diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-02-03 08:46:37 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-03-02 18:01:57 +0300 |
| commit | 2a2d1382fe9dccfce6f9c60a9c9fd2f0fe5bcf2b (patch) | |
| tree | ab3783be11369f689e3e7aebe0c438ab6746375f /include/linux/virtio.h | |
| parent | 780bc7903a32edb63be138487fd981694d993610 (diff) | |
| download | linux-2a2d1382fe9dccfce6f9c60a9c9fd2f0fe5bcf2b.tar.xz | |
virtio: Add improved queue allocation API
This leaves vring_new_virtqueue alone for compatbility, but it
adds two new improved APIs:
vring_create_virtqueue: Creates a virtqueue backed by automatically
allocated coherent memory. (Some day it this could be extended to
support non-coherent memory, too, if there ends up being a platform
on which it's worthwhile.)
__vring_new_virtqueue: Creates a virtqueue with a manually-specified
layout. This should allow mic_virtio to work much more cleanly.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 8f4d4bfa6d46..d5eb5479a425 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -75,8 +75,27 @@ unsigned int virtqueue_get_vring_size(struct virtqueue *vq); bool virtqueue_is_broken(struct virtqueue *vq); -void *virtqueue_get_avail(struct virtqueue *vq); -void *virtqueue_get_used(struct virtqueue *vq); +const struct vring *virtqueue_get_vring(struct virtqueue *vq); +dma_addr_t virtqueue_get_desc_addr(struct virtqueue *vq); +dma_addr_t virtqueue_get_avail_addr(struct virtqueue *vq); +dma_addr_t virtqueue_get_used_addr(struct virtqueue *vq); + +/* + * Legacy accessors -- in almost all cases, these are the wrong functions + * to use. + */ +static inline void *virtqueue_get_desc(struct virtqueue *vq) +{ + return virtqueue_get_vring(vq)->desc; +} +static inline void *virtqueue_get_avail(struct virtqueue *vq) +{ + return virtqueue_get_vring(vq)->avail; +} +static inline void *virtqueue_get_used(struct virtqueue *vq) +{ + return virtqueue_get_vring(vq)->used; +} /** * virtio_device - representation of a device using virtio |