diff options
| -rw-r--r-- | hw/net/vhost_net.c | 2 | ||||
| -rw-r--r-- | include/hw/virtio/dataplane/vring-accessors.h | 2 | ||||
| -rw-r--r-- | include/hw/virtio/dataplane/vring.h | 2 | ||||
| -rw-r--r-- | include/hw/virtio/virtio_ring.h | 167 |
4 files changed, 3 insertions, 170 deletions
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 4e3a061622..2ea1ef1dd0 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -35,7 +35,7 @@ #include <stdio.h> -#include "hw/virtio/virtio_ring.h" +#include "standard-headers/linux/virtio_ring.h" #include "hw/virtio/vhost.h" #include "hw/virtio/virtio-bus.h" diff --git a/include/hw/virtio/dataplane/vring-accessors.h b/include/hw/virtio/dataplane/vring-accessors.h index b508b87900..815c19b6ef 100644 --- a/include/hw/virtio/dataplane/vring-accessors.h +++ b/include/hw/virtio/dataplane/vring-accessors.h @@ -1,7 +1,7 @@ #ifndef VRING_ACCESSORS_H #define VRING_ACCESSORS_H -#include "hw/virtio/virtio_ring.h" +#include "standard-headers/linux/virtio_ring.h" #include "hw/virtio/virtio.h" #include "hw/virtio/virtio-access.h" diff --git a/include/hw/virtio/dataplane/vring.h b/include/hw/virtio/dataplane/vring.h index e42c0fc9cc..8d97db9e2d 100644 --- a/include/hw/virtio/dataplane/vring.h +++ b/include/hw/virtio/dataplane/vring.h @@ -18,7 +18,7 @@ #define VRING_H #include "qemu-common.h" -#include "hw/virtio/virtio_ring.h" +#include "standard-headers/linux/virtio_ring.h" #include "hw/virtio/virtio.h" typedef struct { diff --git a/include/hw/virtio/virtio_ring.h b/include/hw/virtio/virtio_ring.h deleted file mode 100644 index 0b42e6eae5..0000000000 --- a/include/hw/virtio/virtio_ring.h +++ /dev/null @@ -1,167 +0,0 @@ -#ifndef _LINUX_VIRTIO_RING_H -#define _LINUX_VIRTIO_RING_H -/* - * This file is copied from /usr/include/linux while converting __uNN types - * to uXX_t, __inline__ to inline, and tab to spaces. - * */ - -/* 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. */ - -/* 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). */ - uint64_t addr; - /* Length. */ - uint32_t len; - /* The flags as indicated above. */ - uint16_t flags; - /* We chain unused descriptors via this, too */ - uint16_t next; -}; - -struct vring_avail { - uint16_t flags; - uint16_t idx; - uint16_t ring[]; -}; - -/* u32 is used here for ids for padding reasons. */ -struct vring_used_elem { - /* Index of start of used descriptor chain. */ - uint32_t id; - /* Total length of the descriptor chain which was used (written to) */ - uint32_t len; -}; - -struct vring_used { - uint16_t flags; - uint16_t 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. - * uint16_t avail_flags; - * uint16_t avail_idx; - * uint16_t available[num]; - * uint16_t used_event_idx; - * - * // Padding to the next align boundary. - * char pad[]; - * - * // A ring of used descriptor heads with free-running index. - * uint16_t used_flags; - * uint16_t used_idx; - * struct vring_used_elem used[num]; - * uint16_t 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) (*(uint16_t *)&(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 *)(((uintptr_t)&vr->avail->ring[num] + sizeof(uint16_t) - + align - 1) & ~(align - 1)); -} - -static inline unsigned vring_size(unsigned int num, unsigned long align) -{ - return ((sizeof(struct vring_desc) * num + sizeof(uint16_t) * (3 + num) - + align - 1) & ~(align - 1)) - + sizeof(uint16_t) * 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(uint16_t event_idx, uint16_t new_idx, uint16_t 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 (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old); -} - -#endif /* _LINUX_VIRTIO_RING_H */ |