UAPI: (Scripted) Disintegrate include/linux

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>

1 files changed, 2 insertions, 161 deletions

diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index c2d793a06ad7..63c6ea199519 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -1,167 +1,9 @@
 #ifndef _LINUX_VIRTIO_RING_H
 #define _LINUX_VIRTIO_RING_H
-/* An interface for efficient virtio implementation, currently for use by KVM
- * and lguest, but hopefully others soon.  Do NOT change this since it will
- * break existing servers and clients.
- *
- * This header is BSD licensed so anyone can use the definitions to implement
- * compatible drivers/servers.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of IBM nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Copyright Rusty Russell IBM Corporation 2007. */
-#include <linux/types.h>
 
-/* This marks a buffer as continuing via the next field. */
-#define VRING_DESC_F_NEXT	1
-/* This marks a buffer as write-only (otherwise read-only). */
-#define VRING_DESC_F_WRITE	2
-/* This means the buffer contains a list of buffer descriptors. */
-#define VRING_DESC_F_INDIRECT	4
-
-/* The Host uses this in used->flags to advise the Guest: don't kick me when
- * you add a buffer.  It's unreliable, so it's simply an optimization.  Guest
- * will still kick if it's out of buffers. */
-#define VRING_USED_F_NO_NOTIFY	1
-/* The Guest uses this in avail->flags to advise the Host: don't interrupt me
- * when you consume a buffer.  It's unreliable, so it's simply an
- * optimization.  */
-#define VRING_AVAIL_F_NO_INTERRUPT	1
-
-/* We support indirect buffer descriptors */
-#define VIRTIO_RING_F_INDIRECT_DESC	28
-
-/* The Guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field. */
-/* The Host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field. */
-#define VIRTIO_RING_F_EVENT_IDX		29
-
-/* Virtio ring descriptors: 16 bytes.  These can chain together via "next". */
-struct vring_desc {
-	/* Address (guest-physical). */
-	__u64 addr;
-	/* Length. */
-	__u32 len;
-	/* The flags as indicated above. */
-	__u16 flags;
-	/* We chain unused descriptors via this, too */
-	__u16 next;
-};
-
-struct vring_avail {
-	__u16 flags;
-	__u16 idx;
-	__u16 ring[];
-};
-
-/* u32 is used here for ids for padding reasons. */
-struct vring_used_elem {
-	/* Index of start of used descriptor chain. */
-	__u32 id;
-	/* Total length of the descriptor chain which was used (written to) */
-	__u32 len;
-};
-
-struct vring_used {
-	__u16 flags;
-	__u16 idx;
-	struct vring_used_elem ring[];
-};
-
-struct vring {
-	unsigned int num;
-
-	struct vring_desc *desc;
-
-	struct vring_avail *avail;
-
-	struct vring_used *used;
-};
-
-/* The standard layout for the ring is a continuous chunk of memory which looks
- * like this.  We assume num is a power of 2.
- *
- * struct vring
- * {
- *	// The actual descriptors (16 bytes each)
- *	struct vring_desc desc[num];
- *
- *	// A ring of available descriptor heads with free-running index.
- *	__u16 avail_flags;
- *	__u16 avail_idx;
- *	__u16 available[num];
- *	__u16 used_event_idx;
- *
- *	// Padding to the next align boundary.
- *	char pad[];
- *
- *	// A ring of used descriptor heads with free-running index.
- *	__u16 used_flags;
- *	__u16 used_idx;
- *	struct vring_used_elem used[num];
- *	__u16 avail_event_idx;
- * };
- */
-/* We publish the used event index at the end of the available ring, and vice
- * versa. They are at the end for backwards compatibility. */
-#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
-#define vring_avail_event(vr) (*(__u16 *)&(vr)->used->ring[(vr)->num])
-
-static inline void vring_init(struct vring *vr, unsigned int num, void *p,
-			      unsigned long align)
-{
-	vr->num = num;
-	vr->desc = p;
-	vr->avail = p + num*sizeof(struct vring_desc);
-	vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + sizeof(__u16)
-		+ align-1) & ~(align - 1));
-}
-
-static inline unsigned vring_size(unsigned int num, unsigned long align)
-{
-	return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
-		 + align - 1) & ~(align - 1))
-		+ sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num;
-}
-
-/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
-/* Assuming a given event_idx value from the other size, if
- * we have just incremented index from old to new_idx,
- * should we trigger an event? */
-static inline int vring_need_event(__u16 event_idx, __u16 new_idx, __u16 old)
-{
-	/* Note: Xen has similar logic for notification hold-off
-	 * in include/xen/interface/io/ring.h with req_event and req_prod
-	 * corresponding to event_idx + 1 and new_idx respectively.
-	 * Note also that req_event and req_prod in Xen start at 1,
-	 * event indexes in virtio start at 0. */
-	return (__u16)(new_idx - event_idx - 1) < (__u16)(new_idx - old);
-}
-
-#ifdef __KERNEL__
 #include <linux/irqreturn.h>
+#include <uapi/linux/virtio_ring.h>
+
 struct virtio_device;
 struct virtqueue;
 
@@ -179,5 +21,4 @@ void vring_del_virtqueue(struct virtqueue *vq);
 void vring_transport_features(struct virtio_device *vdev);
 
 irqreturn_t vring_interrupt(int irq, void *_vq);
-#endif /* __KERNEL__ */
 #endif /* _LINUX_VIRTIO_RING_H */