# Makefile -- For the Direct Rendering Manager module (drm)
#
# Based on David Woodhouse's mtd build.
#
# Modified to handle the DRM requirements and builds on a wider range of
# platforms in a flexible way by David Dawes.  It's not clear, however,
# that this approach is simpler than the old one.
#
# The purpose of this Makefile.linux file is to handle setting up everything
# needed for an out-of-kernel source build.  Makefile.kernel contains
# everything required for in-kernel source builds.  It is included into
# this file, so none of that should be duplicated here.
#
# $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.linux,v 1.37 2003/04/23 01:48:57 dawes Exp $
#

#
# By default, the build is done against the running linux kernel source.
# To build against a different kernel source tree, set LINUXDIR:
#
#    make -f Makefile.linux LINUXDIR=/path/to/kernel/source

#
# To build only some modules, either set DRM_MODULES to the list of modules,
# or specify the modules as targets:
#
#    make -f Makefile.linux r128.o radeon.o
#
# or:
#
#    make -f Makefile.linux DRM_MODULES="r128 radeon"
#

SHELL=/bin/sh

.SUFFIXES:

ifndef LINUXDIR
RUNNING_REL := $(shell uname -r)

LINUXDIR := /lib/modules/$(RUNNING_REL)/build
endif

MACHINE := $(shell uname -m)

# Modules for all architectures
MODULE_LIST := gamma.o tdfx.o r128.o radeon.o mga.o #sis.o

# Modules only for ix86 architectures
ifneq (,$(findstring 86,$(MACHINE)))
MODULE_LIST += i830.o i810.o
endif

# Add ffb.o for sparc??

DRM_MODULES ?= $(MODULE_LIST)

# These definitions are for handling dependencies in the out of kernel build.

DRMTEMPLATES =  drm_auth.h drm_bufs.h drm_context.h drm_dma.h drm_drawable.h \
                drm_drv.h drm_fops.h drm_init.h drm_ioctl.h \
                drm_lock.h drm_memory.h drm_proc.h drm_stub.h drm_vm.h

DRMSHARED =     drm_sarea.h
DRMHEADERS =    drm.h drmP.h $(DRMSHARED)

GAMMAHEADERS =  gamma.h gamma_context.h gamma_drm.h gamma_drv.h gamma_lists.h \
                gamma_old_dma.h gamma_lock.h $(DRMHEADERS) $(DRMTEMPLATES)
TDFXHEADERS =   tdfx.h $(DRMHEADERS) $(DRMTEMPLATES)
R128HEADERS =   r128.h r128_drv.h r128_drm.h $(DRMHEADERS) $(DRMTEMPLATES)
R128SHARED =    r128.h r128_drv.h r128_drm.h r128_cce.c r128_state.c r128_irq.c
RADEONHEADERS = radeon.h radeon_drv.h radeon_drm.h $(DRMHEADERS) \
                $(DRMTEMPLATES)
RADEONSHARED =  radeon.h radeon_drv.h radeon_drm.h radeon_cp.c radeon_irq.c \
                radeon_mem.c radeon_state.c
MGAHEADERS =    mga.h mga_drv.h mga_drm.h mga_ucode.h $(DRMHEADERS) \
		$(DRMTEMPLATES)
MGASHARED =     mga.h mga_dma.c mga_drm.h mga_drv.h mga_irq.c mga_state.c \
                mga_ucode.h mga_warp.c
I810HEADERS =   i810.h i810_drv.h i810_drm.h $(DRMHEADERS) $(DRMTEMPLATES)
I830HEADERS =   i830.h i830_drv.h i830_drm.h $(DRMHEADERS) $(DRMTEMPLATES)
SISHEADERS=     sis_drv.h sis_drm.h $(DRMHEADERS)

SHAREDSRC = $(DRMSHARED) $(MGASHARED) $(R128SHARED) $(RADEONSHARED)

CLEANFILES = *.o *.ko $(PROGS) .depend .*.flags .*.d .*.cmd

# VERSION is not defined from the initial invocation.  It is defined when
# this Makefile is invoked from the kernel's root Makefile.

ifndef VERSION

ifdef RUNNING_REL

# SuSE has the version.h and autoconf.h headers for the current kernel
# in /boot as /boot/vmlinuz.version.h and /boot/vmlinuz.autoconf.h.
# Check these first to see if they match the running kernel.

