gpu: nvgpu: unit: Add script to install unit tests

Add a script to install unit tests on a target jetson board.
The installation consists of copying all the binaries generated
by tmake over to that target board and building a source tree
that matches the nvgpu code.

The reason the systemimage out directory is not used is this
is created by the `image createfs' command during the build
process. This script will work after just a simple `tmm[p]'

Change-Id: I1f2650e666a42c12762ab444159b69ba8fc582f8
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1850545
Reviewed-by: Philip Elcan <pelcan@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/install-unit.sh

@@ -0,0 +1,110 @@
+#!/bin/bash
+#
+# Install the unit test binaries, build by tmake, onto a jetson running
+# L4T. The only argument is the IP address of the jetson.
+#
+
+usage() {
+    echo "Usage:"
+    echo ""
+    echo "  $ $1 [-hs] [--help] [--install-sshkey] <jetson-ip>"
+    echo ""
+}
+
+# Copy to target jetson. Takes a local path and a remote path relative
+# to ubuntu's $HOME.
+#
+# It helps a lot of you set up an authorized key on the target! Otherwise
+# you may have a lot of typing to do...
+jcp() {
+    cmd="rsync -qru $1 $target:$2"
+    echo "> $cmd"
+    $cmd
+}
+
+# Add our public key to the authorized key list on the target host.
+install_ssh_key() {
+    ssh-copy-id -f $target
+    return $?
+}
+
+# Variables which may be set by CLI arguments.
+install_sshkey=
+
+# To start with filter out any non-target arguments. Right now that's only -h
+# and -s.
+positionals=()
+while [[ $# -gt 0 ]]
+do
+    arg="$1"
+
+    case $arg in
+	-h|--help)
+	    usage $0
+	    exit 1
+	    ;;
+	-s|--install-sshkey)
+	    install_sshkey=yes
+	    shift
+	    ;;
+	*)
+	    positionals+=("$1")
+	    shift
+	    ;;
+    esac
+done
+
+set -- "${positionals[@]}"
+
+if [ "x$1" == "x" ]
+then
+    echo "Missing IP address!"
+    usage $0
+    exit 1
+fi
+
+if [ "x$TOP" == "x" ]
+then
+    echo "\$TOP must be set!"
+    exit 1
+fi
+
+target="ubuntu@$1"
+nvgpu_bins=$TOP/out/*/nvidia/kernel/nvgpu
+
+# Install the ssh key if needed.
+if [ "$install_sshkey" == "yes" ]
+then
+    echo "Installing our SSH key"
+    install_ssh_key $target || exit 1
+fi
+
+# Building the necessary directory structure. It may not be present
+# first time this is run.
+ssh $target mkdir -p nvgpu_unit/units
+ssh $target mkdir -p $TOP/kernel
+if [ $? != 0 ]; then
+    echo
+    echo "!! Unable to make $TOP on the target jetson! This directory needs"
+    echo "!! to be present and writable by this script in order for coverage"
+    echo "!! tracking to work."
+    exit 1
+fi
+
+# And copy...
+jcp $nvgpu_bins/userspace-l4t_64/nvgpu_unit              nvgpu_unit/nvgpu_unit
+jcp $nvgpu_bins/userspace-l4t_64/libnvgpu_unit-lib.so    nvgpu_unit/libnvgpu-unit.so
+jcp $nvgpu_bins/drivers/gpu/nvgpu-l4t_64/libnvgpu-drv.so nvgpu_unit/libnvgpu-drv.so
+jcp $TOP/kernel/nvgpu/userspace/unit.sh                  nvgpu_unit/unit.sh
+
+for unit_dir in `ls $nvgpu_bins/userspace/units`; do
+    unit=${unit_dir%-l4t_64}
+    jcp $nvgpu_bins/userspace/units/$unit_dir/lib$unit.so nvgpu_unit/units
+done
+
+# Set up the necessary coverage files. Basically what we do is recreate just
+# enough of the source/build output here on the local machine over on the
+# target jetson. This means you may
+jcp $nvgpu_bins            nvgpu_unit
+jcp $TOP/kernel/nvgpu      $TOP/kernel
+jcp $TOP/kernel/nvgpu-next $TOP/kernel