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....@intel.com>
Suggested-by: Jason Wang <jasow...@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

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