tools/virtio: use kernel's virtio.h

Replace virtio stubs with an include of the kernel header.

Message-ID: <[e-mail]>
Acked-by: Jason Wang <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>

tools/virtio/linux/virtio.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef LINUX_VIRTIO_H
-#define LINUX_VIRTIO_H
-#include <linux/scatterlist.h>
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-
-struct device {
-	void *parent;
-};
-
-struct virtio_device {
-	struct device dev;
-	u64 features;
-	struct list_head vqs;
-	spinlock_t vqs_list_lock;
-	const struct virtio_config_ops *config;
-};
-
-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;
-	unsigned int num_max;
-	void *priv;
-	bool reset;
-};
-
-/* Interfaces exported by virtio_ring. */
-int virtqueue_add_sgs(struct virtqueue *vq,
-		      struct scatterlist *sgs[],
-		      unsigned int out_sgs,
-		      unsigned int in_sgs,
-		      void *data,
-		      gfp_t gfp);
-
-int virtqueue_add_outbuf(struct virtqueue *vq,
-			 struct scatterlist sg[], unsigned int num,
-			 void *data,
-			 gfp_t gfp);
-
-int virtqueue_add_inbuf(struct virtqueue *vq,
-			struct scatterlist sg[], unsigned int num,
-			void *data,
-			gfp_t gfp);
-
-bool virtqueue_kick(struct virtqueue *vq);
-
-void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
-
-void virtqueue_disable_cb(struct virtqueue *vq);
-
-bool virtqueue_enable_cb(struct virtqueue *vq);
-bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
-
-void *virtqueue_detach_unused_buf(struct virtqueue *vq);
-struct virtqueue *vring_new_virtqueue(unsigned int index,
-				      unsigned int num,
-				      unsigned int vring_align,
-				      struct virtio_device *vdev,
-				      bool weak_barriers,
-				      bool ctx,
-				      void *pages,
-				      bool (*notify)(struct virtqueue *vq),
-				      void (*callback)(struct virtqueue *vq),
-				      const char *name);
-void vring_del_virtqueue(struct virtqueue *vq);
-
-#endif
+#include <../../include/linux/virtio.h>