[PATCH 3/5] net/virtio: add set config callback

[skoteshwar]

From: Satha Rao <skotesh...@marvell.com>

This patch enables the set config callback handler.

Signed-off-by: Satha Rao <skotesh...@marvell.com>
---
 drivers/net/virtio/virtio_user/vhost.h      |  1 +
 drivers/net/virtio/virtio_user/vhost_vdpa.c | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/net/virtio/virtio_user/vhost.h 
b/drivers/net/virtio/virtio_user/vhost.h
index eee3a4bc47..45ae56e3b5 100644
--- a/drivers/net/virtio/virtio_user/vhost.h
+++ b/drivers/net/virtio/virtio_user/vhost.h
@@ -92,6 +92,7 @@ struct virtio_user_backend_ops {
        int (*get_intr_fd)(struct virtio_user_dev *dev);
        int (*map_notification_area)(struct virtio_user_dev *dev);
        int (*unmap_notification_area)(struct virtio_user_dev *dev);
+       int (*set_config_call)(struct virtio_user_dev *dev, int fd);
 };
 
 extern struct virtio_user_backend_ops virtio_ops_user;
diff --git a/drivers/net/virtio/virtio_user/vhost_vdpa.c 
b/drivers/net/virtio/virtio_user/vhost_vdpa.c
index bc3e2a9af5..5c610664b6 100644
--- a/drivers/net/virtio/virtio_user/vhost_vdpa.c
+++ b/drivers/net/virtio/virtio_user/vhost_vdpa.c
@@ -48,6 +48,7 @@ struct vhost_vdpa_data {
 #define VHOST_VDPA_SET_VRING_ENABLE _IOW(VHOST_VIRTIO, 0x75, struct 
vhost_vring_state)
 #define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
 #define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
+#define VHOST_SET_CONFIG_CALL      _IOW(VHOST_VIRTIO, 0x77, int)
 
 /* no alignment requirement */
 struct vhost_iotlb_msg {
@@ -509,6 +510,14 @@ vhost_vdpa_set_config(struct virtio_user_dev *dev, const 
uint8_t *data, uint32_t
        return ret;
 }
 
+static int
+vhost_vdpa_set_config_call(struct virtio_user_dev *dev, int fd)
+{
+       struct vhost_vdpa_data *data = dev->backend_data;
+
+       return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_CONFIG_CALL, &fd);
+}
+
 /**
  * Set up environment to talk with a vhost vdpa backend.
  *
@@ -706,6 +715,7 @@ struct virtio_user_backend_ops virtio_ops_vdpa = {
        .set_status = vhost_vdpa_set_status,
        .get_config = vhost_vdpa_get_config,
        .set_config = vhost_vdpa_set_config,
+       .set_config_call = vhost_vdpa_set_config_call,
        .cvq_enable = vhost_vdpa_cvq_enable,
        .enable_qp = vhost_vdpa_enable_queue_pair,
        .dma_map = vhost_vdpa_dma_map_batch,
-- 
2.25.1