vhost-vdpa: introduce vhost-vdpa net client

This patch set introduces a new net client type: vhost-vdpa.
vhost-vdpa net client will set up a vDPA device which is specified
by a "vhostdev" parameter.

Signed-off-by: Lingshan Zhu <lingshan.zhu@intel.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Cindy Lu <lulu@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20200701145538.22333-15-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

1 files changed, 26 insertions, 2 deletions

diff --git a/qapi/net.json b/qapi/net.json
index 9244c9af56..558d520a2f 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -429,15 +429,38 @@
     '*queues':        'int' } }
 
 ##
+# @NetdevVhostVDPAOptions:
+#
+# Vhost-vdpa network backend
+#
+# vDPA device is a device that uses a datapath which complies with the virtio
+# specifications with a vendor specific control path.
+#
+# @vhostdev: path of vhost-vdpa device
+#            (default:'/dev/vhost-vdpa-0')
+#
+# @queues: number of queues to be created for multiqueue vhost-vdpa
+#          (default: 1)
+#
+# Since: 5.1
+##
+{ 'struct': 'NetdevVhostVDPAOptions',
+  'data': {
+    '*vhostdev':     'str',
+    '*queues':       'int' } }
+
+##
 # @NetClientDriver:
 #
 # Available netdev drivers.
 #
 # Since: 2.7
+#
+# @vhost-vdpa since 5.1
 ##
 { 'enum': 'NetClientDriver',
   'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'vde',
-            'bridge', 'hubport', 'netmap', 'vhost-user' ] }
+            'bridge', 'hubport', 'netmap', 'vhost-user', 'vhost-vdpa' ] }
 
 ##
 # @Netdev:
@@ -465,7 +488,8 @@
     'bridge':   'NetdevBridgeOptions',
     'hubport':  'NetdevHubPortOptions',
     'netmap':   'NetdevNetmapOptions',
-    'vhost-user': 'NetdevVhostUserOptions' } }
+    'vhost-user': 'NetdevVhostUserOptions',
+    'vhost-vdpa': 'NetdevVhostVDPAOptions' } }
 
 ##
 # @NetFilterDirection: