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Diffstat (limited to 'include/linux/virtio.h')
-rw-r--r--include/linux/virtio.h25
1 files changed, 23 insertions, 2 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 533b1157f22e..cf8adb1f5b2c 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -16,12 +16,20 @@
* @name: the name of this virtqueue (mainly for debugging)
* @vdev: the virtio device this queue was created for.
* @priv: a pointer for the virtqueue implementation to use.
+ * @index: the zero-based ordinal number for this queue.
+ * @num_free: number of elements we expect to be able to fit.
+ *
+ * A note on @num_free: with indirect buffers, each buffer needs one
+ * element in the queue, otherwise a buffer will need one element per
+ * sg element.
*/
struct virtqueue {
struct list_head list;
void (*callback)(struct virtqueue *vq);
const char *name;
struct virtio_device *vdev;
+ unsigned int index;
+ unsigned int num_free;
void *priv;
};
@@ -50,7 +58,11 @@ void *virtqueue_detach_unused_buf(struct virtqueue *vq);
unsigned int virtqueue_get_vring_size(struct virtqueue *vq);
-int virtqueue_get_queue_index(struct virtqueue *vq);
+/* FIXME: Obsolete accessor, but required for virtio_net merge. */
+static inline unsigned int virtqueue_get_queue_index(struct virtqueue *vq)
+{
+ return vq->index;
+}
/**
* virtio_device - representation of a device using virtio
@@ -73,7 +85,11 @@ struct virtio_device {
void *priv;
};
-#define dev_to_virtio(dev) container_of(dev, struct virtio_device, dev)
+static inline struct virtio_device *dev_to_virtio(struct device *_dev)
+{
+ return container_of(_dev, struct virtio_device, dev);
+}
+
int register_virtio_device(struct virtio_device *dev);
void unregister_virtio_device(struct virtio_device *dev);
@@ -103,6 +119,11 @@ struct virtio_driver {
#endif
};
+static inline struct virtio_driver *drv_to_virtio(struct device_driver *drv)
+{
+ return container_of(drv, struct virtio_driver, driver);
+}
+
int register_virtio_driver(struct virtio_driver *drv);
void unregister_virtio_driver(struct virtio_driver *drv);
#endif /* _LINUX_VIRTIO_H */