From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- include/linux/virtio_ring.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'include/linux/virtio_ring.h') diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index a156e2b6c..e8d36938f 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -59,6 +59,35 @@ static inline void virtio_store_mb(bool weak_barriers, struct virtio_device; struct virtqueue; +/* + * Creates a virtqueue and allocates the descriptor ring. If + * may_reduce_num is set, then this may allocate a smaller ring than + * expected. The caller should query virtqueue_get_ring_size to learn + * the actual size of the ring. + */ +struct virtqueue *vring_create_virtqueue(unsigned int index, + unsigned int num, + unsigned int vring_align, + struct virtio_device *vdev, + bool weak_barriers, + bool may_reduce_num, + bool (*notify)(struct virtqueue *vq), + void (*callback)(struct virtqueue *vq), + const char *name); + +/* Creates a virtqueue with a custom layout. */ +struct virtqueue *__vring_new_virtqueue(unsigned int index, + struct vring vring, + struct virtio_device *vdev, + bool weak_barriers, + bool (*notify)(struct virtqueue *), + void (*callback)(struct virtqueue *), + const char *name); + +/* + * Creates a virtqueue with a standard layout but a caller-allocated + * ring. + */ struct virtqueue *vring_new_virtqueue(unsigned int index, unsigned int num, unsigned int vring_align, @@ -68,7 +97,13 @@ struct virtqueue *vring_new_virtqueue(unsigned int index, bool (*notify)(struct virtqueue *vq), void (*callback)(struct virtqueue *vq), const char *name); + +/* + * Destroys a virtqueue. If created with vring_create_virtqueue, this + * also frees the ring. + */ void vring_del_virtqueue(struct virtqueue *vq); + /* Filter out transport-specific feature bits. */ void vring_transport_features(struct virtio_device *vdev); -- cgit v1.2.3-54-g00ecf