linux/efa: Add spec file for EFA kernel driver

Add a spec file to package the EFA kernel driver source and install it
using dkms. This is so we can install the driver in an environment where
we do not control the kernel installation.  We should add another spec
file to build the kernel driver and package it when we package the
driver with the kernel.

Signed-off-by: Robert Wespetal <wesper@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>

kernel/linux/efa/README

@@ -40,6 +40,11 @@ sudo yum install kernel-devel-$(uname -r)
 Compilation:
 Run "make", efa.ko is created inside the folder.
 
+To build EFA RPMs run `make` in the rpm/ folder. Your environment will need to
+be setup to build RPMs. The EFA RPM will install the EFA kernel driver source,
+setup DKMS in order to build the driver when the kernel is updated, and update
+the configuration files to load EFA and its dependencies at boot time.
+
 Driver installation
 ===================
 Loading driver

kernel/linux/efa/conf/dkms.conf

@@ -0,0 +1,10 @@
+PACKAGE_NAME="efa"
+PACKAGE_VERSION="0.9.0"
+CLEAN="make clean"
+MAKE="make KERNEL_VERSION=${kernelver}"
+BUILT_MODULE_NAME[0]="efa"
+BUILT_MODULE_LOCATION=""
+DEST_MODULE_LOCATION="/extra"
+DEST_MODULE_NAME[0]="efa"
+AUTOINSTALL="yes"
+NO_WEAK_MODULES="yes"

kernel/linux/efa/conf/efa.conf

@@ -0,0 +1,4 @@
+# /etc/modules-load.d/efa.conf
+ib_core
+ib_uverbs
+efa

kernel/linux/efa/rpm/Makefile

@@ -0,0 +1,39 @@
+# Makefile for creating rpm of the Amazon EFA driver
+
+NAME	= efa
+VERSION	= 0.9.0
+
+TOPDIR  := $(shell git rev-parse --show-toplevel)
+TAG	= master
+TARBALL	= $(NAME)-$(VERSION).tar
+
+RPMDEFS = --define '_topdir  %(pwd)' \
+          --define '_ntopdir %(pwd)' \
+          --define '_builddir  %{_ntopdir}/build' \
+          --define '_buildrootdir %{_builddir}' \
+          --define '_sourcedir %{_ntopdir}' \
+          --define '_specdir   %{_ntopdir}' \
+          --define '_rpmdir    %{_ntopdir}' \
+          --define '_srcrpmdir %{_ntopdir}' \
+	  --define "driver_version $(VERSION)"
+
+all : rpm
+
+tarball : $(TARBALL)
+$(TARBALL) : always
+	(cd $(TOPDIR) && \
+	git archive --format=tar --prefix=$(NAME)-$(VERSION)/ $(TAG) \
+	kernel/linux/efa/) > $@
+
+srpm : $(TARBALL) Makefile
+	rpmbuild -bs $(RPMDEFS) efa.spec
+
+rpm : $(TARBALL) Makefile
+	rpmbuild -ba $(RPMDEFS) efa.spec
+
+clean :
+	rm -f $(TARBALL) *.src.rpm
+
+always:
+
+.PHONY : srpm clean always

kernel/linux/efa/rpm/efa.spec

@@ -0,0 +1,64 @@
+%define name			efa
+%define debug_package		%{nil}
+
+Name:		%{name}
+Version:	%{driver_version}
+Release:	1%{?dist}
+Summary:	%{name} kernel module
+
+Group:		System/Kernel
+License:	Dual BSD/GPL
+URL:		https://github.com/amzn/amzn-drivers/
+Source0:	%{name}-%{version}.tar
+
+Requires:	dkms %kernel_module_package_buildreqs
+
+%define install_path /usr/src/%{name}-%{version}
+
+%description
+%{name} kernel module source and DKMS scripts to build the kernel module.
+
+%prep
+%setup -n %{name}-%{version} -q
+
+%post
+dkms add -m %{name} -v %{driver_version}
+dkms build -m %{name} -v %{driver_version}
+dkms install -m %{name} -v %{driver_version}
+
+%preun
+dkms remove -m %{name} -v %{driver_version} --all
+
+%build
+
+%install
+cd kernel/linux/efa
+mkdir -p %{buildroot}%{install_path}
+install -D -m 644 conf/efa.conf		%{buildroot}/etc/modules-load.d/efa.conf
+install -m 644 conf/dkms.conf		%{buildroot}%{install_path}
+install -m 644 efa_com.c		%{buildroot}%{install_path}
+install -m 644 efa_com_cmd.c		%{buildroot}%{install_path}
+install -m 644 efa_main.c		%{buildroot}%{install_path}
+install -m 644 efa_sysfs.c		%{buildroot}%{install_path}
+install -m 644 efa_verbs.c		%{buildroot}%{install_path}
+install -m 644 efa-abi.h 		%{buildroot}%{install_path}
+install -m 644 efa_admin_cmds_defs.h 	%{buildroot}%{install_path}
+install -m 644 efa_admin_defs.h 	%{buildroot}%{install_path}
+install -m 644 efa_com_cmd.h		%{buildroot}%{install_path}
+install -m 644 efa_com.h		%{buildroot}%{install_path}
+install -m 644 efa_common_defs.h	%{buildroot}%{install_path}
+install -m 644 efa.h			%{buildroot}%{install_path}
+install -m 644 efa_regs_defs.h		%{buildroot}%{install_path}
+install -m 644 efa_sysfs.h		%{buildroot}%{install_path}
+install -m 644 kcompat.h		%{buildroot}%{install_path}
+install -m 644 Makefile			%{buildroot}%{install_path}
+install -m 644 README			%{buildroot}%{install_path}
+install -m 644 RELEASENOTES.md		%{buildroot}%{install_path}
+
+%files
+%{install_path}
+/etc/modules-load.d/efa.conf
+
+%changelog
+* Fri Mar 8 2019 Robert Wespetal <wesper@amazon.com> - 0.9.0
+- initial build for RHEL