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package/nvidia-driver: build the kernel module

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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: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2015-02-10 21:01:14 +01:00 committed by Thomas Petazzoni
parent 13d761486a
commit 7b9285a874
2 changed files with 64 additions and 0 deletions
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14
package/nvidia-driver/Config.in
View File

@ -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

50
package/nvidia-driver/nvidia-driver.mk
View File

@ -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))