#
# Makefile for ib_srpt.ko.
#

ifndef PREFIX
	PREFIX=/usr/local
endif

SCST_DIR := $(shell echo "$$PWD")/../scst/src

ifeq ($(KVER),)
  ifeq ($(KDIR),)
    KVER := $(shell uname -r)
    KDIR := /lib/modules/$(KVER)/build
  else
    ifeq ($(KERNELRELEASE),)
      KVER := $(strip $(shell						\
	cat $(KDIR)/include/config/kernel.release 2>/dev/null ||	\
	make -s -C $(KDIR) kernelversion))
    else
      KVER := $(KERNELRELEASE)
    endif
  endif
else
  ifeq ($(KDIR),)
    KDIR := /lib/modules/$(KVER)/build
  endif
endif

ifeq ($(INSTALL_MOD_PATH),)
  export INSTALL_MOD_PATH := $(DESTDIR)
endif

INSTALL_DIR := $(INSTALL_MOD_PATH)/lib/modules/$(KVER)/extra

SRC_FILES=$(wildcard */*.[ch])

# Name of the OFED kernel package.
OFED_KERNEL_IB_RPM:=$(shell for r in mlnx-ofa_kernel compat-rdma kernel-ib; do rpm -q $$r 2>/dev/null | grep -q "^$$r" && echo "$$r" && break; done)
OFED_KERNEL_IB_DEB:=$(shell for p in mlnx-ofed-kernel-dkms mlnx-ofed-kernel-modules; do dpkg-query -s "$$p" >/dev/null 2>&1 && echo "$$p" && break; done)
OFED_KERNEL_IB_PKG:=$(OFED_KERNEL_IB_RPM)$(OFED_KERNEL_IB_DEB)

# Name of the OFED kernel development package.
OFED_KERNEL_IB_DEVEL_RPM:=$(shell for r in mlnx-ofa_kernel-devel compat-rdma-devel kernel-ib-devel; do rpm -q $$r 2>/dev/null | grep -q "^$$r" && echo "$$r" && break; done)
OFED_KERNEL_IB_DEVEL_DEB:=$(shell for p in mlnx-ofed-kernel-dkms mlnx-ofed-kernel-modules; do dpkg-query -s "$$p" >/dev/null 2>&1 && echo "$$p" && break; done)
OFED_KERNEL_IB_DEVEL_PKG:=$(OFED_KERNEL_IB_DEVEL_RPM)$(OFED_KERNEL_IB_DEVEL_DEB)

OFED_FLAVOR=$(shell if [ -e /usr/bin/ofed_info ]; then /usr/bin/ofed_info 2>/dev/null | head -n1 | sed -n 's/^\(MLNX_OFED\|OFED-internal\).*/MOFED/p;s/^OFED-.*/OFED/p'; else echo in-tree; fi)

ifneq ($(OFED_KERNEL_IB_PKG),)
ifeq ($(OFED_KERNEL_IB_PKG),compat-rdma)
# OFED 3.x
OFED_KERNEL_DIR:=/usr/src/compat-rdma
OFED_CFLAGS:=-I$(OFED_KERNEL_DIR)/include
else
ifeq ($(OFED_FLAVOR),MOFED)
# Mellanox OFED with or without kernel-ib RPM. Since several MOFED backport
# header files use the LINUX_BACKPORT() macro without including
# <linux/compat-2.6.h>, include that header file explicitly.
OFED_KERNEL_DIR:=/usr/src/ofa_kernel/default
OFED_RPM_VERS=$(shell rpm -q --qf '%{version}\n' $(OFED_KERNEL_IB_DEVEL_RPM) 2>/dev/null | grep -v ' ')
OFED_DEB_VERS=$(shell dpkg-query -W --showformat='$${Version}\n' $(OFED_KERNEL_IB_DEVEL_DEB) 2>/dev/null)
OFED_VERS=$(OFED_RPM_VERS)$(OFED_DEB_VERS)
OFED_CFLAGS:=-I$(OFED_KERNEL_DIR)/include      \
             -I$(OFED_KERNEL_DIR)/include/uapi \
             -include "linux/compat-2.6.h"
OFED_CFLAGS+=-DMOFED_MAJOR=$(shell echo "$(OFED_VERS)" | sed 's/\([0-9]\+\)[^0-9]\+\([0-9]\+\).*/\1/g')
OFED_CFLAGS+=-DMOFED_MINOR=$(shell echo "$(OFED_VERS)" | sed 's/\([0-9]\+\)[^0-9]\+\([0-9]\+\).*/\2/g')
OFED_CONFIG:=CONFIG_DTRACE=
else
# OFED 1.5
OFED_KERNEL_DIR:=/usr/src/ofa_kernel
include $(OFED_KERNEL_DIR)/config.mk
OFED_CFLAGS:=$(BACKPORT_INCLUDES) -I$(OFED_KERNEL_DIR)/include
endif
endif
# Any OFED version
OFED_MODULE_SYMVERS:=$(OFED_KERNEL_DIR)/Module.symvers
endif

