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);
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