svn commit: r268480 - head/sys/dev/virtio

[Bryan Venteicher]

Author: bryanv
Date: Thu Jul 10 05:26:01 2014
New Revision: 268480
URL: http://svnweb.freebsd.org/changeset/base/268480

Log:
  Add accessor to get the number of free descriptors in the virtqueue
  
  MFC after:	1 month

Modified:
  head/sys/dev/virtio/virtqueue.c
  head/sys/dev/virtio/virtqueue.h

Modified: head/sys/dev/virtio/virtqueue.c
==============================================================================
--- head/sys/dev/virtio/virtqueue.c	Thu Jul 10 03:10:56 2014	(r268479)
+++ head/sys/dev/virtio/virtqueue.c	Thu Jul 10 05:26:01 2014	(r268480)
@@ -375,6 +375,13 @@ virtqueue_size(struct virtqueue *vq)
 }
 
 int
+virtqueue_nfree(struct virtqueue *vq)
+{
+
+	return (vq->vq_free_cnt);
+}
+
+int
 virtqueue_empty(struct virtqueue *vq)
 {
 

Modified: head/sys/dev/virtio/virtqueue.h
==============================================================================
--- head/sys/dev/virtio/virtqueue.h	Thu Jul 10 03:10:56 2014	(r268479)
+++ head/sys/dev/virtio/virtqueue.h	Thu Jul 10 05:26:01 2014	(r268480)
@@ -86,6 +86,7 @@ vm_paddr_t virtqueue_paddr(struct virtqu
 int	 virtqueue_full(struct virtqueue *vq);
 int	 virtqueue_empty(struct virtqueue *vq);
 int	 virtqueue_size(struct virtqueue *vq);
+int	 virtqueue_nfree(struct virtqueue *vq);
 int	 virtqueue_nused(struct virtqueue *vq);
 void	 virtqueue_notify(struct virtqueue *vq);
 void	 virtqueue_dump(struct virtqueue *vq);