[PATCH 3/6] virtio-blk-pci: implement device event interface for kick/call

[Dongli Zhang <dongli.zhang@oracle.com>]

This is to implement the device event interface for virtio-blk-pci.

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
---
 hw/block/virtio-blk.c          |  9 +++++++++
 hw/virtio/virtio-blk-pci.c     | 10 ++++++++++
 include/hw/virtio/virtio-blk.h |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index d28979efb8..2b3583a913 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1118,6 +1118,15 @@ static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
     return 0;
 }
 
+void virtio_blk_device_event(DeviceState *dev, int event, int queue,
+                             Error **errp)
+{
+    VirtIOBlock *s = VIRTIO_BLK(dev);
+    bool irqfd = s->dataplane_started && !s->dataplane_disabled;
+
+    virtio_device_event(dev, event, queue, irqfd, errp);
+}
+
 static void virtio_resize_cb(void *opaque)
 {
     VirtIODevice *vdev = opaque;
diff --git a/hw/virtio/virtio-blk-pci.c b/hw/virtio/virtio-blk-pci.c
index 9d5795810c..f1fc72e7f1 100644
--- a/hw/virtio/virtio-blk-pci.c
+++ b/hw/virtio/virtio-blk-pci.c
@@ -47,6 +47,15 @@ static Property virtio_blk_pci_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static void virtio_blk_pci_event(DeviceState *dev, int event, int queue,
+                                 Error **errp)
+{
+    VirtIOBlkPCI *vblk = VIRTIO_BLK_PCI(dev);
+    DeviceState *vdev = DEVICE(&vblk->vdev);
+
+    virtio_blk_device_event(vdev, event, queue, errp);
+}
+
 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 {
     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
@@ -72,6 +81,7 @@ static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
 
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     device_class_set_props(dc, virtio_blk_pci_properties);
+    dc->event = virtio_blk_pci_event;
     k->realize = virtio_blk_pci_realize;
     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 29655a406d..500be01dff 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -92,5 +92,7 @@ typedef struct MultiReqBuffer {
 
 bool virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
 void virtio_blk_process_queued_requests(VirtIOBlock *s, bool is_bh);
+void virtio_blk_device_event(DeviceState *dev, int event, int queue,
+                             Error **errp);
 
 #endif
-- 
2.17.1