef mem_alloc_method
EXTRA_CFLAGS += -DMEM_ALLOC_METHOD=$(mem_alloc_method)
endif
EXTRA_CFLAGS += -w -DDBG=0 -DDRIVER
EXTRA_CFLAGS += $(CFLAGS)
EXTRA_CFLAGS += -fno-stack-protector
EXTRA_CFLAGS += -Wno-error=incompatible-pointer-types
EXTRA_CFLAGS += $(CONDITIONAL_CFLAGS)

ifneq ($(KERNELRELEASE),)

obj-m := $(DRIVERNAME).o
$(DRIVERNAME)-objs := $(SRC-OBJS) $(BINARY-OBJS) 

else

ifndef VERBOSE
.SILENT: all
endif

all: default

default:
	
	for file in *.o_shipped; do if ! file "$$file" | grep -q 'ELF'; then xxd -p -r "$$file" > "$${file/.o_shipped/}.c"; fi; done

ifeq ($(ARCH),arm64)
	@trap '$(MAKE) shipped_cleanup' EXIT ; $(MAKE) CROSS_COMPILE=$(CROSS_COMPILE) ARCH=$(ARCH) -C $(KDIR) M=$(PWD) modules
else
	@trap '$(MAKE) shipped_cleanup' EXIT ; $(MAKE) -C $(KDIR) M=$(PWD) modules
endif
	
gencmd:
	for file in $(BINARY-OBJS);do touch .$${file}.cmd; done
	
genbin:
	for file in $(BINARY-OBJS);do echo "X" > $${file/.o/}.o_shipped; done
	
install:
	# Driver installation
	cp $(DRIVERNAME).ko $(INSTALLDIR)/$(DRIVERNAME).ko	
	cp $(DRIVERNAME).rules /etc/udev/$(DRIVERNAME).rules
	if [ ! -f /etc/udev/rules.d/010-$(DRIVERNAME).rules ]; then ln -sf /etc/udev/$(DRIVERNAME).rules /etc/udev/rules.d/010-$(DRIVERNAME).rules; fi
	depmod -a
	modprobe -rq $(DRIVERNAME)
	modprobe $(DRIVERNAME)
	@for files in /dev/$(DRIVERNAME)*; do if [ ! -r files ]; then ( dmesg | grep -i $(DRIVERNAME) ) | grep -i "System needs a restart" -o --colour=always; echo "">NULL; fi; done
		
	# Creating character devices if necessary
	-START_LINE=$$(dmesg | grep -n '=====' | tail -n 1 | sed -E 's/^(.+):.*/\1/') &&\
	dmesg | tail -n +$$START_LINE | grep -i '==MKNOD==' &&\
	rm -rf /dev/delta-x3* &&\
	eval $$(dmesg | tail -n +$$START_LINE | grep -i '==MKNOD==' | sed -E 's/^.*driver name: (.+), board index: (.+), major: (.+)/mknod -m 666 \/dev\/\1\2 c \3 \2 ; /i') ||:

uninstall:
	# Driver uninstallation	
	modprobe -r $(DRIVERNAME)
	rm $(INSTALLDIR)/$(DRIVERNAME).ko
	rm /etc/udev/$(DRIVERNAME).rules	
	rm /etc/udev/rules.d/010-$(DRIVERNAME).rules


shipped_cleanup:
	for file in *.o_shipped; do if ! file "$$file" | grep -q 'ELF'; then rm -f "$${file/.o_shipped/}.c"; fi; done

clean:
	rm -f *.o
	rm -f Module.symvers
	rm -f modules.order
	rm -f *.ko
	
endif