BOOTVERSION_PREFIX = /boot/vmlinuz.

V := $(shell if [ -f $(BOOTVERSION_PREFIX)version.h ]; then \
	grep UTS_RELEASE $(BOOTVERSION_PREFIX)version.h | \
	cut -d' ' -f3; fi)

ifeq ($(V),"$(RUNNING_REL)")
HEADERFROMBOOT := 1
GETCONFIG := MAKEFILES=$(shell pwd)/.config
HAVECONFIG := y
endif

# On Red Hat we need to check if there is a .config file in the kernel
# source directory.  If there isn't, we need to check if there's a
# matching file in the configs subdirectory.

ifneq ($(HAVECONFIG),y)
HAVECONFIG := $(shell if [ -e $(LINUXDIR)/.config ]; then echo y; fi)
endif

ifneq ($(HAVECONFIG),y)
REL_BASE := $(shell echo $(RUNNING_REL) | sed 's/-.*//')
REL_TYPE := $(shell echo $(RUNNING_REL) | sed 's/[0-9.-]//g')
ifeq ($(REL_TYPE),)
RHCONFIG := configs/kernel-$(REL_BASE)-$(MACHINE).config
else
RHCONFIG := configs/kernel-$(REL_BASE)-$(MACHINE)-$(REL_TYPE).config
endif
HAVECONFIG := $(shell if [ -e $(LINUXDIR)/$(RHCONFIG) ]; then echo y; fi)
ifneq ($(HAVECONFIG),y)
RHCONFIG :=
endif
endif

ifneq ($(HAVECONFIG),y)
$(error Cannot find a kernel config file)
endif

endif

CLEANCONFIG := $(shell if cmp -s $(LINUXDIR)/.config .config; then echo y; fi)
ifeq ($(CLEANCONFIG),y)
CLEANFILES += $(LINUXDIR)/.config .config $(LINUXDIR)/tmp_include_depends
endif

# The Makefile renaming hack is required because the standard kernel build,
# especially 2.5.52 and later, explicitly references the Makefile by the
# name "Makefile".  For builds prior to 2.5.52, the name GNUmakefile could
# have been used.

all: modules

modules: includes
	@if test -f Makefile && cmp -s Makefile Makefile.linux; then : ; \
	  else \
		if [ -e Makefile ]; then \
			(set -x; mv -f Makefile Makefile._xx_); fi; \
		(set -x; ln -s Makefile.linux Makefile); fi
	make -C $(LINUXDIR) $(GETCONFIG) SUBDIRS=`pwd` DRMSRCDIR=`pwd` modules
	@if cmp -s Makefile Makefile.linux; then \
		(set -x; rm -f Makefile); \
		if [ -e Makefile._xx_ ]; then \
			(set -x; mv -f Makefile._xx_ Makefile); fi; fi

ifeq ($(HEADERFROMBOOT),1)

BOOTHEADERS = version.h autoconf.h
BOOTCONFIG = .config

CLEANFILES += $(BOOTHEADERS) $(BOOTCONFIG)

includes:: $(BOOTHEADERS) $(BOOTCONFIG)

version.h: $(BOOTVERSION_PREFIX)version.h
	rm -f $@
	ln -s $< $@

autoconf.h: $(BOOTVERSION_PREFIX)autoconf.h
	rm -f $@
	ln -s $< $@

.config: $(BOOTVERSION_PREFIX)config
	rm -f $@
	ln -s $< $@
endif

# This prepares an unused Red Hat kernel tree for the build.
ifneq ($(RHCONFIG),)
includes:: $(LINUXDIR)/.config $(LINUXDIR)/tmp_include_depends .config

$(LINUXDIR)/.config: $(LINUXDIR)/$(RHCONFIG)
	rm -f $@
	ln -s $< $@

.config: $(LINUXDIR)/$(RHCONFIG)
	rm -f $@
	ln -s $< $@

$(LINUXDIR)/tmp_include_depends:
	echo all: > $@
endif

# Make sure that the shared source files are linked into this directory.


SHAREDDIR := ../../../shared/drm/kernel

HASSHARED := $(shell if [ -d $(SHAREDDIR) ]; then echo y; fi)

ifeq ($(HASSHARED),y)
includes:: $(SHAREDSRC)

$(SHAREDSRC):
	@if [ -r $(SHAREDDIR)/$@ ]; then \
		(rm -f $@; set -x; ln -s $(SHAREDDIR)/$@ $@); fi

CLEANFILES += $(SHAREDSRC)
endif

includes:: linux

linux:
	rm -f linux
	ln -s . linux

clean cleandir:
	rm -f $(CLEANFILES)

$(MODULE_LIST)::
	make -f Makefile.linux DRM_MODULES=$@ modules

else

# Check for kernel versions that we don't support.

BELOW24 := $(shell if [ $(VERSION) -lt 2 -o $(PATCHLEVEL) -lt 4 ]; then \
		echo y; fi)

ifeq ($(BELOW24),y)
$(error Only 2.4.x and later kernels are supported \
	($(VERSION).$(PATCHLEVEL).$(SUBLEVEL)))
endif

# This needs to go before all other include paths.
CC += -I$(DRMSRCDIR)

# Check for Red Hat's 4-argument do_munmap().
DOMUNMAP := $(shell grep do_munmap $(LINUXDIR)/include/linux/mm.h | \
                grep -c acct)
# Check for 5-argument remap_page_range() in RH9 kernel, and 2.5.x kernels
RPR := $(shell grep remap_page_range $(LINUXDIR)/include/linux/mm.h | \
		grep -c vma)

ifneq ($(DOMUNMAP),0)
EXTRA_CFLAGS += -DDO_MUNMAP_4_ARGS
endif

ifneq ($(RPR),0)
EXTRA_CFLAGS += -DREMAP_PAGE_RANGE_5_ARGS
endif

# Start with all modules turned off.
CONFIG_DRM_GAMMA := n
CONFIG_DRM_TDFX := n
CONFIG_DRM_MGA := n
CONFIG_DRM_I810 := n
CONFIG_DRM_R128 := n
CONFIG_DRM_RADEON := n
CONFIG_DRM_I830 := n
CONFIG_DRM_SIS := n
CONFIG_DRM_FFB := n

# Enable module builds for the modules requested/supported.

ifneq (,$(findstring gamma,$(DRM_MODULES)))
CONFIG_DRM_GAMMA := m
endif
ifneq (,$(findstring tdfx,$(DRM_MODULES)))
CONFIG_DRM_TDFX := m
endif
ifneq (,$(findstring r128,$(DRM_MODULES)))
CONFIG_DRM_R128 := m
endif
ifneq (,$(findstring radeon,$(DRM_MODULES)))
CONFIG_DRM_RADEON := m
endif
ifneq (,$(findstring sis,$(DRM_MODULES)))
CONFIG_DRM_SIS := m
endif

# These require AGP support

ifdef CONFIG_AGP
ifneq (,$(findstring mga,$(DRM_MODULES)))
CONFIG_DRM_MGA := m
endif
ifneq (,$(findstring i810,$(DRM_MODULES)))
CONFIG_DRM_I810 := m
endif
ifneq (,$(findstring i830,$(DRM_MODULES)))
CONFIG_DRM_I830 := m
endif
endif

include $(DRMSRCDIR)/Makefile.kernel

# Depencencies
$(gamma-objs):	$(GAMMAHEADERS)
$(tdfx-objs):	$(TDFXHEADERS)
$(r128-objs):	$(R128HEADERS)
$(mga-objs):	$(MGAHEADERS)
$(i810-objs):	$(I810HEADERS)
$(i830-objs):	$(I830HEADERS)
$(radeon-objs):	$(RADEONHEADERS)
$(sis-objs):	$(SISHEADERS)
$(ffb-objs):	$(FFBHEADERS)

endif