# Use make instead of $(MAKE) to get rid of command-line option -i. Enable
# -Wno-deprecated-declarations for the RHEL 7.x kernels.
run_conftest = $(shell							\
  export KCFLAGS="-Wno-deprecated-declarations";			\
  if [ "0$(V)" -gt 0 ]; then						\
    output=/dev/stdout;							\
  else									\
    output=conftest/$1/build-output-$(KVER).txt;			\
  fi;									\
  if MAKEFLAGS= make -C $(KDIR) V=$(V)					\
	$(shell [ -n "$(PASS_CC_TO_MAKE)" ] && echo CC="$(CC)")		\
	M="$(shell pwd)/conftest/$1"					\
	CONFTEST_CFLAGS="-Werror $(OFED_CFLAGS)" $(OFED_CONFIG)		\
	KBUILD_EXTRA_SYMBOLS="$(OFED_MODULE_SYMVERS)"			\
	1>&2 2>$${output}; then						\
    echo "$(strip $2)";							\
  else									\
    echo "$(strip $3)";							\
  fi)
run_conftest_bool = $(call run_conftest,$1,-D$(strip $2)=1,-D$(strip $2)=0)

CONFTESTS = $(shell ls -d conftest/*)
CONFTEST_OUTPUTS = $(shell			\
	for t in $(CONFTESTS); do		\
		echo $$t/result-$(KVER).txt;	\
	done)

CONFTEST_CFLAGS = $(OFED_CFLAGS)			\
	-DOFED_FLAVOR=$(OFED_FLAVOR)			\
	$(shell for t in $(CONFTESTS); do 		\
		cat $$t/result-$(KVER).txt 2>/dev/null; \
	done)

all: check $(CONFTEST_OUTPUTS)
	$(MAKE) -C $(KDIR) M=$(shell pwd)/src				\
	  $(shell [ -n "$(PASS_CC_TO_MAKE)" ] && echo CC="$(CC)")	\
	  CONFTEST_CFLAGS="$(CONFTEST_CFLAGS)"				\
	  $(OFED_CONFIG) modules

install: all
	@[ -z "$(DESTDIR)$(INSTALL_MOD_PATH)" ] && \
	  find /lib/modules/$(KVER) -name ib_srpt.ko -exec rm {} \; ; \
	  true
	(cd src && KDIR=$(KDIR) ../../scripts/sign-modules)
	$(MAKE) -C $(KDIR) M=$(shell pwd)/src				\
	  $(shell [ -n "$(PASS_CC_TO_MAKE)" ] && echo CC="$(CC)")	\
	  CONFTEST_CFLAGS="$(CONFTEST_CFLAGS)"				\
	  $$([ -n "$(DEPMOD)" ] && echo "DEPMOD=$(DEPMOD)")		\
	  CONFIG_MODULE_SIG_ALL= modules_install

uninstall:
	rm -f $(INSTALL_DIR)/ib_srpt.ko
	-/sbin/depmod -b $(INSTALL_MOD_PATH)/ -a $(KVER)

check:
	@if [ -n "$(OFED_KERNEL_IB_PKG)" ]; then                            \
	  if [ -z "$(OFED_KERNEL_IB_DEVEL_PKG)" ]; then                     \
	    echo "Error: the OFED development package has not yet been"     \
	         "installed.";						    \
	    false;                                                          \
	  else                                                              \
	    echo "  Building against $(OFED_FLAVOR) $(OFED_KERNEL_IB_PKG)"  \
	         "$(OFED_VERS) InfiniBand kernel headers.";                 \
	  fi                                                                \
	else                                                                \
	  if [ -n "$(OFED_KERNEL_IB_DEVEL_PKG)" ]; then                     \
	    echo "Error: the OFED kernel package has not yet been"          \
	         "installed.";                                              \
	    false;                                                          \
	  else                                                              \
	    echo "  Building against in-tree RDMA kernel headers.";	    \
	  fi;                                                               \
	fi

clean:
	rm -rf conftest/pre_cflags conftest/kcflags
	rm -rf conftest/*/{build-output,result}*.txt
	for d in conftest/* src; do					\
	  [ -d "$$d" ] && $(MAKE) -C $(KDIR) M=$(shell pwd)/$$d $@ &	\
	  rm -f $$d/result*.txt;					\
	done;								\
	wait

