Commit 7b9285a8 authored by Yann E. MORIN's avatar Yann E. MORIN Committed by Thomas Petazzoni
Browse files

package/nvidia-driver: build the kernel module 

Add option to build the nvidia.ko module. If CUDA is enabled on x86_64,
also build the nvidia-uvm.ko kernel module (for Unified Memory access),
which is required by the CUDA user-land library.

Substancially inspired by the corresponding Gentoo ebuild:
    http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-drivers/nvidia-drivers/nvidia-drivers-340.32.ebuild?revision=1.2&view=markup



[Thomas:
  - add quotes when using $(TARGET_CC) and other variables, since they
    can have spaces in their values
  - remove space after opening parenthesis and before closing parenthesis.]

Signed-off-by: default avatar"Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent 13d76148

package/nvidia-driver/Config.in

+14 −0
Original line number Diff line number Diff line
@@ -49,4 +49,18 @@ config BR2_PACKAGE_NVIDIA_DRIVER_PRIVATE_LIBS 
	  Say 'y' here if you plan on running a program that uses

	  those private libraries.



comment "nvidia kernel module needs a kernel to be built"

	depends on !BR2_LINUX_KERNEL



config BR2_PACKAGE_NVIDIA_DRIVER_MODULE

	bool "nvidia kernel module"

	depends on BR2_LINUX_KERNEL

	help

	  Build the nvidia.ko kernel module.



	  If CUDA support (above) is set, and the target is x86_64, then

	  this will also build the nvidia-uvm.ko kernel module, which

	  provides Unified Memory access to the GPU and CPU memories for

	  CUDA programs.



endif # BR2_PACKAGE_NVIDIA_DRIVER

package/nvidia-driver/nvidia-driver.mk

+50 −0
Original line number Diff line number Diff line
@@ -70,6 +70,55 @@ define NVIDIA_DRIVER_EXTRACT_CMDS 
	rm -rf $(@D)/tmp-extract

endef



# Build and install the kernel modules if needed

ifeq ($(BR2_PACKAGE_NVIDIA_DRIVER_MODULE),y)



NVIDIA_DRIVER_DEPENDENCIES += linux



# NVidia uses the legacy naming scheme for the x86 architecture, when i386

# and x86_64 were still considered two separate architectures in the Linux

# kernel.

NVIDIA_DRIVER_ARCH = $(if $(BR2_i386),i386,$(BR2_ARCH))



NVIDIA_DRIVER_MOD_DIRS = kernel

NVIDIA_DRIVER_MOD_FILES = kernel/nvidia.ko

# nvidia-uvm.ko only available for x86_64

ifeq ($(BR2_x86_64)$(BR2_PACKAGE_NVIDIA_DRIVER_CUDA),yy)

NVIDIA_DRIVER_MOD_DIRS += kernel/uvm

NVIDIA_DRIVER_MOD_FILES += kernel/uvm/nvidia-uvm.ko

endif



# We can not use '$(MAKE) -C $(@D)/$${dir}' because NVidia's uses its own

# Makefile to build a kernel module, which includes a lot of assumptions

# on where to find its own sub-Makefile fragments, and fails if make is

# not run from the directory where the module's source files are. Hence

# our little trick to cd in there first.

# That's also the reason why we do not use LINUX_MAKE_FLAGS or the other

# linux-specific variables, since NVidia's Makefile does not understand

# them.

define NVIDIA_DRIVER_BUILD_CMDS

	for dir in $(NVIDIA_DRIVER_MOD_DIRS); do \

		(cd $(@D)/$${dir} && \

		  $(MAKE) SYSSRC="$(LINUX_DIR)" SYSOUT="$(LINUX_DIR)" \

				CC="$(TARGET_CC)" LD="$(TARGET_LD)" HOSTCC="$(HOSTCC)" \

				ARCH=$(NVIDIA_DRIVER_ARCH) module) || exit 1; \

	done

endef



# We do not use module-install because NVidia's Makefile requires root.

# Also, we do not install it in the expected location (in nvidia/ rather

# than in kernel/drivers/video/)

define NVIDIA_DRIVER_INSTALL_KERNEL_MODULE

	for mod in $(NVIDIA_DRIVER_MOD_FILES); do \

		$(INSTALL) -D -m 0644 $(@D)/$${mod} \

			$(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/nvidia/$${mod##*/} \

		|| exit 1; \

	done

	$(HOST_DIR)/sbin/depmod -a -b $(TARGET_DIR) $(LINUX_VERSION_PROBED)

endef



endif # BR2_PACKAGE_NVIDIA_DRIVER_MODULE == y



# Helper to install libraries

# $1: destination directory (target or staging)

#
@@ -112,6 +161,7 @@ define NVIDIA_DRIVER_INSTALL_TARGET_CMDS 
		$(INSTALL) -D -m 0644 $(@D)/$${m##*/} \

			$(TARGET_DIR)/usr/lib/xorg/modules/$${m}; \

	done

	$(NVIDIA_DRIVER_INSTALL_KERNEL_MODULE)

endef



$(eval $(generic-package))