[PATCH v2] vhost: add vDPA resource cleanup callback

[Xueming Li <xuemingl@nvidia.com>]

This patch adds vDPA device cleanup callback to release resources on
vhost user connection close.

Signed-off-by: Xueming Li <xuemingl@nvidia.com>
---
 lib/vhost/vdpa_driver.h | 3 +++
 lib/vhost/vhost_user.c  | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/lib/vhost/vdpa_driver.h b/lib/vhost/vdpa_driver.h
index fc2d6acedd1..fddbd506523 100644
--- a/lib/vhost/vdpa_driver.h
+++ b/lib/vhost/vdpa_driver.h
@@ -34,6 +34,9 @@ struct rte_vdpa_dev_ops {
 	/** Driver close the device (Mandatory) */
 	int (*dev_close)(int vid);
 
+	/** Connection closed, clean up resources */
+	int (*dev_cleanup)(int vid);
+
 	/** Enable/disable this vring (Mandatory) */
 	int (*set_vring_state)(int vid, int vring, int state);
 
diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 5eb1dd68123..798b0ca4c0d 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -220,6 +220,12 @@ free_mem_region(struct virtio_net *dev)
 void
 vhost_backend_cleanup(struct virtio_net *dev)
 {
+	struct rte_vdpa_device *vdpa_dev;
+
+	vdpa_dev = dev->vdpa_dev;
+	if (vdpa_dev && vdpa_dev->ops->dev_cleanup != NULL)
+		vdpa_dev->ops->dev_cleanup(dev->vid);
+
 	if (dev->mem) {
 		free_mem_region(dev);
 		rte_free(dev->mem);
-- 
2.34.1