[PATCH V5 3/6] vDPA: add get_vq_irq() in vdpa_config_ops

[Zhu Lingshan <lingshan.zhu@intel.com>]

This commit adds a new function get_vq_irq() in struct
vdpa_config_ops, which will return the irq number of a
virtqueue.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Suggested-by: Jason Wang <jasowang@redhat.com>
---
 include/linux/vdpa.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 239db794357c..ba898486f2c7 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -87,6 +87,11 @@ struct vdpa_device {
  *				@vdev: vdpa device
  *				@idx: virtqueue index
  *				Returns the notifcation area
+ * @get_vq_irq:			Get the irq number of a virtqueue
+ *				@vdev: vdpa device
+ *				@idx: virtqueue index
+ *				Returns int: irq number of a virtqueue,
+ *				negative number if no irq assigned.
  * @get_vq_align:		Get the virtqueue align requirement
  *				for the device
  *				@vdev: vdpa device
@@ -178,6 +183,7 @@ struct vdpa_config_ops {
 	u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);
 	struct vdpa_notification_area
 	(*get_vq_notification)(struct vdpa_device *vdev, u16 idx);
+	int (*get_vq_irq)(struct vdpa_device *vdv, u16 idx);
 
 	/* Device ops */
 	u32 (*get_vq_align)(struct vdpa_device *vdev);
-- 
2.18.4