[dpdk-dev] [PATCH 2/3] usertools: add hv_uio_setup script

[Stephen Hemminger <stephen@networkplumber.org>]

Small script to rebind netvsc kernel device to Hyper-V
networking PMD. It could be integrated in dpdk-bind, but dpdk-bind
is focused on PCI, and that would get messy.

Eventually, this functionality will be built into netvsc driver
(see vdev_netvsc as an example).

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
 usertools/hv_uio_setup.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 usertools/hv_uio_setup.sh

diff --git a/usertools/hv_uio_setup.sh b/usertools/hv_uio_setup.sh
new file mode 100755
index 000000000000..9885a0e80828
--- /dev/null
+++ b/usertools/hv_uio_setup.sh
@@ -0,0 +1,40 @@
+#! /bin/bash
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Microsoft Corporation
+
+module=uio_hv_generic
+# Hyper-V network device GUID
+net_guid="f8615163-df3e-46c5-913f-f2d2f965ed0e"
+
+if [ $# -ne 1 ]; then
+	echo "Usage: $0 ethN"
+	exit 1
+fi
+
+syspath=/sys/class/net/$1/device
+devpath=$(readlink $syspath)
+if [ $? -ne 0 ]; then
+	echo "$1 no device present"
+	exit 1
+fi
+dev_guid=$(basename $devpath)
+
+driver=$(readlink $syspath/driver)
+if [ $? -ne 0 ]; then
+	echo "$1 driver not found"
+	exit 1
+fi
+existing=$(basename $driver)
+
+if [ "$existing" != "hv_netvsc" ]; then
+	echo "$1 controlled by $existing"
+	exit 1
+fi
+
+if [ ! -d /sys/module/$module ]; then
+    modprobe $module
+    echo $net_guid >/sys/bus/vmbus/drivers/uio_hv_generic/new_id
+fi
+
+echo $dev_guid > /sys/bus/vmbus/drivers/$existing/unbind
+echo $dev_guid > /sys/bus/vmbus/drivers/$module/bind
-- 
2.16.3