extraclean: clean
	rm -f *.orig *.rej

conftest/bad_wr_mod/result-$(KVER).txt:					\
	conftest/bad_wr_mod/bad_wr_mod.c				\
	conftest/bad_wr_mod/Kbuild
	echo "$(call run_conftest,bad_wr_mod,				\
		-DBAD_WR_MODIFIER=const,-DBAD_WR_MODIFIER=)" >"$@"

conftest/cm_event_mod/result-$(KVER).txt:				\
	conftest/cm_event_mod/cm_event_mod.c				\
	conftest/cm_event_mod/Kbuild
	echo "$(call run_conftest,cm_event_mod,				\
		-DCM_HANDLER_EVENT_MODIFIER=const,-DCM_HANDLER_EVENT_MODIFIER=)" >"$@"

conftest/cm_listen/result-$(KVER).txt:					\
	conftest/cm_listen/cm_listen.c					\
	conftest/cm_listen/Kbuild
	echo "$(call run_conftest,cm_listen,				\
		-DIB_CM_LISTEN_TAKES_FOURTH_ARG)" >"$@"

conftest/create_cq/result-$(KVER).txt:					\
	conftest/create_cq/create_cq.c					\
	conftest/create_cq/Kbuild
	echo "$(call run_conftest,create_cq,				\
		-DIB_CREATE_CQ_HAS_INIT_ATTR)" >"$@"

conftest/create_send_mad_ah/result-$(KVER).txt:				\
	conftest/create_send_mad_ah/create_send_mad_ah.c		\
	conftest/create_send_mad_ah/Kbuild
	echo "$(call run_conftest,create_send_mad_ah,			\
		-DCREATE_SEND_MAD_HAS_AH_ARG)" >"$@"

conftest/create_send_mad_base/result-$(KVER).txt:			\
	conftest/create_send_mad_base/create_send_mad_base.c		\
	conftest/create_send_mad_base/Kbuild
	echo "$(call run_conftest,create_send_mad_base,			\
		-DCREATE_SEND_MAD_HAS_BASE_ARG)" >"$@"

conftest/dev_attr_max_send_sge/result-$(KVER).txt:			\
	conftest/dev_attr_max_send_sge/dev_attr_max_send_sge.c		\
	conftest/dev_attr_max_send_sge/Kbuild
	echo "$(call run_conftest_bool,dev_attr_max_send_sge,		\
		HAVE_DEV_ATTR_MAX_SEND_SGE)" >"$@"

conftest/gid_change/result-$(KVER).txt:					\
	conftest/gid_change/gid_change.c				\
	conftest/gid_change/Kbuild
	echo "$(call run_conftest,gid_change,-DHAVE_IB_EVENT_GID_CHANGE)" >"$@"

conftest/ib_client_add_one/result-$(KVER).txt:				\
	conftest/ib_client_add_one/add_one.c				\
	conftest/ib_client_add_one/Kbuild
	echo "$(call run_conftest_bool,ib_client_add_one,		\
		IB_CLIENT_ADD_ONE_RETURNS_INT)" >"$@"

conftest/ib_client_remove/result-$(KVER).txt:				\
	conftest/ib_client_remove/ib_client_remove.c			\
	conftest/ib_client_remove/Kbuild
	echo "$(call run_conftest,ib_client_remove,			\
		-DIB_CLIENT_REMOVE_TAKES_TWO_ARGS)" >"$@"

conftest/ib_dma_map_ops/result-$(KVER).txt:				\
	conftest/ib_dma_map_ops/ib_dma_map_ops.c			\
	conftest/ib_dma_map_ops/Kbuild
	echo "$(call run_conftest,ib_dma_map_ops,-DHAVE_IB_DMA_MAP_OPS)" >"$@"

conftest/ib_set_cpi_resp_time/result-$(KVER).txt:			\
	conftest/ib_set_cpi_resp_time/ib_set_cpi_resp_time.c		\
	conftest/ib_set_cpi_resp_time/Kbuild
	echo "$(call run_conftest,ib_set_cpi_resp_time,			\
		-DHAVE_IB_SET_CPI_RESP_TIME)" >"$@"

conftest/ib_sg_dma_len/result-$(KVER).txt:				\
	conftest/ib_sg_dma_len/ib_sg_dma_len.c				\
	conftest/ib_sg_dma_len/Kbuild
	echo "$(call run_conftest_bool,ib_sg_dma_len,HAVE_IB_SG_DMA_LEN)" >"$@"

conftest/mad_handler_takes_send_buf/result-$(KVER).txt:			\
	conftest/mad_handler_takes_send_buf/mad_handler_takes_send_buf.c\
	conftest/mad_handler_takes_send_buf/Kbuild
	echo "$(call run_conftest,mad_handler_takes_send_buf,		\
		-DMAD_HANDLER_TAKES_SEND_BUF)" >"$@"

conftest/pd_has_local_dma_lkey/result-$(KVER).txt:			\
	conftest/pd_has_local_dma_lkey/pd_has_local_dma_lkey.c		\
	conftest/pd_has_local_dma_lkey/Kbuild
	echo "$(call run_conftest,pd_has_local_dma_lkey,		\
		-DIB_PD_HAS_LOCAL_DMA_LKEY)" >"$@"

conftest/query_device/result-$(KVER).txt:				\
	conftest/query_device/query_device.c				\
	conftest/query_device/Kbuild
	echo "$(call run_conftest,query_device,-DHAVE_IB_QUERY_DEVICE)" >"$@"

conftest/query_device_attr_arg/result-$(KVER).txt:			\
	conftest/query_device_attr_arg/query_device_attr_arg.c		\
	conftest/query_device_attr_arg/Kbuild
	echo "$(call run_conftest,query_device_attr_arg,		\
		-DIB_QUERY_DEVICE_HAS_ATTR_ARG)" >"$@"

conftest/query_gid/result-$(KVER).txt:					\
	conftest/query_gid/query_gid.c					\
	conftest/query_gid/Kbuild
	echo "$(call run_conftest,query_gid,-DIB_QUERY_GID_HAS_ATTR_ARG)" >"$@"

conftest/rdma_create_id_net/result-$(KVER).txt:				\
	conftest/rdma_create_id_net/rdma_create_id_net.c		\
	conftest/rdma_create_id_net/Kbuild
	echo "$(call run_conftest_bool,rdma_create_id_net,		\
		RDMA_CREATE_ID_TAKES_NET_ARG)" >"$@"

conftest/rdma_destroy_ah/result-$(KVER).txt:				\
	conftest/rdma_destroy_ah/rdma_destroy_ah.c			\
	conftest/rdma_destroy_ah/Kbuild
	echo "$(call run_conftest_bool,rdma_destroy_ah,			\
		HAVE_RDMA_DESTROY_AH)" >"$@"

conftest/rdma_destroy_ah_with_flags/result-$(KVER).txt:			\
	conftest/rdma_destroy_ah_with_flags/rdma_destroy_ah_with_flags.c\
	conftest/rdma_destroy_ah_with_flags/Kbuild
	echo "$(call run_conftest_bool,rdma_destroy_ah_with_flags,	\
		HAVE_RDMA_DESTROY_AH_WITH_FLAGS)" >"$@"

conftest/rdma_query_gid/result-$(KVER).txt:				\
	conftest/rdma_query_gid/rdma_query_gid.c			\
	conftest/rdma_query_gid/Kbuild
	echo "$(call run_conftest_bool,rdma_query_gid,HAVE_RDMA_QUERY_GID)" >"$@"

conftest/rdma_reject/result-$(KVER).txt:				\
	conftest/rdma_reject/rdma_reject.c				\
	conftest/rdma_reject/Kbuild
	echo "$(call run_conftest_bool,rdma_reject,			\
		RDMA_REJECT_HAS_FOUR_ARGS)" >"$@"

conftest/register_mad_agent/result-$(KVER).txt:				\
	conftest/register_mad_agent/register_mad_agent.c		\
	conftest/register_mad_agent/Kbuild
	echo "$(call run_conftest,register_mad_agent,			\
		-DREGISTER_MAD_AGENT_HAS_FLAGS_ARG)" >"$@"

conftest/srp_data_desc_imm/result-$(KVER).txt:				\
	conftest/srp_data_desc_imm/srp_data_desc_imm.c			\
	conftest/srp_data_desc_imm/Kbuild
	echo "$(call run_conftest_bool,srp_data_desc_imm,		\
		HAVE_SRP_DATA_DESC_IMM)" >"$@"

conftest/srp_login_req_rdma/result-$(KVER).txt:				\
	conftest/srp_login_req_rdma/srp_login_req_rdma.c		\
	conftest/srp_login_req_rdma/Kbuild
	echo "$(call run_conftest_bool,srp_login_req_rdma,		\
		HAVE_STRUCT_SRP_LOGIN_REQ_RDMA)" >"$@"

conftest/use_pre_440_wr_structure/result-$(KVER).txt:			\
	conftest/use_pre_440_wr_structure/use_pre_440_wr_structure.c	\
	conftest/use_pre_440_wr_structure/Kbuild
	echo "$(call run_conftest,use_pre_440_wr_structure,		\
		-DUSE_PRE_440_WR_STRUCTURE)" >"$@"

release-archive:
	../scripts/generate-release-archive srpt "$$(sed -n 's/^#define[[:blank:]]DRV_VERSION[[:blank:]]*\"\([^\"]*\)\".*/\1/p' src/ib_srpt.c)"

kerneldoc.html: $(SRC_FILES)
	$(KDIR)/scripts/kernel-doc -html $(SRC_FILES) >$@

.PHONY: all install clean extraclean